Hi guys i found this encryption decryption in php and try to convert it in rails but i am unable to successfully convert it. So plz help me. I you write the whole conversion code then it will be great.
PHP code is like this
Even though i think you should use some known encryption algorythm, here's translated source (not tested):
require 'digest/md5' require 'base64'
class String def ^(value) rez = "" self.length.times { |i| rez << (self[i] ^ value[i % value.length].to_i) } rez end end
def get_rnd_iv(iv_len) chars = ("a".."z").to_a + ("A".."Z").to_a + ("0".."9").to_a iv = "" iv_len.times { iv << chars[rand(chars.size)] } return iv end
def md5_encrypt(plain_text, password, iv_len = 16 ) plain_text += "\x13"; # for some reason i believe that it should be \n instead of \x13, a bug in a script? plain_text += "\0" * (16 - plain_text.length % 16)
enc_text = get_rnd_iv(iv_len); iv = (password ^ enc_text)[0, 512];
(plain_text.length % 16).times do |i| block = plain_text[i * 16, 16] ^ Digest::MD5.hexdigest(iv) enc_text += block iv = (block + iv)[0, 512] ^ password end
return Base64.encode64(enc_text); end
def md5_decrypt(enc_text, password, iv_len = 16) enc_text = Base64.decode64(enc_text); plain_text = ''; iv = (password ^ enc_text[0, iv_len])[0, 512];
i, n = iv.length, enc_text.length while i < n block = enc_text[i, 16] plain_text += block ^ Digest::MD5.hexdigest(iv) iv = (block + iv)[0, 512] ^ password i += 16 end
return plain_text.gsub(/\x13\x00*$/, ''); end
I will try it and let you know. Thanks for support.
