Merge cb0fae524f into 296f1f6dd8

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/28113)

.github/workflows/run-checker-ci.yml

@@ -32,7 +32,7 @@ jobs:
           no-http,
           no-legacy,
           no-sock,
-          no-ssl-trace,
+          no-sm2,
           no-stdio,
           no-threads,
           no-thread-pool,

.github/workflows/run-checker-daily.yml

@@ -102,13 +102,13 @@ jobs:
           no-shared,
           no-siphash,
           no-siv,
-          no-sm2,
           no-sm2-precomp,
           no-sm3,
           no-sm4,
           no-sock,
           no-sse2,
           no-ssl,
+          no-ssl-trace,
           enable-ssl3,
           enable-ssl3-method,
           enable-sslkeylog,

.gitignore

@@ -75,6 +75,7 @@ providers/common/der/der_rsa_gen.c
 providers/common/der/der_wrap_gen.c
 providers/common/der/der_sm2_gen.c
 providers/common/der/der_ml_dsa_gen.c
+providers/common/der/der_hkdf_gen.c
 providers/common/include/prov/der_slh_dsa.h
 providers/common/include/prov/der_dsa.h
 providers/common/include/prov/der_ec.h
@@ -84,6 +85,7 @@ providers/common/include/prov/der_digests.h
 providers/common/include/prov/der_wrap.h
 providers/common/include/prov/der_sm2.h
 providers/common/include/prov/der_ml_dsa.h
+providers/common/include/prov/der_hkdf.h
 providers/implementations/keymgmt/ml_dsa_kmgmt.c
 providers/implementations/keymgmt/ml_kem_kmgmt.c
 providers/implementations/keymgmt/mlx_kmgmt.c

CHANGES.md

@@ -145,6 +145,11 @@ OpenSSL 3.6
 
    *Michael Krueger, Martin Rauch*
 
+ * Added KEMRecipientInfo (RFC 9629) and ML-KEM (draft-ietf-lamps-cms-kyber)
+   support to CMS.
+
+   *Daniel Van Geest (CryptoNext Security)*
+
 OpenSSL 3.5
 -----------
 

Configurations/unix-Makefile.tmpl

@@ -1180,7 +1180,7 @@ generate_buildinfo: generate_doc_buildinfo
 
 .PHONY: doc-nits md-nits
 doc-nits: build_generated_pods ## Evaluate OpenSSL documentation
-	$(PERL) $(SRCDIR)/util/find-doc-nits -c -n -l -e -i
+	$(PERL) $(SRCDIR)/util/find-doc-nits -c -n -l -e -i -a
 
 # This uses "mdl", the markdownlint application, which is written in ruby.
 # The source is at https://github.com/markdownlint/markdownlint

apps/cms.c

@@ -53,6 +53,7 @@ static int cms_set_pkey_param(EVP_PKEY_CTX *pctx,
 static int verify_err = 0;
 
 typedef struct cms_key_param_st cms_key_param;
+typedef struct cms_recip_opt_st cms_recip_opt;
 
 struct cms_key_param_st {
     int idx;
@@ -60,6 +61,14 @@ struct cms_key_param_st {
     cms_key_param *next;
 };
 
+struct cms_recip_opt_st {
+    int idx;
+    const char *kdf;
+    unsigned char *ukm_data;
+    long ukm_data_length;
+    cms_recip_opt *next;
+};
+
 typedef enum OPTION_choice {
     OPT_COMMON,
     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENCRYPT,
@@ -85,7 +94,8 @@ typedef enum OPTION_choice {
     OPT_PROV_ENUM, OPT_CONFIG,
     OPT_V_ENUM,
     OPT_CIPHER, OPT_KEKCIPHER,
-    OPT_ORIGINATOR
+    OPT_ORIGINATOR,
+    OPT_RECIP_UKM, OPT_RECIP_KDF
 } OPTION_CHOICE;
 
 const OPTIONS cms_options[] = {
@@ -167,13 +177,15 @@ const OPTIONS cms_options[] = {
     {"kekcipher", OPT_KEKCIPHER, 's',
      "The key encryption algorithm to use"},
     {"wrap", OPT_WRAP, 's',
-     "Key wrap algorithm to use when encrypting with key agreement"},
+     "Key wrap algorithm to use when encrypting with key agreement or key encapsulation"},
     {"aes128-wrap", OPT_AES128_WRAP, '-', "Use AES128 to wrap key"},
     {"aes192-wrap", OPT_AES192_WRAP, '-', "Use AES192 to wrap key"},
     {"aes256-wrap", OPT_AES256_WRAP, '-', "Use AES256 to wrap key"},
     {"des3-wrap", OPT_3DES_WRAP, '-', "Use 3DES-EDE to wrap key"},
     {"debug_decrypt", OPT_DEBUG_DECRYPT, '-',
      "Disable MMA protection, return error if no recipient found (see doc)"},
+    {"recip_kdf", OPT_RECIP_KDF, 's', "Set KEMRecipientInfo KDF for current recipient"},
+    {"recip_ukm", OPT_RECIP_UKM, 's', "KEMRecipientInfo user keying material for current recipient, in hex notation"},
 
     OPT_SECTION("Signing"),
     {"md", OPT_MD, 's', "Digest algorithm to use"},
@@ -281,6 +293,19 @@ static CMS_ContentInfo *load_content_info(int informat, BIO *in, int flags,
     return NULL;
 }
 
+static cms_recip_opt *alloc_recip_opt(int recipidx)
+{
+    cms_recip_opt *opt;
+
+    opt = app_malloc(sizeof(*opt), "recipient options buffer");
+    opt->idx = recipidx;
+    opt->next = NULL;
+    opt->kdf = NULL;
+    opt->ukm_data = NULL;
+    opt->ukm_data_length = 0;
+    return opt;
+}
+
 int cms_main(int argc, char **argv)
 {
     CONF *conf = NULL;
@@ -319,6 +344,8 @@ int cms_main(int argc, char **argv)
     size_t secret_keylen = 0, secret_keyidlen = 0;
     unsigned char *pwri_pass = NULL, *pwri_tmp = NULL;
     unsigned char *secret_key = NULL, *secret_keyid = NULL;
+    cms_recip_opt *recip_first = NULL, *recip_opt = NULL;
+    int recipidx = -1;
     long ltmp;
     const char *mime_eol = "\n";
     OPTION_CHOICE o;
@@ -653,6 +680,46 @@ int cms_main(int argc, char **argv)
                 recipfile = opt_arg();
             }
             break;
+        case OPT_RECIP_KDF:
+        case OPT_RECIP_UKM:
+            recipidx = -1;
+            if (operation == SMIME_ENCRYPT) {
+                if (sk_X509_num(encerts) > 0)
+                    recipidx += sk_X509_num(encerts);
+            }
+            if (recipidx < 0) {
+                BIO_printf(bio_err, "No recipient specified\n");
+                goto opthelp;
+            }
+            if (recip_opt == NULL || recip_opt->idx != recipidx) {
+                cms_recip_opt *nopt;
+
+                nopt = alloc_recip_opt(recipidx);
+                if (recip_first == NULL)
+                    recip_first = nopt;
+                else
+                    recip_opt->next = nopt;
+                recip_opt = nopt;
+            }
+            if (o == OPT_RECIP_KDF) {
+                if (recip_opt->kdf != NULL) {
+                    BIO_puts(bio_err, "Illegal multiple -recip_kdf for one -recip\n");
+                    goto end;
+                }
+                recip_opt->kdf = opt_arg();
+            } else {
+                if (recip_opt->ukm_data != NULL) {
+                    BIO_puts(bio_err, "Illegal multiple -recip_ukm for one -recip\n");
+                    goto end;
+                }
+                recip_opt->ukm_data = OPENSSL_hexstr2buf(opt_arg(),
+                                                         &recip_opt->ukm_data_length);
+                if (recip_opt->ukm_data == NULL) {
+                    BIO_printf(bio_err, "Invalid hex value after -recip_ukm\n");
+                    goto end;
+                }
+            }
+            break;
         case OPT_CIPHER:
             ciphername = opt_unknown();
             break;
@@ -831,6 +898,9 @@ int cms_main(int argc, char **argv)
     if (operation != SMIME_ENCRYPT && *argv != NULL)
         BIO_printf(bio_err,
                    "Warning: recipient certificate file parameters ignored for operation other than -encrypt\n");
+    if (operation != SMIME_ENCRYPT && recip_first != NULL)
+        BIO_printf(bio_err,
+                   "Warning: -recip_kdf and -recip_ukm parameters ignored for operation other than -encrypt\n");
 
     if ((flags & CMS_BINARY) != 0) {
         if (!(operation & SMIME_OP))
@@ -990,7 +1060,9 @@ int cms_main(int argc, char **argv)
             goto end;
         for (i = 0; i < sk_X509_num(encerts); i++) {
             CMS_RecipientInfo *ri;
+            int ri_type;
             cms_key_param *kparam;
+            cms_recip_opt *ropt;
             int tflags = flags | CMS_KEY_PARAM;
             /* This flag enforces allocating the EVP_PKEY_CTX for the recipient here */
             EVP_PKEY_CTX *pctx;
@@ -998,14 +1070,19 @@ int cms_main(int argc, char **argv)
             int res;
 
             for (kparam = key_first; kparam; kparam = kparam->next) {
-                if (kparam->idx == i) {
+                if (kparam->idx == i)
+                    break;
+            }
+            for (ropt = recip_first; ropt; ropt = ropt->next) {
+                if (ropt->idx == i)
                     break;
-                }
             }
             ri = CMS_add1_recipient(cms, x, key, originator, tflags);
             if (ri == NULL)
                 goto end;
 
+            ri_type = CMS_RecipientInfo_type(ri);
+
             pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
             if (pctx != NULL && kparam != NULL) {
                 if (!cms_set_pkey_param(pctx, kparam->param))
@@ -1018,12 +1095,39 @@ int cms_main(int argc, char **argv)
             if (res <= 0 && res != -2)
                 goto end;
 
-            if (CMS_RecipientInfo_type(ri) == CMS_RECIPINFO_AGREE
-                    && wrap_cipher != NULL) {
-                EVP_CIPHER_CTX *wctx;
-                wctx = CMS_RecipientInfo_kari_get0_ctx(ri);
-                if (EVP_EncryptInit_ex(wctx, wrap_cipher, NULL, NULL, NULL) != 1)
-                    goto end;
+            if (wrap_cipher != NULL) {
+                EVP_CIPHER_CTX *wctx = NULL;
+
+                if (ri_type == CMS_RECIPINFO_AGREE)
+                    wctx = CMS_RecipientInfo_kari_get0_ctx(ri);
+                else if (ri_type == CMS_RECIPINFO_KEM)
+                    wctx = CMS_RecipientInfo_kemri_get0_ctx(ri);
+                if (wctx != NULL) {
+                    if (EVP_EncryptInit_ex(wctx, wrap_cipher, NULL, NULL, NULL) != 1)
+                        goto end;
+                }
+            }
+
+            if (ropt != NULL && ri_type == CMS_RECIPINFO_KEM) {
+                if (ropt->ukm_data != NULL) {
+                    if (!CMS_RecipientInfo_kemri_set_ukm(ri, ropt->ukm_data,
+                                                         (int)ropt->ukm_data_length))
+                        goto end;
+                }
+                if (ropt->kdf != NULL) {
+                    X509_ALGOR *kdf_algo;
+                    ASN1_OBJECT *kdf_obj;
+
+                    kdf_algo = CMS_RecipientInfo_kemri_get0_kdf_alg(ri);
+                    kdf_obj = OBJ_txt2obj(ropt->kdf, 0);
+                    if (kdf_obj == NULL) {
+                        BIO_printf(bio_err, "Unknown KDF %s\n", ropt->kdf);
+                        goto end;
+                    }
+                    /* Only works for OIDs without params */
+                    if (!X509_ALGOR_set0(kdf_algo, kdf_obj, V_ASN1_UNDEF, NULL))
+                        goto end;
+                }
             }
         }
 
@@ -1315,6 +1419,14 @@ int cms_main(int argc, char **argv)
         OPENSSL_free(key_param);
         key_param = tparam;
     }
+    for (recip_opt = recip_first; recip_opt != NULL;) {
+        cms_recip_opt *topt;
+
+        OPENSSL_free(recip_opt->ukm_data);
+        topt = recip_opt->next;
+        OPENSSL_free(recip_opt);
+        recip_opt = topt;
+    }
     X509_STORE_free(store);
     X509_free(cert);
     X509_free(recip);

apps/lib/apps.c

@@ -3047,15 +3047,11 @@ BIO *dup_bio_out(int format)
 {
     BIO *b = BIO_new_fp(stdout,
                         BIO_NOCLOSE | (FMT_istext(format) ? BIO_FP_TEXT : 0));
-    void *prefix = NULL;
-    BIO *btmp;
-
-    if (b == NULL)
-        return NULL;
 
 #ifdef OPENSSL_SYS_VMS
-    if (FMT_istext(format)) {
-        btmp = BIO_new(BIO_f_linebuffer());
+    if (b != NULL && FMT_istext(format)) {
+        BIO *btmp = BIO_new(BIO_f_linebuffer());
+
         if (btmp == NULL) {
             BIO_free(b);
             return NULL;
@@ -3064,17 +3060,6 @@ BIO *dup_bio_out(int format)
     }
 #endif
 
-    if (FMT_istext(format)
-        && (prefix = getenv("HARNESS_OSSL_PREFIX")) != NULL) {
-        btmp = BIO_new(BIO_f_prefix());
-        if (btmp == NULL) {
-            BIO_free_all(b);
-            return NULL;
-        }
-        b = BIO_push(btmp, b);
-        BIO_set_prefix(b, prefix);
-    }
-
     return b;
 }
 

apps/progs.pl

@@ -93,7 +93,6 @@ EOF
 
     my %cmd_disabler = (
         ciphers  => "sock",
-        genrsa   => "rsa",
         gendsa   => "dsa",
         dsaparam => "dsa",
         gendh    => "dh",
@@ -107,7 +106,7 @@ EOF
 #   [2] = preprocessor conditional for excluding irrespective of deprecation
 #        rsa      => [ "pkey",      "3_0", "rsa" ],
 #        genrsa   => [ "genpkey",   "3_0", "rsa" ],
-        rsautl   => [ "pkeyutl",   "3_0", "rsa" ],
+        rsautl   => [ "pkeyutl",   "3_0", "" ],
 #        dhparam  => [ "pkeyparam", "3_0", "dh"  ],
 #        dsaparam => [ "pkeyparam", "3_0", "dsa" ],
 #        dsa      => [ "pkey",      "3_0", "dsa" ],

apps/s_server.c

@@ -635,7 +635,7 @@ static int bring_ocsp_resp_in_correct_order(SSL *s, tlsextstatusctx *srctx,
     /* reserve enough space so the pushes to the stack would not fail */
     *sk_resp = sk_OCSP_RESPONSE_new_reserve(NULL, num);
 
-    if (sk_resp == NULL)
+    if (*sk_resp == NULL)
         return SSL_TLSEXT_ERR_ALERT_FATAL;
 
     for (i = 0; i < num; i++) {
@@ -755,8 +755,10 @@ static int get_ocsp_resp_from_responder(SSL *s, tlsextstatusctx *srctx,
     STACK_OF(X509) *server_certs = NULL;
     OCSP_RESPONSE *resp = NULL;
 
-    if (*sk_resp != NULL)
+    if (*sk_resp != NULL) {
         sk_OCSP_RESPONSE_pop_free(*sk_resp, OCSP_RESPONSE_free);
+        *sk_resp = NULL;
+    }
 
     SSL_get0_chain_certs(s, &server_certs);
     /*
@@ -784,7 +786,7 @@ static int get_ocsp_resp_from_responder(SSL *s, tlsextstatusctx *srctx,
 
     *sk_resp = sk_OCSP_RESPONSE_new_reserve(NULL, num);
 
-    if (sk_resp == NULL)
+    if (*sk_resp == NULL)
         return SSL_TLSEXT_ERR_ALERT_FATAL;
 
     /* for each certificate in chain (except root) get the OCSP response */

crypto/cms/build.info

@@ -2,4 +2,4 @@ LIBS=../../libcrypto
 SOURCE[../../libcrypto]= \
         cms_lib.c cms_asn1.c cms_att.c cms_io.c cms_smime.c cms_err.c \
         cms_sd.c cms_dd.c cms_cd.c cms_env.c cms_enc.c cms_ess.c \
-        cms_pwri.c cms_kari.c cms_rsa.c cms_dh.c cms_ec.c
+        cms_pwri.c cms_kari.c cms_rsa.c cms_dh.c cms_ec.c cms_kem.c cms_kemri.c

crypto/cms/cms_asn1.c

@@ -201,10 +201,52 @@ ASN1_SEQUENCE(CMS_PasswordRecipientInfo) = {
         ASN1_SIMPLE(CMS_PasswordRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
 } ASN1_SEQUENCE_END(CMS_PasswordRecipientInfo)
 
+static int cms_kemri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
+                        void *exarg)
+{
+    CMS_KEMRecipientInfo *kemri = (CMS_KEMRecipientInfo *)*pval;
+
+    if (operation == ASN1_OP_NEW_POST) {
+        kemri->ctx = EVP_CIPHER_CTX_new();
+        if (kemri->ctx == NULL)
+            return 0;
+        EVP_CIPHER_CTX_set_flags(kemri->ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
+        kemri->pctx = NULL;
+    } else if (operation == ASN1_OP_FREE_POST) {
+        EVP_PKEY_CTX_free(kemri->pctx);
+        EVP_CIPHER_CTX_free(kemri->ctx);
+        ASN1_OCTET_STRING_free(kemri->ukm);
+    }
+    return 1;
+}
+
+ASN1_SEQUENCE_cb(CMS_KEMRecipientInfo, cms_kemri_cb) = {
+        ASN1_EMBED(CMS_KEMRecipientInfo, version, INT32),
+        ASN1_SIMPLE(CMS_KEMRecipientInfo, rid, CMS_SignerIdentifier),
+        ASN1_SIMPLE(CMS_KEMRecipientInfo, kem, X509_ALGOR),
+        ASN1_SIMPLE(CMS_KEMRecipientInfo, kemct, ASN1_OCTET_STRING),
+        ASN1_SIMPLE(CMS_KEMRecipientInfo, kdf, X509_ALGOR),
+        ASN1_EMBED(CMS_KEMRecipientInfo, kekLength, INT32),
+        ASN1_EXP_OPT(CMS_KEMRecipientInfo, ukm, ASN1_OCTET_STRING, 0),
+        ASN1_SIMPLE(CMS_KEMRecipientInfo, wrap, X509_ALGOR),
+        ASN1_SIMPLE(CMS_KEMRecipientInfo, encryptedKey, ASN1_OCTET_STRING)
+} ASN1_SEQUENCE_END_cb(CMS_KEMRecipientInfo, CMS_KEMRecipientInfo)
+
+ASN1_ADB_TEMPLATE(ori_def) = ASN1_SIMPLE(CMS_OtherRecipientInfo, d.other, ASN1_ANY);
+
+ASN1_ADB(CMS_OtherRecipientInfo) = {
+        ADB_ENTRY(NID_id_smime_ori_kem, ASN1_SIMPLE(CMS_OtherRecipientInfo, d.kemri,
+                  CMS_KEMRecipientInfo))
+} ASN1_ADB_END(CMS_OtherRecipientInfo, 0, oriType, 0, &ori_def_tt, NULL);
+
+DECLARE_ASN1_FUNCTIONS(CMS_OtherRecipientInfo)
+
 ASN1_SEQUENCE(CMS_OtherRecipientInfo) = {
   ASN1_SIMPLE(CMS_OtherRecipientInfo, oriType, ASN1_OBJECT),
-  ASN1_OPT(CMS_OtherRecipientInfo, oriValue, ASN1_ANY)
-} static_ASN1_SEQUENCE_END(CMS_OtherRecipientInfo)
+  ASN1_ADB_OBJECT(CMS_OtherRecipientInfo)
+} ASN1_SEQUENCE_END(CMS_OtherRecipientInfo)
+
+IMPLEMENT_ASN1_FUNCTIONS(CMS_OtherRecipientInfo)
 
 /* Free up RecipientInfo additional data */
 static int cms_ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
@@ -224,6 +266,23 @@ static int cms_ri_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
             CMS_PasswordRecipientInfo *pwri = ri->d.pwri;
             OPENSSL_clear_free(pwri->pass, pwri->passlen);
         }
+    } else if (operation == ASN1_OP_D2I_POST) {
+        CMS_RecipientInfo *ri = (CMS_RecipientInfo *)*pval;
+
+        ri->type = ri->encoded_type;
+        if (ri->type == CMS_RECIPINFO_OTHER) {
+            int nid;
+
+            nid = OBJ_obj2nid(ri->d.ori->oriType);
+            /* For ORI, map NID to specific type */
+            if (nid == NID_id_smime_ori_kem)
+                ri->type = CMS_RECIPINFO_KEM;
+            /* Otherwise stay with generic CMS_RECIPINFO_OTHER type */
+        }
+    } else if (operation == ASN1_OP_NEW_POST) {
+        CMS_RecipientInfo *ri = (CMS_RecipientInfo *)*pval;
+
+        ri->type = ri->encoded_type;
     }
     return 1;
 }
@@ -234,7 +293,7 @@ ASN1_CHOICE_cb(CMS_RecipientInfo, cms_ri_cb) = {
         ASN1_IMP(CMS_RecipientInfo, d.kekri, CMS_KEKRecipientInfo, 2),
         ASN1_IMP(CMS_RecipientInfo, d.pwri, CMS_PasswordRecipientInfo, 3),
         ASN1_IMP(CMS_RecipientInfo, d.ori, CMS_OtherRecipientInfo, 4)
-} ASN1_CHOICE_END_cb(CMS_RecipientInfo, CMS_RecipientInfo, type)
+} ASN1_CHOICE_END_cb(CMS_RecipientInfo, CMS_RecipientInfo, encoded_type)
 
