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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 17:06:30 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 17:06:30 -0400
commitd4141531f63a29bb2a980092b6f2828c385e6edd (patch)
tree4475e277bf75e2a9a5de07ce1e98b84c834387ec /fs
parentf39d420f672f99ad9a0fe7deb951a0030d4f0d9e (diff)
parent7ac0febb81259fb9e0c447e0b90d0f05f409a02b (diff)
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs updates from Steve French: "Various CIFS/SMB2/SMB3 updates for 3.11. Includes bug fixes - SMB3 support should be much more stable with key DFS fix and also signing possible now (although is more work to do to get SMB3 signing working well with multiuser). Mounts using the new SMB 3.02 dialect can now be done (specify "vers=3.02" on mount) against the most current Microsoft systems. Also includes a big cleanup of the cifs/smb2/smb3 authentication code from Jeff which fixes some long standing problems with the way allowed authentication flavors and signing are configured. Some followon patches later in the cycle will clean up allocation of structures for the various security mechanisms depending on what dialect is chosen (reduces memory usage a little) and to add support for the secure negotiate fsctl (for smb3) which prevents downgrade attacks." * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (39 commits) cifs: fill TRANS2_QUERY_FILE_INFO ByteCount fields cifs: fix SMB2 signing enablement in cifs_enable_signing [CIFS] Fix build warning [CIFS] SMB3 Signing enablement [CIFS] Do not set DFS flag on SMB2 open [CIFS] fix static checker warning cifs: try to handle the MUST SecurityFlags sanely When server doesn't provide SecurityBuffer on SMB2Negotiate pick default Handle big endianness in NTLM (ntlmv2) authentication revalidate directories instiantiated via FIND_* in order to handle DFS referrals SMB2 FSCTL and IOCTL worker function Charge at least one credit, if server says that it supports multicredit Remove typo Some missing share flags cifs: using strlcpy instead of strncpy Update headers to update various SMB3 ioctl definitions Update cifs version number Add ability to dipslay SMB3 share flags and capabilities for debugging Add some missing SMB3 and SMB3.02 flags Add SMB3.02 dialect support ...
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/Kconfig1
-rw-r--r--fs/cifs/cifs_debug.c52
-rw-r--r--fs/cifs/cifs_unicode.h8
-rw-r--r--fs/cifs/cifsencrypt.c40
-rw-r--r--fs/cifs/cifsfs.c11
-rw-r--r--fs/cifs/cifsfs.h2
-rw-r--r--fs/cifs/cifsglob.h48
-rw-r--r--fs/cifs/cifspdu.h17
-rw-r--r--fs/cifs/cifsproto.h4
-rw-r--r--fs/cifs/cifssmb.c425
-rw-r--r--fs/cifs/connect.c159
-rw-r--r--fs/cifs/misc.c3
-rw-r--r--fs/cifs/readdir.c29
-rw-r--r--fs/cifs/sess.c95
-rw-r--r--fs/cifs/smb1ops.c23
-rw-r--r--fs/cifs/smb2glob.h2
-rw-r--r--fs/cifs/smb2misc.c4
-rw-r--r--fs/cifs/smb2ops.c48
-rw-r--r--fs/cifs/smb2pdu.c282
-rw-r--r--fs/cifs/smb2pdu.h100
-rw-r--r--fs/cifs/smb2proto.h4
-rw-r--r--fs/cifs/smb2transport.c151
-rw-r--r--fs/cifs/smbfsctl.h27
-rw-r--r--fs/cifs/transport.c4
24 files changed, 1034 insertions, 505 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index 2906ee276408..603f18a65c12 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -10,6 +10,7 @@ config CIFS
10 select CRYPTO_ECB 10 select CRYPTO_ECB
11 select CRYPTO_DES 11 select CRYPTO_DES
12 select CRYPTO_SHA256 12 select CRYPTO_SHA256
13 select CRYPTO_CMAC
13 help 14 help
14 This is the client VFS module for the Common Internet File System 15 This is the client VFS module for the Common Internet File System
15 (CIFS) protocol which is the successor to the Server Message Block 16 (CIFS) protocol which is the successor to the Server Message Block
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index d59748346020..f3ac4154cbb6 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -213,7 +213,7 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
213 tcon->nativeFileSystem); 213 tcon->nativeFileSystem);
214 } 214 }
215 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x" 215 seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
216 "\nPathComponentMax: %d Status: 0x%d", 216 "\n\tPathComponentMax: %d Status: 0x%d",
217 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), 217 le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics),
218 le32_to_cpu(tcon->fsAttrInfo.Attributes), 218 le32_to_cpu(tcon->fsAttrInfo.Attributes),
219 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), 219 le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength),
@@ -224,6 +224,8 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
224 seq_puts(m, " type: CDROM "); 224 seq_puts(m, " type: CDROM ");
225 else 225 else
226 seq_printf(m, " type: %d ", dev_type); 226 seq_printf(m, " type: %d ", dev_type);
227 if (server->ops->dump_share_caps)
228 server->ops->dump_share_caps(m, tcon);
227 229
228 if (tcon->need_reconnect) 230 if (tcon->need_reconnect)
229 seq_puts(m, "\tDISCONNECTED "); 231 seq_puts(m, "\tDISCONNECTED ");
@@ -595,9 +597,36 @@ static int cifs_security_flags_proc_open(struct inode *inode, struct file *file)
595 return single_open(file, cifs_security_flags_proc_show, NULL); 597 return single_open(file, cifs_security_flags_proc_show, NULL);
596} 598}
597 599
600/*
601 * Ensure that if someone sets a MUST flag, that we disable all other MAY
602 * flags except for the ones corresponding to the given MUST flag. If there are
603 * multiple MUST flags, then try to prefer more secure ones.
604 */
605static void
606cifs_security_flags_handle_must_flags(unsigned int *flags)
607{
608 unsigned int signflags = *flags & CIFSSEC_MUST_SIGN;
609
610 if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
611 *flags = CIFSSEC_MUST_KRB5;
612 else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
613 *flags = CIFSSEC_MUST_NTLMSSP;
614 else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
615 *flags = CIFSSEC_MUST_NTLMV2;
616 else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM)
617 *flags = CIFSSEC_MUST_NTLM;
618 else if ((*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN)
619 *flags = CIFSSEC_MUST_LANMAN;
620 else if ((*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT)
621 *flags = CIFSSEC_MUST_PLNTXT;
622
623 *flags |= signflags;
624}
625
598static ssize_t cifs_security_flags_proc_write(struct file *file, 626static ssize_t cifs_security_flags_proc_write(struct file *file,
599 const char __user *buffer, size_t count, loff_t *ppos) 627 const char __user *buffer, size_t count, loff_t *ppos)
600{ 628{
629 int rc;
601 unsigned int flags; 630 unsigned int flags;
602 char flags_string[12]; 631 char flags_string[12];
603 char c; 632 char c;
@@ -620,26 +649,35 @@ static ssize_t cifs_security_flags_proc_write(struct file *file,
620 global_secflags = CIFSSEC_MAX; 649 global_secflags = CIFSSEC_MAX;
621 return count; 650 return count;
622 } else if (!isdigit(c)) { 651 } else if (!isdigit(c)) {
623 cifs_dbg(VFS, "invalid flag %c\n", c); 652 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
653 flags_string);
624 return -EINVAL; 654 return -EINVAL;
625 } 655 }
626 } 656 }
627 /* else we have a number */
628 657
629 flags = simple_strtoul(flags_string, NULL, 0); 658 /* else we have a number */
659 rc = kstrtouint(flags_string, 0, &flags);
660 if (rc) {
661 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n",
662 flags_string);
663 return rc;
664 }
630 665
631 cifs_dbg(FYI, "sec flags 0x%x\n", flags); 666 cifs_dbg(FYI, "sec flags 0x%x\n", flags);
632 667
633 if (flags <= 0) { 668 if (flags == 0) {
634 cifs_dbg(VFS, "invalid security flags %s\n", flags_string); 669 cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string);
635 return -EINVAL; 670 return -EINVAL;
636 } 671 }
637 672
638 if (flags & ~CIFSSEC_MASK) { 673 if (flags & ~CIFSSEC_MASK) {
639 cifs_dbg(VFS, "attempt to set unsupported security flags 0x%x\n", 674 cifs_dbg(VFS, "Unsupported security flags: 0x%x\n",
640 flags & ~CIFSSEC_MASK); 675 flags & ~CIFSSEC_MASK);
641 return -EINVAL; 676 return -EINVAL;
642 } 677 }
678
679 cifs_security_flags_handle_must_flags(&flags);
680
643 /* flags look ok - update the global security flags for cifs module */ 681 /* flags look ok - update the global security flags for cifs module */
644 global_secflags = flags; 682 global_secflags = flags;
645 if (global_secflags & CIFSSEC_MUST_SIGN) { 683 if (global_secflags & CIFSSEC_MUST_SIGN) {
diff --git a/fs/cifs/cifs_unicode.h b/fs/cifs/cifs_unicode.h
index 4fb097468e21..fe8d6276410a 100644
--- a/fs/cifs/cifs_unicode.h
+++ b/fs/cifs/cifs_unicode.h
@@ -327,14 +327,14 @@ UniToupper(register wchar_t uc)
327/* 327/*
328 * UniStrupr: Upper case a unicode string 328 * UniStrupr: Upper case a unicode string
329 */ 329 */
330static inline wchar_t * 330static inline __le16 *
331UniStrupr(register wchar_t *upin) 331UniStrupr(register __le16 *upin)
332{ 332{
333 register wchar_t *up; 333 register __le16 *up;
334 334
335 up = upin; 335 up = upin;
336 while (*up) { /* For all characters */ 336 while (*up) { /* For all characters */
337 *up = UniToupper(*up); 337 *up = cpu_to_le16(UniToupper(le16_to_cpu(*up)));
338 up++; 338 up++;
339 } 339 }
340 return upin; /* Return input pointer */ 340 return upin; /* Return input pointer */
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 71436d1fca13..3d8bf941d126 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -276,7 +276,6 @@ int calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt,
276 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE); 276 strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE);
277 277
278 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) { 278 if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) {
279 memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE);
280 memcpy(lnm_session_key, password_with_pad, 279 memcpy(lnm_session_key, password_with_pad,
281 CIFS_ENCPWD_SIZE); 280 CIFS_ENCPWD_SIZE);
282 return 0; 281 return 0;
@@ -414,7 +413,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
414 int rc = 0; 413 int rc = 0;
415 int len; 414 int len;
416 char nt_hash[CIFS_NTHASH_SIZE]; 415 char nt_hash[CIFS_NTHASH_SIZE];
417 wchar_t *user; 416 __le16 *user;
418 wchar_t *domain; 417 wchar_t *domain;
419 wchar_t *server; 418 wchar_t *server;
420 419
@@ -439,7 +438,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
439 return rc; 438 return rc;
440 } 439 }
441 440
442 /* convert ses->user_name to unicode and uppercase */ 441 /* convert ses->user_name to unicode */
443 len = ses->user_name ? strlen(ses->user_name) : 0; 442 len = ses->user_name ? strlen(ses->user_name) : 0;
444 user = kmalloc(2 + (len * 2), GFP_KERNEL); 443 user = kmalloc(2 + (len * 2), GFP_KERNEL);
445 if (user == NULL) { 444 if (user == NULL) {
@@ -448,7 +447,7 @@ static int calc_ntlmv2_hash(struct cifs_ses *ses, char *ntlmv2_hash,
448 } 447 }
449 448
450 if (len) { 449 if (len) {
451 len = cifs_strtoUTF16((__le16 *)user, ses->user_name, len, nls_cp); 450 len = cifs_strtoUTF16(user, ses->user_name, len, nls_cp);
452 UniStrupr(user); 451 UniStrupr(user);
453 } else { 452 } else {
454 memset(user, '\0', 2); 453 memset(user, '\0', 2);
@@ -536,7 +535,7 @@ CalcNTLMv2_response(const struct cifs_ses *ses, char *ntlmv2_hash)
536 return rc; 535 return rc;
537 } 536 }
538 537
539 if (ses->server->secType == RawNTLMSSP) 538 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED)
540 memcpy(ses->auth_key.response + offset, 539 memcpy(ses->auth_key.response + offset,
541 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE); 540 ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE);
542 else 541 else
@@ -568,7 +567,7 @@ setup_ntlmv2_rsp(struct cifs_ses *ses, const struct nls_table *nls_cp)
568 char ntlmv2_hash[16]; 567 char ntlmv2_hash[16];
569 unsigned char *tiblob = NULL; /* target info blob */ 568 unsigned char *tiblob = NULL; /* target info blob */
570 569
571 if (ses->server->secType == RawNTLMSSP) { 570 if (ses->server->negflavor == CIFS_NEGFLAVOR_EXTENDED) {
572 if (!ses->domainName) { 571 if (!ses->domainName) {
573 rc = find_domain_name(ses, nls_cp); 572 rc = find_domain_name(ses, nls_cp);
574 if (rc) { 573 if (rc) {
@@ -706,6 +705,9 @@ calc_seckey(struct cifs_ses *ses)
706void 705void
707cifs_crypto_shash_release(struct TCP_Server_Info *server) 706cifs_crypto_shash_release(struct TCP_Server_Info *server)
708{ 707{
708 if (server->secmech.cmacaes)
709 crypto_free_shash(server->secmech.cmacaes);
710
709 if (server->secmech.hmacsha256) 711 if (server->secmech.hmacsha256)
710 crypto_free_shash(server->secmech.hmacsha256); 712 crypto_free_shash(server->secmech.hmacsha256);
711 713
@@ -715,6 +717,8 @@ cifs_crypto_shash_release(struct TCP_Server_Info *server)
715 if (server->secmech.hmacmd5) 717 if (server->secmech.hmacmd5)
716 crypto_free_shash(server->secmech.hmacmd5); 718 crypto_free_shash(server->secmech.hmacmd5);
717 719
720 kfree(server->secmech.sdesccmacaes);
721
718 kfree(server->secmech.sdeschmacsha256); 722 kfree(server->secmech.sdeschmacsha256);
719 723
720 kfree(server->secmech.sdeschmacmd5); 724 kfree(server->secmech.sdeschmacmd5);
@@ -748,6 +752,13 @@ cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
748 goto crypto_allocate_hmacsha256_fail; 752 goto crypto_allocate_hmacsha256_fail;
749 } 753 }
750 754
755 server->secmech.cmacaes = crypto_alloc_shash("cmac(aes)", 0, 0);
756 if (IS_ERR(server->secmech.cmacaes)) {
757 cifs_dbg(VFS, "could not allocate crypto cmac-aes");
758 rc = PTR_ERR(server->secmech.cmacaes);
759 goto crypto_allocate_cmacaes_fail;
760 }
761
751 size = sizeof(struct shash_desc) + 762 size = sizeof(struct shash_desc) +
752 crypto_shash_descsize(server->secmech.hmacmd5); 763 crypto_shash_descsize(server->secmech.hmacmd5);
753 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL); 764 server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL);
@@ -778,8 +789,22 @@ cifs_crypto_shash_allocate(struct TCP_Server_Info *server)
778 server->secmech.sdeschmacsha256->shash.tfm = server->secmech.hmacsha256; 789 server->secmech.sdeschmacsha256->shash.tfm = server->secmech.hmacsha256;
779 server->secmech.sdeschmacsha256->shash.flags = 0x0; 790 server->secmech.sdeschmacsha256->shash.flags = 0x0;
780 791
792 size = sizeof(struct shash_desc) +
793 crypto_shash_descsize(server->secmech.cmacaes);
794 server->secmech.sdesccmacaes = kmalloc(size, GFP_KERNEL);
795 if (!server->secmech.sdesccmacaes) {
796 cifs_dbg(VFS, "%s: Can't alloc cmacaes\n", __func__);
797 rc = -ENOMEM;
798 goto crypto_allocate_cmacaes_sdesc_fail;
799 }
800 server->secmech.sdesccmacaes->shash.tfm = server->secmech.cmacaes;
801 server->secmech.sdesccmacaes->shash.flags = 0x0;
802
781 return 0; 803 return 0;
782 804
805crypto_allocate_cmacaes_sdesc_fail:
806 kfree(server->secmech.sdeschmacsha256);
807
783crypto_allocate_hmacsha256_sdesc_fail: 808crypto_allocate_hmacsha256_sdesc_fail:
784 kfree(server->secmech.sdescmd5); 809 kfree(server->secmech.sdescmd5);
785 810
@@ -787,6 +812,9 @@ crypto_allocate_md5_sdesc_fail:
787 kfree(server->secmech.sdeschmacmd5); 812 kfree(server->secmech.sdeschmacmd5);
788 813
789crypto_allocate_hmacmd5_sdesc_fail: 814crypto_allocate_hmacmd5_sdesc_fail:
815 crypto_free_shash(server->secmech.cmacaes);
816
817crypto_allocate_cmacaes_fail:
790 crypto_free_shash(server->secmech.hmacsha256); 818 crypto_free_shash(server->secmech.hmacsha256);
791 819
792crypto_allocate_hmacsha256_fail: 820crypto_allocate_hmacsha256_fail:
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index a445e71746fa..4bdd547dbf6f 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -312,11 +312,14 @@ cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
312} 312}
313 313
314static void 314static void
315cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) 315cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
316{ 316{
317 if (ses->sectype == Unspecified)
318 return;
319
317 seq_printf(s, ",sec="); 320 seq_printf(s, ",sec=");
318 321
319 switch (server->secType) { 322 switch (ses->sectype) {
320 case LANMAN: 323 case LANMAN:
321 seq_printf(s, "lanman"); 324 seq_printf(s, "lanman");
322 break; 325 break;
@@ -338,7 +341,7 @@ cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
338 break; 341 break;
339 } 342 }
340 343
341 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) 344 if (ses->sign)
342 seq_printf(s, "i"); 345 seq_printf(s, "i");
343} 346}
344 347
@@ -369,7 +372,7 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
369 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; 372 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
370 373
371 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); 374 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
372 cifs_show_security(s, tcon->ses->server); 375 cifs_show_security(s, tcon->ses);
373 cifs_show_cache_flavor(s, cifs_sb); 376 cifs_show_cache_flavor(s, cifs_sb);
374 377
375 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) 378 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index d05b3028e3b9..ea723a5e8226 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -132,5 +132,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
132extern const struct export_operations cifs_export_ops; 132extern const struct export_operations cifs_export_ops;
133#endif /* CONFIG_CIFS_NFSD_EXPORT */ 133#endif /* CONFIG_CIFS_NFSD_EXPORT */
134 134
135#define CIFS_VERSION "2.0" 135#define CIFS_VERSION "2.01"
136#endif /* _CIFSFS_H */ 136#endif /* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4f07f6fbe494..e66b08882548 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -101,20 +101,14 @@ enum statusEnum {
101}; 101};
102 102
103enum securityEnum { 103enum securityEnum {
104 LANMAN = 0, /* Legacy LANMAN auth */ 104 Unspecified = 0, /* not specified */
