小编hat*_*hat的帖子

我正在编写一个用于传输文件的小应用程序,或多或少是一种了解更多程序加密基础的方法.我们的想法是生成RSA密钥对,交换公钥,并发送AES iv和密钥以进行进一步解密.我想用接收器RSA公钥加密AES密钥,如下所示:

// encode the SecretKeySpec
private byte[] EncryptSecretKey ()
{
    Cipher cipher = null;
    byte[] key = null;

    try
    {
        cipher = Cipher.getInstance("RSA/ECB/NOPADDING");
        // contact.getPublicKey returns a public key of type Key
        cipher.init(Cipher.ENCRYPT_MODE, contact.getPublicKey() );
        // skey is the SecretKey used to encrypt the AES data
        key = cipher.doFinal(skey.getEncoded());
    }
    catch(Exception e )
    {
        System.out.println ( "exception encoding key: " + e.getMessage() );
        e.printStackTrace();
    }
    return key;
}

然后我将键值写入接收器,并像这样解密:

private SecretKey decryptAESKey(byte[] data )
{
    SecretKey key = null; …