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linux-next/arch/x86/crypto/cast6_avx_glue.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Glue Code for the AVX assembler implementation of the Cast6 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/cast6.h>
#include <crypto/internal/simd.h>
#include <crypto/xts.h>
#include <asm/crypto/glue_helper.h>
#define CAST6_PARALLEL_BLOCKS 8
asmlinkage void cast6_ecb_enc_8way(struct cast6_ctx *ctx, u8 *dst,
const u8 *src);
asmlinkage void cast6_ecb_dec_8way(struct cast6_ctx *ctx, u8 *dst,
const u8 *src);
asmlinkage void cast6_cbc_dec_8way(struct cast6_ctx *ctx, u8 *dst,
const u8 *src);
asmlinkage void cast6_ctr_8way(struct cast6_ctx *ctx, u8 *dst, const u8 *src,
le128 *iv);
asmlinkage void cast6_xts_enc_8way(struct cast6_ctx *ctx, u8 *dst,
const u8 *src, le128 *iv);
asmlinkage void cast6_xts_dec_8way(struct cast6_ctx *ctx, u8 *dst,
const u8 *src, le128 *iv);
static int cast6_setkey_skcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
{
return cast6_setkey(&tfm->base, key, keylen);
}
static void cast6_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
glue_xts_crypt_128bit_one(ctx, dst, src, iv,
GLUE_FUNC_CAST(__cast6_encrypt));
}
static void cast6_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
glue_xts_crypt_128bit_one(ctx, dst, src, iv,
GLUE_FUNC_CAST(__cast6_decrypt));
}
static void cast6_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
be128 ctrblk;
le128_to_be128(&ctrblk, iv);
le128_inc(iv);
__cast6_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
u128_xor(dst, src, (u128 *)&ctrblk);
}
static const struct common_glue_ctx cast6_enc = {
.num_funcs = 2,
.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
.fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_enc_8way) }
}, {
.num_blocks = 1,
.fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_encrypt) }
} }
};
static const struct common_glue_ctx cast6_ctr = {
.num_funcs = 2,
.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_ctr_8way) }
}, {
.num_blocks = 1,
.fn_u = { .ctr = GLUE_CTR_FUNC_CAST(cast6_crypt_ctr) }
} }
};
static const struct common_glue_ctx cast6_enc_xts = {
.num_funcs = 2,
.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc_8way) }
}, {
.num_blocks = 1,
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_enc) }
} }
};
static const struct common_glue_ctx cast6_dec = {
.num_funcs = 2,
.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
.fn_u = { .ecb = GLUE_FUNC_CAST(cast6_ecb_dec_8way) }
}, {
.num_blocks = 1,
.fn_u = { .ecb = GLUE_FUNC_CAST(__cast6_decrypt) }
} }
};
static const struct common_glue_ctx cast6_dec_cbc = {
.num_funcs = 2,
.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(cast6_cbc_dec_8way) }
}, {
.num_blocks = 1,
.fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__cast6_decrypt) }
} }
};
static const struct common_glue_ctx cast6_dec_xts = {
.num_funcs = 2,
.fpu_blocks_limit = CAST6_PARALLEL_BLOCKS,
.funcs = { {
.num_blocks = CAST6_PARALLEL_BLOCKS,
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec_8way) }
}, {
.num_blocks = 1,
.fn_u = { .xts = GLUE_XTS_FUNC_CAST(cast6_xts_dec) }
} }
};
static int ecb_encrypt(struct skcipher_request *req)
{
return glue_ecb_req_128bit(&cast6_enc, req);
}
static int ecb_decrypt(struct skcipher_request *req)
{
return glue_ecb_req_128bit(&cast6_dec, req);
}
static int cbc_encrypt(struct skcipher_request *req)
{
return glue_cbc_encrypt_req_128bit(GLUE_FUNC_CAST(__cast6_encrypt),
req);
}
static int cbc_decrypt(struct skcipher_request *req)
{
return glue_cbc_decrypt_req_128bit(&cast6_dec_cbc, req);
}
static int ctr_crypt(struct skcipher_request *req)
{
return glue_ctr_req_128bit(&cast6_ctr, req);
}
struct cast6_xts_ctx {
struct cast6_ctx tweak_ctx;
struct cast6_ctx crypt_ctx;
};
static int xts_cast6_setkey(struct crypto_skcipher *tfm, const u8 *key,
unsigned int keylen)
{
struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
u32 *flags = &tfm->base.crt_flags;
int err;
err = xts_verify_key(tfm, key, keylen);
if (err)
return err;
/* first half of xts-key is for crypt */
err = __cast6_setkey(&ctx->crypt_ctx, key, keylen / 2, flags);
if (err)
return err;
/* second half of xts-key is for tweak */
return __cast6_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2,
flags);
}
static int xts_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
return glue_xts_req_128bit(&cast6_enc_xts, req,
XTS_TWEAK_CAST(__cast6_encrypt),
&ctx->tweak_ctx, &ctx->crypt_ctx);
}
static int xts_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct cast6_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
return glue_xts_req_128bit(&cast6_dec_xts, req,
XTS_TWEAK_CAST(__cast6_encrypt),
&ctx->tweak_ctx, &ctx->crypt_ctx);
}
static struct skcipher_alg cast6_algs[] = {
{
.base.cra_name = "__ecb(cast6)",
.base.cra_driver_name = "__ecb-cast6-avx",
.base.cra_priority = 200,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = CAST6_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct cast6_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = CAST6_MIN_KEY_SIZE,
.max_keysize = CAST6_MAX_KEY_SIZE,
.setkey = cast6_setkey_skcipher,
.encrypt = ecb_encrypt,
.decrypt = ecb_decrypt,
}, {
.base.cra_name = "__cbc(cast6)",
.base.cra_driver_name = "__cbc-cast6-avx",
.base.cra_priority = 200,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = CAST6_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct cast6_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = CAST6_MIN_KEY_SIZE,
.max_keysize = CAST6_MAX_KEY_SIZE,
.ivsize = CAST6_BLOCK_SIZE,
.setkey = cast6_setkey_skcipher,
.encrypt = cbc_encrypt,
.decrypt = cbc_decrypt,
}, {
.base.cra_name = "__ctr(cast6)",
.base.cra_driver_name = "__ctr-cast6-avx",
.base.cra_priority = 200,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = 1,
.base.cra_ctxsize = sizeof(struct cast6_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = CAST6_MIN_KEY_SIZE,
.max_keysize = CAST6_MAX_KEY_SIZE,
.ivsize = CAST6_BLOCK_SIZE,
.chunksize = CAST6_BLOCK_SIZE,
.setkey = cast6_setkey_skcipher,
.encrypt = ctr_crypt,
.decrypt = ctr_crypt,
}, {
.base.cra_name = "__xts(cast6)",
.base.cra_driver_name = "__xts-cast6-avx",
.base.cra_priority = 200,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = CAST6_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct cast6_xts_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = 2 * CAST6_MIN_KEY_SIZE,
.max_keysize = 2 * CAST6_MAX_KEY_SIZE,
.ivsize = CAST6_BLOCK_SIZE,
.setkey = xts_cast6_setkey,
.encrypt = xts_encrypt,
.decrypt = xts_decrypt,
},
};
static struct simd_skcipher_alg *cast6_simd_algs[ARRAY_SIZE(cast6_algs)];
static int __init cast6_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(cast6_algs,
ARRAY_SIZE(cast6_algs),
cast6_simd_algs);
}
static void __exit cast6_exit(void)
{
simd_unregister_skciphers(cast6_algs, ARRAY_SIZE(cast6_algs),
cast6_simd_algs);
}
module_init(cast6_init);
module_exit(cast6_exit);
MODULE_DESCRIPTION("Cast6 Cipher Algorithm, AVX optimized");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CRYPTO("cast6");
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