1 files changed, 139 insertions, 108 deletions

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 0a57cb7db5d..7b01d3f6eed 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -32,9 +32,6 @@
 #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).
@@ -80,7 +77,7 @@ static __le16 get_next_vcnum(struct cifsSesInfo *ses)
 	if (max_vcs < 2)
 		max_vcs = 0xFFFF;
 
-	write_lock(&cifs_tcp_ses_lock);
+	spin_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++) {
@@ -112,7 +109,7 @@ static __le16 get_next_vcnum(struct cifsSesInfo *ses)
 		vcnum = i;
 	ses->vcnum = vcnum;
 get_vc_num_exit:
-	write_unlock(&cifs_tcp_ses_lock);
+	spin_unlock(&cifs_tcp_ses_lock);
 
 	return cpu_to_le16(vcnum);
 }
@@ -383,6 +380,9 @@ static int decode_ascii_ssetup(char **pbcc_area, int bleft,
 static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
 				    struct cifsSesInfo *ses)
 {
+	unsigned int tioffset; /* challenge message target info area */
+	unsigned int tilen; /* challenge message target info area length  */
+
 	CHALLENGE_MESSAGE *pblob = (CHALLENGE_MESSAGE *)bcc_ptr;
 
 	if (blob_len < sizeof(CHALLENGE_MESSAGE)) {
@@ -399,11 +399,23 @@ static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
 		return -EINVAL;
 	}
 
-	memcpy(ses->server->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE);
+	memcpy(ses->ntlmssp->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 */
+	ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags);
+	tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset);
+	tilen = cpu_to_le16(pblob->TargetInfoArray.Length);
+	if (tilen) {
+		ses->auth_key.response = kmalloc(tilen, GFP_KERNEL);
+		if (!ses->auth_key.response) {
+			cERROR(1, "Challenge target info allocation failure");
+			return -ENOMEM;
+		}
+		memcpy(ses->auth_key.response, bcc_ptr + tioffset, tilen);
+		ses->auth_key.len = tilen;
+	}
 
 	return 0;
 }
@@ -425,12 +437,14 @@ static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
 	/* 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;
+		NTLMSSP_NEGOTIATE_NTLM;
 	if (ses->server->secMode &
-	   (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+			(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
 		flags |= NTLMSSP_NEGOTIATE_SIGN;
-	if (ses->server->secMode & SECMODE_SIGN_REQUIRED)
-		flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
+		if (!ses->server->session_estab)
+			flags |= NTLMSSP_NEGOTIATE_KEY_XCH |
+				NTLMSSP_NEGOTIATE_EXTENDED_SEC;
+	}
 
 	sec_blob->NegotiateFlags |= cpu_to_le32(flags);
 
@@ -448,13 +462,14 @@ static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
    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,
+					u16 *buflen,
 				   struct cifsSesInfo *ses,
-				   const struct nls_table *nls_cp, bool first)
+				   const struct nls_table *nls_cp)
 {
+	int rc;
 	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;
@@ -462,7 +477,7 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
 	flags = NTLMSSP_NEGOTIATE_56 |
 		NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
 		NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
-		NTLMSSP_NEGOTIATE_NT_ONLY | NTLMSSP_NEGOTIATE_NTLM;
+		NTLMSSP_NEGOTIATE_NTLM;
 	if (ses->server->secMode &
 	   (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
 		flags |= NTLMSSP_NEGOTIATE_SIGN;
@@ -477,19 +492,20 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
 	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);
+	rc = setup_ntlmv2_rsp(ses, nls_cp);
+	if (rc) {
+		cERROR(1, "Error %d during NTLMSSP authentication", rc);
+		goto setup_ntlmv2_ret;
+	}
+	memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
+			ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+	tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE;
 
-	tmp += CIFS_SESS_KEY_SIZE;
+	sec_blob->NtChallengeResponse.Length =
+			cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
+	sec_blob->NtChallengeResponse.MaximumLength =
+			cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE);
 
 	if (ses->domainName == NULL) {
 		sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer);
@@ -501,7 +517,6 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
 		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);
@@ -518,7 +533,6 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
 		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);
@@ -530,10 +544,23 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer,
 	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;
+	if ((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) &&
+			!calc_seckey(ses)) {
+		memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
+		sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+		sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE);
+		sec_blob->SessionKey.MaximumLength =
+				cpu_to_le16(CIFS_CPHTXT_SIZE);
+		tmp += CIFS_CPHTXT_SIZE;
+	} else {
+		sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer);
+		sec_blob->SessionKey.Length = 0;
+		sec_blob->SessionKey.MaximumLength = 0;
+	}
+
+setup_ntlmv2_ret:
+	*buflen = tmp - pbuffer;
+	return rc;
 }
 
