Mercurial > dropbear

comparison libtomcrypt/src/modes/xts/xts_init.c @ 1435:f849a5ca2efc

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
update to libtomcrypt 1.17 (with Dropbear changes)
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Jun 2017 17:50:50 +0800
parents
children 6dba84798cd5
comparison
equal deleted inserted replaced
1434:27b9ddb06b09 1435:f849a5ca2efc
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, [email protected], http://libtom.org
10 */
11 #include "tomcrypt.h"
12
13 /**
14 Source donated by Elliptic Semiconductor Inc (www.ellipticsemi.com) to the LibTom Projects
15 */
16
17 #ifdef LTC_XTS_MODE
18
19
20 /** Start XTS mode
21 @param cipher The index of the cipher to use
22 @param key1 The encrypt key
23 @param key2 The tweak encrypt key
24 @param keylen The length of the keys (each) in octets
25 @param num_rounds The number of rounds for the cipher (0 == default)
26 @param xts [out] XTS structure
27 Returns CRYPT_OK upon success.
28 */
29 int xts_start( int cipher,
30 const unsigned char *key1,
31 const unsigned char *key2,
32 unsigned long keylen,
33 int num_rounds,
34 symmetric_xts *xts)
35 {
36 int err;
37
38 /* check inputs */
39 LTC_ARGCHK(key1 != NULL);
40 LTC_ARGCHK(key2 != NULL);
41 LTC_ARGCHK(xts != NULL);
42
43 /* check if valid */
44 if ((err = cipher_is_valid(cipher)) != CRYPT_OK) {
45 return err;
46 }
47
48 if (cipher_descriptor[cipher].block_length != 16) {
49 return CRYPT_INVALID_ARG;
50 }
51
52 /* schedule the two ciphers */
53 if ((err = cipher_descriptor[cipher].setup(key1, keylen, num_rounds, &xts->key1)) != CRYPT_OK) {
54 return err;
55 }
56 if ((err = cipher_descriptor[cipher].setup(key2, keylen, num_rounds, &xts->key2)) != CRYPT_OK) {
57 return err;
58 }
59 xts->cipher = cipher;
60
61 return err;
62 }
63
64 #endif
65
66 /* $Source$ */
67 /* $Revision$ */
68 /* $Date$ */
69