core/crypto/sm4.c - optee-os-mtk - Git at Google

 // SPDX-License-Identifier: BSD-2-Clause
 /*
  * Copyright Copyright (c) 2019 Huawei Technologies Co., Ltd
  */
 /*
  * SM4 Encryption algorithm (SMS4 algorithm)
  * GM/T 0002-2012 Chinese National Standard ref:http://www.oscca.gov.cn/
  * thanks to Xyssl
  * thnaks and refers to http://hi.baidu.com/numax/blog/item/80addfefddfb93e4cf1b3e61.html
  * author:goldboar
  * email:goldboar@163.com
  * 2012-4-20
  */

 #include "sm4.h"
 #include <assert.h>
 #include <string.h>

 #define GET_UINT32_BE(n, b, i)				\
 	do {						\
 		(n) = ((uint32_t)(b)[(i)] << 24)     |	\
 		      ((uint32_t)(b)[(i) + 1] << 16) |	\
 		      ((uint32_t)(b)[(i) + 2] <<  8) |	\
 		      ((uint32_t)(b)[(i) + 3]);		\
 	} while (0)

 #define PUT_UINT32_BE(n, b, i)				\
 	do {						\
 		(b)[(i)] = (uint8_t)((n) >> 24);	\
 		(b)[(i) + 1] = (uint8_t)((n) >> 16);	\
 		(b)[(i) + 2] = (uint8_t)((n) >>  8);	\
 		(b)[(i) + 3] = (uint8_t)((n));		\
 	} while (0)

 #define SHL(x, n)	(((x) & 0xFFFFFFFF) << (n))
 #define ROTL(x, n)	(SHL((x), (n)) | ((x) >> (32 - (n))))

 #define SWAP(a, b)	{ uint32_t t = a; a = b; b = t; t = 0; }

 /*
  * Expanded SM4 S-boxes
  */
 static const uint8_t SboxTable[16][16] =  {
 	{0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7,
 	 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05},
 	{0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3,
 	 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99},
 	{0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a,
 	 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62},
 	{0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95,
 	 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6},
 	{0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba,
 	 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8},
 	{0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b,
 	 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35},
 	{0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2,
 	 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87},
 	{0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52,
 	 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e},
 	{0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5,
 	 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1},
 	{0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
 	 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3},
 	{0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60,
 	 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f},
 	{0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f,
 	 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51},
 	{0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f,
 	 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8},
 	{0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd,
 	 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0},
 	{0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e,
 	 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84},
 	{0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20,
 	 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48}
 };

 /* System parameter */
 static const uint32_t FK[4] = {
 	0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc
 };

 /* Fixed parameter */
 static const uint32_t CK[32] = {
 	0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
 	0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
 	0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
 	0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
 	0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
 	0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
 	0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
 	0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
 };

 static uint8_t sm4Sbox(uint8_t inch)
 {
 	uint8_t *tab = (uint8_t *)SboxTable;

 	return tab[inch];
 }

 static uint32_t sm4Lt(uint32_t ka)
 {
 	uint32_t bb = 0;
 	uint8_t a[4];
 	uint8_t b[4];

 	PUT_UINT32_BE(ka, a, 0);
 	b[0] = sm4Sbox(a[0]);
 	b[1] = sm4Sbox(a[1]);
 	b[2] = sm4Sbox(a[2]);
 	b[3] = sm4Sbox(a[3]);
 	GET_UINT32_BE(bb, b, 0);

 	return bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
 }

 static uint32_t sm4F(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3,
 		     uint32_t rk)
 {
 	return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
 }

 static uint32_t sm4CalciRK(uint32_t ka)
 {
 	uint32_t bb = 0;
 	uint8_t a[4];
 	uint8_t b[4];

 	PUT_UINT32_BE(ka, a, 0);
 	b[0] = sm4Sbox(a[0]);
 	b[1] = sm4Sbox(a[1]);
 	b[2] = sm4Sbox(a[2]);
 	b[3] = sm4Sbox(a[3]);
 	GET_UINT32_BE(bb, b, 0);

 	return bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
 }

 static void sm4_setkey(uint32_t SK[32], const uint8_t key[16])
 {
 	uint32_t MK[4];
 	uint32_t k[36];
 	uint32_t i = 0;

 	GET_UINT32_BE(MK[0], key, 0);
 	GET_UINT32_BE(MK[1], key, 4);
 	GET_UINT32_BE(MK[2], key, 8);
 	GET_UINT32_BE(MK[3], key, 12);

 	k[0] = MK[0] ^ FK[0];
 	k[1] = MK[1] ^ FK[1];
 	k[2] = MK[2] ^ FK[2];
 	k[3] = MK[3] ^ FK[3];

 	for (i = 0; i < 32; i++) {
 		k[i + 4] = k[i] ^ sm4CalciRK(k[i + 1] ^ k[i + 2] ^ k[i + 3] ^
 					     CK[i]);
 		SK[i] = k[i + 4];
 	}
 }

 static void sm4_one_round(uint32_t sk[32], const uint8_t input[16],
 			  uint8_t output[16])
 {
 	uint32_t i = 0;
 	uint32_t ulbuf[36];

 	memset(ulbuf, 0, sizeof(ulbuf));

 	GET_UINT32_BE(ulbuf[0], input, 0);
 	GET_UINT32_BE(ulbuf[1], input, 4);
 	GET_UINT32_BE(ulbuf[2], input, 8);
 	GET_UINT32_BE(ulbuf[3], input, 12);

 	for (i = 0; i < 32; i++)
 		ulbuf[i + 4] = sm4F(ulbuf[i], ulbuf[i + 1], ulbuf[i + 2],
 				    ulbuf[i + 3], sk[i]);

 	PUT_UINT32_BE(ulbuf[35], output, 0);
 	PUT_UINT32_BE(ulbuf[34], output, 4);
 	PUT_UINT32_BE(ulbuf[33], output, 8);
 	PUT_UINT32_BE(ulbuf[32], output, 12);
 }

 void sm4_setkey_enc(struct sm4_context *ctx, const uint8_t key[16])
 {
 	ctx->mode = SM4_ENCRYPT;
 	sm4_setkey(ctx->sk, key);
 }

 void sm4_setkey_dec(struct sm4_context *ctx, const uint8_t key[16])
 {
 	int i;

 	ctx->mode = SM4_DECRYPT;
 	sm4_setkey(ctx->sk, key);

 	for (i = 0; i < 16; i++)
 		SWAP(ctx->sk[i], ctx->sk[31 - i]);
 }

 void sm4_crypt_ecb(struct sm4_context *ctx, size_t length, const uint8_t *input,
 		   uint8_t *output)
 {
 	assert(!(length % 16));

 	while (length > 0) {
 		sm4_one_round(ctx->sk, input, output);
 		input  += 16;
 		output += 16;
 		length -= 16;
 	}
 }

 void sm4_crypt_cbc(struct sm4_context *ctx, size_t length, uint8_t iv[16],
 		   const uint8_t *input, uint8_t *output)
 {
 	int i;
 	uint8_t temp[16];

 	assert(!(length % 16));

 	if (ctx->mode == SM4_ENCRYPT) {
 		while (length > 0) {
 			for (i = 0; i < 16; i++)
 				output[i] = (uint8_t)(input[i] ^ iv[i]);
 			sm4_one_round(ctx->sk, output, output);
 			memcpy(iv, output, 16);
 			input  += 16;
 			output += 16;
 			length -= 16;
 		}
 	} else {
 		/* SM4_DECRYPT */
 		while (length > 0) {
 			memcpy(temp, input, 16);
 			sm4_one_round(ctx->sk, input, output);
 			for (i = 0; i < 16; i++)
 				output[i] = (uint8_t)(output[i] ^ iv[i]);
 			memcpy(iv, temp, 16);
 			input  += 16;
 			output += 16;
 			length -= 16;
 		}
 	}
 }

 void sm4_crypt_ctr(struct sm4_context *ctx, size_t length, uint8_t ctr[16],
 		   const uint8_t *input, uint8_t *output)
 {
 	int i;
 	uint8_t temp[16];

 	assert(!(length % 16));

