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 <openssl/pem.h>
16
PEM_SignInit(EVP_MD_CTX * ctx,EVP_MD * type)17 int PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)
18 {
19 return EVP_DigestInit_ex(ctx, type, NULL);
20 }
21
PEM_SignUpdate(EVP_MD_CTX * ctx,const unsigned char * data,unsigned int count)22 int PEM_SignUpdate(EVP_MD_CTX *ctx,
23 const unsigned char *data, unsigned int count)
24 {
25 return EVP_DigestUpdate(ctx, data, count);
26 }
27
PEM_SignFinal(EVP_MD_CTX * ctx,unsigned char * sigret,unsigned int * siglen,EVP_PKEY * pkey)28 int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
29 unsigned int *siglen, EVP_PKEY *pkey)
30 {
31 unsigned char *m;
32 int i, ret = 0;
33 unsigned int m_len;
34
35 m = OPENSSL_malloc(EVP_PKEY_get_size(pkey));
36 if (m == NULL)
37 goto err;
38
39 if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0)
40 goto err;
41
42 i = EVP_EncodeBlock(sigret, m, m_len);
43 *siglen = i;
44 ret = 1;
45 err:
46 /* ctx has been zeroed by EVP_SignFinal() */
47 OPENSSL_free(m);
48 return ret;
49 }
50
