--- /dev/null
+/*
+ * Twofish Cipher 8-way parallel algorithm (AVX/x86_64)
+ *
+ * Copyright (C) 2012 Johannes Goetzfried
+ * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ */
+
+.file "twofish-avx-x86_64-asm_64.S"
+.text
+
+/* structure of crypto context */
+#define s0 0
+#define s1 1024
+#define s2 2048
+#define s3 3072
+#define w 4096
+#define k 4128
+
+/**********************************************************************
+ 8-way AVX twofish
+ **********************************************************************/
+#define CTX %rdi
+
+#define RA1 %xmm0
+#define RB1 %xmm1
+#define RC1 %xmm2
+#define RD1 %xmm3
+
+#define RA2 %xmm4
+#define RB2 %xmm5
+#define RC2 %xmm6
+#define RD2 %xmm7
+
+#define RX %xmm8
+#define RY %xmm9
+
+#define RK1 %xmm10
+#define RK2 %xmm11
+
+#define RID1 %rax
+#define RID1b %al
+#define RID2 %rbx
+#define RID2b %bl
+
+#define RGI1 %rdx
+#define RGI1bl %dl
+#define RGI1bh %dh
+#define RGI2 %rcx
+#define RGI2bl %cl
+#define RGI2bh %ch
+
+#define RGS1 %r8
+#define RGS1d %r8d
+#define RGS2 %r9
+#define RGS2d %r9d
+#define RGS3 %r10
+#define RGS3d %r10d
+
+
+#define lookup_32bit(t0, t1, t2, t3, src, dst) \
+ movb src ## bl, RID1b; \
+ movb src ## bh, RID2b; \
+ movl t0(CTX, RID1, 4), dst ## d; \
+ xorl t1(CTX, RID2, 4), dst ## d; \
+ shrq $16, src; \
+ movb src ## bl, RID1b; \
+ movb src ## bh, RID2b; \
+ xorl t2(CTX, RID1, 4), dst ## d; \
+ xorl t3(CTX, RID2, 4), dst ## d;
+
+#define G(a, x, t0, t1, t2, t3) \
+ vmovq a, RGI1; \
+ vpsrldq $8, a, x; \
+ vmovq x, RGI2; \
+ \
+ lookup_32bit(t0, t1, t2, t3, RGI1, RGS1); \
+ shrq $16, RGI1; \
+ lookup_32bit(t0, t1, t2, t3, RGI1, RGS2); \
+ shlq $32, RGS2; \
+ orq RGS1, RGS2; \
+ \
+ lookup_32bit(t0, t1, t2, t3, RGI2, RGS1); \
+ shrq $16, RGI2; \
+ lookup_32bit(t0, t1, t2, t3, RGI2, RGS3); \
+ shlq $32, RGS3; \
+ orq RGS1, RGS3; \
+ \
+ vmovq RGS2, x; \
+ vpinsrq $1, RGS3, x, x;
+
+#define encround(a, b, c, d, x, y) \
+ G(a, x, s0, s1, s2, s3); \
+ G(b, y, s1, s2, s3, s0); \
+ vpaddd x, y, x; \
+ vpaddd y, x, y; \
+ vpaddd x, RK1, x; \
+ vpaddd y, RK2, y; \
+ vpxor x, c, c; \
+ vpsrld $1, c, x; \
+ vpslld $(32 - 1), c, c; \
+ vpor c, x, c; \
+ vpslld $1, d, x; \
+ vpsrld $(32 - 1), d, d; \
+ vpor d, x, d; \
+ vpxor d, y, d;
+
+#define decround(a, b, c, d, x, y) \
+ G(a, x, s0, s1, s2, s3); \
+ G(b, y, s1, s2, s3, s0); \
+ vpaddd x, y, x; \
+ vpaddd y, x, y; \
+ vpaddd y, RK2, y; \
+ vpxor d, y, d; \
+ vpsrld $1, d, y; \
+ vpslld $(32 - 1), d, d; \
+ vpor d, y, d; \
+ vpslld $1, c, y; \
+ vpsrld $(32 - 1), c, c; \
+ vpor c, y, c; \
+ vpaddd x, RK1, x; \
+ vpxor x, c, c;
+
+#define encrypt_round(n, a, b, c, d) \
+ vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
+ vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
+ encround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \
+ encround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY);
+
+#define decrypt_round(n, a, b, c, d) \
+ vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
+ vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
+ decround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \
+ decround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY);
+
+#define encrypt_cycle(n) \
+ encrypt_round((2*n), RA, RB, RC, RD); \
+ encrypt_round(((2*n) + 1), RC, RD, RA, RB);
+
+#define decrypt_cycle(n) \
+ decrypt_round(((2*n) + 1), RC, RD, RA, RB); \
+ decrypt_round((2*n), RA, RB, RC, RD);
+
+
+#define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
+ vpunpckldq x1, x0, t0; \
+ vpunpckhdq x1, x0, t2; \
+ vpunpckldq x3, x2, t1; \
+ vpunpckhdq x3, x2, x3; \
+ \
+ vpunpcklqdq t1, t0, x0; \
+ vpunpckhqdq t1, t0, x1; \
+ vpunpcklqdq x3, t2, x2; \
