php国密sm4

加解密代码摘自网络，出处忘记了，这里就不附链接，对原创说声抱歉！
先附上代码：

32){return substr($hex,0,32);}else{return $hex;}}/**设置加密秘钥** @param $key 32个十六进制的字符** @return $this* @throws Exception*/public function setKey($key){$key = $this->strToHex($key);$this->key = $this->preProcess($key);$this->setSkey();return $this;}/*** 计算每轮加密需要的秘钥*/private function setSkey(){$skey = [];for ($i = 0; $i < 4; $i++) {$skey[] = self::SM4_FK[$i] ^ ($this->key[4 * $i] << 24 | $this->key[4 * $i + 1] << 16 | $this->key[4 * $i + 2] << 8 | $this->key[4 * $i + 3]);}for ($k = 0; $k < 32; $k++) {$tmp = $skey[$k + 1] ^ $skey[$k + 2] ^ $skey[$k + 3] ^ self::SM4_CK[$k];//非线性化操作$buf = (self::SM4_Sbox[($tmp >> 24) & 0xff]) << 24 |(self::SM4_Sbox[($tmp >> 16) & 0xff]) << 16 |(self::SM4_Sbox[($tmp >> 8) & 0xff]) << 8 |(self::SM4_Sbox[$tmp & 0xff]);//线性化操作$skey[] = $skey[$k] ^ ($buf ^ $this->sm4Rotl32($buf, 13) ^ $this->sm4Rotl32($buf, 23));$this->skey[] = $skey[$k + 4];}}/**32比特的buffer中循环左移n位** @param $buf int 可以传递进10进制 也可以是0b开头的二进制* @param $n int 向左偏移n位** @return int* reference http://blog.csdn.net/w845695652/article/details/6522285*/private function sm4Rotl32($buf, $n){return (($buf << $n) & 0xffffffff) | ($buf >> (32 - $n));}/*** 对字符串加密** @param $plainText** @return string* @throws Exception*/public function encryptData($plainText){$bytes = bin2hex($plainText);$need_pad_length = $this->block_size - strlen($bytes) % $this->block_size;$pad_bytes = str_pad($bytes,strlen($bytes) + $need_pad_length,sprintf("%02x", $need_pad_length / 2),STR_PAD_RIGHT);$chunks = str_split($pad_bytes, $this->block_size);return strtolower(implode('', array_map(function ($chunk) {return $this->encrypt($chunk);}, $chunks)));}/**SM4加密单个片段(128bit)** @param $text string 32个十六进制字符串** @return string* @throws Exception*/public function encrypt($text){$x = $re = [];$t = $this->preProcess($text);for ($i = 0; $i < 4; $i++) {$x[] = $t[$i * 4] << 24 |$t[$i * 4 + 1] << 16 |$t[$i * 4 + 2] << 8 |$t[$i * 4 + 3];}for ($k = 0; $k < 32; $k++) {$tmp = $x[$k + 1] ^ $x[$k + 2] ^ $x[$k + 3] ^ $this->skey[$k];$buf = self::SM4_Sbox[($tmp >> 24) & 0xff] << 24 |self::SM4_Sbox[($tmp >> 16) & 0xff] << 16 |self::SM4_Sbox[($tmp >> 8) & 0xff] << 8 |self::SM4_Sbox[$tmp & 0xff];$x[$k + 4] = $x[$k] ^ $buf^ $this->sm4Rotl32($buf, 2)^ $this->sm4Rotl32($buf, 10)^ $this->sm4Rotl32($buf, 18)^ $this->sm4Rotl32($buf, 24);}for ($i = 0; $i < 4; $i++) {$re[] = ($x[35 - $i] >> 24) & 0xff;$re[] = ($x[35 - $i] >> 16) & 0xff;$re[] = ($x[35 - $i] >> 8) & 0xff;$re[] = $x[35 - $i] & 0xff;}return $this->wrapResult($re);}/**预处理16字节长度的16进制字符串 返回10进制的数组 数组大小为16** @param $text** @return array* @throws Exception*/private function preProcess($text){preg_match('/[0-9a-f]{32}/', strtolower($text), $re);if (empty($re)) {throw new Exception('error input format!');}$key = $re[0];for ($i = 0; $i < 16; $i++) {$result[] = hexdec($key[2 * $i] . $key[2 * $i + 1]);}return $result;}/**将十进制结果包装成16进制字符串输出** @param $result** @return string*/private function wrapResult($result){$hex_str = '';foreach ($result as $v) {$tmp = dechex($v);$len = strlen($tmp);if ($len == 1)//不足两位十六进制的数 在前面补一个0,保证输出也是32个16进制字符{$hex_str .