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-devand then:
pip install dsrtpCan be via cli or as python lib.
To e.g. decrypt captured packets and write them back to a capture file from command line:
dsrtp test/fixtures/av.pcap /tmp/rtp.pcap -k test/fixtures/av_material.hex -ldIf 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 -ld -i 192.168.121.234:60401 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 Cythonthen get it:
git clone git@github.com:mayfieldrobotics/dsrtp.git
cd dsrtp
workon dsrtp
pip install -e .[test]and test it:
py.test test/ --cov dsrtp --cov-report term-missing --pep8Tests pass:
py.test test/ --cov dsrtp --cov-report term-missing --pep8so update __version__ in dsrtp/__init__.py. Commit and tag it:
git commit -am "release v{version}"
git tag -a v{version} -m "release v{version}"
git push --tags