diff options
Diffstat (limited to 'core/lib/libtomcrypt/src/modes/xts/xts_init.c')
-rw-r--r-- | core/lib/libtomcrypt/src/modes/xts/xts_init.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/core/lib/libtomcrypt/src/modes/xts/xts_init.c b/core/lib/libtomcrypt/src/modes/xts/xts_init.c new file mode 100644 index 0000000..318d381 --- /dev/null +++ b/core/lib/libtomcrypt/src/modes/xts/xts_init.c @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2001-2007, Tom St Denis + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* 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" + +/** + Source donated by Elliptic Semiconductor Inc (www.ellipticsemi.com) to the LibTom Projects +*/ + +#ifdef LTC_XTS_MODE + + +/** Start XTS mode + @param cipher The index of the cipher to use + @param key1 The encrypt key + @param key2 The tweak encrypt key + @param keylen The length of the keys (each) in octets + @param num_rounds The number of rounds for the cipher (0 == default) + @param xts [out] XTS structure + Returns CRYPT_OK upon success. +*/ +int xts_start( int cipher, + const unsigned char *key1, + const unsigned char *key2, + unsigned long keylen, + int num_rounds, + symmetric_xts *xts) +{ + int err; + + /* check inputs */ + LTC_ARGCHK(key1 != NULL); + LTC_ARGCHK(key2 != NULL); + LTC_ARGCHK(xts != NULL); + + /* check if valid */ + if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { + return err; + } + + if (cipher_descriptor[cipher]->block_length != 16) { + return CRYPT_INVALID_ARG; + } + + /* schedule the two ciphers */ + if ((err = cipher_descriptor[cipher]->setup(key1, keylen, num_rounds, &xts->key1)) != CRYPT_OK) { + return err; + } + if ((err = cipher_descriptor[cipher]->setup(key2, keylen, num_rounds, &xts->key2)) != CRYPT_OK) { + return err; + } + xts->cipher = cipher; + + return err; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/modes/xts/xts_init.c,v $ */ +/* $Revision: 1.4 $ */ +/* $Date: 2007/03/10 23:59:09 $ */ |