 ASN1_NDEF_SEQUENCE(CMS_EnvelopedData) = {
         ASN1_EMBED(CMS_EnvelopedData, version, INT32),
@@ -430,3 +489,33 @@ int CMS_SharedInfo_encode(unsigned char **pder, X509_ALGOR *kekalg,
     intsi.pecsi = &ecsi;
     return ASN1_item_i2d(intsi.a, pder, ASN1_ITEM_rptr(CMS_SharedInfo));
 }
+
+/*
+ * Utilities to encode the CMS_CMSORIforKEMOtherInfo structure used during key
+ * derivation.
+ */
+
+typedef struct {
+    X509_ALGOR *wrap;
+    uint32_t kekLength;
+    ASN1_OCTET_STRING *ukm;
+} CMS_CMSORIforKEMOtherInfo;
+
+ASN1_SEQUENCE(CMS_CMSORIforKEMOtherInfo) = {
+        ASN1_SIMPLE(CMS_CMSORIforKEMOtherInfo, wrap, X509_ALGOR),
+        ASN1_EMBED(CMS_CMSORIforKEMOtherInfo, kekLength, INT32),
+        ASN1_EXP_OPT(CMS_CMSORIforKEMOtherInfo, ukm, ASN1_OCTET_STRING, 0),
+} static_ASN1_SEQUENCE_END(CMS_CMSORIforKEMOtherInfo)
+
+int CMS_CMSORIforKEMOtherInfo_encode(unsigned char **pder, X509_ALGOR *wrap,
+                                     ASN1_OCTET_STRING *ukm, int keylen)
+{
+    CMS_CMSORIforKEMOtherInfo kem_otherinfo;
+
+    kem_otherinfo.wrap = wrap;
+    kem_otherinfo.kekLength = keylen;
+    kem_otherinfo.ukm = ukm;
+
+    return ASN1_item_i2d((ASN1_VALUE *)&kem_otherinfo, pder,
+                         ASN1_ITEM_rptr(CMS_CMSORIforKEMOtherInfo));
+}

crypto/cms/cms_env.c

@@ -7,6 +7,12 @@
  * https://www.openssl.org/source/license.html
  */
 
+/*
+ * Low level key APIs (DH etc) are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
+
 #include "internal/cryptlib.h"
 #include <openssl/asn1t.h>
 #include <openssl/pem.h>
@@ -14,6 +20,7 @@
 #include <openssl/err.h>
 #include <openssl/cms.h>
 #include <openssl/evp.h>
+#include <openssl/core_names.h>
 #include "internal/sizes.h"
 #include "crypto/asn1.h"
 #include "crypto/evp.h"
@@ -111,9 +118,12 @@ int ossl_cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd)
 {
     EVP_PKEY *pkey;
     int i;
-    if (ri->type == CMS_RECIPINFO_TRANS)
+
+    switch (ri->type) {
+    case CMS_RECIPINFO_TRANS:
         pkey = ri->d.ktri->pkey;
-    else if (ri->type == CMS_RECIPINFO_AGREE) {
+        break;
+    case CMS_RECIPINFO_AGREE: {
         EVP_PKEY_CTX *pctx = ri->d.kari->pctx;
 
         if (pctx == NULL)
@@ -121,8 +131,13 @@ int ossl_cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd)
         pkey = EVP_PKEY_CTX_get0_pkey(pctx);
         if (pkey == NULL)
             return 0;
-    } else
+        break;
+    }
+    case CMS_RECIPINFO_KEM:
+        return ossl_cms_kem_envelope(ri, cmd);
+    default:
         return 0;
+    }
 
     if (EVP_PKEY_is_a(pkey, "DHX") || EVP_PKEY_is_a(pkey, "DH"))
         return ossl_cms_dh_envelope(ri, cmd);
@@ -202,6 +217,9 @@ void ossl_cms_RecipientInfos_set_cmsctx(CMS_ContentInfo *cms)
             case CMS_RECIPINFO_PASS:
                 ri->d.pwri->cms_ctx = ctx;
                 break;
+            case CMS_RECIPINFO_KEM:
+                ri->d.ori->d.kemri->cms_ctx = ctx;
+                break;
             default:
                 break;
             }
@@ -220,6 +238,8 @@ EVP_PKEY_CTX *CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri)
         return ri->d.ktri->pctx;
     else if (ri->type == CMS_RECIPINFO_AGREE)
         return ri->d.kari->pctx;
+    else if (ri->type == CMS_RECIPINFO_KEM)
+        return ri->d.ori->d.kemri->pctx;
     return NULL;
 }
 
@@ -336,7 +356,7 @@ static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip,
     ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo);
     if (!ri->d.ktri)
         return 0;
-    ri->type = CMS_RECIPINFO_TRANS;
+    ri->encoded_type = ri->type = CMS_RECIPINFO_TRANS;
 
     ktri = ri->d.ktri;
     ktri->cms_ctx = ctx;
@@ -423,6 +443,11 @@ CMS_RecipientInfo *CMS_add1_recipient(CMS_ContentInfo *cms, X509 *recip,
             goto err;
         break;
 
+    case CMS_RECIPINFO_KEM:
+        if (!ossl_cms_RecipientInfo_kemri_init(ri, recip, pk, flags, ctx))
+            goto err;
+        break;
+
     default:
         ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
         goto err;
@@ -750,7 +775,7 @@ CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid,
         ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
         goto err;
     }
-    ri->type = CMS_RECIPINFO_KEK;
+    ri->encoded_type = ri->type = CMS_RECIPINFO_KEK;
 
     kekri = ri->d.kekri;
 
@@ -1025,6 +1050,9 @@ int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
     case CMS_RECIPINFO_PASS:
         return ossl_cms_RecipientInfo_pwri_crypt(cms, ri, 0);
 
+    case CMS_RECIPINFO_KEM:
+        return ossl_cms_RecipientInfo_kemri_decrypt(cms, ri);
+
     default:
         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_RECIPIENTINFO_TYPE);
         return 0;
@@ -1046,6 +1074,9 @@ int CMS_RecipientInfo_encrypt(const CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
     case CMS_RECIPINFO_PASS:
         return ossl_cms_RecipientInfo_pwri_crypt(cms, ri, 1);
 
+    case CMS_RECIPINFO_KEM:
+        return ossl_cms_RecipientInfo_kemri_encrypt(cms, ri);
+
     default:
         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_RECIPIENT_TYPE);
         return 0;
@@ -1100,7 +1131,8 @@ static void cms_env_set_version(CMS_EnvelopedData *env)
 
     for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) {
         ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i);
-        if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) {
+        if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER
+            || ri->type == CMS_RECIPINFO_KEM) {
             env->version = 3;
             return;
         } else if (ri->type != CMS_RECIPINFO_TRANS
@@ -1337,6 +1369,18 @@ err:
  */
 int ossl_cms_pkey_get_ri_type(EVP_PKEY *pk)
 {
+    int ri_type;
+    EVP_PKEY_CTX *ctx = NULL;
+
+    /*
+     * First check the provider for RecipientInfo support since a key may support
+     * multiple types, e.g. an RSA key and provider may support RSA key transport
+     * and/or RSA-KEM.
+     */
+    if (evp_pkey_is_provided(pk)
+        && EVP_PKEY_get_int_param(pk, OSSL_PKEY_PARAM_CMS_RI_TYPE, &ri_type))
+        return ri_type;
+
     /* Check types that we know about */
     if (EVP_PKEY_is_a(pk, "DH"))
         return CMS_RECIPINFO_AGREE;
@@ -1350,7 +1394,7 @@ int ossl_cms_pkey_get_ri_type(EVP_PKEY *pk)
         return CMS_RECIPINFO_TRANS;
 
     /*
-     * Otherwise this might ben an engine implementation, so see if we can get
+     * Otherwise this might be an engine implementation, so see if we can get
      * the type from the ameth.
      */
     if (pk->ameth && pk->ameth->pkey_ctrl) {
@@ -1359,7 +1403,25 @@ int ossl_cms_pkey_get_ri_type(EVP_PKEY *pk)
         if (i > 0)
             return r;
     }
-    return CMS_RECIPINFO_TRANS;
+
+    /*
+     * Otherwise try very hard to figure out what RecipientInfo the key supports.
+     */
+    ri_type = CMS_RECIPINFO_TRANS;
+    ctx = EVP_PKEY_CTX_new(pk, NULL);
+    if (ctx != NULL) {
+        ERR_set_mark();
+        if (EVP_PKEY_encrypt_init(ctx) > 0)
+            ri_type = CMS_RECIPINFO_TRANS;
+        else if (EVP_PKEY_derive_init(ctx) > 0)
+            ri_type = CMS_RECIPINFO_AGREE;
+        else if (EVP_PKEY_encapsulate_init(ctx, NULL) > 0)
+            ri_type = CMS_RECIPINFO_KEM;
+        ERR_pop_to_mark();
+    }
+    EVP_PKEY_CTX_free(ctx);
+
+    return ri_type;
 }
 
 int ossl_cms_pkey_is_ri_type_supported(EVP_PKEY *pk, int ri_type)
@@ -1381,3 +1443,79 @@ int ossl_cms_pkey_is_ri_type_supported(EVP_PKEY *pk, int ri_type)
 
     return (supportedRiType == ri_type);
 }
+
+int ossl_cms_RecipientInfo_wrap_init(CMS_RecipientInfo *ri,
+                                     const EVP_CIPHER *cipher)
+{
+    const CMS_CTX *cms_ctx;
+    EVP_CIPHER_CTX *ctx;
+    const EVP_CIPHER *kekcipher;
+    EVP_CIPHER *fetched_kekcipher;
+    const char *kekcipher_name;
+    int keylen;
+    int ret;
+
+    if (ri->type == CMS_RECIPINFO_AGREE) {
+        cms_ctx = ri->d.kari->cms_ctx;
+        ctx = ri->d.kari->ctx;
+    } else if (ri->type == CMS_RECIPINFO_KEM) {
+        cms_ctx = ri->d.ori->d.kemri->cms_ctx;
+        ctx = ri->d.ori->d.kemri->ctx;
+    } else {
+        ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_RECIPIENTINFO_TYPE);
+        return 0;
+    }
+
+    /* If a suitable wrap algorithm is already set nothing to do */
+    kekcipher = EVP_CIPHER_CTX_get0_cipher(ctx);
+    if (kekcipher != NULL) {
+        if (EVP_CIPHER_CTX_get_mode(ctx) != EVP_CIPH_WRAP_MODE)
+            return 0;
+        return 1;
+    }
+    if (cipher == NULL)
+        return 0;
+    keylen = EVP_CIPHER_get_key_length(cipher);
+    if (keylen <= 0) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH);
+        return 0;
+    }
+    if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_GET_WRAP_CIPHER) != 0) {
+        ret = EVP_CIPHER_meth_get_ctrl(cipher)(NULL, EVP_CTRL_GET_WRAP_CIPHER,
+                                               0, &kekcipher);
+        if (ret <= 0)
+            return 0;
+
+        if (kekcipher != NULL) {
+            if (EVP_CIPHER_get_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
+                return 0;
+            kekcipher_name = EVP_CIPHER_get0_name(kekcipher);
+            goto enc;
+        }
+    }
+
+    /*
+     * Pick a cipher based on content encryption cipher. If it is DES3 use
+     * DES3 wrap otherwise use AES wrap similar to key size.
+     */
+#ifndef OPENSSL_NO_DES
+    if (EVP_CIPHER_get_type(cipher) == NID_des_ede3_cbc)
+        kekcipher_name = SN_id_smime_alg_CMS3DESwrap;
+    else
+#endif
+    if (keylen <= 16)
+        kekcipher_name = SN_id_aes128_wrap;
+    else if (keylen <= 24)
+        kekcipher_name = SN_id_aes192_wrap;
+    else
+        kekcipher_name = SN_id_aes256_wrap;
+enc:
+    fetched_kekcipher = EVP_CIPHER_fetch(ossl_cms_ctx_get0_libctx(cms_ctx),
+                                         kekcipher_name,
+                                         ossl_cms_ctx_get0_propq(cms_ctx));
+    if (fetched_kekcipher == NULL)
+        return 0;
+    ret = EVP_EncryptInit_ex(ctx, fetched_kekcipher, NULL, NULL, NULL);
+    EVP_CIPHER_free(fetched_kekcipher);
+    return ret;
+}

crypto/cms/cms_err.c

@@ -88,6 +88,7 @@ static const ERR_STRING_DATA CMS_str_reasons[] = {
      "not a signed receipt"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_NOT_ENCRYPTED_DATA), "not encrypted data"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_NOT_KEK), "not kek"},
+    {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_NOT_KEM), "not kem"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_NOT_KEY_AGREEMENT), "not key agreement"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_NOT_KEY_TRANSPORT), "not key transport"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_NOT_PWRI), "not pwri"},
@@ -140,6 +141,8 @@ static const ERR_STRING_DATA CMS_str_reasons[] = {
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNKNOWN_DIGEST_ALGORITHM),
      "unknown digest algorithm"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNKNOWN_ID), "unknown id"},
+    {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNKNOWN_KDF_ALGORITHM),
+     "unknown kdf algorithm"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM),
      "unsupported compression algorithm"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNSUPPORTED_CONTENT_ENCRYPTION_ALGORITHM),
@@ -148,6 +151,8 @@ static const ERR_STRING_DATA CMS_str_reasons[] = {
      "unsupported content type"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNSUPPORTED_ENCRYPTION_TYPE),
      "unsupported encryption type"},
+    {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNSUPPORTED_KDF_ALGORITHM),
+     "unsupported kdf algorithm"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNSUPPORTED_KEK_ALGORITHM),
      "unsupported kek algorithm"},
     {ERR_PACK(ERR_LIB_CMS, 0, CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM),

crypto/cms/cms_kari.c

@@ -7,12 +7,6 @@
  * https://www.openssl.org/source/license.html
  */
 
-/*
- * Low level key APIs (DH etc) are deprecated for public use, but still ok for
- * internal use.
- */
-#include "internal/deprecated.h"
-
 #include "internal/cryptlib.h"
 #include <openssl/asn1t.h>
 #include <openssl/pem.h>
@@ -349,7 +343,7 @@ int ossl_cms_RecipientInfo_kari_init(CMS_RecipientInfo *ri,  X509 *recip,
     ri->d.kari = M_ASN1_new_of(CMS_KeyAgreeRecipientInfo);
     if (ri->d.kari == NULL)
         return 0;
-    ri->type = CMS_RECIPINFO_AGREE;
+    ri->encoded_type = ri->type = CMS_RECIPINFO_AGREE;
 
     kari = ri->d.kari;
     kari->version = 3;
@@ -412,67 +406,6 @@ int ossl_cms_RecipientInfo_kari_init(CMS_RecipientInfo *ri,  X509 *recip,
     return 1;
 }
 
-static int cms_wrap_init(CMS_KeyAgreeRecipientInfo *kari,
-                         const EVP_CIPHER *cipher)
-{
-    const CMS_CTX *cms_ctx = kari->cms_ctx;
-    EVP_CIPHER_CTX *ctx = kari->ctx;
-    const EVP_CIPHER *kekcipher;
-    EVP_CIPHER *fetched_kekcipher;
-    const char *kekcipher_name;
-    int keylen;
-    int ret;
-
-    /* If a suitable wrap algorithm is already set nothing to do */
-    kekcipher = EVP_CIPHER_CTX_get0_cipher(ctx);
-    if (kekcipher != NULL) {
-        if (EVP_CIPHER_CTX_get_mode(ctx) != EVP_CIPH_WRAP_MODE)
-            return 0;
-        return 1;
-    }
-    if (cipher == NULL)
-        return 0;
-    keylen = EVP_CIPHER_get_key_length(cipher);
-    if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_GET_WRAP_CIPHER) != 0) {
-        ret = EVP_CIPHER_meth_get_ctrl(cipher)(NULL, EVP_CTRL_GET_WRAP_CIPHER,
-                                               0, &kekcipher);
-        if (ret <= 0)
-             return 0;
-
-        if (kekcipher != NULL) {
-             if (EVP_CIPHER_get_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
-                 return 0;
-             kekcipher_name = EVP_CIPHER_get0_name(kekcipher);
-             goto enc;
-        }
-    }
-
-    /*
-     * Pick a cipher based on content encryption cipher. If it is DES3 use
-     * DES3 wrap otherwise use AES wrap similar to key size.
-     */
-#ifndef OPENSSL_NO_DES
-    if (EVP_CIPHER_get_type(cipher) == NID_des_ede3_cbc)
-        kekcipher_name = SN_id_smime_alg_CMS3DESwrap;
-    else
-#endif
-    if (keylen <= 16)
-        kekcipher_name = SN_id_aes128_wrap;
-    else if (keylen <= 24)
-        kekcipher_name = SN_id_aes192_wrap;
-    else
-        kekcipher_name = SN_id_aes256_wrap;
-enc:
-    fetched_kekcipher = EVP_CIPHER_fetch(ossl_cms_ctx_get0_libctx(cms_ctx),
-                                         kekcipher_name,
-                                         ossl_cms_ctx_get0_propq(cms_ctx));
-    if (fetched_kekcipher == NULL)
-        return 0;
-    ret = EVP_EncryptInit_ex(ctx, fetched_kekcipher, NULL, NULL, NULL);
-    EVP_CIPHER_free(fetched_kekcipher);
-    return ret;
-}
-
 /* Encrypt content key in key agreement recipient info */
 
 int ossl_cms_RecipientInfo_kari_encrypt(const CMS_ContentInfo *cms,
@@ -492,7 +425,7 @@ int ossl_cms_RecipientInfo_kari_encrypt(const CMS_ContentInfo *cms,
     reks = kari->recipientEncryptedKeys;
     ec = ossl_cms_get0_env_enc_content(cms);
     /* Initialise wrap algorithm parameters */
-    if (!cms_wrap_init(kari, ec->cipher))
+    if (!ossl_cms_RecipientInfo_wrap_init(ri, ec->cipher))
         return 0;
     /*
      * If no originator key set up initialise for ephemeral key the public key

crypto/cms/cms_kem.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <assert.h>
+#include <limits.h>
+#include <openssl/cms.h>
+#include <openssl/core_names.h>
+#include <openssl/err.h>
+#include <openssl/decoder.h>
+#include "internal/sizes.h"
+#include "crypto/asn1.h"
+#include "crypto/evp.h"
+#include "cms_local.h"
+
+static int kem_cms_decrypt(CMS_RecipientInfo *ri)
+{
+    uint32_t *kekLength;
+    X509_ALGOR *wrap;
+    EVP_PKEY_CTX *pctx;
+    EVP_CIPHER_CTX *kekctx;
+    uint32_t cipher_length;
+    char name[OSSL_MAX_NAME_SIZE];
+    EVP_CIPHER *kekcipher = NULL;
+    int rv = 0;
+
+    if (!ossl_cms_RecipientInfo_kemri_get0_alg(ri, &kekLength, &wrap))
+        goto err;
+
+    pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+    if (pctx == NULL)
+        goto err;
+
+    kekctx = CMS_RecipientInfo_kemri_get0_ctx(ri);
+    if (kekctx == NULL)
+        goto err;
+
+    OBJ_obj2txt(name, sizeof(name), wrap->algorithm, 0);
+    kekcipher = EVP_CIPHER_fetch(pctx->libctx, name, pctx->propquery);
+    if (kekcipher == NULL || EVP_CIPHER_get_mode(kekcipher) != EVP_CIPH_WRAP_MODE)
+        goto err;
+    if (!EVP_EncryptInit_ex(kekctx, kekcipher, NULL, NULL, NULL))
+        goto err;
+    if (EVP_CIPHER_asn1_to_param(kekctx, wrap->parameter) <= 0)
+        goto err;
+
+    cipher_length = EVP_CIPHER_CTX_get_key_length(kekctx);
+    if (cipher_length != *kekLength) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH);
+        goto err;
+    }
+
+    rv = 1;
+err:
+    EVP_CIPHER_free(kekcipher);
+    return rv;
+}
+
+static int kem_cms_encrypt(CMS_RecipientInfo *ri)
+{
+    uint32_t *kekLength;
+    X509_ALGOR *wrap;
+    X509_ALGOR *kdf;
+    EVP_PKEY_CTX *pctx;
+    EVP_PKEY *pkey;
+    int security_bits;
+    const ASN1_OBJECT *kdf_obj = NULL;
+    unsigned char kemri_x509_algor[OSSL_MAX_ALGORITHM_ID_SIZE];
+    OSSL_PARAM params[2];
+    X509_ALGOR *x509_algor = NULL;
+    EVP_CIPHER_CTX *kekctx;
+    int wrap_nid;
+    int rv = 0;
+
+    if (!ossl_cms_RecipientInfo_kemri_get0_alg(ri, &kekLength, &wrap))
+        goto err;
+
+    kdf = CMS_RecipientInfo_kemri_get0_kdf_alg(ri);
+    if (kdf == NULL)
+        goto err;
+
+    pctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
+    if (pctx == NULL)
+        goto err;
+
+    pkey = EVP_PKEY_CTX_get0_pkey(pctx);
+    if (pkey == NULL)
+        goto err;
+
+    security_bits = EVP_PKEY_get_security_bits(pkey);
+    if (security_bits == 0)
+        goto err;
+
+    X509_ALGOR_get0(&kdf_obj, NULL, NULL, kdf);
+    if (kdf_obj == NULL || OBJ_obj2nid(kdf_obj) == NID_undef) {
+        /*
+         * If the KDF OID hasn't already been set, then query the provider
+         * for a default KDF.
+         */
+        params[0] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_CMS_KEMRI_KDF_ALGORITHM,
+                                                      kemri_x509_algor, sizeof(kemri_x509_algor));
+        params[1] = OSSL_PARAM_construct_end();
+        if (!EVP_PKEY_get_params(pkey, params))
+            goto err;
+        if (OSSL_PARAM_modified(&params[0])) {
+            const unsigned char *p = kemri_x509_algor;
+
+            x509_algor = d2i_X509_ALGOR(NULL, &p, (long)params[0].return_size);
+            if (x509_algor == NULL)
+                goto err;
+            if (!X509_ALGOR_copy(kdf, x509_algor))
+                goto err;
+        } else {
+            if (!X509_ALGOR_set0(kdf, OBJ_nid2obj(NID_HKDF_SHA256), V_ASN1_UNDEF, NULL))
+                return 0;
+        }
+    }
+
+    /* Get wrap NID */
+    kekctx = CMS_RecipientInfo_kemri_get0_ctx(ri);
+    if (kekctx == NULL)
+        goto err;
+    *kekLength = EVP_CIPHER_CTX_get_key_length(kekctx);
+    wrap_nid = EVP_CIPHER_CTX_get_type(kekctx);
+
+    /* Package wrap algorithm in an AlgorithmIdentifier */
+    ASN1_OBJECT_free(wrap->algorithm);
+    ASN1_TYPE_free(wrap->parameter);
+    wrap->algorithm = OBJ_nid2obj(wrap_nid);
+    wrap->parameter = ASN1_TYPE_new();
+    if (wrap->parameter == NULL)
+        goto err;
+    if (EVP_CIPHER_param_to_asn1(kekctx, wrap->parameter) <= 0)
+        goto err;
+    if (ASN1_TYPE_get(wrap->parameter) == NID_undef) {
+        ASN1_TYPE_free(wrap->parameter);
+        wrap->parameter = NULL;
+    }
+
+    rv = 1;
+err:
+    X509_ALGOR_free(x509_algor);
+    return rv;
+}
+
+int ossl_cms_kem_envelope(CMS_RecipientInfo *ri, int decrypt)
+{
+    assert(decrypt == 0 || decrypt == 1);
+
+    if (decrypt == 1)
+        return kem_cms_decrypt(ri);
+
+    if (decrypt == 0)
+        return kem_cms_encrypt(ri);
+
+    ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
+    return 0;
+}

