Mercurial > dropbear

annotate libtomcrypt/src/modes/xts/xts_encrypt.c @ 1470:8bba51a55704

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update to libtommath v1.0.1
author Matt Johnston <matt@ucc.asn.au>
date Thu, 08 Feb 2018 23:11:40 +0800
parents f849a5ca2efc
children 6dba84798cd5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 *
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 * LibTomCrypt is a library that provides various cryptographic
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 * algorithms in a highly modular and flexible manner.
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 *
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 * The library is free for all purposes without any express
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 * guarantee it works.
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
8 *
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9 * Tom St Denis, [email protected], http://libtom.org
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 #include "tomcrypt.h"
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
13 /**
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 Source donated by Elliptic Semiconductor Inc (www.ellipticsemi.com) to the LibTom Projects
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17 #ifdef LTC_XTS_MODE
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 static int tweak_crypt(const unsigned char *P, unsigned char *C, unsigned char *T, symmetric_xts *xts)
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20 {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 unsigned long x;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 int err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24 /* tweak encrypt block i */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25 #ifdef LTC_FAST
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 for (x = 0; x < 16; x += sizeof(LTC_FAST_TYPE)) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 *((LTC_FAST_TYPE*)&C[x]) = *((LTC_FAST_TYPE*)&P[x]) ^ *((LTC_FAST_TYPE*)&T[x]);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
29 #else
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 for (x = 0; x < 16; x++) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 C[x] = P[x] ^ T[x];
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33 #endif
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
35 if ((err = cipher_descriptor[xts->cipher].ecb_encrypt(C, C, &xts->key1)) != CRYPT_OK) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
36 return err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
37 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
38
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
39 #ifdef LTC_FAST
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
40 for (x = 0; x < 16; x += sizeof(LTC_FAST_TYPE)) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
41 *((LTC_FAST_TYPE*)&C[x]) ^= *((LTC_FAST_TYPE*)&T[x]);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
42 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43 #else
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44 for (x = 0; x < 16; x++) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45 C[x] = C[x] ^ T[x];
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 #endif
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49 /* LFSR the tweak */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 xts_mult_x(T);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 return CRYPT_OK;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
54
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55 /** XTS Encryption
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 @param pt [in] Plaintext
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 @param ptlen Length of plaintext (and ciphertext)
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58 @param ct [out] Ciphertext
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 @param tweak [in] The 128--bit encryption tweak (e.g. sector number)
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60 @param xts The XTS structure
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61 Returns CRYPT_OK upon success
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
62 */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63 int xts_encrypt(
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64 const unsigned char *pt, unsigned long ptlen,
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 unsigned char *ct,
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 const unsigned char *tweak,
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67 symmetric_xts *xts)
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 unsigned char PP[16], CC[16], T[16];
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70 unsigned long i, m, mo, lim;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
71 int err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73 /* check inputs */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 LTC_ARGCHK(pt != NULL);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75 LTC_ARGCHK(ct != NULL);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76 LTC_ARGCHK(tweak != NULL);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77 LTC_ARGCHK(xts != NULL);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 /* check if valid */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
80 if ((err = cipher_is_valid(xts->cipher)) != CRYPT_OK) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81 return err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 /* get number of blocks */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85 m = ptlen >> 4;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 mo = ptlen & 15;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88 /* must have at least one full block */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 if (m == 0) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
90 return CRYPT_INVALID_ARG;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 /* encrypt the tweak */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 if ((err = cipher_descriptor[xts->cipher].ecb_encrypt(tweak, T, &xts->key2)) != CRYPT_OK) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 return err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
98 /* for i = 0 to m-2 do */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99 if (mo == 0) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 lim = m;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 } else {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102 lim = m - 1;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 for (i = 0; i < lim; i++) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106 err = tweak_crypt(pt, ct, T, xts);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107 ct += 16;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 pt += 16;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 /* if ptlen not divide 16 then */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
112 if (mo > 0) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113 /* CC = tweak encrypt block m-1 */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
114 if ((err = tweak_crypt(pt, CC, T, xts)) != CRYPT_OK) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
115 return err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
117
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
118 /* Cm = first ptlen % 16 bytes of CC */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
119 for (i = 0; i < mo; i++) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
120 PP[i] = pt[16+i];
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
121 ct[16+i] = CC[i];
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 for (; i < 16; i++) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125 PP[i] = CC[i];
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128 /* Cm-1 = Tweak encrypt PP */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129 if ((err = tweak_crypt(PP, ct, T, xts)) != CRYPT_OK) {
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130 return err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
133
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134 return err;
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
135 }
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
136
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
137 #endif
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
138
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
139 /* $Source$ */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
140 /* $Revision$ */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
141 /* $Date$ */
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
142