libtom.libtomcrypt/pmac_memory.c

/* 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.org
 */

/* PMAC implementation by Tom St Denis */
#include "mycrypt.h"

#ifdef PMAC

int pmac_memory(int cipher, 
                const unsigned char *key, unsigned long keylen,
                const unsigned char *msg, unsigned long msglen,
                      unsigned char *out, unsigned long *outlen)
{
   int err;
   pmac_state *pmac;

   _ARGCHK(key    != NULL);
   _ARGCHK(msg    != NULL);
   _ARGCHK(out    != NULL);
   _ARGCHK(outlen != NULL);

   /* allocate ram for pmac state */
   pmac = XMALLOC(sizeof(pmac_state));
   if (pmac == NULL) {
      return CRYPT_MEM;
   }
   
   if ((err = pmac_init(pmac, cipher, key, keylen)) != CRYPT_OK) {
      goto __ERR;
   }
   if ((err = pmac_process(pmac, msg, msglen)) != CRYPT_OK) {
      goto __ERR;
   }
   if ((err = pmac_done(pmac, out, outlen)) != CRYPT_OK) {
      goto __ERR;
   }

   err = CRYPT_OK;
__ERR:
#ifdef CLEAN_STACK
   zeromem(pmac, sizeof(pmac_state));
#endif

   XFREE(pmac);
   return err;   
}

#endif