crypto/cms/cms_kemri.c

@@ -0,0 +1,409 @@
+/*
+ * Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/cms.h>
+#include <openssl/core_names.h>
+#include <openssl/crypto.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/kdf.h>
+#include <openssl/x509.h>
+#include "cms_local.h"
+#include "crypto/evp.h"
+#include "internal/sizes.h"
+
+/* KEM Recipient Info (KEMRI) routines */
+
+int ossl_cms_RecipientInfo_kemri_get0_alg(CMS_RecipientInfo *ri,
+                                          uint32_t **pkekLength,
+                                          X509_ALGOR **pwrap)
+{
+    if (ri->type != CMS_RECIPINFO_KEM) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEM);
+        return 0;
+    }
+    if (pkekLength)
+        *pkekLength = &ri->d.ori->d.kemri->kekLength;
+    if (pwrap)
+        *pwrap = ri->d.ori->d.kemri->wrap;
+    return 1;
+}
+
+int CMS_RecipientInfo_kemri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert)
+{
+    if (ri->type != CMS_RECIPINFO_KEM) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEM);
+        return -2;
+    }
+    return ossl_cms_SignerIdentifier_cert_cmp(ri->d.ori->d.kemri->rid, cert);
+}
+
+int CMS_RecipientInfo_kemri_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pk)
+{
+    EVP_PKEY_CTX *pctx = NULL;
+    CMS_KEMRecipientInfo *kemri;
+
+    if (ri->type != CMS_RECIPINFO_KEM) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEM);
+        return 0;
+    }
+
+    kemri = ri->d.ori->d.kemri;
+
+    EVP_PKEY_CTX_free(kemri->pctx);
+    kemri->pctx = NULL;
+
+    if (pk != NULL) {
+        pctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(kemri->cms_ctx), pk,
+                                          ossl_cms_ctx_get0_propq(kemri->cms_ctx));
+        if (pctx == NULL || EVP_PKEY_decapsulate_init(pctx, NULL) <= 0)
+            goto err;
+
+        kemri->pctx = pctx;
+    }
+
+    return 1;
+err:
+    EVP_PKEY_CTX_free(pctx);
+    return 0;
+}
+
+/* Initialise a kemri based on passed certificate and key */
+
+int ossl_cms_RecipientInfo_kemri_init(CMS_RecipientInfo *ri, X509 *recip,
+                                      EVP_PKEY *recipPubKey, unsigned int flags,
+                                      const CMS_CTX *ctx)
+{
+    CMS_OtherRecipientInfo *ori;
+    CMS_KEMRecipientInfo *kemri;
+    int idtype;
+    X509_PUBKEY *x_pubkey;
+    X509_ALGOR *x_alg;
+
+    ri->d.ori = M_ASN1_new_of(CMS_OtherRecipientInfo);
+    if (ri->d.ori == NULL)
+        return 0;
+    ri->encoded_type = CMS_RECIPINFO_OTHER;
+    ri->type = CMS_RECIPINFO_KEM;
+
+    ori = ri->d.ori;
+    ori->oriType = OBJ_nid2obj(NID_id_smime_ori_kem);
+    if (ori->oriType == NULL)
+        return 0;
+    ori->d.kemri = M_ASN1_new_of(CMS_KEMRecipientInfo);
+    if (ori->d.kemri == NULL)
+        return 0;
+
+    kemri = ori->d.kemri;
+    kemri->version = 0;
+    kemri->cms_ctx = ctx;
+
+    /*
+     * Not a typo: RecipientIdentifier and SignerIdentifier are the same
+     * structure.
+     */
+
+    idtype = (flags & CMS_USE_KEYID) ? CMS_RECIPINFO_KEYIDENTIFIER : CMS_RECIPINFO_ISSUER_SERIAL;
+    if (!ossl_cms_set1_SignerIdentifier(kemri->rid, recip, idtype, ctx))
+        return 0;
+
+    x_pubkey = X509_get_X509_PUBKEY(recip);
+    if (x_pubkey == NULL)
+        return 0;
+    if (!X509_PUBKEY_get0_param(NULL, NULL, NULL, &x_alg, x_pubkey))
+        return 0;
+    if (!X509_ALGOR_copy(kemri->kem, x_alg))
+        return 0;
+
+    kemri->pctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx),
+                                             recipPubKey,
+                                             ossl_cms_ctx_get0_propq(ctx));
+    if (kemri->pctx == NULL)
+        return 0;
+    if (EVP_PKEY_encapsulate_init(kemri->pctx, NULL) <= 0)
+        return 0;
+
+    return 1;
+}
+
+EVP_CIPHER_CTX *CMS_RecipientInfo_kemri_get0_ctx(CMS_RecipientInfo *ri)
+{
+    if (ri->type == CMS_RECIPINFO_KEM)
+        return ri->d.ori->d.kemri->ctx;
+    return NULL;
+}
+
+X509_ALGOR *CMS_RecipientInfo_kemri_get0_kdf_alg(CMS_RecipientInfo *ri)
+{
+    if (ri->type == CMS_RECIPINFO_KEM)
+        return ri->d.ori->d.kemri->kdf;
+    return NULL;
+}
+
+int CMS_RecipientInfo_kemri_set_ukm(CMS_RecipientInfo *ri,
+                                    const unsigned char *ukm,
+                                    int ukmLength)
+{
+    CMS_KEMRecipientInfo *kemri;
+
+    if (ri->type != CMS_RECIPINFO_KEM) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEM);
+        return 0;
+    }
+
+    if (ukm == NULL && ukmLength != 0) {
+        ERR_raise(ERR_LIB_CMS, ERR_R_PASSED_INVALID_ARGUMENT);
+        return 0;
+    }
+
+    kemri = ri->d.ori->d.kemri;
+
+    ASN1_OCTET_STRING_free(kemri->ukm);
+    kemri->ukm = ASN1_OCTET_STRING_new();
+    if (kemri->ukm == NULL)
+        return 0;
+    ASN1_OCTET_STRING_set(kemri->ukm, ukm, ukmLength);
+    return 1;
+}
+
+static EVP_KDF_CTX *create_kdf_ctx(CMS_KEMRecipientInfo *kemri)
+{
+    const ASN1_OBJECT *kdf_oid;
+    int ptype;
+    char kdf_alg[OSSL_MAX_NAME_SIZE];
+    EVP_KDF *kdf = NULL;
+    EVP_KDF_CTX *kctx = NULL;
+
+    /*
+     * KDFs with algorithm identifier parameters are not supported yet. To
+     * support this, EVP_KDF_CTX_set_algor_params from
+     * `doc/designs/passing-algorithmidentifier-parameters.md` needs to be
+     * implemented.
+     */
+    X509_ALGOR_get0(&kdf_oid, &ptype, NULL, kemri->kdf);
+    if (ptype != V_ASN1_UNDEF && ptype != V_ASN1_NULL) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_KDF_ALGORITHM);
+        goto err;
+    }
+    if (OBJ_obj2txt(kdf_alg, sizeof(kdf_alg), kdf_oid, 1) < 0)
+        goto err;
+
+    kdf = EVP_KDF_fetch(ossl_cms_ctx_get0_libctx(kemri->cms_ctx), kdf_alg,
+                        ossl_cms_ctx_get0_propq(kemri->cms_ctx));
+    if (kdf == NULL)
+        goto err;
+
+    kctx = EVP_KDF_CTX_new(kdf);
+err:
+    EVP_KDF_free(kdf);
+    return kctx;
+}
+
+static int kdf_derive(unsigned char *kek, size_t keklen,
+                      const unsigned char *ss, size_t sslen,
+                      CMS_KEMRecipientInfo *kemri)
+{
+    EVP_KDF_CTX *kctx = NULL;
+    OSSL_PARAM params[3];
+    unsigned char *infoder = NULL;
+    int infolen = 0;
+    int rv = 0;
+
+    infolen = CMS_CMSORIforKEMOtherInfo_encode(&infoder, kemri->wrap, kemri->ukm,
+                                               kemri->kekLength);
+    if (infolen <= 0)
+        goto err;
+
+    kctx = create_kdf_ctx(kemri);
+    if (kctx == NULL)
+        goto err;
+
+    params[0] = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY,
+                                                  (unsigned char *)ss, sslen);
+    params[1] = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO,
+                                                  (char *)infoder, infolen);
+    params[2] = OSSL_PARAM_construct_end();
+
+    if (EVP_KDF_derive(kctx, kek, keklen, params) <= 0)
+        goto err;
+
+    rv = 1;
+err:
+    OPENSSL_free(infoder);
+    EVP_KDF_CTX_free(kctx);
+
+    return rv;
+}
+
+/*
+ * Derive KEK and decrypt/encrypt with it to produce either the original CEK
+ * or the encrypted CEK.
+ */
+
+static int cms_kek_cipher(unsigned char **pout, size_t *poutlen,
+                          const unsigned char *ss, size_t sslen,
+                          const unsigned char *in, size_t inlen,
+                          CMS_KEMRecipientInfo *kemri, int enc)
+{
+    /* Key encryption key */
+    unsigned char kek[EVP_MAX_KEY_LENGTH];
+    size_t keklen = kemri->kekLength;
+    unsigned char *out = NULL;
+    int outlen = 0;
+    int rv = 0;
+
+    if (keklen > sizeof(kek)) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH);
+        goto err;
+    }
+
+    if (!kdf_derive(kek, keklen, ss, sslen, kemri))
+        goto err;
+
+    /* Set KEK in context */
+    if (!EVP_CipherInit_ex(kemri->ctx, NULL, NULL, kek, NULL, enc))
+        goto err;
+    /* obtain output length of ciphered key */
+    if (!EVP_CipherUpdate(kemri->ctx, NULL, &outlen, in, (int)inlen))
+        goto err;
+    out = OPENSSL_malloc(outlen);
+    if (out == NULL)
+        goto err;
+    if (!EVP_CipherUpdate(kemri->ctx, out, &outlen, in, (int)inlen))
+        goto err;
+    *pout = out;
+    out = NULL;
+    *poutlen = (size_t)outlen;
+
+    rv = 1;
+err:
+    OPENSSL_free(out);
+    OPENSSL_cleanse(kek, keklen);
+    EVP_CIPHER_CTX_reset(kemri->ctx);
+    EVP_PKEY_CTX_free(kemri->pctx);
+    kemri->pctx = NULL;
+    return rv;
+}
+
+/* Encrypt content key in KEM recipient info */
+
+int ossl_cms_RecipientInfo_kemri_encrypt(const CMS_ContentInfo *cms,
+                                         CMS_RecipientInfo *ri)
+{
+    CMS_KEMRecipientInfo *kemri;
+    CMS_EncryptedContentInfo *ec;
+    unsigned char *kem_ct = NULL;
+    size_t kem_ct_len;
+    unsigned char *kem_secret = NULL;
+    size_t kem_secret_len = 0;
+    unsigned char *enckey;
+    size_t enckeylen;
+    int rv = 0;
+
+    if (ri->type != CMS_RECIPINFO_KEM) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEM);
+        return 0;
+    }
+
+    kemri = ri->d.ori->d.kemri;
+
+    ec = ossl_cms_get0_env_enc_content(cms);
+    /* Initialise wrap algorithm parameters */
+    if (!ossl_cms_RecipientInfo_wrap_init(ri, ec->cipher))
+        return 0;
+
+    /* Initialise KDF algorithm */
+    if (!ossl_cms_env_asn1_ctrl(ri, 0))
+        return 0;
+
+    if (EVP_PKEY_encapsulate(kemri->pctx, NULL, &kem_ct_len, NULL, &kem_secret_len) <= 0)
+        return 0;
+    kem_ct = OPENSSL_malloc(kem_ct_len);
+    kem_secret = OPENSSL_malloc(kem_secret_len);
+    if (kem_ct == NULL || kem_secret == NULL)
+        goto err;
+
+    if (EVP_PKEY_encapsulate(kemri->pctx, kem_ct, &kem_ct_len, kem_secret, &kem_secret_len) <= 0)
+        goto err;
+
+    ASN1_STRING_set0(kemri->kemct, kem_ct, (int)kem_ct_len);
+    kem_ct = NULL;
+
+    if (!cms_kek_cipher(&enckey, &enckeylen, kem_secret, kem_secret_len, ec->key, ec->keylen,
+                        kemri, 1))
+        goto err;
+    ASN1_STRING_set0(kemri->encryptedKey, enckey, (int)enckeylen);
+
+    rv = 1;
+err:
+    OPENSSL_free(kem_ct);
+    OPENSSL_clear_free(kem_secret, kem_secret_len);
+    return rv;
+}
+
+int ossl_cms_RecipientInfo_kemri_decrypt(const CMS_ContentInfo *cms,
+                                         CMS_RecipientInfo *ri)
+{
+    CMS_KEMRecipientInfo *kemri;
+    CMS_EncryptedContentInfo *ec;
+    const unsigned char *kem_ct = NULL;
+    size_t kem_ct_len;
+    unsigned char *kem_secret = NULL;
+    size_t kem_secret_len = 0;
+    unsigned char *enckey = NULL;
+    size_t enckeylen;
+    unsigned char *cek = NULL;
+    size_t ceklen;
+    int ret = 0;
+
+    if (ri->type != CMS_RECIPINFO_KEM) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEM);
+        return 0;
+    }
+
+    kemri = ri->d.ori->d.kemri;
+
+    ec = ossl_cms_get0_env_enc_content(cms);
+
+    if (kemri->pctx == NULL) {
+        ERR_raise(ERR_LIB_CMS, CMS_R_NO_PRIVATE_KEY);
+        return 0;
+    }
+
+    /* Setup all parameters to derive KEK */
+    if (!ossl_cms_env_asn1_ctrl(ri, 1))
+        goto err;
+
+    kem_ct = ASN1_STRING_get0_data(kemri->kemct);
+    kem_ct_len = ASN1_STRING_length(kemri->kemct);
+
+    if (EVP_PKEY_decapsulate(kemri->pctx, NULL, &kem_secret_len, kem_ct, kem_ct_len) <= 0)
+        return 0;
+    kem_secret = OPENSSL_malloc(kem_secret_len);
+    if (kem_secret == NULL)
+        goto err;
+
+    if (EVP_PKEY_decapsulate(kemri->pctx, kem_secret, &kem_secret_len, kem_ct, kem_ct_len) <= 0)
+        goto err;
+
+    /* Attempt to decrypt CEK */
+    enckeylen = kemri->encryptedKey->length;
+    enckey = kemri->encryptedKey->data;
+    if (!cms_kek_cipher(&cek, &ceklen, kem_secret, kem_secret_len, enckey, enckeylen, kemri, 0))
+        goto err;
+    ec = ossl_cms_get0_env_enc_content(cms);
+    OPENSSL_clear_free(ec->key, ec->keylen);
+    ec->key = cek;
+    ec->keylen = ceklen;
+
+    ret = 1;
+err:
+    OPENSSL_clear_free(kem_secret, kem_secret_len);
+    return ret;
+}

crypto/cms/cms_local.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008-2024 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2008-2025 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -41,6 +41,7 @@ typedef struct CMS_KEKIdentifier_st CMS_KEKIdentifier;
 typedef struct CMS_KEKRecipientInfo_st CMS_KEKRecipientInfo;
 typedef struct CMS_PasswordRecipientInfo_st CMS_PasswordRecipientInfo;
 typedef struct CMS_OtherRecipientInfo_st CMS_OtherRecipientInfo;
+typedef struct CMS_KEMRecipientInfo_st CMS_KEMRecipientInfo;
 typedef struct CMS_ReceiptsFrom_st CMS_ReceiptsFrom;
 typedef struct CMS_CTX_st CMS_CTX;
 
@@ -142,7 +143,11 @@ struct CMS_EncryptedContentInfo_st {
 };
 
 struct CMS_RecipientInfo_st {
-    int type;
+    /*
+     * Type which the RecipientInfo is encoded with. OtherRecipientInfo
+     * encompasses different types, specified by 'type' below.
+     */
+    int encoded_type;
     union {
         CMS_KeyTransRecipientInfo *ktri;
         CMS_KeyAgreeRecipientInfo *kari;
@@ -150,6 +155,8 @@ struct CMS_RecipientInfo_st {
         CMS_PasswordRecipientInfo *pwri;
         CMS_OtherRecipientInfo *ori;
     } d;
+    /* internal type, including ORI types */
+    int type;
 };
 
 typedef CMS_SignerIdentifier CMS_RecipientIdentifier;
@@ -245,7 +252,29 @@ struct CMS_PasswordRecipientInfo_st {
 
 struct CMS_OtherRecipientInfo_st {
     ASN1_OBJECT *oriType;
-    ASN1_TYPE *oriValue;
+    union {
+        /* NID_id_smime_ori_kem */
+        CMS_KEMRecipientInfo *kemri;
+        /* anything else */
+        ASN1_TYPE *other;
+    } d;
+};
+
+struct CMS_KEMRecipientInfo_st {
+    int32_t version;
+    CMS_RecipientIdentifier *rid;
+    X509_ALGOR *kem;
+    ASN1_OCTET_STRING *kemct;
+    X509_ALGOR *kdf;
+    uint32_t kekLength;
+    ASN1_OCTET_STRING *ukm;
+    X509_ALGOR *wrap;
+    ASN1_OCTET_STRING *encryptedKey;
+    /* Public key context associated with current operation */
+    EVP_PKEY_CTX *pctx;
+    /* Cipher context for CEK wrapping */
+    EVP_CIPHER_CTX *ctx;
+    const CMS_CTX *cms_ctx;
 };
 
 struct CMS_DigestedData_st {
@@ -460,6 +489,7 @@ int ossl_cms_pkey_get_ri_type(EVP_PKEY *pk);
 int ossl_cms_pkey_is_ri_type_supported(EVP_PKEY *pk, int ri_type);
 
 void ossl_cms_RecipientInfos_set_cmsctx(CMS_ContentInfo *cms);
+int ossl_cms_RecipientInfo_wrap_init(CMS_RecipientInfo *ri, const EVP_CIPHER *cipher);
 
 /* KARI routines */
 int ossl_cms_RecipientInfo_kari_init(CMS_RecipientInfo *ri, X509 *recip,
@@ -470,6 +500,20 @@ int ossl_cms_RecipientInfo_kari_init(CMS_RecipientInfo *ri, X509 *recip,
 int ossl_cms_RecipientInfo_kari_encrypt(const CMS_ContentInfo *cms,
                                         CMS_RecipientInfo *ri);
 
+/* KEMRI routines */
+int ossl_cms_RecipientInfo_kemri_get0_alg(CMS_RecipientInfo *ri,
+                                          uint32_t **pkekLength,
+                                          X509_ALGOR **pwrap);
+int ossl_cms_RecipientInfo_kemri_init(CMS_RecipientInfo *ri, X509 *recip,
+                                      EVP_PKEY *recipPubKey, unsigned int flags,
+                                      const CMS_CTX *ctx);
+int ossl_cms_RecipientInfo_kemri_encrypt(const CMS_ContentInfo *cms,
+                                         CMS_RecipientInfo *ri);
+int ossl_cms_RecipientInfo_kemri_decrypt(const CMS_ContentInfo *cms,
+                                         CMS_RecipientInfo *ri);
+int CMS_CMSORIforKEMOtherInfo_encode(unsigned char **pder, X509_ALGOR *wrap,
+                                     ASN1_OCTET_STRING *ukm, int keylen);
+
 /* PWRI routines */
 int ossl_cms_RecipientInfo_pwri_crypt(const CMS_ContentInfo *cms,
                                       CMS_RecipientInfo *ri, int en_de);
@@ -486,6 +530,7 @@ int ossl_cms_dh_envelope(CMS_RecipientInfo *ri, int decrypt);
 int ossl_cms_ecdh_envelope(CMS_RecipientInfo *ri, int decrypt);
 int ossl_cms_rsa_envelope(CMS_RecipientInfo *ri, int decrypt);
 int ossl_cms_rsa_sign(CMS_SignerInfo *si, int verify);
+int ossl_cms_kem_envelope(CMS_RecipientInfo *ri, int decrypt);
 
 int ossl_cms_get1_certs_ex(CMS_ContentInfo *cms, STACK_OF(X509) **certs);
 int ossl_cms_get1_crls_ex(CMS_ContentInfo *cms, STACK_OF(X509_CRL) **crls);
@@ -496,10 +541,12 @@ DECLARE_ASN1_ITEM(CMS_EncryptedData)
 DECLARE_ASN1_ITEM(CMS_EnvelopedData)
 DECLARE_ASN1_ITEM(CMS_AuthEnvelopedData)
 DECLARE_ASN1_ITEM(CMS_KEKRecipientInfo)
+DECLARE_ASN1_ITEM(CMS_KEMRecipientInfo)
 DECLARE_ASN1_ITEM(CMS_KeyAgreeRecipientInfo)
 DECLARE_ASN1_ITEM(CMS_KeyTransRecipientInfo)
 DECLARE_ASN1_ITEM(CMS_OriginatorPublicKey)
 DECLARE_ASN1_ITEM(CMS_OtherKeyAttribute)
+DECLARE_ASN1_ITEM(CMS_OtherRecipientInfo)
 DECLARE_ASN1_ITEM(CMS_Receipt)
 DECLARE_ASN1_ITEM(CMS_ReceiptRequest)
 DECLARE_ASN1_ITEM(CMS_RecipientEncryptedKey)

crypto/cms/cms_pwri.c

@@ -138,7 +138,7 @@ CMS_RecipientInfo *CMS_add0_recipient_password(CMS_ContentInfo *cms,
         ERR_raise(ERR_LIB_CMS, ERR_R_ASN1_LIB);
         goto err;
     }
-    ri->type = CMS_RECIPINFO_PASS;
+    ri->encoded_type = ri->type = CMS_RECIPINFO_PASS;
 
     pwri = ri->d.pwri;
     pwri->cms_ctx = cms_ctx;

crypto/cms/cms_smime.c

@@ -750,6 +750,14 @@ int CMS_decrypt_set1_pkey_and_peer(CMS_ContentInfo *cms, EVP_PKEY *pk,
                 return 1;
             if (r < 0)
                 return 0;
+        } else if (ri_type == CMS_RECIPINFO_KEM) {
+            if (cert == NULL || !CMS_RecipientInfo_kemri_cert_cmp(ri, cert)) {
+                CMS_RecipientInfo_kemri_set0_pkey(ri, pk);
+                r = CMS_RecipientInfo_decrypt(cms, ri);
+                CMS_RecipientInfo_kemri_set0_pkey(ri, NULL);
+                if (cert != NULL || r > 0)
+                    return r;
+            }
         }
         /* If we have a cert, try matching RecipientInfo, else try them all */
         else if (cert == NULL || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {

crypto/dh/dh_backend.c

@@ -80,6 +80,12 @@ int ossl_dh_key_fromdata(DH *dh, const OSSL_PARAM params[], int include_private)
     if (!DH_set0_key(dh, pub_key, priv_key))
         goto err;
 
