从字节数组创建PrivateKey [英] Create PrivateKey from byte array

问题描述

有没有办法从字节数组生成PrivateKey？我得到这个字节数组使用getEncoded（）方法，但现在我必须将其转换回PrivateKey。

Is there a way to generate PrivateKey from byte array? I got this byte array using getEncoded() method, but now I have to convert it back to PrivateKey.

谢谢，
Vuk

Thanks, Vuk

推荐答案

我一直在寻找这个答案，终于找到了。 keyBytes是一个最初用getEncoded（）创建的字节数组。

I was looking for this answer too and finally found it. keyBytes is a byte array originally created with getEncoded().

//add BouncyCastle as a provider if you want
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
//create a keyfactory - use whichever algorithm and provider
KeyFactory kf = KeyFactory.getInstance("DSA", "BC");
//for private keys use PKCS8EncodedKeySpec; for public keys use X509EncodedKeySpec
PKCS8EncodedKeySpec ks = new PKCS8EncodedKeySpec(keyBytes);
PrivateKey pk = kf.generatePrivate(ks);

我从来没有为JavaCard做任何事情，只是从这 post ，看起来你可以使用KeyFactory类。您可能需要下载BouncyCastle库。

I've never done anything for JavaCard but from this post, it looks like you can use the KeyFactory class. You'll probably need to download the BouncyCastle library.

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