 
@@ -545,19 +572,6 @@ static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB,
 
 	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
@@ -579,18 +593,23 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses,
 	int bytes_remaining;
 	struct key *spnego_key = NULL;
 	__le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
-	bool first_time;
+	u16 blob_len;
+	char *ntlmsspblob = NULL;
 
 	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);
+	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;
+	}
+
 ssetup_ntlmssp_authenticate:
 	if (phase == NtLmChallenge)
 		phase = NtLmAuthenticate; /* if ntlmssp, now final phase */
@@ -655,10 +674,14 @@ ssetup_ntlmssp_authenticate:
 		/* 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->password, ses->server->cryptKey,
+		/* 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).
+		 */
+
+		calc_lanman_hash(ses->password, ses->server->cryptkey,
 				 ses->server->secMode & SECMODE_PW_ENCRYPT ?
 					true : false, lnm_session_key);
 
@@ -676,28 +699,27 @@ ssetup_ntlmssp_authenticate:
 		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);
+			cpu_to_le16(CIFS_AUTH_RESP_SIZE);
 		pSMB->req_no_secext.CaseSensitivePasswordLength =
-			cpu_to_le16(CIFS_SESS_KEY_SIZE);
+			cpu_to_le16(CIFS_AUTH_RESP_SIZE);
 
-		/* calculate session key */
-		SMBNTencrypt(ses->password, ses->server->cryptKey,
-			     ntlm_session_key);
+		/* calculate ntlm response and session key */
+		rc = setup_ntlm_response(ses);
+		if (rc) {
+			cERROR(1, "Error %d during NTLM authentication", rc);
+			goto ssetup_exit;
+		}
 
-		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 */
+		/* 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;
 
-		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) {
@@ -708,33 +730,27 @@ ssetup_ntlmssp_authenticate:
 		} 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); */
 
+		/* calculate nlmv2 response and session key */
+		rc = setup_ntlmv2_rsp(ses, nls_cp);
+		if (rc) {
+			cERROR(1, "Error %d during NTLMv2 authentication", 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(sizeof(struct ntlmv2_resp));
-
-		/* calculate session key */
-		setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp);
-		/* FIXME: calculate MAC key */
-		memcpy(bcc_ptr, (char *)v2_sess_key,
-		       sizeof(struct ntlmv2_resp));
-		bcc_ptr += sizeof(struct ntlmv2_resp);
-		kfree(v2_sess_key);
+			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;
@@ -746,6 +762,7 @@ ssetup_ntlmssp_authenticate:
 	} 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);
@@ -763,19 +780,17 @@ ssetup_ntlmssp_authenticate:
 			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);
-			rc = -EOVERFLOW;
+
+		ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL);
+		if (!ses->auth_key.response) {
+			cERROR(1, "Kerberos can't allocate (%u bytes) memory",
+					msg->sesskey_len);
+			rc = -ENOMEM;
 			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);
-		}
+		memcpy(ses->auth_key.response, msg->data, msg->sesskey_len);
+		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);
@@ -815,12 +830,30 @@ ssetup_ntlmssp_authenticate:
 			if (phase == NtLmNegotiate) {
 				setup_ntlmssp_neg_req(pSMB, ses);
 				iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE);
+				iov[1].iov_base = &pSMB->req.SecurityBlob[0];
 			} else if (phase == NtLmAuthenticate) {
-				int blob_len;
-				blob_len = setup_ntlmssp_auth_req(pSMB, ses,
-								  nls_cp,
-								  first_time);
+				/* 5 is an empirical value, large enought to
+				 * hold authenticate message, max 10 of
+				 * av paris, doamin,user,workstation mames,
+				 * flags etc..
+				 */
+				ntlmsspblob = kmalloc(
+					5*sizeof(struct _AUTHENTICATE_MESSAGE),
+					GFP_KERNEL);
+				if (!ntlmsspblob) {
+					cERROR(1, "Can't allocate NTLMSSP");
+					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) */
@@ -830,7 +863,6 @@ ssetup_ntlmssp_authenticate:
 				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;
@@ -861,8 +893,6 @@ ssetup_ntlmssp_authenticate:
 			  CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR);
 	/* SMB request buf freed in SendReceive2 */
 
-	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;
 
@@ -895,7 +925,6 @@ ssetup_ntlmssp_authenticate:
 	bcc_ptr = pByteArea(smb_buf);
 
 	if (smb_buf->WordCount == 4) {
-		__u16 blob_len;
 		blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
 		if (blob_len > bytes_remaining) {
 			cERROR(1, "bad security blob length %d", blob_len);
@@ -931,6 +960,8 @@ ssetup_exit:
 		key_put(spnego_key);
 	}
 	kfree(str_area);
+	kfree(ntlmsspblob);
+	ntlmsspblob = NULL;
 	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);