/* crypto/evp/e_camellia.c -*- mode:C; c-file-style: "eay" -*- */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 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/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_CAMELLIA
#include <openssl/evp.h>
#include <openssl/err.h>
#include <string.h>
#include <assert.h>
#include <openssl/camellia.h>
#include "evp_locl.h"
#include "modes_lcl.h"

static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
	const unsigned char *iv, int enc);

/* Camellia subkey Structure */
typedef struct
	{
	CAMELLIA_KEY ks;
	block128_f block;
	union {
		cbc128_f cbc;
		ctr128_f ctr;
	} stream;
	} EVP_CAMELLIA_KEY;

#define MAXBITCHUNK	((size_t)1<<(sizeof(size_t)*8-4))

/* Attribute operation for Camellia */
#define data(ctx)	EVP_C_DATA(EVP_CAMELLIA_KEY,ctx)

#if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
/* ---------^^^ this is not a typo, just a way to detect that
 * assembler support was in general requested... */
#include "sparc_arch.h"

extern unsigned int OPENSSL_sparcv9cap_P[];

#define	SPARC_CMLL_CAPABLE	(OPENSSL_sparcv9cap_P[1] & CFR_CAMELLIA)

void	cmll_t4_set_key (const unsigned char *key, int bits,
				CAMELLIA_KEY *ks);
void	cmll_t4_encrypt (const unsigned char *in, unsigned char *out,
				const CAMELLIA_KEY *key);
void	cmll_t4_decrypt (const unsigned char *in, unsigned char *out,
				const CAMELLIA_KEY *key);

void	cmll128_t4_cbc_encrypt (const unsigned char *in, unsigned char *out,
				size_t len, const CAMELLIA_KEY *key,
				unsigned char *ivec);
void	cmll128_t4_cbc_decrypt (const unsigned char *in, unsigned char *out,
				size_t len, const CAMELLIA_KEY *key,
				unsigned char *ivec);
void	cmll256_t4_cbc_encrypt (const unsigned char *in, unsigned char *out,
				size_t len, const CAMELLIA_KEY *key,
				unsigned char *ivec);
void	cmll256_t4_cbc_decrypt (const unsigned char *in, unsigned char *out,
				size_t len, const CAMELLIA_KEY *key,
				unsigned char *ivec);
void	cmll128_t4_ctr32_encrypt (const unsigned char *in, unsigned char *out,
				size_t blocks, const CAMELLIA_KEY *key,
				unsigned char *ivec);
void	cmll256_t4_ctr32_encrypt (const unsigned char *in, unsigned char *out,
				size_t blocks, const CAMELLIA_KEY *key,
				unsigned char *ivec);

static int cmll_t4_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
		   const unsigned char *iv, int enc)
	{
	int ret, mode, bits;
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	mode = ctx->cipher->flags & EVP_CIPH_MODE;
	bits = ctx->key_len*8;

	cmll_t4_set_key(key, bits, &dat->ks);

	if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
	    && !enc)
		{
		    ret = 0;
		    dat->block	= (block128_f)cmll_t4_decrypt;
		    switch (bits) {
		    case 128:
			dat->stream.cbc	= mode==EVP_CIPH_CBC_MODE ?
						(cbc128_f)cmll128_t4_cbc_decrypt :
						NULL;
			break;
		    case 192:
		    case 256:
			dat->stream.cbc	= mode==EVP_CIPH_CBC_MODE ?
						(cbc128_f)cmll256_t4_cbc_decrypt :
						NULL;
			break;
		    default:
			ret = -1;
		    }
		}
	else	{
		    ret = 0;
		    dat->block	= (block128_f)cmll_t4_encrypt;
		    switch (bits) {
		    case 128:
			if (mode==EVP_CIPH_CBC_MODE)
				dat->stream.cbc	= (cbc128_f)cmll128_t4_cbc_encrypt;
			else if (mode==EVP_CIPH_CTR_MODE)
				dat->stream.ctr = (ctr128_f)cmll128_t4_ctr32_encrypt;
			else
				dat->stream.cbc = NULL;
			break;
		    case 192:
		    case 256:
			if (mode==EVP_CIPH_CBC_MODE)
				dat->stream.cbc	= (cbc128_f)cmll256_t4_cbc_encrypt;
			else if (mode==EVP_CIPH_CTR_MODE)
				dat->stream.ctr = (ctr128_f)cmll256_t4_ctr32_encrypt;
			else
				dat->stream.cbc = NULL;
			break;
		    default:
			ret = -1;
		    }
		}

	if(ret < 0)
		{
		EVPerr(EVP_F_CMLL_T4_INIT_KEY,EVP_R_CAMELLIA_KEY_SETUP_FAILED);
		return 0;
		}

	return 1;
	}

#define cmll_t4_cbc_cipher camellia_cbc_cipher
static int cmll_t4_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in, size_t len);

#define cmll_t4_ecb_cipher camellia_ecb_cipher 
static int cmll_t4_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in, size_t len);

#define cmll_t4_ofb_cipher camellia_ofb_cipher
static int cmll_t4_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len);

#define cmll_t4_cfb_cipher camellia_cfb_cipher
static int cmll_t4_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len);

#define cmll_t4_cfb8_cipher camellia_cfb8_cipher
static int cmll_t4_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len);

#define cmll_t4_cfb1_cipher camellia_cfb1_cipher
static int cmll_t4_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len);

#define cmll_t4_ctr_cipher camellia_ctr_cipher
static int cmll_t4_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
		const unsigned char *in, size_t len);

