Base64 encoding of SASL message not happening

[drboone]

I'm having trouble authenticating to a server because the SASL exchange ends up sending the initial message without base64 encoding the message. Debug log follows. I've redacted the jid string and the hostname of the server.

I've done some basic checking, e.g. I think I have the newest tinyxmpp, tinysasl, base64 modules. Looking through the source, it's not at all clear to me how this is even possible.

Cluestick appreciated!

DEBUG:asyncio:Using selector: KqueueSelector
INFO:tinyxmpp:Connected to server.
DEBUG:tinyxmpp:SEND <?xml version='1.0'?><stream:stream from='redactedusername@redactedhost' to='redactedhost' version='1.0' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'>
DEBUG:tinyxmpp:RECEIVED <stream:stream xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" from="redactedhost" id="11a3j2yl85" xml:lang="en" version="1.0"/>
DEBUG:tinyxmpp:RECEIVED <stream:features xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client"><starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"/><mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><mechanism>PLAIN</mechanism><mechanism>SCRAM-SHA-1</mechanism><mechanism>DIGEST-MD5</mechanism></mechanisms><compression xmlns="http://jabber.org/features/compress"><method>zlib</method></compression><ver xmlns="urn:xmpp:features:rosterver"/><c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="https://www.igniterealtime.org/projects/openfire/" ver="zJwRlhv1+z7iJY5RFlHFXD/0/9U="/></stream:features>
INFO:tinyxmpp:Selecting auth mechanism SCRAM-SHA-1
DEBUG:tinyxmpp:SEND <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='SCRAM-SHA-1'>n,,n=redactedusername,r=KwqrkevoYOlAnuek1rgg4X+rP4HEexXcn0lXO9Sv7zE=</auth>
DEBUG:tinyxmpp:SEND <starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>
DEBUG:tinyxmpp:RECEIVED <failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl" xmlns:stream="http://etherx.jabber.org/streams"><incorrect-encoding/></failure>
ERROR:tinyxmpp:Could not authenticate: <failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl" xmlns:stream="http://etherx.jabber.org/streams"><incorrect-encoding/></failure>
DEBUG:tinyxmpp:RECEIVED <proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls" xmlns:stream="http://etherx.jabber.org/streams"/>
DEBUG:tinyxmpp:SEND <?xml version='1.0'?><stream:stream from='redactedusername@redactedhost' to='redactedhost' version='1.0' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'>
DEBUG:tinyxmpp:RECEIVED <stream:stream xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client" from="redactedhost" id="11a3j2yl85" xml:lang="en" version="1.0"/>
DEBUG:tinyxmpp:RECEIVED <stream:features xmlns:stream="http://etherx.jabber.org/streams" xmlns="jabber:client"><mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl"><mechanism>PLAIN</mechanism><mechanism>SCRAM-SHA-1</mechanism><mechanism>DIGEST-MD5</mechanism></mechanisms><compression xmlns="http://jabber.org/features/compress"><method>zlib</method></compression><ver xmlns="urn:xmpp:features:rosterver"/><c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="https://www.igniterealtime.org/projects/openfire/" ver="zJwRlhv1+z7iJY5RFlHFXD/0/9U="/></stream:features>
INFO:tinyxmpp:Selecting auth mechanism SCRAM-SHA-1
DEBUG:tinyxmpp:SEND <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='SCRAM-SHA-1'>n,,n=redactedusername,r=nC1ppg96Ao+knYMYz4ZaM8UwhKJUrC0RpiO1sjgwzTY=</auth>
DEBUG:tinyxmpp:RECEIVED <failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl" xmlns:stream="http://etherx.jabber.org/streams"><incorrect-encoding/></failure>
ERROR:tinyxmpp:Could not authenticate: <failure xmlns="urn:ietf:params:xml:ns:xmpp-sasl" xmlns:stream="http://etherx.jabber.org/streams"><incorrect-encoding/></failure>