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Groups > comp.lang.python > #53357

HMAC encription issue

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Hi, I need to create a HMAC in Python just the way the following Javascript code does:

var credentials = "admin:amin";
key="4545453030303743303134462035343733373432363420323031332D30382D33312031343A33353A3035"
var shaObj = new jsSHA(credentials, "ASCII");
var hash = shaObj.getHMAC(key, "HEX", "HEX"); 

----

in this case the hash is: 8347ce7126c1068aa183fbfdafe2c17a9cc86734

This javascript library can be tested here: http://caligatio.github.io/jsSHA/


So I'm trying to do the same in Python by:

key="4545453030303743303134462035343733373432363420323031332D30382D33312031343A33353A303$

credentials = "admin:admin"

hash = hmac.new(key, credentials, hashlib.sha1).hexdigest()

-----

which gives me hash= 2c7e849a0eaa8cd0cc1120f6f156913755b674b6

Something's is wrong obviously. Maybe it has probably something to do with the encoding of the key or credentials but I'm lost on this.

I tried to convert key to hex using the following function

def toHex(s):
    lst = []
    for ch in s:
        hv = hex(ord(ch)).replace('0x', '')
        if len(hv) == 1:
            hv = '0'+hv
        lst.append(hv)

    return reduce(lambda x,y:x+y, lst)

But this didn't work either.


Any help would be appreciated!

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HMAC encription issue sergio7654@gmail.com - 2013-08-31 07:24 -0700
  Re: HMAC encription issue Roy Smith <roy@panix.com> - 2013-08-31 10:39 -0400
    Re: HMAC encription issue Sergio Sanchez <sergio7654@gmail.com> - 2013-08-31 07:48 -0700
      Re: HMAC encription issue Roy Smith <roy@panix.com> - 2013-08-31 11:01 -0400
      Re: HMAC encription issue Sergio Sanchez <sergio7654@gmail.com> - 2013-08-31 08:16 -0700

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