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[其他相关] sm2国密加密算法php实现

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发表于 2021-10-28 11:12:03 | 显示全部楼层 |阅读模式

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sm2国密加密算法php实现

可自行验证是否是你需要的sm4加密算法
密钥:

  1. asw34a5ses5w81wf
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内容:

  1. 123456
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sm4加密后数据为:

  1. pPtSTSIVIjizeEY05GphVA==
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使用:

  1. <div><?php</div><div>include 'Sm4Helper.php';</div><div>$key = "asw34a5ses5w81wf";</div><div>
  2. </div><div>$sm4 = new Sm4Helper();</div><div>$data = '123456';</div><div>
  3. </div><div>$enc = $sm4->encrypt($key, $data);</div><div>echo "encrypt: $enc\n";</div><div>
  4. </div><div>$decdata = $sm4->decrypt($key, $enc);</div><div>echo "decrypt: $decdata\n";</div>
复制代码


Sm4Helper.php类:


  1. <?php


  2. /**
  3. * Sm4加密解密类
  4. * Class Sm4Helper
  5. * @package common\helpers
  6. */
  7. class Sm4Helper
  8. {
  9.     const SM4_CK = [
  10.         0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
  11.         0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
  12.         0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
  13.         0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
  14.         0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
  15.         0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
  16.         0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
  17.         0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279
  18.     ];

  19.     const SM4_SBOX = [
  20.         0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05,
  21.         0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99,
  22.         0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62,
  23.         0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6,
  24.         0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8,
  25.         0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35,
  26.         0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87,
  27.         0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e,
  28.         0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1,
  29.         0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3,
  30.         0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f,
  31.         0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51,
  32.         0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8,
  33.         0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0,
  34.         0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84,
  35.         0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48
  36.     ];

  37.     const SM4_FK = [0xA3B1BAC6, 0x56AA3350, 0x677D9197, 0xB27022DC];

  38.     public $_rk = [];
  39.     public $_block_size = 16;

  40.     public function __construct()
  41.     {
  42.     }

  43.     /**
  44.      * sm4加密(ecb)
  45.      * @param $key 16位十六进制的字符,比如asw34a5ses5w81wf
  46.      * @param $data 原始数据
  47.      * @return string
  48.      */
  49.     public function encrypt($key, $data)
  50.     {
  51.         $this->sm4KeySchedule($key);

  52.         $bytes = $this->pad($data, $this->_block_size);
  53.         $chunks = array_chunk($bytes, $this->_block_size);

  54.         $ciphertext = "";
  55.         foreach ($chunks as $chunk) {
  56.             $ciphertext .= $this->sm4Encrypt($chunk);
  57.         }

  58.         return base64_encode($ciphertext);
  59.     }

  60.     /**
  61.      * sm4解密
  62.      * @param $key
  63.      * @param $data
  64.      * @return bool|string
  65.      */
  66.     public function decrypt($key, $data)
  67.     {
  68.         $data = base64_decode($data);
  69.         if (strlen($data) < 0 || strlen($data) % $this->_block_size != 0) {
  70.             return false;
  71.         }

  72.         $this->sm4KeySchedule($key);
  73.         $bytes = unpack("C*", $data);
  74.         $chunks = array_chunk($bytes, $this->_block_size);

  75.         $plaintext = "";
  76.         foreach ($chunks as $chunk) {
  77.             $plaintext .= substr($this->sm4Decrypt($chunk), 0, 16);
  78.         }
  79.         $plaintext = $this->unPad($plaintext);

  80.         return $plaintext;
  81.     }

  82.     private function sm4Decrypt($cipherText)
  83.     {
  84.         $x = [];
  85.         for ($j=0; $j<4; $j++) {
  86.             $x[$j]=($cipherText[$j*4]<<24)  |($cipherText[$j*4+1]<<16)| ($cipherText[$j*4+2]<<8)|($cipherText[$j*4+3]);
  87.         }

  88.         for ($i=0; $i<32; $i++) {
  89.             $tmp = $x[$i+1]^$x[$i+2]^$x[$i+3]^$this->_rk[31-$i];
  90.             $buf= (self::SM4_SBOX[($tmp >> 24) & 0xFF]) << 24 |(self::SM4_SBOX[($tmp >> 16) & 0xFF]) << 16 |(self::SM4_SBOX[($tmp >> 8) & 0xFF]) << 8 |(self::SM4_SBOX[$tmp & 0xFF]);
  91.             $x[$i+4]=$x[$i]^($buf^$this->sm4Rotl32(($buf), 2)^ $this->sm4Rotl32(($buf), 10) ^ $this->sm4Rotl32(($buf), 18)^ $this->sm4Rotl32(($buf), 24));
  92.         }

