php RSA公钥私钥加解密和验证用法

现在很多项目中会使用到rsa加解密和验证相关的技术，分别整理代码如下，方便记忆和使用。

【签名和验证】

 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($sign));
20 echo '签名数据：'.$signData;
21 echo '获得签名：'.$getSign;
22 echo '验证签名：'.$checkSign;

运行结果如下：
签名数据：php-rsa
签名结果：LOVAjWTgHeUvJIK0scVOQO2VlId+1qEuUc70cb7Z/dyMONpheldefkKJXZDF9HelTz/UnwEd00Tre698VGN1IX/sV7WTQJFCY+ypArfNx9mCzaEhMt0U60yGkIPh8wXqNG10YhgzPIw3Lvd/36FnRlTBXOZeJMbxFxhdJmSdeOQ=
验证签名：1

【数据加解密】

 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 $sign = base64_encode(sslEncrypt($data, 'private', $privatekey));
37 $jiemi = sslDecrypt(base64_decode($sign), 'public', $publickey);
38 echo '加密数据：'.$data;
39 echo '加密结果：'.$sign;
40 echo '解密数据：'.$jiemi;

运行结果如下：
加密数据：php-rsa
加密结果：aMCpl34vXbofR7a3OPPLElQg6jwG+xbdIsdfYGeVPtIhVp0INMu/0p9M8h+JiBBmGL/WVY9ynbrvNH6QtLXDoW23rm6EWPPKn53EIqt/9jM/fDX8EyaAvhIuaSJ2Q7dxz4hNF+Ykm0XZ5ytsCB71zYVPYfaHyo3Xk+VkZ/JvznE=
解密数据：php-rsa