+#ifdef FIPS_MODULE
+    if (pub_key != NULL && priv_key != NULL)
+        if (ossl_dh_check_pairwise(dh) == 0)
+            return 0;
+#endif
+
     return 1;
 
  err:

crypto/err/openssl.txt

@@ -354,6 +354,7 @@ CMS_R_NEED_ONE_SIGNER:164:need one signer
 CMS_R_NOT_A_SIGNED_RECEIPT:165:not a signed receipt
 CMS_R_NOT_ENCRYPTED_DATA:122:not encrypted data
 CMS_R_NOT_KEK:123:not kek
+CMS_R_NOT_KEM:197:not kem
 CMS_R_NOT_KEY_AGREEMENT:181:not key agreement
 CMS_R_NOT_KEY_TRANSPORT:124:not key transport
 CMS_R_NOT_PWRI:177:not pwri
@@ -394,11 +395,13 @@ CMS_R_UNABLE_TO_FINALIZE_CONTEXT:147:unable to finalize context
 CMS_R_UNKNOWN_CIPHER:148:unknown cipher
 CMS_R_UNKNOWN_DIGEST_ALGORITHM:149:unknown digest algorithm
 CMS_R_UNKNOWN_ID:150:unknown id
+CMS_R_UNKNOWN_KDF_ALGORITHM:198:unknown kdf algorithm
 CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM:151:unsupported compression algorithm
 CMS_R_UNSUPPORTED_CONTENT_ENCRYPTION_ALGORITHM:194:\
 	unsupported content encryption algorithm
 CMS_R_UNSUPPORTED_CONTENT_TYPE:152:unsupported content type
 CMS_R_UNSUPPORTED_ENCRYPTION_TYPE:192:unsupported encryption type
+CMS_R_UNSUPPORTED_KDF_ALGORITHM:199:unsupported kdf algorithm
 CMS_R_UNSUPPORTED_KEK_ALGORITHM:153:unsupported kek algorithm
 CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM:179:\
 	unsupported key encryption algorithm

crypto/evp/asymcipher.c

@@ -261,10 +261,12 @@ int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
 
     cipher = ctx->op.ciph.cipher;
     desc = cipher->description != NULL ? cipher->description : "";
+    ERR_set_mark();
     ret = cipher->encrypt(ctx->op.ciph.algctx, out, outlen, (out == NULL ? 0 : *outlen), in, inlen);
-    if (ret <= 0)
+    if (ret <= 0 && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_ASYM_CIPHER_FAILURE,
                        "%s encrypt:%s", cipher->type_name, desc);
+    ERR_clear_last_mark();
     return ret;
 
  legacy:
@@ -309,10 +311,12 @@ int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
 
     cipher = ctx->op.ciph.cipher;
     desc = cipher->description != NULL ? cipher->description : "";
+    ERR_set_mark();
     ret = cipher->decrypt(ctx->op.ciph.algctx, out, outlen, (out == NULL ? 0 : *outlen), in, inlen);
-    if (ret <= 0)
+    if (ret <= 0 && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_ASYM_CIPHER_FAILURE,
                        "%s decrypt:%s", cipher->type_name, desc);
+    ERR_clear_last_mark();
 
     return ret;
 

crypto/evp/keymgmt_meth.c

@@ -460,10 +460,12 @@ void *evp_keymgmt_gen(const EVP_KEYMGMT *keymgmt, void *genctx,
         return NULL;
     }
 
+    ERR_set_mark();
     ret = keymgmt->gen(genctx, cb, cbarg);
-    if (ret == NULL)
+    if (ret == NULL && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_KEYMGMT_FAILURE,
                        "%s key generation:%s", keymgmt->type_name, desc);
+    ERR_clear_last_mark();
     return ret;
 }
 

crypto/evp/m_sigver.c

@@ -426,14 +426,20 @@ int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
         return 0;
     }
 
+    ERR_set_mark();
     ret = signature->digest_sign_update(pctx->op.sig.algctx, data, dsize);
-    if (ret <= 0)
+    if (ret <= 0 && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_SIGNATURE_FAILURE,
                        "%s digest_sign_update:%s", signature->type_name, desc);
+    ERR_clear_last_mark();
     return ret;
 
  legacy:
     if (pctx != NULL) {
+        if (pctx->pmeth == NULL) {
+            ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
+            return 0;
+        }
         /* do_sigver_init() checked that |digest_custom| is non-NULL */
         if (pctx->flag_call_digest_custom
             && !ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx))
@@ -470,10 +476,12 @@ int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
         return 0;
     }
 
+    ERR_set_mark();
     ret = signature->digest_verify_update(pctx->op.sig.algctx, data, dsize);
-    if (ret <= 0)
+    if (ret <= 0 && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_SIGNATURE_FAILURE,
                        "%s digest_verify_update:%s", signature->type_name, desc);
+    ERR_clear_last_mark();
     return ret;
 
  legacy:
@@ -523,11 +531,13 @@ int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
             pctx = dctx;
     }
 
+    ERR_set_mark();
     r = signature->digest_sign_final(pctx->op.sig.algctx, sigret, siglen,
                                      sigret == NULL ? 0 : *siglen);
-    if (!r)
+    if (!r && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_SIGNATURE_FAILURE,
                        "%s digest_sign_final:%s", signature->type_name, desc);
+    ERR_clear_last_mark();
     if (dctx == NULL && sigret != NULL)
         ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
     else
@@ -634,11 +644,13 @@ int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
 
             if (sigret != NULL)
                 ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
+            ERR_set_mark();
             ret = signature->digest_sign(pctx->op.sig.algctx, sigret, siglen,
                                          sigret == NULL ? 0 : *siglen, tbs, tbslen);
-            if (ret <= 0)
+            if (ret <= 0 && ERR_count_to_mark() == 0)
                 ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_SIGNATURE_FAILURE,
                                "%s digest_sign:%s", signature->type_name, desc);
+            ERR_clear_last_mark();
             return ret;
         }
     } else {
@@ -689,10 +701,12 @@ int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
             pctx = dctx;
     }
 
+    ERR_set_mark();
     r = signature->digest_verify_final(pctx->op.sig.algctx, sig, siglen);
-    if (!r)
+    if (!r && ERR_count_to_mark() == 0)
         ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_SIGNATURE_FAILURE,
                        "%s digest_verify_final:%s", signature->type_name, desc);
+    ERR_clear_last_mark();
     if (dctx == NULL)
         ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
     else
@@ -765,10 +779,12 @@ int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
             int ret;
 
             ctx->flags |= EVP_MD_CTX_FLAG_FINALISED;
+            ERR_set_mark();
             ret = signature->digest_verify(pctx->op.sig.algctx, sigret, siglen, tbs, tbslen);
-            if (ret <= 0)
+            if (ret <= 0 && ERR_count_to_mark() == 0)
                 ERR_raise_data(ERR_LIB_EVP, EVP_R_PROVIDER_SIGNATURE_FAILURE,
                                "%s digest_verify:%s", signature->type_name, desc);
+            ERR_clear_last_mark();
             return ret;
         }
     } else {

crypto/objects/obj_dat.c

@@ -37,13 +37,16 @@ struct added_obj_st {
     ASN1_OBJECT *obj;
 };
 
+static unsigned long added_obj_hash(const ADDED_OBJ *ca);
+static int added_obj_cmp(const ADDED_OBJ *ca, const ADDED_OBJ *cb);
+
 static LHASH_OF(ADDED_OBJ) *added = NULL;
 static CRYPTO_RWLOCK *ossl_obj_lock = NULL;
 #ifdef TSAN_REQUIRES_LOCKING
 static CRYPTO_RWLOCK *ossl_obj_nid_lock = NULL;
 #endif
 
-static CRYPTO_ONCE ossl_obj_lock_init = CRYPTO_ONCE_STATIC_INIT;
+static CRYPTO_ONCE ossl_obj_api_init = CRYPTO_ONCE_STATIC_INIT;
 
 static ossl_inline void objs_free_locks(void)
 {
@@ -55,7 +58,7 @@ static ossl_inline void objs_free_locks(void)
 #endif
 }
 
-DEFINE_RUN_ONCE_STATIC(obj_lock_initialise)
+DEFINE_RUN_ONCE_STATIC(obj_api_initialise)
 {
     ossl_obj_lock = CRYPTO_THREAD_lock_new();
     if (ossl_obj_lock == NULL)
@@ -68,40 +71,41 @@ DEFINE_RUN_ONCE_STATIC(obj_lock_initialise)
         return 0;
     }
 #endif
+    added = lh_ADDED_OBJ_new(added_obj_hash, added_obj_cmp);
+    if (added == NULL) {
+        objs_free_locks();
+        return 0;
+    }
+
     return 1;
 }
 
-static ossl_inline int ossl_init_added_lock(void)
+static ossl_inline int ossl_init_added_api(void)
 {
 #ifndef OPENSSL_NO_AUTOLOAD_CONFIG
     /* Make sure we've loaded config before checking for any "added" objects */
     OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
 #endif
-    return RUN_ONCE(&ossl_obj_lock_init, obj_lock_initialise);
+    return RUN_ONCE(&ossl_obj_api_init, obj_api_initialise);
 }
 
-static ossl_inline int ossl_obj_write_lock(int lock)
+static ossl_inline int ossl_obj_write_lock(void)
 {
-    if (!lock)
-        return 1;
-    if (!ossl_init_added_lock())
+    if (!ossl_init_added_api())
         return 0;
     return CRYPTO_THREAD_write_lock(ossl_obj_lock);
 }
 
-static ossl_inline int ossl_obj_read_lock(int lock)
+static ossl_inline int ossl_obj_read_lock(void)
 {
-    if (!lock)
-        return 1;
-    if (!ossl_init_added_lock())
+    if (!ossl_init_added_api())
         return 0;
     return CRYPTO_THREAD_read_lock(ossl_obj_lock);
 }
 
-static ossl_inline void ossl_obj_unlock(int lock)
+static ossl_inline void ossl_obj_unlock(void)
 {
-    if (lock)
-        CRYPTO_THREAD_unlock(ossl_obj_lock);
+    CRYPTO_THREAD_unlock(ossl_obj_lock);
 }
 
 static int sn_cmp(const ASN1_OBJECT *const *a, const unsigned int *b)
@@ -221,112 +225,22 @@ void ossl_obj_cleanup_int(void)
     objs_free_locks();
 }
 
-/*
- * Requires that the ossl_obj_lock be held
- * if TSAN_REQUIRES_LOCKING defined
- */
-static int obj_new_nid_unlocked(int num)
+int OBJ_new_nid(int num)
 {
     static TSAN_QUALIFIER int new_nid = NUM_NID;
 #ifdef TSAN_REQUIRES_LOCKING
     int i;
 
+    ossl_obj_write_lock();
     i = new_nid;
     new_nid += num;
-
+    ossl_obj_unlock();
     return i;
 #else
     return tsan_add(&new_nid, num);
 #endif
 }
 
-int OBJ_new_nid(int num)
-{
-#ifdef TSAN_REQUIRES_LOCKING
-    int i;
-
-    if (!ossl_obj_write_lock(1)) {
-        ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
-        return NID_undef;
-    }
-
-    i = obj_new_nid_unlocked(num);
-
-    ossl_obj_unlock(1);
-
-    return i;
-#else
-    return obj_new_nid_unlocked(num);
-#endif
-}
-
-static int ossl_obj_add_object(const ASN1_OBJECT *obj, int lock)
-{
-    ASN1_OBJECT *o = NULL;
-    ADDED_OBJ *ao[4] = { NULL, NULL, NULL, NULL }, *aop[4];
-    int i;
-
-    if ((o = OBJ_dup(obj)) == NULL)
-        return NID_undef;
-    if ((ao[ADDED_NID] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL
-            || (o->length != 0
-                && obj->data != NULL
-                && (ao[ADDED_DATA] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
-            || (o->sn != NULL
-                && (ao[ADDED_SNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
-            || (o->ln != NULL
-                && (ao[ADDED_LNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL))
-        goto err2;
-
-    if (!ossl_obj_write_lock(lock)) {
-        ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
-        goto err2;
-    }
-    if (added == NULL) {
-        added = lh_ADDED_OBJ_new(added_obj_hash, added_obj_cmp);
-        if (added == NULL) {
-            ERR_raise(ERR_LIB_OBJ, ERR_R_CRYPTO_LIB);
-            goto err;
-        }
-    }
-
-    for (i = ADDED_DATA; i <= ADDED_NID; i++) {
-        if (ao[i] != NULL) {
-            ao[i]->type = i;
-            ao[i]->obj = o;
-            aop[i] = lh_ADDED_OBJ_retrieve(added, ao[i]);
-            if (aop[i] != NULL)
-                aop[i]->type = -1;
-            (void)lh_ADDED_OBJ_insert(added, ao[i]);
-            if (lh_ADDED_OBJ_error(added)) {
-                if (aop[i] != NULL)
-                    aop[i]->type = i;
-                while (i-- > ADDED_DATA) {
-                    lh_ADDED_OBJ_delete(added, ao[i]);
-                    if (aop[i] != NULL)
-                        aop[i]->type = i;
-                }
-                ERR_raise(ERR_LIB_OBJ, ERR_R_CRYPTO_LIB);
-                goto err;
-            }
-        }
-    }
-    o->flags &=
-        ~(ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
-          ASN1_OBJECT_FLAG_DYNAMIC_DATA);
-
-    ossl_obj_unlock(lock);
-    return o->nid;
-
- err:
-    ossl_obj_unlock(lock);
- err2:
-    for (i = ADDED_DATA; i <= ADDED_NID; i++)
-        OPENSSL_free(ao[i]);
-    ASN1_OBJECT_free(o);
-    return NID_undef;
-}
-
 ASN1_OBJECT *OBJ_nid2obj(int n)
 {
     ADDED_OBJ ad, *adp = NULL;
@@ -339,13 +253,12 @@ ASN1_OBJECT *OBJ_nid2obj(int n)
     ad.type = ADDED_NID;
     ad.obj = &ob;
     ob.nid = n;
-    if (!ossl_obj_read_lock(1)) {
+    if (!ossl_obj_read_lock()) {
         ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
         return NULL;
     }
-    if (added != NULL)
-        adp = lh_ADDED_OBJ_retrieve(added, &ad);
-    ossl_obj_unlock(1);
+    adp = lh_ADDED_OBJ_retrieve(added, &ad);
+    ossl_obj_unlock();
     if (adp != NULL)
         return adp->obj;
 
@@ -383,7 +296,7 @@ static int obj_cmp(const ASN1_OBJECT *const *ap, const unsigned int *bp)
 
 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, obj);
 
-static int ossl_obj_obj2nid(const ASN1_OBJECT *a, const int lock)
+static int ossl_obj_obj2nid(const ASN1_OBJECT *a)
 {
     int nid = NID_undef;
     const unsigned int *op;
@@ -399,18 +312,16 @@ static int ossl_obj_obj2nid(const ASN1_OBJECT *a, const int lock)
     op = OBJ_bsearch_obj(&a, obj_objs, NUM_OBJ);
     if (op != NULL)
         return nid_objs[*op].nid;
-    if (!ossl_obj_read_lock(lock)) {
+    if (!ossl_obj_read_lock()) {
         ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
         return NID_undef;
     }
-    if (added != NULL) {
-        ad.type = ADDED_DATA;
-        ad.obj = (ASN1_OBJECT *)a; /* casting away const is harmless here */
-        adp = lh_ADDED_OBJ_retrieve(added, &ad);
-        if (adp != NULL)
-            nid = adp->obj->nid;
-    }
-    ossl_obj_unlock(lock);
+    ad.type = ADDED_DATA;
+    ad.obj = (ASN1_OBJECT *)a; /* casting away const is harmless here */
+    adp = lh_ADDED_OBJ_retrieve(added, &ad);
+    if (adp != NULL)
+        nid = adp->obj->nid;
+    ossl_obj_unlock();
     return nid;
 }
 
@@ -645,18 +556,16 @@ int OBJ_ln2nid(const char *s)
     op = OBJ_bsearch_ln(&oo, ln_objs, NUM_LN);
     if (op != NULL)
         return nid_objs[*op].nid;
-    if (!ossl_obj_read_lock(1)) {
+    if (!ossl_obj_read_lock()) {
         ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
         return NID_undef;
     }
-    if (added != NULL) {
-        ad.type = ADDED_LNAME;
-        ad.obj = &o;
-        adp = lh_ADDED_OBJ_retrieve(added, &ad);
-        if (adp != NULL)
-            nid = adp->obj->nid;
-    }
-    ossl_obj_unlock(1);
+    ad.type = ADDED_LNAME;
+    ad.obj = &o;
+    adp = lh_ADDED_OBJ_retrieve(added, &ad);
+    if (adp != NULL)
+        nid = adp->obj->nid;
+    ossl_obj_unlock();
     return nid;
 }
 
@@ -672,18 +581,16 @@ int OBJ_sn2nid(const char *s)
     op = OBJ_bsearch_sn(&oo, sn_objs, NUM_SN);
     if (op != NULL)
         return nid_objs[*op].nid;
-    if (!ossl_obj_read_lock(1)) {
+    if (!ossl_obj_read_lock()) {
         ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_READ_LOCK);
         return NID_undef;
     }
-    if (added != NULL) {
-        ad.type = ADDED_SNAME;
-        ad.obj = &o;
-        adp = lh_ADDED_OBJ_retrieve(added, &ad);
-        if (adp != NULL)
-            nid = adp->obj->nid;
-    }
-    ossl_obj_unlock(1);
+    ad.type = ADDED_SNAME;
+    ad.obj = &o;
+    adp = lh_ADDED_OBJ_retrieve(added, &ad);
+    if (adp != NULL)
+        nid = adp->obj->nid;
+    ossl_obj_unlock();
     return nid;
 }
 
@@ -808,20 +715,14 @@ int OBJ_create(const char *oid, const char *sn, const char *ln)
         }
     }
 
-    if (!ossl_obj_write_lock(1)) {
-        ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
-        ASN1_OBJECT_free(tmpoid);
-        return 0;
-    }
-
     /* If NID is not NID_undef then object already exists */
     if (oid != NULL
-        && ossl_obj_obj2nid(tmpoid, 0) != NID_undef) {
+        && ossl_obj_obj2nid(tmpoid) != NID_undef) {
         ERR_raise(ERR_LIB_OBJ, OBJ_R_OID_EXISTS);
         goto err;
     }
 
-    tmpoid->nid = obj_new_nid_unlocked(1);
+    tmpoid->nid = OBJ_new_nid(1);
 
     if (tmpoid->nid == NID_undef)
         goto err;
@@ -829,13 +730,14 @@ int OBJ_create(const char *oid, const char *sn, const char *ln)
     tmpoid->sn = (char *)sn;
     tmpoid->ln = (char *)ln;
 
-    ok = ossl_obj_add_object(tmpoid, 0);
+    if (OBJ_add_object(tmpoid) != NID_undef)
+        ok = 1;
+
 
     tmpoid->sn = NULL;
     tmpoid->ln = NULL;
 
  err:
-    ossl_obj_unlock(1);
     ASN1_OBJECT_free(tmpoid);
     return ok;
 }
@@ -856,10 +758,65 @@ const unsigned char *OBJ_get0_data(const ASN1_OBJECT *obj)
 
 int OBJ_add_object(const ASN1_OBJECT *obj)
 {
-    return ossl_obj_add_object(obj, 1);
+    ASN1_OBJECT *o = NULL;
+    ADDED_OBJ *ao[4] = { NULL, NULL, NULL, NULL }, *aop[4];
+    int i;
+
+    if ((o = OBJ_dup(obj)) == NULL)
+        return NID_undef;
+    if ((ao[ADDED_NID] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL
+            || (o->length != 0
+                && obj->data != NULL
+                && (ao[ADDED_DATA] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
+            || (o->sn != NULL
+                && (ao[ADDED_SNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
+            || (o->ln != NULL
+                && (ao[ADDED_LNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL))
+        goto err2;
+
+    if (!ossl_obj_write_lock()) {
+        ERR_raise(ERR_LIB_OBJ, ERR_R_UNABLE_TO_GET_WRITE_LOCK);
+        goto err2;
+    }
+
+    for (i = ADDED_DATA; i <= ADDED_NID; i++) {
+        if (ao[i] != NULL) {
+            ao[i]->type = i;
+            ao[i]->obj = o;
+            aop[i] = lh_ADDED_OBJ_retrieve(added, ao[i]);
+            if (aop[i] != NULL)
+                aop[i]->type = -1;
+            (void)lh_ADDED_OBJ_insert(added, ao[i]);
+            if (lh_ADDED_OBJ_error(added)) {
+                if (aop[i] != NULL)
+                    aop[i]->type = i;
+                while (i-- > ADDED_DATA) {
+                    lh_ADDED_OBJ_delete(added, ao[i]);
+                    if (aop[i] != NULL)
+                        aop[i]->type = i;
+                }
+                ERR_raise(ERR_LIB_OBJ, ERR_R_CRYPTO_LIB);
+                goto err;
+            }
+        }
+    }
+    o->flags &=
+        ~(ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
+          ASN1_OBJECT_FLAG_DYNAMIC_DATA);
+
+    ossl_obj_unlock();
+    return o->nid;
+
+ err:
+    ossl_obj_unlock();
+ err2:
+    for (i = ADDED_DATA; i <= ADDED_NID; i++)
+        OPENSSL_free(ao[i]);
+    ASN1_OBJECT_free(o);
+    return NID_undef;
 }
 
 int OBJ_obj2nid(const ASN1_OBJECT *a)
 {
-    return ossl_obj_obj2nid(a, 1);
+    return ossl_obj_obj2nid(a);
 }

crypto/objects/obj_dat.h

@@ -10,7 +10,7 @@
  */
 
 /* Serialized OID's */
-static const unsigned char so[9550] = {
+static const unsigned char so[9571] = {
     0x2A,0x86,0x48,0x86,0xF7,0x0D,                 /* [    0] OBJ_rsadsi */
     0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,            /* [    6] OBJ_pkcs */
     0x2A,0x86,0x48,0x86,0xF7,0x0D,0x02,0x02,       /* [   13] OBJ_md2 */
@@ -1351,9 +1351,11 @@ static const unsigned char so[9550] = {
     0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,0x09,0x10,0x03,0x1C,  /* [ 9516] OBJ_HKDF_SHA256 */
     0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,0x09,0x10,0x03,0x1D,  /* [ 9527] OBJ_HKDF_SHA384 */
     0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,0x09,0x10,0x03,0x1E,  /* [ 9538] OBJ_HKDF_SHA512 */
+    0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,0x09,0x10,0x0D,  /* [ 9549] OBJ_id_smime_ori */
+    0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,0x09,0x10,0x0D,0x03,  /* [ 9559] OBJ_id_smime_ori_kem */
 };
 
-#define NUM_NID 1499
+#define NUM_NID 1501
 static const ASN1_OBJECT nid_objs[NUM_NID] = {
     {"UNDEF", "undefined", NID_undef},
     {"rsadsi", "RSA Data Security, Inc.", NID_rsadsi, 6, &so[0]},
@@ -2854,9 +2856,11 @@ static const ASN1_OBJECT nid_objs[NUM_NID] = {
     {"id-alg-hkdf-with-sha256", "HKDF-SHA256", NID_HKDF_SHA256, 11, &so[9516]},
     {"id-alg-hkdf-with-sha384", "HKDF-SHA384", NID_HKDF_SHA384, 11, &so[9527]},
     {"id-alg-hkdf-with-sha512", "HKDF-SHA512", NID_HKDF_SHA512, 11, &so[9538]},
+    {"id-smime-ori", "id-smime-ori", NID_id_smime_ori, 10, &so[9549]},
+    {"id-smime-ori-kem", "id-smime-ori-kem", NID_id_smime_ori_kem, 11, &so[9559]},
 };
 
