1 /*
2 * Copyright 1995-2021 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_SignFinal_ex(EVP_MD_CTX * ctx,unsigned char * sigret,unsigned int * siglen,EVP_PKEY * pkey,OSSL_LIB_CTX * libctx,const char * propq)17 int EVP_SignFinal_ex(EVP_MD_CTX *ctx, unsigned char *sigret,
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 size_t sltmp;
25 EVP_PKEY_CTX *pkctx = NULL;
26
27 *siglen = 0;
28 if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_FINALISE)) {
29 if (!EVP_DigestFinal_ex(ctx, m, &m_len))
30 goto err;
31 } else {
32 int rv = 0;
33 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
34
35 if (tmp_ctx == NULL) {
36 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
37 return 0;
38 }
39 rv = EVP_MD_CTX_copy_ex(tmp_ctx, ctx);
40 if (rv)
41 rv = EVP_DigestFinal_ex(tmp_ctx, m, &m_len);
42 EVP_MD_CTX_free(tmp_ctx);
43 if (!rv)
44 return 0;
45 }
46
47 sltmp = (size_t)EVP_PKEY_get_size(pkey);
48 i = 0;
49 pkctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
50 if (pkctx == NULL)
51 goto err;
52 if (EVP_PKEY_sign_init(pkctx) <= 0)
53 goto err;
54 if (EVP_PKEY_CTX_set_signature_md(pkctx, EVP_MD_CTX_get0_md(ctx)) <= 0)
55 goto err;
56 if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
57 goto err;
58 *siglen = sltmp;
59 i = 1;
60 err:
61 EVP_PKEY_CTX_free(pkctx);
62 return i;
63 }
64
EVP_SignFinal(EVP_MD_CTX * ctx,unsigned char * sigret,unsigned int * siglen,EVP_PKEY * pkey)65 int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
66 unsigned int *siglen, EVP_PKEY *pkey)
67 {
68 return EVP_SignFinal_ex(ctx, sigret, siglen, pkey, NULL, NULL);
69 }
70
