1 files changed, 302 insertions, 0 deletions
diff --git a/arch/x86/crypto/twofish_avx_glue.c b/arch/x86/crypto/twofish_avx_glue.c
new file mode 100644
index 000000000..2dbc8ce37
--- /dev/null
+++ b/arch/x86/crypto/twofish_avx_glue.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Glue Code for AVX assembler version of Twofish Cipher
+ *
+ * Copyright (C) 2012 Johannes Goetzfried
+ *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
+ *
+ * Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/internal/simd.h>
+#include <crypto/twofish.h>
+#include <crypto/xts.h>
+#include <asm/crypto/glue_helper.h>
+#include <asm/crypto/twofish.h>
+
+#define TWOFISH_PARALLEL_BLOCKS 8
+
+/* 8-way parallel cipher functions */
+asmlinkage void twofish_ecb_enc_8way(const void *ctx, u8 *dst, const u8 *src);
+asmlinkage void twofish_ecb_dec_8way(const void *ctx, u8 *dst, const u8 *src);
+
+asmlinkage void twofish_cbc_dec_8way(const void *ctx, u8 *dst, const u8 *src);
+asmlinkage void twofish_ctr_8way(const void *ctx, u8 *dst, const u8 *src,
+				 le128 *iv);
+
+asmlinkage void twofish_xts_enc_8way(const void *ctx, u8 *dst, const u8 *src,
+				     le128 *iv);
+asmlinkage void twofish_xts_dec_8way(const void *ctx, u8 *dst, const u8 *src,
+				     le128 *iv);
+
+static int twofish_setkey_skcipher(struct crypto_skcipher *tfm,
+				   const u8 *key, unsigned int keylen)
+{
+	return twofish_setkey(&tfm->base, key, keylen);
+}
+
+static inline void twofish_enc_blk_3way(const void *ctx, u8 *dst, const u8 *src)
+{
+	__twofish_enc_blk_3way(ctx, dst, src, false);
+}
+
+static void twofish_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
+{
+	glue_xts_crypt_128bit_one(ctx, dst, src, iv, twofish_enc_blk);
+}
+
+static void twofish_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
+{
+	glue_xts_crypt_128bit_one(ctx, dst, src, iv, twofish_dec_blk);
+}
+
+struct twofish_xts_ctx {
+	struct twofish_ctx tweak_ctx;
+	struct twofish_ctx crypt_ctx;
+};
+
+static int xts_twofish_setkey(struct crypto_skcipher *tfm, const u8 *key,
+			      unsigned int keylen)
+{
+	struct twofish_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+	int err;
+
+	err = xts_verify_key(tfm, key, keylen);
+	if (err)
+		return err;
+
+	/* first half of xts-key is for crypt */
+	err = __twofish_setkey(&ctx->crypt_ctx, key, keylen / 2);
+	if (err)
+		return err;
+
+	/* second half of xts-key is for tweak */
+	return __twofish_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
+}
+
+static const struct common_glue_ctx twofish_enc = {
+	.num_funcs = 3,
+	.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = TWOFISH_PARALLEL_BLOCKS,
+		.fn_u = { .ecb = twofish_ecb_enc_8way }
+	}, {
+		.num_blocks = 3,
+		.fn_u = { .ecb = twofish_enc_blk_3way }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .ecb = twofish_enc_blk }
+	} }
+};
+
+static const struct common_glue_ctx twofish_ctr = {
+	.num_funcs = 3,
+	.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = TWOFISH_PARALLEL_BLOCKS,
+		.fn_u = { .ctr = twofish_ctr_8way }
+	}, {
+		.num_blocks = 3,
+		.fn_u = { .ctr = twofish_enc_blk_ctr_3way }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .ctr = twofish_enc_blk_ctr }
+	} }
+};
+
+static const struct common_glue_ctx twofish_enc_xts = {
+	.num_funcs = 2,
+	.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = TWOFISH_PARALLEL_BLOCKS,
+		.fn_u = { .xts = twofish_xts_enc_8way }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .xts = twofish_xts_enc }
+	} }
+};
+
+static const struct common_glue_ctx twofish_dec = {
+	.num_funcs = 3,
+	.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = TWOFISH_PARALLEL_BLOCKS,
+		.fn_u = { .ecb = twofish_ecb_dec_8way }
+	}, {
+		.num_blocks = 3,
+		.fn_u = { .ecb = twofish_dec_blk_3way }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .ecb = twofish_dec_blk }
+	} }
+};
+
+static const struct common_glue_ctx twofish_dec_cbc = {
+	.num_funcs = 3,
+	.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = TWOFISH_PARALLEL_BLOCKS,
+		.fn_u = { .cbc = twofish_cbc_dec_8way }
+	}, {
+		.num_blocks = 3,
