这篇文章主要为大家详细介绍了PHP SM4加密的实现,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
sm4基类
class Sm4{ private $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 ]; private $Sbox = [ 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 ]; private $fk = [0xA3B1BAC6, 0x56AA3350, 0x677D9197, 0xB27022DC]; private $rk = []; private $b = ''; private $len = 16; /** * Sm4 constructor. * @param string $key 秘钥长度16位 * @param string $b 不是16的倍数 需要的补码 * @throws \Exception */ public function __construct($key, $b = ' ') { $this->ck16($key); $this->crk($key); } private function dd(&$data) { $n = strlen($data) % $this->len; $data = $data . str_repeat($this->b, $n); } private function ck16($str) { if (strlen($str) !== $this->len) { throw new \Exception('秘钥长度为16位'); } } private function add($v) { $arr = unpack('N*', $v); $max = 0xffffffff; $j = 1; for ($i = 4; $i > 0; $i--) { if ($arr[$i] > $max - $j) { $j = 1; $arr[$i] = 0; } else { $arr[$i] += $j; break; } } return pack('N*', ...$arr); } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function deDataCtr($str, $iv) { return $this->enDataCtr($str, $iv); } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function enDataCtr($str, $iv) { $this->ck16($iv); $r = ''; $this->dd($str); $l = strlen($str) / $this->len; for ($i = 0; $i < $l; $i++) { $s = substr($str, $i * $this->len, $this->len); $tr = []; $this->encode(array_values(unpack('N*', $iv)), $tr); $s1 = pack('N*', ...$tr); $s1 = $s1 ^ $s; $iv = $this->add($iv); $r .= $s1; } return $r; } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function enDataOfb($str, $iv) { $this->ck16($iv); $r = ''; $this->dd($str); $l = strlen($str) / $this->len; for ($i = 0; $i < $l; $i++) { $s = substr($str, $i * $this->len, $this->len); $tr = []; $this->encode(array_values(unpack('N*', $iv)), $tr); $iv = pack('N*', ...$tr); $s1 = $s ^ $iv; $r .= $s1; } return $r; } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function deDataOfb($str, $iv) { return $this->enDataOfb($str, $iv); } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function deDataCfb($str, $iv) { $this->ck16($iv); $r = ''; $this->dd($str); $l = strlen($str) / $this->len; for ($i = 0; $i < $l; $i++) { $s = substr($str, $i * $this->len, $this->len); $tr = []; $this->encode(array_values(unpack('N*', $iv)), $tr); $s1 = pack('N*', ...$tr); $s1 = $s ^ $s1; $iv = $s; $r .= $s1; } return $r; } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function enDataCfb($str, $iv) { $this->ck16($iv); $r = ''; $this->dd($str); $l = strlen($str) / $this->len; for ($i = 0; $i < $l; $i++) { $s = substr($str, $i * $this->len, $this->len); $tr = []; $this->encode(array_values(unpack('N*', $iv)), $tr); $s1 = pack('N*', ...$tr); $iv = $s ^ $s1; $r .= $iv; } return $r; } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function enDataCbc($str, $iv) { $this->ck16($iv); $r = ''; $this->dd($str); $l = strlen($str) / $this->len; for ($i = 0; $i < $l; $i++) { $s = substr($str, $i * $this->len, $this->len); $s = $iv ^ $s; $tr = []; $this->encode(array_values(unpack('N*', $s)), $tr); $iv = pack('N*', ...$tr); $r .= $iv; } return $r; } /** * @param string $str 加密字符串 * @param string $iv 初始化字符串16位 * @return string * @throws \Exception */ public function deDataCbc($str, $iv) { $this->ck16($iv); $r = ''; $this->dd($str); $l = strlen($str) / $this->len; for ($i = 0; $i < $l; $i++) { $s = substr($str, $i * $this->len, $this->len); $tr = []; $this->decode(array_values(unpack('N*', $s)), $tr); $s1 = pack('N*', ...$tr); $s1 = $iv ^ $s1; $iv = $s; $r .= $s1; } return $r; } /** * @param string $str 加密字符串 * @return string */ public function enDataEcb($str) { $r = []; $this->dd($str); $ar = unpack('N*', $str); do { $this->encode([current($ar), next($ar), next($ar), next($ar)], $r); } while (next($ar)); return pack('N*', ...$r); } /** * @param string $str 解密字符串 * @return string */ public function deDataEcb($str) { $r = []; $this->dd($str); $ar = unpack('N*', $str); do { $this->decode([current($ar), next($ar), next($ar), next($ar)], $r); } while (next($ar)); return pack('N*', ...