[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;
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index 2434ab0..117ef4b 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -114,9 +114,11 @@
dp = description + strlen(description);
- /* for now, only sec=krb5 is valid */
+ /* for now, only sec=krb5 and sec=mskrb5 are valid */
if (server->secType == Kerberos)
sprintf(dp, ";sec=krb5");
+ else if (server->secType == MSKerberos)
+ sprintf(dp, ";sec=mskrb5");
else
goto out;
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 7e1cf26..8dfd6f2 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -80,7 +80,8 @@
NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
RawNTLMSSP, /* NTLMSSP without SPNEGO */
NTLMSSP, /* NTLMSSP via SPNEGO */
- Kerberos /* Kerberos via SPNEGO */
+ Kerberos, /* Kerberos via SPNEGO */
+ MSKerberos, /* MS Kerberos via SPNEGO */
};
enum protocolEnum {
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index ed150ef..3188e4d 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -505,7 +505,7 @@
unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
- } else if (type == Kerberos) {
+ } else if (type == Kerberos || type == MSKerberos) {
#ifdef CONFIG_CIFS_UPCALL
struct cifs_spnego_msg *msg;
spnego_key = cifs_get_spnego_key(ses);
