1 | /* |
2 | * Copyright 1995-2016 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 | |
17 | int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, |
18 | unsigned int *siglen, EVP_PKEY *pkey) |
19 | { |
20 | unsigned char m[EVP_MAX_MD_SIZE]; |
21 | unsigned int m_len = 0; |
22 | int i = 0; |
23 | size_t sltmp; |
24 | EVP_PKEY_CTX *pkctx = NULL; |
25 | |
26 | *siglen = 0; |
27 | if (EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_FINALISE)) { |
28 | if (!EVP_DigestFinal_ex(ctx, m, &m_len)) |
29 | goto err; |
30 | } else { |
31 | int rv = 0; |
32 | EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new(); |
33 | if (tmp_ctx == NULL) { |
34 | EVPerr(EVP_F_EVP_SIGNFINAL, ERR_R_MALLOC_FAILURE); |
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 | EVP_MD_CTX_free(tmp_ctx); |
41 | if (!rv) |
42 | return 0; |
43 | } |
44 | |
45 | sltmp = (size_t)EVP_PKEY_size(pkey); |
46 | i = 0; |
47 | pkctx = EVP_PKEY_CTX_new(pkey, NULL); |
48 | if (pkctx == NULL) |
49 | goto err; |
50 | if (EVP_PKEY_sign_init(pkctx) <= 0) |
51 | goto err; |
52 | if (EVP_PKEY_CTX_set_signature_md(pkctx, EVP_MD_CTX_md(ctx)) <= 0) |
53 | goto err; |
54 | if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0) |
55 | goto err; |
56 | *siglen = sltmp; |
57 | i = 1; |
58 | err: |
59 | EVP_PKEY_CTX_free(pkctx); |
60 | return i; |
61 | } |
62 | |