crypto/sha/sha1_one.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 <string.h>
  12 #include <openssl/crypto.h>
  13 #include <openssl/sha.h>
  14
  15 unsigned char *SHA1(const unsigned char *d, size_t n, unsigned char *md)
  16 {
  17     SHA_CTX c;
  18     static unsigned char m[SHA_DIGEST_LENGTH];
  19
  20     if (md == NULL)
  21         md = m;
  22     if (!SHA1_Init(&c))
  23         return NULL;
  24     SHA1_Update(&c, d, n);
  25     SHA1_Final(md, &c);
  26     OPENSSL_cleanse(&c, sizeof(c));
  27     return md;
  28 }