Mailing List Archive: Buffer sizes

Buffer sizes

Jul 24, 2003, 11:08 AM

Post #1 of 3 (562 views)

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Hi,

is there a way to estimate the size of the encrypted data if you know the size
of the plain text for a given algorithm (in my case RSA with 1024 bit keys)?

Or is there a way to determine the size of the data in a gcry_ac_data_t object
that holds the encryted data?

I need this value for creating buffers for converting the MPI values of the
data set to strings.

Best regards,
Ralf.
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Re: Buffer sizes [ In reply to ]

wk at gnupg

Jul 25, 2003, 12:58 AM

Post #2 of 3 (554 views)

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On Thu, 24 Jul 2003 20:08:11 +0200, Ralf Schneider said:

> I need this value for creating buffers for converting the MPI values of the
> data set to strings.

Use gcry_mpi_aprint; it returns an allocated buffer of the approriate size.

--
Werner Koch <wk@gnupg.org>
The GnuPG Experts http://g10code.com
Free Software Foundation Europe http://fsfeurope.org

Re: Buffer sizes [ In reply to ]

ralf at tapfere-schneiderleins

Jul 25, 2003, 1:39 AM

Post #3 of 3 (549 views)

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Am Freitag, 25. Juli 2003 09:58 schrieb Werner Koch:
> On Thu, 24 Jul 2003 20:08:11 +0200, Ralf Schneider said:
> > I need this value for creating buffers for converting the MPI values of
> > the data set to strings.
>
> Use gcry_mpi_aprint; it returns an allocated buffer of the approriate size.

Great! Thanks a lot.

Best regards,
Ralf.
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