utils/tomcrypt/src/misc/crypt/crypt_cipher_is_valid.c at master · tsiry-sandratraina.com/rockbox-zig

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rockbox-zig / utils / tomcrypt / src / misc / crypt / crypt_cipher_is_valid.c

at master 34 lines 950 B view raw

 1/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 2 *
 3 * LibTomCrypt is a library that provides various cryptographic
 4 * algorithms in a highly modular and flexible manner.
 5 *
 6 * The library is free for all purposes without any express
 7 * guarantee it works.
 8 */
 9#include "tomcrypt.h"
10
11/**
12  @file crypt_cipher_is_valid.c
13  Determine if cipher is valid, Tom St Denis
14*/
15
16/*
17   Test if a cipher index is valid
18   @param idx   The index of the cipher to search for
19   @return CRYPT_OK if valid
20*/
21int cipher_is_valid(int idx)
22{
23   LTC_MUTEX_LOCK(&ltc_cipher_mutex);
24   if (idx < 0 || idx >= TAB_SIZE || cipher_descriptor[idx].name == NULL) {
25      LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
26      return CRYPT_INVALID_CIPHER;
27   }
28   LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
29   return CRYPT_OK;
30}
31
32/* ref:         HEAD -> master, tag: v1.18.2 */
33/* git commit:  7e7eb695d581782f04b24dc444cbfde86af59853 */
34/* commit time: 2018-07-01 22:49:01 +0200 */