initial code for scala 2.9.1

Author: Scott R. Parish

LICENSE

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README

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+Backdoor that gives you a scala shell over ssh on your jvm
+
+NOTE: The shell is not sandboxed, anyone access the shell can touch
+anything in the jvm and do anything the jvm can do including modifying
+and deleting files, etc. Use at your own risk. No guarantees are made
+regarding this being secure.
+
+Embed this in your code by running the following:
+
+    val sshd = new ScalaSshShell(port=4444, name="test", user="user",
+                                 passwd="fluke",
+                                 keysResourcePath=Some("/test.ssh.keys"))
+
+Most of that should be self explanatory. The 'name' is the name that
+will be used for the parent thread, as well as the name that will
+appear in the prompt that the user sees. A good idea is to name it
+after the service the jvm is providing so if the user sshes into the
+wrong jvm they'll immediately see a visual indication that they aren't
+where they expected to be.
+
+To shut down ssh service, call:
+
+    sshd.stop()
+
+To generate your keys run ScalaSshShell.generateKeys(), which can be
+done from a scala shell:
+
+    scala> peak6.util.ScalaSshShell.generateKey("src/main/resources/test.ssh.keys")
+
+Note that the shell does not work when running under sbt's console.

project/build.properties

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+#Project properties
+#Thu Sep 01 23:25:18 CDT 2011
+project.organization=PEAK6
+project.name=scala-ssh-shell
+sbt.version=0.7.7
+project.version=0.1
+build.scala.versions=2.9.1
+project.initialize=false

src/main/resources/test.ssh.keys

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+/*
+ * Copyright 2011 PEAK6 Investments, L.P.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package peak6.util
+
+object CrashingThread {
+  def start(name: Option[String] = None,
+            daemon: Boolean = false)(target: => Unit): CrashingThread = {
+    val th = new CrashingThread(name, target)
+    th.setDaemon(daemon)
+    th.start()
+    th
+  }
+}
+
+class CrashingThread(name: Option[String], target: => Unit)
+extends Thread() with com.weiglewilczek.slf4s.Logging {
+  final override def run() {
+    name foreach { setName(_) }
+    try
+      target
+    catch {
+      case e: Exception =>
+	val stack = e.getStackTrace.foldLeft (new StringBuilder()) {
+	  (sb, f) =>
+	    sb.append("  ")
+	    sb.append(f toString)
+            sb += '\n'
+	}.toString
+        logger.error("Unhandled exception:\n" + e.toString + "\n" + stack)
+        System.exit(1)
+    }
+  }
+}

src/main/scala/CrashingThread.scala

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+/* NSC -- new Scala compiler
+ * Copyright 2005-2011 LAMP/EPFL
+ * @author Stepan Koltsov
+ */
+
+package scala.tools.nsc
+package interpreter
+
+import scala.tools.jline.console.ConsoleReader
+import scala.tools.jline.console.completer._
+import session._
+import scala.collection.JavaConverters._
+import Completion._
+import io.Streamable.slurp
+
+/**
+ *  Reads from the console using JLine.
+ */
+class JLineIOReader(in: java.io.InputStream,
+                    out: java.io.OutputStream,
+                    _completion: => Completion) extends InteractiveReader {
+  val interactive = true
+  val consoleReader = new JLineConsoleReader()
+
+  lazy val completion = _completion
+  lazy val history: JLineHistory = JLineHistory()
+  lazy val keyBindings =
+    try KeyBinding parse slurp(term.getDefaultBindings)
+    catch { case _: Exception => Nil }
+
+  private def term = consoleReader.getTerminal()
+  def reset() = term.reset()
+  def init()  = term.init()
+
+  def scalaToJline(tc: ScalaCompleter): Completer = new Completer {
+    def complete(_buf: String, cursor: Int, candidates: JList[CharSequence]): Int = {
+      val buf   = if (_buf == null) "" else _buf
+      val Candidates(newCursor, newCandidates) = tc.complete(buf, cursor)
+      newCandidates foreach (candidates add _)
+      newCursor
+    }
+  }
+
+  class JLineConsoleReader
+  extends ConsoleReader(in, out, null, null)
+  with ConsoleReaderHelper {
+    // working around protected/trait/java insufficiencies.
+    def goBack(num: Int): Unit = back(num)
+    def readOneKey(prompt: String) = {
+      this.print(prompt)
+      this.flush()
+      this.readVirtualKey()
+    }
+    def eraseLine() = consoleReader.resetPromptLine("", "", 0)
+    def redrawLineAndFlush(): Unit = { flush() ; drawLine() ; flush() }
+    // override def readLine(prompt: String): String
+
+    // A hook for running code after the repl is done initializing.
+    //lazy val postInit: Unit = {
+      this setBellEnabled false
+      if (history ne NoHistory)
+        this setHistory history
+
+      if (completion ne NoCompletion) {
+        val argCompletor: ArgumentCompleter =
+          new ArgumentCompleter(new JLineDelimiter, scalaToJline(completion.completer()))
+        argCompletor setStrict false
+
+        this addCompleter argCompletor
+        this setAutoprintThreshold 400 // max completion candidates without warning
+      }
+    //}
+  }
+
+  def currentLine = consoleReader.getCursorBuffer.buffer.toString
+  def redrawLine() = consoleReader.redrawLineAndFlush()
+  def eraseLine() = consoleReader.eraseLine()
+  // Alternate implementation, not sure if/when I need this.
+  // def eraseLine() = while (consoleReader.delete()) { }
+  def readOneLine(prompt: String) = consoleReader readLine prompt
+  def readOneKey(prompt: String)  = consoleReader readOneKey prompt
+}
+
+object JLineIOReader {
+  def apply(intp: IMain,
+            in: java.io.InputStream,
+            out: java.io.OutputStream): JLineIOReader =
+              apply(new JLineCompletion(intp), in, out)
+  def apply(comp: Completion,
+            in: java.io.InputStream,
+            out: java.io.OutputStream): JLineIOReader =
+              new JLineIOReader(in, out, comp)
+}