携程接口加解密_java携程接口文档解密

class CtripAesService
{
    private $key = 'xxx';
    private $iv = 'xxx';
    public function aes128_cbc_encrypt($data) {
        $key = $this->key;
        $iv = $this->iv;
        if(16 !== strlen($key)) $key = hash('MD5', $key, true);
        if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true);
        $padding = 16 - (strlen($data) % 16);
        $data .= str_repeat(chr($padding), $padding);
        return $this->encode_bytes(openssl_encrypt($data,'AES-128-CBC',$key,OPENSSL_RAW_DATA,$iv));
    }
 
    public function aes128_cbc_decrypt($data) {
        $key = $this->key;
        $iv = $this->iv;
        if(16 !== strlen($key)) $key = hash('MD5', $key, true);
        if(16 !== strlen($iv)) $iv = hash('MD5', $iv, true);
        $data=openssl_decrypt( $this->decode_bytes($data), "AES-128-CBC", $key, OPENSSL_RAW_DATA, $iv);
        return $data;
    }
 
    public function decode_bytes($text){
        $bytes=array();
        for($i=0;$i<strlen($text);$i+=2){
            $char=$text[$i];
            $bytes[$i/2]=chr((ord($char)-ord('a'))<<4);
            $char=$text[$i+1];
            $bytes[$i/2]=chr(ord($bytes[$i/2])+(ord($char)-ord('a')));
        }
 
        return join('',$bytes);
    }
 
    public function encode_bytes($text){
        $bytes=array();
        for($i=0;$i<strlen($text);$i++){
            $bytes[]=chr(((ord($text[$i])>>4)&15)+ord('a'));
            $bytes[]=chr((ord($text[$i]) & 15)+ord('a'));
        }
 
        return join('',$bytes);
    }
}