public static void privateKey() throws Exception {
FileReader fr = new FileReader(Constant.privatekey);
BufferedReader brBufferedReader = new BufferedReader(fr);
String result = "";
String line = brBufferedReader.readLine();
while (line != null) {
result += line + "\n";
line = brBufferedReader.readLine();
}
RSAPrivateKey pem = (RSAPrivateKey) PEMDecoder.decode(result.toCharArray(), null);
RSAPrivateKeySpec keySpec = new RSAPrivateKeySpec(pem.getN(), pem.getD());
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
privateKey = keyFactory.generatePrivate(keySpec);
}
public boolean authenticatePublicKey(
String user, char[] PEMPrivateKey, String password, SecureRandom rnd) throws IOException {
try {
initialize(user);
if (methodPossible("publickey") == false)
throw new IOException(
"Authentication method publickey not supported by the server at this stage.");
Object key = PEMDecoder.decode(PEMPrivateKey, password);
if (key instanceof DSAPrivateKey) {
DSAPrivateKey pk = (DSAPrivateKey) key;
byte[] pk_enc = DSASHA1Verify.encodeSSHDSAPublicKey(pk.getPublicKey());
TypesWriter tw = new TypesWriter();
byte[] H = tm.getSessionIdentifier();
tw.writeString(H, 0, H.length);
tw.writeByte(Packets.SSH_MSG_USERAUTH_REQUEST);
tw.writeString(user);
tw.writeString("ssh-connection");
tw.writeString("publickey");
tw.writeBoolean(true);
tw.writeString("ssh-dss");
tw.writeString(pk_enc, 0, pk_enc.length);
byte[] msg = tw.getBytes();
DSASignature ds = DSASHA1Verify.generateSignature(msg, pk, rnd);
byte[] ds_enc = DSASHA1Verify.encodeSSHDSASignature(ds);
PacketUserauthRequestPublicKey ua =
new PacketUserauthRequestPublicKey("ssh-connection", user, "ssh-dss", pk_enc, ds_enc);
tm.sendMessage(ua.getPayload());
} else if (key instanceof RSAPrivateKey) {
RSAPrivateKey pk = (RSAPrivateKey) key;
byte[] pk_enc = RSASHA1Verify.encodeSSHRSAPublicKey(pk.getPublicKey());
TypesWriter tw = new TypesWriter();
{
byte[] H = tm.getSessionIdentifier();
tw.writeString(H, 0, H.length);
tw.writeByte(Packets.SSH_MSG_USERAUTH_REQUEST);
tw.writeString(user);
tw.writeString("ssh-connection");
tw.writeString("publickey");
tw.writeBoolean(true);
tw.writeString("ssh-rsa");
tw.writeString(pk_enc, 0, pk_enc.length);
}
byte[] msg = tw.getBytes();
RSASignature ds = RSASHA1Verify.generateSignature(msg, pk);
byte[] rsa_sig_enc = RSASHA1Verify.encodeSSHRSASignature(ds);
PacketUserauthRequestPublicKey ua =
new PacketUserauthRequestPublicKey(
"ssh-connection", user, "ssh-rsa", pk_enc, rsa_sig_enc);
tm.sendMessage(ua.getPayload());
} else {
throw new IOException("Unknown private key type returned by the PEM decoder.");
}
byte[] ar = getNextMessage();
if (ar[0] == Packets.SSH_MSG_USERAUTH_SUCCESS) {
authenticated = true;
tm.removeMessageHandler(this, 0, 255);
return true;
}
if (ar[0] == Packets.SSH_MSG_USERAUTH_FAILURE) {
PacketUserauthFailure puf = new PacketUserauthFailure(ar, 0, ar.length);
remainingMethods = puf.getAuthThatCanContinue();
isPartialSuccess = puf.isPartialSuccess();
return false;
}
throw new IOException("Unexpected SSH message (type " + ar[0] + ")");
} catch (IOException e) {
tm.close(e, false);
throw (IOException) new IOException("Publickey authentication failed.").initCause(e);
}
}
