crypto/asn1/a_digest.c

   1 /*
   2  * Copyright 1995-2016 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 <time.h>
  12 #include <sys/types.h>
  13
  14 #include "internal/cryptlib.h"
  15
  16 #include <openssl/err.h>
  17 #include <openssl/evp.h>
  18 #include <openssl/buffer.h>
  19 #include <openssl/x509.h>
  20
  21 #ifndef NO_ASN1_OLD
  22
  23 int ASN1_digest(i2d_of_void *i2d, const EVP_MD *type, char *data,
  24                 unsigned char *md, unsigned int *len)
  25 {
  26     int i;
  27     unsigned char *str, *p;
  28
  29     i = i2d(data, NULL);
  30     if ((str = OPENSSL_malloc(i)) == NULL) {
  31         ASN1err(ASN1_F_ASN1_DIGEST, ERR_R_MALLOC_FAILURE);
  32         return 0;
  33     }
  34     p = str;
  35     i2d(data, &p);
  36
  37     if (!EVP_Digest(str, i, md, len, type, NULL)) {
  38         OPENSSL_free(str);
  39         return 0;
  40     }
  41     OPENSSL_free(str);
  42     return 1;
  43 }
  44
  45 #endif
  46
  47 int ASN1_item_digest(const ASN1_ITEM *it, const EVP_MD *type, void *asn,
  48                      unsigned char *md, unsigned int *len)
  49 {
  50     int i;
  51     unsigned char *str = NULL;
  52
  53     i = ASN1_item_i2d(asn, &str, it);
  54     if (!str)
  55         return 0;
  56
  57     if (!EVP_Digest(str, i, md, len, type, NULL)) {
  58         OPENSSL_free(str);
  59         return 0;
  60     }
  61     OPENSSL_free(str);
  62     return 1;
  63 }