RSA sign/verify and hash generation functions

[Nikos Mavrogiannopoulos]

On 12/16/2010 06:49 PM, Murray S. Kucherawy wrote:

>> What do you mean by key size? The indicator returned by
>> gnutls_pubkey_get_pk_algorithm()?
> 
> It's telling me the key is zero bits long.  My call sequence is:
> 
> bits = 0;
> gnutls_pubkey_init(&X)
> gnutls_pubkey_import(X, &keydata, GNUTLS_X509_FMT_DER);
> gnutls_pubkey_verify_hash(X, 0, &digest, &signature);  <== works; returns 1
> gnutls_pubkey_get_pk_algorithm(X, &bits);
> assert(bits > 0);  <== FAILS
> 
> It looks like key->bits is never set to anything by gnutls_pubkey_import().

It was not set when importing from a raw format. Should work now.

>> I've just added (not tested yet) gnutls_pubkey_import_privkey() that
>> will import the public parameters from a gnutls_privkey_t structure.
>>
>> Thus it would still be quite some calls, but you don't need to export
>> anything. How does it look?
>>
>> gnutls_x509_privkey_init(A)
>> gnutls_x509_privkey_import(A)
>> gnutls_privkey_init(P)
>> gnutls_privkey_import_x509(P,A)
>> gnutls_pubkey_init(B)
>> gnutls_pubkey_import_privkey(B,P)
> 
> Works for me.  Let me know when you'd like me to grab a snapshot and try it.

Should work by now.

regards,
Nikos