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sm4-riscv64-glue.c


products/Sources/formale Sprachen/C/Linux/arch/riscv/crypto/sm4-riscv64-glue.c

// SPDX-License-Identifier: GPL-2.0-only /* * SM4 using the RISC-V vector crypto extensions * * Copyright (C) 2023 VRULL GmbH * Author: Heiko Stuebner * * Copyright (C) 2023 SiFive, Inc. * Author: Jerry Shih */ #include #include #include #include #include #include #include asmlinkage void sm4_expandkey_zvksed_zvkb(const u8 user_key[SM4_KEY_SIZE], u32 rkey_enc[SM4_RKEY_WORDS], u32 rkey_dec[SM4_RKEY_WORDS]); asmlinkage void sm4_crypt_zvksed_zvkb(const u32 rkey[SM4_RKEY_WORDS], const u8 in[SM4_BLOCK_SIZE], u8 out[SM4_BLOCK_SIZE]); static int riscv64_sm4_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) { struct sm4_ctx *ctx = crypto_tfm_ctx(tfm); if (crypto_simd_usable()) { if (keylen != SM4_KEY_SIZE) return -EINVAL; kernel_vector_begin(); sm4_expandkey_zvksed_zvkb(key, ctx->rkey_enc, ctx->rkey_dec); kernel_vector_end(); return 0; } return sm4_expandkey(ctx, key, keylen); } static void riscv64_sm4_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { const struct sm4_ctx *ctx = crypto_tfm_ctx(tfm); if (crypto_simd_usable()) { kernel_vector_begin(); sm4_crypt_zvksed_zvkb(ctx->rkey_enc, src, dst); kernel_vector_end(); } else { sm4_crypt_block(ctx->rkey_enc, dst, src); } } static void riscv64_sm4_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { const struct sm4_ctx *ctx = crypto_tfm_ctx(tfm); if (crypto_simd_usable()) { kernel_vector_begin(); sm4_crypt_zvksed_zvkb(ctx->rkey_dec, src, dst); kernel_vector_end(); } else { sm4_crypt_block(ctx->rkey_dec, dst, src); } } static struct crypto_alg riscv64_sm4_alg = { .cra_flags = CRYPTO_ALG_TYPE_CIPHER, .cra_blocksize = SM4_BLOCK_SIZE, .cra_ctxsize = sizeof(struct sm4_ctx), .cra_priority = 300, .cra_name = "sm4", .cra_driver_name = "sm4-riscv64-zvksed-zvkb", .cra_cipher = { .cia_min_keysize = SM4_KEY_SIZE, .cia_max_keysize = SM4_KEY_SIZE, .cia_setkey = riscv64_sm4_setkey, .cia_encrypt = riscv64_sm4_encrypt, .cia_decrypt = riscv64_sm4_decrypt, }, .cra_module = THIS_MODULE, }; static int __init riscv64_sm4_mod_init(void) { if (riscv_isa_extension_available(NULL, ZVKSED) && riscv_isa_extension_available(NULL, ZVKB) && riscv_vector_vlen() >= 128) return crypto_register_alg(&riscv64_sm4_alg); return -ENODEV; } static void __exit riscv64_sm4_mod_exit(void) { crypto_unregister_alg(&riscv64_sm4_alg); } module_init(riscv64_sm4_mod_init); module_exit(riscv64_sm4_mod_exit); MODULE_DESCRIPTION("SM4 (RISC-V accelerated)"); MODULE_AUTHOR("Heiko Stuebner "); MODULE_LICENSE("GPL"); MODULE_ALIAS_CRYPTO("sm4");

                                                                                                                                                                                                                                                                                                                                                                                                     

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