$r); } private function encode($ar, &$r) { for ($i = 0; $i < 32; $i++) { $ar[$i + 4] = $this->f($ar[$i], $ar[$i + 1], $ar[$i + 2], $ar[$i + 3], $this->rk[$i]); } $r[] = $ar[35]; $r[] = $ar[34]; $r[] = $ar[33]; $r[] = $ar[32]; } private function decode($ar, &$r) { for ($i = 0; $i < 32; $i++) { $ar[$i + 4] = $this->f($ar[$i], $ar[$i + 1], $ar[$i + 2], $ar[$i + 3], $this->rk[31 - $i]); } $r[] = $ar[35]; $r[] = $ar[34]; $r[] = $ar[33]; $r[] = $ar[32]; } private function crk($key) { $keys = array_values(unpack('N*', $key)); $keys = [ $keys[0] ^ $this->fk[0], $keys[1] ^ $this->fk[1], $keys[2] ^ $this->fk[2], $keys[3] ^ $this->fk[3] ]; for ($i = 0; $i < 32; $i++) { $this->rk[] = $keys[] = $keys[$i] ^ $this->t1($keys[$i + 1] ^ $keys[$i + 2] ^ $keys[$i + 3] ^ $this->ck[$i]); } } private function lm($a, $n) { return ($a >> (32 - $n) | (($a << $n) & 0xffffffff)); } private function f($x0, $x1, $x2, $x3, $r) { return $x0 ^ $this->t($x1 ^ $x2 ^ $x3 ^ $r); } private function s($n) { return $this->Sbox[($n & 0xff)] | $this->Sbox[(($n >> 8) & 0xff)] << 8 | $this->Sbox[(($n >> 16) & 0xff)] << 16 | $this->Sbox[(($n >> 24) & 0xff)] << 24; } private function t($n) { $b = $this->s($n); return $b ^ $this->lm($b, 2) ^ $this->lm($b, 10) ^ $this->lm($b, 18) ^ $this->lm($b, 24); } private function t1($n) { $b = $this->s($n); return $b ^ $this->lm($b, 13) ^ $this->lm($b, 23); }}调用类
class RtSm4{ protected $sm4; protected $keyLen = 16; protected $ivLen = 16; function __construct($key) { $this->sm4 = new Sm4($key); } public function encrypt($data, $type = 'sm4', $iv = '', $formatOut = 'hex') { if ($type != 'sm4-ecb') { $this->check_iv($iv); } $ret = ''; switch ($type) { case 'sm4': case 'sm4-cbc': $data = $this->mystr_pad($data, $this->keyLen); //需要补齐 $ret = $this->sm4->enDataCbc($data, $iv); break; case 'sm4-ecb': $data = $this->mystr_pad($data, $this->keyLen); //需要补齐 $ret = $this->sm4->enDataEcb($data); break; case 'sm4-ctr': $ret = $this->sm4->enDataCtr($data, $iv); break; case 'sm4-ofb': $ret = $this->sm4->enDataOfb($data, $iv); break; case 'sm4-cfb': $ret = $this->sm4->enDataCfb($data, $iv); break; default: throw new Exception('bad type'); } if ($formatOut == 'hex') { return bin2hex($ret); } else if ($formatOut == 'base64') { return base64_encode($ret); } return $ret; } public function decrypt($data, $type = 'sm4', $iv = '', $formatInput = 'hex') { if ($type != 'sm4-ecb') { $this->check_iv($iv); } if ($formatInput == 'hex') { $data = hex2bin($data); } else if ($formatInput == 'base64') { $data = base64_decode($data); } //else is raw switch ($type) { case 'sm4': case 'sm4-cbc': $ret = $this->sm4->deDataCbc($data, $iv); $ret = $this->mystr_unpad($ret); break; case 'sm4-ecb': $ret = $this->sm4->deDataEcb($data); $ret = $this->mystr_unpad($ret); break; case 'sm4-ctr': $ret = $this->sm4->deDataCtr($data, $iv); break; case 'sm4-ofb': $ret = $this->sm4->deDataOfb($data, $iv); break; case 'sm4-cfb': $ret = $this->sm4->deDataCfb($data, $iv); break; default: throw new Exception('bad type'); } return $ret; } //加密前补齐，特定后缀不适用全部的对接方 protected function mystr_pad($data, $len = 16) { $n = $len - strlen($data) % $len; $tmpString = $this->strToHex($data) . "80"; $tmpString .= str_repeat("00", $n - 1); return $this->hexToStr($tmpString); } // 解密后去掉补齐，特定后缀不适用全部的对接方 protected function mystr_unpad($data) { $tmp = $this->strToHex($data); $lastIndex = strrpos($tmp, '80'); if ($lastIndex !== false) { $tmp = substr($tmp, 0, $lastIndex); } return $this->hexToStr($tmp); } //加密前补齐，通用代码，无特定需求可用这个 protected function mystr_pad_bak($data, $len = 16) { $n = $len - strlen($data) % $len; return $data . str_repeat(chr($n), $n); } // 解密后去掉补齐 通用的代码，无特定需求可用这个 protected function mystr_unpad_bak($data) { $n = ord(substr($data, -1)); return substr($data, 0, -$n); } protected function check_iv($iv) { if (strlen($iv) != $this->ivLen) { throw new Exception('bad iv'); } } protected function strToHex($string) { $hex = unpack('H*', $string); return $hex[1]; } protected function hexToStr($hex) { $string = pack('H*', $hex); return $string; }}调用
$key = hex2bin('660e5d5xxxxxxx714f346e');$iv = hex2bin('abcd0863xxxxxf67');$sm4 = new RtSm4($key);$string = 'xxxx';$encodeText = $sm4->encrypt($string, 'sm4-cbc', $iv);echo $encodeText . PHP_EOL;echo $sm4->decrypt($encodeText, 'sm4-cbc', $iv). PHP_EOL;
