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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 ctr_done.c
     15    CTR implementation, finish chain, Tom St Denis
     16 */
     17 
     18 #ifdef LTC_CTR_MODE
     19 
     20 /** Terminate the chain
     21   @param ctr    The CTR chain to terminate
     22   @return CRYPT_OK on success
     23 */
     24 int ctr_done(symmetric_CTR *ctr)
     25 {
     26    int err;
     27    LTC_ARGCHK(ctr != NULL);
     28 
     29    if ((err = cipher_is_valid(ctr->cipher)) != CRYPT_OK) {
     30       return err;
     31    }
     32    cipher_descriptor[ctr->cipher].done(&ctr->key);
     33    return CRYPT_OK;
     34 }
     35 
     36 
     37 
     38 #endif
     39 
     40 /* $Source: /cvs/libtom/libtomcrypt/src/modes/ctr/ctr_done.c,v $ */
     41 /* $Revision: 1.6 $ */
     42 /* $Date: 2006/06/29 01:46:46 $ */
     43