Commit bc83b829 authored by Jussi Kivilinna's avatar Jussi Kivilinna Committed by Herbert Xu
Browse files

crypto: serpent - export common functions for x86_64/i386-sse2 assembler implementations 



Serpent SSE2 assembler implementations only provide 4-way/8-way parallel
functions and need setkey and one-block encrypt/decrypt functions.

CC: Dag Arne Osvik <osvik@ii.uib.no>
Signed-off-by: default avatarJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7fb7fe44

crypto/serpent.c

+22 −19
Original line number Diff line number Diff line
@@ -21,16 +21,12 @@ 
#include <asm/byteorder.h>

#include <linux/crypto.h>

#include <linux/types.h>

#include <crypto/serpent.h>



/* Key is padded to the maximum of 256 bits before round key generation.

 * Any key length <= 256 bits (32 bytes) is allowed by the algorithm.

 */



#define SERPENT_MIN_KEY_SIZE		  0

#define SERPENT_MAX_KEY_SIZE		 32

#define SERPENT_EXPKEY_WORDS		132

#define SERPENT_BLOCK_SIZE		 16



#define PHI 0x9e3779b9UL



#define keyiter(a,b,c,d,i,j) \
@@ -210,13 +206,7 @@ 
	x1 ^= x4;	x3 ^= x4;	x4 &= x0;	\

	x4 ^= x2;



struct serpent_ctx {

	u32 expkey[SERPENT_EXPKEY_WORDS];

};





static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key,

			  unsigned int keylen)

int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)

{

	struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);

	u32 *k = ctx->expkey;
@@ -359,12 +349,11 @@ static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, 


	return 0;

}

EXPORT_SYMBOL_GPL(serpent_setkey);



static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)

void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)

{

	struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);

	const u32

		*k = ctx->expkey;

	const u32 *k = ctx->expkey;

	const __le32 *s = (const __le32 *)src;

	__le32	*d = (__le32 *)dst;

	u32	r0, r1, r2, r3, r4;
@@ -418,12 +407,18 @@ static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) 
	d[2] = cpu_to_le32(r2);

	d[3] = cpu_to_le32(r3);

}

EXPORT_SYMBOL_GPL(__serpent_encrypt);



static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)

static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)

{

	struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);

	const u32

		*k = ((struct serpent_ctx *)ctx)->expkey;



	__serpent_encrypt(ctx, dst, src);

}



void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)

{

	const u32 *k = ctx->expkey;

	const __le32 *s = (const __le32 *)src;

	__le32	*d = (__le32 *)dst;

	u32	r0, r1, r2, r3, r4;
@@ -472,6 +467,14 @@ static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) 
	d[2] = cpu_to_le32(r1);

	d[3] = cpu_to_le32(r4);

}

EXPORT_SYMBOL_GPL(__serpent_decrypt);



static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)

{

	struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);



	__serpent_decrypt(ctx, dst, src);

}



static struct crypto_alg serpent_alg = {

	.cra_name		=	"serpent",

include/crypto/serpent.h

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/*

 * Common values for serpent algorithms

 */



#ifndef _CRYPTO_SERPENT_H

#define _CRYPTO_SERPENT_H



#include <linux/types.h>

#include <linux/crypto.h>



#define SERPENT_MIN_KEY_SIZE		  0

#define SERPENT_MAX_KEY_SIZE		 32

#define SERPENT_EXPKEY_WORDS		132

#define SERPENT_BLOCK_SIZE		 16



struct serpent_ctx {

	u32 expkey[SERPENT_EXPKEY_WORDS];

};



int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen);



void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src);

void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src);



#endif

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