Re: Allowed characters in SRS Hash

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Jean-Pierre Schwickerath wrote:
> I wondered if it is possible to exclude certain characters from being
> used where doing an SRS Hash with the Mail::SRS perl module?
> On my first try the module generated a hash that contained a slash (/).
> Unfortunately this character is not allowed in the local part with
> Postfix as MTA, so the bounce did not come back.

I'd suggest that you write a sub-class of Mail::SRS that overrides the 
hash_create() and hash_verify() methods (which use Digest::HMAC_SHA1:: 
b64digest() for the Base64 conversions) and substitutes any "/"s in the 
hash with another character, say ".".  hash_verify() would have to do the 
reverse to the passed hash (i.e. undo the substitution before the hash is 
verified), of course.

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