2011-11-09 07:26:25 -07:00
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/*
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* Glue Code for SSE2 assembler versions of Serpent Cipher
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*
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* Copyright (c) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
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*
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* Glue code based on aesni-intel_glue.c by:
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* Copyright (C) 2008, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
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* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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* CTR part based on code (crypto/ctr.c) by:
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* (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
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*
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* This program 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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* This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#include <linux/module.h>
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#include <linux/hardirq.h>
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#include <linux/types.h>
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#include <linux/crypto.h>
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#include <linux/err.h>
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#include <crypto/algapi.h>
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#include <crypto/serpent.h>
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#include <crypto/cryptd.h>
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#include <crypto/b128ops.h>
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#include <crypto/ctr.h>
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2011-11-09 07:26:36 -07:00
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#include <crypto/lrw.h>
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2011-11-09 07:26:41 -07:00
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#include <crypto/xts.h>
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2011-11-09 07:26:25 -07:00
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#include <asm/i387.h>
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2012-06-13 20:09:03 -06:00
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#include <asm/serpent-sse2.h>
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2011-11-09 07:26:25 -07:00
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#include <crypto/scatterwalk.h>
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#include <linux/workqueue.h>
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#include <linux/spinlock.h>
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struct async_serpent_ctx {
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struct cryptd_ablkcipher *cryptd_tfm;
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};
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static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
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{
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if (fpu_enabled)
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return true;
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/* SSE2 is only used when chunk to be processed is large enough, so
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* do not enable FPU until it is necessary.
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*/
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if (nbytes < SERPENT_BLOCK_SIZE * SERPENT_PARALLEL_BLOCKS)
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return false;
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kernel_fpu_begin();
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return true;
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}
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static inline void serpent_fpu_end(bool fpu_enabled)
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{
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if (fpu_enabled)
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kernel_fpu_end();
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}
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static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
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bool enc)
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{
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bool fpu_enabled = false;
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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unsigned int nbytes;
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int err;
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err = blkcipher_walk_virt(desc, walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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while ((nbytes = walk->nbytes)) {
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u8 *wsrc = walk->src.virt.addr;
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u8 *wdst = walk->dst.virt.addr;
