forked from mirrors/linux
5f60d5f6bb
asm/unaligned.h is always an include of asm-generic/unaligned.h; might as well move that thing to linux/unaligned.h and include that - there's nothing arch-specific in that header. auto-generated by the following: for i in `git grep -l -w asm/unaligned.h`; do sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i done for i in `git grep -l -w asm-generic/unaligned.h`; do sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i done git mv include/asm-generic/unaligned.h include/linux/unaligned.h git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
92 lines
2.1 KiB
C
92 lines
2.1 KiB
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 <linux/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)
|
|
{
|
|
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");
|