*
* SMB/CIFS session setup handling routines
*
- * Copyright (c) International Business Machines Corp., 2006, 2007
+ * Copyright (c) International Business Machines Corp., 2006, 2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
* This library is free software; you can redistribute it and/or modify
#include "ntlmssp.h"
#include "nterr.h"
#include <linux/utsname.h>
+#include <linux/slab.h>
#include "cifs_spnego.h"
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
unsigned char *p24);
+/*
+ * Checks if this is the first smb session to be reconnected after
+ * the socket has been reestablished (so we know whether to use vc 0).
+ * Called while holding the cifs_tcp_ses_lock, so do not block
+ */
+static bool is_first_ses_reconnect(struct cifsSesInfo *ses)
+{
+ struct list_head *tmp;
+ struct cifsSesInfo *tmp_ses;
+
+ list_for_each(tmp, &ses->server->smb_ses_list) {
+ tmp_ses = list_entry(tmp, struct cifsSesInfo,
+ smb_ses_list);
+ if (tmp_ses->need_reconnect == false)
+ return false;
+ }
+ /* could not find a session that was already connected,
+ this must be the first one we are reconnecting */
+ return true;
+}
+
+/*
+ * vc number 0 is treated specially by some servers, and should be the
+ * first one we request. After that we can use vcnumbers up to maxvcs,
+ * one for each smb session (some Windows versions set maxvcs incorrectly
+ * so maxvc=1 can be ignored). If we have too many vcs, we can reuse
+ * any vc but zero (some servers reset the connection on vcnum zero)
+ *
+ */
+static __le16 get_next_vcnum(struct cifsSesInfo *ses)
+{
+ __u16 vcnum = 0;
+ struct list_head *tmp;
+ struct cifsSesInfo *tmp_ses;
+ __u16 max_vcs = ses->server->max_vcs;
+ __u16 i;
+ int free_vc_found = 0;
+
+ /* Quoting the MS-SMB specification: "Windows-based SMB servers set this
+ field to one but do not enforce this limit, which allows an SMB client
+ to establish more virtual circuits than allowed by this value ... but
+ other server implementations can enforce this limit." */
+ if (max_vcs < 2)
+ max_vcs = 0xFFFF;
+
+ write_lock(&cifs_tcp_ses_lock);
+ if ((ses->need_reconnect) && is_first_ses_reconnect(ses))
+ goto get_vc_num_exit; /* vcnum will be zero */
+ for (i = ses->server->srv_count - 1; i < max_vcs; i++) {
+ if (i == 0) /* this is the only connection, use vc 0 */
+ break;
+
+ free_vc_found = 1;
+
+ list_for_each(tmp, &ses->server->smb_ses_list) {
+ tmp_ses = list_entry(tmp, struct cifsSesInfo,
+ smb_ses_list);
+ if (tmp_ses->vcnum == i) {
+ free_vc_found = 0;
+ break; /* found duplicate, try next vcnum */
+ }
+ }
+ if (free_vc_found)
+ break; /* we found a vcnumber that will work - use it */
+ }
+
+ if (i == 0)
+ vcnum = 0; /* for most common case, ie if one smb session, use
+ vc zero. Also for case when no free vcnum, zero
+ is safest to send (some clients only send zero) */
+ else if (free_vc_found == 0)
+ vcnum = 1; /* we can not reuse vc=0 safely, since some servers
+ reset all uids on that, but 1 is ok. */
+ else
+ vcnum = i;
+ ses->vcnum = vcnum;
+get_vc_num_exit:
+ write_unlock(&cifs_tcp_ses_lock);
+
+ return cpu_to_le16(vcnum);
+}
+
static __u32 cifs_ssetup_hdr(struct cifsSesInfo *ses, SESSION_SETUP_ANDX *pSMB)
{
__u32 capabilities = 0;
/* init fields common to all four types of SessSetup */
- /* note that header is initialized to zero in header_assemble */
+ /* Note that offsets for first seven fields in req struct are same */
+ /* in CIFS Specs so does not matter which of 3 forms of struct */
+ /* that we use in next few lines */
+ /* Note that header is initialized to zero in header_assemble */
pSMB->req.AndXCommand = 0xFF;
pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
+ pSMB->req.VcNumber = get_next_vcnum(ses);
