mirror of https://github.com/openssl/openssl.git
347 lines
9.9 KiB
C
347 lines
9.9 KiB
C
/*
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* Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/deprecated.h"
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#include <openssl/core_names.h>
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#include <openssl/params.h>
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#include <openssl/err.h>
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#include <openssl/dh.h>
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#include "crypto/dh.h"
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#include "crypto/evp.h"
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static int dh_paramgen_check(EVP_PKEY_CTX *ctx)
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{
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if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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/* If key type not DH return error */
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if (evp_pkey_ctx_is_legacy(ctx)
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&& ctx->pmeth->pkey_id != EVP_PKEY_DH
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&& ctx->pmeth->pkey_id != EVP_PKEY_DHX)
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return -1;
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return 1;
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}
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static int dh_param_derive_check(EVP_PKEY_CTX *ctx)
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{
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if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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/* If key type not DH return error */
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if (evp_pkey_ctx_is_legacy(ctx)
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&& ctx->pmeth->pkey_id != EVP_PKEY_DH
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&& ctx->pmeth->pkey_id != EVP_PKEY_DHX)
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return -1;
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return 1;
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}
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int EVP_PKEY_CTX_set_dh_paramgen_gindex(EVP_PKEY_CTX *ctx, int gindex)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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if ((ret = dh_paramgen_check(ctx)) <= 0)
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return ret;
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*p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_FFC_GINDEX, &gindex);
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*p = OSSL_PARAM_construct_end();
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return evp_pkey_ctx_set_params_strict(ctx, params);
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}
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int EVP_PKEY_CTX_set_dh_paramgen_seed(EVP_PKEY_CTX *ctx,
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const unsigned char *seed,
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size_t seedlen)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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if ((ret = dh_paramgen_check(ctx)) <= 0)
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return ret;
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_FFC_SEED,
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(void *)seed, seedlen);
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*p = OSSL_PARAM_construct_end();
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return evp_pkey_ctx_set_params_strict(ctx, params);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_dh_paramgen_type(EVP_PKEY_CTX *ctx, int typ)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
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EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL);
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}
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int EVP_PKEY_CTX_set_dh_paramgen_prime_len(EVP_PKEY_CTX *ctx, int pbits)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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size_t bits = pbits;
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if ((ret = dh_paramgen_check(ctx)) <= 0)
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return ret;
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*p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_PBITS, &bits);
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*p = OSSL_PARAM_construct_end();
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return evp_pkey_ctx_set_params_strict(ctx, params);
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}
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int EVP_PKEY_CTX_set_dh_paramgen_subprime_len(EVP_PKEY_CTX *ctx, int qbits)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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size_t bits2 = qbits;
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if ((ret = dh_paramgen_check(ctx)) <= 0)
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return ret;
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*p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_QBITS, &bits2);
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*p = OSSL_PARAM_construct_end();
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return evp_pkey_ctx_set_params_strict(ctx, params);
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}
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int EVP_PKEY_CTX_set_dh_paramgen_generator(EVP_PKEY_CTX *ctx, int gen)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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if ((ret = dh_paramgen_check(ctx)) <= 0)
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return ret;
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*p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_DH_GENERATOR, &gen);
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*p = OSSL_PARAM_construct_end();
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return evp_pkey_ctx_set_params_strict(ctx, params);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_dh_rfc5114(EVP_PKEY_CTX *ctx, int gen)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN,
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EVP_PKEY_CTRL_DH_RFC5114, gen, NULL);
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}
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int EVP_PKEY_CTX_set_dhx_rfc5114(EVP_PKEY_CTX *ctx, int gen)
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{
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return EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_dh_nid(EVP_PKEY_CTX *ctx, int nid)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH,
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EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN,
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EVP_PKEY_CTRL_DH_NID, nid, NULL);
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}
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int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad)
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{
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OSSL_PARAM dh_pad_params[2];
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unsigned int upad = pad;
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/* We use EVP_PKEY_CTX_ctrl return values */
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if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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return -2;
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}
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dh_pad_params[0] = OSSL_PARAM_construct_uint(OSSL_EXCHANGE_PARAM_PAD, &upad);
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dh_pad_params[1] = OSSL_PARAM_construct_end();
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return evp_pkey_ctx_set_params_strict(ctx, dh_pad_params);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_dh_kdf_type(EVP_PKEY_CTX *ctx, int kdf)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_DH_KDF_TYPE, kdf, NULL);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_get_dh_kdf_type(EVP_PKEY_CTX *ctx)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_DH_KDF_TYPE, -2, NULL);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set0_dh_kdf_oid(EVP_PKEY_CTX *ctx, ASN1_OBJECT *oid)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_DH_KDF_OID, 0, (void *)(oid));
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_get0_dh_kdf_oid(EVP_PKEY_CTX *ctx, ASN1_OBJECT **oid)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_GET_DH_KDF_OID, 0, (void *)(oid));
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_dh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_DH_KDF_MD, 0, (void *)(md));
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_get_dh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **pmd)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_GET_DH_KDF_MD, 0, (void *)(pmd));
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}
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int EVP_PKEY_CTX_set_dh_kdf_outlen(EVP_PKEY_CTX *ctx, int outlen)
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{
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int ret;
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size_t len = outlen;
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OSSL_PARAM params[2], *p = params;
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ret = dh_param_derive_check(ctx);
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if (ret != 1)
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return ret;
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if (outlen <= 0) {
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/*
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* This would ideally be -1 or 0, but we have to retain compatibility
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* with legacy behaviour of EVP_PKEY_CTX_ctrl() which returned -2 if
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* inlen <= 0
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*/
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return -2;
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}
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*p++ = OSSL_PARAM_construct_size_t(OSSL_EXCHANGE_PARAM_KDF_OUTLEN,
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&len);
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*p = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_set_params_strict(ctx, params);
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if (ret == -2)
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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return ret;
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}
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int EVP_PKEY_CTX_get_dh_kdf_outlen(EVP_PKEY_CTX *ctx, int *plen)
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{
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int ret;
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size_t len = UINT_MAX;
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OSSL_PARAM params[2], *p = params;
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ret = dh_param_derive_check(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_size_t(OSSL_EXCHANGE_PARAM_KDF_OUTLEN,
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&len);
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*p = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_get_params_strict(ctx, params);
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if (ret == -2)
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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if (ret != 1 || len > INT_MAX)
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return -1;
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*plen = (int)len;
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return 1;
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}
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int EVP_PKEY_CTX_set0_dh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm, int len)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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if (len < 0)
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return -1;
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ret = dh_param_derive_check(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_EXCHANGE_PARAM_KDF_UKM,
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/*
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* Cast away the const. This is read
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* only so should be safe
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*/
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(void *)ukm,
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(size_t)len);
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*p = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_set_params_strict(ctx, params);
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if (ret == -2)
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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if (ret == 1)
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OPENSSL_free(ukm);
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return ret;
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}
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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int EVP_PKEY_CTX_get0_dh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **pukm)
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{
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int ret;
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size_t ukmlen;
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OSSL_PARAM params[2], *p = params;
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ret = dh_param_derive_check(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_octet_ptr(OSSL_EXCHANGE_PARAM_KDF_UKM,
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(void **)pukm, 0);
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*p = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_get_params_strict(ctx, params);
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if (ret == -2)
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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if (ret != 1)
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return -1;
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ukmlen = params[0].return_size;
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if (ukmlen > INT_MAX)
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return -1;
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return (int)ukmlen;
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}
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#endif
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