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fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
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/* Process multi-block batch */
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if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
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do {
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if (enc)
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serpent_enc_blk_xway(ctx, wdst, wsrc);
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else
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serpent_dec_blk_xway(ctx, wdst, wsrc);
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wsrc += bsize * SERPENT_PARALLEL_BLOCKS;
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wdst += bsize * SERPENT_PARALLEL_BLOCKS;
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nbytes -= bsize * SERPENT_PARALLEL_BLOCKS;
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} while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
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if (nbytes < bsize)
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goto done;
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}
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/* Handle leftovers */
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do {
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if (enc)
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__serpent_encrypt(ctx, wdst, wsrc);
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else
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__serpent_decrypt(ctx, wdst, wsrc);
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wsrc += bsize;
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wdst += bsize;
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nbytes -= bsize;
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} while (nbytes >= bsize);
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done:
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err = blkcipher_walk_done(desc, walk, nbytes);
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}
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serpent_fpu_end(fpu_enabled);
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return err;
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}
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static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_crypt(desc, &walk, true);
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}
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static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return ecb_crypt(desc, &walk, false);
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}
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static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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unsigned int nbytes = walk->nbytes;
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u128 *src = (u128 *)walk->src.virt.addr;
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u128 *dst = (u128 *)walk->dst.virt.addr;
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u128 *iv = (u128 *)walk->iv;
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do {
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u128_xor(dst, src, iv);
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__serpent_encrypt(ctx, (u8 *)dst, (u8 *)dst);
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iv = dst;
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src += 1;
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dst += 1;
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nbytes -= bsize;
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} while (nbytes >= bsize);
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u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
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return nbytes;
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}
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static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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while ((nbytes = walk.nbytes)) {
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nbytes = __cbc_encrypt(desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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return err;
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}
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static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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unsigned int nbytes = walk->nbytes;
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u128 *src = (u128 *)walk->src.virt.addr;
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u128 *dst = (u128 *)walk->dst.virt.addr;
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u128 ivs[SERPENT_PARALLEL_BLOCKS - 1];
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u128 last_iv;
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int i;
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/* Start of the last block. */
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src += nbytes / bsize - 1;
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dst += nbytes / bsize - 1;
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last_iv = *src;
