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标题: 使用openssl实现rsa非对称加密算法示例 [打印本页]

作者: wx_pylelnL4 时间: 2018-2-14 06:00

         [U]复制代码[/U] 代码如下:
_keyPath = $path;
      }
      /**
      * create the key pair,save the key to $this->_keyPath
      */
      public function createKey()
      {
            $r = openssl_pkey_new();
            openssl_pkey_export($r, $privKey);
            file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key', $privKey);
            $this->_privKey = openssl_pkey_get_public($privKey);
            $rp = openssl_pkey_get_details($r);
            $pubKey = $rp['key'];
            file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR .  'pub.key', $pubKey);
            $this->_pubKey = openssl_pkey_get_public($pubKey);
      }
      /**
      * setup the private key
      */
      public function setupPrivKey()
      {
            if(is_resource($this->_privKey)){
                     return true;
            }
            $file = $this->_keyPath . DIRECTORY_SEPARATOR . 'priv.key';
            $prk = file_get_contents($file);
            $this->_privKey = openssl_pkey_get_private($prk);
            return true;
      }
      /**
      * setup the public key
      */
      public function setupPubKey()
      {
            if(is_resource($this->_pubKey)){
                     return true;
            }
            $file = $this->_keyPath . DIRECTORY_SEPARATOR .  'pub.key';
            $puk = file_get_contents($file);
            $this->_pubKey = openssl_pkey_get_public($puk);
            return true;
      }
      /**
      * encrypt with the private key
      */
      public function privEncrypt($data)
      {
            if(!is_string($data)){
                     return null;
            }
            $this->setupPrivKey();
            $r = openssl_private_encrypt($data, $encrypted, $this->_privKey);
            if($r){
                     return base64_encode($encrypted);
            }
            return null;
      }
      /**
      * decrypt with the private key
      */
      public function privDecrypt($encrypted)
      {
            if(!is_string($encrypted)){
                     return null;
            }
            $this->setupPrivKey();
            $encrypted = base64_decode($encrypted);
            $r = openssl_private_decrypt($encrypted, $decrypted, $this->_privKey);
            if($r){
                     return $decrypted;
            }
            return null;
      }
      /**
      * encrypt with public key
      */
      public function pubEncrypt($data)
      {
            if(!is_string($data)){
                     return null;
            }
            $this->setupPubKey();
            $r = openssl_public_encrypt($data, $encrypted, $this->_pubKey);
            if($r){
                     return base64_encode($encrypted);
            }
            return null;
      }
      /**
      * decrypt with the public key
      */
      public function pubDecrypt($crypted)
      {
            if(!is_string($crypted)){
                     return null;
            }
            $this->setupPubKey();
            $crypted = base64_decode($crypted);
            $r = openssl_public_decrypt($crypted, $decrypted, $this->_pubKey);
            if($r){
                     return $decrypted;
            }
            return null;
      }
      public function __destruct()
      {
            @ fclose($this->_privKey);
            @ fclose($this->_pubKey);
      }
}
//以下是一个简单的测试demo，如果不需要请删除
$rsa = new Rsa('ssl-key');
//私钥加密，公钥解密
echo 'source：我是老鳖
';
$pre = $rsa->privEncrypt('我是老鳖');
echo 'private encrypted:
' . $pre . '
';
$pud = $rsa->pubDecrypt($pre);
echo 'public decrypted:' . $pud . '
';
//公钥加密，私钥解密
echo 'source:干IT的
';
$pue = $rsa->pubEncrypt('干IT的');
echo 'public encrypt:
' . $pue . '
';
$prd = $rsa->privDecrypt($pue);
echo 'private decrypt:' . $prd;
?>
需要注意的是apache要支持OpenSSL


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