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 <openssl/pem.h>
16
17int PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)
18{
19 return EVP_DigestInit_ex(ctx, type, NULL);
20}
21
22int PEM_SignUpdate(EVP_MD_CTX *ctx,
23 const unsigned char *data, unsigned int count)
24{
25 return EVP_DigestUpdate(ctx, data, count);
26}
27
28int 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_size(pkey));
36 if (m == NULL) {
37 PEMerr(PEM_F_PEM_SIGNFINAL, ERR_R_MALLOC_FAILURE);
38 goto err;
39 }
40
41 if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0)
42 goto err;
43
44 i = EVP_EncodeBlock(sigret, m, m_len);
45 *siglen = i;
46 ret = 1;
47 err:
48 /* ctx has been zeroed by EVP_SignFinal() */
49 OPENSSL_free(m);
50 return ret;
51}
52