解决PHP中sm4加密算法与JAVA中sm4加密后的值不一致的问题

重点：在PHP中，需要使7及以上版本才行

两种方式如下：

第一种：使用系统自带方法做sm4加密，代码如下：

// 使用PHP系统方法，对字符串做sm4加密处理// 要加密的明文$plaintext = 'QCzqMc5n';// 双方约定好的密钥，转换16进制的密钥为二进制格式后，参与加密$key = hex2bin('这里是十六进制的字符串');$ciphertext = openssl_encrypt($plaintext, 'sm4-ecb', $key, OPENSSL_RAW_DATA);// 加密后的字符串，一定要将二进制的转成十六进制的，才与java加密后的一制$str = bin2hex($ciphertext);echo $str;exit;

第二种：使用自定义类做sm4加密

sM4KeySchedule($key);        $bytes = $this->pad($data, $this->_block_size);        $chunks = array_chunk($bytes, $this->_block_size);        $ciphertext = "";        foreach ($chunks as $chunk) {            $ciphertext .= $this->sM4Encrypt($chunk);        }        return base64_encode($ciphertext);    }    public function decrypt($key, $data)    {        $data = base64_decode($data);        if (strlen($data) < 0 || strlen($data) % $this->_block_size != 0) {            return false;        }        $this->sM4KeySchedule($key);        $bytes = unpack("C*", $data);        $chunks = array_chunk($bytes, $this->_block_size);        $plaintext = "";        foreach ($chunks as $chunk) {            $plaintext .= substr($this->sM4Decrypt($chunk), 0, 16);        }        $plaintext = $this->un_pad($plaintext);        return $plaintext;    }    private function sM4Decrypt($cipherText)    {        $x = [];        for ($j = 0; $j < 4; $j++) {            $x[$j] = ($cipherText[$j * 4] << 24) | ($cipherText[$j * 4 + 1] << 16) | ($cipherText[$j * 4 + 2] << 8) | ($cipherText[$j * 4 + 3]);        }        for ($i = 0; $i < 32; $i++) {            $tmp = $x[$i + 1] ^ $x[$i + 2] ^ $x[$i + 3] ^ $this->_rk[31 - $i];            $buf = (self::SM4_SBOX[($tmp >> 24) & 0xFF]) << 24 | (self::SM4_SBOX[($tmp >> 16) & 0xFF]) << 16 | (self::SM4_SBOX[($tmp >> 8) & 0xFF]) << 8 | (self::SM4_SBOX[$tmp & 0xFF]);            $x[$i + 4] = $x[$i] ^ ($buf ^ $this->sm4Rotl32(($buf), 2) ^ $this->sm4Rotl32(($buf), 10) ^ $this->sm4Rotl32(($buf), 18) ^ $this->sm4Rotl32(($buf), 24));        }        $plainText = [];        for ($k = 0; $k < 4; $k++) {            $plainText[4 * $k] = ($x[35 - $k] >> 24) & 0xFF;            $plainText[4 * $k + 1] = ($x[35 - $k] >> 16) & 0xFF;            $plainText[4 * $k + 2] = ($x[35 - $k] >> 8) & 0xFF;            $plainText[4 * $k + 3] = ($x[35 - $k]) & 0xFF;        }        return $this->bytesToString($plainText);    }    private function sM4Encrypt($plainText)    {        $x = [];        for ($j = 0; $j < 4; $j++) {            $x[$j] = ($plainText[$j * 4] << 24) | ($plainText[$j * 4 + 1] << 16) | ($plainText[$j * 4 + 2] << 8) | ($plainText[$j * 4 + 3]);        }        for ($i = 0; $i < 32; $i++) {            $tmp = $x[$i + 1] ^ $x[$i + 2] ^ $x[$i + 3] ^ $this->_rk[$i];            $buf = (self::SM4_SBOX[($tmp >> 24) & 0xFF]) << 24 | (self::SM4_SBOX[($tmp >> 16) & 0xFF]) << 16 | (self::SM4_SBOX[($tmp >> 8) & 0xFF]) << 8 | (self::SM4_SBOX[$tmp & 0xFF]);            $x[$i + 4] = $x[$i] ^ ($buf ^ $this->sm4Rotl32(($buf), 2) ^ $this->sm4Rotl32(($buf), 10) ^ $this->sm4Rotl32(($buf), 18) ^ $this->sm4Rotl32(($buf), 24));        }        $cipherText = [];        for ($k = 0; $k < 4; $k++) {            $cipherText[4 * $k] = ($x[35 - $k] >> 24) & 0xFF;            $cipherText[4 * $k + 1] = ($x[35 - $k] >> 16) & 0xFF;            $cipherText[4 * $k + 2] = ($x[35 - $k] >> 8) & 0xFF;            $cipherText[4 * $k + 3] = ($x[35 - $k]) & 0xFF;        }        return $this->bytesToString($cipherText);    }    private function stringToBytes($string)    {        return unpack('C*', $string);    }    private function bytesToString($bytes)    {        return vsprintf(str_repeat('%c', count($bytes)), $bytes);    }    private function pad($data)    {        $bytes = $this->stringToBytes($data);        $rem = $this->_block_size - count($bytes) % $this->_block_size;        for ($i = 0; $i < $rem; $i++) {            array_push($bytes, $rem);        }        return $bytes;    }    private function un_pad($data)    {        $bytes = $this->stringToBytes($data);        $rem = isset($bytes[count($bytes)]) ? $bytes[count($bytes)] : '';        $bytes = array_slice($bytes, 0, count($bytes) - $rem);        return $this->bytesToString($bytes);    }    private function sm4Rotl32($buf, $n)    {        return (($buf << $n) & 0xffffffff) | ($buf >> (32 - $n));    }    private function sM4KeySchedule($key)    {        $this->_rk = [];        $key = array_values(unpack("C*", $key));        $k = [];        for ($i = 0; $i < 4; $i++) {$a = isset($key[4 * $i]) ? $key[4 * $i] : '';$b = isset($key[4 * $i + 1]) ? $key[4 * $i + 1] : '';$c = isset($key[4 * $i + 2]) ? $key[4 * $i + 2] : '';$d = isset($key[4 * $i + 3]) ? $key[4 * $i + 3] : '';            $k[$i] = self::SM4_FK[$i] ^ (($a << 24) | ($b << 16) | ($c << 8) | $d);        }        for ($j = 0; $j < 32; $j++) {            $tmp = $k[$j + 1] ^ $k[$j + 2] ^ $k[$j + 3] ^ self::SM4_CK[$j];            $buf = (self::SM4_SBOX[($tmp >> 24) & 0xFF]) << 24 | (self::SM4_SBOX[($tmp >> 16) & 0xFF]) << 16 | (self::SM4_SBOX[($tmp >> 8) & 0xFF]) << 8 | (self::SM4_SBOX[$tmp & 0xFF]);            $k[$j + 4] = $k[$j] ^ (($buf) ^ ($this->sm4Rotl32(($buf), 13)) ^ ($this->sm4Rotl32(($buf), 23)));            $this->_rk[$j] = $k[$j + 4];        }    }}// 参与加密的密钥，最终为二进制的$key = hex2bin('这里是双方约定好的十六进制的密钥');// 需要加密的明文$data = 'QCzqMc5n';$sm4 = new SM4();echo "加密key：" . $key . "
";echo "明文：" . $data . "
"; $a = $sm4->encrypt($key, $data);// 得到的结果得先反转义base64编码，得到二进制，再转十六进制，才会与java的sm4加密后一制echo "加密结果：" . bin2hex(base64_decode($a)) . "
"; $b = $sm4->decrypt($key, $a);echo "解密结果：" . $b . "
";?>

来源地址：https://blog.csdn.net/liy819/article/details/132690627