105 LANMAN, /* Legacy LANMAN auth */
105 NTLM, /* Legacy NTLM012 auth with NTLM hash */ 106 NTLM, /* Legacy NTLM012 auth with NTLM hash */
106 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ 107 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
107 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */ 108 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
108/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
109 Kerberos, /* Kerberos via SPNEGO */ 109 Kerberos, /* Kerberos via SPNEGO */
110}; 110};
111 111
112enum protocolEnum {
113 TCP = 0,
114 SCTP
115 /* Netbios frames protocol not supported at this time */
116};
117
118struct session_key { 112struct session_key {
119 unsigned int len; 113 unsigned int len;
120 char *response; 114 char *response;
@@ -131,9 +125,11 @@ struct cifs_secmech {
131 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */ 125 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
132 struct crypto_shash *md5; /* md5 hash function */ 126 struct crypto_shash *md5; /* md5 hash function */
133 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */ 127 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
128 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
134 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */ 129 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
135 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */ 130 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
136 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */ 131 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
132 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
137}; 133};
138 134
139/* per smb session structure/fields */ 135/* per smb session structure/fields */
@@ -181,6 +177,7 @@ enum smb_version {
181 Smb_20, 177 Smb_20,
182 Smb_21, 178 Smb_21,
183 Smb_30, 179 Smb_30,
180 Smb_302,
184}; 181};
185 182
186struct mid_q_entry; 183struct mid_q_entry;
@@ -228,6 +225,7 @@ struct smb_version_operations {
228 void (*dump_detail)(void *); 225 void (*dump_detail)(void *);
229 void (*clear_stats)(struct cifs_tcon *); 226 void (*clear_stats)(struct cifs_tcon *);
230 void (*print_stats)(struct seq_file *m, struct cifs_tcon *); 227 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
228 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
231 /* verify the message */ 229 /* verify the message */
232 int (*check_message)(char *, unsigned int); 230 int (*check_message)(char *, unsigned int);
233 bool (*is_oplock_break)(char *, struct TCP_Server_Info *); 231 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
@@ -367,6 +365,8 @@ struct smb_version_operations {
367 void (*set_lease_key)(struct inode *, struct cifs_fid *fid); 365 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
368 /* generate new lease key */ 366 /* generate new lease key */
369 void (*new_lease_key)(struct cifs_fid *fid); 367 void (*new_lease_key)(struct cifs_fid *fid);
368 /* The next two functions will need to be changed to per smb session */
369 void (*generate_signingkey)(struct TCP_Server_Info *server);
370 int (*calc_signature)(struct smb_rqst *rqst, 370 int (*calc_signature)(struct smb_rqst *rqst,
371 struct TCP_Server_Info *server); 371 struct TCP_Server_Info *server);
372}; 372};
@@ -387,6 +387,8 @@ struct smb_version_values {
387 unsigned int cap_nt_find; 387 unsigned int cap_nt_find;
388 unsigned int cap_large_files; 388 unsigned int cap_large_files;
389 unsigned int oplock_read; 389 unsigned int oplock_read;
390 __u16 signing_enabled;
391 __u16 signing_required;
390}; 392};
391 393
392#define HEADER_SIZE(server) (server->vals->header_size) 394#define HEADER_SIZE(server) (server->vals->header_size)
@@ -407,7 +409,8 @@ struct smb_vol {
407 kgid_t backupgid; 409 kgid_t backupgid;
408 umode_t file_mode; 410 umode_t file_mode;
409 umode_t dir_mode; 411 umode_t dir_mode;
410 unsigned secFlg; 412 enum securityEnum sectype; /* sectype requested via mnt opts */
413 bool sign; /* was signing requested via mnt opts? */
411 bool retry:1; 414 bool retry:1;
412 bool intr:1; 415 bool intr:1;
413 bool setuids:1; 416 bool setuids:1;
@@ -441,6 +444,7 @@ struct smb_vol {
441 bool mfsymlinks:1; /* use Minshall+French Symlinks */ 444 bool mfsymlinks:1; /* use Minshall+French Symlinks */
442 bool multiuser:1; 445 bool multiuser:1;
443 bool rwpidforward:1; /* pid forward for read/write operations */ 446 bool rwpidforward:1; /* pid forward for read/write operations */
447 bool nosharesock;
444 unsigned int rsize; 448 unsigned int rsize;
445 unsigned int wsize; 449 unsigned int wsize;
446 bool sockopt_tcp_nodelay:1; 450 bool sockopt_tcp_nodelay:1;
@@ -514,6 +518,7 @@ struct TCP_Server_Info {
514 struct task_struct *tsk; 518 struct task_struct *tsk;
515 char server_GUID[16]; 519 char server_GUID[16];
516 __u16 sec_mode; 520 __u16 sec_mode;
521 bool sign; /* is signing enabled on this connection? */
517 bool session_estab; /* mark when very first sess is established */ 522 bool session_estab; /* mark when very first sess is established */
518#ifdef CONFIG_CIFS_SMB2 523#ifdef CONFIG_CIFS_SMB2
519 int echo_credits; /* echo reserved slots */ 524 int echo_credits; /* echo reserved slots */
@@ -521,7 +526,6 @@ struct TCP_Server_Info {
521 bool echoes:1; /* enable echoes */ 526 bool echoes:1; /* enable echoes */
522#endif 527#endif
523 u16 dialect; /* dialect index that server chose */ 528 u16 dialect; /* dialect index that server chose */
524 enum securityEnum secType;
525 bool oplocks:1; /* enable oplocks */ 529 bool oplocks:1; /* enable oplocks */
526 unsigned int maxReq; /* Clients should submit no more */ 530 unsigned int maxReq; /* Clients should submit no more */
527 /* than maxReq distinct unanswered SMBs to the server when using */ 531 /* than maxReq distinct unanswered SMBs to the server when using */
@@ -540,12 +544,17 @@ struct TCP_Server_Info {
540 int timeAdj; /* Adjust for difference in server time zone in sec */ 544 int timeAdj; /* Adjust for difference in server time zone in sec */
541 __u64 CurrentMid; /* multiplex id - rotating counter */ 545 __u64 CurrentMid; /* multiplex id - rotating counter */
542 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ 546 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
547 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
543 /* 16th byte of RFC1001 workstation name is always null */ 548 /* 16th byte of RFC1001 workstation name is always null */
544 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; 549 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
545 __u32 sequence_number; /* for signing, protected by srv_mutex */ 550 __u32 sequence_number; /* for signing, protected by srv_mutex */
546 struct session_key session_key; 551 struct session_key session_key;
547 unsigned long lstrp; /* when we got last response from this server */ 552 unsigned long lstrp; /* when we got last response from this server */
548 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ 553 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
554#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
555#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
556#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
557 char negflavor; /* NEGOTIATE response flavor */
549 /* extended security flavors that server supports */ 558 /* extended security flavors that server supports */
550 bool sec_ntlmssp; /* supports NTLMSSP */ 559 bool sec_ntlmssp; /* supports NTLMSSP */
551 bool sec_kerberosu2u; /* supports U2U Kerberos */ 560 bool sec_kerberosu2u; /* supports U2U Kerberos */
@@ -697,7 +706,6 @@ struct cifs_ses {
697 enum statusEnum status; 706 enum statusEnum status;
698 unsigned overrideSecFlg; /* if non-zero override global sec flags */ 707 unsigned overrideSecFlg; /* if non-zero override global sec flags */
699 __u16 ipc_tid; /* special tid for connection to IPC share */ 708 __u16 ipc_tid; /* special tid for connection to IPC share */
700 __u16 flags;
701 __u16 vcnum; 709 __u16 vcnum;
702 char *serverOS; /* name of operating system underlying server */ 710 char *serverOS; /* name of operating system underlying server */
703 char *serverNOS; /* name of network operating system of server */ 711 char *serverNOS; /* name of network operating system of server */
@@ -714,21 +722,14 @@ struct cifs_ses {
714 char *password; 722 char *password;
715 struct session_key auth_key; 723 struct session_key auth_key;
716 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ 724 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
725 enum securityEnum sectype; /* what security flavor was specified? */
726 bool sign; /* is signing required? */
717 bool need_reconnect:1; /* connection reset, uid now invalid */ 727 bool need_reconnect:1; /* connection reset, uid now invalid */
718#ifdef CONFIG_CIFS_SMB2 728#ifdef CONFIG_CIFS_SMB2
719 __u16 session_flags; 729 __u16 session_flags;
720#endif /* CONFIG_CIFS_SMB2 */ 730#endif /* CONFIG_CIFS_SMB2 */
721}; 731};
722 732
723/* no more than one of the following three session flags may be set */
724#define CIFS_SES_NT4 1
725#define CIFS_SES_OS2 2
726#define CIFS_SES_W9X 4
727/* following flag is set for old servers such as OS2 (and Win95?)
728 which do not negotiate NTLM or POSIX dialects, but instead
729 negotiate one of the older LANMAN dialects */
730#define CIFS_SES_LANMAN 8
731
732static inline bool 733static inline bool
733cap_unix(struct cifs_ses *ses) 734cap_unix(struct cifs_ses *ses)
734{ 735{
@@ -816,7 +817,7 @@ struct cifs_tcon {
816#ifdef CONFIG_CIFS_SMB2 817#ifdef CONFIG_CIFS_SMB2
817 bool print:1; /* set if connection to printer share */ 818 bool print:1; /* set if connection to printer share */
818 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */ 819 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
819 __u32 capabilities; 820 __le32 capabilities;
820 __u32 share_flags; 821 __u32 share_flags;
821 __u32 maximal_access; 822 __u32 maximal_access;
822 __u32 vol_serial_number; 823 __u32 vol_serial_number;
@@ -1348,7 +1349,7 @@ require use of the stronger protocol */
1348#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ 1349#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1349#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */ 1350#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1350 1351
1351#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP) 1352#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1352#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2) 1353#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1353#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP) 1354#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1354/* 1355/*
@@ -1494,4 +1495,7 @@ extern struct smb_version_values smb21_values;
1494#define SMB30_VERSION_STRING "3.0" 1495#define SMB30_VERSION_STRING "3.0"
1495extern struct smb_version_operations smb30_operations; 1496extern struct smb_version_operations smb30_operations;
1496extern struct smb_version_values smb30_values; 1497extern struct smb_version_values smb30_values;
1498#define SMB302_VERSION_STRING "3.02"
1499/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1500extern struct smb_version_values smb302_values;
1497#endif /* _CIFS_GLOB_H */ 1501#endif /* _CIFS_GLOB_H */
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index e996ff6b26d1..11ca24a8e054 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -142,6 +142,11 @@
142 */ 142 */
143#define CIFS_SESS_KEY_SIZE (16) 143#define CIFS_SESS_KEY_SIZE (16)
144 144
145/*
146 * Size of the smb3 signing key
147 */
148#define SMB3_SIGN_KEY_SIZE (16)
149
145#define CIFS_CLIENT_CHALLENGE_SIZE (8) 150#define CIFS_CLIENT_CHALLENGE_SIZE (8)
146#define CIFS_SERVER_CHALLENGE_SIZE (8) 151#define CIFS_SERVER_CHALLENGE_SIZE (8)
147#define CIFS_HMAC_MD5_HASH_SIZE (16) 152#define CIFS_HMAC_MD5_HASH_SIZE (16)
@@ -531,7 +536,7 @@ typedef struct lanman_neg_rsp {
531#define READ_RAW_ENABLE 1 536#define READ_RAW_ENABLE 1
532#define WRITE_RAW_ENABLE 2 537#define WRITE_RAW_ENABLE 2
533#define RAW_ENABLE (READ_RAW_ENABLE | WRITE_RAW_ENABLE) 538#define RAW_ENABLE (READ_RAW_ENABLE | WRITE_RAW_ENABLE)
534 539#define SMB1_CLIENT_GUID_SIZE (16)
535typedef struct negotiate_rsp { 540typedef struct negotiate_rsp {
536 struct smb_hdr hdr; /* wct = 17 */ 541 struct smb_hdr hdr; /* wct = 17 */
537 __le16 DialectIndex; /* 0xFFFF = no dialect acceptable */ 542 __le16 DialectIndex; /* 0xFFFF = no dialect acceptable */
@@ -553,7 +558,7 @@ typedef struct negotiate_rsp {
553 /* followed by 16 bytes of server GUID */ 558 /* followed by 16 bytes of server GUID */
554 /* then security blob if cap_extended_security negotiated */ 559 /* then security blob if cap_extended_security negotiated */
555 struct { 560 struct {
556 unsigned char GUID[16]; 561 unsigned char GUID[SMB1_CLIENT_GUID_SIZE];
557 unsigned char SecurityBlob[1]; 562 unsigned char SecurityBlob[1];
558 } __attribute__((packed)) extended_response; 563 } __attribute__((packed)) extended_response;
559 } __attribute__((packed)) u; 564 } __attribute__((packed)) u;
@@ -1315,6 +1320,14 @@ typedef struct smb_com_ntransact_rsp {
1315 /* parms and data follow */ 1320 /* parms and data follow */
1316} __attribute__((packed)) NTRANSACT_RSP; 1321} __attribute__((packed)) NTRANSACT_RSP;
1317 1322
1323/* See MS-SMB 2.2.7.2.1.1 */
1324struct srv_copychunk {
1325 __le64 SourceOffset;
1326 __le64 DestinationOffset;
1327 __le32 CopyLength;
1328 __u32 Reserved;
1329} __packed;
1330
1318typedef struct smb_com_transaction_ioctl_req { 1331typedef struct smb_com_transaction_ioctl_req {
1319 struct smb_hdr hdr; /* wct = 23 */ 1332 struct smb_hdr hdr; /* wct = 23 */
1320 __u8 MaxSetupCount; 1333 __u8 MaxSetupCount;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index dda188a94332..c8ff018fae68 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -118,6 +118,8 @@ extern void header_assemble(struct smb_hdr *, char /* command */ ,
118extern int small_smb_init_no_tc(const int smb_cmd, const int wct, 118extern int small_smb_init_no_tc(const int smb_cmd, const int wct,
119 struct cifs_ses *ses, 119 struct cifs_ses *ses,
120 void **request_buf); 120 void **request_buf);
121extern enum securityEnum select_sectype(struct TCP_Server_Info *server,
122 enum securityEnum requested);
121extern int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, 123extern int CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
122 const struct nls_table *nls_cp); 124 const struct nls_table *nls_cp);
123extern struct timespec cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601); 125extern struct timespec cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601);
@@ -212,6 +214,7 @@ extern int cifs_negotiate_protocol(const unsigned int xid,
212 struct cifs_ses *ses); 214 struct cifs_ses *ses);
213extern int cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, 215extern int cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
214 struct nls_table *nls_info); 216 struct nls_table *nls_info);
217extern int cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required);
215extern int CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses); 218extern int CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses);
216 219
217extern int CIFSTCon(const unsigned int xid, struct cifs_ses *ses, 220extern int CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
@@ -433,6 +436,7 @@ extern int setup_ntlmv2_rsp(struct cifs_ses *, const struct nls_table *);
433extern int cifs_crypto_shash_allocate(struct TCP_Server_Info *); 436extern int cifs_crypto_shash_allocate(struct TCP_Server_Info *);
434extern void cifs_crypto_shash_release(struct TCP_Server_Info *); 437extern void cifs_crypto_shash_release(struct TCP_Server_Info *);
435extern int calc_seckey(struct cifs_ses *); 438extern int calc_seckey(struct cifs_ses *);
439extern void generate_smb3signingkey(struct TCP_Server_Info *);
436 440
437#ifdef CONFIG_CIFS_WEAK_PW_HASH 441#ifdef CONFIG_CIFS_WEAK_PW_HASH
438extern int calc_lanman_hash(const char *password, const char *cryptkey, 442extern int calc_lanman_hash(const char *password, const char *cryptkey,
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index a58dc77cc443..a89c4cb4e6cf 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -367,6 +367,185 @@ vt2_err:
367 return -EINVAL; 367 return -EINVAL;
368} 368}
369 369
370static int
371decode_ext_sec_blob(struct cifs_ses *ses, NEGOTIATE_RSP *pSMBr)
372{
373 int rc = 0;
374 u16 count;
375 char *guid = pSMBr->u.extended_response.GUID;
376 struct TCP_Server_Info *server = ses->server;
377
378 count = get_bcc(&pSMBr->hdr);
379 if (count < SMB1_CLIENT_GUID_SIZE)
380 return -EIO;
381
382 spin_lock(&cifs_tcp_ses_lock);
383 if (server->srv_count > 1) {
384 spin_unlock(&cifs_tcp_ses_lock);
385 if (memcmp(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE) != 0) {
386 cifs_dbg(FYI, "server UID changed\n");
387 memcpy(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE);
388 }
389 } else {
390 spin_unlock(&cifs_tcp_ses_lock);
391 memcpy(server->server_GUID, guid, SMB1_CLIENT_GUID_SIZE);
392 }
393
394 if (count == SMB1_CLIENT_GUID_SIZE) {
395 server->sec_ntlmssp = true;
396 } else {
397 count -= SMB1_CLIENT_GUID_SIZE;
398 rc = decode_negTokenInit(
399 pSMBr->u.extended_response.SecurityBlob, count, server);
400 if (rc != 1)
401 return -EINVAL;
402 }
403
404 return 0;
405}
406
407int
408cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required)
409{
410 bool srv_sign_required = server->sec_mode & server->vals->signing_required;
411 bool srv_sign_enabled = server->sec_mode & server->vals->signing_enabled;
412 bool mnt_sign_enabled = global_secflags & CIFSSEC_MAY_SIGN;
413
414 /*
415 * Is signing required by mnt options? If not then check
416 * global_secflags to see if it is there.
