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@@ -0,0 +1,1086 @@
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+/*
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+ * Glue Code for AVX assembler version of Twofish 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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+ * Glue code based on serpent_sse2_glue.c by:
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+ * Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.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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+
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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/twofish.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/lrw.h>
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+#include <crypto/xts.h>
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+#include <asm/i387.h>
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+#include <asm/xcr.h>
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+#include <asm/xsave.h>
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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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+
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+
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+#define TWOFISH_PARALLEL_BLOCKS 8
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+
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+/* regular block cipher functions from twofish_x86_64 module */
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+asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src);
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+asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src);
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+
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+/* 3-way parallel cipher functions from twofish_x86_64-3way module */
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+asmlinkage void __twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src, bool xor);
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+asmlinkage void twofish_dec_blk_3way(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src);
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+
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+static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ __twofish_enc_blk_3way(ctx, dst, src, false);
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+}
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+
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+static inline void twofish_enc_blk_3way_xor(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ __twofish_enc_blk_3way(ctx, dst, src, true);
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+}
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+
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+/* 8-way parallel cipher functions */
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+asmlinkage void __twofish_enc_blk_8way(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src, bool xor);
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+asmlinkage void twofish_dec_blk_8way(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src);
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+
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+static inline void twofish_enc_blk_xway(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ __twofish_enc_blk_8way(ctx, dst, src, false);
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+}
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+
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+static inline void twofish_enc_blk_xway_xor(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ __twofish_enc_blk_8way(ctx, dst, src, true);
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+}
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+
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+static inline void twofish_dec_blk_xway(struct twofish_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ twofish_dec_blk_8way(ctx, dst, src);
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+}
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+
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+
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+
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+struct async_twofish_ctx {
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+ struct cryptd_ablkcipher *cryptd_tfm;
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+};
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+
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+static inline bool twofish_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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+
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+ /* AVX 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 < TF_BLOCK_SIZE * TWOFISH_PARALLEL_BLOCKS)
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+ return false;
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+
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+ kernel_fpu_begin();
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+ return true;
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+}
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+
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+static inline void twofish_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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+
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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 twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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+ const unsigned int bsize = TF_BLOCK_SIZE;
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+ unsigned int nbytes;
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+ int err;
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+
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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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+
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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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+
