問題描述

我使用以下代碼將公鑰和私鑰轉(zhuǎn)換為字符串

I've used the following code to convert the public and private key to a string

KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
keyPairGen.initialize(2048);
KeyPair          keyPair    = keyPairGen.genKeyPair();
PublicKey        publicKey  = keyPair.getPublic();
PrivateKey       privateKey = keyPair.getPrivate();
String publicK = Base64.encodeBase64String(publicKey.getEncoded());
String privateK = Base64.encodeBase64String(privateKey.getEncoded());

現(xiàn)在我正在嘗試將其轉(zhuǎn)換回公共廣告私鑰

Now I'm trying to convert it back to public ad private key

PublicKey publicDecoded = Base64.decodeBase64(publicK);

我收到無法從 byte[] 轉(zhuǎn)換為公鑰的錯(cuò)誤.所以我就這樣嘗試了

I'm getting error of cannot convert from byte[] to public key. So I tried like this

PublicKey publicDecoded = new SecretKeySpec(Base64.decodeBase64(publicK),"RSA");

這會(huì)導(dǎo)致如下錯(cuò)誤

java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: Neither a public nor a private key

看起來我在這里進(jìn)行了錯(cuò)誤的密鑰轉(zhuǎn)換.任何幫助將不勝感激.

Looks like I'm doing wrong key conversion here. Any help would be appreciated.

推薦答案

我認(rèn)為你不能將 SecretKeySpec 與 RSA 一起使用.

I don't think you can use the SecretKeySpec with RSA.

應(yīng)該這樣做:

byte[] publicBytes = Base64.decodeBase64(publicK);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey pubKey = keyFactory.generatePublic(keySpec);

并解碼私用PKCS8EncodedKeySpec

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