Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * SM4 Cipher Algorithm.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2018 ARM Limited or its affiliates.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <crypto/sm4.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static const u32 fk[4] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static const u8 sbox[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static const u32 ck[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static u32 sm4_t_non_lin_sub(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	u8 *b = (u8 *)&x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	for (i = 0; i < 4; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		b[i] = sbox[b[i]];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static u32 sm4_key_lin_sub(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	return x ^ rol32(x, 13) ^ rol32(x, 23);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static u32 sm4_enc_lin_sub(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	return x ^ rol32(x, 2) ^ rol32(x, 10) ^ rol32(x, 18) ^ rol32(x, 24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static u32 sm4_key_sub(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	return sm4_key_lin_sub(sm4_t_non_lin_sub(x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static u32 sm4_enc_sub(u32 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return sm4_enc_lin_sub(sm4_t_non_lin_sub(x));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static u32 sm4_round(const u32 *x, const u32 rk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	return x[0] ^ sm4_enc_sub(x[1] ^ x[2] ^ x[3] ^ rk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)  * crypto_sm4_expand_key - Expands the SM4 key as described in GB/T 32907-2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)  * @ctx:	The location where the computed key will be stored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)  * @in_key:	The supplied key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)  * @key_len:	The length of the supplied key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  * Returns 0 on success. The function fails only if an invalid key size (or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  * pointer) is supplied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int crypto_sm4_expand_key(struct crypto_sm4_ctx *ctx, const u8 *in_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			  unsigned int key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	u32 rk[4], t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	const u32 *key = (u32 *)in_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (key_len != SM4_KEY_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	for (i = 0; i < 4; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		rk[i] = get_unaligned_be32(&key[i]) ^ fk[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	for (i = 0; i < 32; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		t = rk[0] ^ sm4_key_sub(rk[1] ^ rk[2] ^ rk[3] ^ ck[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		ctx->rkey_enc[i] = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		rk[0] = rk[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		rk[1] = rk[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		rk[2] = rk[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		rk[3] = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	for (i = 0; i < 32; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		ctx->rkey_dec[i] = ctx->rkey_enc[31 - i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) EXPORT_SYMBOL_GPL(crypto_sm4_expand_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)  * crypto_sm4_set_key - Set the SM4 key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)  * @tfm:	The %crypto_tfm that is used in the context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)  * @in_key:	The input key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)  * @key_len:	The size of the key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)  * This function uses crypto_sm4_expand_key() to expand the key.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  * &crypto_sm4_ctx _must_ be the private data embedded in @tfm which is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  * retrieved with crypto_tfm_ctx().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)  * Return: 0 on success; -EINVAL on failure (only happens for bad key lengths)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) int crypto_sm4_set_key(struct crypto_tfm *tfm, const u8 *in_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		       unsigned int key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	return crypto_sm4_expand_key(ctx, in_key, key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) EXPORT_SYMBOL_GPL(crypto_sm4_set_key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static void sm4_do_crypt(const u32 *rk, u32 *out, const u32 *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	u32 x[4], i, t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	for (i = 0; i < 4; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		x[i] = get_unaligned_be32(&in[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	for (i = 0; i < 32; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		t = sm4_round(x, rk[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		x[0] = x[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		x[1] = x[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		x[2] = x[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		x[3] = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	for (i = 0; i < 4; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		put_unaligned_be32(x[3 - i], &out[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* encrypt a block of text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) void crypto_sm4_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	sm4_do_crypt(ctx->rkey_enc, (u32 *)out, (u32 *)in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) EXPORT_SYMBOL_GPL(crypto_sm4_encrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /* decrypt a block of text */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) void crypto_sm4_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	const struct crypto_sm4_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	sm4_do_crypt(ctx->rkey_dec, (u32 *)out, (u32 *)in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) EXPORT_SYMBOL_GPL(crypto_sm4_decrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static struct crypto_alg sm4_alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	.cra_name		=	"sm4",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	.cra_driver_name	=	"sm4-generic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	.cra_priority		=	100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	.cra_blocksize		=	SM4_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.cra_ctxsize		=	sizeof(struct crypto_sm4_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	.cra_module		=	THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	.cra_u			=	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		.cipher = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			.cia_min_keysize	=	SM4_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			.cia_max_keysize	=	SM4_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			.cia_setkey		=	crypto_sm4_set_key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			.cia_encrypt		=	crypto_sm4_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			.cia_decrypt		=	crypto_sm4_decrypt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int __init sm4_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	return crypto_register_alg(&sm4_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static void __exit sm4_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	crypto_unregister_alg(&sm4_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) subsys_initcall(sm4_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) module_exit(sm4_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) MODULE_DESCRIPTION("SM4 Cipher Algorithm");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) MODULE_ALIAS_CRYPTO("sm4");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) MODULE_ALIAS_CRYPTO("sm4-generic");