Carolin, I just re-ran the x509signself self-test with gnutls 2.9.x and the hash size passed to the function is now 20 bytes. I suppose GnuTLS adds the right PKCS#1 ASN.1 OID internally. It occurs to me that perhaps the callback should receive the entire PKCS#1 blob, to avoid having the callback reconstruct it, instead of just the hash value, but maybe this is sufficient to make things work for you? I'll release 2.9.9 in a few minutes with some minor fixes, please test it.
/Simon Carolin Latze <[email protected]> writes: > Hi Simon, > > I tried to use TLS 1.2 with and without sign callback, and I still see a > signature of 36 bytes... Even if there is a leading SHA-1 OID, shouldn't > it be max 35 then? Maybe we should check, whether I check the right > variables: > > In gnutls_sig.c, method _gnutls_tls_sign_hdata, there is a structure > called dconcat. dconcat.size holds the hash size, right? and > dconcat.data should hold the hash itself? dconcat.size has a value of 36 > for me... > > If I use the sign callback, I print the value of hash->size (=36) and > hash->data (cannot see the OID included in that value, so for me it > looks like it is really not SHA-1 only). > > Maybe I check the wrong values? > > BTW: I used the latest Snapshot, 2.9.8 to test it. > > Sorry... :-/ > Carolin > > Simon Josefsson wrote: >> Carolin Latze <[email protected]> writes: >> >> >>> Hi all, >>> >>> according to RFC 5246, TLS 1.2 should use a standard signature, but if >>> I enable TLS 1.2 in GnuTLS and print out the hash size it says >>> 36... that does not sound like a standard signature.. I would expect >>> something like 20 for SHA1. Am I wrong? >>> >> >> Hi! With GnuTLS 2.9.7 I hope this should work better -- could you take >> a look? It should have more solid TLS 1.2 support. >> >> Thanks, >> Simon >> _______________________________________________ Help-gnutls mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gnutls