417 */
418 if (!mnt_sign_required)
419 mnt_sign_required = ((global_secflags & CIFSSEC_MUST_SIGN) ==
420 CIFSSEC_MUST_SIGN);
421
422 /*
423 * If signing is required then it's automatically enabled too,
424 * otherwise, check to see if the secflags allow it.
425 */
426 mnt_sign_enabled = mnt_sign_required ? mnt_sign_required :
427 (global_secflags & CIFSSEC_MAY_SIGN);
428
429 /* If server requires signing, does client allow it? */
430 if (srv_sign_required) {
431 if (!mnt_sign_enabled) {
432 cifs_dbg(VFS, "Server requires signing, but it's disabled in SecurityFlags!");
433 return -ENOTSUPP;
434 }
435 server->sign = true;
436 }
437
438 /* If client requires signing, does server allow it? */
439 if (mnt_sign_required) {
440 if (!srv_sign_enabled) {
441 cifs_dbg(VFS, "Server does not support signing!");
442 return -ENOTSUPP;
443 }
444 server->sign = true;
445 }
446
447 return 0;
448}
449
450#ifdef CONFIG_CIFS_WEAK_PW_HASH
451static int
452decode_lanman_negprot_rsp(struct TCP_Server_Info *server, NEGOTIATE_RSP *pSMBr)
453{
454 __s16 tmp;
455 struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr;
456
457 if (server->dialect != LANMAN_PROT && server->dialect != LANMAN2_PROT)
458 return -EOPNOTSUPP;
459
460 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
461 server->maxReq = min_t(unsigned int,
462 le16_to_cpu(rsp->MaxMpxCount),
463 cifs_max_pending);
464 set_credits(server, server->maxReq);
465 server->maxBuf = le16_to_cpu(rsp->MaxBufSize);
466 server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs);
467 /* even though we do not use raw we might as well set this
468 accurately, in case we ever find a need for it */
469 if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) {
470 server->max_rw = 0xFF00;
471 server->capabilities = CAP_MPX_MODE | CAP_RAW_MODE;
472 } else {
473 server->max_rw = 0;/* do not need to use raw anyway */
474 server->capabilities = CAP_MPX_MODE;
475 }
476 tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone);
477 if (tmp == -1) {
478 /* OS/2 often does not set timezone therefore
479 * we must use server time to calc time zone.
480 * Could deviate slightly from the right zone.
481 * Smallest defined timezone difference is 15 minutes
482 * (i.e. Nepal). Rounding up/down is done to match
483 * this requirement.
484 */
485 int val, seconds, remain, result;
486 struct timespec ts, utc;
487 utc = CURRENT_TIME;
488 ts = cnvrtDosUnixTm(rsp->SrvTime.Date,
489 rsp->SrvTime.Time, 0);
490 cifs_dbg(FYI, "SrvTime %d sec since 1970 (utc: %d) diff: %d\n",
491 (int)ts.tv_sec, (int)utc.tv_sec,
492 (int)(utc.tv_sec - ts.tv_sec));
493 val = (int)(utc.tv_sec - ts.tv_sec);
494 seconds = abs(val);
495 result = (seconds / MIN_TZ_ADJ) * MIN_TZ_ADJ;
496 remain = seconds % MIN_TZ_ADJ;
497 if (remain >= (MIN_TZ_ADJ / 2))
498 result += MIN_TZ_ADJ;
499 if (val < 0)
500 result = -result;
501 server->timeAdj = result;
502 } else {
503 server->timeAdj = (int)tmp;
504 server->timeAdj *= 60; /* also in seconds */
505 }
506 cifs_dbg(FYI, "server->timeAdj: %d seconds\n", server->timeAdj);
507
508
509 /* BB get server time for time conversions and add
510 code to use it and timezone since this is not UTC */
511
512 if (rsp->EncryptionKeyLength ==
513 cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
514 memcpy(server->cryptkey, rsp->EncryptionKey,
515 CIFS_CRYPTO_KEY_SIZE);
516 } else if (server->sec_mode & SECMODE_PW_ENCRYPT) {
517 return -EIO; /* need cryptkey unless plain text */
518 }
519
520 cifs_dbg(FYI, "LANMAN negotiated\n");
521 return 0;
522}
523#else
524static inline int
525decode_lanman_negprot_rsp(struct TCP_Server_Info *server, NEGOTIATE_RSP *pSMBr)
526{
527 cifs_dbg(VFS, "mount failed, cifs module not built with CIFS_WEAK_PW_HASH support\n");
528 return -EOPNOTSUPP;
529}
530#endif
531
532static bool
533should_set_ext_sec_flag(enum securityEnum sectype)
534{
535 switch (sectype) {
536 case RawNTLMSSP:
537 case Kerberos:
538 return true;
539 case Unspecified:
540 if (global_secflags &
541 (CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP))
542 return true;
543 /* Fallthrough */
544 default:
545 return false;
546 }
547}
548
370int 549int
371CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses) 550CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
372{ 551{
@@ -375,41 +554,24 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
375 int rc = 0; 554 int rc = 0;
376 int bytes_returned; 555 int bytes_returned;
377 int i; 556 int i;
378 struct TCP_Server_Info *server; 557 struct TCP_Server_Info *server = ses->server;
379 u16 count; 558 u16 count;
380 unsigned int secFlags;
381 559
382 if (ses->server) 560 if (!server) {
383 server = ses->server; 561 WARN(1, "%s: server is NULL!\n", __func__);
384 else { 562 return -EIO;
385 rc = -EIO;
386 return rc;
387 } 563 }
564
388 rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ , 565 rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ ,
389 (void **) &pSMB, (void **) &pSMBr); 566 (void **) &pSMB, (void **) &pSMBr);
390 if (rc) 567 if (rc)
391 return rc; 568 return rc;
392 569
393 /* if any of auth flags (ie not sign or seal) are overriden use them */
394 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
395 secFlags = ses->overrideSecFlg; /* BB FIXME fix sign flags? */
396 else /* if override flags set only sign/seal OR them with global auth */
397 secFlags = global_secflags | ses->overrideSecFlg;
398
399 cifs_dbg(FYI, "secFlags 0x%x\n", secFlags);
400
401 pSMB->hdr.Mid = get_next_mid(server); 570 pSMB->hdr.Mid = get_next_mid(server);
402 pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS); 571 pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
403 572
404 if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) 573 if (should_set_ext_sec_flag(ses->sectype)) {
405 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; 574 cifs_dbg(FYI, "Requesting extended security.");
406 else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
407 cifs_dbg(FYI, "Kerberos only mechanism, enable extended security\n");
408 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
409 } else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
410 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
411 else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) {
412 cifs_dbg(FYI, "NTLMSSP only mechanism, enable extended security\n");
413 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; 575 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
414 } 576 }
415 577
@@ -436,127 +598,21 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
436 could not negotiate a common dialect */ 598 could not negotiate a common dialect */
437 rc = -EOPNOTSUPP; 599 rc = -EOPNOTSUPP;
438 goto neg_err_exit; 600 goto neg_err_exit;
439#ifdef CONFIG_CIFS_WEAK_PW_HASH
440 } else if ((pSMBr->hdr.WordCount == 13)
441 && ((server->dialect == LANMAN_PROT)
442 || (server->dialect == LANMAN2_PROT))) {
443 __s16 tmp;
444 struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr;
445
446 if ((secFlags & CIFSSEC_MAY_LANMAN) ||
447 (secFlags & CIFSSEC_MAY_PLNTXT))
448 server->secType = LANMAN;
449 else {
450 cifs_dbg(VFS, "mount failed weak security disabled in /proc/fs/cifs/SecurityFlags\n");
451 rc = -EOPNOTSUPP;
452 goto neg_err_exit;
453 }
454 server->sec_mode = le16_to_cpu(rsp->SecurityMode);
455 server->maxReq = min_t(unsigned int,
456 le16_to_cpu(rsp->MaxMpxCount),
457 cifs_max_pending);
458 set_credits(server, server->maxReq);
459 server->maxBuf = le16_to_cpu(rsp->MaxBufSize);
460 server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs);
461 /* even though we do not use raw we might as well set this
462 accurately, in case we ever find a need for it */
463 if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) {
464 server->max_rw = 0xFF00;
465 server->capabilities = CAP_MPX_MODE | CAP_RAW_MODE;
466 } else {
467 server->max_rw = 0;/* do not need to use raw anyway */
468 server->capabilities = CAP_MPX_MODE;
469 }
470 tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone);
471 if (tmp == -1) {
472 /* OS/2 often does not set timezone therefore
473 * we must use server time to calc time zone.
474 * Could deviate slightly from the right zone.
475 * Smallest defined timezone difference is 15 minutes
476 * (i.e. Nepal). Rounding up/down is done to match
477 * this requirement.
478 */
479 int val, seconds, remain, result;
480 struct timespec ts, utc;
481 utc = CURRENT_TIME;
482 ts = cnvrtDosUnixTm(rsp->SrvTime.Date,
483 rsp->SrvTime.Time, 0);
484 cifs_dbg(FYI, "SrvTime %d sec since 1970 (utc: %d) diff: %d\n",
485 (int)ts.tv_sec, (int)utc.tv_sec,
486 (int)(utc.tv_sec - ts.tv_sec));
487 val = (int)(utc.tv_sec - ts.tv_sec);
488 seconds = abs(val);
489 result = (seconds / MIN_TZ_ADJ) * MIN_TZ_ADJ;
490 remain = seconds % MIN_TZ_ADJ;
491 if (remain >= (MIN_TZ_ADJ / 2))
492 result += MIN_TZ_ADJ;
493 if (val < 0)
494 result = -result;
495 server->timeAdj = result;
496 } else {
497 server->timeAdj = (int)tmp;
498 server->timeAdj *= 60; /* also in seconds */
499 }
500 cifs_dbg(FYI, "server->timeAdj: %d seconds\n", server->timeAdj);
501
502
503 /* BB get server time for time conversions and add
504 code to use it and timezone since this is not UTC */
505
506 if (rsp->EncryptionKeyLength ==
507 cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
508 memcpy(ses->server->cryptkey, rsp->EncryptionKey,
509 CIFS_CRYPTO_KEY_SIZE);
510 } else if (server->sec_mode & SECMODE_PW_ENCRYPT) {
511 rc = -EIO; /* need cryptkey unless plain text */
512 goto neg_err_exit;
513 }
514
515 cifs_dbg(FYI, "LANMAN negotiated\n");
516 /* we will not end up setting signing flags - as no signing
517 was in LANMAN and server did not return the flags on */
518 goto signing_check;
519#else /* weak security disabled */
520 } else if (pSMBr->hdr.WordCount == 13) { 601 } else if (pSMBr->hdr.WordCount == 13) {
521 cifs_dbg(VFS, "mount failed, cifs module not built with CIFS_WEAK_PW_HASH support\n"); 602 server->negflavor = CIFS_NEGFLAVOR_LANMAN;
522 rc = -EOPNOTSUPP; 603 rc = decode_lanman_negprot_rsp(server, pSMBr);
523#endif /* WEAK_PW_HASH */ 604 goto signing_check;
524 goto neg_err_exit;
525 } else if (pSMBr->hdr.WordCount != 17) { 605 } else if (pSMBr->hdr.WordCount != 17) {
526 /* unknown wct */ 606 /* unknown wct */
527 rc = -EOPNOTSUPP; 607 rc = -EOPNOTSUPP;
528 goto neg_err_exit; 608 goto neg_err_exit;
529 } 609 }
530 /* else wct == 17 NTLM */ 610 /* else wct == 17, NTLM or better */
611
531 server->sec_mode = pSMBr->SecurityMode; 612 server->sec_mode = pSMBr->SecurityMode;
532 if ((server->sec_mode & SECMODE_USER) == 0) 613 if ((server->sec_mode & SECMODE_USER) == 0)
533 cifs_dbg(FYI, "share mode security\n"); 614 cifs_dbg(FYI, "share mode security\n");
534 615
535 if ((server->sec_mode & SECMODE_PW_ENCRYPT) == 0)
536#ifdef CONFIG_CIFS_WEAK_PW_HASH
537 if ((secFlags & CIFSSEC_MAY_PLNTXT) == 0)
538#endif /* CIFS_WEAK_PW_HASH */
539 cifs_dbg(VFS, "Server requests plain text password but client support disabled\n");
540
541 if ((secFlags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
542 server->secType = NTLMv2;
543 else if (secFlags & CIFSSEC_MAY_NTLM)
544 server->secType = NTLM;
545 else if (secFlags & CIFSSEC_MAY_NTLMV2)
546 server->secType = NTLMv2;
547 else if (secFlags & CIFSSEC_MAY_KRB5)
548 server->secType = Kerberos;
549 else if (secFlags & CIFSSEC_MAY_NTLMSSP)
550 server->secType = RawNTLMSSP;
551 else if (secFlags & CIFSSEC_MAY_LANMAN)
552 server->secType = LANMAN;
553 else {
554 rc = -EOPNOTSUPP;
555 cifs_dbg(VFS, "Invalid security type\n");
556 goto neg_err_exit;
557 }
558 /* else ... any others ...? */
559
560 /* one byte, so no need to convert this or EncryptionKeyLen from 616 /* one byte, so no need to convert this or EncryptionKeyLen from
561 little endian */ 617 little endian */
562 server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount), 618 server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount),
@@ -569,90 +625,26 @@ CIFSSMBNegotiate(const unsigned int xid, struct cifs_ses *ses)
569 server->capabilities = le32_to_cpu(pSMBr->Capabilities); 625 server->capabilities = le32_to_cpu(pSMBr->Capabilities);
570 server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone); 626 server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
571 server->timeAdj *= 60; 627 server->timeAdj *= 60;
628
572 if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) { 629 if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
630 server->negflavor = CIFS_NEGFLAVOR_UNENCAP;
573 memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey, 631 memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey,
574 CIFS_CRYPTO_KEY_SIZE); 632 CIFS_CRYPTO_KEY_SIZE);
575 } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC || 633 } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC ||
576 server->capabilities & CAP_EXTENDED_SECURITY) && 634 server->capabilities & CAP_EXTENDED_SECURITY) &&
577 (pSMBr->EncryptionKeyLength == 0)) { 635 (pSMBr->EncryptionKeyLength == 0)) {
578 /* decode security blob */ 636 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
579 count = get_bcc(&pSMBr->hdr); 637 rc = decode_ext_sec_blob(ses, pSMBr);
580 if (count < 16) {
581 rc = -EIO;
582 goto neg_err_exit;
583 }
584 spin_lock(&cifs_tcp_ses_lock);
585 if (server->srv_count > 1) {
586 spin_unlock(&cifs_tcp_ses_lock);
587 if (memcmp(server->server_GUID,
588 pSMBr->u.extended_response.
