void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
#ifdef CONFIG_CIFS_STATS2
__le16 command = midEntry->server->vals->lock_cmd;
unsigned long now;
#endif
midEntry->mid_state = MID_FREE;
atomic_dec(&midCount);
if (midEntry->large_buf)
cifs_buf_release(midEntry->resp_buf);
else
cifs_small_buf_release(midEntry->resp_buf);
#ifdef CONFIG_CIFS_STATS2
now = jiffies;
/* commands taking longer than one second are indications that
something is wrong, unless it is quite a slow link or server */
if ((now - midEntry->when_alloc) > HZ) {
if ((cifsFYI & CIFS_TIMER) && (midEntry->command != command)) {
pr_debug(" CIFS slow rsp: cmd %d mid %llu",
midEntry->command, midEntry->mid);
pr_info(" A: 0x%lx S: 0x%lx R: 0x%lx\n",
now - midEntry->when_alloc,
now - midEntry->when_sent,
now - midEntry->when_received);
}
}
#endif
mempool_free(midEntry, cifs_mid_poolp);
}
static void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
#ifdef CONFIG_CIFS_STATS2
unsigned long now;
#endif
spin_lock(&GlobalMid_Lock);
midEntry->midState = MID_FREE;
list_del(&midEntry->qhead);
atomic_dec(&midCount);
spin_unlock(&GlobalMid_Lock);
if (midEntry->largeBuf)
cifs_buf_release(midEntry->resp_buf);
else
cifs_small_buf_release(midEntry->resp_buf);
#ifdef CONFIG_CIFS_STATS2
now = jiffies;
/* commands taking longer than one second are indications that
something is wrong, unless it is quite a slow link or server */
if ((now - midEntry->when_alloc) > HZ) {
if ((cifsFYI & CIFS_TIMER) &&
(midEntry->command != SMB_COM_LOCKING_ANDX)) {
printk(KERN_DEBUG " CIFS slow rsp: cmd %d mid %d",
midEntry->command, midEntry->mid);
printk(" A: 0x%lx S: 0x%lx R: 0x%lx\n",
now - midEntry->when_alloc,
now - midEntry->when_sent,
now - midEntry->when_received);
}
}
#endif
mempool_free(midEntry, cifs_mid_poolp);
}
void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
spin_lock(&GlobalMid_Lock);
midEntry->midState = MID_FREE;
list_del(&midEntry->qhead);
atomic_dec(&midCount);
spin_unlock(&GlobalMid_Lock);
cifs_buf_release(midEntry->resp_buf);
mempool_free(midEntry, cifs_mid_poolp);
}
void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
#ifdef CONFIG_CIFS_STATS2
__le16 command = midEntry->server->vals->lock_cmd;
unsigned long now;
#endif
midEntry->mid_state = MID_FREE;
atomic_dec(&midCount);
if (midEntry->large_buf)
cifs_buf_release(midEntry->resp_buf);
else
cifs_small_buf_release(midEntry->resp_buf);
#ifdef CONFIG_CIFS_STATS2
now = jiffies;
/*
* commands taking longer than one second (default) can be indications
* that something is wrong, unless it is quite a slow link or a very
* busy server. Note that this calc is unlikely or impossible to wrap
* as long as slow_rsp_threshold is not set way above recommended max
* value (32767 ie 9 hours) and is generally harmless even if wrong
* since only affects debug counters - so leaving the calc as simple
* comparison rather than doing multiple conversions and overflow
* checks
*/
if ((slow_rsp_threshold != 0) &&
time_after(now, midEntry->when_alloc + (slow_rsp_threshold * HZ)) &&
(midEntry->command != command)) {
/*
* smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command
* NB: le16_to_cpu returns unsigned so can not be negative below
*/
if (le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS)
cifs_stats_inc(&midEntry->server->smb2slowcmd[le16_to_cpu(midEntry->command)]);
trace_smb3_slow_rsp(le16_to_cpu(midEntry->command),
midEntry->mid, midEntry->pid,
midEntry->when_sent, midEntry->when_received);
if (cifsFYI & CIFS_TIMER) {
pr_debug(" CIFS slow rsp: cmd %d mid %llu",
midEntry->command, midEntry->mid);
cifs_info(" A: 0x%lx S: 0x%lx R: 0x%lx\n",
now - midEntry->when_alloc,
now - midEntry->when_sent,
now - midEntry->when_received);
}
}
#endif
cifs_mid_q_entry_release(midEntry);
}
void
DeleteMidQEntry(struct mid_q_entry *midEntry)
{
#ifdef CONFIG_CIFS_STATS2
__le16 command = midEntry->server->vals->lock_cmd;
unsigned long now;
#endif
midEntry->mid_state = MID_FREE;
atomic_dec(&midCount);
if (midEntry->large_buf)
cifs_buf_release(midEntry->resp_buf);
else
cifs_small_buf_release(midEntry->resp_buf);
#ifdef CONFIG_CIFS_STATS2
now = jiffies;
/* commands taking longer than one second are indications that
something is wrong, unless it is quite a slow link or server */
if (time_after(now, midEntry->when_alloc + HZ) &&
(midEntry->command != command)) {
/* smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command */
if ((le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS) &&
(le16_to_cpu(midEntry->command) >= 0))
cifs_stats_inc(&midEntry->server->smb2slowcmd[le16_to_cpu(midEntry->command)]);
trace_smb3_slow_rsp(le16_to_cpu(midEntry->command),
midEntry->mid, midEntry->pid,
midEntry->when_sent, midEntry->when_received);
if (cifsFYI & CIFS_TIMER) {
pr_debug(" CIFS slow rsp: cmd %d mid %llu",
midEntry->command, midEntry->mid);
pr_info(" A: 0x%lx S: 0x%lx R: 0x%lx\n",
now - midEntry->when_alloc,
now - midEntry->when_sent,
now - midEntry->when_received);
}
}
#endif
cifs_mid_q_entry_release(midEntry);
}
/* We start counting in the buffer with entry 2 and increment for every
entry (do not increment for . or .. entry) */
static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
struct file *file, char **ppCurrentEntry, int *num_to_ret)
{
int rc = 0;
int pos_in_buf = 0;
loff_t first_entry_in_buffer;
loff_t index_to_find = file->f_pos;
struct cifsFileInfo *cifsFile = file->private_data;
/* check if index in the buffer */
if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
(num_to_ret == NULL))
return -ENOENT;
*ppCurrentEntry = NULL;
first_entry_in_buffer =
cifsFile->srch_inf.index_of_last_entry -
cifsFile->srch_inf.entries_in_buffer;
/* if first entry in buf is zero then is first buffer
in search response data which means it is likely . and ..
