Encrypting/decrypting 3DES in Ruby

Question

I have a key.bin file which content is something along the lines of:

-12, 110, 93, 14, -48, ...

This is being used by a service to decrypt

Answer 1

Got it working!

Here's how:

Decryption

def read_key(key_file)
  File.read(key_file).split(',').map { |x| x.to_i }.pack('c*')
end
des = OpenSSL::Cipher::Cipher.new('des-ede3')
des.decrypt
des.key = read_key('key.bin')

result = des.update(decoded) + des.final

Encryption

def read_key(key_file)
  File.read(key_file).split(',').map { |x| x.to_i }.pack('c*')
end
des2 = OpenSSL::Cipher::Cipher.new('des-ede3')
des2.encrypt
des2.key = read_key('key.bin')

result = des2.update(result) + des2.final
puts Base64.encode64(result)