432 строки
12 KiB
C
432 строки
12 KiB
C
/*
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* Glue Code for the AVX assembler implemention of the Cast6 Cipher
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*
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* Copyright (C) 2012 Johannes Goetzfried
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* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
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*
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* Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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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/ablk_helper.h>
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#include <crypto/algapi.h>
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#include <crypto/cast6.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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#include <crypto/xts.h>
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#include <asm/crypto/glue_helper.h>
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#define CAST6_PARALLEL_BLOCKS 8
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asmlinkage void cast6_ecb_enc_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast6_ecb_dec_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast6_cbc_dec_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src);
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asmlinkage void cast6_ctr_8way(struct cast6_ctx *ctx, u8 *dst, const u8 *src,
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le128 *iv);
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asmlinkage void cast6_xts_enc_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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asmlinkage void cast6_xts_dec_8way(struct cast6_ctx *ctx, u8 *dst,
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const u8 *src, le128 *iv);
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static void cast6_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv,
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GLUE_FUNC_CAST(__cast6_encrypt));
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}
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static void cast6_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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glue_xts_crypt_128bit_one(ctx, dst, src, iv,
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GLUE_FUNC_CAST(__cast6_decrypt));
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}
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static void cast6_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
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{
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be128 ctrblk;
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le128_to_be128(&ctrblk, iv);
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le128_inc(iv);
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__cast6_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
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u128_xor(dst, src, (u128 *)&ctrblk);
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}
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static const struct common_glue_ctx cast6_enc = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_enc_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_encrypt) }
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} }
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};
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static const struct common_glue_ctx cast6_ctr = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_ctr_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_crypt_ctr) }
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} }
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};
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static const struct common_glue_ctx cast6_enc_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc) }
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} }
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};
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static const struct common_glue_ctx cast6_dec = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_dec_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_decrypt) }
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} }
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};
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static const struct common_glue_ctx cast6_dec_cbc = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(cast6_cbc_dec_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__cast6_decrypt) }
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} }
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};
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static const struct common_glue_ctx cast6_dec_xts = {
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.num_funcs = 2,
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.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
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.funcs = { {
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.num_blocks = CAST6_PARALLEL_BLOCKS,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec_8way) }
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}, {
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.num_blocks = 1,
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.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec) }
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} }
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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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return glue_ecb_crypt_128bit(&cast6_enc, desc, dst, src, nbytes);
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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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return glue_ecb_crypt_128bit(&cast6_dec, desc, dst, src, 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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return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__cast6_encrypt), desc,
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dst, src, 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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return glue_cbc_decrypt_128bit(&cast6_dec_cbc, desc, dst, src,
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nbytes);
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}
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static int ctr_crypt(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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return glue_ctr_crypt_128bit(&cast6_ctr, desc, dst, src, nbytes);
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}
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struct cast6_xts_ctx {
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struct cast6_ctx tweak_ctx;
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struct cast6_ctx crypt_ctx;
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};
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static int xts_cast6_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct cast6_xts_ctx *ctx = crypto_tfm_ctx(tfm);
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u32 *flags = &tfm->crt_flags;
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int err;
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err = xts_check_key(tfm, key, keylen);
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if (err)
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return err;
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/* first half of xts-key is for crypt */
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err = __cast6_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
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if (err)
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return err;
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/* second half of xts-key is for tweak */
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return __cast6_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
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flags);
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}
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static int xts_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 cast6_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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return glue_xts_crypt_128bit(&cast6_enc_xts, desc, dst, src, nbytes,
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XTS_TWEAK_CAST(__cast6_encrypt),
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&ctx->tweak_ctx, &ctx->crypt_ctx);
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}
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static int xts_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 cast6_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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return glue_xts_crypt_128bit(&cast6_dec_xts, desc, dst, src, nbytes,
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XTS_TWEAK_CAST(__cast6_encrypt),
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&ctx->tweak_ctx, &ctx->crypt_ctx);
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}
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static struct crypto_alg cast6_algs[] = { {
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.cra_name = "__ecb-cast6-avx",
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.cra_driver_name = "__driver-ecb-cast6-avx",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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.cra_blocksize = CAST6_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct cast6_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE,
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.max_keysize = CAST6_MAX_KEY_SIZE,
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.setkey = cast6_setkey,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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},
