Java 如何将公钥转换为OpenSSH授权密钥格式
下面是获取公钥的代码。我需要将公钥转换为OpenSSH格式,以将其添加到Linux中的Java 如何将公钥转换为OpenSSH授权密钥格式,java,bouncycastle,ssh-keys,public-key,authorized-keys,Java,Bouncycastle,Ssh Keys,Public Key,Authorized Keys,下面是获取公钥的代码。我需要将公钥转换为OpenSSH格式,以将其添加到Linux中的authorized\u keys文件中。我该怎么做 KeyPairGenerator kpGen = KeyPairGenerator.getInstance("DSA", "BC"); kpGen.initialize(1024, new SecureRandom()); KeyPair keypair = kpGen.generateKeyPair(); 我确实使用了PEMWriter。但是它没有给出正
authorized\u keys
文件中。我该怎么做
KeyPairGenerator kpGen = KeyPairGenerator.getInstance("DSA", "BC");
kpGen.initialize(1024, new SecureRandom());
KeyPair keypair = kpGen.generateKeyPair();
我确实使用了PEMWriter。但是它没有给出正确格式的输出字符串。对于另一个问题:
如果您想要反向处理,即编码PublicKey
Java对象
对于Linux授权密钥
输入格式,可以使用以下代码:
/**
* Encode PublicKey (DSA or RSA encoded) to authorized_keys like string
*
* @param publicKey DSA or RSA encoded
* @param user username for output authorized_keys like string
* @return authorized_keys like string
* @throws IOException
*/
public static String encodePublicKey(PublicKey publicKey, String user)
throws IOException {
String publicKeyEncoded;
if(publicKey.getAlgorithm().equals("RSA")){
RSAPublicKey rsaPublicKey = (RSAPublicKey) publicKey;
ByteArrayOutputStream byteOs = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(byteOs);
dos.writeInt("ssh-rsa".getBytes().length);
dos.write("ssh-rsa".getBytes());
dos.writeInt(rsaPublicKey.getPublicExponent().toByteArray().length);
dos.write(rsaPublicKey.getPublicExponent().toByteArray());
dos.writeInt(rsaPublicKey.getModulus().toByteArray().length);
dos.write(rsaPublicKey.getModulus().toByteArray());
publicKeyEncoded = new String(
Base64.encodeBase64(byteOs.toByteArray()));
return "ssh-rsa " + publicKeyEncoded + " " + user;
}
else if(publicKey.getAlgorithm().equals("DSA")){
DSAPublicKey dsaPublicKey = (DSAPublicKey) publicKey;
DSAParams dsaParams = dsaPublicKey.getParams();
ByteArrayOutputStream byteOs = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(byteOs);
dos.writeInt("ssh-dss".getBytes().length);
dos.write("ssh-dss".getBytes());
dos.writeInt(dsaParams.getP().toByteArray().length);
dos.write(dsaParams.getP().toByteArray());
dos.writeInt(dsaParams.getQ().toByteArray().length);
dos.write(dsaParams.getQ().toByteArray());
dos.writeInt(dsaParams.getG().toByteArray().length);
dos.write(dsaParams.getG().toByteArray());
dos.writeInt(dsaPublicKey.getY().toByteArray().length);
dos.write(dsaPublicKey.getY().toByteArray());
publicKeyEncoded = new String(
Base64.encodeBase64(byteOs.toByteArray()));
return "ssh-dss " + publicKeyEncoded + " " + user;
}
else{
throw new IllegalArgumentException(
"Unknown public key encoding: " + publicKey.getAlgorithm());
}
}
@gotoalberto的代码仅针对RSA和DSA密钥实现。如果您需要其他密钥,您必须自己添加它们