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/* Process multi-block batch */
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if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
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do {
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nbytes -= bsize * (SERPENT_PARALLEL_BLOCKS - 1);
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src -= SERPENT_PARALLEL_BLOCKS - 1;
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dst -= SERPENT_PARALLEL_BLOCKS - 1;
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for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++)
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ivs[i] = src[i];
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serpent_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
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for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++)
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u128_xor(dst + (i + 1), dst + (i + 1), ivs + i);
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nbytes -= bsize;
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if (nbytes < bsize)
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goto done;
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u128_xor(dst, dst, src - 1);
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src -= 1;
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dst -= 1;
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} while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
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if (nbytes < bsize)
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goto done;
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}
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/* Handle leftovers */
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for (;;) {
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__serpent_decrypt(ctx, (u8 *)dst, (u8 *)src);
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nbytes -= bsize;
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if (nbytes < bsize)
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break;
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u128_xor(dst, dst, src - 1);
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src -= 1;
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dst -= 1;
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}
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done:
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u128_xor(dst, dst, (u128 *)walk->iv);
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*(u128 *)walk->iv = last_iv;
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return nbytes;
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}
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static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
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struct scatterlist *src, unsigned int nbytes)
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{
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bool fpu_enabled = false;
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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while ((nbytes = walk.nbytes)) {
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fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
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nbytes = __cbc_decrypt(desc, &walk);
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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serpent_fpu_end(fpu_enabled);
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return err;
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}
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static inline void u128_to_be128(be128 *dst, const u128 *src)
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{
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dst->a = cpu_to_be64(src->a);
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dst->b = cpu_to_be64(src->b);
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}
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static inline void be128_to_u128(u128 *dst, const be128 *src)
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{
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dst->a = be64_to_cpu(src->a);
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dst->b = be64_to_cpu(src->b);
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}
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static inline void u128_inc(u128 *i)
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{
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i->b++;
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if (!i->b)
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i->a++;
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}
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static void ctr_crypt_final(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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u8 *ctrblk = walk->iv;
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u8 keystream[SERPENT_BLOCK_SIZE];
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u8 *src = walk->src.virt.addr;
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u8 *dst = walk->dst.virt.addr;
