Java如何使用私钥文件而不是PEM来解密？ [英] Java how to use private key file instead of PEM to decrypt?

问题描述

使用Java和Bouncy Castle 1.52，我可以使用以下代码通过PEM证书加载私钥。我也有一个相同的PKCS8格式的private.key文件。什么是直接使用private.key文件而不是PEM的代码？

Using Java and Bouncy Castle 1.52, I can load the private key through the PEM certificate using the following code. I also have a private.key file of the same in PKCS8 format. What is the code to use the private.key file directly instead of the PEM?

String keyPath = "C:\\RSA7\\privatenopass.pem";
BufferedReader br = new BufferedReader(new FileReader(keyPath));
PEMParser pp = new PEMParser(br);
PEMKeyPair pemKeyPair = (PEMKeyPair) pp.readObject();
KeyPair kp = new JcaPEMKeyConverter().getKeyPair(pemKeyPair);
pp.close();
cipher.init(Cipher.DECRYPT_MODE, kp.getPrivate());

推荐答案

已解决。下面为我​​工作。

Resolved. The following worked for me.

File mypkfile = new File("C:\\myfolder\\private.key");
byte[] myPK = fullyReadFile(mypkfile);
PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(myPK);
KeyFactory kf = KeyFactory.getInstance("RSA");
PrivateKey privKey = kf.generatePrivate(privateKeySpec);
cipher.init(Cipher.DECRYPT_MODE, privKey);

fullReadFIle方法：

The fullyReadFIle method:

public static byte[] fullyReadFile(File file) throws IOException
{
            DataInputStream dis = new DataInputStream(new FileInputStream(file));
            byte[] bytesOfFile = new byte[(int) file.length()];
            dis.readFully(bytesOfFile);
            dis.close();
            return bytesOfFile;
}

这篇关于Java如何使用私钥文件而不是PEM来解密？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！