/* Now no need to set SMBFLG_CASELESS or obsolete CANONICAL PATH */
if (ses->capabilities & CAP_UNIX)
capabilities |= CAP_UNIX;
- /* BB check whether to init vcnum BB */
return capabilities;
}
/* null user mount */
*bcc_ptr = 0;
*(bcc_ptr+1) = 0;
- } else { /* 300 should be long enough for any conceivable user name */
+ } else {
bytes_ret = cifs_strtoUCS((__le16 *) bcc_ptr, ses->userName,
- 300, nls_cp);
+ MAX_USERNAME_SIZE, nls_cp);
}
bcc_ptr += 2 * bytes_ret;
bcc_ptr += 2; /* account for null termination */
/* copy user */
if (ses->userName == NULL) {
/* BB what about null user mounts - check that we do this BB */
- } else { /* 300 should be long enough for any conceivable user name */
- strncpy(bcc_ptr, ses->userName, 300);
+ } else {
+ strncpy(bcc_ptr, ses->userName, MAX_USERNAME_SIZE);
}
- /* BB improve check for overflow */
- bcc_ptr += strnlen(ses->userName, 300);
+ bcc_ptr += strnlen(ses->userName, MAX_USERNAME_SIZE);
*bcc_ptr = 0;
bcc_ptr++; /* account for null termination */
*pbcc_area = bcc_ptr;
}
-static int decode_unicode_ssetup(char **pbcc_area, int bleft,
- struct cifsSesInfo *ses,
- const struct nls_table *nls_cp)
+static void
+decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses,
+ const struct nls_table *nls_cp)
{
- int rc = 0;
- int words_left, len;
+ int len;
char *data = *pbcc_area;
-
-
- cFYI(1, ("bleft %d", bleft));
-
-
- /* SMB header is unaligned, so cifs servers word align start of
- Unicode strings */
- data++;
- bleft--; /* Windows servers do not always double null terminate
- their final Unicode string - in which case we
- now will not attempt to decode the byte of junk
- which follows it */
-
- words_left = bleft / 2;
-
- /* save off server operating system */
- len = UniStrnlen((wchar_t *) data, words_left);
-
-/* We look for obvious messed up bcc or strings in response so we do not go off
- the end since (at least) WIN2K and Windows XP have a major bug in not null
- terminating last Unicode string in response */
- if (len >= words_left)
- return rc;
+ cFYI(1, "bleft %d", bleft);
+
+ /*
+ * Windows servers do not always double null terminate their final
+ * Unicode string. Check to see if there are an uneven number of bytes
+ * left. If so, then add an extra NULL pad byte to the end of the
+ * response.
+ *
+ * See section 2.7.2 in "Implementing CIFS" for details
+ */
+ if (bleft % 2) {
+ data[bleft] = 0;
+ ++bleft;
+ }
kfree(ses->serverOS);
- /* UTF-8 string will not grow more than four times as big as UCS-16 */
- ses->serverOS = kzalloc(4 * len, GFP_KERNEL);
- if (ses->serverOS != NULL)
- cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp);
- data += 2 * (len + 1);
- words_left -= len + 1;
-
- /* save off server network operating system */
- len = UniStrnlen((wchar_t *) data, words_left);
-
- if (len >= words_left)
- return rc;
+ ses->serverOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
+ cFYI(1, "serverOS=%s", ses->serverOS);
+ len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
+ data += len;
+ bleft -= len;
+ if (bleft <= 0)
+ return;
kfree(ses->serverNOS);
- ses->serverNOS = kzalloc(4 * len, GFP_KERNEL); /* BB this is wrong length FIXME BB */
- if (ses->serverNOS != NULL) {
- cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len,
- nls_cp);
- if (strncmp(ses->serverNOS, "NT LAN Manager 4", 16) == 0) {
- cFYI(1, ("NT4 server"));
- ses->flags |= CIFS_SES_NT4;
- }
- }
- data += 2 * (len + 1);
- words_left -= len + 1;
-
- /* save off server domain */
- len = UniStrnlen((wchar_t *) data, words_left);
-
- if (len > words_left)
- return rc;
+ ses->serverNOS = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
+ cFYI(1, "serverNOS=%s", ses->serverNOS);
