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@@ -0,0 +1,648 @@
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+/*
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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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+ * 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/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/lrw.h>
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+#include <crypto/xts.h>
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+#include <asm/xcr.h>
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+#include <asm/xsave.h>
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+#include <asm/crypto/ablk_helper.h>
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+#include <asm/crypto/glue_helper.h>
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+
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+#define CAST6_PARALLEL_BLOCKS 8
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+
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+asmlinkage void __cast6_enc_blk_8way(struct cast6_ctx *ctx, u8 *dst,
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+ const u8 *src, bool xor);
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+asmlinkage void cast6_dec_blk_8way(struct cast6_ctx *ctx, u8 *dst,
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+ const u8 *src);
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+
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+static inline void cast6_enc_blk_xway(struct cast6_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ __cast6_enc_blk_8way(ctx, dst, src, false);
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+}
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+
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+static inline void cast6_enc_blk_xway_xor(struct cast6_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ __cast6_enc_blk_8way(ctx, dst, src, true);
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+}
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+
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+static inline void cast6_dec_blk_xway(struct cast6_ctx *ctx, u8 *dst,
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+ const u8 *src)
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+{
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+ cast6_dec_blk_8way(ctx, dst, src);
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+}
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+
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+
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+static void cast6_decrypt_cbc_xway(void *ctx, u128 *dst, const u128 *src)
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+{
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+ u128 ivs[CAST6_PARALLEL_BLOCKS - 1];
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+ unsigned int j;
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+
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+ for (j = 0; j < CAST6_PARALLEL_BLOCKS - 1; j++)
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+ ivs[j] = src[j];
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+
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+ cast6_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src);
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+
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+ for (j = 0; j < CAST6_PARALLEL_BLOCKS - 1; j++)
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+ u128_xor(dst + (j + 1), dst + (j + 1), ivs + j);
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+}
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+
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+static void cast6_crypt_ctr(void *ctx, u128 *dst, const u128 *src, u128 *iv)
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+{
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+ be128 ctrblk;
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+
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+ u128_to_be128(&ctrblk, iv);
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+ u128_inc(iv);
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+
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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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+
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+static void cast6_crypt_ctr_xway(void *ctx, u128 *dst, const u128 *src,
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+ u128 *iv)
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+{
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+ be128 ctrblks[CAST6_PARALLEL_BLOCKS];
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+ unsigned int i;
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+
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+ for (i = 0; i < CAST6_PARALLEL_BLOCKS; i++) {
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+ if (dst != src)
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+ dst[i] = src[i];
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+
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+ u128_to_be128(&ctrblks[i], iv);
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+ u128_inc(iv);
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+ }
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+
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+ cast6_enc_blk_xway_xor(ctx, (u8 *)dst, (u8 *)ctrblks);
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+}
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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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+
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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_enc_blk_xway) }
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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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+
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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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+
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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_crypt_ctr_xway) }
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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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+
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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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+
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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_dec_blk_xway) }
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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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+
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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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+
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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_decrypt_cbc_xway) }
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+static inline bool cast6_fpu_begin(bool fpu_enabled, unsigned int nbytes)
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+{
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+ return glue_fpu_begin(CAST6_BLOCK_SIZE, CAST6_PARALLEL_BLOCKS,
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+ NULL, fpu_enabled, nbytes);
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+}
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+
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+static inline void cast6_fpu_end(bool fpu_enabled)
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+{
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+ glue_fpu_end(fpu_enabled);
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+}
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+
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+struct crypt_priv {
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+ struct cast6_ctx *ctx;
