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Extract RTP and Decrypt SRTP Audio streams from .PCAP files in the browser using WASM

Status

• WASM code is working, but experimental

Build Native

x86_64

./build.sh

WASM using Docker

./build-wasm-docker.sh

WASM Module Usage

Check out the included example for API usage

npm run test

Functions

• [x] analyze_pcap
• [x] extract_pcap
• [x] decrypt_pcap

API

const api = {
  version: Module.cwrap('version', 'string', []), // null
  analyze: Module.cwrap('analyze_pcap', 'string', ['string']), // filename
  extract: Module.cwrap('extract_pcap', 'string', ['string', 'string']), // ssrc, filename
  extract: Module.cwrap('decrypt_pcap', 'string', ['string', 'string', 'string']), // ssrc, key, filename
};

Command-Line Usage

./dist/rtptool analyze <input file>

Extract RTP streams by ssrc prefixed by 0x

./dist/rtptool extract <ssrc> <input file>

Decrypt SRTP streams by ssrc using the RFC4568 key

./dist/rtptool decrypt <ssrc> <key> <input file>

Example Key: AES_CM_128_HMAC_SHA1_80 inline:fCaLYx1IEhD62eKqFIGOk1qykNikYcamkFVkde1b|2^31|1:1

Credits

Based on srtpdecrypt