sha1.c

   1 /*
   2  * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file sha1.c Secure Hash Algorithm, provided by openssl. */
   8
   9 #include "para.h"
  10 #include <openssl/sha.h>
  11
  12 /**
  13  * Compute the sha1 hash.
  14  *
  15  * \param data Pointer to the data to compute the hash value from.
  16  * \param len The length of \a data in bytes.
  17  * \param sha1 Result pointer.
  18  *
  19  * \a sha1 must point to an area at least 20 bytes large.
  20  *
  21  * \sa sha(3), openssl(1).
  22  * */
  23 void sha1_hash(const char *data, unsigned long len, unsigned char *sha1)
  24 {
  25         SHA_CTX c;
  26         SHA1_Init(&c);
  27         SHA1_Update(&c, data, len);
  28         SHA1_Final(sha1, &c);
  29 }