linux/crypto/sm4_generic.c

// SPDX-License-Identifier: GPL-2.0

/*
 * SM4 Cipher Algorithm.
 *
 * Copyright (C) 2018 ARM Limited or its affiliates.
 * All rights reserved.
 */

#include <crypto/algapi.h>
#include <crypto/sm4.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>

/**
 * 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)
{ … }

/* encrypt a block of text */

static void sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{ … }

/* decrypt a block of text */

static void sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{ … }

static struct crypto_alg sm4_alg = …;

static int __init sm4_init(void)
{ … }

static void __exit sm4_fini(void)
{ … }

subsys_initcall(sm4_init);
module_exit(sm4_fini);

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_ALIAS_CRYPTO(…) …;
MODULE_ALIAS_CRYPTO(…) …;