= '0';}$hex_str .= $tmp;}return strtoupper($hex_str);}/**SM4解密单个片段(128bits)** @param $text string 32个16进制字符串** @return string* @throws Exception*/public function decrypt($text){$x = $re = [];$t = $this->preProcess($text);for ($i = 0; $i < 4; $i++) {$x[] = $t[4 * $i] << 24 |$t[4 * $i + 1] << 16 |$t[4 * $i + 2] << 8 |$t[4 * $i + 3];}for ($k = 0; $k < 32; $k++) {$tmp = $x[$k + 1] ^ $x[$k + 2] ^ $x[$k + 3] ^ $this->skey[31 - $k];$buf = (self::SM4_Sbox[($tmp >> 24) & 0xff]) << 24 |(self::SM4_Sbox[($tmp >> 16) & 0xff]) << 16 |(self::SM4_Sbox[($tmp >> 8) & 0xff]) << 8 |(self::SM4_Sbox[$tmp & 0xff]);$x[$k + 4] = $x[$k] ^ $buf^ $this->sm4Rotl32($buf, 2)^ $this->sm4Rotl32($buf, 10)^ $this->sm4Rotl32($buf, 18)^ $this->sm4Rotl32($buf, 24);}for ($i = 0; $i < 4; $i++) {$re[] = ($x[35 - $i] >> 24) & 0xff;$re[] = ($x[35 - $i] >> 16) & 0xff;$re[] = ($x[35 - $i] >> 8) & 0xff;$re[] = $x[35 - $i] & 0xff;}return $this->wrapResult($re);}public function decryptData($cipherText){$chunks = str_split($cipherText, $this->block_size);$decrypt_text_data = implode('', array_map(function ($chunk) {return $this->decrypt($chunk);}, $chunks));$pad_length = hexdec(substr($decrypt_text_data, -2));return strtolower(hex2bin(preg_replace(sprintf("/%s$/", str_repeat(sprintf("%02x", $pad_length), $pad_length)),'',$decrypt_text_data)));}}$data=["DOC_ID"=>"",'STATE'=>"1"
];
$sm4 = new SM4Util();
$original_plain_text_data = json_encode($data,true);$key = 'henan202012272GOVCms';$origin_encrypted_text = '798c4eceb3a46ca50fe55331e472ffee1b9a88e2847156252c009b3a1c8a1d1c';
$encrypted_text_data = $sm4->setKey($key)->encryptData($original_plain_text_data);
echo '
';
echo"自己加密：".$encrypted_text_data;
echo '
长度：'.strlen($encrypted_text_data);
echo '
';
echo"自己解密：". $sm4->setKey($key)->decryptData($encrypted_text_data);echo '
';echo"原文------：".$origin_encrypted_text;
echo '
长度：'.strlen($origin_encrypted_text);
//$encrypted_text_2_plain_text = $sm4->setKey($key)->decryptData($encrypted_text_data);
$original_decrypted_text = $sm4->setKey($key)->decryptData($origin_encrypted_text);
echo '
';
echo "原文解密：".$original_decrypted_text ;
echo '
';//echo "明文：" . $data . "\n";
//$a = $sm4->encrypt($key, $data);
//echo "加密结果：" . $a . "\n";
//$b = $sm4->decrypt($key, $data);
//var_dump($b);exit;
//echo "解密结果：" . $b . "\n";//list($t1, $t2) = explode(' ', microtime());
//$st = (float)sprintf('%.0f', (floatval($t1) + floatval($t2)) * 1000);
//for ($i = 0; $i< 1000; $i++) {
//    $sm4 = new SM4();
//    $a = $sm4->encrypt($key, $data);
//}
//list($t1, $t2) = explode(' ', microtime());
//$et = (float)sprintf('%.0f', (floatval($t1) + floatval($t2)) * 1000);
//$endtime = $et-$st;
//
//echo "time:" . $endtime . "\n";

我这里要说明的是，php分32位和64位2个版本，我在使用上述方法时，对接的接口，64位可用。so，32位和64位加密结果不一致，需要注意版本！

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