Skip to content

Instantly share code, notes, and snippets.

@wesgarrison
Forked from fcoury/gist:84093
Created May 9, 2012 04:08
Show Gist options
  • Save wesgarrison/2641720 to your computer and use it in GitHub Desktop.
Save wesgarrison/2641720 to your computer and use it in GitHub Desktop.
# For the queasy, this is MIT licensed. See comment at the end.
module MySQLEncryption
# Mimics MySQL's AES_ENCRYPT() and AES_DECRYPT() encryption functions
def mysql_encrypt(s, key)
encrypt(s, mysql_key(key))
end
def mysql_decrypt(s, key)
decrypt(s, mysql_key(key))
end
protected
def aes(m,k,t)
(aes = OpenSSL::Cipher::AES128.new("ECB").send(m)).key = k
aes.update(t) << aes.final
end
def encrypt(text, key)
aes(:encrypt, key, text)
end
def decrypt(text, key)
aes(:decrypt, key, text)
end
def mysql_key(key)
final_key = "\0" * 16
key.length.times do |i|
final_key[i%16] = final_key[i%16] ^ key[i]
end
final_key
end
end
=begin
Copyright (c) 2009 Felipe Coury
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
=end
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment