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comparison libtomcrypt/src/mac/omac/omac_init.c @ 1511:5916af64acd4 fuzz

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merge from main
author Matt Johnston <matt@ucc.asn.au>
date Sat, 17 Feb 2018 19:29:51 +0800
parents 6dba84798cd5
children
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1457:32f990cc96b1 1511:5916af64acd4
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 #include "tomcrypt.h" 9 #include "tomcrypt.h"
12 10
13 /** 11 /**
14 @file omac_init.c 12 @file omac_init.c
15 LTC_OMAC1 support, initialize state, by Tom St Denis 13 OMAC1 support, initialize state, by Tom St Denis
16 */ 14 */
17 15
18 16
19 #ifdef LTC_OMAC 17 #ifdef LTC_OMAC
20 18
21 /** 19 /**
22 Initialize an LTC_OMAC state 20 Initialize an OMAC state
23 @param omac The LTC_OMAC state to initialize 21 @param omac The OMAC state to initialize
24 @param cipher The index of the desired cipher 22 @param cipher The index of the desired cipher
25 @param key The secret key 23 @param key The secret key
26 @param keylen The length of the secret key (octets) 24 @param keylen The length of the secret key (octets)
27 @return CRYPT_OK if successful 25 @return CRYPT_OK if successful
28 */ 26 */
75 /* shift left */ 73 /* shift left */
76 for (y = 0; y < (len - 1); y++) { 74 for (y = 0; y < (len - 1); y++) {
77 omac->Lu[x][y] = ((omac->Lu[x][y] << 1) | (omac->Lu[x][y+1] >> 7)) & 255; 75 omac->Lu[x][y] = ((omac->Lu[x][y] << 1) | (omac->Lu[x][y+1] >> 7)) & 255;
78 } 76 }
79 omac->Lu[x][len - 1] = ((omac->Lu[x][len - 1] << 1) ^ (msb ? mask : 0)) & 255; 77 omac->Lu[x][len - 1] = ((omac->Lu[x][len - 1] << 1) ^ (msb ? mask : 0)) & 255;
80 78
81 /* copy up as require */ 79 /* copy up as require */
82 if (x == 0) { 80 if (x == 0) {
83 XMEMCPY(omac->Lu[1], omac->Lu[0], sizeof(omac->Lu[0])); 81 XMEMCPY(omac->Lu[1], omac->Lu[0], sizeof(omac->Lu[0]));
84 } 82 }
85 } 83 }
94 return CRYPT_OK; 92 return CRYPT_OK;
95 } 93 }
96 94
97 #endif 95 #endif
98 96
99 /* $Source$ */ 97 /* ref: $Format:%D$ */
100 /* $Revision$ */ 98 /* git commit: $Format:%H$ */
101 /* $Date$ */ 99 /* commit time: $Format:%ai$ */