will be in this buffer, although some servers do not return
. and .. for the root of a drive and for those we need
to start two entries earlier */
dump_cifs_file_struct(file, "In fce ");
if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
is_dir_changed(file)) ||
(index_to_find < first_entry_in_buffer)) {
/* close and restart search */
cFYI(1, ("search backing up - close and restart search"));
write_lock(&GlobalSMBSeslock);
if (!cifsFile->srch_inf.endOfSearch &&
!cifsFile->invalidHandle) {
cifsFile->invalidHandle = true;
write_unlock(&GlobalSMBSeslock);
CIFSFindClose(xid, pTcon, cifsFile->netfid);
} else
write_unlock(&GlobalSMBSeslock);
if (cifsFile->srch_inf.ntwrk_buf_start) {
cFYI(1, ("freeing SMB ff cache buf on search rewind"));
if (cifsFile->srch_inf.smallBuf)
cifs_small_buf_release(cifsFile->srch_inf.
ntwrk_buf_start);
else
cifs_buf_release(cifsFile->srch_inf.
ntwrk_buf_start);
cifsFile->srch_inf.ntwrk_buf_start = NULL;
}
rc = initiate_cifs_search(xid, file);
if (rc) {
cFYI(1, ("error %d reinitiating a search on rewind",
rc));
return rc;
}
cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
}
while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
(rc == 0) && !cifsFile->srch_inf.endOfSearch) {
cFYI(1, ("calling findnext2"));
rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
&cifsFile->srch_inf);
cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
if (rc)
return -ENOENT;
}
if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
/* we found the buffer that contains the entry */
/* scan and find it */
int i;
char *current_entry;
char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
current_entry = cifsFile->srch_inf.srch_entries_start;
first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
- cifsFile->srch_inf.entries_in_buffer;
pos_in_buf = index_to_find - first_entry_in_buffer;
cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
/* go entry by entry figuring out which is first */
current_entry = nxt_dir_entry(current_entry, end_of_smb,
cifsFile->srch_inf.info_level);
}
if ((current_entry == NULL) && (i < pos_in_buf)) {
/* BB fixme - check if we should flag this error */
cERROR(1, ("reached end of buf searching for pos in buf"
" %d index to find %lld rc %d",
pos_in_buf, index_to_find, rc));
}
rc = 0;
*ppCurrentEntry = current_entry;
} else {
cFYI(1, ("index not in buffer - could not findnext into it"));
return 0;
}
if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
cFYI(1, ("can not return entries pos_in_buf beyond last"));
*num_to_ret = 0;
} else
*num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
return rc;
}
/*
* Find the corresponding entry in the search. Note that the SMB server returns
* search entries for . and .. which complicates logic here if we choose to
* parse for them and we do not assume that they are located in the findfirst
* return buffer. We start counting in the buffer with entry 2 and increment for
* every entry (do not increment for . or .. entry).
*/
static int
find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
struct file *file, char **current_entry, int *num_to_ret)
{
__u16 search_flags;
int rc = 0;
int pos_in_buf = 0;
loff_t first_entry_in_buffer;
loff_t index_to_find = pos;
struct cifsFileInfo *cfile = file->private_data;
struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
struct TCP_Server_Info *server = tcon->ses->server;
/* check if index in the buffer */
if (!server->ops->query_dir_first || !server->ops->query_dir_next)
return -ENOSYS;
if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
return -ENOENT;
*current_entry = NULL;
first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
cfile->srch_inf.entries_in_buffer;
/*
* If first entry in buf is zero then is first buffer
* in search response data which means it is likely . and ..
* will be in this buffer, although some servers do not return
* . and .. for the root of a drive and for those we need
* to start two entries earlier.
*/
dump_cifs_file_struct(file, "In fce ");
if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
/* close and restart search */
cifs_dbg(FYI, "search backing up - close and restart search\n");
spin_lock(&cifs_file_list_lock);
if (server->ops->dir_needs_close(cfile)) {
cfile->invalidHandle = true;
spin_unlock(&cifs_file_list_lock);
if (server->ops->close_dir)
server->ops->close_dir(xid, tcon, &cfile->fid);
} else
spin_unlock(&cifs_file_list_lock);
if (cfile->srch_inf.ntwrk_buf_start) {
cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
if (cfile->srch_inf.smallBuf)
cifs_small_buf_release(cfile->srch_inf.
ntwrk_buf_start);
else
cifs_buf_release(cfile->srch_inf.
