ref: 4010db3078491baf3cb0d3d4e3a60c0cea114471
dir: /third_party/boringssl/src/crypto/evp/sign.c/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/evp.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include "internal.h"
int EVP_SignInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) {
return EVP_DigestInit_ex(ctx, type, impl);
}
int EVP_SignInit(EVP_MD_CTX *ctx, const EVP_MD *type) {
return EVP_DigestInit(ctx, type);
}
int EVP_SignUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
return EVP_DigestUpdate(ctx, data, len);
}
int EVP_SignFinal(const EVP_MD_CTX *ctx, uint8_t *sig,
unsigned int *out_sig_len, EVP_PKEY *pkey) {
uint8_t m[EVP_MAX_MD_SIZE];
unsigned int m_len;
int ret = 0;
EVP_MD_CTX tmp_ctx;
EVP_PKEY_CTX *pkctx = NULL;
size_t sig_len = EVP_PKEY_size(pkey);
*out_sig_len = 0;
EVP_MD_CTX_init(&tmp_ctx);
if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) ||
!EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) {
goto out;
}
EVP_MD_CTX_cleanup(&tmp_ctx);
pkctx = EVP_PKEY_CTX_new(pkey, NULL);
if (!pkctx || !EVP_PKEY_sign_init(pkctx) ||
!EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) ||
!EVP_PKEY_sign(pkctx, sig, &sig_len, m, m_len)) {
goto out;
}
*out_sig_len = sig_len;
ret = 1;
out:
if (pkctx) {
EVP_PKEY_CTX_free(pkctx);
}
return ret;
}
int EVP_VerifyInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl) {
return EVP_DigestInit_ex(ctx, type, impl);
}
int EVP_VerifyInit(EVP_MD_CTX *ctx, const EVP_MD *type) {
return EVP_DigestInit(ctx, type);
}
int EVP_VerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t len) {
return EVP_DigestUpdate(ctx, data, len);
}
int EVP_VerifyFinal(EVP_MD_CTX *ctx, const uint8_t *sig, size_t sig_len,
EVP_PKEY *pkey) {
uint8_t m[EVP_MAX_MD_SIZE];
unsigned int m_len;
int ret = 0;
EVP_MD_CTX tmp_ctx;
EVP_PKEY_CTX *pkctx = NULL;
EVP_MD_CTX_init(&tmp_ctx);
if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx) ||
!EVP_DigestFinal_ex(&tmp_ctx, m, &m_len)) {
EVP_MD_CTX_cleanup(&tmp_ctx);
goto out;
}
EVP_MD_CTX_cleanup(&tmp_ctx);
pkctx = EVP_PKEY_CTX_new(pkey, NULL);
if (!pkctx ||
!EVP_PKEY_verify_init(pkctx) ||
!EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest)) {
goto out;
}
ret = EVP_PKEY_verify(pkctx, sig, sig_len, m, m_len);
out:
EVP_PKEY_CTX_free(pkctx);
return ret;
}