简述
最近有需求要使用SM4算法传递信息，PHP加密，Java解密，网上找了一下
- PHP7可以使用gmssl的PHP拓展支持，http://gmssl.org/docs/php-api.html
- PHP5只能用https://github.com/fevin/gmsm
这边项目是PHP5版本的，上面这个拓展只实现了128bit的块加密，没有实现ecb，cbc等对称加密模式
自己实现了一下ecb，使用数组来处理bytes，PHP数组效率还是太低了，应该有更好的处理方式，不过时间有限，没深入这块
PHP SM4 ECB
<?php
/**
* 国密SM系列算法加密解密
* 需要安装拓展：https://github.com/fevin/gmsm
* Class SMCipher
*/
class SMCipher
{
private $key;
private $block_size = 16;
public function __construct($key)
{
$this->check_env();
$this->setKey($key);
}
/**
* 设置key
* @param $key
* @throws Exception
*/
public function setKey($key)
{
if (strlen($key) != $this->block_size) {
throw new Exception("invalid key");
}
$this->key = $key;
}
/**
* 检查拓展是否安装
* @throws Exception
*/
public function check_env()
{
if (!function_exists("sm4_encrypt")) {
throw new Exception("please install sm4 extension");
}
}
/**
* 按块大小，填充，PKCS7
* @param $data
* @param $block_size
* @return array
*/
public function pad($data, $block_size)
{
$bytes = $this->stringToBytes($data);
$rem = $block_size - count($bytes) % $block_size;
for ($i = 0; $i < $rem; $i++) {
array_push($bytes, $rem);
}
return $bytes;
}
/**
* 去掉填充字节
* @param $data
* @param $block_size
* @return string
*/
public function un_pad($data)
{
$bytes = $this->stringToBytes($data);
$rem = $bytes[count($bytes)];
$bytes = array_slice($bytes, 0, count($bytes) - $rem);
return $this->bytesToString($bytes);
}
/**
* string转换bytes
* @param $string
* @return array
*/
public function stringToBytes($string)
{
return unpack('c*', $string);
}
/**
* bytes转换string
* @param $bytes
* @return string
*/
public function bytesToString($bytes)
{
return vsprintf(str_repeat('%c', count($bytes)), $bytes);//bytes to string;
}
/**
* sm4-128-ecb加密
* @param $data
* @return bool|string
*/
public function sm4_encrypt_ecb($data)
{
if (strlen($data) < 0) {
return false;
}
$bytes = $this->pad($data, $this->block_size);
$ciphertext = "";
$chunks = array_chunk($bytes, $this->block_size);
foreach ($chunks as $chunk) {
$block = $this->bytesToString($chunk);
$ciphertext .= sm4_encrypt($block, $this->key);
}
return $ciphertext;
}
/**
* sm-128-ecb-base64加密
* @param $data
* @return string
*/
public function sm4_encrypt_ecb_base64($data)
{
return base64_encode($this->sm4_encrypt_ecb($data));
}
/**
* sm-128-ecb-base64解密
* @param $data
* @return bool|string
*/
public function sm4_decrypt_ecb_base64($data)
{
return $this->sm4_decrypt_ecb(base64_decode($data));
}
/**
* sm4-128-ecb解密
* @param $data
* @return bool|string
*/
public function sm4_decrypt_ecb($data)
{
if (strlen($data) < 0 || strlen($data) % $this->block_size != 0) {
return false;
}
$bytes = unpack("c*", $data);
$chunks = array_chunk($bytes, $this->block_size);
$plaintext = "";
foreach ($chunks as $chunk) {
$block = $this->bytesToString($chunk);
$plaintext .= substr(sm4_decrypt($block, $this->key), 0, 16);
}
$plaintext = $this->un_pad($plaintext);
return $plaintext;
}
}
Java SM4 ECB
对应的Java代码
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Arrays;
import java.util.Base64;
import java.util.Random;
/**
* 对称加密，密钥长度和分组长度均为128位。
* SM4 密码算法(原SMS4 密码算法) 本算法是一个分组算法。该算法的分组长度为128 比特，密钥长度为128 比特。
* 加密算法与密钥扩展算法都采用32 轮非线性迭代结构。
* 解密算法与加密算法的结构相同，只是轮密钥的使用顺序相反，解密轮密钥是加密轮密钥的逆序。
*/
public class SM4 {
public static final int SM4_ENCRYPT = 1;
public static final int SM4_DECRYPT = 0;
public static final String CHARSET = "utf-8";
public static final byte[] SboxTable = {
(byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe, (byte) 0xcc, (byte) 0xe1, 0x3d, (byte) 0xb7,
0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05,
0x2b, 0x67, (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3,
(byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06, (byte) 0x99,
(byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91, (byte) 0xef, (byte) 0x98, 0x7a,
