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authorSteve French <sfrench@us.ibm.com>2009-04-30 12:13:32 -0400
committerSteve French <sfrench@us.ibm.com>2009-04-30 12:13:32 -0400
commit20418acd6874792359b42c12d159f42f17593f34 (patch)
tree67ebbc84ccfaab785e3118dd39292a358b5e1e44 /fs/cifs
parentf58841666bc22e827ca0dcef7b71c7bc2758ce82 (diff)
[CIFS] Remove older session setup implementation
Two years ago, when the session setup code in cifs was rewritten and moved to fs/cifs/sess.c, we were asked to keep the old code for a release or so (which could be reenabled at runtime) since it was such a large change and because the asn (SPNEGO) and NTLMSSP code was not rewritten and needed to be. This was useful to avoid regressions, but is long overdue to be removed. Now that the Kerberos (asn/spnego) code is working in fs/cifs/sess.c, and the NTLMSSP code moved (NTLMSSP blob setup be rewritten with the next patch in this series) quite a bit of dead code from fs/cifs/connect.c now can be removed. This old code should have been removed last year, but the earlier krb5 patches did not move/remove the NTLMSSP code which we had asked to be done first. Since no one else volunteered, I am doing it now. It is extremely important that we continue to examine the documentation for this area, to make sure our code continues to be uptodate with changes since Windows 2003. Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/connect.c381
1 files changed, 7 insertions, 374 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e94d6b29af64..579a628d1e65 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2593,310 +2593,6 @@ out:
2593} 2593}
2594 2594
2595static int 2595static int
2596CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2597 char session_key[CIFS_SESS_KEY_SIZE],
2598 const struct nls_table *nls_codepage)
2599{
2600 struct smb_hdr *smb_buffer;
2601 struct smb_hdr *smb_buffer_response;
2602 SESSION_SETUP_ANDX *pSMB;
2603 SESSION_SETUP_ANDX *pSMBr;
2604 char *bcc_ptr;
2605 char *user;
2606 char *domain;
2607 int rc = 0;
2608 int remaining_words = 0;
2609 int bytes_returned = 0;
2610 int len;
2611 __u32 capabilities;
2612 __u16 count;
2613
2614 cFYI(1, ("In sesssetup"));
2615 if (ses == NULL)
2616 return -EINVAL;
2617 user = ses->userName;
2618 domain = ses->domainName;
2619 smb_buffer = cifs_buf_get();
2620
2621 if (smb_buffer == NULL)
2622 return -ENOMEM;
2623
2624 smb_buffer_response = smb_buffer;
2625 pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2626
2627 /* send SMBsessionSetup here */
2628 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2629 NULL /* no tCon exists yet */ , 13 /* wct */ );
2630
2631 smb_buffer->Mid = GetNextMid(ses->server);
2632 pSMB->req_no_secext.AndXCommand = 0xFF;
2633 pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2634 pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2635
2636 if (ses->server->secMode &
2637 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2638 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2639
2640 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2641 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2642 if (ses->capabilities & CAP_UNICODE) {
2643 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2644 capabilities |= CAP_UNICODE;
2645 }
2646 if (ses->capabilities & CAP_STATUS32) {
2647 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2648 capabilities |= CAP_STATUS32;
2649 }
2650 if (ses->capabilities & CAP_DFS) {
2651 smb_buffer->Flags2 |= SMBFLG2_DFS;
2652 capabilities |= CAP_DFS;
2653 }
2654 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2655
2656 pSMB->req_no_secext.CaseInsensitivePasswordLength =
2657 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2658
2659 pSMB->req_no_secext.CaseSensitivePasswordLength =
2660 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2661 bcc_ptr = pByteArea(smb_buffer);
2662 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2663 bcc_ptr += CIFS_SESS_KEY_SIZE;
2664 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2665 bcc_ptr += CIFS_SESS_KEY_SIZE;
2666
2667 if (ses->capabilities & CAP_UNICODE) {
