本文介绍了如何从 String 转换为 PublicKey?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
我使用以下代码将公钥和私钥转换为字符串
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());
现在我正在尝试将其转换回公共广告私钥
Now I'm trying to convert it back to public ad private key
PublicKey publicDecoded = Base64.decodeBase64(publicK);
我收到无法从 byte[] 转换为公钥的错误.所以我就这样尝试了
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");
这会导致如下错误
java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: Neither a public nor a private key
看起来我在这里进行了错误的密钥转换.任何帮助将不胜感激.
Looks like I'm doing wrong key conversion here. Any help would be appreciated.
推荐答案
我认为你不能将 SecretKeySpec 与 RSA 一起使用.
I don't think you can use the SecretKeySpec with RSA.
应该这样做:
byte[] publicBytes = Base64.decodeBase64(publicK);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey pubKey = keyFactory.generatePublic(keySpec);
并解码私用PKCS8EncodedKeySpec
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