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Fix extended security auth failure 

Fix authentication failures using extended security mechanisms.
cifs client does not take into consideration extended security bit
in capabilities field in negotiate protocol response from the server.

Please refer to Samba bugzilla 8046.

Reported-and-tested by: Werner Maes <Werner.Maes@icts.kuleuven.be>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2011-05-27 04:12:29 +00:00
parent d4ffff1fa9
commit 07cc6cf9ef
1 changed files with 6 additions and 11 deletions
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17
fs/cifs/cifssmb.c
View File

@ -571,18 +571,10 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey,
CIFS_CRYPTO_KEY_SIZE);
} else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC)
&& (pSMBr->EncryptionKeyLength == 0)) {
} else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC ||
server->capabilities & CAP_EXTENDED_SECURITY) &&
(pSMBr->EncryptionKeyLength == 0)) {
/* decode security blob */
} else if (server->secMode & SECMODE_PW_ENCRYPT) {
rc = -EIO; /* no crypt key only if plain text pwd */
goto neg_err_exit;
}
/* BB might be helpful to save off the domain of server here */
if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC) &&
(server->capabilities & CAP_EXTENDED_SECURITY)) {
count = get_bcc(&pSMBr->hdr);
if (count < 16) {
rc = -EIO;
@ -625,6 +617,9 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
} else
rc = -EOPNOTSUPP;
}
} else if (server->secMode & SECMODE_PW_ENCRYPT) {
rc = -EIO; /* no crypt key only if plain text pwd */
goto neg_err_exit;
} else
server->capabilities &= ~CAP_EXTENDED_SECURITY;