/* 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, tomstdenis@iahu.ca, http://libtomcrypt.org */#include "mycrypt.h"int unregister_cipher(const struct _cipher_descriptor *cipher){   int x;   _ARGCHK(cipher != NULL);   /* is it already registered? */   for (x = 0; x < TAB_SIZE; x++) {       if (memcmp(&cipher_descriptor[x], cipher, sizeof(struct _cipher_descriptor)) == 0) {          cipher_descriptor[x].name = NULL;          cipher_descriptor[x].ID   = 255;          return CRYPT_OK;       }   }   return CRYPT_ERROR;}