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unsigned int nbytes = walk->nbytes;
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__serpent_encrypt(ctx, keystream, ctrblk);
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crypto_xor(keystream, src, nbytes);
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memcpy(dst, keystream, nbytes);
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crypto_inc(ctrblk, SERPENT_BLOCK_SIZE);
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}
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static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
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struct blkcipher_walk *walk)
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{
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struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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const unsigned int bsize = SERPENT_BLOCK_SIZE;
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unsigned int nbytes = walk->nbytes;
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u128 *src = (u128 *)walk->src.virt.addr;
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u128 *dst = (u128 *)walk->dst.virt.addr;
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u128 ctrblk;
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be128 ctrblocks[SERPENT_PARALLEL_BLOCKS];
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int i;
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be128_to_u128(&ctrblk, (be128 *)walk->iv);
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/* Process multi-block batch */
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if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) {
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do {
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/* create ctrblks for parallel encrypt */
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for (i = 0; i < SERPENT_PARALLEL_BLOCKS; i++) {
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if (dst != src)
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dst[i] = src[i];
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u128_to_be128(&ctrblocks[i], &ctrblk);
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u128_inc(&ctrblk);
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}
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serpent_enc_blk_xway_xor(ctx, (u8 *)dst,
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(u8 *)ctrblocks);
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src += SERPENT_PARALLEL_BLOCKS;
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dst += SERPENT_PARALLEL_BLOCKS;
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nbytes -= bsize * SERPENT_PARALLEL_BLOCKS;
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} while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS);
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if (nbytes < bsize)
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goto done;
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}
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/* Handle leftovers */
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do {
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if (dst != src)
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*dst = *src;
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u128_to_be128(&ctrblocks[0], &ctrblk);
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u128_inc(&ctrblk);
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__serpent_encrypt(ctx, (u8 *)ctrblocks, (u8 *)ctrblocks);
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u128_xor(dst, dst, (u128 *)ctrblocks);
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src += 1;
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dst += 1;
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nbytes -= bsize;
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} while (nbytes >= bsize);
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done:
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|
|
u128_to_be128((be128 *)walk->iv, &ctrblk);
|
|
|
|
return nbytes;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
bool fpu_enabled = false;
|
|
|
|
struct blkcipher_walk walk;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
blkcipher_walk_init(&walk, dst, src, nbytes);
|
|
|
|
err = blkcipher_walk_virt_block(desc, &walk, SERPENT_BLOCK_SIZE);
|
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
|
|
|
|
|
while ((nbytes = walk.nbytes) >= SERPENT_BLOCK_SIZE) {
|
|
|
|
fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes);
|
|
|
|
nbytes = __ctr_crypt(desc, &walk);
|
|
|
|
err = blkcipher_walk_done(desc, &walk, nbytes);
|
|
|
|
}
|
|
|
|
|
|
|
|
serpent_fpu_end(fpu_enabled);
|
|
|
|
|
|
|
|
if (walk.nbytes) {
|
|
|
|
ctr_crypt_final(desc, &walk);
|
|
|
|
err = blkcipher_walk_done(desc, &walk, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2011-11-09 07:26:36 -07:00
|
|
|
struct crypt_priv {
|
|
|
|
struct serpent_ctx *ctx;
|
|
|
|
bool fpu_enabled;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
const unsigned int bsize = SERPENT_BLOCK_SIZE;
|
|
|
|
struct crypt_priv *ctx = priv;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
|
|
|
|
|
|
|
|
if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
|
|
|
|
serpent_enc_blk_xway(ctx->ctx, srcdst, srcdst);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