ntwrk_buf_start);
cfile->srch_inf.ntwrk_buf_start = NULL;
}
rc = initiate_cifs_search(xid, file);
if (rc) {
cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
rc);
return rc;
}
/* FindFirst/Next set last_entry to NULL on malformed reply */
if (cfile->srch_inf.last_entry)
cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
}
search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
if (backup_cred(cifs_sb))
search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
(rc == 0) && !cfile->srch_inf.endOfSearch) {
cifs_dbg(FYI, "calling findnext2\n");
rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
search_flags,
&cfile->srch_inf);
/* FindFirst/Next set last_entry to NULL on malformed reply */
if (cfile->srch_inf.last_entry)
cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
if (rc)
return -ENOENT;
}
if (index_to_find < cfile->srch_inf.index_of_last_entry) {
/* we found the buffer that contains the entry */
/* scan and find it */
int i;
char *cur_ent;
char *end_of_smb = cfile->srch_inf.ntwrk_buf_start +
server->ops->calc_smb_size(
cfile->srch_inf.ntwrk_buf_start);
cur_ent = cfile->srch_inf.srch_entries_start;
first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
- cfile->srch_inf.entries_in_buffer;
pos_in_buf = index_to_find - first_entry_in_buffer;
cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
/* go entry by entry figuring out which is first */
cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
cfile->srch_inf.info_level);
}
if ((cur_ent == NULL) && (i < pos_in_buf)) {
/* BB fixme - check if we should flag this error */
cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
pos_in_buf, index_to_find, rc);
}
rc = 0;
*current_entry = cur_ent;
} else {
cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
return 0;
}
if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
*num_to_ret = 0;
} else
*num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
return rc;
}
static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
struct file *file, char **ppCurrentEntry, int *num_to_ret)
{
int rc = 0;
int pos_in_buf = 0;
loff_t first_entry_in_buffer;
loff_t index_to_find = file->f_pos;
struct cifsFileInfo *cifsFile = file->private_data;
if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
(num_to_ret == NULL))
return -ENOENT;
*ppCurrentEntry = NULL;
first_entry_in_buffer =
cifsFile->srch_inf.index_of_last_entry -
cifsFile->srch_inf.entries_in_buffer;
dump_cifs_file_struct(file, "In fce ");
if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
is_dir_changed(file)) ||
(index_to_find < first_entry_in_buffer)) {
cFYI(1, "search backing up - close and restart search");
spin_lock(&cifs_file_list_lock);
if (!cifsFile->srch_inf.endOfSearch &&
!cifsFile->invalidHandle) {
cifsFile->invalidHandle = true;
spin_unlock(&cifs_file_list_lock);
CIFSFindClose(xid, pTcon, cifsFile->netfid);
} else
spin_unlock(&cifs_file_list_lock);
if (cifsFile->srch_inf.ntwrk_buf_start) {
cFYI(1, "freeing SMB ff cache buf on search rewind");
if (cifsFile->srch_inf.smallBuf)
cifs_small_buf_release(cifsFile->srch_inf.
ntwrk_buf_start);
else
cifs_buf_release(cifsFile->srch_inf.
ntwrk_buf_start);
cifsFile->srch_inf.ntwrk_buf_start = NULL;
}
rc = initiate_cifs_search(xid, file);
if (rc) {
cFYI(1, "error %d reinitiating a search on rewind",
rc);
return rc;
}
if (cifsFile->srch_inf.last_entry)
cifs_save_resume_key(cifsFile->srch_inf.last_entry,
cifsFile);
}
search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
if (backup_cred(cifs_sb))
search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
(rc == 0) && !cifsFile->srch_inf.endOfSearch) {
cFYI(1, "calling findnext2");
rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, search_flags,
&cifsFile->srch_inf);
if (cifsFile->srch_inf.last_entry)
cifs_save_resume_key(cifsFile->srch_inf.last_entry,
cifsFile);
if (rc)
return -ENOENT;
}
if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
int i;
char *current_entry;
char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
current_entry = cifsFile->srch_inf.srch_entries_start;
first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
- cifsFile->srch_inf.entries_in_buffer;
pos_in_buf = index_to_find - first_entry_in_buffer;
cFYI(1, "found entry - pos_in_buf %d", pos_in_buf);
for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
current_entry = nxt_dir_entry(current_entry, end_of_smb,
cifsFile->srch_inf.info_level);
}
if ((current_entry == NULL) && (i < pos_in_buf)) {
cERROR(1, "reached end of buf searching for pos in buf"
" %d index to find %lld rc %d",
pos_in_buf, index_to_find, rc);
}
rc = 0;
*ppCurrentEntry = current_entry;
} else {
cFYI(1, "index not in buffer - could not findnext into it");
return 0;
}
if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
cFYI(1, "can not return entries pos_in_buf beyond last");
*num_to_ret = 0;
} else
*num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
return rc;
}
int
CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
const struct nls_table *nls_cp)
{
int rc = 0;
int wct;
struct smb_hdr *smb_buf;
char *bcc_ptr;
char *str_area;
SESSION_SETUP_ANDX *pSMB;
__u32 capabilities;
int count;
int resp_buf_type;
struct kvec iov[3];
enum securityEnum type;
__u16 action;
int bytes_remaining;
struct key *spnego_key = NULL;
if (ses == NULL)
return -EINVAL;
type = ses->server->secType;
cFYI(1, ("sess setup type %d", type));
if (type == LANMAN) {
#ifndef CONFIG_CIFS_WEAK_PW_HASH
/* LANMAN and plaintext are less secure and off by default.
