1 /*
2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/evp.h>
13 #include <openssl/objects.h>
14 #include <openssl/x509.h>
15 #include "crypto/evp.h"
16
EVP_VerifyFinal_ex(EVP_MD_CTX * ctx,const unsigned char * sigbuf,unsigned int siglen,EVP_PKEY * pkey,OSSL_LIB_CTX * libctx,const char * propq)17 int EVP_VerifyFinal_ex(EVP_MD_CTX *ctx, const unsigned char *sigbuf,
18 unsigned int siglen, EVP_PKEY *pkey, OSSL_LIB_CTX *libctx,
19 const char *propq)
20 {
21 unsigned char m[EVP_MAX_MD_SIZE];
22 unsigned int m_len = 0;
23 int i = 0;
24 EVP_PKEY_CTX *pkctx = NULL;
25
26 if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_FINALISE)) {
27 if (!EVP_DigestFinal_ex(ctx, m, &m_len))
28 goto err;
29 } else {
30 int rv = 0;
31 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
32
33 if (tmp_ctx == NULL) {
34 ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
35 return 0;
36 }
37 rv = EVP_MD_CTX_copy_ex(tmp_ctx, ctx);
38 if (rv)
39 rv = EVP_DigestFinal_ex(tmp_ctx, m, &m_len);
40 else
41 rv = EVP_DigestFinal_ex(ctx, m, &m_len);
42 EVP_MD_CTX_free(tmp_ctx);
43 if (!rv)
44 return 0;
45 }
46
47 i = -1;
48 pkctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
49 if (pkctx == NULL)
50 goto err;
51 if (EVP_PKEY_verify_init(pkctx) <= 0)
52 goto err;
53 if (EVP_PKEY_CTX_set_signature_md(pkctx, EVP_MD_CTX_get0_md(ctx)) <= 0)
54 goto err;
55 i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len);
56 err:
57 EVP_PKEY_CTX_free(pkctx);
58 return i;
59 }
60
EVP_VerifyFinal(EVP_MD_CTX * ctx,const unsigned char * sigbuf,unsigned int siglen,EVP_PKEY * pkey)61 int EVP_VerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sigbuf,
62 unsigned int siglen, EVP_PKEY *pkey)
63 {
64 return EVP_VerifyFinal_ex(ctx, sigbuf, siglen, pkey, NULL, NULL);
65 }
66