|
|
|
|
__serpent_encrypt(ctx->ctx, srcdst, srcdst);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
const unsigned int bsize = SERPENT_BLOCK_SIZE;
|
|
|
|
struct crypt_priv *ctx = priv;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
|
|
|
|
|
|
|
|
if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
|
|
|
|
serpent_dec_blk_xway(ctx->ctx, srcdst, srcdst);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
|
|
|
|
__serpent_decrypt(ctx->ctx, srcdst, srcdst);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct serpent_lrw_ctx {
|
|
|
|
struct lrw_table_ctx lrw_table;
|
|
|
|
struct serpent_ctx serpent_ctx;
|
|
|
|
};
|
|
|
|
|
|
|
|
static int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
|
|
|
|
unsigned int keylen)
|
|
|
|
{
|
|
|
|
struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = __serpent_setkey(&ctx->serpent_ctx, key, keylen -
|
|
|
|
SERPENT_BLOCK_SIZE);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
return lrw_init_table(&ctx->lrw_table, key + keylen -
|
|
|
|
SERPENT_BLOCK_SIZE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
|
be128 buf[SERPENT_PARALLEL_BLOCKS];
|
|
|
|
struct crypt_priv crypt_ctx = {
|
|
|
|
.ctx = &ctx->serpent_ctx,
|
|
|
|
.fpu_enabled = false,
|
|
|
|
};
|
|
|
|
struct lrw_crypt_req req = {
|
|
|
|
.tbuf = buf,
|
|
|
|
.tbuflen = sizeof(buf),
|
|
|
|
|
|
|
|
.table_ctx = &ctx->lrw_table,
|
|
|
|
.crypt_ctx = &crypt_ctx,
|
|
|
|
.crypt_fn = encrypt_callback,
|
|
|
|
};
|
|
|
|
int ret;
|
|
|
|
|
2011-11-09 10:44:12 -07:00
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
2011-11-09 07:26:36 -07:00
|
|
|
ret = lrw_crypt(desc, dst, src, nbytes, &req);
|
|
|
|
serpent_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
|
be128 buf[SERPENT_PARALLEL_BLOCKS];
|
|
|
|
struct crypt_priv crypt_ctx = {
|
|
|
|
.ctx = &ctx->serpent_ctx,
|
|
|
|
.fpu_enabled = false,
|
|
|
|
};
|
|
|
|
struct lrw_crypt_req req = {
|
|
|
|
.tbuf = buf,
|
|
|
|
.tbuflen = sizeof(buf),
|
|
|
|
|
|
|
|
.table_ctx = &ctx->lrw_table,
|
|
|
|
.crypt_ctx = &crypt_ctx,
|
|
|
|
.crypt_fn = decrypt_callback,
|
|
|
|
};
|
|
|
|
int ret;
|
|
|
|
|
2011-11-09 10:44:12 -07:00
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
2011-11-09 07:26:36 -07:00
|
|
|
ret = lrw_crypt(desc, dst, src, nbytes, &req);
|
|
|
|
serpent_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void lrw_exit_tfm(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
|
|
|
|
lrw_free_table(&ctx->lrw_table);
|
|
|
|
}
|
|
|
|
|
2011-11-09 07:26:41 -07:00
|
|
|
struct serpent_xts_ctx {
|
|
|
|
struct serpent_ctx tweak_ctx;
|
|
|
|
struct serpent_ctx crypt_ctx;
|
|
|
|
};
|
|
|
|
|
|
|
|
static int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
|
|
|
|
unsigned int keylen)
|
|
|
|
{
|
|
|
|
struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
u32 *flags = &tfm->crt_flags;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
/* key consists of keys of equal size concatenated, therefore
|
|
|
|
* the length must be even
|
|
|
|
*/
|
|
|
|
if (keylen % 2) {
|
|
|
|
*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* first half of xts-key is for crypt */
|
|
|
|
err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
/* second half of xts-key is for tweak */
|
|
|
|
return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
|
be128 buf[SERPENT_PARALLEL_BLOCKS];
|
|
|
|
struct crypt_priv crypt_ctx = {
|
|
|
|
.ctx = &ctx->crypt_ctx,
|
|
|
|
.fpu_enabled = false,
|
|
|
|
};
|
|
|
|
struct xts_crypt_req req = {
|
|
|
|
.tbuf = buf,
|
|
|
|
.tbuflen = sizeof(buf),
|
|
|
|
|
|
|
|
.tweak_ctx = &ctx->tweak_ctx,
|
|
|
|
.tweak_fn = XTS_TWEAK_CAST(__serpent_encrypt),
|
|
|
|
.crypt_ctx = &crypt_ctx,
|
|
|
|
.crypt_fn = encrypt_callback,
|
|
|
|
};
|
|
|
|
int ret;
|
|
|
|
|
2011-11-09 10:44:12 -07:00
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
2011-11-09 07:26:41 -07:00
|
|
|
ret = xts_crypt(desc, dst, src, nbytes, &req);
|
|
|
|
serpent_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
|
struct scatterlist *src, unsigned int nbytes)
|
|
|
|
{
|
|
|
|
struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
|
be128 buf[SERPENT_PARALLEL_BLOCKS];
|
|
|
|
struct crypt_priv crypt_ctx = {
|
|
|
|
.ctx = &ctx->crypt_ctx,
|
|
|
|
.fpu_enabled = false,
|
|
|
|
};
|
|
|
|
struct xts_crypt_req req = {
|
|
|
|
.tbuf = buf,
|
|
|
|
.tbuflen = sizeof(buf),
|
|
|
|
|
|
|
|
.tweak_ctx = &ctx->tweak_ctx,
|
|
|
|
.tweak_fn = XTS_TWEAK_CAST(__serpent_encrypt),
|
|
|
|
.crypt_ctx = &crypt_ctx,
|
|
|
|
.crypt_fn = decrypt_callback,
|
|
|
|
};
|
|
|
|
int ret;
|
|
|
|
|
2011-11-09 10:44:12 -07:00
|
|
|
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
2011-11-09 07:26:41 -07:00
|
|
|
ret = xts_crypt(desc, dst, src, nbytes, &req);
|
|
|
|
serpent_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-11-09 07:26:25 -07:00
|
|
|
static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
|
|
|
|
unsigned int key_len)
|
|
|
|
{
|
|
|
|
struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
|
|
struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
|
|
|
|
crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm)
|
|
|
|
& CRYPTO_TFM_REQ_MASK);
|
|
|
|
err = crypto_ablkcipher_setkey(child, key, key_len);
|
|
|
|
crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child)
|
|
|
|
& CRYPTO_TFM_RES_MASK);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __ablk_encrypt(struct ablkcipher_request *req)
