srtp-development — libsrtp development

[Srtp-development] libSRTP Library error 7 from srtp_unprotect() - authentication failure

[Sagar J. <sj...@fu...>]

Hi All,

 

I need help here. Not able to find a solution for this problem described
below

 

We are testing TLS/SRTP in opal <http://www.opalvoip.org/>  based  Gateway
which is using libSRTP <https://sourceforge.net/projects/srtp/>  for SRTP
implicitly.  We are testing call SIP/TLS + SRTP video call from Polycom HDX
8000 to our Gateway.

 

 

In certain occasions we get continuous decryption errors below 

 

2018/02/01 07:26:12.430 2       RTP-1-media:12062 srtp_session.cxx(722) SRTP
Session 1, Library error 7 from srtp_unprotect() - authentication failure -
SSRC=566990337 (0x21cb9601)

 

Once this error starts it occurs for a while for every call, and then
vanishes after sometime. The behaviour is quite random. 

 

The keys exchanged in the SDP seem fine mentioned below.

 

Polycom's encryption key negotiation 

 

a=crypto:2 AES_CM_128_HMAC_SHA1_80
inline:rf28f1M7avmP25GPWCwHLqzHa+FtriEZlyJHygL9|2^31

 

 

Gateway encryption key during negotiation 

 

a=crypto:2 AES_CM_128_HMAC_SHA1_80
inline:gpwVwPthwquDFhDJVueDCUyMIUC6Oau2ddb5MK9m

 

 


Thanks and Regards

 

Sagar Joshi 

Associate Technical Manager

Connected-Experience Practice

 



 

 

 


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[Srtp-development] Soliciting feedback on new AES-GCM related bug found in libSRTP 1.5.4 & 2.0.0

[Pascal B. (pabuhler) <pab...@ci...>]

Hi,

The following bug was recently reported on github https://github.com/cisco/libsrtp/issues/256, this bug relates to AES-GCM on little-endian system.
Fixing this bug will cause some backward compatibility issues with existing libSRTP version, but not fixing is not really an option due to interop issues with other AES-GCM implementations as well as it being a potential security problem.
Current plan is to fix as part of the upcoming 2.1.0 release and then simultaneously create patch release for 1.5.x.
If this bug affects your usage of libSRTP and you would like to discuss how a fix is released then please reply to this mail at li...@li...<mailto:li...@li...> or else comment directly on the github issue.

pascal

[Srtp-development] libSRTP project has moved, this mailer is retired!

[Pascal B. (pabuhler) <pab...@ci...>]

Hi,

For those that do not know already the libSRTP project has completely moved from https://sourceforge.net/projects/srtp  to https://github.com/cisco/libsrtp .

As part of this move the mailer's hosted on sourceforge , srt...@li...<mailto:srt...@li...> & srt...@li...<mailto:srt...@li...> can no long be maintained and so are retiring.

There is a new libsrtp mailer set up at li...@li...<mailto:li...@li...> for general news / announcements / discussions. This is an open list, to subscribe go to https://lists.packetizer.com/mailman/listinfo/libsrtp .



Bets regards



Pascal, on behalf of libSRTP maintenance team.

Re: [Srtp-development] manual

[carl h <hey...@gm...>]

Sorry to include the developers list on this one. Mustn't be a very busy
mailing list. Have not got any
responses to my first inquiry.

I noticed later that I had to generate reference docs which I tried to do.

I get this error that I can't resolve (not familiar with text generation
tools).

(/usr/share/texlive/texmf-dist/tex/latex/psnfss/ot1pcr.fd)
[1{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map}]
! Undefined control sequence.
l.82 \clearemptydoublepage

libstrp-2.0.0

Appreciate any help.

thanks
/carl h.



On Wed, Jan 11, 2017 at 4:10 PM, carl h <hey...@gm...> wrote:

> Hi,
>
> I'm new to SRTP and getting up to speed.
>
> In the current version (2.0) the reference manual was deleted from the
> release with the reason being that it was out of date. I just read the
> manual and I am wondering which information is incorrect.
>
> Is there somewhere where I can up to date information...or do I have to
> just read the source?
>
> thx
> /c
>

Re: [Srtp-development] jitter statistics from libsrtp

[John F. <fo...@ci...>]

Jitter statistics would come from the RTP layer.  For instance, the DSP
processing the RTP packets would generate the statistics. 