589 GUID, 16) != 0) {
590 cifs_dbg(FYI, "server UID changed\n");
591 memcpy(server->server_GUID,
592 pSMBr->u.extended_response.GUID,
593 16);
594 }
595 } else {
596 spin_unlock(&cifs_tcp_ses_lock);
597 memcpy(server->server_GUID,
598 pSMBr->u.extended_response.GUID, 16);
599 }
600
601 if (count == 16) {
602 server->secType = RawNTLMSSP;
603 } else {
604 rc = decode_negTokenInit(pSMBr->u.extended_response.
605 SecurityBlob, count - 16,
606 server);
607 if (rc == 1)
608 rc = 0;
609 else
610 rc = -EINVAL;
611 if (server->secType == Kerberos) {
612 if (!server->sec_kerberos &&
613 !server->sec_mskerberos)
614 rc = -EOPNOTSUPP;
615 } else if (server->secType == RawNTLMSSP) {
616 if (!server->sec_ntlmssp)
617 rc = -EOPNOTSUPP;
618 } else
619 rc = -EOPNOTSUPP;
620 }
621 } else if (server->sec_mode & SECMODE_PW_ENCRYPT) { 638 } else if (server->sec_mode & SECMODE_PW_ENCRYPT) {
622 rc = -EIO; /* no crypt key only if plain text pwd */ 639 rc = -EIO; /* no crypt key only if plain text pwd */
623 goto neg_err_exit;
624 } else
625 server->capabilities &= ~CAP_EXTENDED_SECURITY;
626
627#ifdef CONFIG_CIFS_WEAK_PW_HASH
628signing_check:
629#endif
630 if ((secFlags & CIFSSEC_MAY_SIGN) == 0) {
631 /* MUST_SIGN already includes the MAY_SIGN FLAG
632 so if this is zero it means that signing is disabled */
633 cifs_dbg(FYI, "Signing disabled\n");
634 if (server->sec_mode & SECMODE_SIGN_REQUIRED) {
635 cifs_dbg(VFS, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n");
636 rc = -EOPNOTSUPP;
637 }
638 server->sec_mode &=
639 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
640 } else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
641 /* signing required */
642 cifs_dbg(FYI, "Must sign - secFlags 0x%x\n", secFlags);
643 if ((server->sec_mode &
644 (SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
645 cifs_dbg(VFS, "signing required but server lacks support\n");
646 rc = -EOPNOTSUPP;
647 } else
648 server->sec_mode |= SECMODE_SIGN_REQUIRED;
649 } else { 640 } else {
650 /* signing optional ie CIFSSEC_MAY_SIGN */ 641 server->negflavor = CIFS_NEGFLAVOR_UNENCAP;
651 if ((server->sec_mode & SECMODE_SIGN_REQUIRED) == 0) 642 server->capabilities &= ~CAP_EXTENDED_SECURITY;
652 server->sec_mode &=
653 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
654 } 643 }
655 644
645signing_check:
646 if (!rc)
647 rc = cifs_enable_signing(server, ses->sign);
656neg_err_exit: 648neg_err_exit:
657 cifs_buf_release(pSMB); 649 cifs_buf_release(pSMB);
658 650
@@ -777,9 +769,8 @@ CIFSSMBLogoff(const unsigned int xid, struct cifs_ses *ses)
777 769
778 pSMB->hdr.Mid = get_next_mid(ses->server); 770 pSMB->hdr.Mid = get_next_mid(ses->server);
779 771
780 if (ses->server->sec_mode & 772 if (ses->server->sign)
781 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) 773 pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
782 pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
783 774
784 pSMB->hdr.Uid = ses->Suid; 775 pSMB->hdr.Uid = ses->Suid;
785 776
@@ -1540,8 +1531,7 @@ cifs_readv_callback(struct mid_q_entry *mid)
1540 switch (mid->mid_state) { 1531 switch (mid->mid_state) {
1541 case MID_RESPONSE_RECEIVED: 1532 case MID_RESPONSE_RECEIVED:
1542 /* result already set, check signature */ 1533 /* result already set, check signature */
1543 if (server->sec_mode & 1534 if (server->sign) {
1544 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
1545 int rc = 0; 1535 int rc = 0;
1546 1536
1547 rc = cifs_verify_signature(&rqst, server, 1537 rc = cifs_verify_signature(&rqst, server,
@@ -3940,6 +3930,7 @@ QFileInfoRetry:
3940 pSMB->Pad = 0; 3930 pSMB->Pad = 0;
3941 pSMB->Fid = netfid; 3931 pSMB->Fid = netfid;
3942 inc_rfc1001_len(pSMB, byte_count); 3932 inc_rfc1001_len(pSMB, byte_count);
3933 pSMB->t2.ByteCount = cpu_to_le16(byte_count);
3943 3934
3944 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, 3935 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3945 (struct smb_hdr *) pSMBr, &bytes_returned, 0); 3936 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
@@ -4108,6 +4099,7 @@ UnixQFileInfoRetry:
4108 pSMB->Pad = 0; 4099 pSMB->Pad = 0;
4109 pSMB->Fid = netfid; 4100 pSMB->Fid = netfid;
4110 inc_rfc1001_len(pSMB, byte_count); 4101 inc_rfc1001_len(pSMB, byte_count);
4102 pSMB->t2.ByteCount = cpu_to_le16(byte_count);
4111 4103
4112 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, 4104 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4113 (struct smb_hdr *) pSMBr, &bytes_returned, 0); 4105 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
@@ -4794,11 +4786,8 @@ getDFSRetry:
4794 strncpy(pSMB->RequestFileName, search_name, name_len); 4786 strncpy(pSMB->RequestFileName, search_name, name_len);
4795 } 4787 }
4796 4788
4797 if (ses->server) { 4789 if (ses->server && ses->server->sign)
4798 if (ses->server->sec_mode & 4790 pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
4799 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
4800 pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
4801 }
4802 4791
4803 pSMB->hdr.Uid = ses->Suid; 4792 pSMB->hdr.Uid = ses->Suid;
4804 4793
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e3bc39bb9d12..afcb8a1a33b7 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -85,7 +85,7 @@ enum {
85 Opt_acl, Opt_noacl, Opt_locallease, 85 Opt_acl, Opt_noacl, Opt_locallease,
86 Opt_sign, Opt_seal, Opt_noac, 86 Opt_sign, Opt_seal, Opt_noac,
87 Opt_fsc, Opt_mfsymlinks, 87 Opt_fsc, Opt_mfsymlinks,
88 Opt_multiuser, Opt_sloppy, 88 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
89 89
90 /* Mount options which take numeric value */ 90 /* Mount options which take numeric value */
91 Opt_backupuid, Opt_backupgid, Opt_uid, 91 Opt_backupuid, Opt_backupgid, Opt_uid,
@@ -165,6 +165,7 @@ static const match_table_t cifs_mount_option_tokens = {
165 { Opt_mfsymlinks, "mfsymlinks" }, 165 { Opt_mfsymlinks, "mfsymlinks" },
166 { Opt_multiuser, "multiuser" }, 166 { Opt_multiuser, "multiuser" },
167 { Opt_sloppy, "sloppy" }, 167 { Opt_sloppy, "sloppy" },
168 { Opt_nosharesock, "nosharesock" },
168 169
169 { Opt_backupuid, "backupuid=%s" }, 170 { Opt_backupuid, "backupuid=%s" },
170 { Opt_backupgid, "backupgid=%s" }, 171 { Opt_backupgid, "backupgid=%s" },
@@ -275,6 +276,7 @@ static const match_table_t cifs_smb_version_tokens = {
275 { Smb_20, SMB20_VERSION_STRING}, 276 { Smb_20, SMB20_VERSION_STRING},
276 { Smb_21, SMB21_VERSION_STRING }, 277 { Smb_21, SMB21_VERSION_STRING },
277 { Smb_30, SMB30_VERSION_STRING }, 278 { Smb_30, SMB30_VERSION_STRING },
279 { Smb_302, SMB302_VERSION_STRING },
278}; 280};
279 281
280static int ip_connect(struct TCP_Server_Info *server); 282static int ip_connect(struct TCP_Server_Info *server);
@@ -1024,44 +1026,48 @@ static int cifs_parse_security_flavors(char *value,
1024 1026
1025 substring_t args[MAX_OPT_ARGS]; 1027 substring_t args[MAX_OPT_ARGS];
1026 1028
1029 /*
1030 * With mount options, the last one should win. Reset any existing
1031 * settings back to default.
1032 */
1033 vol->sectype = Unspecified;
1034 vol->sign = false;
1035
1027 switch (match_token(value, cifs_secflavor_tokens, args)) { 1036 switch (match_token(value, cifs_secflavor_tokens, args)) {
1028 case Opt_sec_krb5:
1029 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_SIGN;
1030 break;
1031 case Opt_sec_krb5i:
1032 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
1033 break;
1034 case Opt_sec_krb5p: 1037 case Opt_sec_krb5p:
1035 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ 1038 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1036 cifs_dbg(VFS, "Krb5 cifs privacy not supported\n"); 1039 return 1;
1037 break; 1040 case Opt_sec_krb5i:
1038 case Opt_sec_ntlmssp: 1041 vol->sign = true;
1039 vol->secFlg |= CIFSSEC_MAY_NTLMSSP; 1042 /* Fallthrough */
1043 case Opt_sec_krb5:
1044 vol->sectype = Kerberos;
1040 break; 1045 break;
1041 case Opt_sec_ntlmsspi: 1046 case Opt_sec_ntlmsspi:
1042 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; 1047 vol->sign = true;
1043 break; 1048 /* Fallthrough */
1044 case Opt_ntlm: 1049 case Opt_sec_ntlmssp:
1045 /* ntlm is default so can be turned off too */ 1050 vol->sectype = RawNTLMSSP;
1046 vol->secFlg |= CIFSSEC_MAY_NTLM;
1047 break; 1051 break;
1048 case Opt_sec_ntlmi: 1052 case Opt_sec_ntlmi:
1049 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; 1053 vol->sign = true;
1050 break; 1054 /* Fallthrough */
1051 case Opt_sec_ntlmv2: 1055 case Opt_ntlm:
1052 vol->secFlg |= CIFSSEC_MAY_NTLMV2; 1056 vol->sectype = NTLM;
1053 break; 1057 break;
1054 case Opt_sec_ntlmv2i: 1058 case Opt_sec_ntlmv2i:
1055 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; 1059 vol->sign = true;
1060 /* Fallthrough */
1061 case Opt_sec_ntlmv2:
1062 vol->sectype = NTLMv2;
1056 break; 1063 break;
1057#ifdef CONFIG_CIFS_WEAK_PW_HASH 1064#ifdef CONFIG_CIFS_WEAK_PW_HASH
1058 case Opt_sec_lanman: 1065 case Opt_sec_lanman:
1059 vol->secFlg |= CIFSSEC_MAY_LANMAN; 1066 vol->sectype = LANMAN;
1060 break; 1067 break;
1061#endif 1068#endif
1062 case Opt_sec_none: 1069 case Opt_sec_none:
1063 vol->nullauth = 1; 1070 vol->nullauth = 1;
1064 vol->secFlg |= CIFSSEC_MAY_NTLM;
1065 break; 1071 break;
1066 default: 1072 default:
1067 cifs_dbg(VFS, "bad security option: %s\n", value); 1073 cifs_dbg(VFS, "bad security option: %s\n", value);
@@ -1119,6 +1125,10 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
1119 vol->ops = &smb30_operations; 1125 vol->ops = &smb30_operations;
1120 vol->vals = &smb30_values; 1126 vol->vals = &smb30_values;
1121 break; 1127 break;
1128 case Smb_302:
1129 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1130 vol->vals = &smb302_values;
1131 break;
1122#endif 1132#endif
1123 default: 1133 default:
1124 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); 1134 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
@@ -1424,7 +1434,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
1424 vol->local_lease = 1; 1434 vol->local_lease = 1;
1425 break; 1435 break;
1426 case Opt_sign: 1436 case Opt_sign:
1427 vol->secFlg |= CIFSSEC_MUST_SIGN; 1437 vol->sign = true;
1428 break; 1438 break;
1429 case Opt_seal: 1439 case Opt_seal:
1430 /* we do not do the following in secFlags because seal 1440 /* we do not do the following in secFlags because seal
@@ -1455,6 +1465,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
1455 case Opt_sloppy: 1465 case Opt_sloppy:
1456 sloppy = true; 1466 sloppy = true;
1457 break; 1467 break;
1468 case Opt_nosharesock:
1469 vol->nosharesock = true;
1470 break;
1458 1471
1459 /* Numeric Values */ 1472 /* Numeric Values */
1460 case Opt_backupuid: 1473 case Opt_backupuid:
@@ -1978,47 +1991,21 @@ match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1978static bool 1991static bool
1979match_security(struct TCP_Server_Info *server, struct smb_vol *vol) 1992match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1980{ 1993{
1981 unsigned int secFlags; 1994 /*
1982 1995 * The select_sectype function should either return the vol->sectype
1983 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) 1996 * that was specified, or "Unspecified" if that sectype was not
1984 secFlags = vol->secFlg; 1997 * compatible with the given NEGOTIATE request.
1985 else 1998 */
1986 secFlags = global_secflags | vol->secFlg; 1999 if (select_sectype(server, vol->sectype) == Unspecified)
1987
1988 switch (server->secType) {
1989 case LANMAN:
1990 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1991 return false;
1992 break;
1993 case NTLMv2:
1994 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1995 return false;
1996 break;
1997 case NTLM:
1998 if (!(secFlags & CIFSSEC_MAY_NTLM))
1999 return false;
2000 break;
2001 case Kerberos:
2002 if (!(secFlags & CIFSSEC_MAY_KRB5))
2003 return false;
2004 break;
2005 case RawNTLMSSP:
2006 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
2007 return false;
2008 break;
2009 default:
2010 /* shouldn't happen */
2011 return false; 2000 return false;
2012 }
2013 2001
2014 /* now check if signing mode is acceptable */ 2002 /*
2015 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && 2003 * Now check if signing mode is acceptable. No need to check
2016 (server->sec_mode & SECMODE_SIGN_REQUIRED)) 2004 * global_secflags at this point since if MUST_SIGN is set then
2017 return false; 2005 * the server->sign had better be too.