So we make this explicitly be turned on in kconfig (in the
build) and turned on at runtime (changed from the default)
in proc/fs/cifs or via mount parm. Unfortunately this is
needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
return -EOPNOTSUPP;
#endif
wct = 10; /* lanman 2 style sessionsetup */
} else if ((type == NTLM) || (type == NTLMv2)) {
/* For NTLMv2 failures eventually may need to retry NTLM */
wct = 13; /* old style NTLM sessionsetup */
} else /* same size: negotiate or auth, NTLMSSP or extended security */
wct = 12;
rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
(void **)&smb_buf);
if (rc)
return rc;
pSMB = (SESSION_SETUP_ANDX *)smb_buf;
capabilities = cifs_ssetup_hdr(ses, pSMB);
/* we will send the SMB in three pieces:
a fixed length beginning part, an optional
SPNEGO blob (which can be zero length), and a
last part which will include the strings
and rest of bcc area. This allows us to avoid
a large buffer 17K allocation */
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = smb_buf->smb_buf_length + 4;
/* setting this here allows the code at the end of the function
to free the request buffer if there's an error */
resp_buf_type = CIFS_SMALL_BUFFER;
/* 2000 big enough to fit max user, domain, NOS name etc. */
str_area = kmalloc(2000, GFP_KERNEL);
if (str_area == NULL) {
rc = -ENOMEM;
goto ssetup_exit;
}
bcc_ptr = str_area;
ses->flags &= ~CIFS_SES_LANMAN;
iov[1].iov_base = NULL;
iov[1].iov_len = 0;
if (type == LANMAN) {
#ifdef CONFIG_CIFS_WEAK_PW_HASH
char lnm_session_key[CIFS_SESS_KEY_SIZE];
/* no capabilities flags in old lanman negotiation */
pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
/* BB calculate hash with password */
/* and copy into bcc */
calc_lanman_hash(ses, lnm_session_key);
ses->flags |= CIFS_SES_LANMAN;
memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_SESS_KEY_SIZE);
bcc_ptr += CIFS_SESS_KEY_SIZE;
/* can not sign if LANMAN negotiated so no need
to calculate signing key? but what if server
changed to do higher than lanman dialect and
we reconnected would we ever calc signing_key? */
cFYI(1, ("Negotiating LANMAN setting up strings"));
/* Unicode not allowed for LANMAN dialects */
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
#endif
} else if (type == NTLM) {
char ntlm_session_key[CIFS_SESS_KEY_SIZE];
pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
pSMB->req_no_secext.CaseInsensitivePasswordLength =
cpu_to_le16(CIFS_SESS_KEY_SIZE);
pSMB->req_no_secext.CaseSensitivePasswordLength =
cpu_to_le16(CIFS_SESS_KEY_SIZE);
/* calculate session key */
SMBNTencrypt(ses->password, ses->server->cryptKey,
ntlm_session_key);
if (first_time) /* should this be moved into common code
with similar ntlmv2 path? */
cifs_calculate_mac_key(&ses->server->mac_signing_key,
ntlm_session_key, ses->password);
/* copy session key */
memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
bcc_ptr += CIFS_SESS_KEY_SIZE;
memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE);
bcc_ptr += CIFS_SESS_KEY_SIZE;
if (ses->capabilities & CAP_UNICODE) {
/* unicode strings must be word aligned */
if (iov[0].iov_len % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else if (type == NTLMv2) {
char *v2_sess_key =
kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL);
/* BB FIXME change all users of v2_sess_key to
struct ntlmv2_resp */
if (v2_sess_key == NULL) {
rc = -ENOMEM;
goto ssetup_exit;
}
pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
/* LM2 password would be here if we supported it */
pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
/* cpu_to_le16(LM2_SESS_KEY_SIZE); */
pSMB->req_no_secext.CaseSensitivePasswordLength =
cpu_to_le16(sizeof(struct ntlmv2_resp));
/* calculate session key */
setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
if (first_time) /* should this be moved into common code
with similar ntlmv2 path? */
/* cifs_calculate_ntlmv2_mac_key(ses->server->mac_signing_key,
response BB FIXME, v2_sess_key); */
/* copy session key */
/* memcpy(bcc_ptr, (char *)ntlm_session_key,LM2_SESS_KEY_SIZE);
bcc_ptr += LM2_SESS_KEY_SIZE; */
memcpy(bcc_ptr, (char *)v2_sess_key,
sizeof(struct ntlmv2_resp));
bcc_ptr += sizeof(struct ntlmv2_resp);
kfree(v2_sess_key);
if (ses->capabilities & CAP_UNICODE) {
if (iov[0].iov_len % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else if (type == Kerberos) {
#ifdef CONFIG_CIFS_UPCALL
struct cifs_spnego_msg *msg;
spnego_key = cifs_get_spnego_key(ses);
if (IS_ERR(spnego_key)) {
rc = PTR_ERR(spnego_key);
spnego_key = NULL;
goto ssetup_exit;
}
msg = spnego_key->payload.data;
/* bail out if key is too long */
if (msg->sesskey_len >
sizeof(ses->server->mac_signing_key.data.krb5)) {
cERROR(1, ("Kerberos signing key too long (%u bytes)",
msg->sesskey_len));
rc = -EOVERFLOW;
goto ssetup_exit;
}
if (first_time) {
ses->server->mac_signing_key.len = msg->sesskey_len;
memcpy(ses->server->mac_signing_key.data.krb5,
msg->data, msg->sesskey_len);
}
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
capabilities |= CAP_EXTENDED_SECURITY;
pSMB->req.Capabilities = cpu_to_le32(capabilities);
iov[1].iov_base = msg->data + msg->sesskey_len;
iov[1].iov_len = msg->secblob_len;
pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
if (ses->capabilities & CAP_UNICODE) {
/* unicode strings must be word aligned */
if ((iov[0].iov_len + iov[1].iov_len) % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_oslm_strings(&bcc_ptr, nls_cp);
unicode_domain_string(&bcc_ptr, ses, nls_cp);
} else
/* BB: is this right? */
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
#else /* ! CONFIG_CIFS_UPCALL */
cERROR(1, ("Kerberos negotiated but upcall support disabled!"));
rc = -ENOSYS;
goto ssetup_exit;
#endif /* CONFIG_CIFS_UPCALL */
} else {
cERROR(1, ("secType %d not supported!", type));
