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1 /* crypto/aes/aes_cfb.c -*- mode:C; c-file-style: "eay" -*- */ | |
2 /* ==================================================================== | |
3 * Copyright (c) 2002-2006 The OpenSSL Project. All rights reserved. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions | |
7 * are met: | |
8 * | |
9 * 1. Redistributions of source code must retain the above copyright | |
10 * notice, this list of conditions and the following disclaimer. | |
11 * | |
12 * 2. Redistributions in binary form must reproduce the above copyright | |
13 * notice, this list of conditions and the following disclaimer in | |
14 * the documentation and/or other materials provided with the | |
15 * distribution. | |
16 * | |
17 * 3. All advertising materials mentioning features or use of this | |
18 * software must display the following acknowledgment: | |
19 * "This product includes software developed by the OpenSSL Project | |
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
21 * | |
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
23 * endorse or promote products derived from this software without | |
24 * prior written permission. For written permission, please contact | |
25 * openssl-core@openssl.org. | |
26 * | |
27 * 5. Products derived from this software may not be called "OpenSSL" | |
28 * nor may "OpenSSL" appear in their names without prior written | |
29 * permission of the OpenSSL Project. | |
30 * | |
31 * 6. Redistributions of any form whatsoever must retain the following | |
32 * acknowledgment: | |
33 * "This product includes software developed by the OpenSSL Project | |
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
35 * | |
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
47 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 * ==================================================================== | |
49 * | |
50 */ | |
51 | |
52 #include <openssl/aes.h> | |
53 #include <openssl/modes.h> | |
54 | |
55 /* The input and output encrypted as though 128bit cfb mode is being | |
56 * used. The extra state information to record how much of the | |
57 * 128bit block we have used is contained in *num; | |
58 */ | |
59 | |
60 void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out, | |
61 size_t length, const AES_KEY *key, | |
62 unsigned char *ivec, int *num, const int enc) { | |
63 | |
64 CRYPTO_cfb128_encrypt(in,out,length,key,ivec,num,enc,(block128_f)AES_enc
rypt); | |
65 } | |
66 | |
67 /* N.B. This expects the input to be packed, MS bit first */ | |
68 void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out, | |
69 size_t length, const AES_KEY *key, | |
70 unsigned char *ivec, int *num, const int enc) | |
71 { | |
72 CRYPTO_cfb128_1_encrypt(in,out,length,key,ivec,num,enc,(block128_f)AES_encry
pt); | |
73 } | |
74 | |
75 void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out, | |
76 size_t length, const AES_KEY *key, | |
77 unsigned char *ivec, int *num, const int enc) | |
78 { | |
79 CRYPTO_cfb128_8_encrypt(in,out,length,key,ivec,num,enc,(block128_f)AES_encry
pt); | |
80 } | |
81 | |
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