2018 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && 2006 */
2019 (server->sec_mode & 2007 if (vol->sign && !server->sign)
2020 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) 2008 return false;
2021 return false;
2022 2009
2023 return true; 2010 return true;
2024} 2011}
@@ -2027,6 +2014,9 @@ static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
2027{ 2014{
2028 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; 2015 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2029 2016
2017 if (vol->nosharesock)
2018 return 0;
2019
2030 if ((server->vals != vol->vals) || (server->ops != vol->ops)) 2020 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2031 return 0; 2021 return 0;
2032 2022
@@ -2216,7 +2206,11 @@ out_err:
2216 2206
2217static int match_session(struct cifs_ses *ses, struct smb_vol *vol) 2207static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
2218{ 2208{
2219 switch (ses->server->secType) { 2209 if (vol->sectype != Unspecified &&
2210 vol->sectype != ses->sectype)
2211 return 0;
2212
2213 switch (ses->sectype) {
2220 case Kerberos: 2214 case Kerberos:
2221 if (!uid_eq(vol->cred_uid, ses->cred_uid)) 2215 if (!uid_eq(vol->cred_uid, ses->cred_uid))
2222 return 0; 2216 return 0;
@@ -2493,7 +2487,8 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2493 ses->cred_uid = volume_info->cred_uid; 2487 ses->cred_uid = volume_info->cred_uid;
2494 ses->linux_uid = volume_info->linux_uid; 2488 ses->linux_uid = volume_info->linux_uid;
2495 2489
2496 ses->overrideSecFlg = volume_info->secFlg; 2490 ses->sectype = volume_info->sectype;
2491 ses->sign = volume_info->sign;
2497 2492
2498 mutex_lock(&ses->session_mutex); 2493 mutex_lock(&ses->session_mutex);
2499 rc = cifs_negotiate_protocol(xid, ses); 2494 rc = cifs_negotiate_protocol(xid, ses);
@@ -3656,7 +3651,7 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
3656 NTLMv2 password here) */ 3651 NTLMv2 password here) */
3657#ifdef CONFIG_CIFS_WEAK_PW_HASH 3652#ifdef CONFIG_CIFS_WEAK_PW_HASH
3658 if ((global_secflags & CIFSSEC_MAY_LANMAN) && 3653 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3659 (ses->server->secType == LANMAN)) 3654 (ses->sectype == LANMAN))
3660 calc_lanman_hash(tcon->password, ses->server->cryptkey, 3655 calc_lanman_hash(tcon->password, ses->server->cryptkey,
3661 ses->server->sec_mode & 3656 ses->server->sec_mode &
3662 SECMODE_PW_ENCRYPT ? true : false, 3657 SECMODE_PW_ENCRYPT ? true : false,
@@ -3674,8 +3669,7 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
3674 } 3669 }
3675 } 3670 }
3676 3671
3677 if (ses->server->sec_mode & 3672 if (ses->server->sign)
3678 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3679 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; 3673 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3680 3674
3681 if (ses->capabilities & CAP_STATUS32) { 3675 if (ses->capabilities & CAP_STATUS32) {
@@ -3738,7 +3732,7 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
3738 } 3732 }
3739 bcc_ptr += length + 1; 3733 bcc_ptr += length + 1;
3740 bytes_left -= (length + 1); 3734 bytes_left -= (length + 1);
3741 strncpy(tcon->treeName, tree, MAX_TREE_SIZE); 3735 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
3742 3736
3743 /* mostly informational -- no need to fail on error here */ 3737 /* mostly informational -- no need to fail on error here */
3744 kfree(tcon->nativeFileSystem); 3738 kfree(tcon->nativeFileSystem);
@@ -3827,7 +3821,6 @@ cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3827 int rc = -ENOSYS; 3821 int rc = -ENOSYS;
3828 struct TCP_Server_Info *server = ses->server; 3822 struct TCP_Server_Info *server = ses->server;
3829 3823
3830 ses->flags = 0;
3831 ses->capabilities = server->capabilities; 3824 ses->capabilities = server->capabilities;
3832 if (linuxExtEnabled == 0) 3825 if (linuxExtEnabled == 0)
3833 ses->capabilities &= (~server->vals->cap_unix); 3826 ses->capabilities &= (~server->vals->cap_unix);
@@ -3848,6 +3841,8 @@ cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3848 server->sequence_number = 0x2; 3841 server->sequence_number = 0x2;
3849 server->session_estab = true; 3842 server->session_estab = true;
3850 ses->auth_key.response = NULL; 3843 ses->auth_key.response = NULL;
3844 if (server->ops->generate_signingkey)
3845 server->ops->generate_signingkey(server);
3851 } 3846 }
3852 mutex_unlock(&server->srv_mutex); 3847 mutex_unlock(&server->srv_mutex);
3853 3848
@@ -3870,23 +3865,11 @@ cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3870static int 3865static int
3871cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) 3866cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3872{ 3867{
3873 switch (ses->server->secType) { 3868 vol->sectype = ses->sectype;
3874 case Kerberos: 3869
3875 vol->secFlg = CIFSSEC_MUST_KRB5; 3870 /* krb5 is special, since we don't need username or pw */
3871 if (vol->sectype == Kerberos)
3876 return 0; 3872 return 0;
3877 case NTLMv2:
3878 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3879 break;
3880 case NTLM:
3881 vol->secFlg = CIFSSEC_MUST_NTLM;
3882 break;
3883 case RawNTLMSSP:
3884 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3885 break;
3886 case LANMAN:
3887 vol->secFlg = CIFSSEC_MUST_LANMAN;
3888 break;
3889 }
3890 3873
3891 return cifs_set_cifscreds(vol, ses); 3874 return cifs_set_cifscreds(vol, ses);
3892} 3875}
@@ -3912,6 +3895,8 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
3912 vol_info->nocase = master_tcon->nocase; 3895 vol_info->nocase = master_tcon->nocase;
3913 vol_info->local_lease = master_tcon->local_lease; 3896 vol_info->local_lease = master_tcon->local_lease;
3914 vol_info->no_linux_ext = !master_tcon->unix_ext; 3897 vol_info->no_linux_ext = !master_tcon->unix_ext;
3898 vol_info->sectype = master_tcon->ses->sectype;
3899 vol_info->sign = master_tcon->ses->sign;
3915 3900
3916 rc = cifs_set_vol_auth(vol_info, master_tcon->ses); 3901 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3917 if (rc) { 3902 if (rc) {
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 1bec014779fd..f7d4b2285efe 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -267,8 +267,7 @@ header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
267 if (treeCon->nocase) 267 if (treeCon->nocase)
268 buffer->Flags |= SMBFLG_CASELESS; 268 buffer->Flags |= SMBFLG_CASELESS;
269 if ((treeCon->ses) && (treeCon->ses->server)) 269 if ((treeCon->ses) && (treeCon->ses->server))
270 if (treeCon->ses->server->sec_mode & 270 if (treeCon->ses->server->sign)
271 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
272 buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; 271 buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
273 } 272 }
274 273
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index f1213799de1a..ab8778469394 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -126,6 +126,22 @@ out:
126 dput(dentry); 126 dput(dentry);
127} 127}
128 128
129/*
130 * Is it possible that this directory might turn out to be a DFS referral
131 * once we go to try and use it?
132 */
133static bool
134cifs_dfs_is_possible(struct cifs_sb_info *cifs_sb)
135{
136#ifdef CONFIG_CIFS_DFS_UPCALL
137 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
138
139 if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
140 return true;
141#endif
142 return false;
143}
144
129static void 145static void
130cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb) 146cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
131{ 147{
@@ -135,6 +151,19 @@ cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
135 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { 151 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
136 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; 152 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
137 fattr->cf_dtype = DT_DIR; 153 fattr->cf_dtype = DT_DIR;
154 /*
155 * Windows CIFS servers generally make DFS referrals look
156 * like directories in FIND_* responses with the reparse
157 * attribute flag also set (since DFS junctions are
158 * reparse points). We must revalidate at least these
159 * directory inodes before trying to use them (if
160 * they are DFS we will get PATH_NOT_COVERED back
161 * when queried directly and can then try to connect
162 * to the DFS target)
163 */
164 if (cifs_dfs_is_possible(cifs_sb) &&
165 (fattr->cf_cifsattrs & ATTR_REPARSE))
166 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
138 } else { 167 } else {
139 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; 168 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
140 fattr->cf_dtype = DT_REG; 169 fattr->cf_dtype = DT_REG;
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index f230571a7ab3..79358e341fd2 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -138,8 +138,7 @@ static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB)
138 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS | 138 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
139 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X; 139 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
140 140
141 if (ses->server->sec_mode & 141 if (ses->server->sign)
142 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
143 pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE; 142 pSMB->req.hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
144 143
145 if (ses->capabilities & CAP_UNICODE) { 144 if (ses->capabilities & CAP_UNICODE) {
@@ -310,11 +309,10 @@ decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifs_ses *ses,
310 return; 309 return;
311} 310}
312 311
313static int decode_ascii_ssetup(char **pbcc_area, __u16 bleft, 312static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
314 struct cifs_ses *ses, 313 struct cifs_ses *ses,
315 const struct nls_table *nls_cp) 314 const struct nls_table *nls_cp)
316{ 315{
317 int rc = 0;
318 int len; 316 int len;
319 char *bcc_ptr = *pbcc_area; 317 char *bcc_ptr = *pbcc_area;
320 318
@@ -322,24 +320,22 @@ static int decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
322 320
323 len = strnlen(bcc_ptr, bleft); 321 len = strnlen(bcc_ptr, bleft);
324 if (len >= bleft) 322 if (len >= bleft)
325 return rc; 323 return;
326 324
327 kfree(ses->serverOS); 325 kfree(ses->serverOS);
328 326
329 ses->serverOS = kzalloc(len + 1, GFP_KERNEL); 327 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
330 if (ses->serverOS) 328 if (ses->serverOS)
331 strncpy(ses->serverOS, bcc_ptr, len); 329 strncpy(ses->serverOS, bcc_ptr, len);
332 if (strncmp(ses->serverOS, "OS/2", 4) == 0) { 330 if (strncmp(ses->serverOS, "OS/2", 4) == 0)
333 cifs_dbg(FYI, "OS/2 server\n"); 331 cifs_dbg(FYI, "OS/2 server\n");
334 ses->flags |= CIFS_SES_OS2;
335 }
336 332
337 bcc_ptr += len + 1; 333 bcc_ptr += len + 1;
338 bleft -= len + 1; 334 bleft -= len + 1;
339 335
340 len = strnlen(bcc_ptr, bleft); 336 len = strnlen(bcc_ptr, bleft);
341 if (len >= bleft) 337 if (len >= bleft)
342 return rc; 338 return;
343 339
344 kfree(ses->serverNOS); 340 kfree(ses->serverNOS);
345 341
@@ -352,7 +348,7 @@ static int decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
352 348
353 len = strnlen(bcc_ptr, bleft); 349 len = strnlen(bcc_ptr, bleft);
354 if (len > bleft) 350 if (len > bleft)
355 return rc; 351 return;
356 352
357 /* No domain field in LANMAN case. Domain is 353 /* No domain field in LANMAN case. Domain is
358 returned by old servers in the SMB negprot response */ 354 returned by old servers in the SMB negprot response */
@@ -360,8 +356,6 @@ static int decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
360 but thus do return domain here we could add parsing 356 but thus do return domain here we could add parsing
361 for it later, but it is not very important */ 357 for it later, but it is not very important */
362 cifs_dbg(FYI, "ascii: bytes left %d\n", bleft); 358 cifs_dbg(FYI, "ascii: bytes left %d\n", bleft);
363
364 return rc;
365} 359}
366 360
367int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, 361int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len,
@@ -432,8 +426,7 @@ void build_ntlmssp_negotiate_blob(unsigned char *pbuffer,
432 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | 426 flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET |
433 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | 427 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
434 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; 428 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
435 if (ses->server->sec_mode & 429 if (ses->server->sign) {
436 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
437 flags |= NTLMSSP_NEGOTIATE_SIGN; 430 flags |= NTLMSSP_NEGOTIATE_SIGN;
438 if (!ses->server->session_estab) 431 if (!ses->server->session_estab)
439 flags |= NTLMSSP_NEGOTIATE_KEY_XCH; 432 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
@@ -471,8 +464,7 @@ int build_ntlmssp_auth_blob(unsigned char *pbuffer,
471 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | 464 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO |
472 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | 465 NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE |
473 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; 466 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC;
474 if (ses->server->sec_mode & 467 if (ses->server->sign) {
475 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
476 flags |= NTLMSSP_NEGOTIATE_SIGN; 468 flags |= NTLMSSP_NEGOTIATE_SIGN;
477 if (!ses->server->session_estab) 469 if (!ses->server->session_estab)
478 flags |= NTLMSSP_NEGOTIATE_KEY_XCH; 470 flags |= NTLMSSP_NEGOTIATE_KEY_XCH;
@@ -558,6 +550,56 @@ setup_ntlmv2_ret:
558 return rc; 550 return rc;
559} 551}
560 552
553enum securityEnum
554select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
555{
556 switch (server->negflavor) {
557 case CIFS_NEGFLAVOR_EXTENDED:
558 switch (requested) {
559 case Kerberos:
560 case RawNTLMSSP:
561 return requested;
562 case Unspecified:
563 if (server->sec_ntlmssp &&
564 (global_secflags & CIFSSEC_MAY_NTLMSSP))
565 return RawNTLMSSP;
566 if ((server->sec_kerberos || server->sec_mskerberos) &&
567 (global_secflags & CIFSSEC_MAY_KRB5))
568 return Kerberos;
569 /* Fallthrough */
570 default:
571 return Unspecified;
572 }
573 case CIFS_NEGFLAVOR_UNENCAP:
574 switch (requested) {
575 case NTLM:
576 case NTLMv2:
577 return requested;
578 case Unspecified:
579 if (global_secflags & CIFSSEC_MAY_NTLMV2)
580 return NTLMv2;
581 if (global_secflags & CIFSSEC_MAY_NTLM)
582 return NTLM;
583 /* Fallthrough */
584 default:
585 return Unspecified;
586 }
587 case CIFS_NEGFLAVOR_LANMAN:
588 switch (requested) {
589 case LANMAN:
590 return requested;
591 case Unspecified:
592 if (global_secflags & CIFSSEC_MAY_LANMAN)
593 return LANMAN;
594 /* Fallthrough */
595 default:
596 return Unspecified;
597 }
598 default:
599 return Unspecified;
600 }
601}
602
561int 603int
562CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses, 604CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
563 const struct nls_table *nls_cp) 605 const struct nls_table *nls_cp)
@@ -579,11 +621,18 @@ CIFS_SessSetup(const unsigned int xid, struct cifs_ses *ses,
579 u16 blob_len; 621 u16 blob_len;
580 char *ntlmsspblob = NULL; 622 char *ntlmsspblob = NULL;
581 623
582 if (ses == NULL) 624 if (ses == NULL) {
625 WARN(1, "%s: ses == NULL!", __func__);
583 return -EINVAL; 626 return -EINVAL;
627 }
584 628
585 type = ses->server->secType; 629 type = select_sectype(ses->server, ses->sectype);
586 cifs_dbg(FYI, "sess setup type %d\n", type); 630 cifs_dbg(FYI, "sess setup type %d\n", type);
631 if (type == Unspecified) {
632 cifs_dbg(VFS, "Unable to select appropriate authentication method!");
633 return -EINVAL;
634 }
635
587 if (type == RawNTLMSSP) { 636 if (type == RawNTLMSSP) {
588 /* if memory allocation is successful, caller of this function 637 /* if memory allocation is successful, caller of this function
589 * frees it. 638 * frees it.
@@ -643,8 +692,6 @@ ssetup_ntlmssp_authenticate:
643 } 692 }
644 bcc_ptr = str_area; 693 bcc_ptr = str_area;
645 694
646 ses->flags &= ~CIFS_SES_LANMAN;
647
648 iov[1].iov_base = NULL; 695 iov[1].iov_base = NULL;
649 iov[1].iov_len = 0; 696 iov[1].iov_len = 0;
650 697
@@ -668,7 +715,6 @@ ssetup_ntlmssp_authenticate:
668 ses->server->sec_mode & SECMODE_PW_ENCRYPT ? 715 ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
669 true : false, lnm_session_key); 716 true : false, lnm_session_key);
670 717
671 ses->flags |= CIFS_SES_LANMAN;
672 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE); 718 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
673 bcc_ptr += CIFS_AUTH_RESP_SIZE; 719 bcc_ptr += CIFS_AUTH_RESP_SIZE;
674 720
@@ -938,8 +984,7 @@ ssetup_ntlmssp_authenticate:
938 } 984 }
939 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp); 985 decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
940 } else { 986 } else {
941 rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining, 987 decode_ascii_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
942 ses, nls_cp);
943 } 988 }
944 989
945ssetup_exit: 990ssetup_exit:
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 3efdb9d5c0b8..e813f04511d8 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -449,8 +449,7 @@ cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
449 * WRITEX header, not including the 4 byte RFC1001 length. 449 * WRITEX header, not including the 4 byte RFC1001 length.
