// SPDX-License-Identifier: BSD-2-Clause
/* 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.
 */
#include "tomcrypt_private.h"

/**
  @file crypt_unregister_cipher.c
  Unregister a cipher, Tom St Denis
*/

/**
  Unregister a cipher from the descriptor table
  @param cipher   The cipher descriptor to remove
  @return CRYPT_OK on success
*/
int unregister_cipher(const struct ltc_cipher_descriptor *cipher)
{
   int x;

   LTC_ARGCHK(cipher != NULL);

   /* is it already registered? */
   LTC_MUTEX_LOCK(&ltc_cipher_mutex);
   for (x = 0; x < TAB_SIZE; x++) {
       if (cipher_descriptor[x] == cipher) {
          cipher_descriptor[x] = NULL;
          LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
          return CRYPT_OK;
       }
   }
   LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
   return CRYPT_ERROR;
}

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