From: Brian Candler <b.candler@...>
Date: 2008-12-15T20:57:52+09:00
Subject: Re: Ruby encryption

Archana Thota wrote:
> Output of php encryption code and output of rails encryption code are
> not same.

Presumably they're not doing the same things. In particular, I see that 
you're doing an SHA1 on the key in the Ruby code, but not the php.

Try inserting debugging to look at intermediate values, e.g.

   puts "key = #{key.inspect}"

(and whatever the PHP equivalent is in the PHP code)

Also, I have no idea what you're doing with all that SHA1 unpacking, 
mapping and packing. It seems that the final result is the same as a 
simple Digest::SHA1.digest, but with 12 extra zeros on the end.

irb(main):001:0> password = "foobar"
=> "foobar"
irb(main):002:0> require 'digest/sha1'
=> true
irb(main):003:0> 
Digest::SHA1.hexdigest(password).unpack('a2'*32).map{|x| 
x.hex}.pack('c'*32)
=> 
"\210C\327\371$\026!\035\351\353\271c\377L\342\201%\223(x\000\000\000\000\000\000\000\000\000\000\000\000"
irb(main):004:0> Digest::SHA1.digest(password)
=> "\210C\327\371$\026!\035\351\353\271c\377L\342\201%\223(x"
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