+ len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
+ data += len;
+ bleft -= len;
+ if (bleft <= 0)
+ return;
kfree(ses->serverDomain);
- ses->serverDomain = kzalloc(2 * (len + 1), GFP_KERNEL); /* BB FIXME wrong length */
- if (ses->serverDomain != NULL) {
- cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len,
- nls_cp);
- ses->serverDomain[2*len] = 0;
- ses->serverDomain[(2*len) + 1] = 0;
- }
- data += 2 * (len + 1);
- words_left -= len + 1;
+ ses->serverDomain = cifs_strndup_from_ucs(data, bleft, true, nls_cp);
+ cFYI(1, "serverDomain=%s", ses->serverDomain);
- cFYI(1, ("words left: %d", words_left));
-
- return rc;
+ return;
}
static int decode_ascii_ssetup(char **pbcc_area, int bleft,
int len;
char *bcc_ptr = *pbcc_area;
- cFYI(1, ("decode sessetup ascii. bleft %d", bleft));
+ cFYI(1, "decode sessetup ascii. bleft %d", bleft);
len = strnlen(bcc_ptr, bleft);
if (len >= bleft)
if (ses->serverOS)
strncpy(ses->serverOS, bcc_ptr, len);
if (strncmp(ses->serverOS, "OS/2", 4) == 0) {
- cFYI(1, ("OS/2 server"));
+ cFYI(1, "OS/2 server");
ses->flags |= CIFS_SES_OS2;
}
/* BB For newer servers which do not support Unicode,
but thus do return domain here we could add parsing
for it later, but it is not very important */
- cFYI(1, ("ascii: bytes left %d", bleft));
+ cFYI(1, "ascii: bytes left %d", bleft);
return rc;
}
+static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
+ struct cifsSesInfo *ses)
+{
+ CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
+
+ if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
+ cERROR(1, "challenge blob len %d too small", blob_len);
+ return -EINVAL;
+ }
+
+ if (memcmp(pblob->Signature, "NTLMSSP", 8)) {
+ cERROR(1, "blob signature incorrect %s", pblob->Signature);
+ return -EINVAL;
+ }
+ if (pblob->MessageType != NtLmChallenge) {
+ cERROR(1, "Incorrect message type %d", pblob->MessageType);
+ return -EINVAL;
+ }
+
+ memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
+ /* BB we could decode pblob->NegotiateFlags; some may be useful */
+ /* In particular we can examine sign flags */
+ /* BB spec says that if AvId field of MsvAvTimestamp is populated then
+ we must set the MIC field of the AUTHENTICATE_MESSAGE */
+
+ return 0;
+}
+
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+/* BB Move to ntlmssp.c eventually */
+
+/* We do not malloc the blob, it is passed in pbuffer, because
+ it is fixed size, and small, making this approach cleaner */
+static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
+ struct cifsSesInfo *ses)
+{
+ NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer;
+ __u32 flags;
+
+ memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
+ sec_blob->MessageType = NtLmNegotiate;
+
+ /* BB is NTLMV2 session security format easier to use here? */
+ flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
+ NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
+ NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
+ if (ses->server->secMode &
+ (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+ flags |= NTLMSSP_NEGOTIATE_SIGN;
+ if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
+ flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+
+ sec_blob->NegotiateFlags |= cpu_to_le32(flags);
+
+ sec_blob->WorkstationName.BufferOffset = 0;
+ sec_blob->WorkstationName.Length = 0;
+ sec_blob->WorkstationName.MaximumLength = 0;
+
+ /* Domain name is sent on the Challenge not Negotiate NTLMSSP request */
+ sec_blob->DomainName.BufferOffset = 0;
+ sec_blob->DomainName.Length = 0;
+ sec_blob->DomainName.MaximumLength = 0;
+}
+
+/* We do not malloc the blob, it is passed in pbuffer, because its
+ maximum possible size is fixed and small, making this approach cleaner.
