Good to know that sngrep is truncating long headers when it displays
them. Maybe it should be reported.
What I noticed with sngrep is that sometimes it does not display the
traffic in the pcap file while ngrep shows the packets. I didn't get the
time yet to dig in further and report back to the project -- mentioning
it here, might be useful for other to know about.
Cheers,
Daniel
On 02.07.21 00:11, Daniel W. Graham wrote:
Confirmed it was due to the sngrep copy. Thanks for mentioning it!
-dan
*From: *sr-users <sr-users-bounces(a)lists.kamailio.org> on behalf of
Ben Kaufman <bkaufman(a)nexvortex.com>
*Reply-To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org>
*Date: *Thursday, July 1, 2021 at 12:49 PM
*To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org>
*Subject: *Re: [SR-Users] SECSIPID Identity Decode
Dump the header to your log file, and copy it from there. I don’t
know what happens with the ncurses in sngrep, but I finally looked
them side by side and …. “Hey! This one’s missing bytes!”
*Ben Kaufman*
/Sr. VoIP Engineer/
P:
E: bkaufman(a)nexvortex.com <mailto:bkaufman@nexvortex.com>
24 hour client support: 855.639.6300 <tel:+18556396300>
*From:* sr-users <sr-users-bounces(a)lists.kamailio.org> *On Behalf Of
*Daniel W. Graham
*Sent:* Thursday, July 1, 2021 10:25 AM
*To:* Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
*Subject:* Re: [SR-Users] SECSIPID Identity Decode
Haha, yep :) I wondered if that was biting me.
-dan
On Jul 1, 2021, at 11:07 AM, Ben Kaufman <bkaufman(a)nexvortex.com
<mailto:bkaufman@nexvortex.com>> wrote:
I observed a similar behavior, but it was the result of my cutting
and pasting the identity header from sngrep, which looks to have
dropped a few bytes on the line break. Any chance that’s what
you’re doing, too?
*Ben Kaufman*
/Sr. VoIP Engineer/
P:
E: bkaufman(a)nexvortex.com <mailto:bkaufman@nexvortex.com>
24 hour client support: 855.639.6300 <tel:+18556396300>
*From:* sr-users <sr-users-bounces(a)lists.kamailio.org
<mailto:sr-users-bounces@lists.kamailio.org>> *On Behalf Of
*Daniel W. Graham
*Sent:* Wednesday, June 30, 2021 10:31 PM
*To:* Kamailio (SER) - Users Mailing List
<sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>; David Villasmil
<david.villasmil.work(a)gmail.com
<mailto:david.villasmil.work@gmail.com>>; Daniel-Constantin Mierla
<miconda(a)gmail.com <mailto:miconda@gmail.com>>
*Subject:* Re: [SR-Users] SECSIPID Identity Decode
Here is an example, payload taken from Identity header.
Identity was added with secsipid_add_identity
Payload test:
$var(test) =
"eyJhdHRlc3QiOiJBIiwiZGVzdCI6eyJ0biI6I5ODkyODkyMjgwIl19LCJpYXQiOjE2MjUxMDk2MzQsIm9yaWciOnsidG4iOiI5ODk0MDA0MjMwIn0sIm9yaWdpZCI6IjNmYmE4NTg0LTRkNzMtNGU2NC04NDc5LTQ5MjU2ZGIyMWFhYSJ9";
xlogl("L_WARN", "$(var(test){s.decode.base64t})\n");
Result is:
{"attest":"A","dest":{"tn":#���#��##�#002%���&�#027B#�#023c#S#023#003�#023sB�&�&�r#��'F�#�#���C#003#003C#3#002'��&�&�v�B#�Vc�s#006f"�&6#026#022�CVCB�#023c3#022�3#0066#�#026#6#026S�r'
-dan
*From: *sr-users <sr-users-bounces(a)lists.kamailio.org
<mailto:sr-users-bounces@lists.kamailio.org>> on behalf of Daniel
Graham <dan(a)cmsinter.net <mailto:dan@cmsinter.net>>
*Reply-To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org>>
*Date: *Wednesday, June 30, 2021 at 5:32 PM
*To: *David Villasmil <david.villasmil.work(a)gmail.com
<mailto:david.villasmil.work@gmail.com>>, "miconda(a)gmail.com
<mailto:miconda@gmail.com>" <miconda(a)gmail.com
<mailto:miconda@gmail.com>>, "Kamailio (SER) - Users Mailing
List"
<sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org>>
*Subject: *Re: [SR-Users] SECSIPID Identity Decode
That’s the same way I am doing it, I was just trying to do a
verification that the identity header/payload was correct before
activating new changes.
I will do further testing and share results. Just found it odd
that the header would decode but payload wouldn’t.
Daniel W. Graham, CTO
CMSInter.net LLC
DIRECT (989) 400-4230
INTERNET | TELEPHONE | MANAGED IT
*From: *David Villasmil <david.villasmil.work(a)gmail.com
<mailto:david.villasmil.work@gmail.com>>
*Date: *Wednesday, June 30, 2021 at 4:06 PM
*To: *"miconda(a)gmail.com <mailto:miconda@gmail.com>"
<miconda(a)gmail.com <mailto:miconda@gmail.com>>, "Kamailio (SER) -
Users Mailing List" <sr-users(a)lists.kamailio.org
<mailto:sr-users@lists.kamailio.org>>
*Cc: *Daniel Graham <dan(a)cmsinter.net <mailto:dan@cmsinter.net>>
*Subject: *Re: [SR-Users] SECSIPID Identity Decode
I DO IT WITH:
# Break JWT
$var(jwt1) =
$(hdr(Identity){s.select,0,.}{s.decode.base64t});
$var(jwt2) =
$(hdr(Identity){s.select,1,.}{s.decode.base64t});
Regards,
David Villasmil
email: david.villasmil.work(a)gmail.com
<mailto:david.villasmil.work@gmail.com>
phone: +34669448337
On Wed, Jun 30, 2021 at 8:48 PM Daniel-Constantin Mierla
<miconda(a)gmail.com <mailto:miconda@gmail.com>> wrote:
Hello,
not familiar with python functions, have you tried with
Kamailio transformation?
https://www.kamailio.org/wiki/cookbooks/5.5.x/transformations#sdecodebase64…
<https://www.kamailio.org/wiki/cookbooks/5.5.x/transformations#sdecodebase64url>
Maybe you have to specify in Python that it is ASCII, I
remember I had to do decoding when porting kamcli to work with
Python3 -- had to change from using directly the variables
received as parameter to a decoded value, something like:
prefix = tprefix.encode("ascii", "ignore").decode()
Also, if you can, share the identity header here to test with
and see if can be reproduced.
Cheers,
Daniel
On 30.06.21 21:14, Daniel W. Graham wrote:
I am unable to base64url decode the json payload in
identity header generated by secsipid.
(Using python for test)
decoded_payload = url64.decode(‘payload’)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xc2
in position 27: invalid continuation byte
Header decodes fine this way but not payload.
Is this an issue with the payload encoding?
Kamailio 5.5
Daniel W. Graham, CTO
CMSInter.net LLC
DIRECT (989) 400-4230
INTERNET | TELEPHONE | MANAGED IT
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