This library implements a decrypter for ciphertext originating from a device using a Derived Unique Key Per Transaction (DUKPT) scheme.
Add this line to your application's Gemfile:
gem 'dukpt'
And then execute:
$ bundle
Or install it yourself as:
$ gem install dukpt
# Instantiate a decrypter with your base derivation key (BDK)
decrypter = DUKPT::Decrypter.new("0123456789ABCDEFFEDCBA9876543210")
# You can specify whether you want to use "ecb" cipher mode if needed. The default is "cbc".
decrypter = DUKPT::Decrypter.new("0123456789ABCDEFFEDCBA9876543210", "ecb")
# Pass the ciphertext and the current Key Serial Number (KSN), as hex encoded strings, to the decryptor to get back the plaintext
ksn = "FFFF9876543210E00008"
ciphertext = "C25C1D1197D31CAA87285D59A892047426D9182EC11353C051ADD6D0F072A6CB3436560B3071FC1FD11D9F7E74886742D9BEE0CFD1EA1064C213BB55278B2F12"
plaintext = decrypter.decrypt(ciphertext, ksn) # => "%B5452300551227189^HOGAN/PAUL ^08043210000000725000000?\x00\x00\x00\x00"
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Added some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request
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