Rsa 加密

这是一个原生类，其实现在框架都有自带的插件了。
大家可以根据框架，去搜索框架带的composer插件类库。

class Rsa
{
    private $_config = [
        'public_key' => '',
        'private_key' => '',
    ];

    public function __construct($private_key_filepath, $public_key_filepath) {
        $this->_config['private_key'] = $this->_getContents($private_key_filepath);
        $this->_config['public_key'] = $this->_getContents($public_key_filepath);
    }

    /**
     * @uses 获取文件内容
     * @param $file_path string
     * @return bool|string
     */
    private function _getContents($file_path) {
        file_exists($file_path) or die ('密钥或公钥的文件路径错误');
        return file_get_contents($file_path);
    }

    /**     
     * @uses 获取私钥
     * @return bool|resource     
     */ 
    private function _getPrivateKey() {
       $priv_key = $this->_config['private_key'];
       return openssl_pkey_get_private($priv_key);
    }

    /**     
     * @uses 获取公钥
     * @return bool|resource     
     */    
    private function _getPublicKey() {        
        $public_key = $this->_config['public_key'];
        return openssl_pkey_get_public($public_key);
    }

    /**     
     * @uses 私钥加密
     * @param string $data     
     * @return null|string     
     */    
    public function privEncrypt($data = '') {        
        if (!is_string($data)) {
            return null;       
        }
        return openssl_private_encrypt($data, $encrypted, $this->_getPrivateKey()) ? base64_encode($encrypted) : null;
    }

    /**     
     * @uses 公钥加密     
     * @param string $data     
     * @return null|string     
     */    
    public function publicEncrypt($data = '') {        
        if (!is_string($data)) {
            return null;        
        }        
        return openssl_public_encrypt($data, $encrypted, $this->_getPublicKey()) ? base64_encode($encrypted) : null;
    }

    /**     
     * @uses 私钥解密     
     * @param string $encrypted     
     * @return null     
     */    
    public function privDecrypt($encrypted = '') {        
        if (!is_string($encrypted)) {
            return null;        
        }
        return (openssl_private_decrypt(base64_decode($encrypted), $decrypted, $this->_getPrivateKey())) ? $decrypted : null;
    }    

    /**     
     * @uses 公钥解密     
     * @param string $encrypted     
     * @return null     
     */    
    public function publicDecrypt($encrypted = '') {        
        if (!is_string($encrypted)) {
            return null;        
        }        
           return (openssl_public_decrypt(base64_decode($encrypted), $decrypted, $this->_getPublicKey())) ? $decrypted : null;
    }
}


调用rsa类
$private_key = 'private_key.pem'; // 私钥路径
$public_key = 'rsa_public_key.pem'; // 公钥路径
$rsa = new Rsa($private_key, $public_key);

$origin_data = '这是一条测试数据';

$ecryption_data = $rsa->privEncrypt($origin_data);

$decryption_data = $rsa->publicDecrypt($ecryption_data);

echo '私钥加密后的数据为：' . $ecryption_data;
echo PHP_EOL;
echo '公钥解密后的数据为: ' . $decryption_data;
echo PHP_EOL;