C++ (Cpp) chacha_done示例

示例#1

文件： chacha20.c 项目： FirebirdSQL/firebird

/**
  Terminate the PRNG
  @param prng   The PRNG to terminate
  @return CRYPT_OK if successful
*/
int chacha20_prng_done(prng_state *prng)
{
   int err;
   LTC_ARGCHK(prng != NULL);
   LTC_MUTEX_LOCK(&prng->lock);
   prng->ready = 0;
   err = chacha_done(&prng->chacha.s);
   LTC_MUTEX_UNLOCK(&prng->lock);
   LTC_MUTEX_DESTROY(&prng->lock);
   return err;
}

示例#2

文件： chacha20poly1305_done.c 项目： DCIT/perl-CryptX

/**
  Terminate a ChaCha20Poly1305 stream
  @param st      The ChaCha20Poly1305 state
  @param tag     [out] The destination for the MAC tag
  @param taglen  [in/out]  The length of the MAC tag
  @return CRYPT_OK on success
 */
int chacha20poly1305_done(chacha20poly1305_state *st, unsigned char *tag, unsigned long *taglen)
{
   unsigned char padzero[16] = { 0 };
   unsigned long padlen;
   unsigned char buf[16];
   int err;

   LTC_ARGCHK(st != NULL);

   padlen = 16 - (unsigned long)(st->ctlen % 16);
   if (padlen < 16) {
     if ((err = poly1305_process(&st->poly, padzero, padlen)) != CRYPT_OK) return err;
   }
   STORE64L(st->aadlen, buf);
   STORE64L(st->ctlen, buf + 8);
   if ((err = poly1305_process(&st->poly, buf, 16)) != CRYPT_OK)           return err;
   if ((err = poly1305_done(&st->poly, tag, taglen)) != CRYPT_OK)          return err;
   if ((err = chacha_done(&st->chacha)) != CRYPT_OK)                       return err;
   return CRYPT_OK;
}