450 */ 450 */
451 if (!(server->capabilities & CAP_LARGE_WRITE_X) || 451 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
452 (!(server->capabilities & CAP_UNIX) && 452 (!(server->capabilities & CAP_UNIX) && server->sign))
453 (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED))))
454 wsize = min_t(unsigned int, wsize, 453 wsize = min_t(unsigned int, wsize,
455 server->maxBuf - sizeof(WRITE_REQ) + 4); 454 server->maxBuf - sizeof(WRITE_REQ) + 4);
456 455
@@ -765,20 +764,14 @@ smb_set_file_info(struct inode *inode, const char *full_path,
765 } 764 }
766 tcon = tlink_tcon(tlink); 765 tcon = tlink_tcon(tlink);
767 766
768 /* 767 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
769 * NT4 apparently returns success on this call, but it doesn't really
770 * work.
771 */
772 if (!(tcon->ses->flags & CIFS_SES_NT4)) {
773 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf,
774 cifs_sb->local_nls,
775 cifs_sb->mnt_cifs_flags & 768 cifs_sb->mnt_cifs_flags &
776 CIFS_MOUNT_MAP_SPECIAL_CHR); 769 CIFS_MOUNT_MAP_SPECIAL_CHR);
777 if (rc == 0) { 770 if (rc == 0) {
778 cinode->cifsAttrs = le32_to_cpu(buf->Attributes); 771 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
779 goto out; 772 goto out;
780 } else if (rc != -EOPNOTSUPP && rc != -EINVAL) 773 } else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
781 goto out; 774 goto out;
782 } 775 }
783 776
784 cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n"); 777 cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
@@ -964,4 +957,6 @@ struct smb_version_values smb1_values = {
964 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND, 957 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
965 .cap_large_files = CAP_LARGE_FILES, 958 .cap_large_files = CAP_LARGE_FILES,
966 .oplock_read = OPLOCK_READ, 959 .oplock_read = OPLOCK_READ,
960 .signing_enabled = SECMODE_SIGN_ENABLED,
961 .signing_required = SECMODE_SIGN_REQUIRED,
967}; 962};
diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h
index 7c0e2143e775..c38350851b08 100644
--- a/fs/cifs/smb2glob.h
+++ b/fs/cifs/smb2glob.h
@@ -54,5 +54,7 @@
54#define SMB2_SIGNATURE_SIZE (16) 54#define SMB2_SIGNATURE_SIZE (16)
55#define SMB2_NTLMV2_SESSKEY_SIZE (16) 55#define SMB2_NTLMV2_SESSKEY_SIZE (16)
56#define SMB2_HMACSHA256_SIZE (32) 56#define SMB2_HMACSHA256_SIZE (32)
57#define SMB2_CMACAES_SIZE (16)
58#define SMB3_SIGNKEY_SIZE (16)
57 59
58#endif /* _SMB2_GLOB_H */ 60#endif /* _SMB2_GLOB_H */
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 10383d8c015b..b0c43345cd98 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -266,6 +266,10 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr)
266 ((struct smb2_query_directory_rsp *)hdr)->OutputBufferLength); 266 ((struct smb2_query_directory_rsp *)hdr)->OutputBufferLength);
267 break; 267 break;
268 case SMB2_IOCTL: 268 case SMB2_IOCTL:
269 *off = le32_to_cpu(
270 ((struct smb2_ioctl_rsp *)hdr)->OutputOffset);
271 *len = le32_to_cpu(((struct smb2_ioctl_rsp *)hdr)->OutputCount);
272 break;
269 case SMB2_CHANGE_NOTIFY: 273 case SMB2_CHANGE_NOTIFY:
270 default: 274 default:
271 /* BB FIXME for unimplemented cases above */ 275 /* BB FIXME for unimplemented cases above */
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index f2e76f3b0c61..6d15cab95b99 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -281,6 +281,25 @@ smb2_clear_stats(struct cifs_tcon *tcon)
281} 281}
282 282
283static void 283static void
284smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
285{
286 seq_puts(m, "\n\tShare Capabilities:");
287 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
288 seq_puts(m, " DFS,");
289 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
290 seq_puts(m, " CONTINUOUS AVAILABILITY,");
291 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
292 seq_puts(m, " SCALEOUT,");
293 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
294 seq_puts(m, " CLUSTER,");
295 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
296 seq_puts(m, " ASYMMETRIC,");
297 if (tcon->capabilities == 0)
298 seq_puts(m, " None");
299 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
300}
301
302static void
284smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) 303smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
285{ 304{
286#ifdef CONFIG_CIFS_STATS 305#ifdef CONFIG_CIFS_STATS
@@ -292,7 +311,6 @@ smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
292 seq_printf(m, "\nSessionSetups: %d sent %d failed", 311 seq_printf(m, "\nSessionSetups: %d sent %d failed",
293 atomic_read(&sent[SMB2_SESSION_SETUP_HE]), 312 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
294 atomic_read(&failed[SMB2_SESSION_SETUP_HE])); 313 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
295#define SMB2LOGOFF 0x0002 /* trivial request/resp */
296 seq_printf(m, "\nLogoffs: %d sent %d failed", 314 seq_printf(m, "\nLogoffs: %d sent %d failed",
297 atomic_read(&sent[SMB2_LOGOFF_HE]), 315 atomic_read(&sent[SMB2_LOGOFF_HE]),
298 atomic_read(&failed[SMB2_LOGOFF_HE])); 316 atomic_read(&failed[SMB2_LOGOFF_HE]));
@@ -645,6 +663,7 @@ struct smb_version_operations smb30_operations = {
645 .dump_detail = smb2_dump_detail, 663 .dump_detail = smb2_dump_detail,
646 .clear_stats = smb2_clear_stats, 664 .clear_stats = smb2_clear_stats,
647 .print_stats = smb2_print_stats, 665 .print_stats = smb2_print_stats,
666 .dump_share_caps = smb2_dump_share_caps,
648 .is_oplock_break = smb2_is_valid_oplock_break, 667 .is_oplock_break = smb2_is_valid_oplock_break,
649 .need_neg = smb2_need_neg, 668 .need_neg = smb2_need_neg,
650 .negotiate = smb2_negotiate, 669 .negotiate = smb2_negotiate,
@@ -690,6 +709,7 @@ struct smb_version_operations smb30_operations = {
690 .get_lease_key = smb2_get_lease_key, 709 .get_lease_key = smb2_get_lease_key,
691 .set_lease_key = smb2_set_lease_key, 710 .set_lease_key = smb2_set_lease_key,
692 .new_lease_key = smb2_new_lease_key, 711 .new_lease_key = smb2_new_lease_key,
712 .generate_signingkey = generate_smb3signingkey,
693 .calc_signature = smb3_calc_signature, 713 .calc_signature = smb3_calc_signature,
694}; 714};
695 715
@@ -709,6 +729,8 @@ struct smb_version_values smb20_values = {
709 .cap_nt_find = SMB2_NT_FIND, 729 .cap_nt_find = SMB2_NT_FIND,
710 .cap_large_files = SMB2_LARGE_FILES, 730 .cap_large_files = SMB2_LARGE_FILES,
711 .oplock_read = SMB2_OPLOCK_LEVEL_II, 731 .oplock_read = SMB2_OPLOCK_LEVEL_II,
732 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
733 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
712}; 734};
713 735
714struct smb_version_values smb21_values = { 736struct smb_version_values smb21_values = {
@@ -727,6 +749,8 @@ struct smb_version_values smb21_values = {
727 .cap_nt_find = SMB2_NT_FIND, 749 .cap_nt_find = SMB2_NT_FIND,
728 .cap_large_files = SMB2_LARGE_FILES, 750 .cap_large_files = SMB2_LARGE_FILES,
729 .oplock_read = SMB2_OPLOCK_LEVEL_II, 751 .oplock_read = SMB2_OPLOCK_LEVEL_II,
752 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
753 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
730}; 754};
731 755
732struct smb_version_values smb30_values = { 756struct smb_version_values smb30_values = {
@@ -745,4 +769,26 @@ struct smb_version_values smb30_values = {
745 .cap_nt_find = SMB2_NT_FIND, 769 .cap_nt_find = SMB2_NT_FIND,
746 .cap_large_files = SMB2_LARGE_FILES, 770 .cap_large_files = SMB2_LARGE_FILES,
747 .oplock_read = SMB2_OPLOCK_LEVEL_II, 771 .oplock_read = SMB2_OPLOCK_LEVEL_II,
772 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
773 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
774};
775
776struct smb_version_values smb302_values = {
777 .version_string = SMB302_VERSION_STRING,
778 .protocol_id = SMB302_PROT_ID,
779 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
780 .large_lock_type = 0,
781 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
782 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
783 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
784 .header_size = sizeof(struct smb2_hdr),
785 .max_header_size = MAX_SMB2_HDR_SIZE,
786 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
787 .lock_cmd = SMB2_LOCK,
788 .cap_unix = 0,
789 .cap_nt_find = SMB2_NT_FIND,
790 .cap_large_files = SMB2_LARGE_FILES,
791 .oplock_read = SMB2_OPLOCK_LEVEL_II,
792 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
793 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
748}; 794};
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 2b95ce2b54e8..2b312e4eeaa6 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1,7 +1,7 @@
1/* 1/*
2 * fs/cifs/smb2pdu.c 2 * fs/cifs/smb2pdu.c
3 * 3 *
4 * Copyright (C) International Business Machines Corp., 2009, 2012 4 * Copyright (C) International Business Machines Corp., 2009, 2013
5 * Etersoft, 2012 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com) 6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012 7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
@@ -108,19 +108,33 @@ smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ ,
108 if (!tcon) 108 if (!tcon)
109 goto out; 109 goto out;
110 110
111 /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */
112 /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
113 /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
114 if ((tcon->ses) &&
115 (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
116 hdr->CreditCharge = cpu_to_le16(1);
117 /* else CreditCharge MBZ */
118
111 hdr->TreeId = tcon->tid; 119 hdr->TreeId = tcon->tid;
112 /* Uid is not converted */ 120 /* Uid is not converted */
113 if (tcon->ses) 121 if (tcon->ses)
114 hdr->SessionId = tcon->ses->Suid; 122 hdr->SessionId = tcon->ses->Suid;
115 /* BB check following DFS flags BB */ 123
116 /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ 124 /*
117 if (tcon->share_flags & SHI1005_FLAGS_DFS) 125 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
118 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; 126 * to pass the path on the Open SMB prefixed by \\server\share.
119 /* BB how does SMB2 do case sensitive? */ 127 * Not sure when we would need to do the augmented path (if ever) and
120 /* if (tcon->nocase) 128 * setting this flag breaks the SMB2 open operation since it is
121 hdr->Flags |= SMBFLG_CASELESS; */ 129 * illegal to send an empty path name (without \\server\share prefix)
122 if (tcon->ses && tcon->ses->server && 130 * when the DFS flag is set in the SMB open header. We could
123 (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED)) 131 * consider setting the flag on all operations other than open
132 * but it is safer to net set it for now.
133 */
134/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
135 hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
136
137 if (tcon->ses && tcon->ses->server && tcon->ses->server->sign)
124 hdr->Flags |= SMB2_FLAGS_SIGNED; 138 hdr->Flags |= SMB2_FLAGS_SIGNED;
125out: 139out:
126 pdu->StructureSize2 = cpu_to_le16(parmsize); 140 pdu->StructureSize2 = cpu_to_le16(parmsize);
@@ -328,34 +342,22 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
328 struct kvec iov[1]; 342 struct kvec iov[1];
329 int rc = 0; 343 int rc = 0;
330 int resp_buftype; 344 int resp_buftype;
331 struct TCP_Server_Info *server; 345 struct TCP_Server_Info *server = ses->server;
332 unsigned int sec_flags;
333 u16 temp = 0;
334 int blob_offset, blob_length; 346 int blob_offset, blob_length;
335 char *security_blob; 347 char *security_blob;
336 int flags = CIFS_NEG_OP; 348 int flags = CIFS_NEG_OP;
337 349
338 cifs_dbg(FYI, "Negotiate protocol\n"); 350 cifs_dbg(FYI, "Negotiate protocol\n");
339 351
340 if (ses->server) 352 if (!server) {
341 server = ses->server; 353 WARN(1, "%s: server is NULL!\n", __func__);
342 else { 354 return -EIO;
343 rc = -EIO;
344 return rc;
345 } 355 }
346 356
347 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); 357 rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
348 if (rc) 358 if (rc)
349 return rc; 359 return rc;
350 360
351 /* if any of auth flags (ie not sign or seal) are overriden use them */
352 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
353 sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
354 else /* if override flags set only sign/seal OR them with global auth */
355 sec_flags = global_secflags | ses->overrideSecFlg;
356
357 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
358
359 req->hdr.SessionId = 0; 361 req->hdr.SessionId = 0;
360 362
361 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); 363 req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
@@ -364,12 +366,12 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
364 inc_rfc1001_len(req, 2); 366 inc_rfc1001_len(req, 2);
365 367
366 /* only one of SMB2 signing flags may be set in SMB2 request */ 368 /* only one of SMB2 signing flags may be set in SMB2 request */
367 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) 369 if (ses->sign)
368 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; 370 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
369 else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ 371 else if (global_secflags & CIFSSEC_MAY_SIGN)
370 temp = SMB2_NEGOTIATE_SIGNING_ENABLED; 372 req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
371 373 else
372 req->SecurityMode = cpu_to_le16(temp); 374 req->SecurityMode = 0;
373 375
374 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); 376 req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
375 377
@@ -399,6 +401,8 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
399 cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); 401 cifs_dbg(FYI, "negotiated smb2.1 dialect\n");
400 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) 402 else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
401 cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); 403 cifs_dbg(FYI, "negotiated smb3.0 dialect\n");
404 else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
405 cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
402 else { 406 else {
403 cifs_dbg(VFS, "Illegal dialect returned by server %d\n", 407 cifs_dbg(VFS, "Illegal dialect returned by server %d\n",
404 le16_to_cpu(rsp->DialectRevision)); 408 le16_to_cpu(rsp->DialectRevision));
@@ -407,6 +411,8 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
407 } 411 }
408 server->dialect = le16_to_cpu(rsp->DialectRevision); 412 server->dialect = le16_to_cpu(rsp->DialectRevision);
409 413
414 /* SMB2 only has an extended negflavor */
415 server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
410 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); 416 server->maxBuf = le32_to_cpu(rsp->MaxTransactSize);
411 server->max_read = le32_to_cpu(rsp->MaxReadSize); 417 server->max_read = le32_to_cpu(rsp->MaxReadSize);
412 server->max_write = le32_to_cpu(rsp->MaxWriteSize); 418 server->max_write = le32_to_cpu(rsp->MaxWriteSize);
@@ -418,44 +424,22 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
418 424
419 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, 425 security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
420 &rsp->hdr); 426 &rsp->hdr);
421 if (blob_length == 0) { 427 /*
422 cifs_dbg(VFS, "missing security blob on negprot\n"); 428 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
423 rc = -EIO; 429 * for us will be
424 goto neg_exit; 430 * ses->sectype = RawNTLMSSP;
425 } 431 * but for time being this is our only auth choice so doesn't matter.
426 432 * We just found a server which sets blob length to zero expecting raw.
