Burp Suite extension for encoding/decoding EVM calldata

Overview

unblocker

Burp Suite extension for encoding/decoding EVM calldata

0x00_prerequisites

  1. Burp Suite
  2. Java 8+
  3. Python 2.7

0x01_installation

  1. clone this repository
  2. in Burp, go to Extender->Options
    1. in the Java Environment section add /unblocker/ as "Folder for loading library JAR files"
    2. in the Python Environment section:
    3. add /unblocker/jython-standalone-2.7.2.jar as "Location of Jython standalone JAR file"
    4. add /unblocker/src/lib as "Folder for loading modules"
  3. in Burp, go to Extender->Extensions
    1. click "Add" in the Burp Extensions section and select /unblocker/unblocker.py as "Extension file (.jar)"--Burp will detect the filetype automatically
    2. confirm the installation by approving all subsequent modal windows

0x02_usage

Unblocker features ABI-less EVM calldata decoding but you can also provide the ABI yourself if you know it. Encoding does require you to provide some ABI.

  • ABI has to be provided like so: transfer(address, uint256).
  • Input data (for decoding) can be provided with or without 0x prepended.
  • Input data strings (for encoding) have to be provided like so: "s'hello, world'"
  • Input data bytes (for encoding) have to be provided like so: "b'deadbeef'"
  • Input data structs (for encoding) have to be provided with square brackets instead of parenthesis, like so: ["s'some string'", true, 123]
Owner
Halborn
ELITE CYBERSECURITY FOR BLOCKCHAIN COMPANIES
Halborn
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