0x33, 0x54, 0x0b, 0x43, (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62,
(byte) 0xe4, (byte) 0xb3, 0x1c, (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8, (byte) 0x95,
(byte) 0x80, (byte) 0xdf, (byte) 0x94, (byte) 0xfa, 0x75, (byte) 0x8f, 0x3f, (byte) 0xa6,
0x47, 0x07, (byte) 0xa7, (byte) 0xfc, (byte) 0xf3, 0x73, 0x17, (byte) 0xba,
(byte) 0x83, 0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8,
0x68, 0x6b, (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda, (byte) 0x8b,
(byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70, 0x56, (byte) 0x9d, 0x35,
0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1, (byte) 0xa2,
0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, (byte) 0x87,
(byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27, 0x52,
0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4, (byte) 0xc8, (byte) 0x9e,
(byte) 0xea, (byte) 0xbf, (byte) 0x8a, (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5,
(byte) 0xa3, (byte) 0xf7, (byte) 0xf2, (byte) 0xce, (byte) 0xf9, 0x61, 0x15, (byte) 0xa1,
(byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4, (byte) 0x9b, 0x34, 0x1a, 0x55,
(byte) 0xad, (byte) 0x93, 0x32, 0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3,
0x1d, (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca, 0x60,
(byte) 0xc0, 0x29, 0x23, (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f,
(byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd, (byte) 0x8e, 0x2f,
0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
(byte) 0x8d, 0x1b, (byte) 0xaf, (byte) 0x92, (byte) 0xbb, (byte) 0xdd, (byte) 0xbc, 0x7f,
0x11, (byte) 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, (byte) 0xd8,
0x0a, (byte) 0xc1, 0x31, (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd,
0x2d, 0x74, (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4, (byte) 0xb0,
(byte) 0x89, 0x69, (byte) 0x97, 0x4a, 0x0c, (byte) 0x96, 0x77, 0x7e,
0x65, (byte) 0xb9, (byte) 0xf1, 0x09, (byte) 0xc5, 0x6e, (byte) 0xc6, (byte) 0x84,
0x18, (byte) 0xf0, 0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20,
0x79, (byte) 0xee, 0x5f, 0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48
};
public static final int[] FK = {0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc};
public static final int[] CK = {
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
};
public void sm4_setkey_enc(SM4Context ctx, byte[] key) throws Exception {
if (ctx == null) {
throw new Exception("ctx is null!");
}
if (key == null || key.length != 16) {
throw new Exception("key error!");
}
ctx.mode = SM4_ENCRYPT;
sm4_setkey(ctx.sk, key);
}
public void sm4_setkey_dec(SM4Context ctx, byte[] key) throws Exception {
if (ctx == null) {
throw new Exception("ctx is null!");
}
if (key == null || key.length != 16) {
throw new Exception("key error!");
}
int i = 0;
ctx.mode = SM4_DECRYPT;
sm4_setkey(ctx.sk, key);
for (i = 0; i < 16; i++) {
SWAP(ctx.sk, i);
}
}
public byte[] sm4_crypt_ecb(SM4Context ctx, byte[] input) throws Exception {
if (input == null) {
throw new Exception("input is null!");
}
if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT)) {
input = padding(input, SM4_ENCRYPT);
}
int length = input.length;
ByteArrayInputStream bins = new ByteArrayInputStream(input);
ByteArrayOutputStream bous = new ByteArrayOutputStream();
for (; length > 0; length -= 16) {
byte[] in = new byte[16];
byte[] out = new byte[16];
bins.read(in);
sm4_one_round(ctx.sk, in, out);
bous.write(out);
}
byte[] output = bous.toByteArray();
if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
output = padding(output, SM4_DECRYPT);
}
bins.close();
bous.close();
return output;
}
public byte[] sm4_crypt_cbc(SM4Context ctx, byte[] iv, byte[] input) throws Exception {
if (iv == null || iv.length != 16) {