 	while (length > 0) {
 		memcpy(temp, ctr, 16);
 		sm4_one_round(ctx->sk, ctr, ctr);
 		for (i = 0; i < 16; i++)
 			output[i] = (uint8_t)(input[i] ^ ctr[i]);
 		memcpy(ctr, temp, 16);
 		for (i = 16; i > 0; i--)
 			if (++ctr[i - 1])
 				break;
 		input  += 16;
 		output += 16;
 		length -= 16;
 	}
 }
	// SPDX-License-Identifier: BSD-2-Clause
	/*
	* Copyright Copyright (c) 2019 Huawei Technologies Co., Ltd
	*/
	/*
	* SM4 Encryption algorithm (SMS4 algorithm)
	* GM/T 0002-2012 Chinese National Standard ref:http://www.oscca.gov.cn/
	* thanks to Xyssl
	* thnaks and refers to http://hi.baidu.com/numax/blog/item/80addfefddfb93e4cf1b3e61.html
	* author:goldboar
	* email:goldboar@163.com
	* 2012-4-20
	*/

	#include "sm4.h"
	#include <assert.h>
	#include <string.h>

	#define GET_UINT32_BE(n, b, i) \
	do { \
	(n) = ((uint32_t)(b)[(i)] << 24) \| \
	((uint32_t)(b)[(i) + 1] << 16) \| \
	((uint32_t)(b)[(i) + 2] << 8) \| \
	((uint32_t)(b)[(i) + 3]); \
	} while (0)

	#define PUT_UINT32_BE(n, b, i) \
	do { \
	(b)[(i)] = (uint8_t)((n) >> 24); \
	(b)[(i) + 1] = (uint8_t)((n) >> 16); \
	(b)[(i) + 2] = (uint8_t)((n) >> 8); \
	(b)[(i) + 3] = (uint8_t)((n)); \
	} while (0)

	#define SHL(x, n) (((x) & 0xFFFFFFFF) << (n))
	#define ROTL(x, n) (SHL((x), (n)) \| ((x) >> (32 - (n))))

	#define SWAP(a, b) { uint32_t t = a; a = b; b = t; t = 0; }

	/*
	* Expanded SM4 S-boxes
	*/
	static const uint8_t SboxTable[16][16] = {
	{0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7,
	0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05},
	{0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3,
	0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99},
	{0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a,
	0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62},
	{0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95,
	0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6},
	{0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba,
	0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8},
	{0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b,
	0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35},
	{0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2,
	0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87},
	{0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52,
	0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e},
	{0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5,
	0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1},
	{0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55,
	0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3},
	{0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60,
	0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f},
	{0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f,
	0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51},
	{0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f,
	0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8},
	{0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd,
	0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0},
	{0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e,
	0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84},
	{0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20,
	0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48}
	};

	/* System parameter */
	static const uint32_t FK[4] = {
	0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc
	};

	/* Fixed parameter */
	static const uint32_t CK[32] = {
	0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
	0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
	0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
	0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
	0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
	0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
	0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
	0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
	};

	static uint8_t sm4Sbox(uint8_t inch)
	{
	uint8_t tab = (uint8_t )SboxTable;

	return tab[inch];
	}

	static uint32_t sm4Lt(uint32_t ka)
	{
	uint32_t bb = 0;
	uint8_t a[4];
	uint8_t b[4];

	PUT_UINT32_BE(ka, a, 0);
	b[0] = sm4Sbox(a[0]);
	b[1] = sm4Sbox(a[1]);
	b[2] = sm4Sbox(a[2]);
	b[3] = sm4Sbox(a[3]);
	GET_UINT32_BE(bb, b, 0);

	return bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
	}

	static uint32_t sm4F(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3,
	uint32_t rk)
	{
	return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
	}

	static uint32_t sm4CalciRK(uint32_t ka)
	{
	uint32_t bb = 0;
	uint8_t a[4];
	uint8_t b[4];

	PUT_UINT32_BE(ka, a, 0);
	b[0] = sm4Sbox(a[0]);
	b[1] = sm4Sbox(a[1]);
	b[2] = sm4Sbox(a[2]);
	b[3] = sm4Sbox(a[3]);
	GET_UINT32_BE(bb, b, 0);

	return bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
	}

	static void sm4_setkey(uint32_t SK[32], const uint8_t key[16])
	{
	uint32_t MK[4];
	uint32_t k[36];
	uint32_t i = 0;