|
|
|
|
{
|
|
|
|
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
|
|
|
|
struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
|
|
struct blkcipher_desc desc;
|
|
|
|
|
|
|
|
desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
|
|
|
|
desc.info = req->info;
|
|
|
|
desc.flags = 0;
|
|
|
|
|
|
|
|
return crypto_blkcipher_crt(desc.tfm)->encrypt(
|
|
|
|
&desc, req->dst, req->src, req->nbytes);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ablk_encrypt(struct ablkcipher_request *req)
|
|
|
|
{
|
|
|
|
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
|
|
|
|
struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
|
|
|
|
|
|
if (!irq_fpu_usable()) {
|
|
|
|
struct ablkcipher_request *cryptd_req =
|
|
|
|
ablkcipher_request_ctx(req);
|
|
|
|
|
|
|
|
memcpy(cryptd_req, req, sizeof(*req));
|
|
|
|
ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
|
|
|
|
|
|
|
|
return crypto_ablkcipher_encrypt(cryptd_req);
|
|
|
|
} else {
|
|
|
|
return __ablk_encrypt(req);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ablk_decrypt(struct ablkcipher_request *req)
|
|
|
|
{
|
|
|
|
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
|
|
|
|
struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
|
|
|
|
|
|
if (!irq_fpu_usable()) {
|
|
|
|
struct ablkcipher_request *cryptd_req =
|
|
|
|
ablkcipher_request_ctx(req);
|
|
|
|
|
|
|
|
memcpy(cryptd_req, req, sizeof(*req));
|
|
|
|
ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
|
|
|
|
|
|
|
|
return crypto_ablkcipher_decrypt(cryptd_req);
|
|
|
|
} else {
|
|
|
|
struct blkcipher_desc desc;
|
|
|
|
|
|
|
|
desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm);
|
|
|
|
desc.info = req->info;
|
|
|
|
desc.flags = 0;
|
|
|
|
|
|
|
|
return crypto_blkcipher_crt(desc.tfm)->decrypt(
|
|
|
|
&desc, req->dst, req->src, req->nbytes);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ablk_exit(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct async_serpent_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
|
|
|
|
cryptd_free_ablkcipher(ctx->cryptd_tfm);
|
|
|
|
}
|
|
|
|
|
2012-02-17 13:48:53 -07:00
|
|
|
static int ablk_init(struct crypto_tfm *tfm)
|
2011-11-09 07:26:25 -07:00
|
|
|
{
|
|
|
|
struct async_serpent_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
struct cryptd_ablkcipher *cryptd_tfm;
|
2012-02-17 13:48:53 -07:00
|
|
|
char drv_name[CRYPTO_MAX_ALG_NAME];
|
2011-11-09 07:26:25 -07:00
|
|
|
|
2012-02-17 13:48:53 -07:00
|
|
|
snprintf(drv_name, sizeof(drv_name), "__driver-%s",
|
|
|
|
crypto_tfm_alg_driver_name(tfm));
|
2012-02-17 13:48:37 -07:00
|
|
|
|
2012-02-17 13:48:53 -07:00
|
|
|
cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, 0, 0);
|
2012-02-17 13:48:37 -07:00
|
|
|
if (IS_ERR(cryptd_tfm))
|
|
|
|
return PTR_ERR(cryptd_tfm);
|
|
|
|
|
2012-02-17 13:48:53 -07:00
|
|
|
ctx->cryptd_tfm = cryptd_tfm;
|
|
|
|
tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
|
|
|
|
crypto_ablkcipher_reqsize(&cryptd_tfm->base);
|
2012-02-17 13:48:37 -07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct crypto_alg serpent_algs[10] = { {
|
|
|
|
.cra_name = "__ecb-serpent-sse2",
|
|
|
|
.cra_driver_name = "__driver-ecb-serpent-sse2",
|
|
|
|
.cra_priority = 0,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_blkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[0].cra_list),
|
|
|
|
.cra_u = {
|
|
|
|
.blkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE,
|
|
|
|
.setkey = serpent_setkey,
|
|
|
|
.encrypt = ecb_encrypt,
|
|
|
|
.decrypt = ecb_decrypt,
|
|
|
|
},
|
|
|
|
},
|
|
|
|
}, {
|
|
|
|
.cra_name = "__cbc-serpent-sse2",
|
|
|
|
.cra_driver_name = "__driver-cbc-serpent-sse2",
|
|
|
|
.cra_priority = 0,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_blkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[1].cra_list),
|
|
|
|
.cra_u = {
|
|
|
|
.blkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE,
|
|
|
|
.setkey = serpent_setkey,
|
|
|
|
.encrypt = cbc_encrypt,
|
|
|
|
.decrypt = cbc_decrypt,
|
|
|
|
},
|
|
|
|
},
|
|
|
|
}, {
|
|
|
|
.cra_name = "__ctr-serpent-sse2",
|
|
|
|
.cra_driver_name = "__driver-ctr-serpent-sse2",
|
|
|
|
.cra_priority = 0,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
|
.cra_blocksize = 1,
|
|
|
|
.cra_ctxsize = sizeof(struct serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_blkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[2].cra_list),
|
|
|
|
.cra_u = {
|
|
|
|
.blkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = serpent_setkey,
|
|
|
|
.encrypt = ctr_crypt,
|
|
|
|
.decrypt = ctr_crypt,
|
|
|
|
},
|
|
|
|
},
|
|
|
|
}, {
|
|
|
|
.cra_name = "__lrw-serpent-sse2",
|
|
|
|
.cra_driver_name = "__driver-lrw-serpent-sse2",
|
|
|
|
.cra_priority = 0,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct serpent_lrw_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_blkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[3].cra_list),
|
|
|
|
.cra_exit = lrw_exit_tfm,
|
|
|
|
.cra_u = {
|
|
|
|
.blkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE +
|
|
|
|
SERPENT_BLOCK_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE +
|
|
|
|
SERPENT_BLOCK_SIZE,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = lrw_serpent_setkey,
|
|
|
|
.encrypt = lrw_encrypt,
|
|
|
|
.decrypt = lrw_decrypt,
|
|
|
|
},
|
|
|
|
},
|
|
|
|
}, {
|
|
|
|
.cra_name = "__xts-serpent-sse2",
|
|
|
|