On 09/10/2015 08:33 AM, Priyaranjan Nayak wrote:
> Hi All,
>
> I am using libsrtp-1.5.2 version source code for DTLS-SRTP in my
> project and it is working fine without any issue.Is there any way to
> get the jitter statistics of rtp packets from libsrtp ?
>
>
> Thanks
> Priyaranjan

[Srtp-development] jitter statistics from libsrtp

[Priyaranjan N. <pri...@gm...>]

Hi All,

I am using libsrtp-1.5.2 version source code for DTLS-SRTP in my project
and it is working fine without any issue.Is there any way to get the jitter
statistics of rtp packets from libsrtp ?


Thanks
Priyaranjan

[Srtp-development] Audio quality is not good after 10sec of call

[Priyaranjan N. <pri...@gm...>]

Hi David,

I am using libsrtp-1.5.2 vesion. The ouput audio quality is very bad after
10 second of call duration. I am using crypto-suite AES_CM_128_HMAC_SHA1_80
and there is no packet loss in the network.

Could you please guide me why the audio quality is going bad after 10
second of call ?

Thanks
Priyaranjan

[Srtp-development] un-protect() API of libsrtp-1.5.2 is corrupting some packets

[Priyaranjan N. <pri...@gm...>]

Hi All,

I am using libsrtp-1.5.2 version in our project. I have set the
encrypt/decrypt key properly. I am observing below point

   - The rtp packets are same after protect and before unprotect .But when
   I call un-protect() , 80% packets are unprotect properly. The rest of 20%
   packets are not unprotect properly. In these packets some of the bytes gets
   corrupted during un-protect() API call.

If anyone faced this problem in un-protect() API, Please revert back, what
needs to be done to get correct packets.

Thanks
Priyaranjan

[Srtp-development] DTLS-SRTP Key exchange between two SIP endpoint

[Priyaranjan N. <pri...@gm...>]

Hi All,

I am new to the DTLS-SRTP environment. I have two sip endpoint and wanted
to establish the dtls-srtp for media(RTP) communication.
Could you please explain me How the master key and salt key will be
exchange between two sip endpoint while establishing the media in DTLS-SRTP
?


Thanks
Priyaranjan

[Srtp-development] Need some information regarding dtls-srtp

[Priyaranjan N. <pri...@gm...>]

Hi All,

I have only dtls and srtp supported code. I wanted to use both module for
dtls-srtp.
1. Is it possible to combine both module for dtls-srtp ?
2. if possible , Could you please give me idea how can I approach ?

Thanks
Priyaranjan

Re: [Srtp-development] Difference between DTLS-SRTP and SRTP packet send over DTLS connections

[<ka...@go...>]

With DTLS-SRTP the SRTP parameters are derived from the DTLS handshake
(they are not set up using the signaling protocol, the signaling protocol
usually carries fingerprints of each certificate so a MITM attack can be
detected).

The SRTP packets are then sent over UDP (or whatever transport is being
used, e.g. SRTP over TCP to get through firewalls). They are not
encapsulated in DTLS.

best regards,

KP


On Wed, Jul 15, 2015 at 3:14 PM, John Foley <fo...@ci...> wrote:

>  My knowledge of DTLS-SRTP is fairly limited.  But my understanding is the
> signaling protocol (e.g. SIP) would use DTLS as the transport.  The SRTP
> session parameters are setup via the signaling protocol.  Once those are
> established, SRTP packets are sent directly over UDP (not using DTLS).  But
> you'll probably want to read RFC 5763 to understand the details.
>
>
>
> On 07/15/2015 01:14 AM, Priyaranjan Nayak wrote:
>
> I have two SIP endpoint and wanted to send the media over dtls-srtp. I am
> little bit confuse in below points
>
> 1. Is DTLS-SRTP and SRTP packet send over DTLS connections are same or
> different ?
>
> 2. If different, Could you please explain me how are they different ?
>
> Thanks
> Priyaranjan
>
>
>
>
> ------------------------------------------------------------------------------
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>
>

Re: [Srtp-development] Difference between DTLS-SRTP and SRTP packet send over DTLS connections

[John F. <fo...@ci...>]

My knowledge of DTLS-SRTP is fairly limited.  But my understanding is
the signaling protocol (e.g. SIP) would use DTLS as the transport.  The
SRTP session parameters are setup via the signaling protocol.  Once
those are established, SRTP packets are sent directly over UDP (not
using DTLS).  But you'll probably want to read RFC 5763 to understand
the details.



