1 /* 2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 17 int PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type) 18 { 19 return EVP_DigestInit_ex(ctx, type, NULL); 20 } 21 22 int PEM_SignUpdate(EVP_MD_CTX *ctx, unsigned char *data, unsigned int count) 23 { 24 return EVP_DigestUpdate(ctx, data, count); 25 } 26 27 int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, 28 unsigned int *siglen, EVP_PKEY *pkey) 29 { 30 unsigned char *m; 31 int i, ret = 0; 32 unsigned int m_len; 33 34 m = OPENSSL_malloc(EVP_PKEY_size(pkey)); 35 if (m == NULL) { 36 PEMerr(PEM_F_PEM_SIGNFINAL, ERR_R_MALLOC_FAILURE); 37 goto err; 38 } 39 40 if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0) 41 goto err; 42 43 i = EVP_EncodeBlock(sigret, m, m_len); 44 *siglen = i; 45 ret = 1; 46 err: 47 /* ctx has been zeroed by EVP_SignFinal() */ 48 OPENSSL_free(m); 49 return ret; 50 } 51