28 Nov
2024
28 Nov
'24
2:12 p.m.
Hello,
To clarify, I am consistently using the base64t transformation for both cases.
In kamailio.cfg, I use the transformation `$(var(encoded_json){s.decode.base64t})`, which
correctly decodes the Base64 string.
In Lua, I am passing the same transformation to
`KSR.pv.get("$(var(encoded_json){s.decode.base64t})")`, but the output appears
corrupted when logged using KSR.xlog.xinfo.
There is no mix between base64 and base64t in my tests.
What I forgot to mention in my previous question is that I am using Kamailio version 5.7.6
(x86_64/linux).
Please let me know if you need additional information.
Kind regards,
Dbrcm
-----Original Message-----
From: Daniel-Constantin Mierla <miconda(a)gmail.com>
Sent: Thursday, November 28, 2024 12:21
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc: Dirk Brouwers | CM.com <Dirk.Brouwers(a)cm.com>
Subject: Re: [SR-Users] Potential Bug in Kamailio: Base64 Decode Transformation Not
Working in Lua but Works in kamailio.cfg
[EXTERNAL EMAIL]
Hello,
I see you mention both base64 and base64t, while they are very similar, there are some
differences in charsets and if encoded with one might not be properly decoded with the
other. Is it only one used or it is a mix what you try?
Cheers,
Daniel
On 28.11.24 11:32, Dirk Brouwers | CM.com via sr-users wrote:
Dear Kamailio Developers,
I am writing to report a potential bug in Kamailio's handling of base64 decoding when
using the Lua scripting interface (app_lua).
It appears that base64 decoding behaves inconsistently between Lua scripts and
kamailio.cfg.
When using `$(var(encoded_json){s.decode.base64t})` in kamailio.cfg, where
$var(encoded_json) contains the encoded base64 string: `eyJmb28iOiJiYXIifQ` it decodes to
the correct `{"foo":"bar"}`.
But when using the same transformation in Lua `KSR.xlog.xinfo("Decoded
in Lua: ".. KSR.pv.get("$(var(encoded_json){s.decode.base64t})"))` it
logs a corrupted encoded base64 string: `Decoded in Lua:
..]..#035z{b.?...#036..-....`
Thank you in advance for looking into this issue. Please let me know if you need
additional details or test cases.
Kind regards,
Dbrcm
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