摘要：使用實現非對稱加密私鑰公鑰保存文件地址公鑰私鑰創建公鑰和私鑰生成私鑰生成公鑰設置私鑰從文件中獲取設置公鑰從文件中獲取數據源用私鑰加密

_keyPath = $path;
        }
    }

    /**
     * 創建公鑰和私鑰
     * 
     */
    public function createKey()
    {
        $config = [
            "config" => "D:MinInstallwampwamp64inphpphp5.6.25extrassslopenssl.cnf",
            "digest_alg" => "sha512",
            "private_key_bits" => 4096,
            "private_key_type" => OPENSSL_KEYTYPE_RSA,

        ];
        // 生成私鑰
        $rsa = openssl_pkey_new($config);
        openssl_pkey_export($rsa, $privKey, NULL, $config);
        file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . "priv.key", $privKey);
        $this->_privKey = openssl_pkey_get_public($privKey);
        // 生成公鑰
        $rsaPri = openssl_pkey_get_details($rsa);
        $pubKey = $rsaPri["key"];
        file_put_contents($this->_keyPath . DIRECTORY_SEPARATOR . "pub.key", $pubKey);
        $this->_pubKey = openssl_pkey_get_public($pubKey);
    }

    /** 設置私鑰
     * @return bool
     */
    public function setupPrivKey()
    {
        if (is_resource($this->_privKey)) {
            return true;
        }
        //從文件中獲取
        /*$file = $this->_keyPath . DIRECTORY_SEPARATOR . "priv.key";
        $privKey = file_get_contents($file);*/
        $privKey = $this->_priKeyLink;
        $this->_privKey = openssl_pkey_get_private($privKey);
        return true;
    }

    /** 設置公鑰
     * @return bool
     */
    public function setupPubKey()
    {
        //從文件中獲取
        /*$file = $this->_keyPath . DIRECTORY_SEPARATOR . "pub.key";
        $pubKey = file_get_contents($file);*/
        //數據源
        $pubKey = $this->_pubKeyLink;
        $this->_pubKey = openssl_pkey_get_public($pubKey);
        return true;
    }

    /** 用私鑰加密
     * @param $data
     * @return null|string
     */
    public function privEncrypt($data)
    {
        if (!is_string($data)) {
            return null;
        }
        $this->setupPrivKey();
        $result = openssl_private_encrypt($data, $encrypted, $this->_privKey);
        if ($result) {
            return base64_encode($encrypted);
        }
        return null;
    }

    /** 私鑰解密
     * @param $encrypted
     * @return null
     */
    public function privDecrypt($encrypted)
    {
        if (!is_string($encrypted)) {
            return null;
        }
        $this->setupPrivKey();
        $encrypted = base64_decode($encrypted);
        $result = openssl_private_decrypt($encrypted, $decrypted, $this->_privKey);
        if ($result) {
            return $decrypted;
        }
        return null;
    }

    /** 公鑰加密
     * @param $data
     * @return null|string
     */
    public function pubEncrypt($data)
    {
        if (!is_string($data)) {
            return null;
        }
        $this->setupPubKey();
        $result = openssl_public_encrypt($data, $encrypted, $this->_pubKey);
        if ($result) {
            return base64_encode($encrypted);
        }
        return null;
    }

    /** 公鑰解密
     * @param $crypted
     * @return null
     */
    public function pubDecrypt($crypted)
    {
        if (!is_string($crypted)) {
            return null;
        }
        $this->setupPubKey();
        $crypted = base64_decode($crypted);
        $result = openssl_public_decrypt($crypted, $decrypted, $this->_pubKey);
        if ($result) {
            return $decrypted;
        }
        return null;
    }

    /** 私鑰簽名
     * @param $data
     * @return string
     */
    public function priKeySign($data)
    {
        if(!is_string($data)) return null;
        $private_key=openssl_get_privatekey($this->_priKeyLink);
        $original_str= $data ;//原數據
        openssl_sign($original_str,$sign,$private_key);
        openssl_free_key($private_key);
        $sign=base64_encode($sign);//最終的簽名
        return $sign ;
    }

    /** 公鑰驗簽
     * @param $sign
     * @param $data
     * @return bool
     */
    public  function pubKeyCheck($sign,$data)
    {
        if(!is_string($sign) || !is_string($data)) return null;
        $public_key=openssl_get_publickey($this->_pubKeyLink);
        $sign=base64_decode($sign);//得到的簽名
        $original_str=$data;
        $result=(bool)openssl_verify($original_str,$sign,$public_key);
        openssl_free_key($public_key);
        return $result ;
    }

    /**
     * __destruct
     * 
     */
    public function __destruct() {
        @fclose($this->_privKey);
        @fclose($this->_pubKey);
    }
}
$rsa = new Rsa();

echo "openssl_private_encrypt,openssl_public_decrypt","
";
//私鑰加密，公鑰解密
echo "私鑰加密,公鑰驗簽","
";
echo "待加密數據：testInfo","
";
$pre = $rsa->privEncrypt("testInfo");
echo "加密后的密文:
" . $pre . "
";
$pud = $rsa->pubDecrypt($pre);
echo "解密后數據:" . $pud . "
";
echo "
";


//公鑰加密，私鑰解密
echo "openssl_public_encrypt,openssl_private_decrypt","
";
echo "公鑰加密，私鑰驗簽","
";
echo "待加密數據：ssh-test","
";
$pue = $rsa->pubEncrypt("ssh-test");
echo "加密后的密文:","
" . $pue . "
";
$prd = $rsa->privDecrypt($pue);
echo "解密后數據:" . $prd;

echo "
";echo "
";

echo "openssl_sign,openssl_verify","
";
echo "私鑰簽名,公鑰驗簽","
";
echo "待加密數據：test=32","
";
$pre = $rsa->priKeySign("test=32");
echo "加密后的密文:","
" . $pre . "
";
$pud = $rsa->pubKeyCheck($pre,"test=32");
echo "是否解密成功:" . $pud . "
";
echo "
";