Re: Detecting/parsing a hex string

["Josef 'Jupp' Schugt" <jupp () gmx de>]

On Wed, 08 Oct 2008 13:25:03 +0200, Ron <ron () skullsecurity net> wrote:

> I need to detect whether or not a string is an ascii representation of a  
> hex string (eg, "12ab3d1a3badabeea1...."), and, if it is, to convert it  
> to a binary string. Is there an easy way to do that (maybe with  
> bin.pack/bin.unpack)?

Only to note that: detection if a string *is* an ascii representation of a  
hex string is impossible. You can only detect if it looks *like* one:

'bad'.to_i(16)  # ->  2989
'dead'.to_i(16) # -> 57005

Depending on context 'bad' and 'dead' may be words or hexadecimal numbers.

Josef 'Jupp' Schugt
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