1 files changed, 187 insertions, 0 deletions
diff --git a/demos/demo.py b/demos/demo.py
new file mode 100755
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+++ b/demos/demo.py
@@ -0,0 +1,187 @@
+#!/usr/bin/env python
+
+# Copyright (C) 2003-2007  Robey Pointer <robeypointer@gmail.com>
+#
+# This file is part of paramiko.
+#
+# Paramiko is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# Paramiko is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+
+
+import base64
+from binascii import hexlify
+import getpass
+import os
+import select
+import socket
+import sys
+import time
+import traceback
+from paramiko.py3compat import input
+
+import paramiko
+
+try:
+    import interactive
+except ImportError:
+    from . import interactive
+
+
+def agent_auth(transport, username):
+    """
+    Attempt to authenticate to the given transport using any of the private
+    keys available from an SSH agent.
+    """
+
+    agent = paramiko.Agent()
+    agent_keys = agent.get_keys()
+    if len(agent_keys) == 0:
+        return
+
+    for key in agent_keys:
+        print("Trying ssh-agent key %s" % hexlify(key.get_fingerprint()))
+        try:
+            transport.auth_publickey(username, key)
+            print("... success!")
+            return
+        except paramiko.SSHException:
+            print("... nope.")
+
+
+def manual_auth(username, hostname):
+    default_auth = "p"
+    auth = input(
+        "Auth by (p)assword, (r)sa key, or (d)ss key? [%s] " % default_auth
+    )
+    if len(auth) == 0:
+        auth = default_auth
+
+    if auth == "r":
+        default_path = os.path.join(os.environ["HOME"], ".ssh", "id_rsa")
+        path = input("RSA key [%s]: " % default_path)
+        if len(path) == 0:
+            path = default_path
+        try:
+            key = paramiko.RSAKey.from_private_key_file(path)
+        except paramiko.PasswordRequiredException:
+            password = getpass.getpass("RSA key password: ")
+            key = paramiko.RSAKey.from_private_key_file(path, password)
+        t.auth_publickey(username, key)
+    elif auth == "d":
+        default_path = os.path.join(os.environ["HOME"], ".ssh", "id_dsa")
+        path = input("DSS key [%s]: " % default_path)
+        if len(path) == 0:
+            path = default_path
+        try:
+            key = paramiko.DSSKey.from_private_key_file(path)
+        except paramiko.PasswordRequiredException:
+            password = getpass.getpass("DSS key password: ")
+            key = paramiko.DSSKey.from_private_key_file(path, password)
+        t.auth_publickey(username, key)
+    else:
+        pw = getpass.getpass("Password for %s@%s: " % (username, hostname))
+        t.auth_password(username, pw)
+
+
+# setup logging
+paramiko.util.log_to_file("demo.log")
+
+username = ""
+if len(sys.argv) > 1:
+    hostname = sys.argv[1]
+    if hostname.find("@") >= 0:
+        username, hostname = hostname.split("@")
+else:
+    hostname = input("Hostname: ")
+if len(hostname) == 0:
+    print("*** Hostname required.")
+    sys.exit(1)
+port = 22
+if hostname.find(":") >= 0:
+    hostname, portstr = hostname.split(":")
+    port = int(portstr)
+
+# now connect
+try:
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.connect((hostname, port))
+except Exception as e:
+    print("*** Connect failed: " + str(e))
+    traceback.print_exc()
+    sys.exit(1)
+
+try:
+    t = paramiko.Transport(sock)
+    try:
+        t.start_client()
+    except paramiko.SSHException:
+        print("*** SSH negotiation failed.")
+        sys.exit(1)
+
+    try:
+        keys = paramiko.util.load_host_keys(
+            os.path.expanduser("~/.ssh/known_hosts")
+        )
+    except IOError:
+        try:
+            keys = paramiko.util.load_host_keys(
+                os.path.expanduser("~/ssh/known_hosts")
+            )
+        except IOError:
+            print("*** Unable to open host keys file")
+            keys = {}
+
+    # check server's host key -- this is important.
+    key = t.get_remote_server_key()
+    if hostname not in keys:
+        print("*** WARNING: Unknown host key!")
+    elif key.get_name() not in keys[hostname]:
+        print("*** WARNING: Unknown host key!")
+    elif keys[hostname][key.get_name()] != key:
+        print("*** WARNING: Host key has changed!!!")
+        sys.exit(1)
+    else:
+        print("*** Host key OK.")
+
+    # get username
+    if username == "":
+        default_username = getpass.getuser()
+        username = input("Username [%s]: " % default_username)
+        if len(username) == 0:
+            username = default_username
+
+    agent_auth(t, username)
+    if not t.is_authenticated():
+        manual_auth(username, hostname)
+    if not t.is_authenticated():
+        print("*** Authentication failed. :(")
+        t.close()
+        sys.exit(1)
+
+    chan = t.open_session()
+    chan.get_pty()
+    chan.invoke_shell()
+    print("*** Here we go!\n")
+    interactive.interactive_shell(chan)
+    chan.close()
+    t.close()
+
+except Exception as e:
+    print("*** Caught exception: " + str(e.__class__) + ": " + str(e))
+    traceback.print_exc()
+    try:
+        t.close()
+    except:
+        pass
+    sys.exit(1)