-#define NUM_SN 1490
+#define NUM_SN 1492
 static const unsigned int sn_objs[NUM_SN] = {
      364,    /* "AD_DVCS" */
      419,    /* "AES-128-CBC" */
@@ -3744,6 +3748,8 @@ static const unsigned int sn_objs[NUM_SN] = {
      201,    /* "id-smime-mod-ets-eSignature-97" */
      199,    /* "id-smime-mod-msg-v3" */
      198,    /* "id-smime-mod-oid" */
+    1499,    /* "id-smime-ori" */
+    1500,    /* "id-smime-ori-kem" */
      194,    /* "id-smime-spq" */
      250,    /* "id-smime-spq-ets-sqt-unotice" */
      249,    /* "id-smime-spq-ets-sqt-uri" */
@@ -4350,7 +4356,7 @@ static const unsigned int sn_objs[NUM_SN] = {
     1289,    /* "zstd" */
 };
 
-#define NUM_LN 1490
+#define NUM_LN 1492
 static const unsigned int ln_objs[NUM_LN] = {
      363,    /* "AD Time Stamping" */
      405,    /* "ANSI X9.62" */
@@ -5367,6 +5373,8 @@ static const unsigned int ln_objs[NUM_LN] = {
      201,    /* "id-smime-mod-ets-eSignature-97" */
      199,    /* "id-smime-mod-msg-v3" */
      198,    /* "id-smime-mod-oid" */
+    1499,    /* "id-smime-ori" */
+    1500,    /* "id-smime-ori-kem" */
      194,    /* "id-smime-spq" */
      250,    /* "id-smime-spq-ets-sqt-unotice" */
      249,    /* "id-smime-spq-ets-sqt-uri" */
@@ -5844,7 +5852,7 @@ static const unsigned int ln_objs[NUM_LN] = {
      125,    /* "zlib compression" */
 };
 
-#define NUM_OBJ 1347
+#define NUM_OBJ 1349
 static const unsigned int obj_objs[NUM_OBJ] = {
        0,    /* OBJ_undef                        0 */
      181,    /* OBJ_iso                          1 */
@@ -7051,6 +7059,7 @@ static const unsigned int obj_objs[NUM_OBJ] = {
      193,    /* OBJ_id_smime_cd                  1 2 840 113549 1 9 16 4 */
      194,    /* OBJ_id_smime_spq                 1 2 840 113549 1 9 16 5 */
      195,    /* OBJ_id_smime_cti                 1 2 840 113549 1 9 16 6 */
+    1499,    /* OBJ_id_smime_ori                 1 2 840 113549 1 9 16 13 */
      158,    /* OBJ_x509Certificate              1 2 840 113549 1 9 22 1 */
      159,    /* OBJ_sdsiCertificate              1 2 840 113549 1 9 22 2 */
      160,    /* OBJ_x509Crl                      1 2 840 113549 1 9 23 1 */
@@ -7169,6 +7178,7 @@ static const unsigned int obj_objs[NUM_OBJ] = {
      254,    /* OBJ_id_smime_cti_ets_proofOfSender 1 2 840 113549 1 9 16 6 4 */
      255,    /* OBJ_id_smime_cti_ets_proofOfApproval 1 2 840 113549 1 9 16 6 5 */
      256,    /* OBJ_id_smime_cti_ets_proofOfCreation 1 2 840 113549 1 9 16 6 6 */
+    1500,    /* OBJ_id_smime_ori_kem             1 2 840 113549 1 9 16 13 3 */
      150,    /* OBJ_keyBag                       1 2 840 113549 1 12 10 1 1 */
      151,    /* OBJ_pkcs8ShroudedKeyBag          1 2 840 113549 1 12 10 1 2 */
      152,    /* OBJ_certBag                      1 2 840 113549 1 12 10 1 3 */

crypto/objects/obj_mac.num

@@ -1496,3 +1496,5 @@ aes_256_cbc_hmac_sha512_etm		1495
 HKDF_SHA256		1496
 HKDF_SHA384		1497
 HKDF_SHA512		1498
+id_smime_ori		1499
+id_smime_ori_kem		1500

crypto/objects/objects.txt

@@ -251,6 +251,7 @@ SMIME 3			: id-smime-alg
 SMIME 4			: id-smime-cd
 SMIME 5			: id-smime-spq
 SMIME 6			: id-smime-cti
+SMIME 13		: id-smime-ori
 
 # S/MIME Modules
 id-smime-mod 1		: id-smime-mod-cms
@@ -355,6 +356,9 @@ id-smime-cti 4		: id-smime-cti-ets-proofOfSender
 id-smime-cti 5		: id-smime-cti-ets-proofOfApproval
 id-smime-cti 6		: id-smime-cti-ets-proofOfCreation
 
+# S/MIME OtherRecipientInfo Type Identifier
+id-smime-ori 3		: id-smime-ori-kem
+
 pkcs9 20		:			: friendlyName
 pkcs9 21		:			: localKeyID
 !Alias ms-corp 1 3 6 1 4 1 311

crypto/provider_core.c

@@ -2419,6 +2419,11 @@ static int core_pop_error_to_mark(const OSSL_CORE_HANDLE *handle)
     return ERR_pop_to_mark();
 }
 
+static int core_count_to_mark(const OSSL_CORE_HANDLE *handle)
+{
+    return ERR_count_to_mark();
+}
+
 static void core_indicator_get_callback(OPENSSL_CORE_CTX *libctx,
                                         OSSL_INDICATOR_CALLBACK **cb)
 {
@@ -2600,6 +2605,7 @@ static const OSSL_DISPATCH core_dispatch_[] = {
     { OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK,
       (void (*)(void))core_clear_last_error_mark },
     { OSSL_FUNC_CORE_POP_ERROR_TO_MARK, (void (*)(void))core_pop_error_to_mark },
+    { OSSL_FUNC_CORE_COUNT_TO_MARK, (void (*)(void))core_count_to_mark },
     { OSSL_FUNC_BIO_NEW_FILE, (void (*)(void))ossl_core_bio_new_file },
     { OSSL_FUNC_BIO_NEW_MEMBUF, (void (*)(void))ossl_core_bio_new_mem_buf },
     { OSSL_FUNC_BIO_READ_EX, (void (*)(void))ossl_core_bio_read_ex },

crypto/x509/v3_utl.c

@@ -35,6 +35,9 @@ static int ipv6_from_asc(unsigned char *v6, const char *in);
 static int ipv6_cb(const char *elem, int len, void *usr);
 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
 
+static int is_valid_uri_char(char c);
+static int is_valid_uri(const char *uri);
+
 /* Add a CONF_VALUE name value pair to stack */
 
 static int x509v3_add_len_value(const char *name, const char *value,
@@ -60,6 +63,14 @@ static int x509v3_add_len_value(const char *name, const char *value,
         ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
         goto err;
     }
+    int err_raised = 0;
+    if (!is_valid_uri(value) && strncmp(name, "URI", 3) == 0) {
+        ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_URI);
+        err_raised = 1;
+    }
+    if (err_raised) {
+        goto err;
+    }
     vtmp->section = NULL;
     vtmp->name = tname;
     vtmp->value = tvalue;
@@ -1452,3 +1463,74 @@ int ossl_bio_print_hex(BIO *out, unsigned char *buf, int len)
     OPENSSL_free(hexbuf);
     return result;
 }
+
+static int isalnum(int c)
+{
+    return ((c >= 'A' && c <= 'Z') ||
+            (c >= 'a' && c <= 'z') ||
+            (c >= '0' && c <= '9'));
+}
+
+static int is_valid_uri_char(char c)
+{
+    /* Valid characters include alphanumeric, '-', '_', '.', '~', and reserved characters */
+    switch (c) {
+        /* Unreserved characters */ 
+        case '-': case '_': case '.': case '~':
+        /* Reserved characters */ 
+        case '!': case '*': case '\'': case '(': case ')':
+        case ';': case ':': case '@': case '&': case '=':
+        case '+': case '$': case ',': case '/': case '?':
+        case '#': case '[': case ']':
+            return 1;
+        default:
+            /* Check if alphanumeric */ 
+            if (isalnum(c)) {
+                return 1;
+            }
+            return 0;
+    }  
+}
+
+static int is_valid_uri_scheme(const char *input)
+{
+    int i;
+    char c;
+   
+    /* Input may not be null and first character must be a letter */ 
+    if (input == NULL || !((input[0] >= 'A' && input[0] <= 'Z') || (input[0] >= 'a' && input[0] <= 'z'))) {
+        return 0;
+    }
+    
+    for (i = 1; input[i] != '\0'; i++) {
+        c = input[i];
+
+        if (c == ':') {
+            /* Valid scheme found */ 
+            return 1;
+        }
+            
+        /* Characters must be alphanumeric or '+', '-', '.' */ 
+        if (!isalnum(c) && c != '+' && c != '-' && c != '.') {
+            return 0;
+        } 
+    }
+    return 0;
+}
+
+static int is_valid_uri(const char *uri)
+{
+    /* Check if URI begins with a valid scheme */
+    if (!is_valid_uri_scheme(uri)) {
+        return 0;
+    } 
+ 
+    /* Check the validity of each character in the URI */
+    for (const char *p = uri; *p != '\0'; ++p) {
+        if (!is_valid_uri_char(*p)) {
+            return 0;
+        }
+    }
+    
+    return 1; /* URI is valid */
+}

crypto/x509/v3err.c

@@ -85,6 +85,7 @@ static const ERR_STRING_DATA X509V3_str_reasons[] = {
     {ERR_PACK(ERR_LIB_X509V3, 0, X509V3_R_INVALID_SAFI), "invalid safi"},
     {ERR_PACK(ERR_LIB_X509V3, 0, X509V3_R_INVALID_SECTION), "invalid section"},
     {ERR_PACK(ERR_LIB_X509V3, 0, X509V3_R_INVALID_SYNTAX), "invalid syntax"},
+    {ERR_PACK(ERR_LIB_X509V3, 0, X509V3_R_INVALID_URI), "invalid URI"},
     {ERR_PACK(ERR_LIB_X509V3, 0, X509V3_R_ISSUER_DECODE_ERROR),
      "issuer decode error"},
     {ERR_PACK(ERR_LIB_X509V3, 0, X509V3_R_MISSING_VALUE), "missing value"},

doc/man1/openssl-cms.pod.in

@@ -75,6 +75,8 @@ Encryption options:
 [B<-aes256-wrap>]
 [B<-des3-wrap>]
 [B<-debug_decrypt>]
+[B<-recip_kdf> I<kdf>]
+[B<-recip_ukm> I<ukm>]
 
 Signing options:
 
@@ -450,6 +452,19 @@ Depending on the OpenSSL build options used, B<-des3-wrap> may not be supported.
 This option sets the B<CMS_DEBUG_DECRYPT> flag. This option should be used
 with caution: see the notes section below.
 
+=item B<-recip_kdf>
+
+This option sets the KDF used to generate the key encryption key in the
+B<KEMRecipientInfo> type. Any KDF that takes B<OSSL_KDF_PARAM_KEY> and
+B<OSSL_KDF_PARAM_INFO> parameters and is otherwise fully defined by its name or
+OID can be used, for example B<HKDF-SHA256>.
+
+=item B<-recip_ukm>
+
+This option sets the B<KEMRecipientInfo> type's optional user keying material (UKM)
+in hexadecimal form. The UKM will be encoded, along with other information, into the
+B<OSSL_KDF_PARAM_INFO> parameter of the B<KEMRecipientInfo> type's KDF.
+
 =back
 
 =head2 Signing options
@@ -937,6 +952,8 @@ The B<-engine> option was deprecated in OpenSSL 3.0.
 
 The B<-digest> option was added in OpenSSL 3.2.
 
+The B<-recip_kdf> and B<-recip_ukm> options were added in OpenSSL 3.6.
+
 =head1 COPYRIGHT
 
 Copyright 2008-2025 The OpenSSL Project Authors. All Rights Reserved.

doc/man1/openssl-rehash.pod.in

@@ -133,6 +133,13 @@ By default, this command only lists each directory as it is processed.
 The path to an executable to use to generate hashes and
 fingerprints (see above).
 
+=item B<PATH>
+
+List of paths, separated by colons (or semicolons, on Windows platforms),
+where the B<openssl> executable is searched in case the path to the hash
+generating executable is not provided in the B<OPENSSL> environment variable
+or it is not usable (that is, does not exist or is not executable).
+
 =item B<SSL_CERT_DIR>
 
 Colon separated list of directories to operate on.

doc/man1/openssl-s_time.pod.in

@@ -134,6 +134,18 @@ See L<openssl(1)/TLS Version Options>.
 
 =back
 
+=head1 ENVIRONMENT
+
+=over 4
+
+=item B<SSL_CIPHER>
+
+If the B<-cipher> option is not specified, the contents of this environment
+variable are used to modify the TLSv1.2 and below cipher list sent
+by the client the same way the aforementioned option does.
+
+=back
+
 =head1 NOTES
 
 This command can be used to measure the performance of an SSL connection.

doc/man3/CMS_add1_recipient_cert.pod

@@ -30,7 +30,8 @@ The originator-related fields are relevant only in case when the keyAgreement
 method of providing of the shared key is in use.
 
 CMS_add1_recipient_cert() adds recipient B<recip> to CMS_ContentInfo enveloped
-data structure B<cms> as a KeyTransRecipientInfo structure.
+data structure B<cms> as a KeyTransRecipientInfo or KEMRecipientInfo structure,
+or as a KeyAgreeRecipientInfo structure with an ephemeral key.
 
 CMS_add0_recipient_key() adds symmetric key B<key> of length B<keylen> using
 wrapping algorithm B<nid>, identifier B<id> of length B<idlen> and optional

doc/man3/CMS_encrypt.pod

@@ -78,10 +78,12 @@ BIO_new_CMS().
 
 The recipients specified in B<certs> use a CMS KeyTransRecipientInfo info
 structure. KEKRecipientInfo is also supported using the flag B<CMS_PARTIAL>
-and CMS_add0_recipient_key().
+and CMS_add0_recipient_key(). KEMRecipientInfo is also supported using the
+flag B<CMS_PARTIAL> and CMS_add1_recipient().
 
 The parameter B<certs> may be NULL if B<CMS_PARTIAL> is set and recipients
-added later using CMS_add1_recipient_cert() or CMS_add0_recipient_key().
+are added later using CMS_add1_recipient() or CMS_add1_recipient_cert() with
+CMS_add0_recipient_key().
 
 CMS_encrypt() is similar to CMS_encrypt_ex() but uses default values
 of NULL for the library context I<libctx> and the property query I<propq>.
@@ -104,7 +106,7 @@ The B<CMS_STREAM> flag was first supported in OpenSSL 1.0.0.
 
 =head1 COPYRIGHT
 
-Copyright 2008-2020 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2008-2025 The OpenSSL Project Authors. All Rights Reserved.
 
 Licensed under the Apache License 2.0 (the "License").  You may not use
 this file except in compliance with the License.  You can obtain a copy

doc/man3/CMS_get0_RecipientInfos.pod

@@ -6,9 +6,12 @@ CMS_get0_RecipientInfos, CMS_RecipientInfo_type,
 CMS_RecipientInfo_ktri_get0_signer_id, CMS_RecipientInfo_ktri_cert_cmp,
 CMS_RecipientInfo_set0_pkey, CMS_RecipientInfo_kekri_get0_id,
 CMS_RecipientInfo_kari_set0_pkey_and_peer,
-CMS_RecipientInfo_kari_set0_pkey,
+CMS_RecipientInfo_kari_set0_pkey, CMS_RecipientInfo_kari_get0_ctx,
 CMS_RecipientInfo_kekri_id_cmp, CMS_RecipientInfo_set0_key,
-CMS_RecipientInfo_decrypt, CMS_RecipientInfo_encrypt
+CMS_RecipientInfo_kemri_cert_cmp, CMS_RecipientInfo_kemri_set0_pkey,
+CMS_RecipientInfo_kemri_get0_ctx, CMS_RecipientInfo_kemri_get0_kdf_alg,
+CMS_RecipientInfo_kemri_set_ukm, CMS_RecipientInfo_decrypt,
+CMS_RecipientInfo_encrypt
 - CMS envelopedData RecipientInfo routines
 
 =head1 SYNOPSIS
@@ -27,6 +30,7 @@ CMS_RecipientInfo_decrypt, CMS_RecipientInfo_encrypt
  int CMS_RecipientInfo_kari_set0_pkey_and_peer(CMS_RecipientInfo *ri,
                                                EVP_PKEY *pk, X509 *peer);
  int CMS_RecipientInfo_kari_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pk);
+ EVP_CIPHER_CTX *CMS_RecipientInfo_kari_get0_ctx(CMS_RecipientInfo *ri);
  int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri, X509_ALGOR **palg,
                                      ASN1_OCTET_STRING **pid,
                                      ASN1_GENERALIZEDTIME **pdate,
@@ -36,6 +40,13 @@ CMS_RecipientInfo_decrypt, CMS_RecipientInfo_encrypt
                                     const unsigned char *id, size_t idlen);
  int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri,
                                 unsigned char *key, size_t keylen);
+ int CMS_RecipientInfo_kemri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert);
+ int CMS_RecipientInfo_kemri_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pk);
+ EVP_CIPHER_CTX *CMS_RecipientInfo_kemri_get0_ctx(CMS_RecipientInfo *ri);
+ X509_ALGOR *CMS_RecipientInfo_kemri_get0_kdf_alg(CMS_RecipientInfo *ri);
+ int CMS_RecipientInfo_kemri_set_ukm(CMS_RecipientInfo *ri,
+                                     const unsigned char *ukm,
+                                     int ukmLength);
 
  int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri);
  int CMS_RecipientInfo_encrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri);
@@ -47,7 +58,8 @@ structures associated with a CMS EnvelopedData structure.
 
 CMS_RecipientInfo_type() returns the type of CMS_RecipientInfo structure B<ri>.
 It will currently return CMS_RECIPINFO_TRANS, CMS_RECIPINFO_AGREE,
-CMS_RECIPINFO_KEK, CMS_RECIPINFO_PASS, or CMS_RECIPINFO_OTHER.
+CMS_RECIPINFO_KEK, CMS_RECIPINFO_PASS, CMS_RECIPINFO_KEM, or
+CMS_RECIPINFO_OTHER.
 
 CMS_RecipientInfo_ktri_get0_signer_id() retrieves the certificate recipient
 identifier associated with a specific CMS_RecipientInfo structure B<ri>, which
@@ -69,6 +81,10 @@ must be of type CMS_RECIPINFO_AGREE.
 CMS_RecipientInfo_kari_set0_pkey() associates the private key B<pkey> with the
 CMS_RecipientInfo structure B<ri>, which must be of type CMS_RECIPINFO_AGREE.
 
+CMS_RecipientInfo_kari_get0_ctx() returns the EVP_CIPHER_CTX for the key
+encryption key, allowing the caller to specify the key wrap cipher.  The
+CMS_RecipientInfo structure B<ri> must be of type CMS_RECIPINFO_AGREE.
+
 CMS_RecipientInfo_kekri_get0_id() retrieves the key information from the
 CMS_RecipientInfo structure B<ri> which must be of type CMS_RECIPINFO_KEK.  Any
 of the remaining parameters can be NULL if the application is not interested in
@@ -88,6 +104,27 @@ CMS_RecipientInfo_set0_key() associates the symmetric key B<key> of length
 B<keylen> with the CMS_RecipientInfo structure B<ri>, which must be of type
 CMS_RECIPINFO_KEK.
 
+CMS_RecipientInfo_kemri_cert_cmp() compares the certificate B<cert> against the
+CMS_RecipientInfo structure B<ri>, which must be of type CMS_RECIPINFO_KEM.
+It returns zero if the comparison is successful and non zero if not.
+
+CMS_RecipientInfo_kemri_set0_pkey() associates the private key B<pkey> with the
+CMS_RecipientInfo structure B<ri>, which must be of type CMS_RECIPINFO_KEM.
+
+CMS_RecipientInfo_kemri_get0_ctx() returns the EVP_CIPHER_CTX for the key
+encryption key, allowing the caller to specify the key wrap cipher.  The
+CMS_RecipientInfo structure B<ri> must be of type CMS_RECIPINFO_KEM.
+
+CMS_RecipientInfo_kemri_get0_kdf_alg() returns the X509_ALGOR for the
+RecipientInfo's KDF, allowing the caller to specify the KDF algorithm.  The
+CMS_RecipientInfo structure B<ri> must be of type CMS_RECIPINFO_KEM. If the
+caller doesn't specify a KDF algorithm, B<HKDF-SHA256> will be used.
+
+CMS_RecipientInfo_kemri_set_ukm() sets the RecipientInfo's optional user
+keying material (UKM).  The UKM is encoded, along with other information, into
+the B<OSSL_KDF_PARAM_INFO> parameter of the RecipientInfo's KDF. The
+CMS_RecipientInfo structure B<ri> must be of type CMS_RECIPINFO_KEM.
+
 CMS_RecipientInfo_decrypt() attempts to decrypt CMS_RecipientInfo structure
 B<ri> in structure B<cms>. A key must have been associated with the structure
 first.
@@ -125,12 +162,20 @@ CMS_get0_RecipientInfos() returns all CMS_RecipientInfo structures, or NULL if
 an error occurs.
 
 CMS_RecipientInfo_ktri_get0_signer_id(), CMS_RecipientInfo_set0_pkey(),
-CMS_RecipientInfo_kekri_get0_id(), CMS_RecipientInfo_set0_key() and
-CMS_RecipientInfo_decrypt() return 1 for success or 0 if an error occurs.
-CMS_RecipientInfo_encrypt() return 1 for success or 0 if an error occurs.
+CMS_RecipientInfo_kekri_get0_id(), CMS_RecipientInfo_set0_key(),
+CMS_RecipientInfo_kemri_set0_pkey(), CMS_RecipientInfo_kemri_set_ukm(),
+CMS_RecipientInfo_decrypt() and CMS_RecipientInfo_encrypt() return 1 for
+success or 0 if an error occurs.
 
-CMS_RecipientInfo_ktri_cert_cmp() and CMS_RecipientInfo_kekri_cmp() return 0
-for a successful comparison and non zero otherwise.
+CMS_RecipientInfo_ktri_cert_cmp(), CMS_RecipientInfo_kemri_cert_cmp() and
+CMS_RecipientInfo_kekri_cmp() return 0 for a successful comparison and non zero
+otherwise.
+
+CMS_RecipientInfo_kemri_get0_ctx() and CMS_RecipientInfo_kari_get0_ctx return
+the RecipientInfo's EVP_CIPHER_CTX or NULL if an error occurred.
+
+CMS_RecipientInfo_kemri_get0_kdf_alg() returns the RecipientInfo's KDF's
+X509_ALGOR or NULL if an error occurred.
 
 Any error can be obtained from L<ERR_get_error(3)>.
 
@@ -143,9 +188,13 @@ L<ERR_get_error(3)>, L<CMS_decrypt(3)>
 B<CMS_RecipientInfo_kari_set0_pkey_and_peer> and B<CMS_RecipientInfo_kari_set0_pkey>
 were added in OpenSSL 3.0.
 