throw new Exception("iv error!");
}
if (input == null) {
throw new Exception("input is null!");
}
if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) {
input = padding(input, SM4_ENCRYPT);
}
int i = 0;
int length = input.length;
ByteArrayInputStream bins = new ByteArrayInputStream(input);
ByteArrayOutputStream bous = new ByteArrayOutputStream();
if (ctx.mode == SM4_ENCRYPT) {
for (; length > 0; length -= 16) {
byte[] in = new byte[16];
byte[] out = new byte[16];
byte[] out1 = new byte[16];
bins.read(in);
for (i = 0; i < 16; i++) {
out[i] = ((byte) (in[i] ^ iv[i]));
}
sm4_one_round(ctx.sk, out, out1);
System.arraycopy(out1, 0, iv, 0, 16);
bous.write(out1);
}
} else {
byte[] temp = new byte[16];
for (; length > 0; length -= 16) {
byte[] in = new byte[16];
byte[] out = new byte[16];
byte[] out1 = new byte[16];
bins.read(in);
System.arraycopy(in, 0, temp, 0, 16);
sm4_one_round(ctx.sk, in, out);
for (i = 0; i < 16; i++) {
out1[i] = ((byte) (out[i] ^ iv[i]));
}
System.arraycopy(temp, 0, iv, 0, 16);
bous.write(out1);
}
}
byte[] output = bous.toByteArray();
if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
output = padding(output, SM4_DECRYPT);
}
bins.close();
bous.close();
return output;
}
private long GET_ULONG_BE(byte[] b, int i) {
long n = (long) (b[i] & 0xff) << 24 | (long) ((b[i + 1] & 0xff) << 16)
| (long) ((b[i + 2] & 0xff) << 8) | (long) (b[i + 3] & 0xff) & 0xffffffffL;
return n;
}
private void PUT_ULONG_BE(long n, byte[] b, int i) {
b[i] = (byte) (int) (0xFF & n >> 24);
b[i + 1] = (byte) (int) (0xFF & n >> 16);
b[i + 2] = (byte) (int) (0xFF & n >> 8);
b[i + 3] = (byte) (int) (0xFF & n);
}
private long SHL(long x, int n) {
return (x & 0xFFFFFFFF) << n;
}
private long ROTL(long x, int n) {
return SHL(x, n) | x >> (32 - n);
}
private void SWAP(long[] sk, int i) {
long t = sk[i];
sk[i] = sk[(31 - i)];
sk[(31 - i)] = t;
}
private byte sm4Sbox(byte inch) {
int i = inch & 0xFF;
byte retVal = SboxTable[i];
return retVal;
}
private long sm4Lt(long ka) {
long bb = 0L;
long c = 0L;
byte[] a = new byte[4];
byte[] b = new byte[4];
PUT_ULONG_BE(ka, a, 0);
b[0] = sm4Sbox(a[0]);
b[1] = sm4Sbox(a[1]);
b[2] = sm4Sbox(a[2]);
b[3] = sm4Sbox(a[3]);
bb = GET_ULONG_BE(b, 0);
c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
return c;
}
private long sm4F(long x0, long x1, long x2, long x3, long rk) {
return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
}
private long sm4CalciRK(long ka) {
long bb = 0L;
long rk = 0L;
byte[] a = new byte[4];
byte[] b = new byte[4];
PUT_ULONG_BE(ka, a, 0);
b[0] = sm4Sbox(a[0]);
b[1] = sm4Sbox(a[1]);
b[2] = sm4Sbox(a[2]);
b[3] = sm4Sbox(a[3]);
bb = GET_ULONG_BE(b, 0);
rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
return rk;
}
private void sm4_setkey(long[] SK, byte[] key) {
long[] MK = new long[4];
long[] k = new long[36];
int i = 0;
MK[0] = GET_ULONG_BE(key, 0);
MK[1] = GET_ULONG_BE(key, 4);
MK[2] = GET_ULONG_BE(key, 8);
MK[3] = GET_ULONG_BE(key, 12);
k[0] = MK[0] ^ (long) FK[0];
k[1] = MK[1] ^ (long) FK[1];
k[2] = MK[2] ^ (long) FK[2];
k[3] = MK[3] ^ (long) FK[3];
for (; i < 32; i++) {
k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (long) CK[i]));
SK[i] = k[(i + 4)];
}
}
private void sm4_one_round(long[] sk, byte[] input, byte[] output) {
int i = 0;
long[] ulbuf = new long[36];
ulbuf[0] = GET_ULONG_BE(input, 0);
ulbuf[1] = GET_ULONG_BE(input, 4);
ulbuf[2] = GET_ULONG_BE(input, 8);
ulbuf[3] = GET_ULONG_BE(input, 12);
while (i < 32) {
ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
i++;
}
PUT_ULONG_BE(ulbuf[35], output, 0);
PUT_ULONG_BE(ulbuf[34], output, 4);
PUT_ULONG_BE(ulbuf[33], output, 8);
PUT_ULONG_BE(ulbuf[32], output, 12);
}
private byte[] padding(byte[] input, int mode) {
if (input == null) {
return null;
}
byte[] ret = (byte[]) null;
if (mode == SM4_ENCRYPT) {
