问题外包RSA加密和解密 [英] Problems outsourcing RSA encryption and decryption

问题描述

我有RSA加密和解密的问题。我正在开发在Android和想外包的RSA加密和解密。我的源$ C ​​$ C行之有效之前，我想外包出去。

i have a problem with RSA encryption and decryption. I'm developing in android and would like to outsource the RSA encryption and decryption. My source code worked well before i tried to outsource it.

我创建了一个私钥和公钥并将其保存为private.key和public.key。该错误是造成这种方法一个ClassNotFoundException：

I created a private key and public key and saved it as private.key and public.key. The error is a ClassNotFoundException caused by this method:

public Key getPrivateKey(){
  try {
    InputStream fis = activity.getResources().openRawResource(R.raw.private);
    ObjectInputStream ois = new ObjectInputStream(fis);
    Key RSAprivateKey = (Key)ois.readObject();
    return RSAprivateKey;
  }
  catch (FileNotFoundException e) {
    Log.e("FileNotFound","FileNotFound");
    e.printStackTrace();
  } catch (IOException e) {
    Log.e("IOEXception","IOEXception");
    e.printStackTrace();
  } catch (ClassNotFoundException e) {
    Log.e("ClassNotFound","ClassNotFound");
    Log.e("Errro", "Error: "+ e.getMessage());
    Log.e("error", e.toString());
    e.printStackTrace();
  }
  return null;
}

我看了看logcat的和得到这个错误信息：

I looked at the logcat and got this error message:

E/ClassNotFound(1205): ClassNotFound
03-19 13:54:52.176: E/Errro(1205): Error: 
com.android.org.bouncycastle.jce.provider.JCERSAPrivateCrtKey
03-19 13:54:52.176: E/error(1205): java.lang.ClassNotFoundException: 
com.android.org.bouncycastle.jce.provider.JCERSAPrivateCrtKey

我希望你明白我的问题，因为英语不是我的母语。

I hope you understand my problem, because English is not my native language.

编辑：我发现这个问题是不是由外包code引起的。所以我猜这个话题可以被标记为解决。

I found out that the problem is not caused by outsourcing the code. So i guess the topic can be marked as solved.

推荐答案

RSAPublicKey 和 RSAPrivateKey 是接口。当你得到一个键你实际上这个接口的加密提供者收到的实现。这些供应商为不同的Java平台不同（尽管，至少官方的Andr​​oid / Dalvik的甚至不是一个Java平台）。所以，你应该休想系列化工作，除非你的工作在同一个平台上。

RSAPublicKey and RSAPrivateKey are interfaces. When you get a Key you actually receive an implementation by the cryptographic provider of this interface. These providers differ for different Java platforms (although, at least officially, Android/Dalvik isn't even a Java platform). So you should never expect serialization to work unless you are working on the same platform.

然而，有方法可以在Java中的公共和私有密钥序列;在键接口包含 getEn codeD（）方法，返回键的最常见的二进制编码。在 RSAPublicKey 的情况下，这是X5.09执行subjectKeyIdentifier中的PKCS＃1编码。在 RSAPrivateKey 的情况下，这是的内的PKCS＃8编码缠PKCS＃1定义的结构。使用这些可再presented X509En codedKeySpec 和 PKCS8En codedKeySpec 和转换回使用RSA密钥的KeyFactory 。

There are however ways to serialize public and private keys in Java; the Key interface contains the getEncoded() method which returns the most common binary encoding of the key. In the case of RSAPublicKey this is the PKCS#1 encoding within X5.09 SubjectKeyIdentifier. In the case of RSAPrivateKey this is the inner PKCS#8 encoding wrapped around the PKCS#1 defined structure. These can be represented using X509EncodedKeySpec and PKCS8EncodedKeySpec and converted back into keys using an RSA KeyFactory.

请注意私钥的不会的是，如果你调用加密 getEn codeD 。通常情况下，你不希望在运输私钥的所有的，如果你这样做，你真的应该加密。您可以使用 Cipher.wrap 和 Cipher.u​​nwrap 的方法做到这一点。

Note that the private key will not be encrypted if you call getEncoded. Normally you don't want to transport private keys at all, and if you do you should really encrypt them. You can do this using the Cipher.wrap and Cipher.unwrap methods.

这篇关于问题外包RSA加密和解密的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！