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comparison libtomcrypt/src/modes/cfb/cfb_encrypt.c @ 435:337c45621e81

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merge of 'a9b0496634cdd25647b65e585cc3240f3fa699ee' and 'c22be8b8f570b48e9662dac32c7b3e7148a42206'
author Matt Johnston <matt@ucc.asn.au>
date Thu, 22 Feb 2007 14:53:49 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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434:0aaaf68e97dc 435:337c45621e81
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 cfb_encrypt.c 14 @file cfb_encrypt.c
15 CFB implementation, encrypt data, Tom St Denis 15 CFB implementation, encrypt data, Tom St Denis
16 */ 16 */
17 17
18 #ifdef CFB 18 #ifdef LTC_CFB_MODE
19 19
20 /** 20 /**
21 CFB encrypt 21 CFB encrypt
22 @param pt Plaintext 22 @param pt Plaintext
23 @param ct [out] Ciphertext 23 @param ct [out] Ciphertext
43 return CRYPT_INVALID_ARG; 43 return CRYPT_INVALID_ARG;
44 } 44 }
45 45
46 while (len-- > 0) { 46 while (len-- > 0) {
47 if (cfb->padlen == cfb->blocklen) { 47 if (cfb->padlen == cfb->blocklen) {
48 cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key); 48 if ((err = cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key)) != CRYPT_OK) {
49 return err;
50 }
49 cfb->padlen = 0; 51 cfb->padlen = 0;
50 } 52 }
51 cfb->pad[cfb->padlen] = (*ct = *pt ^ cfb->IV[cfb->padlen]); 53 cfb->pad[cfb->padlen] = (*ct = *pt ^ cfb->IV[cfb->padlen]);
52 ++pt; 54 ++pt;
53 ++ct; 55 ++ct;
54 ++cfb->padlen; 56 ++(cfb->padlen);
55 } 57 }
56 return CRYPT_OK; 58 return CRYPT_OK;
57 } 59 }
58 60
59 #endif 61 #endif
60 62
61 /* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_encrypt.c,v $ */ 63 /* $Source: /cvs/libtom/libtomcrypt/src/modes/cfb/cfb_encrypt.c,v $ */
62 /* $Revision: 1.3 $ */ 64 /* $Revision: 1.7 $ */
63 /* $Date: 2005/05/05 14:35:59 $ */ 65 /* $Date: 2006/11/26 01:45:14 $ */