2019-10-25 00:26:17 +02:00
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/* idea.h
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*
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2020-05-06 01:15:21 +02:00
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* Copyright (C) 2006-2020 wolfSSL Inc.
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2019-10-25 00:26:17 +02:00
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/*!
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\file wolfssl/wolfcrypt/idea.h
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*/
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#ifndef WOLF_CRYPT_IDEA_H
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#define WOLF_CRYPT_IDEA_H
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#include <libwolfssl/wolfcrypt/types.h>
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#ifdef HAVE_IDEA
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum {
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IDEA_MODULO = 0x10001, /* 2^16+1 */
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IDEA_2EXP16 = 0x10000, /* 2^16 */
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IDEA_MASK = 0xFFFF, /* 16 bits set to one */
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IDEA_ROUNDS = 8, /* number of rounds for IDEA */
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IDEA_SK_NUM = (6*IDEA_ROUNDS + 4), /* number of subkeys */
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IDEA_KEY_SIZE = 16, /* size of key in bytes */
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IDEA_BLOCK_SIZE = 8, /* size of IDEA blocks in bytes */
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IDEA_IV_SIZE = 8, /* size of IDEA IV in bytes */
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IDEA_ENCRYPTION = 0,
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IDEA_DECRYPTION = 1
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};
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/* IDEA encryption and decryption */
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typedef struct Idea {
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word32 reg[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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word32 tmp[IDEA_BLOCK_SIZE / sizeof(word32)]; /* for CBC mode */
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word16 skey[IDEA_SK_NUM]; /* 832 bits expanded key */
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} Idea;
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WOLFSSL_API int wc_IdeaSetKey(Idea *idea, const byte* key, word16 keySz,
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const byte *iv, int dir);
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WOLFSSL_API int wc_IdeaSetIV(Idea *idea, const byte* iv);
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WOLFSSL_API int wc_IdeaCipher(Idea *idea, byte* out, const byte* in);
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WOLFSSL_API int wc_IdeaCbcEncrypt(Idea *idea, byte* out,
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const byte* in, word32 len);
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WOLFSSL_API int wc_IdeaCbcDecrypt(Idea *idea, byte* out,
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const byte* in, word32 len);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* HAVE_IDEA */
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#endif /* WOLF_CRYPT_IDEA_H */
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