427 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags); 433 */
428 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) { 434 if (blob_length == 0)
429 cifs_dbg(FYI, "Signing required\n"); 435 cifs_dbg(FYI, "missing security blob on negprot\n");
430 if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED |
431 SMB2_NEGOTIATE_SIGNING_ENABLED))) {
432 cifs_dbg(VFS, "signing required but server lacks support\n");
433 rc = -EOPNOTSUPP;
434 goto neg_exit;
435 }
436 server->sec_mode |= SECMODE_SIGN_REQUIRED;
437 } else if (sec_flags & CIFSSEC_MAY_SIGN) {
438 cifs_dbg(FYI, "Signing optional\n");
439 if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
440 cifs_dbg(FYI, "Server requires signing\n");
441 server->sec_mode |= SECMODE_SIGN_REQUIRED;
442 } else {
443 server->sec_mode &=
444 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
445 }
446 } else {
447 cifs_dbg(FYI, "Signing disabled\n");
448 if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
449 cifs_dbg(VFS, "Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags\n");
450 rc = -EOPNOTSUPP;
451 goto neg_exit;
452 }
453 server->sec_mode &=
454 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
455 }
456 436
437 rc = cifs_enable_signing(server, ses->sign);
457#ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ 438#ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
458 rc = decode_neg_token_init(security_blob, blob_length, 439 if (rc)
440 goto neg_exit;
441 if (blob_length)
442 rc = decode_neg_token_init(security_blob, blob_length,
459 &server->sec_type); 443 &server->sec_type);
460 if (rc == 1) 444 if (rc == 1)
461 rc = 0; 445 rc = 0;
@@ -480,9 +464,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
480 int rc = 0; 464 int rc = 0;
481 int resp_buftype; 465 int resp_buftype;
482 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ 466 __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */
483 struct TCP_Server_Info *server; 467 struct TCP_Server_Info *server = ses->server;
484 unsigned int sec_flags;
485 u8 temp = 0;
486 u16 blob_length = 0; 468 u16 blob_length = 0;
487 char *security_blob; 469 char *security_blob;
488 char *ntlmssp_blob = NULL; 470 char *ntlmssp_blob = NULL;
@@ -490,11 +472,9 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
490 472
491 cifs_dbg(FYI, "Session Setup\n"); 473 cifs_dbg(FYI, "Session Setup\n");
492 474
493 if (ses->server) 475 if (!server) {
494 server = ses->server; 476 WARN(1, "%s: server is NULL!\n", __func__);
495 else { 477 return -EIO;
496 rc = -EIO;
497 return rc;
498 } 478 }
499 479
500 /* 480 /*
@@ -505,7 +485,8 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
505 if (!ses->ntlmssp) 485 if (!ses->ntlmssp)
506 return -ENOMEM; 486 return -ENOMEM;
507 487
508 ses->server->secType = RawNTLMSSP; 488 /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */
489 ses->sectype = RawNTLMSSP;
509 490
510ssetup_ntlmssp_authenticate: 491ssetup_ntlmssp_authenticate:
511 if (phase == NtLmChallenge) 492 if (phase == NtLmChallenge)
@@ -515,28 +496,19 @@ ssetup_ntlmssp_authenticate:
515 if (rc) 496 if (rc)
516 return rc; 497 return rc;
517 498
518 /* if any of auth flags (ie not sign or seal) are overriden use them */
519 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
520 sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
521 else /* if override flags set only sign/seal OR them with global auth */
522 sec_flags = global_secflags | ses->overrideSecFlg;
523
524 cifs_dbg(FYI, "sec_flags 0x%x\n", sec_flags);
525
526 req->hdr.SessionId = 0; /* First session, not a reauthenticate */ 499 req->hdr.SessionId = 0; /* First session, not a reauthenticate */
527 req->VcNumber = 0; /* MBZ */ 500 req->VcNumber = 0; /* MBZ */
528 /* to enable echos and oplocks */ 501 /* to enable echos and oplocks */
529 req->hdr.CreditRequest = cpu_to_le16(3); 502 req->hdr.CreditRequest = cpu_to_le16(3);
530 503
531 /* only one of SMB2 signing flags may be set in SMB2 request */ 504 /* only one of SMB2 signing flags may be set in SMB2 request */
532 if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) 505 if (server->sign)
533 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; 506 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED;
534 else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) 507 else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */
535 temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; 508 req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED;
536 else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ 509 else
537 temp = SMB2_NEGOTIATE_SIGNING_ENABLED; 510 req->SecurityMode = 0;
538 511
539 req->SecurityMode = temp;
540 req->Capabilities = 0; 512 req->Capabilities = 0;
541 req->Channel = 0; /* MBZ */ 513 req->Channel = 0; /* MBZ */
542 514
@@ -679,7 +651,7 @@ SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
679 651
680 /* since no tcon, smb2_init can not do this, so do here */ 652 /* since no tcon, smb2_init can not do this, so do here */
681 req->hdr.SessionId = ses->Suid; 653 req->hdr.SessionId = ses->Suid;
682 if (server->sec_mode & SECMODE_SIGN_REQUIRED) 654 if (server->sign)
683 req->hdr.Flags |= SMB2_FLAGS_SIGNED; 655 req->hdr.Flags |= SMB2_FLAGS_SIGNED;
684 656
685 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); 657 rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0);
@@ -788,11 +760,12 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
788 } 760 }
789 761
790 tcon->share_flags = le32_to_cpu(rsp->ShareFlags); 762 tcon->share_flags = le32_to_cpu(rsp->ShareFlags);
763 tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */
791 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); 764 tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
792 tcon->tidStatus = CifsGood; 765 tcon->tidStatus = CifsGood;
793 tcon->need_reconnect = false; 766 tcon->need_reconnect = false;
794 tcon->tid = rsp->hdr.TreeId; 767 tcon->tid = rsp->hdr.TreeId;
795 strncpy(tcon->treeName, tree, MAX_TREE_SIZE); 768 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
796 769
797 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && 770 if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
798 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) 771 ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
@@ -1036,6 +1009,122 @@ creat_exit:
1036 return rc; 1009 return rc;
1037} 1010}
1038 1011
1012/*
1013 * SMB2 IOCTL is used for both IOCTLs and FSCTLs
1014 */
1015int
1016SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
1017 u64 volatile_fid, u32 opcode, bool is_fsctl, char *in_data,
1018 u32 indatalen, char **out_data, u32 *plen /* returned data len */)
1019{
1020 struct smb2_ioctl_req *req;
1021 struct smb2_ioctl_rsp *rsp;
1022 struct TCP_Server_Info *server;
1023 struct cifs_ses *ses = tcon->ses;
1024 struct kvec iov[2];
1025 int resp_buftype;
1026 int num_iovecs;
1027 int rc = 0;
1028
1029 cifs_dbg(FYI, "SMB2 IOCTL\n");
1030
1031 /* zero out returned data len, in case of error */
1032 if (plen)
1033 *plen = 0;
1034
1035 if (ses && (ses->server))
1036 server = ses->server;
1037 else
1038 return -EIO;
1039
1040 rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
1041 if (rc)
1042 return rc;
1043
1044 req->CtlCode = cpu_to_le32(opcode);
1045 req->PersistentFileId = persistent_fid;
1046 req->VolatileFileId = volatile_fid;
1047
1048 if (indatalen) {
1049 req->InputCount = cpu_to_le32(indatalen);
1050 /* do not set InputOffset if no input data */
1051 req->InputOffset =
1052 cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
1053 iov[1].iov_base = in_data;
1054 iov[1].iov_len = indatalen;
1055 num_iovecs = 2;
1056 } else
1057 num_iovecs = 1;
1058
1059 req->OutputOffset = 0;
1060 req->OutputCount = 0; /* MBZ */
1061
1062 /*
1063 * Could increase MaxOutputResponse, but that would require more
1064 * than one credit. Windows typically sets this smaller, but for some
1065 * ioctls it may be useful to allow server to send more. No point
1066 * limiting what the server can send as long as fits in one credit
1067 */
1068 req->MaxOutputResponse = cpu_to_le32(0xFF00); /* < 64K uses 1 credit */
1069
1070 if (is_fsctl)
1071 req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
1072 else
1073 req->Flags = 0;
1074
1075 iov[0].iov_base = (char *)req;
1076 /* 4 for rfc1002 length field */
1077 iov[0].iov_len = get_rfc1002_length(req) + 4;
1078
1079 if (indatalen)
1080 inc_rfc1001_len(req, indatalen);
1081
1082 rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0);
1083 rsp = (struct smb2_ioctl_rsp *)iov[0].iov_base;
1084
1085 if (rc != 0) {
1086 if (tcon)
1087 cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
1088 goto ioctl_exit;
1089 }
1090
1091 /* check if caller wants to look at return data or just return rc */
1092 if ((plen == NULL) || (out_data == NULL))
1093 goto ioctl_exit;
1094
1095 *plen = le32_to_cpu(rsp->OutputCount);
1096
1097 /* We check for obvious errors in the output buffer length and offset */
1098 if (*plen == 0)
1099 goto ioctl_exit; /* server returned no data */
1100 else if (*plen > 0xFF00) {
1101 cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
1102 *plen = 0;
1103 rc = -EIO;
1104 goto ioctl_exit;
1105 }
1106
1107 if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
1108 cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
1109 le32_to_cpu(rsp->OutputOffset));
1110 *plen = 0;
1111 rc = -EIO;
1112 goto ioctl_exit;
1113 }
1114
1115 *out_data = kmalloc(*plen, GFP_KERNEL);
1116 if (*out_data == NULL) {
1117 rc = -ENOMEM;
1118 goto ioctl_exit;
1119 }
1120
1121 memcpy(*out_data, rsp->hdr.ProtocolId + le32_to_cpu(rsp->OutputOffset),
1122 *plen);
1123ioctl_exit:
1124 free_rsp_buf(resp_buftype, rsp);
1125 return rc;
1126}
1127
1039int 1128int
1040SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 1129SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
1041 u64 persistent_fid, u64 volatile_fid) 1130 u64 persistent_fid, u64 volatile_fid)
@@ -1384,8 +1473,7 @@ smb2_readv_callback(struct mid_q_entry *mid)
1384 case MID_RESPONSE_RECEIVED: 1473 case MID_RESPONSE_RECEIVED:
1385 credits_received = le16_to_cpu(buf->CreditRequest); 1474 credits_received = le16_to_cpu(buf->CreditRequest);
1386 /* result already set, check signature */ 1475 /* result already set, check signature */
1387 if (server->sec_mode & 1476 if (server->sign) {
1388 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
1389 int rc; 1477 int rc;
1390 1478
1391 rc = smb2_verify_signature(&rqst, server); 1479 rc = smb2_verify_signature(&rqst, server);
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 4cb4ced258cb..f31043b26bd3 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -1,7 +1,7 @@
1/* 1/*
2 * fs/cifs/smb2pdu.h 2 * fs/cifs/smb2pdu.h
3 * 3 *
4 * Copyright (c) International Business Machines Corp., 2009, 2010 4 * Copyright (c) International Business Machines Corp., 2009, 2013
5 * Etersoft, 2012 5 * Etersoft, 2012
6 * Author(s): Steve French (sfrench@us.ibm.com) 6 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Pavel Shilovsky (pshilovsky@samba.org) 2012 7 * Pavel Shilovsky (pshilovsky@samba.org) 2012
@@ -170,6 +170,7 @@ struct smb2_negotiate_req {
170#define SMB20_PROT_ID 0x0202 170#define SMB20_PROT_ID 0x0202
171#define SMB21_PROT_ID 0x0210 171#define SMB21_PROT_ID 0x0210
172#define SMB30_PROT_ID 0x0300 172#define SMB30_PROT_ID 0x0300
173#define SMB302_PROT_ID 0x0302
173#define BAD_PROT_ID 0xFFFF 174#define BAD_PROT_ID 0xFFFF
174 175
175/* SecurityMode flags */ 176/* SecurityMode flags */
@@ -283,10 +284,17 @@ struct smb2_tree_connect_rsp {
283#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING 0x00000400 284#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING 0x00000400
284#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM 0x00000800 285#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM 0x00000800
285#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK 0x00001000 286#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK 0x00001000
286#define SHI1005_FLAGS_ENABLE_HASH 0x00002000 287#define SHI1005_FLAGS_ENABLE_HASH_V1 0x00002000
288#define SHI1005_FLAGS_ENABLE_HASH_V2 0x00004000
289#define SHI1005_FLAGS_ENCRYPT_DATA 0x00008000
290#define SHI1005_FLAGS_ALL 0x0000FF33
287 291
288/* Possible share capabilities */ 292/* Possible share capabilities */
289#define SMB2_SHARE_CAP_DFS cpu_to_le32(0x00000008) 293#define SMB2_SHARE_CAP_DFS cpu_to_le32(0x00000008) /* all dialects */
294#define SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY cpu_to_le32(0x00000010) /* 3.0 */
295#define SMB2_SHARE_CAP_SCALEOUT cpu_to_le32(0x00000020) /* 3.0 */
296#define SMB2_SHARE_CAP_CLUSTER cpu_to_le32(0x00000040) /* 3.0 */
297#define SMB2_SHARE_CAP_ASYMMETRIC cpu_to_le32(0x00000080) /* 3.02 */
290 298
291struct smb2_tree_disconnect_req { 299struct smb2_tree_disconnect_req {
292 struct smb2_hdr hdr; 300 struct smb2_hdr hdr;
@@ -477,6 +485,75 @@ struct create_lease {
477 struct lease_context lcontext; 485 struct lease_context lcontext;
478} __packed; 486} __packed;
479 487
488/* this goes in the ioctl buffer when doing a copychunk request */
489struct copychunk_ioctl {
490 char SourceKey[24];
491 __le32 ChunkCount; /* we are only sending 1 */
492 __le32 Reserved;
493 /* array will only be one chunk long for us */
494 __le64 SourceOffset;
495 __le64 TargetOffset;
496 __le32 Length; /* how many bytes to copy */
497 __u32 Reserved2;
498} __packed;
499
500/* Response and Request are the same format */
501struct validate_negotiate_info {
502 __le32 Capabilities;
503 __u8 Guid[SMB2_CLIENT_GUID_SIZE];
504 __le16 SecurityMode;
505 __le16 DialectCount;
506 __le16 Dialect[1];
507} __packed;
508
509#define RSS_CAPABLE 0x00000001
510#define RDMA_CAPABLE 0x00000002
511
512struct network_interface_info_ioctl_rsp {
513 __le32 Next; /* next interface. zero if this is last one */
514 __le32 IfIndex;
515 __le32 Capability; /* RSS or RDMA Capable */
516 __le32 Reserved;
517 __le64 LinkSpeed;
518 char SockAddr_Storage[128];
519} __packed;
520
521#define NO_FILE_ID 0xFFFFFFFFFFFFFFFFULL /* general ioctls to srv not to file */
522
523struct smb2_ioctl_req {
524 struct smb2_hdr hdr;
525 __le16 StructureSize; /* Must be 57 */
526 __u16 Reserved;
527 __le32 CtlCode;
528 __u64 PersistentFileId; /* opaque endianness */
529 __u64 VolatileFileId; /* opaque endianness */
530 __le32 InputOffset;
531 __le32 InputCount;
532 __le32 MaxInputResponse;
533 __le32 OutputOffset;
534 __le32 OutputCount;
535 __le32 MaxOutputResponse;
536 __le32 Flags;
537 __u32 Reserved2;
538 char Buffer[0];
539} __packed;
540
541struct smb2_ioctl_rsp {
542 struct smb2_hdr hdr;
543 __le16 StructureSize; /* Must be 57 */
544 __u16 Reserved;
545 __le32 CtlCode;
546 __u64 PersistentFileId; /* opaque endianness */
547 __u64 VolatileFileId; /* opaque endianness */
548 __le32 InputOffset;
549 __le32 InputCount;
550 __le32 OutputOffset;
551 __le32 OutputCount;
552 __le32 Flags;
553 __u32 Reserved2;
554 /* char * buffer[] */
555} __packed;
556
480/* Currently defined values for close flags */ 557/* Currently defined values for close flags */
