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comparison src/modes/ofb/ofb_encrypt.c @ 380:d5faf4814ddb libtomcrypt-orig libtomcrypt-1.16

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Update to LibTomCrypt 1.16
author Matt Johnston <matt@ucc.asn.au>
date Thu, 11 Jan 2007 02:22:00 +0000
parents 59400faa4b44
children
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280:59400faa4b44 380:d5faf4814ddb
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.org 9 * Tom St Denis, [email protected], http://libtomcrypt.com
10 */ 10 */
11 #include "tomcrypt.h" 11 #include "tomcrypt.h"
12 12
13 /** 13 /**
14 @file ofb_encrypt.c 14 @file ofb_encrypt.c
15 OFB implementation, encrypt data, Tom St Denis 15 OFB implementation, encrypt data, Tom St Denis
16 */ 16 */
17 17
18 #ifdef OFB 18 #ifdef LTC_OFB_MODE
19 19
20 /** 20 /**
21 OFB encrypt 21 OFB encrypt
22 @param pt Plaintext 22 @param pt Plaintext
23 @param ct [out] Ciphertext 23 @param ct [out] Ciphertext
41 return CRYPT_INVALID_ARG; 41 return CRYPT_INVALID_ARG;
42 } 42 }
43 43
44 while (len-- > 0) { 44 while (len-- > 0) {
45 if (ofb->padlen == ofb->blocklen) { 45 if (ofb->padlen == ofb->blocklen) {
46 cipher_descriptor[ofb->cipher].ecb_encrypt(ofb->IV, ofb->IV, &ofb->key); 46 if ((err = cipher_descriptor[ofb->cipher].ecb_encrypt(ofb->IV, ofb->IV, &ofb->key)) != CRYPT_OK) {
47 return err;
48 }
47 ofb->padlen = 0; 49 ofb->padlen = 0;
48 } 50 }
49 *ct++ = *pt++ ^ ofb->IV[ofb->padlen++]; 51 *ct++ = *pt++ ^ ofb->IV[(ofb->padlen)++];
50 } 52 }
51 return CRYPT_OK; 53 return CRYPT_OK;
52 } 54 }
53 55
54 #endif 56 #endif
55 57
56 /* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_encrypt.c,v $ */ 58 /* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_encrypt.c,v $ */
57 /* $Revision: 1.3 $ */ 59 /* $Revision: 1.7 $ */
58 /* $Date: 2005/05/05 14:35:59 $ */ 60 /* $Date: 2006/11/26 01:45:14 $ */