#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER cmll_t4_##keylen##_##mode = { \
	nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
	flags|EVP_CIPH_##MODE##_MODE,	\
	cmll_t4_init_key,		\
	cmll_t4_##mode##_cipher,	\
	NULL,				\
	sizeof(EVP_CAMELLIA_KEY),	\
	NULL,NULL,NULL,NULL }; \
static const EVP_CIPHER camellia_##keylen##_##mode = { \
	nid##_##keylen##_##nmode,blocksize,	\
	keylen/8,ivlen, \
	flags|EVP_CIPH_##MODE##_MODE,	\
	camellia_init_key,		\
	camellia_##mode##_cipher,	\
	NULL,				\
	sizeof(EVP_CAMELLIA_KEY),	\
	NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
{ return SPARC_CMLL_CAPABLE?&cmll_t4_##keylen##_##mode:&camellia_##keylen##_##mode; }

#else

#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER camellia_##keylen##_##mode = { \
	nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \
	flags|EVP_CIPH_##MODE##_MODE,	\
	camellia_init_key,		\
	camellia_##mode##_cipher,	\
	NULL,				\
	sizeof(EVP_CAMELLIA_KEY),	\
	NULL,NULL,NULL,NULL }; \
const EVP_CIPHER *EVP_camellia_##keylen##_##mode(void) \
{ return &camellia_##keylen##_##mode; }

#endif

#define BLOCK_CIPHER_generic_pack(nid,keylen,flags)		\
	BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)	\
	BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)	\
	BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)	\
	BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1)	\
	BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags)	\
	BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags)
#if 0 /* not yet, missing NID */
	BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags)
#endif

/* The subkey for Camellia is generated. */ 
static int camellia_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
	const unsigned char *iv, int enc)
	{
	int ret, mode;
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	ret=Camellia_set_key(key, ctx->key_len * 8, &dat->ks);
	if(ret < 0)
		{
		EVPerr(EVP_F_CAMELLIA_INIT_KEY,EVP_R_CAMELLIA_KEY_SETUP_FAILED);
		return 0;
		}

	mode = ctx->cipher->flags & EVP_CIPH_MODE;
	if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE)
	    && !enc)
		{
		dat->block	= (block128_f)Camellia_decrypt;
		dat->stream.cbc	= mode==EVP_CIPH_CBC_MODE ?
					(cbc128_f)Camellia_cbc_encrypt :
					NULL;
		}
	else
		{
		dat->block	= (block128_f)Camellia_encrypt;
		dat->stream.cbc	= mode==EVP_CIPH_CBC_MODE ?
					(cbc128_f)Camellia_cbc_encrypt :
					NULL;
		}


	return 1;
	}

static int camellia_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in, size_t len)
{
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	if (dat->stream.cbc)
		(*dat->stream.cbc)(in,out,len,&dat->ks,ctx->iv,ctx->encrypt);
	else if (ctx->encrypt)
		CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block);
	else
		CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block);

	return 1;
}

static int camellia_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in, size_t len)
{
	size_t	bl = ctx->cipher->block_size;
	size_t	i;
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	if (len<bl)	return 1;

	for (i=0,len-=bl;i<=len;i+=bl)
		(*dat->block)(in+i,out+i,&dat->ks);

	return 1;
}

static int camellia_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len)
{
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	CRYPTO_ofb128_encrypt(in,out,len,&dat->ks,
			ctx->iv,&ctx->num,dat->block);
	return 1;
}

static int camellia_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len)
{
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	CRYPTO_cfb128_encrypt(in,out,len,&dat->ks,
			ctx->iv,&ctx->num,ctx->encrypt,dat->block);
	return 1;
}

static int camellia_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len)
{
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	CRYPTO_cfb128_8_encrypt(in,out,len,&dat->ks,
			ctx->iv,&ctx->num,ctx->encrypt,dat->block);
	return 1;
}

static int camellia_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out,
	const unsigned char *in,size_t len)
{
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) {
		CRYPTO_cfb128_1_encrypt(in,out,len,&dat->ks,
			ctx->iv,&ctx->num,ctx->encrypt,dat->block);
		return 1;
	}

	while (len>=MAXBITCHUNK) {
		CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,&dat->ks,
			ctx->iv,&ctx->num,ctx->encrypt,dat->block);
		len-=MAXBITCHUNK;
	}
	if (len)
		CRYPTO_cfb128_1_encrypt(in,out,len*8,&dat->ks,
			ctx->iv,&ctx->num,ctx->encrypt,dat->block);
	
	return 1;
}

#if 0 /* not yet, missing NID */
static int camellia_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out,
		const unsigned char *in, size_t len)
{
	unsigned int num = ctx->num;
	EVP_CAMELLIA_KEY *dat = (EVP_CAMELLIA_KEY *)ctx->cipher_data;

	if (dat->stream.ctr)
		CRYPTO_ctr128_encrypt_ctr32(in,out,len,&dat->ks,
			ctx->iv,ctx->buf,&num,dat->stream.ctr);
	else
		CRYPTO_ctr128_encrypt(in,out,len,&dat->ks,
			ctx->iv,ctx->buf,&num,dat->block);
	ctx->num = (size_t)num;
	return 1;
}
#endif

BLOCK_CIPHER_generic_pack(NID_camellia,128,0)
BLOCK_CIPHER_generic_pack(NID_camellia,192,0)
BLOCK_CIPHER_generic_pack(NID_camellia,256,0)

#else

# ifdef PEDANTIC
static void *dummy=&dummy;
# endif

#endif