From 40e99de6ac91f4152a8e36203205f53cacf55a9d Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Sun, 1 Apr 2012 16:33:26 -0400
Subject: [PATCH] Make the code robust against comments and garbage in key
 lines.

---
 ssh-installkeys | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/ssh-installkeys b/ssh-installkeys
index 524fb7a..74c602b 100755
--- a/ssh-installkeys
+++ b/ssh-installkeys
@@ -1961,14 +1961,18 @@ class KeyConfig(ConfigParser.RawConfigParser):
         keydict = {}
         for line in authorized.split("\n"):
             if line:
-                (keytype, content, keyid) = line.strip().split()
-                if keyid not in keydict:
-                    keydict[keyid] = []
-                keydict[keyid].append(keytype)
-        self.remove_section(session.host)
-        self.add_section(session.host)
-        for (keyid, types) in keydict.items():
-            self.set(session.host, keyid, ",".join(types))
+                try:
+                    (keytype, content, keyid) = line.strip().split()
+                    if keyid not in keydict:
+                        keydict[keyid] = []
+                    keydict[keyid].append(keytype)
+                except ValueError:
+                    print "unexpected format in key line ''." % repr(line)
+        if keydict:
+            self.remove_section(session.host)
+            self.add_section(session.host)
+            for (keyid, types) in keydict.items():
+                self.set(session.host, keyid, ",".join(types))
     def forget(self, host):
         self.remove_section(host)
 
-- 
2.43.0