Skip to main content

Frontend for decrypting captured SRTP packets.

Project description

Simple front-end for decrypting captured SRTP and SRTCP packets using:


Install devel libpcap and libsrtp if you need to, e.g.:

sudo apt-get install libpcap-dev libsrtp0-dev

and then:

pip install dsrtp



To e.g. decrypt captured packets and write then back to a capture file:

dsrtp test/fixtures/av.pcap /tmp/rtp.pcap -ld -k test/fixtures/av_material.hex

If you have a cluttered capture (e.g. multiple SRTP streams) then you can select e.g. the in-bound stream by address:port like:

dsrtp test/fixtures/av.pcap /tmp/rtp.pcap -k test/fixtures/av_material.hex -l d -i


To do the same in code:

import dsrtp

enc_km = open('test/fixtures/av_material.hex').read()
km = dsrtp.KeyingMaterial.unpack_hex(enc_km)
p = dsrtp.SRTPPolicy(ssrc_type=dsrtp.SRTPPolicy.SSRC_ANY_INBOUND, key=km.local)

with dsrtp.SRTP(p) as ctx, \
        open('test/fixtures/av.pcap', 'rb') as srtp_pcap, \
        open('/tmp/rtp.pcap', 'wb') as rtp_pcap:
  pkts = dsrtp.read_packets(srtp_pcap)
  decrypted_pkts = dsrtp.decrypt_packets(ctx, pkts)
  dsrtp.write_packets(rtp_pcap, decrypted_pkts)


Create a venv:

mkvirtualenv dsrtp
pip install Cython

then get it:

git clone
cd dsrtp
workon dsrtp
pip install -e .[test]

and test it:

py.test test/ --cov dsrtp --cov-report term-missing --pep8


Tests pass:

py.test test/ --cov dsrtp --cov-report term-missing --pep8

so update __version__ in:

  • dsrtp/

commit and tag it:

git commit -am "release v{version}"
git tag -a v{version} -m "release v{version}"
git push --tags

and travis will publish it to pypi.

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

dsrtp-0.2.0.tar.gz (66.6 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page