view libtomcrypt/src/mac/xcbc/xcbc_memory.c @ 384:a05fb340a95d

propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head ffd1015238ffcc959f6cd95176d96fcd0945a397) to branch 'au.asn.ucc.matt.dropbear' (head 52ccb0ad0587a62bc64aecb939adbb76546aac16)
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 03:05:30 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, [email protected], http://libtomcrypt.com
 */
#include "tomcrypt.h"

/**
  @file xcbc_process.c
  XCBC Support, XCBC-MAC a block of memory
*/

#ifdef LTC_XCBC

/** XCBC-MAC a block of memory 
  @param cipher     Index of cipher to use
  @param key        [in]  Secret key
  @param keylen     Length of key in octets
  @param in         [in]  Message to MAC
  @param inlen      Length of input in octets
  @param out        [out] Destination for the MAC tag
  @param outlen     [in/out] Output size and final tag size
  Return CRYPT_OK on success.
*/
int xcbc_memory(int cipher, 
               const unsigned char *key, unsigned long keylen,
               const unsigned char *in,  unsigned long inlen,
                     unsigned char *out, unsigned long *outlen)
{
   xcbc_state *xcbc;
   int         err;

   /* is the cipher valid? */
   if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
      return err;
   }

   /* Use accelerator if found */
   if (cipher_descriptor[cipher].xcbc_memory != NULL) {
      return cipher_descriptor[cipher].xcbc_memory(key, keylen, in, inlen, out, outlen);
   }

   xcbc = XCALLOC(1, sizeof(*xcbc));
   if (xcbc == NULL) {
      return CRYPT_MEM;
   }

   if ((err = xcbc_init(xcbc, cipher, key, keylen)) != CRYPT_OK) {
     goto done;
   }

   if ((err = xcbc_process(xcbc, in, inlen)) != CRYPT_OK) {
     goto done;
   }

   err = xcbc_done(xcbc, out, outlen);
done:
   XFREE(xcbc);
   return err;
}

#endif

/* $Source: /cvs/libtom/libtomcrypt/src/mac/xcbc/xcbc_memory.c,v $ */
/* $Revision: 1.4 $ */
/* $Date: 2006/11/21 23:02:42 $ */