Java 如何从 byte[] 数组中恢复 RSA 公钥？
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How to recover a RSA public key from a byte[] array?
提问by kiewic
I'm wondering if it's possible to recover a RSA public key that I have converted to byte array previously.
我想知道是否有可能恢复我之前转换为字节数组的 RSA 公钥。
byte[] keyBytes = publicKey.getEncoded();
Thanks for the help.
谢谢您的帮助。
采纳答案by Bozho
PublicKey publicKey =
KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(bytes));
For more info see this tutorial
有关更多信息，请参阅本教程
回答by Marko Kotar
For others who want to get private key instead of public key from byte array:
对于想要从字节数组中获取私钥而不是公钥的其他人：
PrivateKey privateKey = KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(privateKeyBytes));
回答by Adrien Louis Combecau
Great answer. Thanks for the link. Just for complete, I found this Converted secret key into bytes, how to convert it back to secrect key?
很好的答案。谢谢你的链接。为了完整起见，我发现这个Converted secret key into bytes，如何将其转换回secrect key？
SecretKey key2 = new SecretKeySpec(data, 0, data.length, "DES");
and just worked very well.
并且工作得很好。
