83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <asm/neon.h>
|
|
#include <asm/simd.h>
|
|
#include <crypto/sm4.h>
|
|
#include <crypto/internal/simd.h>
|
|
#include <linux/module.h>
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/types.h>
|
|
|
|
MODULE_ALIAS_CRYPTO("sm4");
|
|
MODULE_ALIAS_CRYPTO("sm4-ce");
|
|
MODULE_DESCRIPTION("SM4 symmetric cipher using ARMv8 Crypto Extensions");
|
|
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
asmlinkage void sm4_ce_do_crypt(const u32 *rk, void *out, const void *in);
|
|
|
|
static int sm4_ce_setkey(struct crypto_tfm *tfm, const u8 *key,
|
|
unsigned int key_len)
|
|
{
|
|
struct sm4_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
return sm4_expandkey(ctx, key, key_len);
|
|
}
|
|
|
|
static void sm4_ce_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
|
|
{
|
|
const struct sm4_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
if (!crypto_simd_usable()) {
|
|
sm4_crypt_block(ctx->rkey_enc, out, in);
|
|
} else {
|
|
kernel_neon_begin();
|
|
sm4_ce_do_crypt(ctx->rkey_enc, out, in);
|
|
kernel_neon_end();
|
|
}
|
|
}
|
|
|
|
static void sm4_ce_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
|
|
{
|
|
const struct sm4_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
if (!crypto_simd_usable()) {
|
|
sm4_crypt_block(ctx->rkey_dec, out, in);
|
|
} else {
|
|
kernel_neon_begin();
|
|
sm4_ce_do_crypt(ctx->rkey_dec, out, in);
|
|
kernel_neon_end();
|
|
}
|
|
}
|
|
|
|
static struct crypto_alg sm4_ce_alg = {
|
|
.cra_name = "sm4",
|
|
.cra_driver_name = "sm4-ce",
|
|
.cra_priority = 200,
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
|
|
.cra_blocksize = SM4_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sm4_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u.cipher = {
|
|
.cia_min_keysize = SM4_KEY_SIZE,
|
|
.cia_max_keysize = SM4_KEY_SIZE,
|
|
.cia_setkey = sm4_ce_setkey,
|
|
.cia_encrypt = sm4_ce_encrypt,
|
|
.cia_decrypt = sm4_ce_decrypt
|
|
}
|
|
};
|
|
|
|
static int __init sm4_ce_mod_init(void)
|
|
{
|
|
return crypto_register_alg(&sm4_ce_alg);
|
|
}
|
|
|
|
static void __exit sm4_ce_mod_fini(void)
|
|
{
|
|
crypto_unregister_alg(&sm4_ce_alg);
|
|
}
|
|
|
|
module_cpu_feature_match(SM4, sm4_ce_mod_init);
|
|
module_exit(sm4_ce_mod_fini);
|