php RSA public and private key encryption and authentication usage

Now many projects will be used to rsa encryption and decryption and verification related technologies, we are finishing the following code, easy to remember and use.

[Signature and verification]

 1 //获得签名
 2 function getSign($data) {
 3     $pem =  'my_rsa_private_key.pem';
 4     $privateKey = openssl_get_privatekey(file_get_contents($pem));
 5     openssl_sign($data, $sign, $privateKey);
 6     openssl_free_key($privateKey);
 7     return base64_encode($sign);
 8 }
 9 //验证签名
10 function checkSign($data, $sign) {
11     $pem =  'my_rsa_public_key.pem';
12     $publicKey = openssl_get_publickey(file_get_contents($pem));
13     $result = openssl_verify($data, $sign, $publicKey);
14     openssl_free_key($publicKey);
15     return $result;
16 }
17 $signData = 'php-rsa';
18 $getSign = getSign($data);
 . 19  $ checkSign = checkSign ( $ Data , base64_decode ( $ Sign )); 
20 is  echo 'signature data:'. $ SignData ;
 21 is  echo 'obtained signature:'. $ GetSign ;
 22 is  echo 'verify the signature:'. $ CheckSign ; 

results are as follows: 
signature data: php-rsa 
signature result: LOVAjWTgHeUvJIK0scVOQO2VlId + 1qEuUc70cb7Z / dyMONpheldefkKJXZDF9HelTz / UnwEd00Tre698VGN1IX / sV7WTQJFCY + ypArfNx9mCzaEhMt0U60yGkIPh8wXqNG10YhgzPIw3Lvd / 36FnRlTBXOZeJMbxFxhdJmSdeOQ = 
verify the signature: 1

[] Data encryption and decryption

 1 //加密数据
 2 function sslEncrypt($source, $type, $key) {
 3     $maxlength = 117;
 4     $output = '';
 5     while ($source) {
 6         $input = substr($source, 0, $maxlength);
 7         $source = substr($source, $maxlength);
 8         if ($type == 'private') {
 9             $ok = openssl_private_encrypt($input, $encrypted, $key);
10         } else {
11             $ok = openssl_public_encrypt($input, $encrypted, $key);
12         }
13         $output .= $encrypted;
14     }
15     return $output;
16 }
17 //解密数据
18 function sslDecrypt($source, $type, $key) {
19     $maxlength = 128;
20     $output = '';
21     while ($source) {
22         $input = substr($source, 0, $maxlength);
23         $source = substr($source, $maxlength);
24         if ($type == 'private') {
25             $ok = openssl_private_decrypt($input, $out, $key);
26         } else {
27             $ok = openssl_public_decrypt($input, $out, $key);
28         }
29         $output .= $out;
30     }
31     return $output;
32 }
33 $data = 'php-rsa';
34 $privatekey = openssl_get_privatekey(file_get_contents('my_rsa_private_key.pem'));
35 $publickey = openssl_get_publickey(file_get_contents( 'my_rsa_public_key.pem' ));
 36  $ Sign = the base64_encode (sslEncrypt ( $ Data , 'Private', $ PrivateKey ));
 37 [  $ Jiemi = sslDecrypt ( base64_decode ( $ Sign ), 'public', $ the publickey ); 
38 is echo 'encrypted data:' $ data;. 
39 echo 'encryption results:'. $ Sign; 
40 echo 'decrypting data:' $ jiemi;. 

results are as follows: 
the encrypted data: php-rsa 
encryption result: aMCpl34vXbofR7a3OPPLElQg6jwG + xbdIsdfYGeVPtIhVp0INMu / 0p9M8h + JiBBmGL / WVY9ynbrvNH6QtLXDoW23rm6EWPPKn53EIqt / 9jM / fDX8EyaAvhIuaSJ2Q7dxz4hNF + Ykm0XZ5ytsCB71zYVPYfaHyo3Xk + VkZ / JvznE = 
decrypting data: php-rsa