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 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_get_size(pkey)); 36 if (m == NULL) { 37 ERR_raise(ERR_LIB_PEM, 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