Question

I am trying to create an md5 value in php using the instruction given. I can’t seem to get it right and would like you help understanding the instructions and the code.

This is what the instructions say:

The md5 is constructed by performing an MD5 calculation on a string built up by concatenating these fields. Specifically the MD5 hash is a concatenation of the following fields:

• $user_id

• $trans_id

• the uppercase MD5 value of the ASCII
  equivalent of the word ‘secret’

• $amount

• $currency

• in $status

In order to calculate it yourself concatenate them and perform a MD5 calculation on this string.

Answer 1

$yourMd5 = md5($user_id . $trans_id . strtoupper(md5('secret')) . $amount . $currency . $status);

That is what I interpreted the question as.

Of course, you could precompute the hash for the uppercase hash of secret. But if it’s homework, probably best to show your work like above.