1 // SPDX-License-Identifier: GPL-2.0
5 #include <crypto/sm4.h>
6 #include <linux/module.h>
7 #include <linux/cpufeature.h>
8 #include <linux/crypto.h>
9 #include <linux/types.h>
11 MODULE_ALIAS_CRYPTO("sm4");
12 MODULE_ALIAS_CRYPTO("sm4-ce");
13 MODULE_DESCRIPTION("SM4 symmetric cipher using ARMv8 Crypto Extensions");
14 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
15 MODULE_LICENSE("GPL v2");
17 asmlinkage void sm4_ce_do_crypt(const u32 *rk, void *out, const void *in);
19 static void sm4_ce_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
21 const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
23 if (!may_use_simd()) {
24 crypto_sm4_encrypt(tfm, out, in);
27 sm4_ce_do_crypt(ctx->rkey_enc, out, in);
32 static void sm4_ce_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
34 const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
36 if (!may_use_simd()) {
37 crypto_sm4_decrypt(tfm, out, in);
40 sm4_ce_do_crypt(ctx->rkey_dec, out, in);
45 static struct crypto_alg sm4_ce_alg = {
47 .cra_driver_name = "sm4-ce",
49 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
50 .cra_blocksize = SM4_BLOCK_SIZE,
51 .cra_ctxsize = sizeof(struct crypto_sm4_ctx),
52 .cra_module = THIS_MODULE,
54 .cia_min_keysize = SM4_KEY_SIZE,
55 .cia_max_keysize = SM4_KEY_SIZE,
56 .cia_setkey = crypto_sm4_set_key,
57 .cia_encrypt = sm4_ce_encrypt,
58 .cia_decrypt = sm4_ce_decrypt
62 static int __init sm4_ce_mod_init(void)
64 return crypto_register_alg(&sm4_ce_alg);
67 static void __exit sm4_ce_mod_fini(void)
69 crypto_unregister_alg(&sm4_ce_alg);
72 module_cpu_feature_match(SM3, sm4_ce_mod_init);
73 module_exit(sm4_ce_mod_fini);