On 07/15/2015 01:14 AM, Priyaranjan Nayak wrote:
> I have two SIP endpoint and wanted to send the media over dtls-srtp. I
> am little bit confuse in below points
>
> 1. Is DTLS-SRTP and SRTP packet send over DTLS connections are same or
> different ?
>
> 2. If different, Could you please explain me how are they different ?
>
> Thanks
> Priyaranjan

[Srtp-development] Difference between DTLS-SRTP and SRTP packet send over DTLS connections

[Priyaranjan N. <pri...@gm...>]

I have two SIP endpoint and wanted to send the media over dtls-srtp. I am
little bit confuse in below points

1. Is DTLS-SRTP and SRTP packet send over DTLS connections are same or
different ?

2. If different, Could you please explain me how are they different ?

Thanks
Priyaranjan

Re: [Srtp-development] [Srtp-users] How to generate libsrtp.so

[John F. <fo...@ci...>]

Try "make shared_library"


On 07/11/2015 03:30 AM, Priyaranjan Nayak wrote:
> Hi John,
>
> I have tried your command,but I am getting below output for "make
> libsrtp2.so" command
> make: *** No rule to make target `libsrtp2.so'.  Stop.
> I have gone through the Makefile and put command "make
> shared_library". Now I am getting libsrtp.so.1
>
> Is it correct way of generating the shared library for libsrtp-1.5.2 ?
>
> On Fri, Jul 10, 2015 at 7:31 PM, John Foley <fo...@ci...
> <mailto:fo...@ci...>> wrote:
>
>     You should be able to simply do:
>
>     ./configure
>     make clean
>     make libsrtp2.so
>
>
>
>
>     On 07/10/2015 09:50 AM, Priyaranjan Nayak wrote:
>>     Hi All,
>>
>>     I am using libsrtp-1.5.2 version. I wanted to use as a shared
>>     library. I did not get any configuration argument to generate the
>>     shared library.It is generating static library bydefault. Could
>>     you please help me how to generate shared library(libsrtp.so) ?
>>
>>     Thanks
>>     Priyaranjan
>>
>>
>>     ------------------------------------------------------------------------------
>>     Don't Limit Your Business. Reach for the Cloud.
>>     GigeNET's Cloud Solutions provide you with the tools and support that
>>     you need to offload your IT needs and focus on growing your business.
>>     Configured For All Businesses. Start Your Cloud Today.
>>     https://www.gigenetcloud.com/
>>
>>
>>     _______________________________________________
>>     Srtp-users mailing list
>>     Srt...@li... <mailto:Srt...@li...>
>>     https://lists.sourceforge.net/lists/listinfo/srtp-users
>
>
>
>
> -- 
> Thanks
> Priyaranjan

Re: [Srtp-development] [Srtp-users] How to generate libsrtp.so

[Priyaranjan N. <pri...@gm...>]

Hi John,

I have tried your command,but I am getting below output for "make
libsrtp2.so" command
make: *** No rule to make target `libsrtp2.so'.  Stop.
I have gone through the Makefile and put command "make shared_library". Now
I am getting libsrtp.so.1

Is it correct way of generating the shared library for libsrtp-1.5.2 ?

On Fri, Jul 10, 2015 at 7:31 PM, John Foley <fo...@ci...> wrote:

>  You should be able to simply do:
>
> ./configure
> make clean
> make libsrtp2.so
>
>
>
>
> On 07/10/2015 09:50 AM, Priyaranjan Nayak wrote:
>
>  Hi All,
>
>  I am using libsrtp-1.5.2 version. I wanted to use as a shared library. I
> did not get any configuration argument to generate the shared library.It is
> generating static library bydefault. Could you please help me how to
> generate shared library(libsrtp.so) ?
>
> Thanks
> Priyaranjan
>
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.https://www.gigenetcloud.com/
>
>
>
> _______________________________________________
> Srtp-users mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/srtp-users
>
>
>


-- 
Thanks
Priyaranjan

Re: [Srtp-development] [Srtp-users] How to generate libsrtp.so

[John F. <fo...@ci...>]

You should be able to simply do:

./configure
make clean
make libsrtp2.so



On 07/10/2015 09:50 AM, Priyaranjan Nayak wrote:
> Hi All,
>
> I am using libsrtp-1.5.2 version. I wanted to use as a shared library.
> I did not get any configuration argument to generate the shared
> library.It is generating static library bydefault. Could you please
> help me how to generate shared library(libsrtp.so) ?
>
> Thanks
> Priyaranjan
>
>
> ------------------------------------------------------------------------------
> Don't Limit Your Business. Reach for the Cloud.
> GigeNET's Cloud Solutions provide you with the tools and support that
> you need to offload your IT needs and focus on growing your business.
> Configured For All Businesses. Start Your Cloud Today.
> https://www.gigenetcloud.com/
>
>
> _______________________________________________
> Srtp-users mailing list
> Srt...@li...
> https://lists.sourceforge.net/lists/listinfo/srtp-users

[Srtp-development] How to generate libsrtp.so

[Priyaranjan N. <pri...@gm...>]

Hi All,

I am using libsrtp-1.5.2 version. I wanted to use as a shared library. I
did not get any configuration argument to generate the shared library.It is
generating static library bydefault. Could you please help me how to
generate shared library(libsrtp.so) ?

