php opensll加解密类

 <?php

 $pri = "-----BEGIN RSA PRIVATE KEY-----
 MIICXQIBAAKBgQCzJc4RrAqaH2Es02XQ91Cqp/JK0yX893JQwFT2eAusnwQ90Bwu
 FQWdcZyKHP+I7XWMZc0qT/V/p51cq1d0OarPsuikth/43qP+1IWTYTv1i967pDnQ
 jXKbnm1dEMvjmS5hi7b/WwNfTi/VdAGLN0nxiHlX4+czjNHA3pCSQ9hCzwIDAQAB
 AoGAIF7aZ3MQz1yQMItaQHIPz2Zdb4vLt3P24gR+1bJHWb+6AnlSPjlqNFLNGF+5
 BMLzlJToh5a/I3vkAVSsjsHEzUl8OpbZm10toxH9UMpGd+2OdVYpceurRzIZ9/MF
 MuMBjv/+xukP4Nh8H6ekMGRMfoZtICAlj/kJxh7YlJlINfECQQDaarmknxzvw25k
 0SyLVsPffL3PQLHUZonFrwksGmk0XlTxgr+oUapi4SGVWuBkOjt7x4w8ktkiAtOZ
 tNtE3EALAkEA0flEzYg/cf170iUDtFEmWFLiBI8ajFC1rljaE4lFS67YCX+L1wnd
 5iQy29gV0qcxKme4bes+eUw+Jmeue0UuzQJBAJMJW/ZV4y4Jm4ylQF6BR5VxLXqT
 a+O4L7F0FzGoigBmLLr1MT8H0zODqY8ZQYxXo2m9uUuh9CiwTHDiTuZ5e2cCQGQ7
 3ylSUh8jR1mAy+znFCvznOtaOO0kliYdSjUrQUYot/6IwYOstR3ox9KEq548q863
 ZqYqN0+GIuEIe5Vi6D0CQQCp8fTMRCNtEAfRvYTV8PgxNE8pyIvntIeUT+MM+LGy
 4Xh2zYs7BiXeGx5mIT57QSYUsQKidYcneFyTl81oSgTQ
 -----END RSA PRIVATE KEY-----";

 $pub = "-----BEGIN PUBLIC KEY-----
 MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCzJc4RrAqaH2Es02XQ91Cqp/JK
 0yX893JQwFT2eAusnwQ90BwuFQWdcZyKHP+I7XWMZc0qT/V/p51cq1d0OarPsuik
 th/43qP+1IWTYTv1i967pDnQjXKbnm1dEMvjmS5hi7b/WwNfTi/VdAGLN0nxiHlX
 4+czjNHA3pCSQ9hCzwIDAQAB
 -----END PUBLIC KEY-----";

 $rsa = new mycrypt($pub,$pri);
 $encryptContent = $rsa -> encrypt('hankangkang');
 echo $encryptContent.'<br>';
 $decryptContent = $rsa -> decrypt($encryptContent);
 echo $decryptContent.'<br>';

 class mycrypt { 

 public $pubkey;
 public $privkey; 

 function __construct($pub,$pri) {
 $this->pubkey = $pub;
 $this->privkey = $pri;
 } 

 public function encrypt($data) {
 if (openssl_public_encrypt($data, $encrypted, $this->pubkey))
 $data = base64_encode($encrypted);
 else
 throw new Exception('Unable to encrypt data. Perhaps it is bigger than the key size?'); 

 return $data;
 } 

 public function decrypt($data) {
 if (openssl_private_decrypt(base64_decode($data), $decrypted, $this->privkey))
 $data = $decrypted;
 else
 $data = ''; 

 return $data;
 } 

 }