text: /* 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 (XMEMCMP(&cipher_descriptor[x], cipher, sizeof(struct ltc_cipher_descriptor)) == 0) {
            cipher_descriptor[x].name = NULL;
            cipher_descriptor[x].ID   = 255;
            LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
            return CRYPT_OK;
         }
     }
     LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
     return CRYPT_ERROR;
  }
  
  /* ref:         $Format:%D$ */
  /* git commit:  $Format:%H$ */
  /* commit time: $Format:%ai$ */
  