+ vpunpckhqdq x3, t2, x3;
+
+#define inpack_blocks(in, x0, x1, x2, x3, wkey, t0, t1, t2) \
+ vpxor (0*4*4)(in), wkey, x0; \
+ vpxor (1*4*4)(in), wkey, x1; \
+ vpxor (2*4*4)(in), wkey, x2; \
+ vpxor (3*4*4)(in), wkey, x3; \
+ \
+ transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
+
+#define outunpack_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \
+ transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
+ \
+ vpxor x0, wkey, x0; \
+ vmovdqu x0, (0*4*4)(out); \
+ vpxor x1, wkey, x1; \
+ vmovdqu x1, (1*4*4)(out); \
+ vpxor x2, wkey, x2; \
+ vmovdqu x2, (2*4*4)(out); \
+ vpxor x3, wkey, x3; \
+ vmovdqu x3, (3*4*4)(out);
+
+#define outunpack_xor_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \
+ transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
+ \
+ vpxor x0, wkey, x0; \
+ vpxor (0*4*4)(out), x0, x0; \
+ vmovdqu x0, (0*4*4)(out); \
+ vpxor x1, wkey, x1; \
+ vpxor (1*4*4)(out), x1, x1; \
+ vmovdqu x1, (1*4*4)(out); \
+ vpxor x2, wkey, x2; \
+ vpxor (2*4*4)(out), x2, x2; \
+ vmovdqu x2, (2*4*4)(out); \
+ vpxor x3, wkey, x3; \
+ vpxor (3*4*4)(out), x3, x3; \
+ vmovdqu x3, (3*4*4)(out);
+
+.align 8
+.global __twofish_enc_blk_8way
+.type __twofish_enc_blk_8way,@function;
+
+__twofish_enc_blk_8way:
+ /* input:
+ * %rdi: ctx, CTX
+ * %rsi: dst
+ * %rdx: src
+ * %rcx: bool, if true: xor output
+ */
+
+ pushq %rbx;
+ pushq %rcx;
+
+ vmovdqu w(CTX), RK1;
+
+ leaq (4*4*4)(%rdx), %rax;
+ inpack_blocks(%rdx, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2);
+ inpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2);
+
+ xorq RID1, RID1;
+ xorq RID2, RID2;
+
+ encrypt_cycle(0);
+ encrypt_cycle(1);
+ encrypt_cycle(2);
+ encrypt_cycle(3);
+ encrypt_cycle(4);
+ encrypt_cycle(5);
+ encrypt_cycle(6);
+ encrypt_cycle(7);
+
+ vmovdqu (w+4*4)(CTX), RK1;
+
+ popq %rcx;
+ popq %rbx;
+
+ leaq (4*4*4)(%rsi), %rax;
+ leaq (4*4*4)(%rax), %rdx;
+
+ testb %cl, %cl;
+ jnz __enc_xor8;
+
+ outunpack_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
+ outunpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
+
+ ret;
+
+__enc_xor8:
+ outunpack_xor_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
+ outunpack_xor_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
+
+ ret;
+
+.align 8
+.global twofish_dec_blk_8way
+.type twofish_dec_blk_8way,@function;
+
+twofish_dec_blk_8way:
+ /* input:
+ * %rdi: ctx, CTX
+ * %rsi: dst
+ * %rdx: src
+ */
+
+ pushq %rbx;
+
+ vmovdqu (w+4*4)(CTX), RK1;
+
+ leaq (4*4*4)(%rdx), %rax;
+ inpack_blocks(%rdx, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2);
+ inpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2);
+
+ xorq RID1, RID1;
+ xorq RID2, RID2;
+
+ decrypt_cycle(7);
+ decrypt_cycle(6);
+ decrypt_cycle(5);
+ decrypt_cycle(4);
+ decrypt_cycle(3);
+ decrypt_cycle(2);
+ decrypt_cycle(1);
+ decrypt_cycle(0);
+
+ vmovdqu (w)(CTX), RK1;
+
+ popq %rbx;
+
+ leaq (4*4*4)(%rsi), %rax;
+ outunpack_blocks(%rsi, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2);
+ outunpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2);
+
+ ret;
--- /dev/null
+/*
+ * Glue Code for AVX assembler version of Twofish Cipher
+ *
+ * Copyright (C) 2012 Johannes Goetzfried
+ * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
+ *
+ * Glue code based on serpent_sse2_glue.c by:
+ * Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/hardirq.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/twofish.h>
+#include <crypto/cryptd.h>
+#include <crypto/b128ops.h>
+#include <crypto/ctr.h>
+#include <crypto/lrw.h>
+#include <crypto/xts.h>
+#include <asm/i387.h>
+#include <asm/xcr.h>
+#include <asm/xsave.h>
+#include <crypto/scatterwalk.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+