	GET_UINT32_BE(MK[0], key, 0);
	GET_UINT32_BE(MK[1], key, 4);
	GET_UINT32_BE(MK[2], key, 8);
	GET_UINT32_BE(MK[3], key, 12);

	k[0] = MK[0] ^ FK[0];
	k[1] = MK[1] ^ FK[1];
	k[2] = MK[2] ^ FK[2];
	k[3] = MK[3] ^ FK[3];

	for (i = 0; i < 32; i++) {
	k[i + 4] = k[i] ^ sm4CalciRK(k[i + 1] ^ k[i + 2] ^ k[i + 3] ^
	CK[i]);
	SK[i] = k[i + 4];
	}
	}

	static void sm4_one_round(uint32_t sk[32], const uint8_t input[16],
	uint8_t output[16])
	{
	uint32_t i = 0;
	uint32_t ulbuf[36];

	memset(ulbuf, 0, sizeof(ulbuf));

	GET_UINT32_BE(ulbuf[0], input, 0);
	GET_UINT32_BE(ulbuf[1], input, 4);
	GET_UINT32_BE(ulbuf[2], input, 8);
	GET_UINT32_BE(ulbuf[3], input, 12);

	for (i = 0; i < 32; i++)
	ulbuf[i + 4] = sm4F(ulbuf[i], ulbuf[i + 1], ulbuf[i + 2],
	ulbuf[i + 3], sk[i]);

	PUT_UINT32_BE(ulbuf[35], output, 0);
	PUT_UINT32_BE(ulbuf[34], output, 4);
	PUT_UINT32_BE(ulbuf[33], output, 8);
	PUT_UINT32_BE(ulbuf[32], output, 12);
	}

	void sm4_setkey_enc(struct sm4_context *ctx, const uint8_t key[16])
	{
	ctx->mode = SM4_ENCRYPT;
	sm4_setkey(ctx->sk, key);
	}

	void sm4_setkey_dec(struct sm4_context *ctx, const uint8_t key[16])
	{
	int i;

	ctx->mode = SM4_DECRYPT;
	sm4_setkey(ctx->sk, key);

	for (i = 0; i < 16; i++)
	SWAP(ctx->sk[i], ctx->sk[31 - i]);
	}

	void sm4_crypt_ecb(struct sm4_context ctx, size_t length, const uint8_t input,
	uint8_t *output)
	{
	assert(!(length % 16));

	while (length > 0) {
	sm4_one_round(ctx->sk, input, output);
	input += 16;
	output += 16;
	length -= 16;
	}
	}

	void sm4_crypt_cbc(struct sm4_context *ctx, size_t length, uint8_t iv[16],
	const uint8_t input, uint8_t output)
	{
	int i;
	uint8_t temp[16];

	assert(!(length % 16));

	if (ctx->mode == SM4_ENCRYPT) {
	while (length > 0) {
	for (i = 0; i < 16; i++)
	output[i] = (uint8_t)(input[i] ^ iv[i]);
	sm4_one_round(ctx->sk, output, output);
	memcpy(iv, output, 16);
	input += 16;
	output += 16;
	length -= 16;
	}
	} else {
	/* SM4_DECRYPT */
	while (length > 0) {
	memcpy(temp, input, 16);
	sm4_one_round(ctx->sk, input, output);
	for (i = 0; i < 16; i++)
	output[i] = (uint8_t)(output[i] ^ iv[i]);
	memcpy(iv, temp, 16);
	input += 16;
	output += 16;
	length -= 16;
	}
	}
	}

	void sm4_crypt_ctr(struct sm4_context *ctx, size_t length, uint8_t ctr[16],
	const uint8_t input, uint8_t output)
	{
	int i;
	uint8_t temp[16];

	assert(!(length % 16));

	while (length > 0) {
	memcpy(temp, ctr, 16);
	sm4_one_round(ctx->sk, ctr, ctr);
	for (i = 0; i < 16; i++)
	output[i] = (uint8_t)(input[i] ^ ctr[i]);
	memcpy(ctr, temp, 16);
	for (i = 16; i > 0; i--)
	if (++ctr[i - 1])
	break;
	input += 16;
	output += 16;
	length -= 16;
	}
	}