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      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  * Tom St Denis, tomstdenis (at) gmail.com, http://libtomcrypt.com
     10  */
     11 #include "tomcrypt.h"
     12 
     13 /**
     14   @file crypt_find_cipher_id.c
     15   Find cipher by ID, Tom St Denis
     16 */
     17 
     18 /**
     19    Find a cipher by ID number
     20    @param ID    The ID (not same as index) of the cipher to find
     21    @return >= 0 if found, -1 if not present
     22 */
     23 int find_cipher_id(unsigned char ID)
     24 {
     25    int x;
     26    LTC_MUTEX_LOCK(&ltc_cipher_mutex);
     27    for (x = 0; x < TAB_SIZE; x++) {
     28        if (cipher_descriptor[x].ID == ID) {
     29           x = (cipher_descriptor[x].name == NULL) ? -1 : x;
     30           LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
     31           return x;
     32        }
     33    }
     34    LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
     35    return -1;
     36 }
     37 
     38 /* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_find_cipher_id.c,v $ */
     39 /* $Revision: 1.5 $ */
     40 /* $Date: 2006/03/31 14:15:35 $ */
     41