+
+#define TWOFISH_PARALLEL_BLOCKS 8
+
+/* regular block cipher functions from twofish_x86_64 module */
+asmlinkage void twofish_enc_blk(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src);
+asmlinkage void twofish_dec_blk(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src);
+
+/* 3-way parallel cipher functions from twofish_x86_64-3way module */
+asmlinkage void __twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src, bool xor);
+asmlinkage void twofish_dec_blk_3way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src);
+
+static inline void twofish_enc_blk_3way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_3way(ctx, dst, src, false);
+}
+
+static inline void twofish_enc_blk_3way_xor(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_3way(ctx, dst, src, true);
+}
+
+/* 8-way parallel cipher functions */
+asmlinkage void __twofish_enc_blk_8way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src, bool xor);
+asmlinkage void twofish_dec_blk_8way(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src);
+
+static inline void twofish_enc_blk_xway(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_8way(ctx, dst, src, false);
+}
+
+static inline void twofish_enc_blk_xway_xor(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ __twofish_enc_blk_8way(ctx, dst, src, true);
+}
+
+static inline void twofish_dec_blk_xway(struct twofish_ctx *ctx, u8 *dst,
+ const u8 *src)
+{
+ twofish_dec_blk_8way(ctx, dst, src);
+}
+
+
+
+struct async_twofish_ctx {
+ struct cryptd_ablkcipher *cryptd_tfm;
+};
+
+static inline bool twofish_fpu_begin(bool fpu_enabled, unsigned int nbytes)
+{
+ if (fpu_enabled)
+ return true;
+
+ /* AVX is only used when chunk to be processed is large enough, so
+ * do not enable FPU until it is necessary.
+ */
+ if (nbytes < TF_BLOCK_SIZE * TWOFISH_PARALLEL_BLOCKS)
+ return false;
+
+ kernel_fpu_begin();
+ return true;
+}
+
+static inline void twofish_fpu_end(bool fpu_enabled)
+{
+ if (fpu_enabled)
+ kernel_fpu_end();
+}
+
+static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
+ bool enc)
+{
+ bool fpu_enabled = false;
+ struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ const unsigned int bsize = TF_BLOCK_SIZE;
+ unsigned int nbytes;
+ int err;
+
+ err = blkcipher_walk_virt(desc, walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ while ((nbytes = walk->nbytes)) {
+ u8 *wsrc = walk->src.virt.addr;
+ u8 *wdst = walk->dst.virt.addr;
+
+ fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
+
+ /* Process multi-block batch */
+ if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
+ do {
+ if (enc)
+ twofish_enc_blk_xway(ctx, wdst, wsrc);
+ else
+ twofish_dec_blk_xway(ctx, wdst, wsrc);
+
+ wsrc += bsize * TWOFISH_PARALLEL_BLOCKS;
+ wdst += bsize * 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 (enc)
+ twofish_enc_blk_3way(ctx, wdst, wsrc);
+ else
+ twofish_dec_blk_3way(ctx, wdst, wsrc);
+
+ wsrc += bsize * 3;
+ wdst += bsize * 3;
+ nbytes -= bsize * 3;
+ } while (nbytes >= bsize * 3);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Handle leftovers */
+ do {
+ if (enc)
+ twofish_enc_blk(ctx, wdst, wsrc);
+ else
+ twofish_dec_blk(ctx, wdst, wsrc);
+
+ wsrc += bsize;
+ wdst += bsize;
+ nbytes -= bsize;
+ } while (nbytes >= bsize);
+
+done:
+ err = blkcipher_walk_done(desc, walk, nbytes);
+ }
+
+ twofish_fpu_end(fpu_enabled);
+ return err;
+}
+
+static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ecb_crypt(desc, &walk, true);
+}
+
+static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ecb_crypt(desc, &walk, false);
+}
+
+static unsigned int __cbc_encrypt(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 *iv = (u128 *)walk->iv;
