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Commit 414cb5e7 authored by Jussi Kivilinna's avatar Jussi Kivilinna Committed by Herbert Xu
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crypto: twofish-x86_64-3way - remove duplicated glue code and use shared glue code from glue_helper 

Now that shared glue code is available, convert twofish-x86_64-3way to use it.
Signed-off-by: default avatarJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 964263af
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Showing with 94 additions and 272 deletions
arch/x86/crypto/twofish_glue_3way.c
View file @ 414cb5e7
......@@ -3,11 +3,6 @@
*
* Copyright (c) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
*
* CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
* CTR part based on code (crypto/ctr.c) by:
* (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
*
* This program 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
......@@ -33,6 +28,7 @@
#include <crypto/algapi.h>
#include <crypto/twofish.h>
#include <crypto/b128ops.h>
#include <asm/crypto/glue_helper.h>
#include <crypto/lrw.h>
#include <crypto/xts.h>
......@@ -62,311 +58,136 @@ static inline void twofish_enc_blk_xor_3way(struct twofish_ctx *ctx, u8 *dst,
__twofish_enc_blk_3way(ctx, dst, src, true);
}
static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
void (*fn)(struct twofish_ctx *, u8 *, const u8 *),
void (*fn_3way)(struct twofish_ctx *, u8 *, const u8 *))
static void twofish_dec_blk_cbc_3way(void *ctx, u128 *dst, const u128 *src)
{
struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
unsigned int bsize = TF_BLOCK_SIZE;
unsigned int nbytes;
int err;
err = blkcipher_walk_virt(desc, walk);
while ((nbytes = walk->nbytes)) {
u8 *wsrc = walk->src.virt.addr;
u8 *wdst = walk->dst.virt.addr;
/* Process three block batch */
if (nbytes >= bsize * 3) {
do {
fn_3way(ctx, wdst, wsrc);
u128 ivs[2];
wsrc += bsize * 3;
wdst += bsize * 3;
nbytes -= bsize * 3;
} while (nbytes >= bsize * 3);
ivs[0] = src[0];
ivs[1] = src[1];
if (nbytes < bsize)
goto done;
}
/* Handle leftovers */
do {
fn(ctx, wdst, wsrc);
wsrc += bsize;
wdst += bsize;
nbytes -= bsize;
} while (nbytes >= bsize);
done:
err = blkcipher_walk_done(desc, walk, nbytes);
}
twofish_dec_blk_3way(ctx, (u8 *)dst, (u8 *)src);
return err;
u128_xor(&dst[1], &dst[1], &ivs[0]);
u128_xor(&dst[2], &dst[2], &ivs[1]);
}
static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
static void twofish_enc_blk_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv)
{
struct blkcipher_walk walk;
be128 ctrblk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_crypt(desc, &walk, twofish_enc_blk, twofish_enc_blk_3way);
}
if (dst != src)
*dst = *src;
static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct blkcipher_walk walk;
u128_to_be128(&ctrblk, iv);
u128_inc(iv);
blkcipher_walk_init(&walk, dst, src, nbytes);
return ecb_crypt(desc, &walk, twofish_dec_blk, twofish_dec_blk_3way);
twofish_enc_blk(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
u128_xor(dst, dst, (u128 *)&ctrblk);
}
static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
static void twofish_enc_blk_ctr_3way(void *ctx, u128 *dst, const u128 *src,
u128 *iv)
{
struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
unsigned int bsize = TF_BLOCK_SIZE;
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
u128 *iv = (u128 *)walk->iv;
do {
u128_xor(dst, src, iv);
twofish_enc_blk(ctx, (u8 *)dst, (u8 *)dst);
iv = dst;
src += 1;
dst += 1;
nbytes -= bsize;
} while (nbytes >= bsize);
u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
return nbytes;
}
be128 ctrblks[3];
static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
while ((nbytes = walk.nbytes)) {
nbytes = __cbc_encrypt(desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
return err;
}
static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
unsigned int bsize = TF_BLOCK_SIZE;
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
u128 ivs[3 - 1];
u128 last_iv;
/* Start of the last block. */
src += nbytes / bsize - 1;
dst += nbytes / bsize - 1;
last_iv = *src;
/* Process three block batch */
if (nbytes >= bsize * 3) {
do {
nbytes -= bsize * (3 - 1);
src -= 3 - 1;
dst -= 3 - 1;
ivs[0] = src[0];
ivs[1] = src[1];
twofish_dec_blk_3way(ctx, (u8 *)dst, (u8 *)src);
u128_xor(dst + 1, dst + 1, ivs + 0);
u128_xor(dst + 2, dst + 2, ivs + 1);
nbytes -= bsize;
if (nbytes < bsize)
goto done;
u128_xor(dst, dst, src - 1);
src -= 1;
dst -= 1;
} while (nbytes >= bsize * 3);
if (nbytes < bsize)
goto done;
}
/* Handle leftovers */
for (;;) {
twofish_dec_blk(ctx, (u8 *)dst, (u8 *)src);
nbytes -= bsize;
if (nbytes < bsize)
break;
u128_xor(dst, dst, src - 1);