+ This function returns the length of the data in the blob */
+static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
+ struct cifsSesInfo *ses,
+ const struct nls_table *nls_cp, bool first)
+{
+ AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer;
+ __u32 flags;
+ unsigned char *tmp;
+ char ntlm_session_key[CIFS_SESS_KEY_SIZE];
+
+ memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8);
+ sec_blob->MessageType = NtLmAuthenticate;
+
+ flags = NTLMSSP_NEGOTIATE_56 |
+ NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
+ NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
+ NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
+ if (ses->server->secMode &
+ (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+ flags |= NTLMSSP_NEGOTIATE_SIGN;
+ if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
+ flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+
+ tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE);
+ sec_blob->NegotiateFlags |= cpu_to_le32(flags);
+
+ sec_blob->LmChallengeResponse.BufferOffset =
+ cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE));
+ sec_blob->LmChallengeResponse.Length = 0;
+ sec_blob->LmChallengeResponse.MaximumLength = 0;
+
+ /* calculate session key, BB what about adding similar ntlmv2 path? */
+ SMBNTencrypt(ses->password, ses->server->cryptKey, ntlm_session_key);
+ if (first)
+ cifs_calculate_mac_key(&ses->server->mac_signing_key,
+ ntlm_session_key, ses->password);
+
+ memcpy(tmp, ntlm_session_key, CIFS_SESS_KEY_SIZE);
+ sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->NtChallengeResponse.Length = cpu_to_le16(CIFS_SESS_KEY_SIZE);
+ sec_blob->NtChallengeResponse.MaximumLength =
+ cpu_to_le16(CIFS_SESS_KEY_SIZE);
+
+ tmp += CIFS_SESS_KEY_SIZE;
+
+ if (ses->domainName == NULL) {
+ sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->DomainName.Length = 0;
+ sec_blob->DomainName.MaximumLength = 0;
+ tmp += 2;
+ } else {
+ int len;
+ len = cifs_strtoUCS((__le16 *)tmp, ses->domainName,
+ MAX_USERNAME_SIZE, nls_cp);
+ len *= 2; /* unicode is 2 bytes each */
+ len += 2; /* trailing null */
+ sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->DomainName.Length = cpu_to_le16(len);
+ sec_blob->DomainName.MaximumLength = cpu_to_le16(len);
+ tmp += len;
+ }
+
+ if (ses->userName == NULL) {
+ sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->UserName.Length = 0;
+ sec_blob->UserName.MaximumLength = 0;
+ tmp += 2;
+ } else {
+ int len;
+ len = cifs_strtoUCS((__le16 *)tmp, ses->userName,
+ MAX_USERNAME_SIZE, nls_cp);
+ len *= 2; /* unicode is 2 bytes each */
+ len += 2; /* trailing null */
+ sec_blob->UserName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->UserName.Length = cpu_to_le16(len);
+ sec_blob->UserName.MaximumLength = cpu_to_le16(len);
+ tmp += len;
+ }
+
+ sec_blob->WorkstationName.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->WorkstationName.Length = 0;
+ sec_blob->WorkstationName.MaximumLength = 0;
+ tmp += 2;
+
+ sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+ sec_blob->SessionKey.Length = 0;
+ sec_blob->SessionKey.MaximumLength = 0;
+ return tmp - pbuffer;
+}
+
+
+static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
+ struct cifsSesInfo *ses)
+{
+ build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses);
+ pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE));
+
+ return;
+}
+
+static int setup_ntlmssp_auth_req(SESSION_SETUP_ANDX *pSMB,
+ struct cifsSesInfo *ses,
+ const struct nls_table *nls, bool first_time)
+{
+ int bloblen;
+
+ bloblen = build_ntlmssp_auth_blob(&pSMB->req.SecurityBlob[0], ses, nls,
+ first_time);
+ pSMB->req.SecurityBlobLength = cpu_to_le16(bloblen);
+
+ return bloblen;
+}
+#endif
+
int
-CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
- const struct nls_table *nls_cp)
+CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
+ const struct nls_table *nls_cp)
{
int rc = 0;
int wct;
__u16 action;
int bytes_remaining;
struct key *spnego_key = NULL;
+ __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
+ bool first_time;
if (ses == NULL)
return -EINVAL;
+ read_lock(&cifs_tcp_ses_lock);
+ first_time = is_first_ses_reconnect(ses);
+ read_unlock(&cifs_tcp_ses_lock);
+
type = ses->server->secType;
- cFYI(1, ("sess setup type %d", type));
+ cFYI(1, "sess setup type %d", type);
+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.