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+ fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
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+
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+ /* Process multi-block batch */
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+ if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
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+ do {
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+ if (enc)
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+ twofish_enc_blk_xway(ctx, wdst, wsrc);
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+ else
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+ twofish_dec_blk_xway(ctx, wdst, wsrc);
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+
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+ wsrc += bsize * TWOFISH_PARALLEL_BLOCKS;
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+ wdst += bsize * TWOFISH_PARALLEL_BLOCKS;
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+ nbytes -= bsize * TWOFISH_PARALLEL_BLOCKS;
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+ } while (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS);
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+
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+ if (nbytes < bsize)
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+ goto done;
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+ }
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+
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+ /* Process three block batch */
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+ if (nbytes >= bsize * 3) {
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+ do {
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+ if (enc)
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+ twofish_enc_blk_3way(ctx, wdst, wsrc);
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+ else
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+ twofish_dec_blk_3way(ctx, wdst, wsrc);
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+
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+ wsrc += bsize * 3;
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+ wdst += bsize * 3;
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+ nbytes -= bsize * 3;
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+ } while (nbytes >= bsize * 3);
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+
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+ if (nbytes < bsize)
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+ goto done;
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+ }
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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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+ twofish_enc_blk(ctx, wdst, wsrc);
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+ else
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+ twofish_dec_blk(ctx, wdst, wsrc);
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+
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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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+
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+done:
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+ err = blkcipher_walk_done(desc, walk, nbytes);
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+ }
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+
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+ twofish_fpu_end(fpu_enabled);
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+ return err;
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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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+ struct blkcipher_walk walk;
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+
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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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+
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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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+
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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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+
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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 twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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+ const unsigned int bsize = TF_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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+
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+ do {
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+ u128_xor(dst, src, iv);
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+ twofish_enc_blk(ctx, (u8 *)dst, (u8 *)dst);
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+ iv = dst;
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return err;
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+}
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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 twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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+ const unsigned int bsize = TF_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[TWOFISH_PARALLEL_BLOCKS - 1];
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+ u128 last_iv;
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+ int i;
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+
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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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+
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+ last_iv = *src;
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+
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+ /* Process multi-block batch */
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+ if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
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+ do {
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+ nbytes -= bsize * (TWOFISH_PARALLEL_BLOCKS - 1);
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+ src -= TWOFISH_PARALLEL_BLOCKS - 1;
