1 | /* idea.h
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2 | *
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3 | * Copyright (C) 2006-2017 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 | /*!
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23 | \file wolfssl/wolfcrypt/idea.h
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24 | */
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25 |
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26 | #ifndef WOLF_CRYPT_IDEA_H
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27 | #define WOLF_CRYPT_IDEA_H
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28 |
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29 | #include <wolfssl/wolfcrypt/types.h>
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30 |
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31 | #ifdef HAVE_IDEA
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32 |
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33 | #ifdef __cplusplus
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34 | extern "C" {
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35 | #endif
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36 |
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37 | enum {
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38 | IDEA_MODULO = 0x10001, /* 2^16+1 */
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39 | IDEA_2EXP16 = 0x10000, /* 2^16 */
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40 | IDEA_MASK = 0xFFFF, /* 16 bits set to one */
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41 | IDEA_ROUNDS = 8, /* number of rounds for IDEA */
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42 | IDEA_SK_NUM = (6*IDEA_ROUNDS + 4), /* number of subkeys */
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43 | IDEA_KEY_SIZE = 16, /* size of key in bytes */
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44 | IDEA_BLOCK_SIZE = 8, /* size of IDEA blocks in bytes */
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45 | IDEA_IV_SIZE = 8, /* size of IDEA IV in bytes */
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46 | IDEA_ENCRYPTION = 0,
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47 | IDEA_DECRYPTION = 1
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48 | };
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49 |
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50 | /* IDEA encryption and decryption */
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51 | typedef struct Idea {
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52 | word32 reg[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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53 | word32 tmp[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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54 | word16 skey[IDEA_SK_NUM]; /* 832 bits expanded key */
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55 | } Idea;
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56 |
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57 | WOLFSSL_API int wc_IdeaSetKey(Idea *idea, const byte* key, word16 keySz,
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58 | const byte *iv, int dir);
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59 | WOLFSSL_API int wc_IdeaSetIV(Idea *idea, const byte* iv);
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60 | WOLFSSL_API int wc_IdeaCipher(Idea *idea, byte* out, const byte* in);
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61 | WOLFSSL_API int wc_IdeaCbcEncrypt(Idea *idea, byte* out,
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62 | const byte* in, word32 len);
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63 | WOLFSSL_API int wc_IdeaCbcDecrypt(Idea *idea, byte* out,
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64 | const byte* in, word32 len);
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65 | #ifdef __cplusplus
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66 | } /* extern "C" */
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67 | #endif
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68 |
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69 | #endif /* HAVE_IDEA */
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70 | #endif /* WOLF_CRYPT_IDEA_H */
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