Thanks
Priyaranjan

Re: [Srtp-development] [Srtp-users] memory leak in libsrtp library

[Cullen J. (fluffy) <fl...@ci...>]

you can get the latest at 

https://github.com/cisco/libsrtp


> On Jun 28, 2015, at 8:25 PM, Justin Uberti <ju...@go...> wrote:
> 
> 1.4.2 is ancient. You want to use something newer (1.5.0 or later)
> 
> On Sun, Jun 28, 2015 at 6:35 PM, priyaranjan nayak <pri...@gm...> wrote:
> Hi Justin,
> 
> I am using libsrtp-1.4.2 version of source code. Which version of source code contains srtp_shutdown() function ?
> From: Justin Uberti
> Sent: ‎28-‎06-‎2015 10:55 PM
> To: Priyaranjan Nayak
> Cc: srt...@li...; srt...@li...
> Subject: Re: [Srtp-users] memory leak in libsrtp library
> 
> Call srtp_shutdown()
> 
> On Sun, Jun 28, 2015 at 3:39 AM, Priyaranjan Nayak <pri...@gm...> wrote:
> Hi All,
> 
> The libsrtp is not releasing the memory which is created at the time of srtp_init() function invoke. 
> 
> In srtp_init() function we are invoking below two function 
> 	• crypto_kernel_init();
> 	•  crypto_kernel_load_debug_module(&mod_srtp)
> while exiting from the library I am calling below function.
> 
> crypto_kernel_shutdown(); 
> 
> Now I observed that it is not releasing the list properly.So meory leak is coming.
> Could you please suggest me to resolve this issue ?
> 
> Thanks
> Priyaranjan
> 
> ------------------------------------------------------------------------------
> Monitor 25 network devices or servers for free with OpManager!
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> _______________________________________________
> Srtp-users mailing list
> Srt...@li...
> https://lists.sourceforge.net/lists/listinfo/srtp-users
> 
> 
> 
> ------------------------------------------------------------------------------
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> OpManager is web-based network management software that monitors 
> network devices and physical & virtual servers, alerts via email & sms 
> for fault. Monitor 25 devices for free with no restriction. Download now
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Re: [Srtp-development] [Srtp-users] memory leak in libsrtp library

[priyaranjan n. <pri...@gm...>]

Hi Justin,

I am using libsrtp-1.4.2 version of source code. Which version of source code contains srtp_shutdown() function ?

-----Original Message-----
From: "Justin Uberti" <ju...@go...>
Sent: ‎28-‎06-‎2015 10:55 PM
To: "Priyaranjan Nayak" <pri...@gm...>
Cc: "srt...@li..." <srt...@li...>; "srt...@li..." <srt...@li...>
Subject: Re: [Srtp-users] memory leak in libsrtp library

Call srtp_shutdown()


On Sun, Jun 28, 2015 at 3:39 AM, Priyaranjan Nayak <pri...@gm...> wrote:

Hi All,

The libsrtp is not releasing the memory which is created at the time of srtp_init() function invoke. 


In srtp_init() function we are invoking below two function 

crypto_kernel_init(); crypto_kernel_load_debug_module(&mod_srtp)while exiting from the library I am calling below function.

crypto_kernel_shutdown(); Now I observed that it is not releasing the list properly.So meory leak is coming.Could you please suggest me to resolve this issue ?Thanks
Priyaranjan


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[Srtp-development] memory leak in libsrtp library

[Priyaranjan N. <pri...@gm...>]

Hi All,

The libsrtp is not releasing the memory which is created at the time of
srtp_init() function invoke.

In srtp_init() function we are invoking below two function

   -

   crypto_kernel_init();

   -

    crypto_kernel_load_debug_module(&mod_srtp)


while exiting from the library I am calling below function.

crypto_kernel_shutdown();

Now I observed that it is not releasing the list properly.So meory
leak is coming.

Could you please suggest me to resolve this issue ?

Thanks
Priyaranjan

[Srtp-development] libsrtp EKT support

[John F. <fo...@ci...>]

Is anyone using the EKT API in libsrtp?  We're preparing to modify this
code to bring it into compliance with the latest EKT draft to support
https://tools.ietf.org/html/draft-jones-avtcore-private-media-framework-00. 
Our concern is maintaining backwards compatibility with any existing
deployments of EKT.  If you have a vested interest, please respond to
this email.

