From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- crypto/sm4_generic.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 crypto/sm4_generic.c (limited to 'crypto/sm4_generic.c') diff --git a/crypto/sm4_generic.c b/crypto/sm4_generic.c new file mode 100644 index 000000000..4a6480a27 --- /dev/null +++ b/crypto/sm4_generic.c @@ -0,0 +1,92 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * SM4 Cipher Algorithm. + * + * Copyright (C) 2018 ARM Limited or its affiliates. + * All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/** + * sm4_setkey - Set the SM4 key. + * @tfm: The %crypto_tfm that is used in the context. + * @in_key: The input key. + * @key_len: The size of the key. + * + * This function uses sm4_expandkey() to expand the key. + * &sm4_ctx _must_ be the private data embedded in @tfm which is + * retrieved with crypto_tfm_ctx(). + * + * Return: 0 on success; -EINVAL on failure (only happens for bad key lengths) + */ +static int sm4_setkey(struct crypto_tfm *tfm, const u8 *in_key, + unsigned int key_len) +{ + struct sm4_ctx *ctx = crypto_tfm_ctx(tfm); + + return sm4_expandkey(ctx, in_key, key_len); +} + +/* encrypt a block of text */ + +static void sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) +{ + const struct sm4_ctx *ctx = crypto_tfm_ctx(tfm); + + sm4_crypt_block(ctx->rkey_enc, out, in); +} + +/* decrypt a block of text */ + +static void sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) +{ + const struct sm4_ctx *ctx = crypto_tfm_ctx(tfm); + + sm4_crypt_block(ctx->rkey_dec, out, in); +} + +static struct crypto_alg sm4_alg = { + .cra_name = "sm4", + .cra_driver_name = "sm4-generic", + .cra_priority = 100, + .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_setkey, + .cia_encrypt = sm4_encrypt, + .cia_decrypt = sm4_decrypt + } + } +}; + +static int __init sm4_init(void) +{ + return crypto_register_alg(&sm4_alg); +} + +static void __exit sm4_fini(void) +{ + crypto_unregister_alg(&sm4_alg); +} + +subsys_initcall(sm4_init); +module_exit(sm4_fini); + +MODULE_DESCRIPTION("SM4 Cipher Algorithm"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS_CRYPTO("sm4"); +MODULE_ALIAS_CRYPTO("sm4-generic"); -- cgit v1.2.3