[164] | 1 | /* idea.h
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| 2 | *
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| 3 | * Copyright (C) 2006-2015 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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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 02110-1301, USA
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| 20 | */
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| 21 |
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| 22 | #ifndef WOLF_CRYPT_IDEA_H
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| 23 | #define WOLF_CRYPT_IDEA_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 HAVE_IDEA
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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 | IDEA_MODULO = 0x10001, /* 2^16+1 */
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| 35 | IDEA_2EXP16 = 0x10000, /* 2^16 */
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| 36 | IDEA_MASK = 0xFFFF, /* 16 bits set to one */
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| 37 | IDEA_ROUNDS = 8, /* number of rounds for IDEA */
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| 38 | IDEA_SK_NUM = (6*IDEA_ROUNDS + 4), /* number of subkeys */
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| 39 | IDEA_KEY_SIZE = 16, /* size of key in bytes */
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| 40 | IDEA_BLOCK_SIZE = 8, /* size of IDEA blocks in bytes */
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| 41 | IDEA_IV_SIZE = 8, /* size of IDEA IV in bytes */
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| 42 | IDEA_ENCRYPTION = 0,
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| 43 | IDEA_DECRYPTION = 1
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| 44 | };
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| 45 |
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| 46 | /* IDEA encryption and decryption */
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| 47 | typedef struct Idea {
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| 48 | word32 reg[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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| 49 | word32 tmp[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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| 50 | word16 skey[IDEA_SK_NUM]; /* 832 bits expanded key */
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| 51 | } Idea;
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| 52 |
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| 53 | WOLFSSL_API int wc_IdeaSetKey(Idea *idea, const byte* key, word16 keySz,
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| 54 | const byte *iv, int dir);
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| 55 | WOLFSSL_API int wc_IdeaSetIV(Idea *idea, const byte* iv);
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| 56 | WOLFSSL_API void wc_IdeaCipher(Idea *idea, byte* out, const byte* in);
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| 57 | WOLFSSL_API int wc_IdeaCbcEncrypt(Idea *idea, byte* out,
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| 58 | const byte* in, word32 len);
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| 59 | WOLFSSL_API int wc_IdeaCbcDecrypt(Idea *idea, byte* out,
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| 60 | const byte* in, word32 len);
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| 61 | #ifdef __cplusplus
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| 62 | } /* extern "C" */
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| 63 | #endif
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| 64 |
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| 65 | #endif /* HAVE_IDEA */
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| 66 | #endif /* WOLF_CRYPT_IDEA_H */
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