Raw RSA encryption
mads at kiilerich.com
Sat Jul 24 03:07:34 CEST 2010
The new gnutls/crypto.h exposes fine functionality for using
stream/block ciphers and hash algorithms directly.
But I also need raw RSA encryption and can't figure out how to do it -
or if it is possible. I just need the basic modulo-exponentiation, for
example with values from gnutls_x509_crt_get_pk_rsa_raw.
It seems like it is possible to register such a function with
gnutls_crypto_pk_register2, but there is no way to retrieve the internal
implementation? Or is it OK to use _gnutls_pk_ops.encrypt?
Or should I access gcrypt directly, possibly by duplicating the content
(In either case it seems like I need to figure out how the simple
bigendian format of gnutls_datum_t from gnutls_x509_crt_get_pk_rsa_raw
relates to bigint_t?)
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