status-go/vendor/github.com/mutecomm/go-sqlcipher/crypt_cipher_is_valid.c

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/* 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@gmail.com, http://libtom.org
*/
#include "tomcrypt.h"
/**
@file crypt_cipher_is_valid.c
Determine if cipher is valid, Tom St Denis
*/
/*
Test if a cipher index is valid
@param idx The index of the cipher to search for
@return CRYPT_OK if valid
*/
int cipher_is_valid(int idx)
{
LTC_MUTEX_LOCK(&ltc_cipher_mutex);
if (idx < 0 || idx >= TAB_SIZE || cipher_descriptor[idx].name == NULL) {
LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
return CRYPT_INVALID_CIPHER;
}
LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
return CRYPT_OK;
}
/* $Source$ */
/* $Revision$ */
/* $Date$ */