481#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB cpu_to_le16(0x0001) 558#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB cpu_to_le16(0x0001)
482struct smb2_close_req { 559struct smb2_close_req {
@@ -517,17 +594,25 @@ struct smb2_flush_rsp {
517 __le16 Reserved; 594 __le16 Reserved;
518} __packed; 595} __packed;
519 596
597/* For read request Flags field below, following flag is defined for SMB3.02 */
598#define SMB2_READFLAG_READ_UNBUFFERED 0x01
599
600/* Channel field for read and write: exactly one of following flags can be set*/
601#define SMB2_CHANNEL_NONE 0x00000000
602#define SMB2_CHANNEL_RDMA_V1 0x00000001 /* SMB3 or later */
603#define SMB2_CHANNEL_RDMA_V1_INVALIDATE 0x00000001 /* SMB3.02 or later */
604
520struct smb2_read_req { 605struct smb2_read_req {
521 struct smb2_hdr hdr; 606 struct smb2_hdr hdr;
522 __le16 StructureSize; /* Must be 49 */ 607 __le16 StructureSize; /* Must be 49 */
523 __u8 Padding; /* offset from start of SMB2 header to place read */ 608 __u8 Padding; /* offset from start of SMB2 header to place read */
524 __u8 Reserved; 609 __u8 Flags; /* MBZ unless SMB3.02 or later */
525 __le32 Length; 610 __le32 Length;
526 __le64 Offset; 611 __le64 Offset;
527 __u64 PersistentFileId; /* opaque endianness */ 612 __u64 PersistentFileId; /* opaque endianness */
528 __u64 VolatileFileId; /* opaque endianness */ 613 __u64 VolatileFileId; /* opaque endianness */
529 __le32 MinimumCount; 614 __le32 MinimumCount;
530 __le32 Channel; /* Reserved MBZ */ 615 __le32 Channel; /* MBZ except for SMB3 or later */
531 __le32 RemainingBytes; 616 __le32 RemainingBytes;
532 __le16 ReadChannelInfoOffset; /* Reserved MBZ */ 617 __le16 ReadChannelInfoOffset; /* Reserved MBZ */
533 __le16 ReadChannelInfoLength; /* Reserved MBZ */ 618 __le16 ReadChannelInfoLength; /* Reserved MBZ */
@@ -545,8 +630,9 @@ struct smb2_read_rsp {
545 __u8 Buffer[1]; 630 __u8 Buffer[1];
546} __packed; 631} __packed;
547 632
548/* For write request Flags field below the following flag is defined: */ 633/* For write request Flags field below the following flags are defined: */
549#define SMB2_WRITEFLAG_WRITE_THROUGH 0x00000001 634#define SMB2_WRITEFLAG_WRITE_THROUGH 0x00000001 /* SMB2.1 or later */
635#define SMB2_WRITEFLAG_WRITE_UNBUFFERED 0x00000002 /* SMB3.02 or later */
550 636
551struct smb2_write_req { 637struct smb2_write_req {
552 struct smb2_hdr hdr; 638 struct smb2_hdr hdr;
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 2aa3535e38ce..d4e1eb807457 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -111,6 +111,10 @@ extern int SMB2_open(const unsigned int xid, struct cifs_tcon *tcon,
111 __u32 desired_access, __u32 create_disposition, 111 __u32 desired_access, __u32 create_disposition,
112 __u32 file_attributes, __u32 create_options, 112 __u32 file_attributes, __u32 create_options,
113 __u8 *oplock, struct smb2_file_all_info *buf); 113 __u8 *oplock, struct smb2_file_all_info *buf);
114extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
115 u64 persistent_fid, u64 volatile_fid, u32 opcode,
116 bool is_fsctl, char *in_data, u32 indatalen,
117 char **out_data, u32 *plen /* returned data len */);
114extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, 118extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
115 u64 persistent_file_id, u64 volatile_file_id); 119 u64 persistent_file_id, u64 volatile_file_id);
116extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, 120extern int SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon,
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 01f0ac800780..09b4fbaadeb6 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -116,11 +116,155 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
116 return rc; 116 return rc;
117} 117}
118 118
119void
120generate_smb3signingkey(struct TCP_Server_Info *server)
121{
122 unsigned char zero = 0x0;
123 __u8 i[4] = {0, 0, 0, 1};
124 __u8 L[4] = {0, 0, 0, 128};
125 int rc = 0;
126 unsigned char prfhash[SMB2_HMACSHA256_SIZE];
127 unsigned char *hashptr = prfhash;
128
129 memset(prfhash, 0x0, SMB2_HMACSHA256_SIZE);
130 memset(server->smb3signingkey, 0x0, SMB3_SIGNKEY_SIZE);
131
132 rc = crypto_shash_setkey(server->secmech.hmacsha256,
133 server->session_key.response, SMB2_NTLMV2_SESSKEY_SIZE);
134 if (rc) {
135 cifs_dbg(VFS, "%s: Could not set with session key\n", __func__);
136 goto smb3signkey_ret;
137 }
138
139 rc = crypto_shash_init(&server->secmech.sdeschmacsha256->shash);
140 if (rc) {
141 cifs_dbg(VFS, "%s: Could not init sign hmac\n", __func__);
142 goto smb3signkey_ret;
143 }
144
145 rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash,
146 i, 4);
147 if (rc) {
148 cifs_dbg(VFS, "%s: Could not update with n\n", __func__);
149 goto smb3signkey_ret;
150 }
151
152 rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash,
153 "SMB2AESCMAC", 12);
154 if (rc) {
155 cifs_dbg(VFS, "%s: Could not update with label\n", __func__);
156 goto smb3signkey_ret;
157 }
158
159 rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash,
160 &zero, 1);
161 if (rc) {
162 cifs_dbg(VFS, "%s: Could not update with zero\n", __func__);
163 goto smb3signkey_ret;
164 }
165
166 rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash,
167 "SmbSign", 8);
168 if (rc) {
169 cifs_dbg(VFS, "%s: Could not update with context\n", __func__);
170 goto smb3signkey_ret;
171 }
172
173 rc = crypto_shash_update(&server->secmech.sdeschmacsha256->shash,
174 L, 4);
175 if (rc) {
176 cifs_dbg(VFS, "%s: Could not update with L\n", __func__);
177 goto smb3signkey_ret;
178 }
179
180 rc = crypto_shash_final(&server->secmech.sdeschmacsha256->shash,
181 hashptr);
182 if (rc) {
183 cifs_dbg(VFS, "%s: Could not generate sha256 hash\n", __func__);
184 goto smb3signkey_ret;
185 }
186
187 memcpy(server->smb3signingkey, hashptr, SMB3_SIGNKEY_SIZE);
188
189smb3signkey_ret:
190 return;
191}
192
119int 193int
120smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) 194smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
121{ 195{
122 cifs_dbg(FYI, "smb3 signatures not supported yet\n"); 196 int i, rc;
123 return -EOPNOTSUPP; 197 unsigned char smb3_signature[SMB2_CMACAES_SIZE];
198 unsigned char *sigptr = smb3_signature;
199 struct kvec *iov = rqst->rq_iov;
200 int n_vec = rqst->rq_nvec;
201 struct smb2_hdr *smb2_pdu = (struct smb2_hdr *)iov[0].iov_base;
202
203 memset(smb3_signature, 0x0, SMB2_CMACAES_SIZE);
204 memset(smb2_pdu->Signature, 0x0, SMB2_SIGNATURE_SIZE);
205
206 rc = crypto_shash_setkey(server->secmech.cmacaes,
207 server->smb3signingkey, SMB2_CMACAES_SIZE);
208 if (rc) {
209 cifs_dbg(VFS, "%s: Could not set key for cmac aes\n", __func__);
210 return rc;
211 }
212
213 rc = crypto_shash_init(&server->secmech.sdesccmacaes->shash);
214 if (rc) {
215 cifs_dbg(VFS, "%s: Could not init cmac aes\n", __func__);
216 return rc;
217 }
218
219 for (i = 0; i < n_vec; i++) {
220 if (iov[i].iov_len == 0)
221 continue;
222 if (iov[i].iov_base == NULL) {
223 cifs_dbg(VFS, "null iovec entry");
224 return -EIO;
225 }
226 /*
227 * The first entry includes a length field (which does not get
228 * signed that occupies the first 4 bytes before the header).
229 */
230 if (i == 0) {
231 if (iov[0].iov_len <= 8) /* cmd field at offset 9 */
232 break; /* nothing to sign or corrupt header */
233 rc =
234 crypto_shash_update(
235 &server->secmech.sdesccmacaes->shash,
236 iov[i].iov_base + 4, iov[i].iov_len - 4);
237 } else {
238 rc =
239 crypto_shash_update(
240 &server->secmech.sdesccmacaes->shash,
241 iov[i].iov_base, iov[i].iov_len);
242 }
243 if (rc) {
244 cifs_dbg(VFS, "%s: Couldn't update cmac aes with payload\n",
245 __func__);
246 return rc;
247 }
248 }
249
250 /* now hash over the rq_pages array */
251 for (i = 0; i < rqst->rq_npages; i++) {
252 struct kvec p_iov;
253
254 cifs_rqst_page_to_kvec(rqst, i, &p_iov);
255 crypto_shash_update(&server->secmech.sdesccmacaes->shash,
256 p_iov.iov_base, p_iov.iov_len);
257 kunmap(rqst->rq_pages[i]);
258 }
259
260 rc = crypto_shash_final(&server->secmech.sdesccmacaes->shash,
261 sigptr);
262 if (rc)
263 cifs_dbg(VFS, "%s: Could not generate cmac aes\n", __func__);
264
265 memcpy(smb2_pdu->Signature, sigptr, SMB2_SIGNATURE_SIZE);
266
267 return rc;
124} 268}
125 269
126/* must be called with server->srv_mutex held */ 270/* must be called with server->srv_mutex held */
@@ -275,8 +419,7 @@ smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
275 419
276 dump_smb(mid->resp_buf, min_t(u32, 80, len)); 420 dump_smb(mid->resp_buf, min_t(u32, 80, len));
277 /* convert the length into a more usable form */ 421 /* convert the length into a more usable form */
278 if ((len > 24) && 422 if (len > 24 && server->sign) {
279 (server->sec_mode & (SECMODE_SIGN_REQUIRED|SECMODE_SIGN_ENABLED))) {
280 int rc; 423 int rc;
281 424
282 rc = smb2_verify_signature(&rqst, server); 425 rc = smb2_verify_signature(&rqst, server);
diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h
index 7056b891e087..d952ee48f4dc 100644
--- a/fs/cifs/smbfsctl.h
+++ b/fs/cifs/smbfsctl.h
@@ -1,7 +1,7 @@
1/* 1/*
2 * fs/cifs/smbfsctl.h: SMB, CIFS, SMB2 FSCTL definitions 2 * fs/cifs/smbfsctl.h: SMB, CIFS, SMB2 FSCTL definitions
3 * 3 *
4 * Copyright (c) International Business Machines Corp., 2002,2009 4 * Copyright (c) International Business Machines Corp., 2002,2013
5 * Author(s): Steve French (sfrench@us.ibm.com) 5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * 6 *
7 * This library is free software; you can redistribute it and/or modify 7 * This library is free software; you can redistribute it and/or modify
@@ -22,7 +22,7 @@
22/* IOCTL information */ 22/* IOCTL information */
23/* 23/*
24 * List of ioctl/fsctl function codes that are or could be useful in the 24 * List of ioctl/fsctl function codes that are or could be useful in the
25 * future to remote clients like cifs or SMB2 client. There is probably 25 * future to remote clients like cifs or SMB2/SMB3 client. This is probably
26 * a slightly larger set of fsctls that NTFS local filesystem could handle, 26 * a slightly larger set of fsctls that NTFS local filesystem could handle,
27 * including the seven below that we do not have struct definitions for. 27 * including the seven below that we do not have struct definitions for.
28 * Even with protocol definitions for most of these now available, we still 28 * Even with protocol definitions for most of these now available, we still
@@ -30,7 +30,13 @@
30 * remotely. Some of the following, such as the encryption/compression ones 30 * remotely. Some of the following, such as the encryption/compression ones
31 * could be invoked from tools via a specialized hook into the VFS rather 31 * could be invoked from tools via a specialized hook into the VFS rather
32 * than via the standard vfs entry points 32 * than via the standard vfs entry points
33 *
34 * See MS-SMB2 Section 2.2.31 (last checked June 2013, all of that list are
35 * below). Additional detail on less common ones can be found in MS-FSCC
36 * section 2.3.
33 */ 37 */
38#define FSCTL_DFS_GET_REFERRALS 0x00060194
39#define FSCTL_DFS_GET_REFERRALS_EX 0x000601B0
34#define FSCTL_REQUEST_OPLOCK_LEVEL_1 0x00090000 40#define FSCTL_REQUEST_OPLOCK_LEVEL_1 0x00090000
35#define FSCTL_REQUEST_OPLOCK_LEVEL_2 0x00090004 41#define FSCTL_REQUEST_OPLOCK_LEVEL_2 0x00090004
36#define FSCTL_REQUEST_BATCH_OPLOCK 0x00090008 42#define FSCTL_REQUEST_BATCH_OPLOCK 0x00090008
@@ -71,14 +77,31 @@
71#define FSCTL_SET_SHORT_NAME_BEHAVIOR 0x000901B4 /* BB add struct */ 77#define FSCTL_SET_SHORT_NAME_BEHAVIOR 0x000901B4 /* BB add struct */
72#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */ 78#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */
73#define FSCTL_SET_DEFECT_MANAGEMENT 0x00098134 /* BB add struct */ 79#define FSCTL_SET_DEFECT_MANAGEMENT 0x00098134 /* BB add struct */
80#define FSCTL_FILE_LEVEL_TRIM 0x00098208 /* BB add struct */
74#define FSCTL_SIS_LINK_FILES 0x0009C104 81#define FSCTL_SIS_LINK_FILES 0x0009C104
75#define FSCTL_PIPE_PEEK 0x0011400C /* BB add struct */ 82#define FSCTL_PIPE_PEEK 0x0011400C /* BB add struct */
76#define FSCTL_PIPE_TRANSCEIVE 0x0011C017 /* BB add struct */ 83#define FSCTL_PIPE_TRANSCEIVE 0x0011C017 /* BB add struct */
77/* strange that the number for this op is not sequential with previous op */ 84/* strange that the number for this op is not sequential with previous op */
78#define FSCTL_PIPE_WAIT 0x00110018 /* BB add struct */ 85#define FSCTL_PIPE_WAIT 0x00110018 /* BB add struct */
86/* Enumerate previous versions of a file */
87#define FSCTL_SRV_ENUMERATE_SNAPSHOTS 0x00144064
88/* Retrieve an opaque file reference for server-side data movement ie copy */
89#define FSCTL_SRV_REQUEST_RESUME_KEY 0x00140078
90#define FSCTL_LMR_REQUEST_RESILIENCY 0x001401D4 /* BB add struct */
79#define FSCTL_LMR_GET_LINK_TRACK_INF 0x001400E8 /* BB add struct */ 91#define FSCTL_LMR_GET_LINK_TRACK_INF 0x001400E8 /* BB add struct */
80#define FSCTL_LMR_SET_LINK_TRACK_INF 0x001400EC /* BB add struct */ 92#define FSCTL_LMR_SET_LINK_TRACK_INF 0x001400EC /* BB add struct */
93#define FSCTL_VALIDATE_NEGOTIATE_INFO 0x00140204 /* BB add struct */
94/* Perform server-side data movement */
95#define FSCTL_SRV_COPYCHUNK 0x001440F2
96#define FSCTL_SRV_COPYCHUNK_WRITE 0x001480F2
97#define FSCTL_QUERY_NETWORK_INTERFACE_INFO 0x001401FC /* BB add struct */
98#define FSCTL_SRV_READ_HASH 0x001441BB /* BB add struct */
81 99
82#define IO_REPARSE_TAG_MOUNT_POINT 0xA0000003 100#define IO_REPARSE_TAG_MOUNT_POINT 0xA0000003
83#define IO_REPARSE_TAG_HSM 0xC0000004 101#define IO_REPARSE_TAG_HSM 0xC0000004
84#define IO_REPARSE_TAG_SIS 0x80000007 102#define IO_REPARSE_TAG_SIS 0x80000007
103
104/* fsctl flags */
105/* If Flags is set to this value, the request is an FSCTL not ioctl request */
106#define SMB2_0_IOCTL_IS_FSCTL 0x00000001
107
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index bfbf4700d160..1996d6ceb833 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -463,7 +463,7 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
463 struct mid_q_entry *mid; 463 struct mid_q_entry *mid;
464 464
465 /* enable signing if server requires it */ 465 /* enable signing if server requires it */
466 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) 466 if (server->sign)
467 hdr->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; 467 hdr->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
468 468
469 mid = AllocMidQEntry(hdr, server); 469 mid = AllocMidQEntry(hdr, server);
@@ -612,7 +612,7 @@ cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
612 dump_smb(mid->resp_buf, min_t(u32, 92, len)); 612 dump_smb(mid->resp_buf, min_t(u32, 92, len));
613 613
614 /* convert the length into a more usable form */ 614 /* convert the length into a more usable form */
615 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { 615 if (server->sign) {
616 struct kvec iov; 616 struct kvec iov;
617 int rc = 0; 617 int rc = 0;
618 struct smb_rqst rqst = { .rq_iov = &iov, 618 struct smb_rqst rqst = { .rq_iov = &iov,
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 18:42:20 -0500