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61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include "crypto/evp.h"
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int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
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unsigned int *siglen, EVP_PKEY *pkey)
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{
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unsigned char m[EVP_MAX_MD_SIZE];
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unsigned int m_len = 0;
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int i = 0;
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size_t sltmp;
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EVP_PKEY_CTX *pkctx = NULL;
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*siglen = 0;
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if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_FINALISE)) {
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if (!EVP_DigestFinal_ex(ctx, m, &m_len))
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goto err;
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} else {
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int rv = 0;
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EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
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if (tmp_ctx == NULL) {
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EVPerr(EVP_F_EVP_SIGNFINAL, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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rv = EVP_MD_CTX_copy_ex(tmp_ctx, ctx);
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if (rv)
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rv = EVP_DigestFinal_ex(tmp_ctx, m, &m_len);
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EVP_MD_CTX_free(tmp_ctx);
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if (!rv)
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return 0;
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}
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sltmp = (size_t)EVP_PKEY_size(pkey);
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i = 0;
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pkctx = EVP_PKEY_CTX_new(pkey, NULL);
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if (pkctx == NULL)
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goto err;
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if (EVP_PKEY_sign_init(pkctx) <= 0)
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goto err;
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if (EVP_PKEY_CTX_set_signature_md(pkctx, EVP_MD_CTX_md(ctx)) <= 0)
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goto err;
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if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
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goto err;
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*siglen = sltmp;
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i = 1;
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err:
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EVP_PKEY_CTX_free(pkctx);
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return i;
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}
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