[CIFS] distinguish between Kerberos and MSKerberos in upcall
Properly handle MSKRB5 by passing sec=mskrb5 to the upcall so that the
spengo blob can be generated appropriately. Also, make
decode_negTokenInit prefer whichever mechanism is first in the list.
Needed for some NetApp servers, and possibly some older
versions of Windows which treat the two KRB5 mechanisms differently.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index 5fabd2c..1b09f16 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -476,6 +476,7 @@
unsigned int cls, con, tag, oidlen, rc;
bool use_ntlmssp = false;
bool use_kerberos = false;
+ bool use_mskerberos = false;
*secType = NTLM; /* BB eventually make Kerberos or NLTMSSP the default*/
@@ -574,10 +575,12 @@
*(oid + 1), *(oid + 2), *(oid + 3)));
if (compare_oid(oid, oidlen, MSKRB5_OID,
- MSKRB5_OID_LEN))
- use_kerberos = true;
+ MSKRB5_OID_LEN) &&
+ !use_kerberos)
+ use_mskerberos = true;
else if (compare_oid(oid, oidlen, KRB5_OID,
- KRB5_OID_LEN))
+ KRB5_OID_LEN) &&
+ !use_mskerberos)
use_kerberos = true;
else if (compare_oid(oid, oidlen, NTLMSSP_OID,
NTLMSSP_OID_LEN))
@@ -630,6 +633,8 @@
if (use_kerberos)
*secType = Kerberos;
+ else if (use_mskerberos)
+ *secType = MSKerberos;
else if (use_ntlmssp)
*secType = NTLMSSP;