PHP5.6后没有encrypt扩展的时代

<?php 
class Aes{
    private $key = '6b4d63211b4ba869';
    private $iv = 'dbbf079b95004f65';
    public function aes128_cbc_encrypt($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(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $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 = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $this->decode_bytes($data), MCRYPT_MODE_CBC, $iv);
        $padding = ord($data[strlen($data) - 1]);
        return substr($data, 0, -$padding); 
    }
 
    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);
    }
}
 
$encrypted = 'ppmbnoahlffbpbjjhfegchdhjclbfpfaiopkmlflbohfphaagkndomcehakaopefmakbgenlomplmmpdmehffndpbmdmhgdaagddnhaifblckgendbajmjiafhcgpmjeabmbhaechabcadgpbcaiipcjmkdjidpnljhkedmghmepmmmkmcilpdaajcpdgkjknjlmfhmmdmeppdgppdamagokhjpmfggkkkcoihmaoakachkkomhjnienajiafojbbhfcohnjakcpneacofbmcdlfodhldhipipkbkghjiebejcahfcpoecbbdfmhdibodabhhklkjdgaljkhcffjkocahdkmchdhpegpgbapgcjdcigjchpjpogkgdaifaaipipccbmkeemhjecojohmcbfaacffgcfgidhhlijnminobnkjkphpdgkagpniimebjcfjlmaahllkpgplacbmlomajjilceffnfpljjaaddcpemjidpflenhjcjdebkcmbikfdjoefoallfnphflodmmbfinbfjhkbccgkppodahlnegdjmgliodhogmdelpiodogpkhahmjioojppmlikfkkkandkahdemccanfjlpikcccbhfkomdhlbndckeldlpdbnlngeclnjlleijlckpgleccbgbikjdlffcinkcknohdgejdhhnafmmagmcklekcalgehdgjnopfbclloolfpemdlaeigmibhgfpekdliebdjaekmbhclggkompigfddggmlnfgmaiehchlbjolmpnoddkihdfpfhpalbmgiilibooenngbbjblcbdleenhjcefnkdgmpbimhckgajlabljcjklfccmjncelphgggjilenhlnpjichiakijoohkppciblgnjdfpjlejglomdapccobblikhkbldffdljidbijblhfbdbglmihdhcclokagoolbpmlhagambeiphldgijnljkeibeaoofbniaifaambdidhchhomjndfmgffonbemboampjiolcndgnhhmnphofojpcnganphhfdmidmonmgbbafpfehigjmbjgdpkchjcodfiffmhladiockoaenljibmnadajdejanihgnohdagfennjkpepfmohemihojcehlephiegmmepaechepmpgejaafphnmkbnklldpliiadihdncdmobaodoghnpfopfejecglnmhhjlminmpfpbkjlhkegdioogefmoocbchnmkddcojjnhdalbcffmldfaihgpgncdjlnijeieddecdmhdoihoccfekcjgmpfhjpcfgdjbenkmmoknlobaihedjfgkonlglcbckpmgcgdeghjfefghhjfmnimhdpjejkelbofojeiloccdpmpembfpkdgignmkcopdganmmfjhhghbhghmflnldhhlaakijpggdbddiiamdnpljdobmckoaddlidiakepmbcfflineldjlefhdpdbmajmhcnnkcggombeonjheocojbhcjmfncdfjnlkibipkfjlbolcicgacdiebnchaafhjbiaalddcghpelbninjfcnbfmebkekbenliclimoknlpppgpkcbeaokfkgdafndepkbfjohdhdplmgpanamhimgkimmjpfcbcnbpjhglnpcfejkennjpieiceflbfbphgmdgkjliaaejgemfgmfiddcaecacfmdhmkdhblkijnandiddjobeelbahhhkaddffiphgnlmghjpdjbihcoekckfmkbokonoddfikaakaejaopekbhldpbmhhgdldjhbckjfjimccfchgnbcjpmiidiijkekijgcmgaoglimaoknmhgpghpjcodoblageapioildelbgibcdbfaiomcmlf';
 
$decrypt = '{"otaOrderId":"ctriptest-750476","sequenceId":"2019032816551049c5e34f57fc4a8ca9e4af8caf5b0ccb","confirmType":2,"items":[{"passengers":[{"cardIssuePlace":"","lastName":"","cardIssueCountry":"","shoeSize":0,"gender":"M","cardIssueDate":"","intlCode":"","nationalityName":"","mobile":"17600768354","cardType":"1","weight":0,"myopiaDegreeL":0,"birthDate":"1993-07-24","cardNo":"1301333199307243318","ageType":"ADU","myopiaDegreeR":0,"firstName":"","birthPlace":"","nationalityCode":"","name":"测试","cardValidDate":"","height":0}],"cost":0.00,"quantity":1,"remark":"这是备注","useEndDate":"2019-03-28","useStartDate":"2019-03-28","itemId":"ctriptest-750476-0","priceCurrency":"CNY","adjunctions":[],"price":49.00,"PLU":"472","deposit":{},"distributionChannel":"XCW","costCurrency":"HKD","expressDelivery":{"type":1}}],"contacts":[{"intlCode":"","name":"测试","mobile":"17600768354","optionalMobile":"","optionalIntlCode":"","email":"1450610915@qq.com"}]}';
 
$aec = new Aes();
//加密
echo $aec->aes128_cbc_decrypt($encrypted);
echo "<br>";
//解密
echo $aec->aes128_cbc_encrypt($decrypt);

/*
模式：
AES-128-CBC
AES-128-CFB
AES-128-CFB1
AES-128-CFB8
AES-128-OFB
AES-192-CBC
AES-192-CFB
AES-192-CFB1
AES-192-CFB8
AES-192-OFB
AES-256-CBC
AES-256-CFB
AES-256-CFB1
AES-256-CFB8
AES-256-OFB
BF-CBC
BF-CFB
BF-OFB
CAST5-CBC
CAST5-CFB
CAST5-OFB
IDEA-CBC
IDEA-CFB
IDEA-OFB
*/
/**
* 对明文进行解密
* @param string $data 需要解密的字符串
* @return string 加密后的密文
*/
 
 
public function openssldecrypt($data)
{
$decodemode = "des-ede3";
// 代码先base64编码下，这样错误的几率会小点哦
$decrypted = openssl_decrypt($data,$decodemode,base64_decode("aassddffgghh"),0);
return $decrypted;
}
 
/**
* 对明文进行加密
* @param string $text 需要加密的明文
* @return string 加密后的密文
*/
 
public function opensslencrypt($data)
{
$decodemode = "des-ede3";
$key = "aassddffgghh"; // 密钥 可以缺省的
$decrypted = openssl_encrypt($data,$decodemode, $key ,0);
return $decrypted;
}