metasploit-framework

https://github.com/rapid7/metasploit-framework

Ruby

Metasploit Framework

MetasploitModule#calc_new_size

take the original size and calculate a new one that meets the following
requirements:
  - large enough to store all of the image data and the assembly stub
  - is also a valid x86 jmp instruction to land on the assembly stub

Source | Google | Stack overflow

Edit

git clone [email protected]:rapid7/metasploit-framework.git

cd metasploit-framework

open modules/encoders/x86/bmp_polyglot.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-MetasploitModule-calc_new_size-for-pr

# Commit to git

git add modules/encoders/x86/bmp_polyglot.rbgit commit -m "better docs for MetasploitModule#calc_new_size"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-MetasploitModule-calc_new_size-for-pr

hub pull-request

# Celebrate!