allow whitespace in SSHFP fingerprints

ChangeLog

@@ -1,5 +1,9 @@
 2012-04-07  Bob Halley  <halley@dnspython.org>
 
+	* dns/rdtypes/ANY/SSHFP.py (SSHFP.from_text): Allow whitespace in
+	  the text string.  Thanks to Jan Andres for the report and the
+	  patch.
+
 	* dns/message.py (from_wire): dns.message.from_wire() now takes
 	  an 'ignore_trailing' parameter which defaults to False.  If set
 	  to True, then trailing junk will be ignored instead of causing

dns/rdtypes/ANY/SSHFP.py

@@ -47,9 +47,16 @@ def to_text(self, origin=None, relativize=True, **kw):
     def from_text(cls, rdclass, rdtype, tok, origin = None, relativize = True):
         algorithm = tok.get_uint8()
         fp_type = tok.get_uint8()
-        fingerprint = tok.get_string()
+        chunks = []
+        while 1:
+            t = tok.get().unescape()
+            if t.is_eol_or_eof():
+                break
+            if not t.is_identifier():
+                raise dns.exception.SyntaxError
+            chunks.append(t.value)
+        fingerprint = ''.join(chunks)
         fingerprint = fingerprint.decode('hex_codec')
-        tok.get_eol()
         return cls(rdclass, rdtype, algorithm, fp_type, fingerprint)
 
     from_text = classmethod(from_text)