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},
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}, {
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.cra_name = "__cbc-cast6-avx",
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.cra_driver_name = "__driver-cbc-cast6-avx",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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.cra_blocksize = CAST6_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct cast6_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE,
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.max_keysize = CAST6_MAX_KEY_SIZE,
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.setkey = cast6_setkey,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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},
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},
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}, {
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.cra_name = "__ctr-cast6-avx",
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.cra_driver_name = "__driver-ctr-cast6-avx",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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.cra_blocksize = 1,
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.cra_ctxsize = sizeof(struct cast6_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE,
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.max_keysize = CAST6_MAX_KEY_SIZE,
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.ivsize = CAST6_BLOCK_SIZE,
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.setkey = cast6_setkey,
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.encrypt = ctr_crypt,
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.decrypt = ctr_crypt,
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},
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},
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}, {
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.cra_name = "__xts-cast6-avx",
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.cra_driver_name = "__driver-xts-cast6-avx",
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.cra_priority = 0,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
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CRYPTO_ALG_INTERNAL,
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.cra_blocksize = CAST6_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct cast6_xts_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE * 2,
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.max_keysize = CAST6_MAX_KEY_SIZE * 2,
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.ivsize = CAST6_BLOCK_SIZE,
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.setkey = xts_cast6_setkey,
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.encrypt = xts_encrypt,
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.decrypt = xts_decrypt,
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},
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},
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}, {
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.cra_name = "ecb(cast6)",
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.cra_driver_name = "ecb-cast6-avx",
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.cra_priority = 200,
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
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.cra_blocksize = CAST6_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct async_helper_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_ablkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = ablk_init,
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.cra_exit = ablk_exit,
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.cra_u = {
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.ablkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE,
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.max_keysize = CAST6_MAX_KEY_SIZE,
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.setkey = ablk_set_key,
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.encrypt = ablk_encrypt,
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.decrypt = ablk_decrypt,
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},
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},
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}, {
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.cra_name = "cbc(cast6)",
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.cra_driver_name = "cbc-cast6-avx",
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.cra_priority = 200,
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
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.cra_blocksize = CAST6_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct async_helper_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_ablkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = ablk_init,
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.cra_exit = ablk_exit,
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.cra_u = {
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.ablkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE,
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.max_keysize = CAST6_MAX_KEY_SIZE,
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.ivsize = CAST6_BLOCK_SIZE,
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.setkey = ablk_set_key,
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.encrypt = __ablk_encrypt,
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.decrypt = ablk_decrypt,
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},
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},
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}, {
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.cra_name = "ctr(cast6)",
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.cra_driver_name = "ctr-cast6-avx",
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.cra_priority = 200,
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
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.cra_blocksize = 1,
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.cra_ctxsize = sizeof(struct async_helper_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_ablkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = ablk_init,
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.cra_exit = ablk_exit,
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.cra_u = {
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.ablkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE,
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.max_keysize = CAST6_MAX_KEY_SIZE,
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.ivsize = CAST6_BLOCK_SIZE,
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.setkey = ablk_set_key,
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.encrypt = ablk_encrypt,
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.decrypt = ablk_encrypt,
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.geniv = "chainiv",
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},
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},
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}, {
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.cra_name = "xts(cast6)",
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.cra_driver_name = "xts-cast6-avx",
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.cra_priority = 200,
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
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.cra_blocksize = CAST6_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct async_helper_ctx),
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.cra_alignmask = 0,
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.cra_type = &crypto_ablkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_init = ablk_init,
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.cra_exit = ablk_exit,
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.cra_u = {
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.ablkcipher = {
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.min_keysize = CAST6_MIN_KEY_SIZE * 2,
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.max_keysize = CAST6_MAX_KEY_SIZE * 2,
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.ivsize = CAST6_BLOCK_SIZE,
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.setkey = ablk_set_key,
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.encrypt = ablk_encrypt,
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.decrypt = ablk_decrypt,
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},
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},
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} };
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static int __init cast6_init(void)
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{
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const char *feature_name;
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if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
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&feature_name)) {
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pr_info("CPU feature '%s' is not supported.\n", feature_name);
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return -ENODEV;
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}
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return crypto_register_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
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}
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static void __exit cast6_exit(void)
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{
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crypto_unregister_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
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}
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module_init(cast6_init);
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module_exit(cast6_exit);
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MODULE_DESCRIPTION("Cast6 Cipher Algorithm, AVX optimized");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_CRYPTO("cast6");
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