int p = 16 - input.length % 16;
ret = new byte[input.length + p];
System.arraycopy(input, 0, ret, 0, input.length);
for (int i = 0; i < p; i++) {
ret[input.length + i] = (byte) p;
}
} else {
int p = input[input.length - 1];
ret = new byte[input.length - p];
System.arraycopy(input, 0, ret, 0, input.length - p);
}
return ret;
}
/**
* 描述：encryptBASE64 BASE64加密
*
* @param key
* @return
* @throws Exception
* @CreateOn 2016-3-14 下午03:33:05
* @author chun_chang
*/
public static String encryptBASE64(byte[] key) throws Exception {
return Base64.getEncoder().encodeToString(key);
}
/**
* 描述：decryptBASE64 BASE64解密
*
* @param key
* @return
* @throws Exception
* @CreateOn 2016-3-14 下午03:33:20
* @author chun_chang
*/
public static byte[] decryptBASE64(String key) throws Exception {
return Base64.getDecoder().decode(key.getBytes());
}
/**
* 随机秘钥
**/
public static String getKey() throws Exception {
String str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
Random rand = new Random();
String buff = "";
for (int i = 0; i < 16; i++) {
buff += str.charAt(rand.nextInt(str.length()));
}
return buff;
}
/**
* ECB加密
**/
public static String encryptData_ECB(String plainText, String keyBytes) {
String result = "";
try {
SM4 sm4 = new SM4();
SM4Context ctx = sm4.new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_ENCRYPT;
sm4.sm4_setkey_enc(ctx, keyBytes.getBytes(SM4.CHARSET));
byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes(SM4.CHARSET));
result = encryptBASE64(encrypted);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* ECB解密
**/
public static String decryptData_ECB(String cipherText, String keyBytes) {
String result = "";
try {
SM4 sm4 = new SM4();
SM4Context ctx = sm4.new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_DECRYPT;
sm4.sm4_setkey_dec(ctx, keyBytes.getBytes());
byte[] decrypted = sm4.sm4_crypt_ecb(ctx, decryptBASE64(cipherText));
result = new String(decrypted, SM4.CHARSET);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* CBC加密
**/
public static String encryptData_CBC(String plainText, String key, String iv) {
String result = "";
try {
SM4 sm4 = new SM4();
SM4Context ctx = sm4.new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_ENCRYPT;
sm4.sm4_setkey_enc(ctx, key.getBytes(SM4.CHARSET));
byte[] encrypted = sm4.sm4_crypt_cbc(ctx, iv.getBytes(SM4.CHARSET), plainText.getBytes(SM4.CHARSET));
result = encryptBASE64(encrypted);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* CBC解密
**/
public static String decryptData_CBC(String cipherText, String key, String iv) {
String result = "";
try {
SM4 sm4 = new SM4();
SM4Context ctx = sm4.new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_DECRYPT;
sm4.sm4_setkey_dec(ctx, key.getBytes(SM4.CHARSET));
byte[] decrypted = sm4.sm4_crypt_cbc(ctx, iv.getBytes(SM4.CHARSET), decryptBASE64(cipherText));
result = new String(decrypted, SM4.CHARSET);
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
class SM4Context {
public int mode;
public long[] sk;//key
public boolean isPadding;
public SM4Context() {
this.mode = 1;
this.isPadding = true;
this.sk = new long[32];
}
}
public static void main(String[] args) {
String key = "1234567890123456"; // 128 bit key
String[] testCases = {
"mima",
"很长很长很长很长很长很长很长很长很长很长很长很长很长很长很长很长很长",
"1234567890123456",
};
for (int i = 0; i < testCases.length; i++) {
System.out.printf("---------------test case%d start--------------\n", i);
String plaintext = testCases[i];
String ciphertext = "";
String decode = "";
ciphertext = SM4.encryptData_ECB(plaintext, key);
decode = SM4.decryptData_ECB(ciphertext, key);
System.out.printf("key:%s\n", key);
System.out.printf("plaintext:%s\n", plaintext);
System.out.printf("ciphertext:%s\n", ciphertext);
System.out.printf("decode:%s\n", decode);
System.out.printf("\n");
}
}
}