Re: Using Crypt::DSA


"Mike Friedman" <mikef@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message

[snip]

>
> I want to be able to create a public key file and a signature in formats
> that can be distributed to a user community whose applications may be
> using other DSA implementations (e.g., Java crypto lib, or other scripting
> languages besides perl). So, it's important that the public key file be
> in a reasonably standard format.

Which, afaik, would be a pem file. Crypt::DSA can parse them (as long as you
have Convert::PEM) and so, presumably, can the other DSA implementations. To
write a *public* key pem file with Crypt::DSA you just do (as in 04-pem.t):

$key->priv_key(undef);
$key->write( Type => 'PEM', Filename => $keyfile);


> Also, I'd be passing the signature as
> a base64-encoded string via a web form field. Once the application
> base64-decodes it, the signature should be in a format easily fed to its
> DSA verify routine.
>

Are you saying the signature part is not a problem ? I find some ambiguity
with "the signature should be in a format easily fed to its DSA verify
routine" - not sure whether that means the signature is already in a
suitable format, or whether it means that it needs to be in a suitable
format (but isn't).

Cheers,
Rob


.

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