cmll_misc.c

开源的ssl算法openssl,版本0.9.8H

/* crypto/camellia/camellia_misc.c -*- mode:C; c-file-style: "eay" -*- */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 *    distribution.
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 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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 *    [e-mail].
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 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
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#include <openssl/opensslv.h>
#include <openssl/camellia.h>
#include "cmll_locl.h"

const char CAMELLIA_version[]="CAMELLIA" OPENSSL_VERSION_PTEXT;

int Camellia_set_key(const unsigned char *userKey, const int bits,
	CAMELLIA_KEY *key)
	{
	if (!userKey || !key)
		{
		return -1;
		}
	
	switch(bits)
		{
	case 128:
		camellia_setup128(userKey, (unsigned int *)key->rd_key);
		key->enc = camellia_encrypt128;
		key->dec = camellia_decrypt128;
		break;
	case 192:
		camellia_setup192(userKey, (unsigned int *)key->rd_key);
		key->enc = camellia_encrypt256;
		key->dec = camellia_decrypt256;
		break;
	case 256:
		camellia_setup256(userKey, (unsigned int *)key->rd_key);
		key->enc = camellia_encrypt256;
		key->dec = camellia_decrypt256;
		break;
	default:
		return -2;
		}
	
	key->bitLength = bits;
	return 0;
	}

void Camellia_encrypt(const unsigned char *in, unsigned char *out,
	const CAMELLIA_KEY *key)
	{
	u32 tmp[CAMELLIA_BLOCK_SIZE/sizeof(u32)];
	const union { long one; char little; } camellia_endian = {1};

	memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
	if (camellia_endian.little) SWAP4WORD(tmp);
	key->enc(key->rd_key, tmp);
	if (camellia_endian.little) SWAP4WORD(tmp);
	memcpy(out, tmp, CAMELLIA_BLOCK_SIZE);
	}

void Camellia_decrypt(const unsigned char *in, unsigned char *out,
	const CAMELLIA_KEY *key)
	{
	u32 tmp[CAMELLIA_BLOCK_SIZE/sizeof(u32)];
	const union { long one; char little; } camellia_endian = {1};

	memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
	if (camellia_endian.little) SWAP4WORD(tmp);
	key->dec(key->rd_key, tmp);
	if (camellia_endian.little) SWAP4WORD(tmp);
	memcpy(out, tmp, CAMELLIA_BLOCK_SIZE);
	}