JRuby + Apache MINA SSHD

jruby_mina_sshd_example.rb

# First, download a binary distribution from
# http://mina.apache.org/sshd/sshd-070.html
# and copy lib/*.jar to your cwd

# Load all the jar files
require 'java'
Dir['./*.jar'].each {|jar| require jar }

# Import some Java classes
java_import java.util.EnumSet
java_import org.apache.sshd.SshServer
java_import org.apache.sshd.common.compression.CompressionZlib
java_import org.apache.sshd.server.PasswordAuthenticator
java_import org.apache.sshd.server.PublickeyAuthenticator
java_import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider
java_import org.apache.sshd.server.shell.ProcessShellFactory

PORT = 5000

class CustomPasswordAuthenticator
    include PasswordAuthenticator

    def authenticate(username, password, session)
        # Your password authentication magic here
        # Return true for auth success and false for failure
        true
    end

end

class CustomPublickeyAuthenticator
    include PublickeyAuthenticator

    def authenticate(username, key, session)
        # Your public key authentication magic here
        # Return true for auth success and false for failure
        true
    end

end

# Set up the server with sensible defaults for ciphers, etc.
sshd = SshServer.setUpDefaultServer

# Set the port
sshd.setPort(PORT)

# Create a new host key or read an existing one
sshd.setKeyPairProvider(SimpleGeneratorHostKeyProvider.new('key.ser'))

# Enable zlib compression (optional, omit to reduce CPU usage)
sshd.setCompressionFactories([CompressionZlib::Factory.new])

# Install your custom authenticator(s)
sshd.setPasswordAuthenticator(CustomPasswordAuthenticator.new)
sshd.setPublickeyAuthenticator(CustomPublickeyAuthenticator.new)

# Set the shell to run in each new session
# The user's name will be available in the $USER environment variable
sshd.setShellFactory(
    ProcessShellFactory.new(
        ['/bin/sh', '-i', '-l'].to_java(:string),
        EnumSet.of(
            ProcessShellFactory::TtyOptions::ONlCr,
            ProcessShellFactory::TtyOptions::ICrNl)))

# Start the server
sshd.start