+
+ do {
+ u128_xor(dst, src, iv);
+ twofish_enc_blk(ctx, (u8 *)dst, (u8 *)dst);
+ iv = dst;
+
+ src += 1;
+ dst += 1;
+ nbytes -= bsize;
+ } while (nbytes >= bsize);
+
+ u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv);
+ return nbytes;
+}
+
+static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt(desc, &walk);
+
+ while ((nbytes = walk.nbytes)) {
+ nbytes = __cbc_encrypt(desc, &walk);
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+
+ return err;
+}
+
+static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk)
+{
+ struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ 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 ivs[TWOFISH_PARALLEL_BLOCKS - 1];
+ u128 last_iv;
+ int i;
+
+ /* Start of the last block. */
+ src += nbytes / bsize - 1;
+ dst += nbytes / bsize - 1;
+
+ last_iv = *src;
+
+ /* Process multi-block batch */
+ if (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS) {
+ do {
+ nbytes -= bsize * (TWOFISH_PARALLEL_BLOCKS - 1);
+ src -= TWOFISH_PARALLEL_BLOCKS - 1;
+ dst -= TWOFISH_PARALLEL_BLOCKS - 1;
+
+ for (i = 0; i < TWOFISH_PARALLEL_BLOCKS - 1; i++)
+ ivs[i] = src[i];
+
+ twofish_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
+
+ for (i = 0; i < TWOFISH_PARALLEL_BLOCKS - 1; i++)
+ u128_xor(dst + (i + 1), dst + (i + 1), ivs + i);
+
+ nbytes -= bsize;
+ if (nbytes < bsize)
+ goto done;
+
+ u128_xor(dst, dst, src - 1);
+ src -= 1;
+ dst -= 1;
+ } while (nbytes >= bsize * TWOFISH_PARALLEL_BLOCKS);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Process three block batch */
+ if (nbytes >= bsize * 3) {
+ do {
+ nbytes -= bsize * (3 - 1);
+ src -= 3 - 1;
+ dst -= 3 - 1;
+
+ ivs[0] = src[0];
+ ivs[1] = src[1];
+
+ twofish_dec_blk_3way(ctx, (u8 *)dst, (u8 *)src);
+
+ u128_xor(dst + 1, dst + 1, ivs + 0);
+ u128_xor(dst + 2, dst + 2, ivs + 1);
+
+ nbytes -= bsize;
+ if (nbytes < bsize)
+ goto done;
+
+ u128_xor(dst, dst, src - 1);
+ src -= 1;
+ dst -= 1;
+ } while (nbytes >= bsize * 3);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Handle leftovers */
+ for (;;) {
+ twofish_dec_blk(ctx, (u8 *)dst, (u8 *)src);
+
+ nbytes -= bsize;
+ if (nbytes < bsize)
+ break;
+
+ u128_xor(dst, dst, src - 1);
+ src -= 1;
+ dst -= 1;
+ }
+
+done:
+ u128_xor(dst, dst, (u128 *)walk->iv);
+ *(u128 *)walk->iv = last_iv;
+
+ return nbytes;
+}
+
+static int cbc_decrypt(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(desc, &walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ while ((nbytes = walk.nbytes)) {
+ fpu_enabled = twofish_fpu_begin(fpu_enabled, nbytes);
+ nbytes = __cbc_decrypt(desc, &walk);
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+
+ twofish_fpu_end(fpu_enabled);
+ return err;
+}
+
+static inline void u128_to_be128(be128 *dst, const u128 *src)
+{
+ dst->a = cpu_to_be64(src->a);
+ dst->b = cpu_to_be64(src->b);
+}
+
+static inline void be128_to_u128(u128 *dst, const be128 *src)
+{
+ dst->a = be64_to_cpu(src->a);
+ dst->b = be64_to_cpu(src->b);
+}
+
+static inline void u128_inc(u128 *i)
+{
+ i->b++;
+ if (!i->b)
+ i->a++;
+}
+
+static void ctr_crypt_final(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk)
+{
+ struct twofish_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ u8 *ctrblk = walk->iv;
+ u8 keystream[TF_BLOCK_SIZE];
+ u8 *src = walk->src.virt.addr;
+ u8 *dst = walk->dst.virt.addr;
+ unsigned int nbytes = walk->nbytes;
+
+ twofish_enc_blk(ctx, keystream, ctrblk);
+ crypto_xor(keystream, src, nbytes);
+ memcpy(dst, keystream, nbytes);
+
+ crypto_inc(ctrblk, TF_BLOCK_SIZE);
+}
+
+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");
projects / profile / common / kernel-common.git / commitdiff