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[CIFS] add OIDs for KRB5 and MSKRB5 to ASN1 parsing routines

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Also, fix the parser to recognize them and set the secType
accordingly. Make CIFSSMBNegotiate not error out automatically
after parsing the securityBlob.

Also thanks to Q (Igor) and Simo for their help on this
set of kerberos patches (and Dave Howells for help on the
upcall).

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2007-11-03 05:11:06 +00:00 committed by Steve French
parent 84a15b9354
commit e545937a51
3 changed files with 26 additions and 13 deletions
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35
fs/cifs/asn1.c
View File

@ -77,8 +77,12 @@
#define SPNEGO_OID_LEN 7
#define NTLMSSP_OID_LEN 10
#define KRB5_OID_LEN 7
#define MSKRB5_OID_LEN 7
static unsigned long SPNEGO_OID[7] = { 1, 3, 6, 1, 5, 5, 2 };
static unsigned long NTLMSSP_OID[10] = { 1, 3, 6, 1, 4, 1, 311, 2, 2, 10 };
static unsigned long KRB5_OID[7] = { 1, 2, 840, 113554, 1, 2, 2 };
static unsigned long MSKRB5_OID[7] = { 1, 2, 840, 48018, 1, 2, 2 };
/*
* ASN.1 context.
@ -457,6 +461,7 @@ decode_negTokenInit(unsigned char *security_blob, int length,
unsigned long *oid = NULL;
unsigned int cls, con, tag, oidlen, rc;
int use_ntlmssp = FALSE;
int use_kerberos = FALSE;
*secType = NTLM; /* BB eventually make Kerberos or NLTMSSP the default*/
@ -545,18 +550,28 @@ decode_negTokenInit(unsigned char *security_blob, int length,
return 0;
}
if ((tag == ASN1_OJI) && (con == ASN1_PRI)) {
rc = asn1_oid_decode(&ctx, end, &oid, &oidlen);
if (rc) {
if (asn1_oid_decode(&ctx, end, &oid, &oidlen)) {
cFYI(1,
("OID len = %d oid = 0x%lx 0x%lx "
"0x%lx 0x%lx",
oidlen, *oid, *(oid + 1),
*(oid + 2), *(oid + 3)));
rc = compare_oid(oid, oidlen,
NTLMSSP_OID, NTLMSSP_OID_LEN);
kfree(oid);
if (rc)
if (compare_oid(oid, oidlen,
MSKRB5_OID,
MSKRB5_OID_LEN))
use_kerberos = TRUE;
else if (compare_oid(oid, oidlen,
KRB5_OID,
KRB5_OID_LEN))
use_kerberos = TRUE;
else if (compare_oid(oid, oidlen,
NTLMSSP_OID,
NTLMSSP_OID_LEN))
use_ntlmssp = TRUE;
kfree(oid);
}
} else {
cFYI(1, ("Should be an oid what is going on?"));
@ -609,12 +624,10 @@ decode_negTokenInit(unsigned char *security_blob, int length,
ctx.pointer)); /* is this UTF-8 or ASCII? */
}
/* if (use_kerberos)
*secType = Kerberos
else */
if (use_ntlmssp) {
if (use_kerberos)
*secType = Kerberos;
else if (use_ntlmssp)
*secType = NTLMSSP;
}
return 1;
}

1
fs/cifs/cifsfs.c
View File

@ -44,6 +44,7 @@
#include "cifs_fs_sb.h"
#include <linux/mm.h>
#include <linux/key-type.h>
#include "cifs_spnego.h"
#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
#ifdef CONFIG_CIFS_QUOTA

3
fs/cifs/cifssmb.c
View File

@ -647,8 +647,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
count - 16,
&server->secType);
if (rc == 1) {
/* BB Need to fill struct for sessetup here */
rc = -EOPNOTSUPP;
rc = 0;
} else {
rc = -EINVAL;
}