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+ dst -= TWOFISH_PARALLEL_BLOCKS - 1;
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+
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+ for (i = 0; i < TWOFISH_PARALLEL_BLOCKS - 1; i++)
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+ ivs[i] = src[i];
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+
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+ twofish_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
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+
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+ for (i = 0; i < TWOFISH_PARALLEL_BLOCKS - 1; i++)
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+ u128_xor(dst + (i + 1), dst + (i + 1), ivs + i);
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+
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+ nbytes -= bsize;
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+ if (nbytes < bsize)
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+ goto done;
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+
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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 * TWOFISH_PARALLEL_BLOCKS);
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+
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+ if (nbytes < bsize)
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+ goto done;
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+ }
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+
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+ /* Process three block batch */
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+ if (nbytes >= bsize * 3) {
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+ do {
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+ nbytes -= bsize * (3 - 1);
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+ src -= 3 - 1;
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+ dst -= 3 - 1;
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+
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+ ivs[0] = src[0];
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+ ivs[1] = src[1];
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+
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+ twofish_dec_blk_3way(ctx, (u8 *)dst, (u8 *)src);
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+
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+ u128_xor(dst + 1, dst + 1, ivs + 0);
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+ u128_xor(dst + 2, dst + 2, ivs + 1);
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+
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+ nbytes -= bsize;
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+ if (nbytes < bsize)
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+ goto done;
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+
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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 * 3);
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+
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+ if (nbytes < bsize)
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+ goto done;
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+ }
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+
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+ /* Handle leftovers */
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+ for (;;) {
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+ twofish_dec_blk(ctx, (u8 *)dst, (u8 *)src);
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+
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+ nbytes -= bsize;
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+ if (nbytes < bsize)
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+ break;
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+
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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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+
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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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+
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+ return nbytes;
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+}
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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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+
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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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+
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+ while ((nbytes = walk.nbytes)) {
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+ fpu_enabled = twofish_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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+
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+ twofish_fpu_end(fpu_enabled);
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+ return err;
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+}
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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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+
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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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+
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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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+
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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 twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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+ u8 *ctrblk = walk->iv;
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+ u8 keystream[TF_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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+
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+ twofish_enc_blk(ctx, keystream, ctrblk);
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+ crypto_xor(keystream, src, nbytes);
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+ memcpy(dst, keystream, nbytes);
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+