rc = -ENOSYS;
goto ssetup_exit;
}
iov[2].iov_base = str_area;
iov[2].iov_len = (long) bcc_ptr - (long) str_area;
count = iov[1].iov_len + iov[2].iov_len;
smb_buf->smb_buf_length += count;
BCC_LE(smb_buf) = cpu_to_le16(count);
rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
/* SMB request buf freed in SendReceive2 */
cFYI(1, ("ssetup rc from sendrecv2 is %d", rc));
if (rc)
goto ssetup_exit;
pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
smb_buf = (struct smb_hdr *)iov[0].iov_base;
if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
rc = -EIO;
cERROR(1, ("bad word count %d", smb_buf->WordCount));
goto ssetup_exit;
}
action = le16_to_cpu(pSMB->resp.Action);
if (action & GUEST_LOGIN)
cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
cFYI(1, ("UID = %d ", ses->Suid));
/* response can have either 3 or 4 word count - Samba sends 3 */
/* and lanman response is 3 */
bytes_remaining = BCC(smb_buf);
bcc_ptr = pByteArea(smb_buf);
if (smb_buf->WordCount == 4) {
__u16 blob_len;
blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
bcc_ptr += blob_len;
if (blob_len > bytes_remaining) {
cERROR(1, ("bad security blob length %d", blob_len));
rc = -EINVAL;
goto ssetup_exit;
}
bytes_remaining -= blob_len;
}
/* BB check if Unicode and decode strings */
if (smb_buf->Flags2 & SMBFLG2_UNICODE)
rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
else
rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
ssetup_exit:
if (spnego_key)
key_put(spnego_key);
kfree(str_area);
if (resp_buf_type == CIFS_SMALL_BUFFER) {
cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base));
cifs_small_buf_release(iov[0].iov_base);
} else if (resp_buf_type == CIFS_LARGE_BUFFER)
cifs_buf_release(iov[0].iov_base);
return rc;
}
/* We start counting in the buffer with entry 2 and increment for every
entry (do not increment for . or .. entry) */
static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
struct file *file, char **ppCurrentEntry, int *num_to_ret)
{
int rc = 0;
int pos_in_buf = 0;
loff_t first_entry_in_buffer;
loff_t index_to_find = file->f_pos;
struct cifsFileInfo * cifsFile = file->private_data;
/* check if index in the buffer */
if((cifsFile == NULL) || (ppCurrentEntry == NULL) || (num_to_ret == NULL))
return -ENOENT;
*ppCurrentEntry = NULL;
first_entry_in_buffer =
cifsFile->srch_inf.index_of_last_entry -
cifsFile->srch_inf.entries_in_buffer;
/* dump_cifs_file_struct(file, "In fce ");*/
if(index_to_find < first_entry_in_buffer) {
/* close and restart search */
cFYI(1,("search backing up - close and restart search"));
cifsFile->invalidHandle = TRUE;
CIFSFindClose(xid, pTcon, cifsFile->netfid);
kfree(cifsFile->search_resume_name);
cifsFile->search_resume_name = NULL;
if(cifsFile->srch_inf.ntwrk_buf_start) {
cFYI(1,("freeing SMB ff cache buf on search rewind"));
cifs_buf_release(cifsFile->srch_inf.ntwrk_buf_start);
}
rc = initiate_cifs_search(xid,file);
if(rc) {
cFYI(1,("error %d reinitiating a search on rewind",rc));
return rc;
}
}
while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
(rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
cFYI(1,("calling findnext2"));
rc = CIFSFindNext(xid,pTcon,cifsFile->netfid, &cifsFile->srch_inf);
if(rc)
return -ENOENT;
}
if(index_to_find < cifsFile->srch_inf.index_of_last_entry) {
/* we found the buffer that contains the entry */
/* scan and find it */
int i;
char * current_entry;
char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
smbCalcSize((struct smb_hdr *)
cifsFile->srch_inf.ntwrk_buf_start);
/* dump_cifs_file_struct(file,"found entry in fce "); */
first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
- cifsFile->srch_inf.entries_in_buffer;
pos_in_buf = index_to_find - first_entry_in_buffer;
cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
current_entry = cifsFile->srch_inf.srch_entries_start;
for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
/* go entry to next entry figuring out which we need to start with */
/* if( . or ..)
skip */
rc = cifs_entry_is_dot(current_entry,cifsFile);
if(rc == 1) /* is . or .. so skip */ {
cFYI(1,("Entry is .")); /* BB removeme BB */
/* continue; */
} else if (rc == 2 ) {
cFYI(1,("Entry is ..")); /* BB removeme BB */
/* continue; */
}
current_entry = nxt_dir_entry(current_entry,end_of_smb);
}
if((current_entry == NULL) && (i < pos_in_buf)) {
/* BB fixme - check if we should flag this error */
cERROR(1,("reached end of buf searching for pos in buf"
" %d index to find %lld rc %d",
pos_in_buf,index_to_find,rc));
}
rc = 0;
*ppCurrentEntry = current_entry;
} else {
cFYI(1,("index not in buffer - could not findnext into it"));
return 0;
}
if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
cFYI(1,("can not return entries when pos_in_buf beyond last entry"));
*num_to_ret = 0;
} else
*num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
/* dump_cifs_file_struct(file, "end fce ");*/
return rc;
}
int
CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
const struct nls_table *nls_cp)
{
int rc = 0;
int wct;
struct smb_hdr *smb_buf;
char *bcc_ptr;
char *str_area;
SESSION_SETUP_ANDX *pSMB;
__u32 capabilities;
__u16 count;
int resp_buf_type;
struct kvec iov[3];
enum securityEnum type;
__u16 action, bytes_remaining;
struct key *spnego_key = NULL;
__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
u16 blob_len;
char *ntlmsspblob = NULL;
if (ses == NULL) {
WARN(1, "%s: ses == NULL!", __func__);
return -EINVAL;
}
type = select_sectype(ses->server, ses->sectype);
cifs_dbg(FYI, "sess setup type %d\n", type);
if (type == Unspecified) {
cifs_dbg(VFS,
"Unable to select appropriate authentication method!");
return -EINVAL;
}
if (type == RawNTLMSSP) {
/* if memory allocation is successful, caller of this function
* frees it.