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+ bool fpu_enabled;
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+};
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+
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+static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
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+{
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+ const unsigned int bsize = CAST6_BLOCK_SIZE;
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+ struct crypt_priv *ctx = priv;
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+ int i;
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+
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+ ctx->fpu_enabled = cast6_fpu_begin(ctx->fpu_enabled, nbytes);
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+
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+ if (nbytes == bsize * CAST6_PARALLEL_BLOCKS) {
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+ cast6_enc_blk_xway(ctx->ctx, srcdst, srcdst);
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+ return;
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+ }
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+
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+ for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
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+ __cast6_encrypt(ctx->ctx, srcdst, srcdst);
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+}
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+
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+static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
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+{
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+ const unsigned int bsize = CAST6_BLOCK_SIZE;
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+ struct crypt_priv *ctx = priv;
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+ int i;
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+
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+ ctx->fpu_enabled = cast6_fpu_begin(ctx->fpu_enabled, nbytes);
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+
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+ if (nbytes == bsize * CAST6_PARALLEL_BLOCKS) {
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+ cast6_dec_blk_xway(ctx->ctx, srcdst, srcdst);
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+ return;
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+ }
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+
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+ for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
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+ __cast6_decrypt(ctx->ctx, srcdst, srcdst);
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+}
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+
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+struct cast6_lrw_ctx {
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+ struct lrw_table_ctx lrw_table;
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+ struct cast6_ctx cast6_ctx;
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+};
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+
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+static int lrw_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_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
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+ int err;
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+
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+ err = __cast6_setkey(&ctx->cast6_ctx, key, keylen - CAST6_BLOCK_SIZE,
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+ &tfm->crt_flags);
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+ if (err)
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+ return err;
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+
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+ return lrw_init_table(&ctx->lrw_table, key + keylen - CAST6_BLOCK_SIZE);
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+}
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+
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+static int lrw_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_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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+ be128 buf[CAST6_PARALLEL_BLOCKS];
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+ struct crypt_priv crypt_ctx = {
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+ .ctx = &ctx->cast6_ctx,
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+ .fpu_enabled = false,
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+ };
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+ struct lrw_crypt_req req = {
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+ .tbuf = buf,
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+ .tbuflen = sizeof(buf),
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+
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+ .table_ctx = &ctx->lrw_table,
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+ .crypt_ctx = &crypt_ctx,
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+ .crypt_fn = encrypt_callback,
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+ };
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+ int ret;
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+
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+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
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+ cast6_fpu_end(crypt_ctx.fpu_enabled);
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+
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+ return ret;
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+}
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+
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+static int lrw_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_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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+ be128 buf[CAST6_PARALLEL_BLOCKS];
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+ struct crypt_priv crypt_ctx = {
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+ .ctx = &ctx->cast6_ctx,
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+ .fpu_enabled = false,
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+ };
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+ struct lrw_crypt_req req = {
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+ .tbuf = buf,
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+ .tbuflen = sizeof(buf),
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+
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+ .table_ctx = &ctx->lrw_table,
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+ .crypt_ctx = &crypt_ctx,
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+ .crypt_fn = decrypt_callback,
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+ };
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+ int ret;
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+
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+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
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+ cast6_fpu_end(crypt_ctx.fpu_enabled);
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+
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+ return ret;
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+}
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+
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+static void lrw_exit_tfm(struct crypto_tfm *tfm)
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+{
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+ struct cast6_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
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+
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+ lrw_free_table(&ctx->lrw_table);
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+}
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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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+
