From eab3667490df5c2008b7aaaef5e626c099ea86fd Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@redhat.com>
Date: Tue, 19 Aug 2008 21:29:41 -0400
Subject: [PATCH] cifs.upcall: handle MSKRB5 OID properly

When the kernel sends the upcall a sec=mskrb5 parameter, that means
the the MSKRB5 OID is preferred by the server. This patch fixes the
upcall to use that OID in place of the "normal" krb5 OID when it
gets a sec=mskrb5 parameter.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Steve French <smfrench@gmail.com>
(cherry picked from commit c30d73035dd202d0055ed7ede243e1703c4e9450)
---
 source/client/cifs.upcall.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/source/client/cifs.upcall.c b/source/client/cifs.upcall.c
index aa5eb57310a..fd3ed17d2dd 100644
--- a/source/client/cifs.upcall.c
+++ b/source/client/cifs.upcall.c
@@ -29,7 +29,7 @@ create dns_resolver * * /usr/local/sbin/cifs.upcall %k
 
 #include "cifs_spnego.h"
 
-const char *CIFSSPNEGO_VERSION = "1.1";
+const char *CIFSSPNEGO_VERSION = "1.2";
 static const char *prog = "cifs.upcall";
 typedef enum _secType {
 	KRB5,
@@ -73,7 +73,7 @@ int handle_krb5_mech(const char *oid, const char *principal,
 	tkt_wrapped = spnego_gen_krb5_wrap(tkt, TOK_ID_KRB_AP_REQ);
 
 	/* and wrap that in a shiny SPNEGO wrapper */
-	*secblob = gen_negTokenInit(OID_KERBEROS5, tkt_wrapped);
+	*secblob = gen_negTokenInit(oid, tkt_wrapped);
 
 	data_blob_free(&tkt_wrapped);
 	data_blob_free(&tkt);
@@ -118,6 +118,9 @@ int decode_key_description(const char *desc, int *ver, secType_t * sec,
 			if (strncmp(tkn + 4, "krb5", 4) == 0) {
 				retval |= DKD_HAVE_SEC;
 				*sec = KRB5;
+			} else if (strncmp(tkn + 4, "mskrb5", 6) == 0) {
+				retval |= DKD_HAVE_SEC;
+				*sec = MS_KRB5;
 			}
 		} else if (strncmp(tkn, "uid=", 4) == 0) {
 			errno = 0;
@@ -219,7 +222,7 @@ int main(const int argc, char *const argv[])
 	uid_t uid;
 	int kernel_upcall_version;
 	int c, use_cifs_service_prefix = 0;
-	char *buf, *hostname = NULL;
+	char *buf, *oid, *hostname = NULL;
 
 	openlog(prog, 0, LOG_DAEMON);
 
@@ -301,6 +304,7 @@ int main(const int argc, char *const argv[])
 
 	// do mech specific authorization
 	switch (sectype) {
+	case MS_KRB5:
 	case KRB5:{
 			char *princ;
 			size_t len;
@@ -319,8 +323,12 @@ int main(const int argc, char *const argv[])
 			}
 			strlcpy(princ + 5, hostname, len - 5);
 
-			rc = handle_krb5_mech(OID_KERBEROS5, princ,
-					      &secblob, &sess_key);
+			if (sectype == MS_KRB5)
+				oid = OID_KERBEROS5_OLD;
+			else
+				oid = OID_KERBEROS5;
+
+			rc = handle_krb5_mech(oid, princ, &secblob, &sess_key);
 			SAFE_FREE(princ);
 			break;
 		}
-- 
2.11.4.GIT