*/
ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
if (!ses->ntlmssp)
return -ENOMEM;
ses->ntlmssp->sesskey_per_smbsess = false;
}
ssetup_ntlmssp_authenticate:
if (phase == NtLmChallenge)
phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
if (type == LANMAN) {
#ifndef CONFIG_CIFS_WEAK_PW_HASH
/* LANMAN and plaintext are less secure and off by default.
So we make this explicitly be turned on in kconfig (in the
build) and turned on at runtime (changed from the default)
in proc/fs/cifs or via mount parm. Unfortunately this is
needed for old Win (e.g. Win95), some obscure NAS and OS/2 */
return -EOPNOTSUPP;
#endif
wct = 10; /* lanman 2 style sessionsetup */
} else if ((type == NTLM) || (type == NTLMv2)) {
/* For NTLMv2 failures eventually may need to retry NTLM */
wct = 13; /* old style NTLM sessionsetup */
} else /* same size: negotiate or auth, NTLMSSP or extended security */
wct = 12;
rc = small_smb_init_no_tc(SMB_COM_SESSION_SETUP_ANDX, wct, ses,
(void **)&smb_buf);
if (rc)
return rc;
pSMB = (SESSION_SETUP_ANDX *)smb_buf;
capabilities = cifs_ssetup_hdr(ses, pSMB);
/* we will send the SMB in three pieces:
a fixed length beginning part, an optional
SPNEGO blob (which can be zero length), and a
last part which will include the strings
and rest of bcc area. This allows us to avoid
a large buffer 17K allocation */
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = be32_to_cpu(smb_buf->smb_buf_length) + 4;
/* setting this here allows the code at the end of the function
to free the request buffer if there's an error */
resp_buf_type = CIFS_SMALL_BUFFER;
/* 2000 big enough to fit max user, domain, NOS name etc. */
str_area = kmalloc(2000, GFP_KERNEL);
if (str_area == NULL) {
rc = -ENOMEM;
goto ssetup_exit;
}
bcc_ptr = str_area;
iov[1].iov_base = NULL;
iov[1].iov_len = 0;
if (type == LANMAN) {
#ifdef CONFIG_CIFS_WEAK_PW_HASH
char lnm_session_key[CIFS_AUTH_RESP_SIZE];
pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;
/* no capabilities flags in old lanman negotiation */
pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
/* Calculate hash with password and copy into bcc_ptr.
* Encryption Key (stored as in cryptkey) gets used if the
* security mode bit in Negottiate Protocol response states
* to use challenge/response method (i.e. Password bit is 1).
*/
rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
true : false, lnm_session_key);
memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
bcc_ptr += CIFS_AUTH_RESP_SIZE;
/* can not sign if LANMAN negotiated so no need
to calculate signing key? but what if server
changed to do higher than lanman dialect and
we reconnected would we ever calc signing_key? */
cifs_dbg(FYI, "Negotiating LANMAN setting up strings\n");
/* Unicode not allowed for LANMAN dialects */
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
#endif
} else if (type == NTLM) {
pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
pSMB->req_no_secext.CaseInsensitivePasswordLength =
cpu_to_le16(CIFS_AUTH_RESP_SIZE);
pSMB->req_no_secext.CaseSensitivePasswordLength =
cpu_to_le16(CIFS_AUTH_RESP_SIZE);
/* calculate ntlm response and session key */
rc = setup_ntlm_response(ses, nls_cp);
if (rc) {
cifs_dbg(VFS, "Error %d during NTLM authentication\n",
rc);
goto ssetup_exit;
}
/* copy ntlm response */
memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
CIFS_AUTH_RESP_SIZE);
bcc_ptr += CIFS_AUTH_RESP_SIZE;
memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
CIFS_AUTH_RESP_SIZE);
bcc_ptr += CIFS_AUTH_RESP_SIZE;
if (ses->capabilities & CAP_UNICODE) {
/* unicode strings must be word aligned */
if (iov[0].iov_len % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else if (type == NTLMv2) {
pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
/* LM2 password would be here if we supported it */
pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
/* calculate nlmv2 response and session key */
rc = setup_ntlmv2_rsp(ses, nls_cp);
if (rc) {
cifs_dbg(VFS, "Error %d during NTLMv2 authentication\n",
rc);
goto ssetup_exit;
}
memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
ses->auth_key.len - CIFS_SESS_KEY_SIZE);
bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
/* set case sensitive password length after tilen may get
* assigned, tilen is 0 otherwise.
