blake2: update to use generated param decoders

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/28151)

providers/implementations/digests/blake2_prov.c.in

@@ -6,48 +6,56 @@
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */
+{-
+use OpenSSL::paramnames qw(produce_param_decoder);
+-}
 
+#include <string.h>
 #include <openssl/crypto.h>
 #include <openssl/core_names.h>
 #include <openssl/proverr.h>
 #include <openssl/err.h>
+#include "internal/cryptlib.h"
 #include "prov/blake2.h"
 #include "prov/digestcommon.h"
 #include "prov/implementations.h"
 
+static OSSL_FUNC_digest_gettable_ctx_params_fn blake_gettable_ctx_params;
+static OSSL_FUNC_digest_settable_ctx_params_fn blake_settable_ctx_params;
+
+{- produce_param_decoder('blake_get_ctx_params',
+                         (['DIGEST_PARAM_SIZE',     'size',   'uint'],
+                         )); -}
+
+static const OSSL_PARAM *blake_gettable_ctx_params(ossl_unused void *ctx,
+                                                   ossl_unused void *pctx)
+{
+    return blake_get_ctx_params_list;
+}
+
+{- produce_param_decoder('blake_set_ctx_params',
+                         (['DIGEST_PARAM_SIZE',     'size',   'uint'],
+                         )); -}
+
+static const OSSL_PARAM *blake_settable_ctx_params(ossl_unused void *ctx,
+                                                   ossl_unused void *pctx)
+{
+    return blake_set_ctx_params_list;
+}
+
 #define IMPLEMENT_BLAKE_functions(variant, VARIANT, variantsize) \
-static const OSSL_PARAM known_blake##variant##_ctx_params[] = { \
-    {OSSL_DIGEST_PARAM_SIZE, OSSL_PARAM_UNSIGNED_INTEGER, NULL, 0, 0}, \
-    OSSL_PARAM_END \
-}; \
- \
-const OSSL_PARAM *ossl_blake##variant##_gettable_ctx_params(ossl_unused void *ctx, \
-                                                   ossl_unused void *pctx) \
-{ \
-    return known_blake##variant##_ctx_params; \
-} \
- \
-const OSSL_PARAM *ossl_blake##variant##_settable_ctx_params(ossl_unused void *ctx, \
-                                                   ossl_unused void *pctx) \
-{ \
-    return known_blake##variant##_ctx_params; \
-} \
- \
 int ossl_blake##variant##_get_ctx_params(void *vctx, OSSL_PARAM params[]) \
 { \
     struct blake##variant##_md_data_st *mdctx = vctx; \
-    OSSL_PARAM *p; \
+    struct blake_get_ctx_params_st p; \
  \
     BLAKE##VARIANT##_CTX *ctx = &mdctx->ctx; \
  \
-    if (ctx == NULL) \
+    if (ctx == NULL || !blake_get_ctx_params_decoder(params, &p)) \
         return 0; \
-    if (ossl_param_is_empty(params)) \
-        return 1; \
  \
-    p = OSSL_PARAM_locate(params, OSSL_DIGEST_PARAM_SIZE); \
+    if (p.size != NULL \
-    if (p != NULL \
+        && !OSSL_PARAM_set_uint(p.size, (unsigned int)mdctx->params.digest_length)) { \
-        && !OSSL_PARAM_set_uint(p, (unsigned int)mdctx->params.digest_length)) { \
         ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); \
         return 0; \
     } \
@@ -57,20 +65,17 @@ int ossl_blake##variant##_get_ctx_params(void *vctx, OSSL_PARAM params[]) \
  \
 int ossl_blake##variant##_set_ctx_params(void *vctx, const OSSL_PARAM params[]) \
 { \
-    size_t size; \
+    unsigned int size; \
     struct blake##variant##_md_data_st *mdctx = vctx; \
-    const OSSL_PARAM *p; \
+    struct blake_set_ctx_params_st p; \
  \
     BLAKE##VARIANT##_CTX *ctx = &mdctx->ctx; \
  \
-    if (ctx == NULL) \
+    if (ctx == NULL || !blake_set_ctx_params_decoder(params, &p)) \
         return 0; \
-    if (ossl_param_is_empty(params)) \
-        return 1; \
  \
-    p = OSSL_PARAM_locate_const(params, OSSL_DIGEST_PARAM_SIZE); \
+    if (p.size != NULL) { \
-    if (p != NULL) { \
+        if (!OSSL_PARAM_get_uint(p.size, &size)) { \
-        if (!OSSL_PARAM_get_size_t(p, &size)) { \
             ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER); \
             return 0; \
         } \
@@ -184,9 +189,9 @@ const OSSL_DISPATCH ossl_blake##variantsize##_functions[] = { \
      (void (*)(void))ossl_digest_default_gettable_params}, \
     {OSSL_FUNC_DIGEST_INIT, (void (*)(void))blake##variantsize##_internal_init}, \
     {OSSL_FUNC_DIGEST_GETTABLE_CTX_PARAMS, \
-     (void (*)(void))ossl_blake##variant##_gettable_ctx_params}, \
+     (void (*)(void))blake_gettable_ctx_params}, \
     {OSSL_FUNC_DIGEST_SETTABLE_CTX_PARAMS, \
-     (void (*)(void))ossl_blake##variant##_settable_ctx_params}, \
+     (void (*)(void))blake_settable_ctx_params}, \
     {OSSL_FUNC_DIGEST_GET_CTX_PARAMS, \
      (void (*)(void))ossl_blake##variant##_get_ctx_params}, \
     {OSSL_FUNC_DIGEST_SET_CTX_PARAMS, \

providers/implementations/include/prov/blake2.h

@@ -101,8 +101,6 @@ int ossl_blake2b_final(unsigned char *md, BLAKE2B_CTX *c);
 
 OSSL_FUNC_digest_get_ctx_params_fn ossl_blake2b_get_ctx_params;
 OSSL_FUNC_digest_set_ctx_params_fn ossl_blake2b_set_ctx_params;
-OSSL_FUNC_digest_gettable_ctx_params_fn ossl_blake2b_gettable_ctx_params;
-OSSL_FUNC_digest_settable_ctx_params_fn ossl_blake2b_settable_ctx_params;
 
 /*
  * These setters are internal and do not check the validity of their parameters.
@@ -132,7 +130,5 @@ void ossl_blake2s_param_set_salt(BLAKE2S_PARAM *P, const uint8_t *salt,
 
 OSSL_FUNC_digest_get_ctx_params_fn ossl_blake2s_get_ctx_params;
 OSSL_FUNC_digest_set_ctx_params_fn ossl_blake2s_set_ctx_params;
-OSSL_FUNC_digest_gettable_ctx_params_fn ossl_blake2s_gettable_ctx_params;
-OSSL_FUNC_digest_settable_ctx_params_fn ossl_blake2s_settable_ctx_params;
 
 #endif /* OSSL_PROV_BLAKE2_H */