crypto/external/bsd/openssl/lib/libcrypto/libc-sha256.c

   1 /*
   2  * Special version of sha256.c that uses the libc SHA256 implementation
   3  * of libc.
   4  */
   5
   6 /* crypto/sha/sha256.c */
   7 /* ====================================================================
   8  * Copyright (c) 2004 The OpenSSL Project.  All rights reserved
   9  * according to the OpenSSL license [found in ../../LICENSE].
  10  * ====================================================================
  11  */
  12 #include <openssl/opensslconf.h>
  13
  14 #include <stdlib.h>
  15 #include <string.h>
  16
  17 #include <openssl/crypto.h>
  18 #include <openssl/sha.h>
  19 #include <openssl/opensslv.h>
  20
  21 #include "cryptlib.h"
  22
  23 const char SHA256_version[]="SHA-256" OPENSSL_VERSION_PTEXT;
  24
  25 unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md)
  26         {
  27         SHA256_CTX c;
  28         static unsigned char m[SHA224_DIGEST_LENGTH];
  29
  30         if (md == NULL) md=m;
  31         SHA224_Init(&c);
  32         SHA224_Update(&c,d,n);
  33         SHA224_Final(md,&c);
  34         OPENSSL_cleanse(&c,sizeof(c));
  35         return(md);
  36         }
  37
  38 unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md)
  39         {
  40         SHA256_CTX c;
  41         static unsigned char m[SHA256_DIGEST_LENGTH];
  42
  43         if (md == NULL) md=m;
  44         SHA256_Init(&c);
  45         SHA256_Update(&c,d,n);
  46         SHA256_Final(md,&c);
  47         OPENSSL_cleanse(&c,sizeof(c));
  48         return(md);
  49         }