changed to do higher than lanman dialect and
we reconnected would we ever calc signing_key? */
- cFYI(1, ("Negotiating LANMAN setting up strings"));
+ cFYI(1, "Negotiating LANMAN setting up strings");
/* Unicode not allowed for LANMAN dialects */
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
#endif
unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
} else
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
- } else if (type == Kerberos || type == MSKerberos) {
+ } else if (type == Kerberos) {
#ifdef CONFIG_CIFS_UPCALL
struct cifs_spnego_msg *msg;
spnego_key = cifs_get_spnego_key(ses);
/* 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) {
- cERROR(1, ("incorrect version of cifs.upcall (expected"
+ cERROR(1, "incorrect version of cifs.upcall (expected"
" %d but got %d)",
- CIFS_SPNEGO_UPCALL_VERSION, msg->version));
+ CIFS_SPNEGO_UPCALL_VERSION, msg->version);
rc = -EKEYREJECTED;
goto ssetup_exit;
}
/* 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));
+ cERROR(1, "Kerberos signing key too long (%u bytes)",
+ msg->sesskey_len);
rc = -EOVERFLOW;
goto ssetup_exit;
}
/* BB: is this right? */
ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
#else /* ! CONFIG_CIFS_UPCALL */
- cERROR(1, ("Kerberos negotiated but upcall support disabled!"));
+ 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));
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+ if (type == RawNTLMSSP) {
+ if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) {
+ cERROR(1, "NTLMSSP requires Unicode support");
+ rc = -ENOSYS;
+ goto ssetup_exit;
+ }
+
+ cFYI(1, "ntlmssp session setup phase %d", phase);
+ pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
+ capabilities |= CAP_EXTENDED_SECURITY;
+ pSMB->req.Capabilities |= cpu_to_le32(capabilities);
+ if (phase == NtLmNegotiate) {
+ setup_ntlmssp_neg_req(pSMB, ses);
+ iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
+ } else if (phase == NtLmAuthenticate) {
+ int blob_len;
+ blob_len = setup_ntlmssp_auth_req(pSMB, ses,
+ nls_cp,
+ first_time);
+ iov[1].iov_len = 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;
+ } else {
+ cERROR(1, "invalid phase %d", phase);
+ rc = -ENOSYS;
+ goto ssetup_exit;
+ }
+ iov[1].iov_base = &pSMB->req.SecurityBlob[0];
+ /* 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 {
+ cERROR(1, "secType %d not supported!", type);
+ rc = -ENOSYS;
+ goto ssetup_exit;
+ }
+#else
+ cERROR(1, "secType %d not supported!", type);
rc = -ENOSYS;
goto ssetup_exit;
+#endif
}
iov[2].iov_base = str_area;
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;
+ cFYI(1, "ssetup rc from sendrecv2 is %d", rc);
pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base;
smb_buf = (struct smb_hdr *)iov[0].iov_base;
+ if ((type == RawNTLMSSP) && (smb_buf->Status.CifsError ==
+ cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))) {
+ if (phase != NtLmNegotiate) {
+ cERROR(1, "Unexpected more processing error");
+ 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;
- cERROR(1, ("bad word count %d", smb_buf->WordCount));
+ 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? */
+ 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));
+ 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);
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));
+ cERROR(1, "bad security blob length %d", 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 (smb_buf->Flags2 & SMBFLG2_UNICODE)
- rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
- ses, nls_cp);
- 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 {
rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
+ }
ssetup_exit:
if (spnego_key) {
}
kfree(str_area);
if (resp_buf_type == CIFS_SMALL_BUFFER) {
- cFYI(1, ("ssetup freeing small buf %p", iov[0].iov_base));
+ 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);
+ /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */
+ if ((phase == NtLmChallenge) && (rc == 0))
+ goto ssetup_ntlmssp_authenticate;
+
return rc;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff