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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Glue Code for the AVX/AES-NI/GFNI assembler implementation of the ARIA Cipher
*
* Copyright (c) 2022 Taehee Yoo <ap420073@gmail.com>
*/
#include <crypto/algapi.h>
#include <crypto/internal/simd.h>
#include <crypto/aria.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/types.h>
#include "ecb_cbc_helpers.h"
#include "aria-avx.h"
asmlinkage void aria_aesni_avx_encrypt_16way(const void *ctx, u8 *dst,
const u8 *src);
EXPORT_SYMBOL_GPL(aria_aesni_avx_encrypt_16way);
asmlinkage void aria_aesni_avx_decrypt_16way(const void *ctx, u8 *dst,
const u8 *src);
EXPORT_SYMBOL_GPL(aria_aesni_avx_decrypt_16way);
asmlinkage void aria_aesni_avx_ctr_crypt_16way(const void *ctx, u8 *dst,
const u8 *src,
u8 *keystream, u8 *iv);
EXPORT_SYMBOL_GPL(aria_aesni_avx_ctr_crypt_16way);
#ifdef CONFIG_AS_GFNI
asmlinkage void aria_aesni_avx_gfni_encrypt_16way(const void *ctx, u8 *dst,
const u8 *src);
EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_encrypt_16way);
asmlinkage void aria_aesni_avx_gfni_decrypt_16way(const void *ctx, u8 *dst,
const u8 *src);
EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_decrypt_16way);
asmlinkage void aria_aesni_avx_gfni_ctr_crypt_16way(const void *ctx, u8 *dst,
const u8 *src,
u8 *keystream, u8 *iv);
EXPORT_SYMBOL_GPL(aria_aesni_avx_gfni_ctr_crypt_16way);
#endif /* CONFIG_AS_GFNI */
static struct aria_avx_ops aria_ops;
struct aria_avx_request_ctx {
u8 keystream[ARIA_AESNI_PARALLEL_BLOCK_SIZE];
};
static int ecb_do_encrypt(struct skcipher_request *req, const u32 *rkey)
{
ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_encrypt_16way);
ECB_BLOCK(1, aria_encrypt);
ECB_WALK_END();
}
static int ecb_do_decrypt(struct skcipher_request *req, const u32 *rkey)
{
ECB_WALK_START(req, ARIA_BLOCK_SIZE, ARIA_AESNI_PARALLEL_BLOCKS);
ECB_BLOCK(ARIA_AESNI_PARALLEL_BLOCKS, aria_ops.aria_decrypt_16way);
ECB_BLOCK(1, aria_decrypt);
ECB_WALK_END();
}
static int aria_avx_ecb_encrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
return ecb_do_encrypt(req, ctx->enc_key[0]);
}
static int aria_avx_ecb_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
return ecb_do_decrypt(req, ctx->dec_key[0]);
}
static int aria_avx_set_key(struct crypto_skcipher *tfm, const u8 *key,
unsigned int keylen)
{
return aria_set_key(&tfm->base, key, keylen);
}
static int aria_avx_ctr_encrypt(struct skcipher_request *req)
{
struct aria_avx_request_ctx *req_ctx = skcipher_request_ctx(req);
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct aria_ctx *ctx = crypto_skcipher_ctx(tfm);
struct skcipher_walk walk;
unsigned int nbytes;
int err;
err = skcipher_walk_virt(&walk, req, false);
while ((nbytes = walk.nbytes) > 0) {
const u8 *src = walk.src.virt.addr;
u8 *dst = walk.dst.virt.addr;
while (nbytes >= ARIA_AESNI_PARALLEL_BLOCK_SIZE) {
kernel_fpu_begin();
aria_ops.aria_ctr_crypt_16way(ctx, dst, src,
&req_ctx->keystream[0],
walk.iv);
kernel_fpu_end();
dst += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
src += ARIA_AESNI_PARALLEL_BLOCK_SIZE;
nbytes -= ARIA_AESNI_PARALLEL_BLOCK_SIZE;
}
while (nbytes >= ARIA_BLOCK_SIZE) {
memcpy(&req_ctx->keystream[0], walk.iv, ARIA_BLOCK_SIZE);
crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
aria_encrypt(ctx, &req_ctx->keystream[0],
&req_ctx->keystream[0]);
crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
ARIA_BLOCK_SIZE);
dst += ARIA_BLOCK_SIZE;
src += ARIA_BLOCK_SIZE;
nbytes -= ARIA_BLOCK_SIZE;
}
if (walk.nbytes == walk.total && nbytes > 0) {
memcpy(&req_ctx->keystream[0], walk.iv,
ARIA_BLOCK_SIZE);
crypto_inc(walk.iv, ARIA_BLOCK_SIZE);
aria_encrypt(ctx, &req_ctx->keystream[0],
&req_ctx->keystream[0]);
crypto_xor_cpy(dst, src, &req_ctx->keystream[0],
nbytes);
dst += nbytes;
src += nbytes;
nbytes = 0;
}
err = skcipher_walk_done(&walk, nbytes);
}
return err;
}
static int aria_avx_init_tfm(struct crypto_skcipher *tfm)
{
crypto_skcipher_set_reqsize(tfm, sizeof(struct aria_avx_request_ctx));
return 0;
}
static struct skcipher_alg aria_algs[] = {
{
.base.cra_name = "__ecb(aria)",
.base.cra_driver_name = "__ecb-aria-avx",
.base.cra_priority = 400,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = ARIA_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct aria_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = ARIA_MIN_KEY_SIZE,
.max_keysize = ARIA_MAX_KEY_SIZE,
.setkey = aria_avx_set_key,
.encrypt = aria_avx_ecb_encrypt,
.decrypt = aria_avx_ecb_decrypt,
}, {
.base.cra_name = "__ctr(aria)",
.base.cra_driver_name = "__ctr-aria-avx",
.base.cra_priority = 400,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = 1,
.base.cra_ctxsize = sizeof(struct aria_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = ARIA_MIN_KEY_SIZE,
.max_keysize = ARIA_MAX_KEY_SIZE,
.ivsize = ARIA_BLOCK_SIZE,
.chunksize = ARIA_BLOCK_SIZE,
.walksize = 16 * ARIA_BLOCK_SIZE,
.setkey = aria_avx_set_key,
.encrypt = aria_avx_ctr_encrypt,
.decrypt = aria_avx_ctr_encrypt,
.init = aria_avx_init_tfm,
}
};
static struct simd_skcipher_alg *aria_simd_algs[ARRAY_SIZE(aria_algs)];
static int __init aria_avx_init(void)
{
const char *feature_name;
if (!boot_cpu_has(X86_FEATURE_AVX) ||
!boot_cpu_has(X86_FEATURE_AES) ||
!boot_cpu_has(X86_FEATURE_OSXSAVE)) {
pr_info("AVX or AES-NI instructions are not detected.\n");
return -ENODEV;
}
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;
}
if (boot_cpu_has(X86_FEATURE_GFNI) && IS_ENABLED(CONFIG_AS_GFNI)) {
aria_ops.aria_encrypt_16way = aria_aesni_avx_gfni_encrypt_16way;
aria_ops.aria_decrypt_16way = aria_aesni_avx_gfni_decrypt_16way;
aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_gfni_ctr_crypt_16way;
} else {
aria_ops.aria_encrypt_16way = aria_aesni_avx_encrypt_16way;
aria_ops.aria_decrypt_16way = aria_aesni_avx_decrypt_16way;
aria_ops.aria_ctr_crypt_16way = aria_aesni_avx_ctr_crypt_16way;
}
return simd_register_skciphers_compat(aria_algs,
ARRAY_SIZE(aria_algs),
aria_simd_algs);
}
static void __exit aria_avx_exit(void)
{
simd_unregister_skciphers(aria_algs, ARRAY_SIZE(aria_algs),
aria_simd_algs);
}
module_init(aria_avx_init);
module_exit(aria_avx_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Taehee Yoo <ap420073@gmail.com>");
MODULE_DESCRIPTION("ARIA Cipher Algorithm, AVX/AES-NI/GFNI optimized");
MODULE_ALIAS_CRYPTO("aria");
MODULE_ALIAS_CRYPTO("aria-aesni-avx");
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