I am building a basic SIP UA. I am sending the following INVITE, as seen in Asterisk console (only headers relevant to authentication are shown):
INVITE sip:104@192.168.1.92 SIP/2.0
From: "110"<sip:110@192.168.1.92>;tag=80859256
To: <sip:104@192.168.1.92>
Call-ID: 80859256
CSeq: 80859256 INVITE
Via: SIP/2.0/UDP 192.168.1.92:6000;branch=z9hG4bK-80859256
Contact: <sip:110@192.168.1.92>
In response, I get the following challenge:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.1.92:6000;branch=z9hG4bK- 80859256;received=127.0.0.1
From: "110"<sip:110@192.168.1.92>;tag=80859256
To: <sip:104@192.168.1.92>;tag=as25af7f49
Call-ID: 80859256
CSeq: 80859256 INVITE
Server: Asterisk PBX 13.7.2
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="20e95772"
Content-Length: 0
I reply with the following:
ACK sip:104@192.168.1.92 SIP/2.0
From: "110"<sip:110@192.168.1.92>;tag=80859256
To: <sip:104@192.168.1.92>;tag=as25af7f49
Call-ID: 80859256
CSeq: 80859256 ACK
Via: SIP/2.0/UDP 192.168.1.92:6000;rport;branch=z9hG4bK-80859256
Contact: <sip:110@192.168.1.92>
Content-Length: 0
INVITE sip:104@192.168.1.92 SIP/2.0
From: "110"<sip:110@192.168.1.92>;tag=80859256
To: <sip:104@192.168.1.92>
Call-ID: 80859256
CSeq: 80859257 INVITE
Via: SIP/2.0/UDP 192.168.1.92:6000;rport;branch=z9hG4bK-80859257
Max-Forwards:5
Allow: REGISTER, INVITE, ACK, BYE, REFER, NOTIFY, CANCEL, INFO, OPTIONS, PRACK, SUBSCRIBE
Contact: <sip:110@192.168.1.92>
Authorization: Digest
username="110",realm="asterisk", nonce="20e95772",uri="sip:104@192.168.1.92",response="ed2de012b2255e85ddb0ee724b9a3ffd"
Session-Expires: 1800
Min-SE: 90
Content-Type: application/sdp
I have not included above the actual SDP sent with the invites. The password for extension 110 is 110 as defined in sip.conf.
QUESTION:
I am getting this error:
WARNING...: chan_sip.c:16702 check_auth: username mismatch, have <110>, digest has <>
NOTICE...: chan_sip.c:25603 handle_request_invite: Failed to authenticate device "110"<sip:110@192.168.1.92>;tag=76981187
This is followed by a “SIP/2.0 403 Forbidden” message.
I do not believe that my digest calculation as sent in the second INVITE is wrong.
What needs to be changed? I have spent a lot of time in debugging this…
Any help would be HIGHLY appreciated.