+B<CMS_RecipientInfo_kemri_cert_cmp>, B<CMS_RecipientInfo_kemri_set0_pkey>,
+B<CMS_RecipientInfo_kemri_get0_ctx>, B<CMS_RecipientInfo_kemri_get0_kdf_alg>
+and B<CMS_RecipientInfo_kemri_set_ukm> were added in OpenSSL 3.6.
+
 =head1 COPYRIGHT
 
-Copyright 2008-2020 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2008-2025 The OpenSSL Project Authors. All Rights Reserved.
 
 Licensed under the Apache License 2.0 (the "License").  You may not use
 this file except in compliance with the License.  You can obtain a copy

doc/man3/OPENSSL_malloc.pod

@@ -18,7 +18,8 @@ CRYPTO_get_alloc_counts,
 CRYPTO_set_mem_debug, CRYPTO_mem_ctrl,
 CRYPTO_mem_leaks, CRYPTO_mem_leaks_fp, CRYPTO_mem_leaks_cb,
 OPENSSL_MALLOC_FAILURES,
-OPENSSL_MALLOC_FD
+OPENSSL_MALLOC_FD,
+OPENSSL_MALLOC_SEED
 - Memory allocation functions
 
 =head1 SYNOPSIS
@@ -69,6 +70,7 @@ OPENSSL_MALLOC_FD
 
  env OPENSSL_MALLOC_FAILURES=... <application>
  env OPENSSL_MALLOC_FD=... <application>
+ env OPENSSL_MALLOC_SEED=... <application>
 
 The following functions have been deprecated since OpenSSL 3.0, and can be
 hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value,
@@ -155,9 +157,9 @@ with CRYPTO_set_mem_functions(), it's recommended to swap them all out
 at once.
 
 If the library is built with the C<crypto-mdebug> option, then one
-function, CRYPTO_get_alloc_counts(), and two additional environment
-variables, B<OPENSSL_MALLOC_FAILURES> and B<OPENSSL_MALLOC_FD>,
-are available.
+function, CRYPTO_get_alloc_counts(), and three additional environment
+variables, B<OPENSSL_MALLOC_FAILURES>, B<OPENSSL_MALLOC_FD>,
+and B<OPENSSL_MALLOC_SEED>, are available.
 
 The function CRYPTO_get_alloc_counts() fills in the number of times
 each of CRYPTO_malloc(), CRYPTO_realloc(), and CRYPTO_free() have been
@@ -167,12 +169,14 @@ respectively.  If a pointer is NULL, then the corresponding count is not stored.
 The variable
 B<OPENSSL_MALLOC_FAILURES> controls how often allocations should fail.
 It is a set of fields separated by semicolons, which each field is a count
-(defaulting to zero) and an optional atsign and percentage (defaulting
-to 100).  If the count is zero, then it lasts forever.  For example,
-C<100;@25> or C<100@0;0@25> means the first 100 allocations pass, then all
-other allocations (until the program exits or crashes) have a 25% chance of
-failing. The length of the value of B<OPENSSL_MALLOC_FAILURES> must be 256 or
-fewer characters.
+(defaulting to zero) and an optional atsign and percentage (interpreted
+as a floating point number that is rounded up to two decimal digits
+of precision, defaulting to 100).  If the count is zero, then it lasts forever.
+For example, C<100;@0.258> or C<100@0;0@0.258> means the first 100 allocations
+pass, then all other allocations (until the program exits or crashes) have
+a 0.26% chance of failing, with random(3) used as a source of randomness.
+The length of the value of B<OPENSSL_MALLOC_FAILURES> must be 256 or fewer
+characters.
 
 If the variable B<OPENSSL_MALLOC_FD> is parsed as a positive integer, then
 it is taken as an open file descriptor. This is used in conjunction with
@@ -188,6 +192,10 @@ work on all platforms):
   export OPENSSL_MALLOC_FD
   ...app invocation... 3>/tmp/log$$
 
+If the environment variable B<OPENSSL_MALLOC_SEED> is set, its value
+is interpreted as an integer using atoi(3) and supplied to the srandom(3)
+call for the random number generator initialisation.
+
 =head1 RETURN VALUES
 
 OPENSSL_malloc_init(), OPENSSL_free(), OPENSSL_clear_free()

doc/man3/PKCS12_gen_mac.pod

@@ -67,6 +67,28 @@ given passphrase. See L<passphrase-encoding(7)> for more information.
 
 All functions returning an integer return 1 on success and 0 if an error occurred.
 
+=head1 ENVIRONMENT
+
+=over 4
+
+=item B<LEGACY_GOST_PKCS12>
+
+=for comment
+https://tc26.ru/standarts/metodicheskie-rekomendatsii/transportnyy-klyuchevoy-konteyner.html section 5.1
+https://tc26.ru/standard/rs/%D0%A0%2050.1.112-2016.pdf section 5
+https://meganorm.ru/mega_doc/norm/prikaz/25/r_1323565_1_041-2022_rekomendatsii_po_standartizatsii.html section 7.1
+
+If this environment variable is set, MAC generation that utilises
+GOST R 34.11-94 or GOST 34.11-2012 hashing algorithms is performed the usual
+way and not in accordance with the specification provided in the methodical
+recommendation MP 26.2.002-2012 (or in its later versions, standartisation
+recommendation P 50.1.112-2016 or P 1323565.1.041-2022)
+of Technical Committee 26, that specifies that the key used for MAC
+generation should be the last 32 bytes of the 96-byte sequence generated
+by L<PKCS5_PBKDF2_HMAC(3)> and not the whole sequence.
+
+=back
+
 =head1 CONFORMING TO
 
 IETF RFC 7292 (L<https://tools.ietf.org/html/rfc7292>)

doc/man7/openssl-env.pod

@@ -6,10 +6,11 @@ openssl-env - OpenSSL environment variables
 
 =head1 DESCRIPTION
 
-The OpenSSL libraries use environment variables to override the
-compiled-in default paths for various data.
-To avoid security risks, the environment is usually not consulted when
-the executable is set-user-ID or set-group-ID.
+The OpenSSL libraries and commands use environment variables to override
+compiled-in defaults for various aspects of their behaviour.
+To avoid security risks, the environment is not consulted
+for security-sensitive environment variables when the executable
+is set-user-ID or set-group-ID.
 
 =over 4
 
@@ -18,39 +19,85 @@ the executable is set-user-ID or set-group-ID.
 Specifies the path to a certificate transparency log list.
 See L<CTLOG_STORE_new(3)>.
 
+This variable is considered a security-sensitive environment variable.
+
+=item B<HOME>, B<SYSTEMROOT>, B<USERPROFILE>
+
+Path which L<RAND_file_name(3)> uses as a directory for the random seed file
+name when the B<RANDFILE> environment variable is not set.
+B<HOME> is the only variable that is considered on Unix-like systems;
+B<USERPROFILE> and B<SYSTEMROOT> are used as fallbacks on Windows platforms.
+
+B<HOME> variable is considered a security-sensitive environment variable.
+
+=item B<HTTPS_PROXY>, B<HTTP_PROXY>, B<NO_PROXY>, B<https_proxy>, B<http_proxy>, B<no_proxy>
+
+Specify a proxy hostname.
+See L<OSSL_HTTP_parse_url(3)>.
+
+These variables are considered security-sensitive environment variables.
+
+=item B<LEGACY_GOST_PKCS12>
+
+Affects the way MAC is generated in PKCS#12 containers for GOST algorithms.
+See L<PKCS12_gen_mac(3)>.
+
+This variable is considered a security-sensitive environment variable.
+
 =item B<OPENSSL>
 
 Specifies the path to the B<openssl> executable. Used by
 the B<rehash> script (see L<openssl-rehash(1)/Script Configuration>)
 and by the B<CA.pl> script (see L<CA.pl(1)/NOTES>
 
+This variable is not considered security-sensitive.
+
 =item B<OPENSSL_CONF>, B<OPENSSL_CONF_INCLUDE>
 
 Specifies the path to a configuration file and the directory for
 included files.
 See L<config(5)>.
 
+These variables are considered security-sensitive environment variables.
+
 =item B<OPENSSL_CONFIG>
 
 Specifies a configuration option and filename for the B<req> and B<ca>
 commands invoked by the B<CA.pl> script.
 See L<CA.pl(1)>.
 
+This variable is not considered security-sensitive.
+
+=item B<OPENSSL_DEBUG_DECC_INIT>
+
+On VMS only:  if this variable is set, enables verbose output of parsing
+of C<DECC$*> logical names, that contain C RTL features, during library
+initialisation (C<LIB$INITIALIZE>).  If the value of the variable is more
+than 1, outputs information about every processed feature.
+
+This variable is not considered security-sensitive.
+
 =item B<OPENSSL_ENGINES>
 
 Specifies the directory from which dynamic engines are loaded.
 See L<openssl-engine(1)>.
 
-=item B<OPENSSL_MALLOC_FD>, B<OPENSSL_MALLOC_FAILURES>
+This variable is considered a security-sensitive environment variable.
+
+=item B<OPENSSL_MALLOC_FAILURES>, B<OPENSSL_MALLOC_FD>, B<OPENSSL_MALLOC_SEED>
 
 If built with debugging, this allows memory allocation to fail.
 See L<OPENSSL_malloc(3)>.
 
+These variables are not considered security-sensitive.
+
 =item B<OPENSSL_MODULES>
 
 Specifies the directory from which cryptographic providers are loaded.
 Equivalently, the generic B<-provider-path> command-line option may be used.
 
+This variable is considered a security-sensitive environment variable.
+
 =item B<OPENSSL_SEC_MEM>
 
 Initializes the secure memory at the beginning of the application which makes
@@ -59,12 +106,24 @@ indicates the B<size> parameter in bytes. The value can be expressed in
 binary, octal, decimal and hexadecimal. For formatting see B<strtol(3)>.
 For further restrictions see L<CRYPTO_secure_malloc_init(3)>.
 
+This variable is not considered security-sensitive.
+
 =item B<OPENSSL_SEC_MEM_MINSIZE>
 
 An optional variable used with B<OPENSSL_SEC_MEM>. The value indicates
 B<minsize> parameter in bytes. The same formatting applies as above.
 Default is 0. For more info see L<CRYPTO_secure_malloc_init(3)>.
 
+This variable is not considered security-sensitive.
+
+=item B<OPENSSL_TEST_LIBCTX>
+
+This test-only environment variable, that is recognised by the L<openssl(1)>
+command, when is set to "1", leads to creation of a nondefault library context
+by the command, for which the B<-config> option then takes effect.
+
+This variable is not considered security-sensitive.
+
 =item B<OPENSSL_TRACE>
 
 By default the OpenSSL trace feature is disabled statically.
@@ -75,58 +134,14 @@ Unless OpenSSL tracing support is generally disabled,
 enable trace output of specific parts of OpenSSL libraries, by name.
 This output usually makes sense only if you know OpenSSL internals well.
 
-The value of this environment varialble is a comma-separated list of names,
+The value of this environment variable is a comma-separated list of names,
 with the following available:
 
 =over 4
 
-=item B<TRACE>
+=item B<ALL>
 
-Traces the OpenSSL trace API itself.
-
-=item B<INIT>
-
-Traces OpenSSL library initialization and cleanup.
-
-=item B<TLS>
-
-Traces the TLS/SSL protocol.
-
-=item B<TLS_CIPHER>
-
-Traces the ciphers used by the TLS/SSL protocol.
-
-=item B<CONF>
-
-Show details about provider and engine configuration.
-
-=item B<ENGINE_TABLE>
-
-The function that is used by RSA, DSA (etc) code to select registered
-ENGINEs, cache defaults and functional references (etc), will generate
-debugging summaries.
-
-=item B<ENGINE_REF_COUNT>
-
-Reference counts in the ENGINE structure will be monitored with a line
-of generated for each change.
-
-=item B<PKCS5V2>
-
-Traces PKCS#5 v2 key generation.
-
-=item B<PKCS12_KEYGEN>
-
-Traces PKCS#12 key generation.
-
-=item B<PKCS12_DECRYPT>
-
-Traces PKCS#12 decryption.
-
-=item B<X509V3_POLICY>
-
-Generates the complete policy tree at various points during X.509 v3
-policy evaluation.
+Traces everything.
 
 =item B<BN_CTX>
 
@@ -136,9 +151,9 @@ Traces BIGNUM context operations.
 
 Traces CMP client and server activity.
 
-=item B<STORE>
+=item B<CONF>
 
-Traces STORE operations.
+Show details about provider and engine configuration.
 
 =item B<DECODER>
 
@@ -148,16 +163,81 @@ Traces decoder operations.
 
 Traces encoder operations.
 
-=item B<REF_COUNT>
+=item B<ENGINE_REF_COUNT>
 
-Traces decrementing certain ASN.1 structure references.
+Reference counts in the ENGINE structure will be monitored with a line
+of generated for each change.
+
+=item B<ENGINE_TABLE>
+
+The function that is used by RSA, DSA (etc) code to select registered
+ENGINEs, cache defaults and functional references (etc), will generate
+debugging summaries.
 
 =item B<HTTP>
 
 Traces the HTTP client and server, such as messages being sent and received.
 
+=item B<INIT>
+
+Traces OpenSSL library initialization and cleanup.
+
+=item B<PKCS12_DECRYPT>
+
+Traces PKCS#12 decryption.
+
+=item B<PKCS12_KEYGEN>
+
+Traces PKCS#12 key generation.
+
+=item B<PKCS5V2>
+
+Traces PKCS#5 v2 key generation.
+
+=item B<PROVIDER>
+
+Traces various operations that are performed on OpenSSL providers during their
+handling by the library (see L<provider(7)>), such as initialisation, tear down,
+parameter and capability retrieval, self-test, and so on.
+
+=item B<QUERY>
+
+Traces operation related to addition, removal, and fetching of methods
+in the so-called method store, that holds pointers to functions provided
+by various providers.
+
+=item B<REF_COUNT>
+
+Traces reference count changes in various structures,
+including C<BIO>, C<DH>, C<DSA>, C<EC_KEY>, C<ECX_KEY>,
+C<EVP_PKEY>, C<EVP_SKEY>, C<RSA>, C<SSL>, C<SSL_CTX>, C<SSL_SESSION>,
+C<X509_CRL>, C<X509_STORE>, C<X509>, and some others.
+
+=item B<STORE>
+
+Traces STORE operations.
+
+=item B<TLS>
+
+Traces the TLS/SSL protocol.
+
+=item B<TLS_CIPHER>
+
+Traces the ciphers used by the TLS/SSL protocol.
+
+=item B<TRACE>
+
+Traces the OpenSSL trace API itself.
+
+=item B<X509V3_POLICY>
+
+Generates the complete policy tree at various points during X.509 v3
+policy evaluation.
+
 =back
 
+This variable is not considered security-sensitive.
+
 =item B<OPENSSL_WIN32_UTF8>
 
 If set, then L<UI_OpenSSL(3)> returns UTF-8 encoded strings, rather than
@@ -166,41 +246,35 @@ the L<openssl(1)> program also transcodes the command-line parameters
 from the current code page to UTF-8.
 This environment variable is only checked on Microsoft Windows platforms.
 
+=item B<OPENSSL_armcap>, B<OPENSSL_ia32cap>, B<OPENSSL_ppccap>, B<OPENSSL_riscvcap>, B<OPENSSL_s390xcap>, B<OPENSSL_sparcv9cap>
+
+OpenSSL supports a number of different algorithm implementations for
+various machines and, by default, it determines which to use based on the
+processor capabilities and run time feature enquiry.  These environment
+variables can be used to exert more control over this selection process.
+See L<OPENSSL_ia32cap(3)>, L<OPENSSL_riscvcap(3)>, and L<OPENSSL_s390xcap(3)>.
+
+These variables are not considered security-sensitive.
+
+=item B<OSSL_QFILTER>
+
+Used to set a QUIC qlog filter specification. See L<openssl-qlog(7)>.
+
+This variable is considered a security-sensitive environment variable.
+
+=item B<QLOGDIR>
+
+Specifies a QUIC qlog output directory. See L<openssl-qlog(7)>.
+
+This variable is considered a security-sensitive environment variable.
+
 =item B<RANDFILE>
 
 The state file for the random number generator.
 This should not be needed in normal use.
 See L<RAND_load_file(3)>.
 
-=item B<SSL_CERT_DIR>, B<SSL_CERT_FILE>
-
-Specify the default directory or file containing CA certificates.
-See L<SSL_CTX_load_verify_locations(3)>.
-
-=item B<TSGET>
-
-Additional arguments for the L<tsget(1)> command.
-
-=item B<OPENSSL_ia32cap>, B<OPENSSL_sparcv9cap>, B<OPENSSL_ppccap>, B<OPENSSL_armcap>, B<OPENSSL_s390xcap>, B<OPENSSL_riscvcap>
-
-OpenSSL supports a number of different algorithm implementations for
-various machines and, by default, it determines which to use based on the
-processor capabilities and run time feature enquiry.  These environment
-variables can be used to exert more control over this selection process.
-See L<OPENSSL_ia32cap(3)>, L<OPENSSL_s390xcap(3)> and L<OPENSSL_riscvcap(3)>.
-
-=item B<NO_PROXY>, B<HTTPS_PROXY>, B<HTTP_PROXY>
-
-Specify a proxy hostname.
-See L<OSSL_HTTP_parse_url(3)>.
-
-=item B<QLOGDIR>
-
-Specifies a QUIC qlog output directory. See L<openssl-qlog(7)>.
-
-=item B<OSSL_QFILTER>
-
-Used to set a QUIC qlog filter specification. See L<openssl-qlog(7)>.
+This variable is considered a security-sensitive environment variable.
 
 =item B<SSLKEYLOGFILE>
 
@@ -214,6 +288,49 @@ the exchanged keys during an SSL session, it allows any available party with
 read access to the file to decrypt application traffic sent over that session.
 Use of this feature should be restricted to test and debug environments only.
 
+This variable is considered a security-sensitive environment variable.
+
+=item B<SSL_CERT_DIR>, B<SSL_CERT_FILE>
+
+Specify the default directory or file containing CA certificates.
+See L<SSL_CTX_load_verify_locations(3)>.
+
+These variables are considered security-sensitive environment variables,
+except in L<openssl-rehash(1)>, where B<SSL_CERT_DIR> is not considered
+security-sensitive.
+
+=item B<SSL_CIPHER>
+
+Used by L<openssl-s_time(1)> in case B<-cipher> option (that allows modifying
+TLSv1.2 and below cipher list sent by the client) is not provided,
+for specification of the aforementioned ciphers.
+
+This variable is not considered security-sensitive.
+
+=item B<TSGET>
+
+Additional arguments for the L<tsget(1)> command.
+
+This variable is not considered security-sensitive.
+
+=back
+
+=head1 HISTORY
+
+This section contains environment variables that are no longer considered
+by the OpenSSL libraries and commands.
+
+=over 4
+
+=item B<HARNESS_OSSL_PREFIX>
+
+This environment variable, existed in OpenSSL versions from 1.1.1 up to 3.5,
+allowed specification of a prefix prepended to each line sent to the I<stdout>
+by L<openssl(1)>, used by the test harness to avoid commingling the command
+under test output with the output for the TAP consumer.
+
+This variable was not considered security-sensitive.
+
 =back
 
 =head1 COPYRIGHT

doc/man7/provider-base.pod

@@ -154,6 +154,10 @@ provider):
  core_new_error                 OSSL_FUNC_CORE_NEW_ERROR
  core_set_error_debug           OSSL_FUNC_CORE_SET_ERROR_DEBUG
  core_vset_error                OSSL_FUNC_CORE_VSET_ERROR
+ core_set_error_mark            OSSL_FUNC_CORE_SET_ERROR_MARK
+ core_clear_last_error_mark     OSSL_FUNC_CORE_CLEAR_LAST_ERROR_MARK
+ core_pop_error_to_mark         OSSL_FUNC_CORE_POP_ERROR_TO_MARK
+ core_count_to_mark             OSSL_FUNC_CORE_COUNT_TO_MARK
  core_obj_add_sigid             OSSL_FUNC_CORE_OBJ_ADD_SIGID
  core_obj_create                OSSL_FUNC_CORE_OBJ_CREATE
  CRYPTO_malloc                  OSSL_FUNC_CRYPTO_MALLOC
@@ -270,6 +274,33 @@ error occurred or was reported.
 
 This corresponds to the OpenSSL function L<ERR_vset_error(3)>.
 
+=item core_set_error_mark()
+
+sets a mark on the current topmost error record if there is one.
+
+This corresponds to the OpenSSL function L<ERR_set_mark(3)>.
+
+=item core_clear_last_error_mark()
+
+removes the last mark added if there is one.
+
+This corresponds to the OpenSSL function L<ERR_clear_last_mark(3)>.
+
+=item core_pop_error_to_mark()
+
+pops the top of the error stack until a mark is found. The mark is then removed.
+If there is no mark, the whole stack is removed.
+
+This corresponds to the OpenSSL function L<ERR_pop_to_mark(3)>.
+
+=item core_count_to_mark()
+
+returns the number of entries on the error stack above the most recently
+marked entry, not including that entry. If there is no mark in the error stack,
+the number of entries in the error stack is returned.
+
+This corresponds to the OpenSSL function L<ERR_count_to_mark(3)>.
+
 =back
 
 The core_obj_create() function registers a new OID and associated short name

doc/man7/provider-keymgmt.pod

@@ -442,6 +442,30 @@ its argument I<mdname>.  This signifies that no digest has to be specified
 with the corresponding signature operation, but may be specified as an
 option.
 
