gistfile1.txt

diff --git a/library/system/authorized_key b/library/system/authorized_key
index 54c9576..af4810d 100644
--- a/library/system/authorized_key
+++ b/library/system/authorized_key
@@ -210,29 +210,36 @@ def parsekey(raw_key):
         'ssh-rsa',
     ]
 
+    options    = None   # connection options
+    key        = None   # encrypted key string
+    key_type   = None   # type of ssh key
+    type_index = None   # index of keytype in key string|list
+
     key_parts = shlex.split(raw_key)
-    if len(key_parts) >= 4 and key_parts[1] in VALID_SSH2_KEY_TYPES:
-        # this line contains options
-        (options,type,key) = key_parts[0:3]
-        comment = " ".join(key_parts[3:])
-    elif len(key_parts) >= 3 and key_parts[0] in VALID_SSH2_KEY_TYPES:
-        # this line is just 'type key user@host'
-        (type,key) = key_parts[0:2]
-        comment = " ".join(key_parts[2:])
-        options = None
-    elif len(key_parts) == 2 and key_parts[0] in VALID_SSH2_KEY_TYPES:
-        # assuming just a type/key with no comment
-        (type,key) = key_parts
-        comment = ""
-        options = None
-    else:
-        # invalid key, maybe a comment?
+    for i in range(0, len(key_parts)):
+        if key_parts[i] in VALID_SSH2_KEY_TYPES:
+            type_index = i
+            key_type = key_parts[i]
+            break
+
+    # check for options
+    if type_index is None:
         return None
-
-    if options:
+    elif type_index == 1:
         # parse the options and store them
-        options = parseoptions(options)
-    return (key, type, options, comment)
+        options = key_parts[0]
+
+    # parse the options (if any)
+    options = parseoptions(options)
+
+    # get key after the type index
+    key = key_parts[(type_index + 1)]
+
+    # set comment to everything after the key
+    if len(key_parts) > (type_index + 1):
+        comment = " ".join(key_parts[(type_index + 2):])
+
+    return (key, key_type, options, comment)
 
 def readkeys(filename):
 
@@ -268,7 +275,7 @@ def writekeys(module, filename, keys):
                         if options[option_key]:
                             option_strings.append("%s=\"%s\"" % (option_key, options[option_key]))
                         else:
-                            option_strings.append("%s " % option_key)
+                            option_strings.append("%s" % option_key)
 
                     option_str = ",".join(option_strings)
                     option_str += " "
@@ -331,8 +338,9 @@ def enforce_state(module, params):
         if state=="present":
             if unique and len(non_matching_keys) > 0:
                 for non_matching_key in non_matching_keys:
-                    del existing_keys[non_matching_key[0]]
-                do_write = True
+                    if non_matching_key[0] in existing_keys:
+                        del existing_keys[non_matching_key[0]]
+                        do_write = True
 
             if not matched:
                 existing_keys[parsed_new_key[0]] = parsed_new_key