Using Mina Client API to SFTP using Private Key File

[Chuck Lowery]

Hello,

I am having a lot of trouble trying to figure out how to authenticate with
an SFTP service using only a PEM / Private key.

There doesn't seem to be any examples demonstrating how to make this happen
in mina. Looking at the Javadocs and documentation it isn't clear if it is
supported.

Here is an example of the operation done in SSHTools for a reference of
what I am asking for:

    private static void authenticate(Ssh2Client ssh2, String host, Integer
port, String username, InputStream privateKey) {
        Ssh2PublicKeyAuthentication auth =
createKeyAuthentication(privateKey);

        try {
            int result = ssh2.authenticate(auth);
            if (result != SshAuthentication.COMPLETE) {
                throw new AuthenticationIncomplete(host, port, username,
result);
            }
        } catch (SshException ex) {
            throw new UnableToAuthenticate(host, port, username, ex);
        }
    }

    private static Ssh2PublicKeyAuthentication
createKeyAuthentication(InputStream privateKey) {
        try {
            SshPrivateKeyFile privateKeyFile =
SshPrivateKeyFileFactory.parse(StreamUtil.readIntoByteArray(privateKey));
            SshKeyPair keyPair = privateKeyFile.toKeyPair("");

            Ssh2PublicKeyAuthentication auth = new
Ssh2PublicKeyAuthentication();
            auth.setPrivateKey(keyPair.getPrivateKey());
            auth.setPublicKey(keyPair.getPublicKey());
            return auth;
        } catch (IOException | InvalidPassphraseException ex) {
            throw new ConfigurationIssue(ex);
        }
    }




Charles H. Lowery