RSA sign/verify and hash generation functions

Murray S. Kucherawy msk at
Tue Nov 30 19:01:57 CET 2010

> -----Original Message-----
> From: Nikos Mavrogiannopoulos [mailto:n.mavrogiannopoulos at] On Behalf Of Nikos Mavrogiannopoulos
> Sent: Tuesday, November 30, 2010 9:08 AM
> To: Murray S. Kucherawy
> Cc: help-gnutls at
> Subject: Re: RSA sign/verify and hash generation functions
> > Does gnutls-2.11.4 provide a reasonable interface for libgcrypt for
> > working with that key format?
> What key format? X.509 is a format for certificates. gnutls does support
> various key formats and most probably the one you might mean.

Sorry, you're right.  I meant to say PEM format, i.e. the default output of openssl's "genrsa" function.  For the signing operation in the application I'm looking to port, the key will either be in PEM or DER form.  For verifying, it will be in PEM form with the "BEGIN" and "END" tags removed.

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