+=item "ri-type" (B<OSSL_PKEY_PARAM_CMS_RI_TYPE>) <integer>
+
+The value should be the CMS RecipientInfo type for the given key, for example
+B<CMS_RECIPINFO_KEM> or B<CMS_RECIPINFO_AGREE>.
+The value that can be given through this parameter is found in
+F<< <openssl/cms.h> >>, with the macros having names starting with
+C<CMS_RECIPINFO_>.
+
+CMS will query this parameter first to determine the RecipientInfo type.  If
+this parameter is not filled in, CMS will check for known key types and map
+them to the appropriate RecipientInfo type. Otherwise, CMS will default to
+using B<CMS_RECIPINFO_TRANS>.
+
+=item "kemri-kdf-alg" (B<OSSL_PKEY_PARAM_CMS_KEMRI_KDF_ALGORITHM>) <UTF8 string>
+
+The value should be the DER-encoded X509_ALGOR for the default KDF for this key
+if it supports the KEMRecipientInfo (B<CMS_RECIPINFO_KEM>) type.
+
+Any KDF that takes B<OSSL_KDF_PARAM_KEY> and B<OSSL_KDF_PARAM_INFO> parameters
+and is otherwise fully defined by its OID can be used, for example B<HKDF-SHA256>.
+
+If B<OSSL_PKEY_PARAM_CMS_KEMRI_KDF_ALGORITHM> is not implemented, B<HKDF-SHA256>
+will be used as the default KDF.
+
 =back
 
 The OpenSSL FIPS provider also supports the following parameters:

fuzz/dtlsserver.c

@@ -590,10 +590,7 @@ int FuzzerTestOneInput(const uint8_t *buf, size_t len)
     SSL *server;
     BIO *in;
     BIO *out;
-#if !defined(OPENSSL_NO_EC)                     \
-    || (!defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0))
     BIO *bio_buf;
-#endif
     SSL_CTX *ctx;
     int ret;
 #ifndef OPENSSL_NO_DEPRECATED_3_0

fuzz/oids.txt

@@ -1347,3 +1347,5 @@ OBJ_SLH_DSA_SHAKE_256f_WITH_SHAKE256="\x60\x86\x48\x01\x65\x03\x04\x03\x2E"
 OBJ_HKDF_SHA256="\x2A\x86\x48\x86\xF7\x0D\x01\x09\x10\x03\x1C"
 OBJ_HKDF_SHA384="\x2A\x86\x48\x86\xF7\x0D\x01\x09\x10\x03\x1D"
 OBJ_HKDF_SHA512="\x2A\x86\x48\x86\xF7\x0D\x01\x09\x10\x03\x1E"
+OBJ_id_smime_ori="\x2A\x86\x48\x86\xF7\x0D\x01\x09\x10\x0D"
+OBJ_id_smime_ori_kem="\x2A\x86\x48\x86\xF7\x0D\x01\x09\x10\x0D\x03"

include/openssl/cms.h.in

@@ -70,6 +70,7 @@ CMS_ContentInfo *CMS_ContentInfo_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
 # define CMS_RECIPINFO_KEK               2
 # define CMS_RECIPINFO_PASS              3
 # define CMS_RECIPINFO_OTHER             4
+# define CMS_RECIPINFO_KEM               5
 
 /* S/MIME related flags */
 
@@ -401,6 +402,14 @@ int CMS_RecipientInfo_kari_decrypt(CMS_ContentInfo *cms,
 int CMS_SharedInfo_encode(unsigned char **pder, X509_ALGOR *kekalg,
                           ASN1_OCTET_STRING *ukm, int keylen);
 
+int CMS_RecipientInfo_kemri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert);
+int CMS_RecipientInfo_kemri_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pk);
+EVP_CIPHER_CTX *CMS_RecipientInfo_kemri_get0_ctx(CMS_RecipientInfo *ri);
+X509_ALGOR *CMS_RecipientInfo_kemri_get0_kdf_alg(CMS_RecipientInfo *ri);
+int CMS_RecipientInfo_kemri_set_ukm(CMS_RecipientInfo *ri,
+                                    const unsigned char *ukm,
+                                    int ukmLength);
+
 /* Backward compatibility for spelling errors. */
 # define CMS_R_UNKNOWN_DIGEST_ALGORITM CMS_R_UNKNOWN_DIGEST_ALGORITHM
 # define CMS_R_UNSUPPORTED_RECPIENTINFO_TYPE \

include/openssl/cmserr.h

@@ -67,6 +67,7 @@
 #  define CMS_R_NOT_A_SIGNED_RECEIPT                       165
 #  define CMS_R_NOT_ENCRYPTED_DATA                         122
 #  define CMS_R_NOT_KEK                                    123
+#  define CMS_R_NOT_KEM                                    197
 #  define CMS_R_NOT_KEY_AGREEMENT                          181
 #  define CMS_R_NOT_KEY_TRANSPORT                          124
 #  define CMS_R_NOT_PWRI                                   177
@@ -106,10 +107,12 @@
 #  define CMS_R_UNKNOWN_CIPHER                             148
 #  define CMS_R_UNKNOWN_DIGEST_ALGORITHM                   149
 #  define CMS_R_UNKNOWN_ID                                 150
+#  define CMS_R_UNKNOWN_KDF_ALGORITHM                      198
 #  define CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM          151
 #  define CMS_R_UNSUPPORTED_CONTENT_ENCRYPTION_ALGORITHM   194
 #  define CMS_R_UNSUPPORTED_CONTENT_TYPE                   152
 #  define CMS_R_UNSUPPORTED_ENCRYPTION_TYPE                192
+#  define CMS_R_UNSUPPORTED_KDF_ALGORITHM                  199
 #  define CMS_R_UNSUPPORTED_KEK_ALGORITHM                  153
 #  define CMS_R_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM       179
 #  define CMS_R_UNSUPPORTED_LABEL_SOURCE                   193

include/openssl/core_dispatch.h

@@ -253,6 +253,10 @@ OSSL_CORE_MAKE_FUNC(int, provider_up_ref,
 OSSL_CORE_MAKE_FUNC(int, provider_free,
                     (const OSSL_CORE_HANDLE *prov, int deactivate))
 
+/* Additional error functions provided by the core */
+# define OSSL_FUNC_CORE_COUNT_TO_MARK          120
+OSSL_CORE_MAKE_FUNC(int, core_count_to_mark, (const OSSL_CORE_HANDLE *prov))
+
 /* Functions provided by the provider to the Core, reserved numbers 1024-1535 */
 # define OSSL_FUNC_PROVIDER_TEARDOWN           1024
 OSSL_CORE_MAKE_FUNC(void, provider_teardown, (void *provctx))

include/openssl/obj_mac.h

@@ -778,6 +778,10 @@
 #define NID_id_smime_cti                195
 #define OBJ_id_smime_cti                OBJ_SMIME,6L
 
+#define SN_id_smime_ori         "id-smime-ori"
+#define NID_id_smime_ori                1499
+#define OBJ_id_smime_ori                OBJ_SMIME,13L
+
 #define SN_id_smime_mod_cms             "id-smime-mod-cms"
 #define NID_id_smime_mod_cms            196
 #define OBJ_id_smime_mod_cms            OBJ_id_smime_mod,1L
@@ -1113,6 +1117,10 @@
 #define NID_id_smime_cti_ets_proofOfCreation            256
 #define OBJ_id_smime_cti_ets_proofOfCreation            OBJ_id_smime_cti,6L
 
+#define SN_id_smime_ori_kem             "id-smime-ori-kem"
+#define NID_id_smime_ori_kem            1500
+#define OBJ_id_smime_ori_kem            OBJ_id_smime_ori,3L
+
 #define LN_friendlyName         "friendlyName"
 #define NID_friendlyName                156
 #define OBJ_friendlyName                OBJ_pkcs9,20L

include/openssl/x509v3err.h

@@ -64,6 +64,7 @@
 # define X509V3_R_INVALID_SAFI                            164
 # define X509V3_R_INVALID_SECTION                         135
 # define X509V3_R_INVALID_SYNTAX                          143
+# define X509V3_R_INVALID_URI                             173
 # define X509V3_R_ISSUER_DECODE_ERROR                     126
 # define X509V3_R_MISSING_VALUE                           124
 # define X509V3_R_NEED_ORGANIZATION_AND_NUMBERS           142

providers/common/der/HKDF.asn1

@@ -0,0 +1,16 @@
+-- Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+--
+-- Licensed under the Apache License 2.0 (the "License").  You may not use
+-- this file except in compliance with the License.  You can obtain a copy
+-- in the file LICENSE in the source distribution or at
+-- https://www.openssl.org/source/license.html
+
+-- -------------------------------------------------------------------
+-- Taken from https://datatracker.ietf.org/doc/rfc8619/
+
+id-smime OBJECT IDENTIFIER ::= { 1 2 840 113549 1 9 16 }
+id-alg OBJECT IDENTIFIER ::= { id-smime  3 }
+
+id-alg-hkdf-with-sha256 OBJECT IDENTIFIER ::= { id-alg 28 }
+id-alg-hkdf-with-sha384 OBJECT IDENTIFIER ::= { id-alg 29 }
+id-alg-hkdf-with-sha512 OBJECT IDENTIFIER ::= { id-alg 30 }

providers/common/der/build.info

@@ -127,9 +127,20 @@ IF[{- !$disabled{'slh-dsa'} -}]
   DEPEND[$DER_SLH_DSA_H]=oids_to_c.pm SLH_DSA.asn1
 ENDIF
 
+#----- HKDF
+$DER_HKDF_H=$INCDIR/der_hkdf.h
+$DER_HKDF_GEN=der_hkdf_gen.c
+
+GENERATE[$DER_HKDF_GEN]=der_hkdf_gen.c.in
+DEPEND[$DER_HKDF_GEN]=oids_to_c.pm HKDF.asn1
+
+DEPEND[${DER_HKDF_GEN/.c/.o}]=$DER_HKDF_H
+GENERATE[$DER_HKDF_H]=$INCDIR/der_hkdf.h.in
+DEPEND[$DER_HKDF_H]=oids_to_c.pm HKDF.asn1
+
 #----- Conclusion
 
-$COMMON= $DER_RSA_COMMON $DER_DIGESTS_GEN $DER_WRAP_GEN
+$COMMON= $DER_RSA_COMMON $DER_DIGESTS_GEN $DER_WRAP_GEN $DER_HKDF_GEN
 
 IF[{- !$disabled{dsa} -}]
   $COMMON = $COMMON $DER_DSA_GEN $DER_DSA_AUX

providers/common/der/der_hkdf_gen.c.in

@@ -0,0 +1,19 @@
+/*
+ * {- join("\n * ", @autowarntext) -}
+ *
+ * Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "prov/der_hkdf.h"
+
+/* Well known OIDs precompiled */
+{-
+    $OUT = oids_to_c::process_leaves('providers/common/der/HKDF.asn1',
+                                     { dir => $config{sourcedir},
+                                       filter => \&oids_to_c::filter_to_C });
+-}

providers/common/include/prov/der_hkdf.h.in

@@ -0,0 +1,19 @@
+/*
+ * {- join("\n * ", @autowarntext) -}
+ *
+ * Copyright 2025 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "internal/der.h"
+
+/* Well known OIDs precompiled */
+{-
+    $OUT = oids_to_c::process_leaves('providers/common/der/HKDF.asn1',
+                                     { dir => $config{sourcedir},
+                                       filter => \&oids_to_c::filter_to_H });
+-}

providers/fips/fipsprov.c

@@ -65,6 +65,7 @@ static OSSL_FUNC_core_vset_error_fn *c_vset_error;
 static OSSL_FUNC_core_set_error_mark_fn *c_set_error_mark;
 static OSSL_FUNC_core_clear_last_error_mark_fn *c_clear_last_error_mark;
 static OSSL_FUNC_core_pop_error_to_mark_fn *c_pop_error_to_mark;
+static OSSL_FUNC_core_count_to_mark_fn *c_count_to_mark;
 static OSSL_FUNC_CRYPTO_malloc_fn *c_CRYPTO_malloc;
 static OSSL_FUNC_CRYPTO_zalloc_fn *c_CRYPTO_zalloc;
 static OSSL_FUNC_CRYPTO_free_fn *c_CRYPTO_free;
@@ -834,6 +835,9 @@ int OSSL_provider_init_int(const OSSL_CORE_HANDLE *handle,
         case OSSL_FUNC_CORE_POP_ERROR_TO_MARK:
             set_func(c_pop_error_to_mark, OSSL_FUNC_core_pop_error_to_mark(in));
             break;
+        case OSSL_FUNC_CORE_COUNT_TO_MARK:
+            set_func(c_count_to_mark, OSSL_FUNC_core_count_to_mark(in));
+            break;
         case OSSL_FUNC_CRYPTO_MALLOC:
             set_func(c_CRYPTO_malloc, OSSL_FUNC_CRYPTO_malloc(in));
             break;
@@ -1072,6 +1076,11 @@ int ERR_pop_to_mark(void)
     return c_pop_error_to_mark(NULL);
 }
 
+int ERR_count_to_mark(void)
+{
+    return c_count_to_mark != NULL ? c_count_to_mark(NULL) : 0;
+}
+
 /*
  * This must take a library context, since it's called from the depths
  * of crypto/initthread.c code, where it's (correctly) assumed that the

providers/fips/self_test_data.inc

@@ -1027,38 +1027,39 @@ static const unsigned char dh_priv[] = {
     0x40, 0xb8, 0xfc, 0xe6
 };
 static const unsigned char dh_pub[] = {
-    0x95, 0xdd, 0x33, 0x8d, 0x29, 0xe5, 0x71, 0x04,
-    0x92, 0xb9, 0x18, 0x31, 0x7b, 0x72, 0xa3, 0x69,
-    0x36, 0xe1, 0x95, 0x1a, 0x2e, 0xe5, 0xa5, 0x59,
-    0x16, 0x99, 0xc0, 0x48, 0x6d, 0x0d, 0x4f, 0x9b,
-    0xdd, 0x6d, 0x5a, 0x3f, 0x6b, 0x98, 0x89, 0x0c,
-    0x62, 0xb3, 0x76, 0x52, 0xd3, 0x6e, 0x71, 0x21,
-    0x11, 0xe6, 0x8a, 0x73, 0x55, 0x37, 0x25, 0x06,
-    0x99, 0xef, 0xe3, 0x30, 0x53, 0x73, 0x91, 0xfb,
-    0xc2, 0xc5, 0x48, 0xbc, 0x5a, 0xc3, 0xe5, 0xb2,
-    0x33, 0x86, 0xc3, 0xee, 0xf5, 0xeb, 0x43, 0xc0,
-    0x99, 0xd7, 0x0a, 0x52, 0x02, 0x68, 0x7e, 0x83,
-    0x96, 0x42, 0x48, 0xfc, 0xa9, 0x1f, 0x40, 0x90,
-    0x8e, 0x8f, 0xb3, 0x31, 0x93, 0x15, 0xf6, 0xd2,
-    0x60, 0x6d, 0x7f, 0x7c, 0xd5, 0x2c, 0xc6, 0xe7,
-    0xc5, 0x84, 0x3a, 0xfb, 0x22, 0x51, 0x9c, 0xf0,
-    0xf0, 0xf9, 0xd3, 0xa0, 0xa4, 0xe8, 0xc8, 0x88,
-    0x99, 0xef, 0xed, 0xe7, 0x36, 0x43, 0x51, 0xfb,
-    0x6a, 0x36, 0x3e, 0xe7, 0x17, 0xe5, 0x44, 0x5a,
-    0xda, 0xb4, 0xc9, 0x31, 0xa6, 0x48, 0x39, 0x97,
-    0xb8, 0x7d, 0xad, 0x83, 0x67, 0x7e, 0x4d, 0x1d,
-    0x3a, 0x77, 0x75, 0xe0, 0xf6, 0xd0, 0x0f, 0xdf,
-    0x73, 0xc7, 0xad, 0x80, 0x1e, 0x66, 0x5a, 0x0e,
-    0x5a, 0x79, 0x6d, 0x0a, 0x03, 0x80, 0xa1, 0x9f,
-    0xa1, 0x82, 0xef, 0xc8, 0xa0, 0x4f, 0x5e, 0x4d,
-    0xb9, 0x0d, 0x1a, 0x86, 0x37, 0xf9, 0x5d, 0xb1,
-    0x64, 0x36, 0xbd, 0xc8, 0xf3, 0xfc, 0x09, 0x6c,
-    0x4f, 0xf7, 0xf2, 0x34, 0xbe, 0x8f, 0xef, 0x47,
-    0x9a, 0xc4, 0xb0, 0xdc, 0x4b, 0x77, 0x26, 0x3e,
-    0x07, 0xd9, 0x95, 0x9d, 0xe0, 0xf1, 0xbf, 0x3f,
-    0x0a, 0xe3, 0xd9, 0xd5, 0x0e, 0x4b, 0x89, 0xc9,
-    0x9e, 0x3e, 0xa1, 0x21, 0x73, 0x43, 0xdd, 0x8c,
-    0x65, 0x81, 0xac, 0xc4, 0x95, 0x9c, 0x91, 0xd3
+    0x00, 0x8f, 0x81, 0x67, 0x68, 0xce, 0x97, 0x99,
+    0x7e, 0x11, 0x5c, 0xad, 0x5b, 0xe1, 0x0c, 0xd4,
+    0x15, 0x44, 0xdf, 0xc2, 0x47, 0xe7, 0x06, 0x27,
+    0x5e, 0xf3, 0x9d, 0x5c, 0x4b, 0x2e, 0x35, 0x05,
+    0xfd, 0x3c, 0x8f, 0x35, 0x85, 0x1b, 0x82, 0xdd,
+    0x49, 0xc9, 0xa8, 0x7e, 0x3a, 0x5f, 0x33, 0xdc,
+    0x8f, 0x5e, 0x32, 0x76, 0xe1, 0x52, 0x1b, 0x88,
+    0x85, 0xda, 0xa9, 0x1d, 0x5f, 0x1c, 0x05, 0x3a,
+    0xd4, 0x8d, 0xbb, 0xe7, 0x46, 0x46, 0x1e, 0x29,
+    0x4b, 0x5a, 0x02, 0x88, 0x46, 0x94, 0xd0, 0x68,
+    0x7d, 0xb2, 0x9f, 0x3a, 0x3d, 0x82, 0x05, 0xe5,
+    0xa7, 0xbe, 0x6c, 0x7e, 0x24, 0x35, 0x25, 0x14,
+    0xf3, 0x45, 0x08, 0x90, 0xfc, 0x55, 0x2e, 0xa8,
+    0xb8, 0xb1, 0x89, 0x15, 0x94, 0x51, 0x44, 0xa9,
+    0x9f, 0x68, 0xcb, 0x90, 0xbc, 0xd3, 0xae, 0x02,
+    0x37, 0x26, 0xe4, 0xe9, 0x1a, 0x90, 0x95, 0x7e,
+    0x1d, 0xac, 0x0c, 0x91, 0x97, 0x83, 0x24, 0x83,
+    0xb9, 0xa1, 0x40, 0x72, 0xac, 0xf0, 0x55, 0x32,
+    0x18, 0xab, 0xb8, 0x90, 0xda, 0x13, 0x4a, 0xc8,
+    0x4b, 0x7c, 0x18, 0xbc, 0x33, 0xbf, 0x99, 0x85,
+    0x39, 0x3e, 0xc6, 0x95, 0x9b, 0x48, 0x8e, 0xbe,
+    0x46, 0x59, 0x48, 0x41, 0x0d, 0x37, 0x25, 0x94,
+    0xbe, 0x8d, 0xf5, 0x81, 0x52, 0xf6, 0xdc, 0xeb,
+    0x98, 0xd7, 0x3b, 0x44, 0x61, 0x6f, 0xa3, 0xef,
+    0x7b, 0xfe, 0xbb, 0xc2, 0x8e, 0x46, 0x63, 0xbc,
+    0x52, 0x65, 0xf9, 0xf8, 0x85, 0x41, 0xdf, 0x82,
+    0x4a, 0x10, 0x2a, 0xe3, 0x0c, 0xb7, 0xad, 0x84,
+    0xa6, 0x6f, 0x4e, 0x8e, 0x96, 0x1e, 0x04, 0xf7,
+    0x57, 0x39, 0xca, 0x58, 0xd4, 0xef, 0x5a, 0xf1,
+    0xf5, 0x69, 0xc2, 0xb1, 0x5c, 0x0a, 0xce, 0xbe,
+    0x38, 0x01, 0xb5, 0x3f, 0x07, 0x8a, 0x72, 0x90,
+    0x10, 0xac, 0x51, 0x3a, 0x96, 0x43, 0xdf, 0x6f,
+    0xea
 };
 static const unsigned char dh_peer_pub[] = {
     0x1f, 0xc1, 0xda, 0x34, 0x1d, 0x1a, 0x84, 0x6a,

providers/implementations/keymgmt/build.info

@@ -47,6 +47,7 @@ IF[{- !$disabled{'ml-kem'} -}]
     SOURCE[$TLS_ML_KEM_HYBRID_GOAL]=mlx_kmgmt.c
   ENDIF
   SOURCE[$ML_KEM_GOAL]=ml_kem_kmgmt.c
+  DEPEND[ml_kem_kmgmt.o]=../../common/include/prov/der_hkdf.h
 ENDIF
 
 SOURCE[$RSA_GOAL]=rsa_kmgmt.c

providers/implementations/keymgmt/ml_kem_kmgmt.c.in

@@ -19,9 +19,13 @@ use OpenSSL::paramnames qw(produce_param_decoder);
 #include <openssl/rand.h>
 #include <openssl/self_test.h>
 #include <openssl/param_build.h>
+#include <openssl/cms.h>
 #include "crypto/ml_kem.h"
 #include "internal/fips.h"
 #include "internal/param_build_set.h"
+#include "internal/sizes.h"
+#include "prov/der_hkdf.h"
+#include "prov/der_wrap.h"
 #include "prov/implementations.h"
 #include "prov/providercommon.h"
 #include "prov/provider_ctx.h"
@@ -494,7 +498,9 @@ static int ml_kem_import(void *vkey, int selection, const OSSL_PARAM params[])
                           ['PKEY_PARAM_PRIV_KEY',           'privkey',   'octet_string'],
                           ['PKEY_PARAM_PUB_KEY',            'pubkey',    'octet_string'],
                           ['PKEY_PARAM_ENCODED_PUBLIC_KEY', 'encpubkey', 'octet_string'],
-                         )); -}
+                          ['PKEY_PARAM_CMS_RI_TYPE',        'ri_type',   'int'],
+                          ['PKEY_PARAM_CMS_KEMRI_KDF_ALGORITHM', 'kemri_kdf_alg', 'octet_string'],
+                          )); -}
 
 static const OSSL_PARAM *ml_kem_gettable_params(void *provctx)
 {
@@ -612,6 +618,36 @@ static int ml_kem_get_params(void *vkey, OSSL_PARAM params[])
                                   &ossl_ml_kem_encode_seed))
             return 0;
     }
+
+#ifndef OPENSSL_NO_CMS
+    if (p.ri_type != NULL && !OSSL_PARAM_set_int(p.ri_type, CMS_RECIPINFO_KEM))
+        return 0;
+
+    if (p.kemri_kdf_alg != NULL) {
+        uint8_t aid_buf[OSSL_MAX_ALGORITHM_ID_SIZE];
+        int ret;
+        size_t aid_len = 0;
+        WPACKET pkt;
+        uint8_t *aid = NULL;
+
+        ret = WPACKET_init_der(&pkt, aid_buf, sizeof(aid_buf));
+        ret &= ossl_DER_w_begin_sequence(&pkt, -1)
+            && ossl_DER_w_precompiled(&pkt, -1, ossl_der_oid_id_alg_hkdf_with_sha256,
+                                      sizeof(ossl_der_oid_id_alg_hkdf_with_sha256))
+            && ossl_DER_w_end_sequence(&pkt, -1);
+        if (ret && WPACKET_finish(&pkt)) {
+            WPACKET_get_total_written(&pkt, &aid_len);
+            aid = WPACKET_get_curr(&pkt);
+        }
+        WPACKET_cleanup(&pkt);
+        if (!ret)
+            return 0;
+        if (aid != NULL && aid_len != 0 &&
+            !OSSL_PARAM_set_octet_string(p.kemri_kdf_alg, aid, aid_len))
+            return 0;
+    }
+#endif
+
     return 1;
 }
 

providers/legacyprov.c

@@ -48,6 +48,7 @@ static OSSL_FUNC_core_vset_error_fn *c_vset_error;
 static OSSL_FUNC_core_set_error_mark_fn *c_set_error_mark;
 static OSSL_FUNC_core_clear_last_error_mark_fn *c_clear_last_error_mark;
 static OSSL_FUNC_core_pop_error_to_mark_fn *c_pop_error_to_mark;
+static OSSL_FUNC_core_count_to_mark_fn *c_count_to_mark;
 #endif
 
