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comparison libtomcrypt/src/encauth/eax/eax_init.c @ 1435:f849a5ca2efc

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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 0cbe8f6dbf9e
children 6dba84798cd5
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1434:27b9ddb06b09 1435:f849a5ca2efc
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 * 8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.com 9 * Tom St Denis, [email protected], http://libtom.org
10 */ 10 */
11 11
12 /** 12 /**
13 @file eax_init.c 13 @file eax_init.c
14 EAX implementation, initialized EAX state, by Tom St Denis 14 EAX implementation, initialized EAX state, by Tom St Denis
15 */ 15 */
16 #include "tomcrypt.h" 16 #include "tomcrypt.h"
17 17
18 #ifdef EAX_MODE 18 #ifdef LTC_EAX_MODE
19 19
20 /** 20 /**
21 Initialized an EAX state 21 Initialized an EAX state
22 @param eax [out] The EAX state to initialize 22 @param eax [out] The EAX state to initialize
23 @param cipher The index of the desired cipher 23 @param cipher The index of the desired cipher
64 XFREE(omac); 64 XFREE(omac);
65 } 65 }
66 return CRYPT_MEM; 66 return CRYPT_MEM;
67 } 67 }
68 68
69 /* N = OMAC_0K(nonce) */ 69 /* N = LTC_OMAC_0K(nonce) */
70 zeromem(buf, MAXBLOCKSIZE); 70 zeromem(buf, MAXBLOCKSIZE);
71 if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) { 71 if ((err = omac_init(omac, cipher, key, keylen)) != CRYPT_OK) {
72 goto LBL_ERR; 72 goto LBL_ERR;
73 } 73 }
74 74
84 len = sizeof(eax->N); 84 len = sizeof(eax->N);
85 if ((err = omac_done(omac, eax->N, &len)) != CRYPT_OK) { 85 if ((err = omac_done(omac, eax->N, &len)) != CRYPT_OK) {
86 goto LBL_ERR; 86 goto LBL_ERR;
87 } 87 }
88 88
89 /* H = OMAC_1K(header) */ 89 /* H = LTC_OMAC_1K(header) */
90 zeromem(buf, MAXBLOCKSIZE); 90 zeromem(buf, MAXBLOCKSIZE);
91 buf[blklen - 1] = 1; 91 buf[blklen - 1] = 1;
92 92
93 if ((err = omac_init(&eax->headeromac, cipher, key, keylen)) != CRYPT_OK) { 93 if ((err = omac_init(&eax->headeromac, cipher, key, keylen)) != CRYPT_OK) {
94 goto LBL_ERR; 94 goto LBL_ERR;
110 /* setup the CTR mode */ 110 /* setup the CTR mode */
111 if ((err = ctr_start(cipher, eax->N, key, keylen, 0, CTR_COUNTER_BIG_ENDIAN, &eax->ctr)) != CRYPT_OK) { 111 if ((err = ctr_start(cipher, eax->N, key, keylen, 0, CTR_COUNTER_BIG_ENDIAN, &eax->ctr)) != CRYPT_OK) {
112 goto LBL_ERR; 112 goto LBL_ERR;
113 } 113 }
114 114
115 /* setup the OMAC for the ciphertext */ 115 /* setup the LTC_OMAC for the ciphertext */
116 if ((err = omac_init(&eax->ctomac, cipher, key, keylen)) != CRYPT_OK) { 116 if ((err = omac_init(&eax->ctomac, cipher, key, keylen)) != CRYPT_OK) {
117 goto LBL_ERR; 117 goto LBL_ERR;
118 } 118 }
119 119
120 /* omac [2]_n */ 120 /* omac [2]_n */
137 return err; 137 return err;
138 } 138 }
139 139
140 #endif 140 #endif
141 141
142 /* $Source: /cvs/libtom/libtomcrypt/src/encauth/eax/eax_init.c,v $ */ 142 /* $Source$ */
143 /* $Revision: 1.5 $ */ 143 /* $Revision$ */
144 /* $Date: 2006/03/31 14:15:35 $ */ 144 /* $Date$ */