+		.fn_u = { .cbc = twofish_dec_blk_cbc_3way }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .cbc = twofish_dec_blk }
+	} }
+};
+
+static const struct common_glue_ctx twofish_dec_xts = {
+	.num_funcs = 2,
+	.fpu_blocks_limit = TWOFISH_PARALLEL_BLOCKS,
+
+	.funcs = { {
+		.num_blocks = TWOFISH_PARALLEL_BLOCKS,
+		.fn_u = { .xts = twofish_xts_dec_8way }
+	}, {
+		.num_blocks = 1,
+		.fn_u = { .xts = twofish_xts_dec }
+	} }
+};
+
+static int ecb_encrypt(struct skcipher_request *req)
+{
+	return glue_ecb_req_128bit(&twofish_enc, req);
+}
+
+static int ecb_decrypt(struct skcipher_request *req)
+{
+	return glue_ecb_req_128bit(&twofish_dec, req);
+}
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+	return glue_cbc_encrypt_req_128bit(twofish_enc_blk, req);
+}
+
+static int cbc_decrypt(struct skcipher_request *req)
+{
+	return glue_cbc_decrypt_req_128bit(&twofish_dec_cbc, req);
+}
+
+static int ctr_crypt(struct skcipher_request *req)
+{
+	return glue_ctr_req_128bit(&twofish_ctr, req);
+}
+
+static int xts_encrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct twofish_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	return glue_xts_req_128bit(&twofish_enc_xts, req, twofish_enc_blk,
+				   &ctx->tweak_ctx, &ctx->crypt_ctx, false);
+}
+
+static int xts_decrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct twofish_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+
+	return glue_xts_req_128bit(&twofish_dec_xts, req, twofish_enc_blk,
+				   &ctx->tweak_ctx, &ctx->crypt_ctx, true);
+}
+
+static struct skcipher_alg twofish_algs[] = {
+	{
+		.base.cra_name		= "__ecb(twofish)",
+		.base.cra_driver_name	= "__ecb-twofish-avx",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= TF_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct twofish_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= TF_MIN_KEY_SIZE,
+		.max_keysize		= TF_MAX_KEY_SIZE,
+		.setkey			= twofish_setkey_skcipher,
+		.encrypt		= ecb_encrypt,
+		.decrypt		= ecb_decrypt,
+	}, {
+		.base.cra_name		= "__cbc(twofish)",
+		.base.cra_driver_name	= "__cbc-twofish-avx",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= TF_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct twofish_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= TF_MIN_KEY_SIZE,
+		.max_keysize		= TF_MAX_KEY_SIZE,
+		.ivsize			= TF_BLOCK_SIZE,
+		.setkey			= twofish_setkey_skcipher,
+		.encrypt		= cbc_encrypt,
+		.decrypt		= cbc_decrypt,
+	}, {
+		.base.cra_name		= "__ctr(twofish)",
+		.base.cra_driver_name	= "__ctr-twofish-avx",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= 1,
+		.base.cra_ctxsize	= sizeof(struct twofish_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= TF_MIN_KEY_SIZE,
+		.max_keysize		= TF_MAX_KEY_SIZE,
+		.ivsize			= TF_BLOCK_SIZE,
+		.chunksize		= TF_BLOCK_SIZE,
+		.setkey			= twofish_setkey_skcipher,
+		.encrypt		= ctr_crypt,
+		.decrypt		= ctr_crypt,
+	}, {
+		.base.cra_name		= "__xts(twofish)",
+		.base.cra_driver_name	= "__xts-twofish-avx",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_INTERNAL,
+		.base.cra_blocksize	= TF_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct twofish_xts_ctx),
+		.base.cra_module	= THIS_MODULE,
+		.min_keysize		= 2 * TF_MIN_KEY_SIZE,
+		.max_keysize		= 2 * TF_MAX_KEY_SIZE,
+		.ivsize			= TF_BLOCK_SIZE,
+		.setkey			= xts_twofish_setkey,
+		.encrypt		= xts_encrypt,
+		.decrypt		= xts_decrypt,
+	},
+};
+
+static struct simd_skcipher_alg *twofish_simd_algs[ARRAY_SIZE(twofish_algs)];
+
+static int __init twofish_init(void)
+{
+	const char *feature_name;
+
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, &feature_name)) {
+		pr_info("CPU feature '%s' is not supported.\n", feature_name);
+		return -ENODEV;
+	}
+
+	return simd_register_skciphers_compat(twofish_algs,
+					      ARRAY_SIZE(twofish_algs),
+					      twofish_simd_algs);
+}
+
+static void __exit twofish_exit(void)
+{
+	simd_unregister_skciphers(twofish_algs, ARRAY_SIZE(twofish_algs),
+				  twofish_simd_algs);
+}
+
+module_init(twofish_init);
+module_exit(twofish_exit);
+
+MODULE_DESCRIPTION("Twofish Cipher Algorithm, AVX optimized");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CRYPTO("twofish");