pylibsrtp is a Python wrapper around libsrtp, making it possible to encrypt and decrypt Secure Real-time Transport Protocol (SRTP) packets from Python code.

SRTP is a profile of the Real-time Transport Protocol (RTP) which provides confidentiality, message authentication, and replay protection. It is defined by RFC 3711.

You can install pylibsrtp with pip:

$ pip install pylibsrtp

To learn more about pylibsrtp please read the documentation.

#!/usr/bin/env python from pylibsrtp import Policy, Session key = (b'\x00' * 30) rtp = b'\x80\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' + (b'\xd4' * 160) # protect RTP tx_policy = Policy(key=key, ssrc_type=Policy.SSRC_ANY_OUTBOUND) tx_session = Session(policy=tx_policy) srtp = tx_session.protect(rtp) # unprotect RTP rx_policy = Policy(key=key, ssrc_type=Policy.SSRC_ANY_INBOUND) rx_session = Session(policy=rx_policy) rtp2 = rx_session.unprotect(srtp) # check roundtrip worked! assert rtp2 == rtp

If you wish to build pylibsrtp yourself, you will need libsrtp version 2.0 or better.

On Debian/Ubuntu run:

$ apt install libsrtp2-dev

On Fedora/CentOS run:

$ dnf install libsrtp-devel

On macOS run:

$ brew install srtp

You will need to set some environment variables to link against libsrtp:

export CFLAGS=-I$(brew --prefix openssl)/include -I$(brew --prefix srtp)/include export LDFLAGS=-L$(brew --prefix openssl)/lib -L$(brew --prefix srtp)/lib

pylibsrtp is released under the BSD license.