src -= 1;
dst -= 1;
if (dst != src) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
}
done:
u128_xor(dst, dst, (u128 *)walk->iv);
*(u128 *)walk->iv = last_iv;
u128_to_be128(&ctrblks[0], iv);
u128_inc(iv);
u128_to_be128(&ctrblks[1], iv);
u128_inc(iv);
u128_to_be128(&ctrblks[2], iv);
u128_inc(iv);
return nbytes;
twofish_enc_blk_xor_3way(ctx, (u8 *)dst, (u8 *)ctrblks);
}
static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
static const struct common_glue_ctx twofish_enc = {
.num_funcs = 2,
.fpu_blocks_limit = -1,
.funcs = { {
.num_blocks = 3,
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_3way) }
}, {
.num_blocks = 1,
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk) }
} }
};
while ((nbytes = walk.nbytes)) {
nbytes = __cbc_decrypt(desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
static const struct common_glue_ctx twofish_ctr = {
.num_funcs = 2,
.fpu_blocks_limit = -1,
.funcs = { {
.num_blocks = 3,
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_ctr_3way) }
}, {
.num_blocks = 1,
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_enc_blk_ctr) }
} }
};
return err;
}
static const struct common_glue_ctx twofish_dec = {
.num_funcs = 2,
.fpu_blocks_limit = -1,
.funcs = { {
.num_blocks = 3,
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk_3way) }
}, {
.num_blocks = 1,
.fn_u = { .ecb = GLUE_FUNC_CAST(twofish_dec_blk) }
} }
};
static inline void u128_to_be128(be128 *dst, const u128 *src)
{
dst->a = cpu_to_be64(src->a);
dst->b = cpu_to_be64(src->b);
}
static const struct common_glue_ctx twofish_dec_cbc = {
.num_funcs = 2,
.fpu_blocks_limit = -1,
.funcs = { {
.num_blocks = 3,
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk_cbc_3way) }
}, {
.num_blocks = 1,
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(twofish_dec_blk) }
} }
};
static inline void be128_to_u128(u128 *dst, const be128 *src)
static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
dst->a = be64_to_cpu(src->a);
dst->b = be64_to_cpu(src->b);
return glue_ecb_crypt_128bit(&twofish_enc, desc, dst, src, nbytes);
}
static inline void u128_inc(u128 *i)
static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
i->b++;
if (!i->b)
i->a++;
return glue_ecb_crypt_128bit(&twofish_dec, desc, dst, src, nbytes);
}
static void ctr_crypt_final(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
u8 *ctrblk = walk->iv;
u8 keystream[TF_BLOCK_SIZE];
u8 *src = walk->src.virt.addr;
u8 *dst = walk->dst.virt.addr;
unsigned int nbytes = walk->nbytes;
twofish_enc_blk(ctx, keystream, ctrblk);
crypto_xor(keystream, src, nbytes);
memcpy(dst, keystream, nbytes);
crypto_inc(ctrblk, TF_BLOCK_SIZE);
return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(twofish_enc_blk), desc,
dst, src, nbytes);
}
static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
unsigned int bsize = TF_BLOCK_SIZE;
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
u128 ctrblk;
be128 ctrblocks[3];
be128_to_u128(&ctrblk, (be128 *)walk->iv);
/* Process three block batch */
if (nbytes >= bsize * 3) {
do {
if (dst != src) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
}
/* create ctrblks for parallel encrypt */
u128_to_be128(&ctrblocks[0], &ctrblk);
u128_inc(&ctrblk);
u128_to_be128(&ctrblocks[1], &ctrblk);
u128_inc(&ctrblk);
u128_to_be128(&ctrblocks[2], &ctrblk);
u128_inc(&ctrblk);
twofish_enc_blk_xor_3way(ctx, (u8 *)dst,
(u8 *)ctrblocks);
src += 3;
dst += 3;
nbytes -= bsize * 3;
} while (nbytes >= bsize * 3);
if (nbytes < bsize)
goto done;
}
/* Handle leftovers */
do {
if (dst != src)
*dst = *src;
u128_to_be128(&ctrblocks[0], &ctrblk);
u128_inc(&ctrblk);
twofish_enc_blk(ctx, (u8 *)ctrblocks, (u8 *)ctrblocks);
u128_xor(dst, dst, (u128 *)ctrblocks);
src += 1;
dst += 1;
nbytes -= bsize;
} while (nbytes >= bsize);
done:
u128_to_be128((be128 *)walk->iv, &ctrblk);
return nbytes;
return glue_cbc_decrypt_128bit(&twofish_dec_cbc, desc, dst, src,
nbytes);
}
static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt_block(desc, &walk, TF_BLOCK_SIZE);
while ((nbytes = walk.nbytes) >= TF_BLOCK_SIZE) {
nbytes = __ctr_crypt(desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
if (walk.nbytes) {
ctr_crypt_final(desc, &walk);
err = blkcipher_walk_done(desc, &walk, 0);
}
return err;
return glue_ctr_crypt_128bit(&twofish_ctr, desc, dst, src, nbytes);
}
static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
......
crypto/Kconfig
View file @ 414cb5e7
......@@ -935,6 +935,7 @@ config CRYPTO_TWOFISH_X86_64_3WAY
select CRYPTO_ALGAPI
select CRYPTO_TWOFISH_COMMON
select CRYPTO_TWOFISH_X86_64
select CRYPTO_GLUE_HELPER_X86
select CRYPTO_LRW
select CRYPTO_XTS
help
......
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