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+ crypto_inc(ctrblk, TF_BLOCK_SIZE);
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+}
|
|
|
+
|
|
|
+static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
|
|
|
+ struct blkcipher_walk *walk)
|
|
|
+{
|
|
|
+ struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
+ const 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[TWOFISH_PARALLEL_BLOCKS];
|
|
|
+ int i;
|
|
|
+
|
|
|
+ be128_to_u128(&ctrblk, (be128 *)walk->iv);
|
|
|
+
|
|
|
+ /* Process multi-block batch */
|
|
|
+ if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
|
|
|
+ do {
|
|
|
+ /* create ctrblks for parallel encrypt */
|
|
|
+ for (i = 0; i < TWOFISH_PARALLEL_BLOCKS; i++) {
|
|
|
+ if (dst != src)
|
|
|
+ dst[i] = src[i];
|
|
|
+
|
|
|
+ u128_to_be128(&ctrblocks[i], &ctrblk);
|
|
|
+ u128_inc(&ctrblk);
|
|
|
+ }
|
|
|
+
|
|
|
+ twofish_enc_blk_xway_xor(ctx, (u8 *)dst,
|
|
|
+ (u8 *)ctrblocks);
|
|
|
+
|
|
|
+ src += TWOFISH_PARALLEL_BLOCKS;
|
|
|
+ dst += TWOFISH_PARALLEL_BLOCKS;
|
|
|
+ nbytes -= bsize * TWOFISH_PARALLEL_BLOCKS;
|
|
|
+ } while (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS);
|
|
|
+
|
|
|
+ if (nbytes < bsize)
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* 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_3way_xor(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;
|
|
|
+}
|
|
|
+
|
|
|
+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, TF_BLOCK_SIZE);
|
|
|
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
+
|
|
|
+ while ((nbytes = walk.nbytes) >= TF_BLOCK_SIZE) {
|
|
|
+ fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
|
|
|
+ nbytes = __ctr_crypt(desc, &walk);
|
|
|
+ err = blkcipher_walk_done(desc, &walk, nbytes);
|
|
|
+ }
|
|
|
+
|
|
|
+ twofish_fpu_end(fpu_enabled);
|
|
|
+
|
|
|
+ if (walk.nbytes) {
|
|
|
+ ctr_crypt_final(desc, &walk);
|
|
|
+ err = blkcipher_walk_done(desc, &walk, 0);
|
|
|
+ }
|
|
|
+
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+struct crypt_priv {
|
|
|
+ struct twofish_ctx *ctx;
|
|
|
+ bool fpu_enabled;
|
|
|
+};
|
|
|
+
|
|
|
+static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
|
|
|
+{
|
|
|
+ const unsigned int bsize = TF_BLOCK_SIZE;
|
|
|
+ struct crypt_priv *ctx = priv;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes);
|
|
|
+
|
|
|
+ if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) {
|
|
|
+ twofish_enc_blk_xway(ctx->ctx, srcdst, srcdst);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3)
|
|
|
+ twofish_enc_blk_3way(ctx->ctx, srcdst, srcdst);
|
|
|
+
|
|
|
+ nbytes %= bsize * 3;
|
|
|
+
|
|
|
+ for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
|
|
|
+ twofish_enc_blk(ctx->ctx, srcdst, srcdst);
|
|
|
+}
|
|
|
+
|
|
|
+static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
|
|
|
+{
|
|
|
+ const unsigned int bsize = TF_BLOCK_SIZE;
|
|
|
+ struct crypt_priv *ctx = priv;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ ctx->fpu_enabled = twofish_fpu_begin(ctx->fpu_enabled, nbytes);
|
|
|
+
|
|
|
+ if (nbytes == bsize * TWOFISH_PARALLEL_BLOCKS) {
|
|
|
+ twofish_dec_blk_xway(ctx->ctx, srcdst, srcdst);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ for (i = 0; i < nbytes / (bsize * 3); i++, srcdst += bsize * 3)
|
|
|
+ twofish_dec_blk_3way(ctx->ctx, srcdst, srcdst);
|
|
|
+
|
|
|
+ nbytes %= bsize * 3;
|
|
|
+
|
|
|
+ for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
|
|
|
+ twofish_dec_blk(ctx->ctx, srcdst, srcdst);
|
|
|
+}
|
|
|
+
|
|
|
+struct twofish_lrw_ctx {
|
|
|
+ struct lrw_table_ctx lrw_table;
|
|
|
+ struct twofish_ctx twofish_ctx;
|
|
|
+};
|
|
|
+
|
|
|
+static int lrw_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
|
|
|
+ unsigned int keylen)
|
|
|
+{
|
|
|
+ struct twofish_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
+ int err;
|
|
|
+
|
|
|
+ err = __twofish_setkey(&ctx->twofish_ctx, key,
|
|
|
+ keylen - TF_BLOCK_SIZE, &tfm->crt_flags);
|
|
|
+ if (err)
|
|
|
+ return err;
|
|
|
+
|
|
|
+ return lrw_init_table(&ctx->lrw_table, key + keylen -
|
|
|
+ TF_BLOCK_SIZE);
|
|
|
+}
|
|
|
+
|
|
|
+static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
+ struct scatterlist *src, unsigned int nbytes)
|
|
|
+{
|
|
|
+ struct twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
+ be128 buf[TWOFISH_PARALLEL_BLOCKS];
|
|
|
+ struct crypt_priv crypt_ctx = {
|
|
|
+ .ctx = &ctx->twofish_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;
|
|
|
+
|
|
|
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
|
|
|
+ twofish_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 twofish_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
+ be128 buf[TWOFISH_PARALLEL_BLOCKS];
|
|
|
+ struct crypt_priv crypt_ctx = {
|
|
|
+ .ctx = &ctx->twofish_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;
|
|
|
+
|
|
|
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
|
|
|
+ twofish_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static void lrw_exit_tfm(struct crypto_tfm *tfm)
|
|
|
+{
|
|
|
+ struct twofish_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
+
|
|
|
+ lrw_free_table(&ctx->lrw_table);
|
|
|
+}
|
|
|
+
|
|
|
+struct twofish_xts_ctx {
|
|
|
+ struct twofish_ctx tweak_ctx;
|
|
|
+ struct twofish_ctx crypt_ctx;
|
|
|
+};
|
|
|
+
|
|
|
+static int xts_twofish_setkey(struct crypto_tfm *tfm, const u8 *key,
|
|
|
+ unsigned int keylen)
|
|
|
+{
|
|
|
+ struct twofish_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 = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
|
|
|
+ if (err)
|
|
|
+ return err;
|
|
|
+
|
|
|
+ /* second half of xts-key is for tweak */
|
|
|
+ return __twofish_setkey(&ctx->tweak_ctx,
|
|
|
+ key + keylen / 2, keylen / 2, flags);
|
|
|
+}
|
|
|
+
|
|
|
+static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
|
|
|
+ struct scatterlist *src, unsigned int nbytes)
|
|
|
+{
|
|
|
+ struct twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
+ be128 buf[TWOFISH_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(twofish_enc_blk),
|
|
|
+ .crypt_ctx = &crypt_ctx,
|
|
|
+ .crypt_fn = encrypt_callback,
|
|
|
+ };
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
+ ret = xts_crypt(desc, dst, src, nbytes, &req);
|
|
|
+ twofish_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 twofish_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
|
|
|
