Mercurial > dropbear
diff libtomcrypt/src/modes/lrw/lrw_decrypt.c @ 391:00fcf5045160
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head c1db4398d56c56c6d06ae1e20c1e0d04dbb598ed)
to branch 'au.asn.ucc.matt.dropbear' (head d26d5eb2837f46b56a33fb0e7573aa0201abd4d5)
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Thu, 11 Jan 2007 04:29:08 +0000 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtomcrypt/src/modes/lrw/lrw_decrypt.c Thu Jan 11 04:29:08 2007 +0000 @@ -0,0 +1,51 @@ +/* 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, [email protected], http://libtomcrypt.com + */ +#include "tomcrypt.h" + +/** + @file lrw_decrypt.c + LRW_MODE implementation, Decrypt blocks, Tom St Denis +*/ + +#ifdef LTC_LRW_MODE + +/** + LRW decrypt blocks + @param ct The ciphertext + @param pt [out] The plaintext + @param len The length in octets, must be a multiple of 16 + @param lrw The LRW state +*/ +int lrw_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_LRW *lrw) +{ + int err; + + LTC_ARGCHK(pt != NULL); + LTC_ARGCHK(ct != NULL); + LTC_ARGCHK(lrw != NULL); + + if ((err = cipher_is_valid(lrw->cipher)) != CRYPT_OK) { + return err; + } + + if (cipher_descriptor[lrw->cipher].accel_lrw_decrypt != NULL) { + return cipher_descriptor[lrw->cipher].accel_lrw_decrypt(ct, pt, len, lrw->IV, lrw->tweak, &lrw->key); + } + + return lrw_process(ct, pt, len, LRW_DECRYPT, lrw); +} + + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/modes/lrw/lrw_decrypt.c,v $ */ +/* $Revision: 1.8 $ */ +/* $Date: 2006/06/29 01:53:13 $ */