.cra_driver_name = "__driver-xts-serpent-sse2",
|
|
|
|
.cra_priority = 0,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct serpent_xts_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_blkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[4].cra_list),
|
|
|
|
.cra_u = {
|
|
|
|
.blkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE * 2,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE * 2,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = xts_serpent_setkey,
|
|
|
|
.encrypt = xts_encrypt,
|
|
|
|
.decrypt = xts_decrypt,
|
|
|
|
},
|
|
|
|
},
|
|
|
|
}, {
|
2011-11-09 07:26:25 -07:00
|
|
|
.cra_name = "ecb(serpent)",
|
|
|
|
.cra_driver_name = "ecb-serpent-sse2",
|
|
|
|
.cra_priority = 400,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct async_serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
2012-02-17 13:48:37 -07:00
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[5].cra_list),
|
2012-02-17 13:48:53 -07:00
|
|
|
.cra_init = ablk_init,
|
2011-11-09 07:26:25 -07:00
|
|
|
.cra_exit = ablk_exit,
|
|
|
|
.cra_u = {
|
|
|
|
.ablkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE,
|
|
|
|
.setkey = ablk_set_key,
|
|
|
|
.encrypt = ablk_encrypt,
|
|
|
|
.decrypt = ablk_decrypt,
|
|
|
|
},
|
|
|
|
},
|
2012-02-17 13:48:37 -07:00
|
|
|
}, {
|
2011-11-09 07:26:25 -07:00
|
|
|
.cra_name = "cbc(serpent)",
|
|
|
|
.cra_driver_name = "cbc-serpent-sse2",
|
|
|
|
.cra_priority = 400,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct async_serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
2012-02-17 13:48:37 -07:00
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[6].cra_list),
|
2012-02-17 13:48:53 -07:00
|
|
|
.cra_init = ablk_init,
|
2011-11-09 07:26:25 -07:00
|
|
|
.cra_exit = ablk_exit,
|
|
|
|
.cra_u = {
|
|
|
|
.ablkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = ablk_set_key,
|
|
|
|
.encrypt = __ablk_encrypt,
|
|
|
|
.decrypt = ablk_decrypt,
|
|
|
|
},
|
|
|
|
},
|
2012-02-17 13:48:37 -07:00
|
|
|
}, {
|
2011-11-09 07:26:25 -07:00
|
|
|
.cra_name = "ctr(serpent)",
|
|
|
|
.cra_driver_name = "ctr-serpent-sse2",
|
|
|
|
.cra_priority = 400,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
|
.cra_blocksize = 1,
|
|
|
|
.cra_ctxsize = sizeof(struct async_serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
2012-02-17 13:48:37 -07:00
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[7].cra_list),
|
2012-02-17 13:48:53 -07:00
|
|
|
.cra_init = ablk_init,
|
2011-11-09 07:26:25 -07:00
|
|
|
.cra_exit = ablk_exit,
|
|
|
|
.cra_u = {
|
|
|
|
.ablkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = ablk_set_key,
|
|
|
|
.encrypt = ablk_encrypt,
|
|
|
|
.decrypt = ablk_encrypt,
|
|
|
|
.geniv = "chainiv",
|
|
|
|
},
|
|
|
|
},
|
2012-02-17 13:48:37 -07:00
|
|
|
}, {
|
2011-11-09 07:26:36 -07:00
|
|
|
.cra_name = "lrw(serpent)",
|
|
|
|
.cra_driver_name = "lrw-serpent-sse2",
|
|
|
|
.cra_priority = 400,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct async_serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
2012-02-17 13:48:37 -07:00
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[8].cra_list),
|
2012-02-17 13:48:53 -07:00
|
|
|
.cra_init = ablk_init,
|
2011-11-09 07:26:36 -07:00
|
|
|
.cra_exit = ablk_exit,
|
|
|
|
.cra_u = {
|
|
|
|
.ablkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE +
|
|
|
|
SERPENT_BLOCK_SIZE,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE +
|
|
|
|
SERPENT_BLOCK_SIZE,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = ablk_set_key,
|
|
|
|
.encrypt = ablk_encrypt,
|
|
|
|
.decrypt = ablk_decrypt,
|
|
|
|
},
|
|
|
|
},
|
2012-02-17 13:48:37 -07:00
|
|
|
}, {
|
2011-11-09 07:26:41 -07:00
|
|
|
.cra_name = "xts(serpent)",
|
|
|
|
.cra_driver_name = "xts-serpent-sse2",
|
|
|
|
.cra_priority = 400,
|
|
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
|
|
|
.cra_ctxsize = sizeof(struct async_serpent_ctx),
|
|
|
|
.cra_alignmask = 0,
|
|
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
|
|
.cra_module = THIS_MODULE,
|
2012-02-17 13:48:37 -07:00
|
|
|
.cra_list = LIST_HEAD_INIT(serpent_algs[9].cra_list),
|
2012-02-17 13:48:53 -07:00
|
|
|
.cra_init = ablk_init,
|
2011-11-09 07:26:41 -07:00
|
|
|
.cra_exit = ablk_exit,
|
|
|
|
.cra_u = {
|
|
|
|
.ablkcipher = {
|
|
|
|
.min_keysize = SERPENT_MIN_KEY_SIZE * 2,
|
|
|
|
.max_keysize = SERPENT_MAX_KEY_SIZE * 2,
|
|
|
|
.ivsize = SERPENT_BLOCK_SIZE,
|
|
|
|
.setkey = ablk_set_key,
|
|
|
|
.encrypt = ablk_encrypt,
|
|
|
|
.decrypt = ablk_decrypt,
|
|
|
|
},
|
|
|
|
},
|
2012-02-17 13:48:37 -07:00
|
|
|
} };
|
2011-11-09 07:26:41 -07:00
|
|
|
|
2011-11-09 07:26:25 -07:00
|
|
|
static int __init serpent_sse2_init(void)
|
|
|
|
{
|
|
|
|
if (!cpu_has_xmm2) {
|
|
|
|
printk(KERN_INFO "SSE2 instructions are not detected.\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2012-02-17 13:48:37 -07:00
|
|
|
return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
|
2011-11-09 07:26:25 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit serpent_sse2_exit(void)
|
|
|
|
{
|
2012-02-17 13:48:37 -07:00
|
|
|
crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
|
2011-11-09 07:26:25 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(serpent_sse2_init);
|
|
|
|
module_exit(serpent_sse2_exit);
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("Serpent Cipher Algorithm, SSE2 optimized");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS("serpent");
|