require 'openssl'
require 'base64'
require 'nokogiri'
require 'securerandom'

xml         = File.read('spec/fixtures/encryptedResponse.xml')
private_key = OpenSSL::PKey::RSA.new File.read('spec/fixtures/keysncerts/userkey.pem'), 'hello'

cv  = Base64.decode64 "YYq0hkSXofEEiiZ2LdCx8M/yvR0P+G4U510Bqkg4E3YoApqPJinqmOlNU7x/MChZp23zWHJqS4fH0VtK5ZT8gToEwbKQ/DsjYFQXVCRHxjrRp0Mfrvj89bTpivA3TPdVXhS80MFqtd7NfKEQSI4roJY9JgDvn45j77oXurr6h1c="
cv2 = Base64.decode64 "TQzLeeCNG8y8+C1XpC7ZNtvrCyIOl7e4b1zOUwARlbmiIC1YIUHl38uhAkw0B7+BNZ9inafH2RyWO8MH5XSs4O7cyLkNJXETmc1CFozTa2J4DWLqDOByyT0LqlGir80PjfCeOnSFsLR9SCnvJpcpuEseRHfXnotnMpP1fQFiSheKGEb/oXn9feVxqlvBOOK0VHxFqis0Cb4KYsQWu0DiujBZQMj+tKNnnodb6jNwKcR4JDNda2JwWxXs0hViumO/2AC+YhAoiVBwPH2rXBv+yXkQcI0y8u+B9fYSoZ2pNXk="

key = private_key.private_decrypt(cv)

cipher = OpenSSL::Cipher::Cipher.new('des-ede3-cbc')
cipher.decrypt
cipher.padding = 0
cipher.key     = key
cipher.iv      = cv2[0..8]

out = cipher.update(cv2[8..-1])
out << cipher.final

puts out.inspect

out = out[0...-out.bytes.to_a.last]

cipher.encrypt
cipher.padding = 0
cipher.key = key
cipher.iv = cv2[0..8]

padding_length = (out.length % 8)
padding = SecureRandom.random_bytes(padding_length -1) + padding_length.chr
puts padding.inspect

out = cipher.update(out + padding)
out << cipher.final

cv2 = out

key = private_key.private_decrypt(cv)

cipher = OpenSSL::Cipher::Cipher.new('des-ede3-cbc')
cipher.decrypt
cipher.padding = 0
cipher.key     = key
cipher.iv      = cv2[0..8]

out = cipher.update(cv2[8..-1])
out << cipher.final

puts out.inspect

out = out[0...-out.bytes.to_a.last]

puts out.inspect

#doc = Nokogiri::XML::Document.parse(xml)
#
#wrapped_key = Base64.decode64('BxnBnHLtE1IjI9bTGDVs9EyJspS46SJrX4r3yYRdBJYawEp5AHWx6SgVB1TuU466ORIPX0HqdUvy8efOP/7gHhFlm/noKc+qToD1YSvGQ27kJdZbBJE+kcnDZpgqPHCR+fr3Nv/WfN+eZRYMlky1D8JaWFd1P6Eqi8xqY1BirHQ=')
#
#private_key = OpenSSL::PKey::RSA.new File.read('spec/fixtures/post-office.pem')
#key = private_key.private_decrypt(wrapped_key, OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)
#
#bytes = Base64.decode64(c2).unpack('C*')
#puts key.inspect
#
#iv     = bytes.pack('c16')
#others = bytes.pack('c16X16c*')
#
#cipher = OpenSSL::Cipher.new('aes-128-cbc')
#cipher.decrypt
#cipher.iv  = Base64.decode64(c2)[0..15]
#cipher.key = key
#
#out = cipher.update(others)
#
#The encrypted string's length might not be a multiple of the block
#length of aes-128-cbc (16), so add in another block and then trim
#off the padding. More info about padding is available at
#http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/Overview.html in
#Section 5.2
#puts out << cipher.update("\x00" * 16)
#puts out[0...(-out.bytes.to_a.last)]
#