Re: [Srtp-development] Access to field 'type' results in a dereference of a null pointer in cipher.c

[Gaurav <gau...@gm...>]

There isn't an exact code path that exposes a null pointer dereference as
of now.
This was only from a good defensive coding viewpoint.


On Tue, Jun 10, 2014 at 6:17 PM, John Foley <fo...@ci...> wrote:

>  Thanks for the suggestion.  This is good defensive coding.  However,
> cipher_encrypt isn't part of the public API.  Have you identified a code
> path that exposes a null pointer dereference?  We've run Coverity on the
> code and I don't recall this being raised as an issue.
>
>
>
> On 06/10/2014 02:42 AM, Gaurav wrote:
>
>  Hi,
>
>  I'd like to file a bug reported by the clang static analyzer.
>
>  Description: Access to field 'type' results in a dereference of a null
> pointer (loaded from variable 'c')
> File: cipher/cipher.c
> Line: 395
>
>  I think macro 'cipher_encrypt' should check if the pointer 'c' exists.
> In case it doesn't exist it should return an appropriate error code such
> as 'err_status_no_such_op'.
>
>
>  I think macro 'cipher_encrypt' should expand to:
>
>  ((c) ? (((c)->type)->encrypt(((c)->state), (enc_buf), (&len))) :
> err_status_no_such_op)
>
>  instead of:
>
>  (((c)->type)->encrypt(((c)->state), (enc_buf), (&len)))
>
>
>  -Gaurav Nangla
>
>
> ------------------------------------------------------------------------------
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>
>
> _______________________________________________
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>
>
>
>
> ------------------------------------------------------------------------------
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>
>

Re: [Srtp-development] Access to field 'type' results in a dereference of a null pointer in cipher.c

[John F. <fo...@ci...>]

Thanks for the suggestion.  This is good defensive coding.  However,
cipher_encrypt isn't part of the public API.  Have you identified a code
path that exposes a null pointer dereference?  We've run Coverity on the
code and I don't recall this being raised as an issue.


On 06/10/2014 02:42 AM, Gaurav wrote:
> Hi,
>
> I'd like to file a bug reported by the clang static analyzer.
>
> Description: Access to field 'type' results in a dereference of a null
> pointer (loaded from variable 'c')
> File: cipher/cipher.c
> Line: 395
>
> I think macro 'cipher_encrypt' should check if the pointer 'c' exists. 
> In case it doesn't exist it should return an appropriate error code
> such as 'err_status_no_such_op'.
>
>
> I think macro 'cipher_encrypt' should expand to:
>
> ((c) ? (((c)->type)->encrypt(((c)->state), (enc_buf), (&len))) :
> err_status_no_such_op)
>
> instead of:
>
> (((c)->type)->encrypt(((c)->state), (enc_buf), (&len)))
>
>
> -Gaurav Nangla
>
>
> ------------------------------------------------------------------------------
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>
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[Srtp-development] Access to field 'type' results in a dereference of a null pointer in cipher.c

[Gaurav <gau...@gm...>]

Hi,

I'd like to file a bug reported by the clang static analyzer.

Description: Access to field 'type' results in a dereference of a null
pointer (loaded from variable 'c')
File: cipher/cipher.c
Line: 395

I think macro 'cipher_encrypt' should check if the pointer 'c' exists.
In case it doesn't exist it should return an appropriate error code such as
'err_status_no_such_op'.


I think macro 'cipher_encrypt' should expand to:

((c) ? (((c)->type)->encrypt(((c)->state), (enc_buf), (&len))) :
err_status_no_such_op)

instead of:

(((c)->type)->encrypt(((c)->state), (enc_buf), (&len)))


-Gaurav Nangla

Re: [Srtp-development] openssl patch breaks libsrtp when not using openssl

[John F. (foleyj) <fo...@ci...>]

Thanks for reporting the issue.  I'll take a look and commit a fix.

Sent from my iPad

> On Apr 25, 2014, at 7:20 PM, "Sergio Garcia Murillo" <ser...@gm...> wrote:
> 
> Hi,
> 
> I filled an issue that has got us crazy during this week that was caused 
> by the openssl patch that was merged recently:
> 
> https://github.com/cisco/libsrtp/issues/49
> 
> The cipher_t structure was extended with a new member "algrorithm" that 
> is not set on the cipher alloc function when not using the openssl lib 
> (aes_icm.c and aes_gcm.c). This causse the value to go random and in 
> some rare cases (like 1 in 64 sessions in my tests) causing strange 
> cipher_fail errors on srtp_protect and srtp_unprotect.
> 
> Best regards
> Sergio
> 
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