*/
pSMB->req_no_secext.CaseSensitivePasswordLength =
cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
if (ses->capabilities & CAP_UNICODE) {
if (iov[0].iov_len % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else if (type == Kerberos) {
#ifdef CONFIG_CIFS_UPCALL
struct cifs_spnego_msg *msg;
spnego_key = cifs_get_spnego_key(ses);
if (IS_ERR(spnego_key)) {
rc = PTR_ERR(spnego_key);
spnego_key = NULL;
goto ssetup_exit;
}
msg = spnego_key->payload.data;
/* check version field to make sure that cifs.upcall is
sending us a response in an expected form */
if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
cifs_dbg(VFS, "incorrect version of cifs.upcall "
"expected %d but got %d)",
CIFS_SPNEGO_UPCALL_VERSION, msg->version);
rc = -EKEYREJECTED;
goto ssetup_exit;
}
ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
GFP_KERNEL);
if (!ses->auth_key.response) {
cifs_dbg(VFS,
"Kerberos can't allocate (%u bytes) memory",
msg->sesskey_len);
rc = -ENOMEM;
goto ssetup_exit;
}
ses->auth_key.len = msg->sesskey_len;
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
capabilities |= CAP_EXTENDED_SECURITY;
pSMB->req.Capabilities = cpu_to_le32(capabilities);
iov[1].iov_base = msg->data + msg->sesskey_len;
iov[1].iov_len = msg->secblob_len;
pSMB->req.SecurityBlobLength = cpu_to_le16(iov[1].iov_len);
if (ses->capabilities & CAP_UNICODE) {
/* unicode strings must be word aligned */
if ((iov[0].iov_len + iov[1].iov_len) % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_oslm_strings(&bcc_ptr, nls_cp);
unicode_domain_string(&bcc_ptr, ses, nls_cp);
} else
/* BB: is this right? */
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
#else /* ! CONFIG_CIFS_UPCALL */
cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
rc = -ENOSYS;
goto ssetup_exit;
#endif /* CONFIG_CIFS_UPCALL */
} else if (type == RawNTLMSSP) {
if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
cifs_dbg(VFS, "NTLMSSP requires Unicode support\n");
rc = -ENOSYS;
goto ssetup_exit;
}
cifs_dbg(FYI, "ntlmssp session setup phase %d\n", phase);
pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
capabilities |= CAP_EXTENDED_SECURITY;
pSMB->req.Capabilities |= cpu_to_le32(capabilities);
switch(phase) {
case NtLmNegotiate:
build_ntlmssp_negotiate_blob(
pSMB->req.SecurityBlob, ses);
iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
iov[1].iov_base = pSMB->req.SecurityBlob;
pSMB->req.SecurityBlobLength =
cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
break;
case NtLmAuthenticate:
/*
* 5 is an empirical value, large enough to hold
* authenticate message plus max 10 of av paris,
* domain, user, workstation names, flags, etc.
*/
ntlmsspblob = kzalloc(
5*sizeof(struct _AUTHENTICATE_MESSAGE),
GFP_KERNEL);
if (!ntlmsspblob) {
rc = -ENOMEM;
goto ssetup_exit;
}
rc = build_ntlmssp_auth_blob(ntlmsspblob,
&blob_len, ses, nls_cp);
if (rc)
goto ssetup_exit;
iov[1].iov_len = blob_len;
iov[1].iov_base = ntlmsspblob;
pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len);
/*
* Make sure that we tell the server that we are using
* the uid that it just gave us back on the response
* (challenge)
*/
smb_buf->Uid = ses->Suid;
break;
default:
cifs_dbg(VFS, "invalid phase %d\n", phase);
rc = -ENOSYS;
goto ssetup_exit;
}
/* unicode strings must be word aligned */
if ((iov[0].iov_len + iov[1].iov_len) % 2) {
*bcc_ptr = 0;
bcc_ptr++;
}
unicode_oslm_strings(&bcc_ptr, nls_cp);
} else {
cifs_dbg(VFS, "secType %d not supported!\n", type);
rc = -ENOSYS;
goto ssetup_exit;
}
iov[2].iov_base = str_area;
iov[2].iov_len = (long) bcc_ptr - (long) str_area;
count = iov[1].iov_len + iov[2].iov_len;
smb_buf->smb_buf_length =
cpu_to_be32(be32_to_cpu(smb_buf->smb_buf_length) + count);
put_bcc(count, smb_buf);
rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type,
CIFS_LOG_ERROR);
/* SMB request buf freed in SendReceive2 */
pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
smb_buf = (struct smb_hdr *)iov[0].iov_base;
if ((type == RawNTLMSSP) && (resp_buf_type != CIFS_NO_BUFFER) &&
(smb_buf->Status.CifsError ==
cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
if (phase != NtLmNegotiate) {
cifs_dbg(VFS, "Unexpected more processing error\n");
goto ssetup_exit;
}
/* NTLMSSP Negotiate sent now processing challenge (response) */
phase = NtLmChallenge; /* process ntlmssp challenge */
rc = 0; /* MORE_PROC rc is not an error here, but expected */
}
if (rc)
goto ssetup_exit;
if ((smb_buf->WordCount != 3) && (smb_buf->WordCount != 4)) {
rc = -EIO;
cifs_dbg(VFS, "bad word count %d\n", smb_buf->WordCount);
goto ssetup_exit;
}
action = le16_to_cpu(pSMB->resp.Action);
if (action & GUEST_LOGIN)
cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
ses->Suid = smb_buf->Uid; /* UID left in wire format (le) */
cifs_dbg(FYI, "UID = %llu\n", ses->Suid);
/* response can have either 3 or 4 word count - Samba sends 3 */
/* and lanman response is 3 */
bytes_remaining = get_bcc(smb_buf);
bcc_ptr = pByteArea(smb_buf);
if (smb_buf->WordCount == 4) {
blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
if (blob_len > bytes_remaining) {
cifs_dbg(VFS, "bad security blob length %d\n",
blob_len);
rc = -EINVAL;
goto ssetup_exit;
}
if (phase == NtLmChallenge) {
rc = decode_ntlmssp_challenge(bcc_ptr, blob_len, ses);
/* now goto beginning for ntlmssp authenticate phase */
if (rc)
goto ssetup_exit;
}
bcc_ptr += blob_len;
bytes_remaining -= blob_len;
}
/* BB check if Unicode and decode strings */
if (bytes_remaining == 0) {
/* no string area to decode, do nothing */