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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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+
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+ /* key consists of keys of equal size concatenated, therefore
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+ * the length must be even
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+ */
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+ if (keylen % 2) {
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+ *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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+ return -EINVAL;
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+ }
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+
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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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+
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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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+
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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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+ be128 buf[CAST6_PARALLEL_BLOCKS];
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+ struct crypt_priv crypt_ctx = {
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+ .ctx = &ctx->crypt_ctx,
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+ .fpu_enabled = false,
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+ };
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+ struct xts_crypt_req req = {
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+ .tbuf = buf,
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+ .tbuflen = sizeof(buf),
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+
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+ .tweak_ctx = &ctx->tweak_ctx,
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+ .tweak_fn = XTS_TWEAK_CAST(__cast6_encrypt),
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+ .crypt_ctx = &crypt_ctx,
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+ .crypt_fn = encrypt_callback,
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+ };
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+ int ret;
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+
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+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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+ ret = xts_crypt(desc, dst, src, nbytes, &req);
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+ cast6_fpu_end(crypt_ctx.fpu_enabled);
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+
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+ return ret;
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+}
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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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+ be128 buf[CAST6_PARALLEL_BLOCKS];
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+ struct crypt_priv crypt_ctx = {
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+ .ctx = &ctx->crypt_ctx,
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|
+ .fpu_enabled = false,
|
|
|
+ };
|
|
|
+ struct xts_crypt_req req = {
|
|
|
+ .tbuf = buf,
|
|
|
+ .tbuflen = sizeof(buf),
|
|
|
+
|
|
|
+ .tweak_ctx = &ctx->tweak_ctx,
|
|
|
+ .tweak_fn = XTS_TWEAK_CAST(__cast6_encrypt),
|
|
|
+ .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);
|
|
|
+ cast6_fpu_end(crypt_ctx.fpu_enabled);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static struct crypto_alg cast6_algs[10] = { {
|
|
|
+ .cra_name = "__ecb-cast6-avx",
|
|
|
+ .cra_driver_name = "__driver-ecb-cast6-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct cast6_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE,
|
|
|
+ .setkey = cast6_setkey,
|
|
|
+ .encrypt = ecb_encrypt,
|
|
|
+ .decrypt = ecb_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__cbc-cast6-avx",
|
|
|
+ .cra_driver_name = "__driver-cbc-cast6-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct cast6_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE,
|
|
|
+ .setkey = cast6_setkey,
|
|
|
+ .encrypt = cbc_encrypt,
|
|
|
+ .decrypt = cbc_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__ctr-cast6-avx",
|
|
|
+ .cra_driver_name = "__driver-ctr-cast6-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = 1,
|
|
|
+ .cra_ctxsize = sizeof(struct cast6_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = cast6_setkey,
|
|
|
+ .encrypt = ctr_crypt,
|
|
|
+ .decrypt = ctr_crypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__lrw-cast6-avx",
|
|
|
+ .cra_driver_name = "__driver-lrw-cast6-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct cast6_lrw_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_exit = lrw_exit_tfm,
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE +
|
|
|
+ CAST6_BLOCK_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE +
|
|
|
+ CAST6_BLOCK_SIZE,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = lrw_cast6_setkey,
|
|
|
+ .encrypt = lrw_encrypt,
|
|
|
+ .decrypt = lrw_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "__xts-cast6-avx",
|
|
|
+ .cra_driver_name = "__driver-xts-cast6-avx",
|
|
|
+ .cra_priority = 0,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct cast6_xts_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_blkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_u = {
|
|
|
+ .blkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE * 2,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE * 2,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = xts_cast6_setkey,
|
|
|
+ .encrypt = xts_encrypt,
|
|
|
+ .decrypt = xts_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "ecb(cast6)",
|
|
|
+ .cra_driver_name = "ecb-cast6-avx",
|
|
|
+ .cra_priority = 200,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "cbc(cast6)",
|
|
|
+ .cra_driver_name = "cbc-cast6-avx",
|
|
|
+ .cra_priority = 200,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = __ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "ctr(cast6)",
|
|
|
+ .cra_driver_name = "ctr-cast6-avx",
|
|
|
+ .cra_priority = 200,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = 1,
|
|
|
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_encrypt,
|
|
|
+ .geniv = "chainiv",
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "lrw(cast6)",
|
|
|
+ .cra_driver_name = "lrw-cast6-avx",
|
|
|
+ .cra_priority = 200,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE +
|
|
|
+ CAST6_BLOCK_SIZE,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE +
|
|
|
+ CAST6_BLOCK_SIZE,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+}, {
|
|
|
+ .cra_name = "xts(cast6)",
|
|
|
+ .cra_driver_name = "xts-cast6-avx",
|
|
|
+ .cra_priority = 200,
|
|
|
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
|
|
|
+ .cra_blocksize = CAST6_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
|
|
|
+ .cra_alignmask = 0,
|
|
|
+ .cra_type = &crypto_ablkcipher_type,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ .cra_init = ablk_init,
|
|
|
+ .cra_exit = ablk_exit,
|
|
|
+ .cra_u = {
|
|
|
+ .ablkcipher = {
|
|
|
+ .min_keysize = CAST6_MIN_KEY_SIZE * 2,
|
|
|
+ .max_keysize = CAST6_MAX_KEY_SIZE * 2,
|
|
|
+ .ivsize = CAST6_BLOCK_SIZE,
|
|
|
+ .setkey = ablk_set_key,
|
|
|
+ .encrypt = ablk_encrypt,
|
|
|
+ .decrypt = ablk_decrypt,
|
|
|
+ },
|
|
|
+ },
|
|
|
+} };
|
|
|
+
|
|
|
+static int __init cast6_init(void)
|
|
|
+{
|
|
|
+ u64 xcr0;
|
|
|
+
|
|
|
+ if (!cpu_has_avx || !cpu_has_osxsave) {
|
|
|
+ pr_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)) {
|
|
|
+ pr_info("AVX detected but unusable.\n");
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ return crypto_register_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit cast6_exit(void)
|
|
|
+{
|
|
|
+ crypto_unregister_algs(cast6_algs, ARRAY_SIZE(cast6_algs));
|
|
|
+}
|
|
|
+
|
|
|
+module_init(cast6_init);
|
|
|
+module_exit(cast6_exit);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("Cast6 Cipher Algorithm, AVX optimized");
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+MODULE_ALIAS("cast6");
|
Johannes Goetzfried