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/* idea.h
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/*!
\file wolfssl/wolfcrypt/idea.h
*/
#ifndef WOLF_CRYPT_IDEA_H
#define WOLF_CRYPT_IDEA_H
#include <wolfssl/wolfcrypt/types.h>
#ifdef HAVE_IDEA
#ifdef __cplusplus
extern "C" {
#endif
enum {
IDEA_MODULO = 0x10001, /* 2^16+1 */
IDEA_2EXP16 = 0x10000, /* 2^16 */
IDEA_MASK = 0xFFFF, /* 16 bits set to one */
IDEA_ROUNDS = 8, /* number of rounds for IDEA */
IDEA_SK_NUM = (6*IDEA_ROUNDS + 4), /* number of subkeys */
IDEA_KEY_SIZE = 16, /* size of key in bytes */
IDEA_BLOCK_SIZE = 8, /* size of IDEA blocks in bytes */
IDEA_IV_SIZE = 8, /* size of IDEA IV in bytes */
IDEA_ENCRYPTION = 0,
IDEA_DECRYPTION = 1
};
/* IDEA encryption and decryption */
typedef struct Idea {
word32 reg[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
word32 tmp[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
word16 skey[IDEA_SK_NUM]; /* 832 bits expanded key */
} Idea;
WOLFSSL_API int wc_IdeaSetKey(Idea *idea, const byte* key, word16 keySz,
const byte *iv, int dir);
WOLFSSL_API int wc_IdeaSetIV(Idea *idea, const byte* iv);
WOLFSSL_API int wc_IdeaCipher(Idea *idea, byte* out, const byte* in);
WOLFSSL_API int wc_IdeaCbcEncrypt(Idea *idea, byte* out,
const byte* in, word32 len);
WOLFSSL_API int wc_IdeaCbcDecrypt(Idea *idea, byte* out,
const byte* in, word32 len);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HAVE_IDEA */
#endif /* WOLF_CRYPT_IDEA_H */
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