1 /* rc2.h
2  *
3  * Copyright (C) 2006-2021 wolfSSL Inc.
4  *
5  * This file is part of wolfSSL.
6  *
7  * wolfSSL is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * wolfSSL is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
20  */
21 
22 #ifndef WOLF_CRYPT_RC2_H
23 #define WOLF_CRYPT_RC2_H
24 
25 #include <wolfssl/wolfcrypt/types.h>
26 
27 #ifdef WC_RC2
28 
29 #ifdef __cplusplus
30     extern "C" {
31 #endif
32 
33 enum {
34     RC2_MAX_KEY_SIZE = 128, /* max effective key size, octets */
35     RC2_BLOCK_SIZE   = 8
36 };
37 
38 /* RC2 encryption and decryption */
39 typedef struct Rc2 {
40     ALIGN16 word16 key[RC2_MAX_KEY_SIZE/2];
41     ALIGN16 word32 reg[RC2_BLOCK_SIZE / sizeof(word32)];    /* for CBC mode */
42     ALIGN16 word32 tmp[RC2_BLOCK_SIZE / sizeof(word32)];    /* same         */
43     word32 keylen;      /* key length, octets */
44     word32 bits;        /* effective key length, bits */
45 } Rc2;
46 
47 WOLFSSL_API int wc_Rc2SetKey(Rc2* rc2, const byte* key, word32 length,
48                              const byte* iv, word32 bits);
49 WOLFSSL_API int wc_Rc2SetIV(Rc2* rc2, const byte* iv);
50 
51 /* RC2-ECB */
52 WOLFSSL_API int wc_Rc2EcbEncrypt(Rc2* rc2, byte* out,
53                                  const byte* in, word32 sz);
54 WOLFSSL_API int wc_Rc2EcbDecrypt(Rc2* rc2, byte* out,
55                                  const byte* in, word32 sz);
56 
57 /* RC2-CBC */
58 WOLFSSL_API int wc_Rc2CbcEncrypt(Rc2* rc2, byte* out,
59                                  const byte* in, word32 sz);
60 WOLFSSL_API int wc_Rc2CbcDecrypt(Rc2* rc2, byte* out,
61                                  const byte* in, word32 sz);
62 
63 #ifdef __cplusplus
64     } /* extern "C" */
65 #endif
66 
67 #endif /* WC_RC2 */
68 #endif /* WOLF_CRYPT_RC2_H */
69