+ be128 buf[TWOFISH_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(twofish_enc_blk),
|
|
|
+ .crypt_ctx = &crypt_ctx,
|
|
|
+ .crypt_fn = decrypt_callback,
|
|
|
+ };
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
|
|
|
+ ret = xts_crypt(desc, dst, src, nbytes, &req);
|
|
|
+ twofish_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
|
|
|
+ unsigned int key_len)
|
|
|
+{
|
|
|
+ struct async_twofish_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_twofish_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_twofish_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_twofish_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_twofish_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
+
|
|
|
+ cryptd_free_ablkcipher(ctx->cryptd_tfm);
|
|
|
+}
|
|
|
+
|
|
|
+static int ablk_init(struct crypto_tfm *tfm)
|
|
|
+{
|
|
|
+ struct async_twofish_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
+ struct cryptd_ablkcipher *cryptd_tfm;
|
|
|
+ char drv_name[CRYPTO_MAX_ALG_NAME];
|
|
|
+
|
|
|
+ snprintf(drv_name, sizeof(drv_name), "__driver-%s",
|
|
|
+ crypto_tfm_alg_driver_name(tfm));
|
|
|
+
|
|
|
+ cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, 0, 0);
|
|
|
+ if (IS_ERR(cryptd_tfm))
|
|
|
+ return PTR_ERR(cryptd_tfm);
|
|
|
+
|
|
|
+ ctx->cryptd_tfm = cryptd_tfm;
|
|
|
+ tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) +
|
|
|
+ crypto_ablkcipher_reqsize(&cryptd_tfm->base);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct crypto_alg twofish_algs[10] = { {
|
|
|
+ .cra_name = "__ecb-twofish-avx",
|
|
|
+ .cra_driver_name = "__driver-ecb-twofish-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[0].cra_list),
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE,
|
|
|
+ .setkey = twofish_setkey,
|
|
|
+ .encrypt = ecb_encrypt,
|
|
|
+ .decrypt = ecb_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__cbc-twofish-avx",
|
|
|
+ .cra_driver_name = "__driver-cbc-twofish-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[1].cra_list),
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE,
|
|
|
+ .setkey = twofish_setkey,
|
|
|
+ .encrypt = cbc_encrypt,
|
|
|
+ .decrypt = cbc_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__ctr-twofish-avx",
|
|
|
+ .cra_driver_name = "__driver-ctr-twofish-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = 1,
|
|
|
+ .cra_ctxsize = sizeof(struct twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[2].cra_list),
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = twofish_setkey,
|
|
|
+ .encrypt = ctr_crypt,
|
|
|
+ .decrypt = ctr_crypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__lrw-twofish-avx",
|
|
|
+ .cra_driver_name = "__driver-lrw-twofish-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct twofish_lrw_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[3].cra_list),
|
|
|
+ .cra_exit = lrw_exit_tfm,
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE +
|
|
|
+ TF_BLOCK_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE +
|
|
|
+ TF_BLOCK_SIZE,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = lrw_twofish_setkey,
|
|
|
+ .encrypt = lrw_encrypt,
|
|
|
+ .decrypt = lrw_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__xts-twofish-avx",
|
|
|
+ .cra_driver_name = "__driver-xts-twofish-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct twofish_xts_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[4].cra_list),
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE * 2,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE * 2,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = xts_twofish_setkey,
|
|
|
+ .encrypt = xts_encrypt,
|
|
|
+ .decrypt = xts_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "ecb(twofish)",
|
|
|
+ .cra_driver_name = "ecb-twofish-avx",
|
|
|
+ .cra_priority = 400,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[5].cra_list),
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "cbc(twofish)",
|
|
|
+ .cra_driver_name = "cbc-twofish-avx",
|
|
|
+ .cra_priority = 400,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[6].cra_list),
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = __ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "ctr(twofish)",
|
|
|
+ .cra_driver_name = "ctr-twofish-avx",
|
|
|
+ .cra_priority = 400,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = 1,
|
|
|
+ .cra_ctxsize = sizeof(struct async_twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[7].cra_list),
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_encrypt,
|
|
|
+ .geniv = "chainiv",
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "lrw(twofish)",
|
|
|
+ .cra_driver_name = "lrw-twofish-avx",
|
|
|
+ .cra_priority = 400,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[8].cra_list),
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE +
|
|
|
+ TF_BLOCK_SIZE,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE +
|
|
|
+ TF_BLOCK_SIZE,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "xts(twofish)",
|
|
|
+ .cra_driver_name = "xts-twofish-avx",
|
|
|
+ .cra_priority = 400,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = TF_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_twofish_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_list = LIST_HEAD_INIT(twofish_algs[9].cra_list),
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = TF_MIN_KEY_SIZE * 2,
|
|
|
+ .max_keysize = TF_MAX_KEY_SIZE * 2,
|
|
|
+ .ivsize = TF_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+} };
|
|
|
+
|
|
|
+static int __init twofish_init(void)
|
|
|
+{
|
|
|
+ u64 xcr0;
|
|
|
+
|
|
|
+ if (!cpu_has_avx || !cpu_has_osxsave) {
|
|
|
+ printk(KERN_INFO "AVX instructions are not detected.\n");
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
|
|
|
+ if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) {
|
|
|
+ printk(KERN_INFO "AVX detected but unusable.\n");
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ return crypto_register_algs(twofish_algs, ARRAY_SIZE(twofish_algs));
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit twofish_exit(void)
|
|
|
+{
|
|
|
+ crypto_unregister_algs(twofish_algs, ARRAY_SIZE(twofish_algs));
|
|
|
+}
|
|
|
+
|
|
|
+module_init(twofish_init);
|
|
|
+module_exit(twofish_exit);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("Twofish Cipher Algorithm, AVX optimized");
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+MODULE_ALIAS("twofish");
|
Johannes Goetzfried