} else if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
/* unicode string area must be word-aligned */
if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
++bcc_ptr;
--bytes_remaining;
}
decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
} else {
decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
}
ssetup_exit:
if (spnego_key) {
key_invalidate(spnego_key);
key_put(spnego_key);
}
kfree(str_area);
kfree(ntlmsspblob);
ntlmsspblob = NULL;
if (resp_buf_type == CIFS_SMALL_BUFFER) {
cifs_dbg(FYI, "ssetup freeing small buf %p\n", iov[0].iov_base);
cifs_small_buf_release(iov[0].iov_base);
} else if (resp_buf_type == CIFS_LARGE_BUFFER)
cifs_buf_release(iov[0].iov_base);
/* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
if ((phase == NtLmChallenge) && (rc == 0))
goto ssetup_ntlmssp_authenticate;
if (!rc) {
mutex_lock(&ses->server->srv_mutex);
if (!ses->server->session_estab) {
if (ses->server->sign) {
ses->server->session_key.response =
kmemdup(ses->auth_key.response,
ses->auth_key.len, GFP_KERNEL);
if (!ses->server->session_key.response) {
rc = -ENOMEM;
mutex_unlock(&ses->server->srv_mutex);
goto keycp_exit;
}
ses->server->session_key.len =
ses->auth_key.len;
}
ses->server->sequence_number = 0x2;
ses->server->session_estab = true;
}
mutex_unlock(&ses->server->srv_mutex);
cifs_dbg(FYI, "CIFS session established successfully\n");
spin_lock(&GlobalMid_Lock);
ses->status = CifsGood;
ses->need_reconnect = false;
spin_unlock(&GlobalMid_Lock);
}
keycp_exit:
kfree(ses->auth_key.response);
ses->auth_key.response = NULL;
kfree(ses->ntlmssp);
return rc;
}
int CVE_2011_3191_linux2_6_34_2_CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
__u16 searchHandle, struct cifs_search_info *psrch_inf)
{
TRANSACTION2_FNEXT_REQ *pSMB = NULL;
TRANSACTION2_FNEXT_RSP *pSMBr = NULL;
T2_FNEXT_RSP_PARMS *parms;
char *response_data;
int rc = 0;
int bytes_returned, name_len;
__u16 params, byte_count;
cFYI(1, ("In FindNext"));
if (psrch_inf->endOfSearch)
return -ENOENT;
rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
(void **) &pSMBr);
if (rc)
return rc;
params = 14; /* includes 2 bytes of null string, converted to LE below*/
byte_count = 0;
pSMB->TotalDataCount = 0; /* no EAs */
pSMB->MaxParameterCount = cpu_to_le16(8);
pSMB->MaxDataCount =
cpu_to_le16((tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) &
0xFFFFFF00);
pSMB->MaxSetupCount = 0;
pSMB->Reserved = 0;
pSMB->Flags = 0;
pSMB->Timeout = 0;
pSMB->Reserved2 = 0;
pSMB->ParameterOffset = cpu_to_le16(
offsetof(struct smb_com_transaction2_fnext_req,SearchHandle) - 4);
pSMB->DataCount = 0;
pSMB->DataOffset = 0;
pSMB->SetupCount = 1;
pSMB->Reserved3 = 0;
pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT);
pSMB->SearchHandle = searchHandle; /* always kept as le */
pSMB->SearchCount =
cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
pSMB->ResumeKey = psrch_inf->resume_key;
pSMB->SearchFlags =
cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME);
name_len = psrch_inf->resume_name_len;
params += name_len;
if (name_len < PATH_MAX) {
memcpy(pSMB->ResumeFileName, psrch_inf->presume_name, name_len);
byte_count += name_len;
/* 14 byte parm len above enough for 2 byte null terminator */
pSMB->ResumeFileName[name_len] = 0;
pSMB->ResumeFileName[name_len+1] = 0;
} else {
rc = -EINVAL;
goto FNext2_err_exit;
}
byte_count = params + 1 /* pad */ ;
pSMB->TotalParameterCount = cpu_to_le16(params);
pSMB->ParameterCount = pSMB->TotalParameterCount;
pSMB->hdr.smb_buf_length += byte_count;
pSMB->ByteCount = cpu_to_le16(byte_count);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
cifs_stats_inc(&tcon->num_fnext);
if (rc) {
if (rc == -EBADF) {
psrch_inf->endOfSearch = true;
cifs_buf_release(pSMB);
rc = 0; /* search probably was closed at end of search*/
} else
cFYI(1, ("FindNext returned = %d", rc));
} else { /* decode response */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
if (rc == 0) {
unsigned int lnoff;
/* BB fixme add lock for file (srch_info) struct here */
if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
psrch_inf->unicode = true;
else
psrch_inf->unicode = false;
response_data = (char *) &pSMBr->hdr.Protocol +
le16_to_cpu(pSMBr->t2.ParameterOffset);
parms = (T2_FNEXT_RSP_PARMS *)response_data;
response_data = (char *)&pSMBr->hdr.Protocol +
le16_to_cpu(pSMBr->t2.DataOffset);
if (psrch_inf->smallBuf)
cifs_small_buf_release(
psrch_inf->ntwrk_buf_start);
else
cifs_buf_release(psrch_inf->ntwrk_buf_start);
psrch_inf->srch_entries_start = response_data;
psrch_inf->ntwrk_buf_start = (char *)pSMB;
psrch_inf->smallBuf = 0;
if (parms->EndofSearch)
psrch_inf->endOfSearch = true;
else
psrch_inf->endOfSearch = false;
psrch_inf->entries_in_buffer =
le16_to_cpu(parms->SearchCount);
psrch_inf->index_of_last_entry +=
psrch_inf->entries_in_buffer;
lnoff = le16_to_cpu(parms->LastNameOffset);
if (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE <
lnoff) {
cERROR(1, ("ignoring corrupt resume name"));
psrch_inf->last_entry = NULL;
return rc;
} else
psrch_inf->last_entry =
psrch_inf->srch_entries_start + lnoff;
/* cFYI(1,("fnxt2 entries in buf %d index_of_last %d",
psrch_inf->entries_in_buffer, psrch_inf->index_of_last_entry)); */
/* BB fixme add unlock here */
}
}
/* BB On error, should we leave previous search buf (and count and
last entry fields) intact or free the previous one? */
/* Note: On -EAGAIN error only caller can retry on handle based calls
since file handle passed in no longer valid */
FNext2_err_exit:
if (rc != 0)
cifs_buf_release(pSMB);
return rc;
}
