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[CIFS] Fix sign mount option and sign proc config setting 

We were checking the wrong (old) global variable to determine
whether to override server and force signing on the SMB
connection.

Acked-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2007-06-28 18:41:42 +00:00
parent 467a8f8d48
commit 762e5ab77c
2 changed files with 29 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
fs/cifs/cifs_debug.c
View File

@ -901,90 +901,14 @@ security_flags_write(struct file *file, const char __user *buffer,
}
/* flags look ok - update the global security flags for cifs module */
extended_security = flags;
if (extended_security & CIFSSEC_MUST_SIGN) {
/* requiring signing implies signing is allowed */
extended_security |= CIFSSEC_MAY_SIGN;
cFYI(1, ("packet signing now required"));
} else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
cFYI(1, ("packet signing disabled"));
}
/* BB should we turn on MAY flags for other MUST options? */
return count;
}
/* static int
ntlmv2_enabled_read(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int len;
len = sprintf(page, "%d\n", ntlmv2_support);
len -= off;
*start = page + off;
if (len > count)
len = count;
else
*eof = 1;
if (len < 0)
len = 0;
return len;
}
static int
ntlmv2_enabled_write(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
char c;
int rc;
rc = get_user(c, buffer);
if (rc)
return rc;
if (c == '0' || c == 'n' || c == 'N')
ntlmv2_support = 0;
else if (c == '1' || c == 'y' || c == 'Y')
ntlmv2_support = 1;
else if (c == '2')
ntlmv2_support = 2;
return count;
}
static int
packet_signing_enabled_read(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int len;
len = sprintf(page, "%d\n", sign_CIFS_PDUs);
len -= off;
*start = page + off;
if (len > count)
len = count;
else
*eof = 1;
if (len < 0)
len = 0;
return len;
}
static int
packet_signing_enabled_write(struct file *file, const char __user *buffer,
unsigned long count, void *data)
{
char c;
int rc;
rc = get_user(c, buffer);
if (rc)
return rc;
if (c == '0' || c == 'n' || c == 'N')
sign_CIFS_PDUs = 0;
else if (c == '1' || c == 'y' || c == 'Y')
sign_CIFS_PDUs = 1;
else if (c == '2')
sign_CIFS_PDUs = 2;
return count;
} */
#endif

32
fs/cifs/cifssmb.c
View File

@ -426,11 +426,11 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
/* if any of auth flags (ie not sign or seal) are overriden use them */
if(ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
secFlags = ses->overrideSecFlg;
secFlags = ses->overrideSecFlg; /* BB FIXME fix sign flags? */
else /* if override flags set only sign/seal OR them with global auth */
secFlags = extended_security | ses->overrideSecFlg;
cFYI(1,("secFlags 0x%x",secFlags));
cFYI(1, ("secFlags 0x%x", secFlags));
pSMB->hdr.Mid = GetNextMid(server);
pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
@ -633,22 +633,32 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
#ifdef CONFIG_CIFS_WEAK_PW_HASH
signing_check:
#endif
if(sign_CIFS_PDUs == FALSE) {
if ((secFlags & CIFSSEC_MAY_SIGN) == 0) {
/* MUST_SIGN already includes the MAY_SIGN FLAG
so if this is zero it means that signing is disabled */
cFYI(1, ("Signing disabled"));
if(server->secMode & SECMODE_SIGN_REQUIRED)
cERROR(1,("Server requires "
"/proc/fs/cifs/PacketSigningEnabled to be on"));
cERROR(1, ("Server requires "
"/proc/fs/cifs/PacketSigningEnabled "
"to be on"));
server->secMode &=
~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
} else if(sign_CIFS_PDUs == 1) {
} else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
/* signing required */
cFYI(1, ("Must sign - segFlags 0x%x", secFlags));
if ((server->secMode &
(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
cERROR(1,
("signing required but server lacks support"));
} else
server->secMode |= SECMODE_SIGN_REQUIRED;
} else {
/* signing optional ie CIFSSEC_MAY_SIGN */
if((server->secMode & SECMODE_SIGN_REQUIRED) == 0)
server->secMode &=
~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
} else if(sign_CIFS_PDUs == 2) {
if((server->secMode &
(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
cERROR(1,("signing required but server lacks support"));
}
}
neg_err_exit:
cifs_buf_release(pSMB);