  93.         $plainText = [];
  94.         for ($k=0; $k<4; $k++) {
  95.             $plainText[4*$k]=($x[35-$k]>> 24)& 0xFF;
  96.             $plainText[4*$k+1]=($x[35-$k]>> 16)& 0xFF;
  97.             $plainText[4*$k+2]=($x[35-$k]>> 8)& 0xFF;
  98.             $plainText[4*$k+3]=($x[35-$k])& 0xFF;
  99.         }

  100.         return $this->bytesToString($plainText);
  101.     }

  102.     private function sm4Encrypt($plainText)
  103.     {
  104.         $x = [];
  105.         for ($j=0; $j<4; $j++) {
  106.             $x[$j]=($plainText[$j*4]<<24)  |($plainText[$j*4+1]<<16)| ($plainText[$j*4+2]<<8)|($plainText[$j*4+3]);
  107.         }

  108.         for ($i=0; $i<32; $i++) {
  109.             $tmp = $x[$i+1]^$x[$i+2]^$x[$i+3]^$this->_rk[$i];
  110.             $buf= (self::SM4_SBOX[($tmp >> 24) & 0xFF]) << 24 |(self::SM4_SBOX[($tmp >> 16) & 0xFF]) << 16 |(self::SM4_SBOX[($tmp >> 8) & 0xFF]) << 8 |(self::SM4_SBOX[$tmp & 0xFF]);
  111.             $x[$i+4]=$x[$i]^($buf^$this->sm4Rotl32(($buf), 2)^ $this->sm4Rotl32(($buf), 10) ^ $this->sm4Rotl32(($buf), 18)^ $this->sm4Rotl32(($buf), 24));
  112.         }

  113.         $cipherText = [];
  114.         for ($k=0; $k<4; $k++) {
  115.             $cipherText[4*$k]=($x[35-$k]>> 24)& 0xFF;
  116.             $cipherText[4*$k+1]=($x[35-$k]>> 16)& 0xFF;
  117.             $cipherText[4*$k+2]=($x[35-$k]>> 8)& 0xFF;
  118.             $cipherText[4*$k+3]=($x[35-$k])& 0xFF;
  119.         }

  120.         return $this->bytesToString($cipherText);
  121.     }

  122.     private function stringToBytes($string)
  123.     {
  124.         return unpack('C*', $string);
  125.     }

  126.     private function bytesToString($bytes)
  127.     {
  128.         return vsprintf(str_repeat('%c', count($bytes)), $bytes);
  129.     }

  130.     private function pad($data)
  131.     {
  132.         $bytes = $this->stringToBytes($data);
  133.         $rem = $this->_block_size - count($bytes) % $this->_block_size;
  134.         for ($i = 0; $i < $rem; $i++) {
  135.             array_push($bytes, $rem);
  136.         }
  137.         return $bytes;
  138.     }

  139.     private function unPad($data)
  140.     {
  141.         $bytes = $this->stringToBytes($data);
  142.         $rem = $bytes[count($bytes)];
  143.         $bytes = array_slice($bytes, 0, count($bytes) - $rem);
  144.         return $this->bytesToString($bytes);
  145.     }

  146.     private function sm4Rotl32($buf, $n)
  147.     {
  148.         return (($buf << $n) & 0xffffffff) | ($buf >> (32-$n));
  149.     }

  150.     private function sm4KeySchedule($key)
  151.     {
  152.         $this->_rk = [];
  153.         $key = array_values(unpack("C*", $key));

  154.         $k = [];
  155.         for ($i=0; $i<4; $i++) {
  156.             $k[$i] = self::SM4_FK[$i]^(($key[4*$i]<<24) | ($key[4*$i+1]<<16) |($key[4*$i+2]<<8) | ($key[4*$i+3]));
  157.         }

  158.         for ($j=0; $j<32; $j++) {
  159.             $tmp = $k[$j+1]^$k[$j+2]^$k[$j+3]^ self::SM4_CK[$j];
  160.             $buf = (self::SM4_SBOX[($tmp >> 24) & 0xFF]) << 24 |(self::SM4_SBOX[($tmp >> 16) & 0xFF]) << 16 |(self::SM4_SBOX[($tmp >> 8) & 0xFF]) << 8 |(self::SM4_SBOX[$tmp & 0xFF]);

  161.             $k[$j+4]=$k[$j]^(($buf)^($this->sm4Rotl32(($buf), 13))^($this->sm4Rotl32(($buf), 23)));
  162.             $this->_rk[$j]=$k[$j+4];
  163.         }
  164.     }
  165. }
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demo: demo.php (7.26 KB, 下载次数: 7)
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