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74 lines
1.8 KiB
74 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <asm/neon.h> |
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#include <asm/simd.h> |
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#include <crypto/sm4.h> |
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#include <crypto/internal/simd.h> |
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#include <linux/module.h> |
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#include <linux/cpufeature.h> |
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#include <linux/crypto.h> |
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#include <linux/types.h> |
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MODULE_ALIAS_CRYPTO("sm4"); |
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MODULE_ALIAS_CRYPTO("sm4-ce"); |
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MODULE_DESCRIPTION("SM4 symmetric cipher using ARMv8 Crypto Extensions"); |
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MODULE_AUTHOR("Ard Biesheuvel <[email protected]>"); |
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MODULE_LICENSE("GPL v2"); |
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asmlinkage void sm4_ce_do_crypt(const u32 *rk, void *out, const void *in); |
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static void sm4_ce_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
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{ |
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const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); |
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if (!crypto_simd_usable()) { |
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crypto_sm4_encrypt(tfm, out, in); |
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} else { |
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kernel_neon_begin(); |
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sm4_ce_do_crypt(ctx->rkey_enc, out, in); |
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kernel_neon_end(); |
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} |
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} |
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static void sm4_ce_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
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{ |
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const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm); |
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if (!crypto_simd_usable()) { |
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crypto_sm4_decrypt(tfm, out, in); |
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} else { |
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kernel_neon_begin(); |
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sm4_ce_do_crypt(ctx->rkey_dec, out, in); |
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kernel_neon_end(); |
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} |
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} |
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static struct crypto_alg sm4_ce_alg = { |
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.cra_name = "sm4", |
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.cra_driver_name = "sm4-ce", |
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.cra_priority = 200, |
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
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.cra_blocksize = SM4_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct crypto_sm4_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_u.cipher = { |
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.cia_min_keysize = SM4_KEY_SIZE, |
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.cia_max_keysize = SM4_KEY_SIZE, |
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.cia_setkey = crypto_sm4_set_key, |
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.cia_encrypt = sm4_ce_encrypt, |
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.cia_decrypt = sm4_ce_decrypt |
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} |
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}; |
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static int __init sm4_ce_mod_init(void) |
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{ |
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return crypto_register_alg(&sm4_ce_alg); |
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} |
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static void __exit sm4_ce_mod_fini(void) |
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{ |
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crypto_unregister_alg(&sm4_ce_alg); |
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} |
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module_cpu_feature_match(SM4, sm4_ce_mod_init); |
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module_exit(sm4_ce_mod_fini);
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