1 | /* rc2.h
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2 | *
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3 | * Copyright (C) 2006-2020 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL.
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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20 | */
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21 |
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22 | #ifndef WOLF_CRYPT_RC2_H
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23 | #define WOLF_CRYPT_RC2_H
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24 |
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25 | #include <wolfssl/wolfcrypt/types.h>
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26 |
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27 | #ifdef WC_RC2
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28 |
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29 | #ifdef __cplusplus
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30 | extern "C" {
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31 | #endif
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32 |
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33 | enum {
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34 | RC2_MAX_KEY_SIZE = 128, /* max effective key size, octets */
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35 | RC2_BLOCK_SIZE = 8
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36 | };
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37 |
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38 | /* RC2 encryption and decryption */
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39 | typedef struct Rc2 {
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40 | ALIGN16 word16 key[RC2_MAX_KEY_SIZE/2];
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41 | ALIGN16 word32 reg[RC2_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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42 | ALIGN16 word32 tmp[RC2_BLOCK_SIZE / sizeof(word32)]; /* same */
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43 | word32 keylen; /* key length, octets */
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44 | word32 bits; /* effective key length, bits */
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45 | } Rc2;
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46 |
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47 | WOLFSSL_API int wc_Rc2SetKey(Rc2* rc2, const byte* key, word32 length,
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48 | const byte* iv, word32 bits);
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49 | WOLFSSL_API int wc_Rc2SetIV(Rc2* rc2, const byte* iv);
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50 |
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51 | /* RC2-ECB */
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52 | WOLFSSL_API int wc_Rc2EcbEncrypt(Rc2* rc2, byte* out,
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53 | const byte* in, word32 sz);
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54 | WOLFSSL_API int wc_Rc2EcbDecrypt(Rc2* rc2, byte* out,
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55 | const byte* in, word32 sz);
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56 |
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57 | /* RC2-CBC */
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58 | WOLFSSL_API int wc_Rc2CbcEncrypt(Rc2* rc2, byte* out,
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59 | const byte* in, word32 sz);
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60 | WOLFSSL_API int wc_Rc2CbcDecrypt(Rc2* rc2, byte* out,
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61 | const byte* in, word32 sz);
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62 |
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63 | #ifdef __cplusplus
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64 | } /* extern "C" */
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65 | #endif
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66 |
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67 | #endif /* WC_RC2 */
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68 | #endif /* WOLF_CRYPT_RC2_H */
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