From fb2d7bbdddeefd7c519c5a300b2f810fb364884f Mon Sep 17 00:00:00 2001
From: Robey Pointer <robey@lag.net>
Date: Tue, 15 Feb 2005 15:48:47 +0000
Subject: [PATCH] [project @
 Arch-1:robey@lag.net--2003-public%secsh--dev--1.0--patch-146] raise better
 exception on empty key raise a clearer exception when trying to create an
 empty key.

---
 README                  |  1 -
 paramiko/dsskey.py      |  4 +++-
 paramiko/rsakey.py      |  6 ++++--
 tests/test_transport.py | 34 ++++++++++++++++++++++++++++++++++
 4 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/README b/README
index d522dc6..149f0ab 100644
--- a/README
+++ b/README
@@ -221,4 +221,3 @@ v0.9 FEAROW
 
 * ctr forms of ciphers are missing (blowfish-ctr, aes128-ctr, aes256-ctr)
 * server mode needs better documentation
-* the error message from this is confusing as hell:  DSSKey()
diff --git a/paramiko/dsskey.py b/paramiko/dsskey.py
index 09952b9..f1fe5ae 100644
--- a/paramiko/dsskey.py
+++ b/paramiko/dsskey.py
@@ -47,7 +47,9 @@ class DSSKey (PKey):
         if vals is not None:
             self.p, self.q, self.g, self.y = vals
         else:
-            if (msg is None) or (msg.get_string() != 'ssh-dss'):
+            if msg is None:
+                raise SSHException('Key object may not be empty')
+            if msg.get_string() != 'ssh-dss':
                 raise SSHException('Invalid key')
             self.p = msg.get_mpint()
             self.q = msg.get_mpint()
diff --git a/paramiko/rsakey.py b/paramiko/rsakey.py
index e9e7d01..595b29e 100644
--- a/paramiko/rsakey.py
+++ b/paramiko/rsakey.py
@@ -39,7 +39,7 @@ class RSAKey (PKey):
     data.
     """
 
-    def __init__(self, msg=None, data='', filename=None, password=None, vals=None):
+    def __init__(self, msg=None, data=None, filename=None, password=None, vals=None):
         if filename is not None:
             self._from_private_key_file(filename, password)
             return
@@ -48,7 +48,9 @@ class RSAKey (PKey):
         if vals is not None:
             self.e, self.n = vals
         else:
-            if (msg is None) or (msg.get_string() != 'ssh-rsa'):
+            if msg is None:
+                raise SSHException('Key object may not be empty')
+            if msg.get_string() != 'ssh-rsa':
                 raise SSHException('Invalid key')
             self.e = msg.get_mpint()
             self.n = msg.get_mpint()
diff --git a/tests/test_transport.py b/tests/test_transport.py
index 3e51485..71ca140 100644
--- a/tests/test_transport.py
+++ b/tests/test_transport.py
@@ -311,3 +311,37 @@ class TransportTest (unittest.TestCase):
         self.assertEquals('communist j. cat\n', f.readline())
         chan.close()
         self.assertEquals('', f.readline())
+
+    def test_9_exit_status(self):
+        """
+        verify that get_exit_status() works.
+        """
+        host_key = RSAKey.from_private_key_file('tests/test_rsa.key')
+        public_host_key = RSAKey(data=str(host_key))
+        self.ts.add_server_key(host_key)
+        event = threading.Event()
+        server = NullServer()
+        self.assert_(not event.isSet())
+        self.ts.start_server(event, server)
+        self.tc.ultra_debug = True
+        self.tc.connect(hostkey=public_host_key)
+        self.tc.auth_password(username='slowdive', password='pygmalion')
+        event.wait(1.0)
+        self.assert_(event.isSet())
+        self.assert_(self.ts.is_active())
+
+        chan = self.tc.open_session()
+        schan = self.ts.accept(1.0)
+        self.assert_(chan.exec_command('yes'))
+        schan.send('Hello there.\n')
+        # trigger an EOF
+        schan.shutdown_read()
+        schan.shutdown_write()
+        schan.send_exit_status(23)
+        schan.close()
+        
+        f = chan.makefile()
+        self.assertEquals('Hello there.\n', f.readline())
+        self.assertEquals('', f.readline())
+        self.assertEquals(23, chan.recv_exit_status())
+        chan.close()