 /* Parameters we provide to the core */
@@ -234,6 +235,9 @@ int OSSL_provider_init(const OSSL_CORE_HANDLE *handle,
         case OSSL_FUNC_CORE_POP_ERROR_TO_MARK:
             set_func(c_pop_error_to_mark, OSSL_FUNC_core_pop_error_to_mark(tmp));
             break;
+        case OSSL_FUNC_CORE_COUNT_TO_MARK:
+            set_func(c_count_to_mark, OSSL_FUNC_core_count_to_mark(in));
+            break;
         }
     }
 #endif
@@ -301,4 +305,9 @@ int ERR_pop_to_mark(void)
 {
     return c_pop_error_to_mark(NULL);
 }
+
+int ERR_count_to_mark(void)
+{
+    return c_count_to_mark != NULL ? c_count_to_mark(NULL) : 0;
+}
 #endif

test/generate_buildtest.pl

@@ -23,9 +23,19 @@ print <<"_____";
 #ifndef OPENSSL_NO_STDIO
 # include <stdio.h>
 #endif
+_____
+
+if (${name_uc} eq "RSA") {
+    print("#include <openssl/rsa.h>");
+}
+else {
+    print <<"_____";
 #ifndef OPENSSL_NO_${name_uc}
 # include <openssl/$name.h>
 #endif
+_____
+}
+print <<"_____";
 
 int main(void)
 {

test/recipes/15-test_ec.t

@@ -33,10 +33,16 @@ subtest 'EC conversions -- private key' => sub {
     tconversion( -type => 'ec', -prefix => 'ec-priv',
                  -in => srctop_file("test","testec-p256.pem") );
 };
-subtest 'EC conversions -- private key' => sub {
-    tconversion( -type => 'ec', -prefix => 'sm2-priv',
-                 -in => srctop_file("test","testec-sm2.pem") );
-};
+
+SKIP: {
+    skip "SM2 is not supported by this OpenSSL build", 1
+        if disabled("sm2");
+    subtest 'EC conversions -- private key' => sub {
+        tconversion( -type => 'ec', -prefix => 'sm2-priv',
+                     -in => srctop_file("test","testec-sm2.pem") );
+    };
+}
+
 subtest 'EC conversions -- private key PKCS#8' => sub {
     tconversion( -type => 'ec', -prefix => 'ec-pkcs8',
                  -in => srctop_file("test","testec-p256.pem"),

test/recipes/80-test_cms.t

@@ -53,7 +53,7 @@ my ($no_des, $no_dh, $no_dsa, $no_ec, $no_ec2m, $no_rc2, $no_zlib)
 
 $no_rc2 = 1 if disabled("legacy");
 
-plan tests => 31;
+plan tests => 32;
 
 ok(run(test(["pkcs7_test"])), "test pkcs7");
 
@@ -1528,3 +1528,44 @@ subtest "sign and verify with multiple keys" => sub {
        "verify both signature signatures with root");
     is(compare($smcont, $out2), 0, "compare original message with verified message");
 };
+
+subtest "ML-KEM KEMRecipientInfo tests for CMS" => sub {
+    plan tests => 5;
+
+    SKIP: {
+        skip "ML-KEM is not supported in this build", 5
+            if disabled("ml-kem") || $no_pqc;
+
+        ok(run(app(["openssl", "cms", @prov, "-encrypt", "-in", $smcont,
+                    "-out", "mlkem512.cms",
+                    "-recip", catfile($smdir, "sm_mlkem512.pem"),
+                    "-aes-256-gcm", "-keyid" ])),
+           "CMS encrypt with ML-KEM-512 and default KDF");
+
+        ok(run(app(["openssl", "cms", @prov, "-decrypt", "-in", "mlkem512.cms",
+                    "-out", "mlkem512.txt", "-recip", catfile($smdir, "sm_mlkem512.pem")]))
+           && compare_text($smcont, "mlkem512.txt") == 0,
+           "CMS decrypt with ML-KEM-512 and default KDF");
+
+        ok(run(app(["openssl", "cms", @prov, "-encrypt", "-in", $smcont,
+                    "-out", "mlkem512_mlkem768.cms",
+                    "-recip", catfile($smdir, "sm_mlkem512.pem"),
+                    "-recip_kdf", "HKDF-SHA512",
+                    "-recip", catfile($smdir, "sm_mlkem768.pem"),
+                    "-recip_ukm", "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
+                    "-aes-256-gcm", "-keyid" ])),
+           "CMS encrypt to multiple with ML-KEM and explicit KDF and UKM");
+
+        ok(run(app(["openssl", "cms", @prov, "-decrypt", "-in", "mlkem512_mlkem768.cms",
+                    "-out", "mlkem512-2.txt",
+                    "-recip", catfile($smdir, "sm_mlkem512.pem")]))
+           && compare_text($smcont, "mlkem512-2.txt") == 0,
+           "CMS decrypt with ML-KEM-512 and explicit KDF");
+
+        ok(run(app(["openssl", "cms", @prov, "-decrypt", "-in", "mlkem512_mlkem768.cms",
+                    "-out", "mlkem768-2.txt",
+                    "-recip", catfile($smdir, "sm_mlkem768.pem")]))
+           && compare_text($smcont, "mlkem768-2.txt") == 0,
+           "CMS decrypt with ML-KEM-768 and using UKM");
+    }
+};

test/recipes/95-test_external_cf_quiche_data/quiche-server.sh

@@ -24,6 +24,6 @@ test -d "$QUICHE_TARGET_PATH" || exit 1
 
 "$QUICHE_TARGET_PATH/debug/quiche-server" --cert "$SRCTOP/test/certs/servercert.pem" \
     --key "$SRCTOP/test/certs/serverkey.pem" --disable-gso \
-    --http-version HTTP/0.9 --root "$SRCTOP" --no-grease --disable-hystart &
+    --http-version HTTP/0.9 --root "$SRCTOP" --no-grease --disable-hystart > quiche_server_log 2>&1 &
 
 echo $! >server.pid

test/recipes/95-test_external_gost_engine_data/gost_engine.sh

@@ -48,7 +48,6 @@ echo "------------------------------------------------------------------"
 cmake $SRCTOP/gost-engine -DOPENSSL_ROOT_DIR="$OPENSSL_ROOT_DIR" -DOPENSSL_ENGINES_DIR="$OPENSSL_ROOT_DIR/engines"
 make
 export CTEST_OUTPUT_ON_FAILURE=1
-export HARNESS_OSSL_PREFIX=''
 export OPENSSL_ENGINES="$PWD/bin"
 export OPENSSL_APP="$O_EXE/openssl"
 make test

test/recipes/95-test_external_oqsprovider_data/oqsprovider.sh

@@ -65,7 +65,6 @@ fi
 echo "   CWD:                $PWD"
 liboqs_DIR=$SRCTOP/oqs-provider/.local cmake $SRCTOP/oqs-provider -DOPENSSL_ROOT_DIR="$OPENSSL_ROOT_DIR" -B _build && cmake --build _build
 export CTEST_OUTPUT_ON_FAILURE=1
-export HARNESS_OSSL_PREFIX=''
 export OPENSSL_APP="$O_EXE/openssl"
 export OPENSSL_MODULES=$PWD/_build/lib
 export OQS_PROVIDER_TESTSCRIPTS=$SRCTOP/oqs-provider/scripts

test/recipes/95-test_external_pkcs11_provider_data/pkcs11-provider.sh

@@ -63,9 +63,8 @@ echo "------------------------------------------------------------------"
 echo "Running tests"
 echo "------------------------------------------------------------------"
 
-# The OpenSSL app uses ${HARNESS_OSSL_PREFIX} as a prefix for its standard output
 # For maintenance reasons and simplicity we only run test with kryoptic token
-HARNESS_OSSL_PREFIX= meson test -C $PKCS11_PROVIDER_BUILDDIR --suite=kryoptic
+meson test -C $PKCS11_PROVIDER_BUILDDIR --suite=kryoptic
 
 if [ $? -ne 0 ]; then
     cat $PKCS11_PROVIDER_BUILDDIR/meson-logs/testlog.txt

test/smime-certs/ca.cnf

@@ -58,6 +58,14 @@ keyUsage = critical, digitalSignature
 basicConstraints = CA:FALSE
 keyUsage = critical, keyAgreement
 
+[ kem_cert ]
+
+# These extensions are added when 'ca' signs a request for an end-entity
+# KEM certificate, for which only key encipherment makes sense
+
+basicConstraints = CA:FALSE
+keyUsage = critical, keyEncipherment
+
 [ codesign_cert ]
 
 # These extensions are added when 'ca' signs a request for a code-signing

test/smime-certs/mksmime-certs.sh

@@ -80,3 +80,7 @@ gen sm_slhdsa_shake_128s.pem "/CN=Test SMIME EE SLH-DSA-SHAKE-128s" \
 $OPENSSL genpkey -algorithm SLH-DSA-SHAKE-256s -out sm_slhdsa_shake_256s.pem
 gen sm_slhdsa_shake_256s.pem "/CN=Test SMIME EE SLH-DSA-SHAKE-256s" \
     signer_cert >>sm_slhdsa_shake_256s.pem
+$OPENSSL genpkey -algorithm ML-KEM-512 -out sm_mlkem512.pem
+gen sm_mlkem512.pem "/CN=Test SMIME EE ML-KEM-512" kem_cert >>sm_mlkem512.pem
+$OPENSSL genpkey -algorithm ML-KEM-768 -out sm_mlkem768.pem
+gen sm_mlkem768.pem "/CN=Test SMIME EE ML-KEM-768" kem_cert >>sm_mlkem768.pem

test/smime-certs/sm_mlkem512.pem

@@ -0,0 +1,70 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
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+Pkx+jAlrq1Avdimj2rgWl5nuEteCTr3dRapgt8hTMrlfN5jfmOs/fQ==
+-----END CERTIFICATE-----

test/smime-certs/sm_mlkem768.pem

@@ -0,0 +1,94 @@
+-----BEGIN PRIVATE KEY-----
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+9Cx3xNeUrTJKodO0c/NELCTJWb3beCgoYD+GKIBvjX9ZvpMayJc+eSXL5nx0rDma
+be8=
+-----END PRIVATE KEY-----
+-----BEGIN CERTIFICATE-----
+MIIG5DCCBcygAwIBAgIUTkdeOIWbM/e6U4afCgsIGXQVSBMwDQYJKoZIhvcNAQEL
+BQAwRDELMAkGA1UEBhMCVUsxFjAUBgNVBAoMDU9wZW5TU0wgR3JvdXAxHTAbBgNV
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+EG86QJUCy7yinxZ4JNZfRGcruDAfBgNVHSMEGDAWgBQVwRMha+JVX6dqHVcg1s/z
+qXNkWTANBgkqhkiG9w0BAQsFAAOCAQEAl98fiNkFW2HGFdxBl3wyz6GfjjeQZJru
+Zi/l/xaT/6cOoCngs7zb0UHKhh/T/0KqRHVN99Z0RLqvfnH6c5wglzdPEZMf5I+/
+ceQ0DNJ5hSf852MBivp59LnYeXvL+lbGGdLTztBB408HB3zWQJkWdYAzzr3573NW
+y9c9LHbdeSy+FUiKNB3QV0vbY4JwCAtzvRc5KElwRz9Hfg32f5v+xreWjKzshW7y
+o3a6dQmthuQ4doWfZJDl2FSZHa2NAVM/UDgm9PeFlAtRHGhqEku/GK5McuVwWg+9
+WppYreBcT/hkqYWibme28kAm3XWpXHOcpOtAbkvgRE2WaPFhBkqRRA==
+-----END CERTIFICATE-----

test/sslapitest.c

@@ -1984,7 +1984,7 @@ static int test_tlsext_status_type(void)
     if (!create_ssl_ctx_pair(libctx, TLS_server_method(), TLS_client_method(),
                              TLS1_VERSION, 0,
                              &sctx, &cctx, leaf, skey))
-        return 0;
+        goto end;
     if (SSL_CTX_use_certificate_chain_file(sctx, leaf_chain) <= 0)
         goto end;
     if (SSL_CTX_get_tlsext_status_type(cctx) != -1)

util/find-doc-nits

@@ -42,11 +42,13 @@ our($opt_u);
 our($opt_v);
 our($opt_c);
 our($opt_i);
+our($opt_a);
 
 # Print usage message and exit.
 sub help {
     print <<EOF;
 Find small errors (nits) in documentation.  Options:
+    -a List undocumented env vars
     -c List undocumented commands, undocumented options and unimplemented options.
     -d Detailed list of undocumented (implies -u)
     -e Detailed list of new undocumented (implies -v)
@@ -62,7 +64,7 @@ EOF
     exit;
 }
 
-getopts('cdehlm:noiuv');
+getopts('acdehlm:noiuv');
 
 help() if $opt_h;
 $opt_u = 1 if $opt_d;
@@ -74,8 +76,8 @@ die "Cannot use both -d and -e"
 
 # We only need to check c, l, n, u and v.
 # Options d, e, o imply one of the above.
-die "Need one of -[cdehlnouv] flags.\n"
-    unless $opt_c or $opt_l or $opt_n or $opt_u or $opt_v;
+die "Need one of -[acdehlnouv] flags.\n"
+    unless $opt_a or $opt_c or $opt_l or $opt_n or $opt_u or $opt_v;
 
 
 my $temp = '/tmp/docnits.txt';
@@ -1275,6 +1277,104 @@ sub checkflags {
     }
 }
 
+sub check_env_vars {
+    # initialized with the list of "untracable" variables
+    my %env_list = ("SSL_CERT_FILE" => 1);
+    my @env_files;
+    my @except_env_files = (
+        "$config{sourcedir}/providers/implementations/keymgmt/template_kmgmt.c",
+        "$config{sourcedir}/providers/implementations/kem/template_kem.c",
+        "$config{sourcedir}/Makefile.in",
+    );
+    my @env_headers;
+    my @env_macro;
+
+    # look for source files
+    find(sub { push @env_files, $File::Find::name if /\.c$|\.in$/; },
+         $config{sourcedir});
+
+    foreach my $filename (@env_files) {
+        next if $filename =~ /test\/|demos\//
+                || grep { $_ eq $filename } @except_env_files;
+
+        open my $fh, '<', $filename or die "Can't open $filename: $!";
+        while (my $line = <$fh>) {
+            # for windows
+            # for .in files
+            $env_list{$1} = 1 if ($line =~ /GetEnvironmentVariableW\([\s\S]*"([^"]+)",/
+                || $line =~ /\$ENV\{([^}"']+)\}/);
+            # this also handles ossl_safe_getenv
+            if ($line =~ /getenv\(([^()\s]+)\)/) {
+                my $env1 = $1;
+                if ($env1 =~ /"([^"]+)"/) {
+                    $env_list{$1} = 1;
+                } elsif ($env1 =~ /([A-Z0-9_])/) {
+                    push(@env_macro, $env1);
+                }
+            }
+            # match ternary operators; $1 - true, $2 - false
+            if ($line =~ /env\(\s*[^?]+\?\s*([^:( ]+)\s*:\s*([^(]+)\s*\)/) {
+                my ($env1, $env2) = ($1, $2);
+                # if it's a string just add to the list
+                # otherwise look for the constant value later
+                if ($env1 =~ /"([^"]+)"/) {
+                    $env_list{$1} = 1;
+                } else {
+                    push(@env_macro, $env1);
+                }
+                if ($env2 =~ /"([^"]+)"/) {
+                    $env_list{$1} = 1;
+                } else {
+                    push(@env_macro, $env2);
+                }
+            }
+        }
+        close $fh;
+    }
+
+    # look for constants in header files
+    find(sub { push @env_headers, $File::Find::name if /\.h$/; },
+         $config{sourcedir});
+
+     foreach my $filename (@env_headers) {
+        open my $fh, '<', $filename or die "Can't open $filename: $!";
+        while (my $line = <$fh>) {
+            foreach my $em (@env_macro) {
+                $env_list{$1} = 1 if ($line =~ /define\s+\Q$em\E\s+"(\S+)"/);
+            }
+        }
+     }
+
+    # need to save the value before starting to delete from the hash
+    my $number_of_env = scalar keys %env_list;
+
+    # check for env vars in pod files
+    foreach ( files(TAGS => [ 'manual' ]) ) {
+        my %podinfo = extract_pod_info($_, { debug => $debug });
+        my $contents = $podinfo{contents};
+
+        # openssl-env.pod does not have ENVIRONMENT section, but the whole file
+        # is about environment variables
+        if ( $contents =~ /=head1 ENVIRONMENT(.*)=head1/ms ) {
+            $contents = $1;
+        } elsif ( $_ !~ /openssl-env.pod/ ) {
+            next;
+        }
+
+        for my $env_name (keys %env_list) {
+            delete($env_list{$env_name}) if $contents =~ $env_name;
+        }
+    }
+
+    print "Number of env vars found:".$number_of_env."\n" if $debug;
+    $number_of_env = scalar keys %env_list;
+    if ($number_of_env != 0) {
+        print "Undocumented environment variables:\n";
+        print join("\n", sort keys %env_list)."\n";
+        err("Total:".$number_of_env."\n");
+    }
+}
+
 ##
 ##  MAIN()
 ##  Do the work requested by the various getopt flags.
@@ -1373,6 +1473,10 @@ if ( $opt_n ) {
     }
 }
 
+if ( $opt_a ) {
+    check_env_vars();
+}
+
 checkstate();
 
 if ( $opt_u || $opt_v) {

util/indent.pro

@@ -123,6 +123,7 @@
 -T CMAC_CTX
 -T CMS_AuthenticatedData
 -T CMS_CertificateChoices
+-T CMS_CMSORIforKEMOtherInfo
 -T CMS_CompressedData
 -T CMS_ContentInfo
 -T CMS_DigestedData
@@ -133,6 +134,7 @@
 -T CMS_IssuerAndSerialNumber
 -T CMS_KEKIdentifier
 -T CMS_KEKRecipientInfo
+-T CMS_KEMRecipientInfo
 -T CMS_KeyAgreeRecipientIdentifier
 -T CMS_KeyAgreeRecipientInfo
 -T CMS_KeyTransRecipientInfo

util/libcrypto.num

@@ -5931,3 +5931,8 @@ i2d_PKCS8PrivateKey                     ?	3_6_0	EXIST::FUNCTION:
 OSSL_PARAM_set_octet_string_or_ptr      ?	3_6_0	EXIST::FUNCTION:
 OSSL_STORE_LOADER_settable_ctx_params   ?	3_6_0	EXIST::FUNCTION:
 X509_CRL_get0_tbs_sigalg                ?	3_6_0	EXIST::FUNCTION:
+CMS_RecipientInfo_kemri_cert_cmp        ?	3_6_0	EXIST::FUNCTION:CMS
+CMS_RecipientInfo_kemri_set0_pkey       ?	3_6_0	EXIST::FUNCTION:CMS
+CMS_RecipientInfo_kemri_get0_ctx        ?	3_6_0	EXIST::FUNCTION:CMS
+CMS_RecipientInfo_kemri_get0_kdf_alg    ?	3_6_0	EXIST::FUNCTION:CMS
+CMS_RecipientInfo_kemri_set_ukm         ?	3_6_0	EXIST::FUNCTION:CMS

util/missingcrypto.txt

@@ -290,7 +290,6 @@ CMS_RecipientEncryptedKey_get0_id(3)
 CMS_RecipientInfo_get0_pkey_ctx(3)
 CMS_RecipientInfo_kari_decrypt(3)
 CMS_RecipientInfo_kari_get0_alg(3)
-CMS_RecipientInfo_kari_get0_ctx(3)
 CMS_RecipientInfo_kari_get0_orig_id(3)
 CMS_RecipientInfo_kari_get0_reks(3)
 CMS_RecipientInfo_kari_orig_id_cmp(3)

util/other.syms

@@ -2,11 +2,15 @@
 # that don't appear in lib*.num -- because they are define's, in
 # assembly language, etc.
 #
+OPENSSL_armcap                          environment
 OPENSSL_ia32cap                         environment
-OPENSSL_s390xcap                        environment
+OPENSSL_ppccap                          environment
 OPENSSL_riscvcap                        environment
+OPENSSL_s390xcap                        environment
+OPENSSL_sparcv9cap                      environment
 OPENSSL_MALLOC_FD                       environment
 OPENSSL_MALLOC_FAILURES                 environment
+OPENSSL_MALLOC_SEED                     environment
 OPENSSL_instrument_bus                  assembler
 OPENSSL_instrument_bus2                 assembler
 #

util/perl/OpenSSL/Test.pm

@@ -465,29 +465,27 @@ sub run {
 
     $ENV{HARNESS_OSSL_LEVEL} = $level + 1;
 
+    # We prefix the output with "# " in non-capture mode by default to avoid
+    # its interpretation by the TAP consumer.
+    my $default_prefix = $opts{capture} ? "" : "# ";
+    my $pipe;
+    local $_;
+
+    open($pipe, '-|', "$prefix$cmd") or die "Can't start command: $!";
+    while(<$pipe>) {
+        my $l = ($opts{prefix} // $default_prefix) . $_;
+        if ($opts{capture}) {
+            push @r, $l;
+        } else {
+            print STDOUT $l;
+        }
+    }
+    close $pipe;
+
     # The dance we do with $? is the same dance the Unix shells appear to
     # do.  For example, a program that gets aborted (and therefore signals
     # SIGABRT = 6) will appear to exit with the code 134.  We mimic this
     # to make it easier to compare with a manual run of the command.
-    if ($opts{capture} || defined($opts{prefix})) {
-	my $pipe;
-	local $_;
-
-	open($pipe, '-|', "$prefix$cmd") or die "Can't start command: $!";
-	while(<$pipe>) {
-	    my $l = ($opts{prefix} // "") . $_;
-	    if ($opts{capture}) {
-		push @r, $l;
-	    } else {
-		print STDOUT $l;
-	    }
-	}
-	close $pipe;
-    } else {
-	$ENV{HARNESS_OSSL_PREFIX} = "# ";
-	system("$prefix$cmd");
-	delete $ENV{HARNESS_OSSL_PREFIX};
-    }
     $e = ($? & 0x7f) ? ($? & 0x7f)|0x80 : ($? >> 8);
     $r = $hooks{exit_checker}->($e);
     if ($opts{statusvar}) {

util/perl/OpenSSL/paramnames.pm

@@ -315,6 +315,8 @@ my %params = (
     'PKEY_PARAM_FIPS_KEY_CHECK' =>      "key-check",
     'PKEY_PARAM_ALGORITHM_ID' =>        '*ALG_PARAM_ALGORITHM_ID',
     'PKEY_PARAM_ALGORITHM_ID_PARAMS' => '*ALG_PARAM_ALGORITHM_ID_PARAMS',
+    'PKEY_PARAM_CMS_RI_TYPE' =>         "ri-type", # integer
+    'PKEY_PARAM_CMS_KEMRI_KDF_ALGORITHM' => "kemri-kdf-alg",
 
 # Diffie-Hellman/DSA Parameters
     'PKEY_PARAM_FFC_P' =>               "p",