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| author | Stefan Metzmacher <metze@samba.org> | 2010-12-23 08:17:48 +0100 |
|---|---|---|
| committer | Stefan Metzmacher <metze@samba.org> | 2010-12-23 09:38:43 +0100 |
| commit | e9dddc55e324c62973e6a561477b532cf9ed79af (patch) | |
| tree | 0fc35eb4f3382a7ea68060eec01584fa0dfbcb87 /source3 | |
| parent | 30d29e64cb5e0f1360ff47dd6d074d25fa86e5fd (diff) | |
| download | samba-e9dddc55e324c62973e6a561477b532cf9ed79af.tar.gz samba-e9dddc55e324c62973e6a561477b532cf9ed79af.tar.bz2 samba-e9dddc55e324c62973e6a561477b532cf9ed79af.zip | |
s3:libsmb: use 16 zero bytes as channel binding checksum in the gssapi checksum (bug #7883)
This fixes SMB session setups with kerberos against some closed
source SMB servers.
The new behavior matches heimdal and mit.
metze
Autobuild-User: Stefan Metzmacher <metze@samba.org>
Autobuild-Date: Thu Dec 23 09:38:43 CET 2010 on sn-devel-104
Diffstat (limited to 'source3')
| -rw-r--r-- | source3/libsmb/clikrb5.c | 30 |
1 files changed, 10 insertions, 20 deletions
diff --git a/source3/libsmb/clikrb5.c b/source3/libsmb/clikrb5.c index 5d51a5b19c..b4962a0203 100644 --- a/source3/libsmb/clikrb5.c +++ b/source3/libsmb/clikrb5.c @@ -704,26 +704,16 @@ static krb5_error_code create_gss_checksum(krb5_data *in_data, /* [inout] */ memset(gss_cksum, '\0', base_cksum_size + orig_length); SIVAL(gss_cksum, 0, GSSAPI_BNDLENGTH); - /* Precalculated MD5sum of NULL channel bindings (20 bytes) */ - /* Channel bindings are: (all ints encoded as little endian) - - [4 bytes] initiator_addrtype (255 for null bindings) - [4 bytes] initiator_address length - [n bytes] .. initiator_address data - not present - in null bindings. - [4 bytes] acceptor_addrtype (255 for null bindings) - [4 bytes] acceptor_address length - [n bytes] .. acceptor_address data - not present - in null bindings. - [4 bytes] application_data length - [n bytes] .. application_ data - not present - in null bindings. - MD5 of this is ""\x14\x8f\x0c\xf7\xb1u\xdey*J\x9a%\xdfV\xc5\x18" - */ - - memcpy(&gss_cksum[4], - "\x14\x8f\x0c\xf7\xb1u\xdey*J\x9a%\xdfV\xc5\x18", - GSSAPI_BNDLENGTH); + /* + * GSS_C_NO_CHANNEL_BINDINGS means 16 zero bytes. + * This matches the behavior of heimdal and mit. + * + * And it is needed to work against some closed source + * SMB servers. + * + * See bug #7883 + */ + memset(&gss_cksum[4], 0x00, GSSAPI_BNDLENGTH); SIVAL(gss_cksum, 20, gss_flags); |