2668 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2669 *bcc_ptr = 0;
2670 bcc_ptr++;
2671 }
2672 if (user == NULL)
2673 bytes_returned = 0; /* skip null user */
2674 else
2675 bytes_returned =
2676 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2677 nls_codepage);
2678 /* convert number of 16 bit words to bytes */
2679 bcc_ptr += 2 * bytes_returned;
2680 bcc_ptr += 2; /* trailing null */
2681 if (domain == NULL)
2682 bytes_returned =
2683 cifs_strtoUCS((__le16 *) bcc_ptr,
2684 "CIFS_LINUX_DOM", 32, nls_codepage);
2685 else
2686 bytes_returned =
2687 cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2688 nls_codepage);
2689 bcc_ptr += 2 * bytes_returned;
2690 bcc_ptr += 2;
2691 bytes_returned =
2692 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2693 32, nls_codepage);
2694 bcc_ptr += 2 * bytes_returned;
2695 bytes_returned =
2696 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2697 32, nls_codepage);
2698 bcc_ptr += 2 * bytes_returned;
2699 bcc_ptr += 2;
2700 bytes_returned =
2701 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2702 64, nls_codepage);
2703 bcc_ptr += 2 * bytes_returned;
2704 bcc_ptr += 2;
2705 } else {
2706 if (user != NULL) {
2707 strncpy(bcc_ptr, user, 200);
2708 bcc_ptr += strnlen(user, 200);
2709 }
2710 *bcc_ptr = 0;
2711 bcc_ptr++;
2712 if (domain == NULL) {
2713 strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2714 bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2715 } else {
2716 strncpy(bcc_ptr, domain, 64);
2717 bcc_ptr += strnlen(domain, 64);
2718 *bcc_ptr = 0;
2719 bcc_ptr++;
2720 }
2721 strcpy(bcc_ptr, "Linux version ");
2722 bcc_ptr += strlen("Linux version ");
2723 strcpy(bcc_ptr, utsname()->release);
2724 bcc_ptr += strlen(utsname()->release) + 1;
2725 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2726 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2727 }
2728 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2729 smb_buffer->smb_buf_length += count;
2730 pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2731
2732 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2733 &bytes_returned, CIFS_LONG_OP);
2734 if (rc) {
2735/* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2736 } else if ((smb_buffer_response->WordCount == 3)
2737 || (smb_buffer_response->WordCount == 4)) {
2738 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2739 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2740 if (action & GUEST_LOGIN)
2741 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2742 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2743 (little endian) */
2744 cFYI(1, ("UID = %d ", ses->Suid));
2745 /* response can have either 3 or 4 word count - Samba sends 3 */
2746 bcc_ptr = pByteArea(smb_buffer_response);
2747 if ((pSMBr->resp.hdr.WordCount == 3)
2748 || ((pSMBr->resp.hdr.WordCount == 4)
2749 && (blob_len < pSMBr->resp.ByteCount))) {
2750 if (pSMBr->resp.hdr.WordCount == 4)
2751 bcc_ptr += blob_len;
2752
2753 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2754 if ((long) (bcc_ptr) % 2) {
2755 remaining_words =
2756 (BCC(smb_buffer_response) - 1) / 2;
2757 /* Unicode strings must be word
2758 aligned */
2759 bcc_ptr++;
2760 } else {
2761 remaining_words =
2762 BCC(smb_buffer_response) / 2;
2763 }
2764 len =
2765 UniStrnlen((wchar_t *) bcc_ptr,
2766 remaining_words - 1);
2767/* We look for obvious messed up bcc or strings in response so we do not go off
2768 the end since (at least) WIN2K and Windows XP have a major bug in not null
2769 terminating last Unicode string in response */
2770 kfree(ses->serverOS);
2771 ses->serverOS = kzalloc(2 * (len + 1),
2772 GFP_KERNEL);
2773 if (ses->serverOS == NULL)
2774 goto sesssetup_nomem;
2775 cifs_strfromUCS_le(ses->serverOS,
2776 (__le16 *)bcc_ptr,
2777 len, nls_codepage);
2778 bcc_ptr += 2 * (len + 1);
2779 remaining_words -= len + 1;
2780 ses->serverOS[2 * len] = 0;
2781 ses->serverOS[1 + (2 * len)] = 0;
2782 if (remaining_words > 0) {
2783 len = UniStrnlen((wchar_t *)bcc_ptr,
2784 remaining_words-1);
2785 kfree(ses->serverNOS);
2786 ses->serverNOS = kzalloc(2 * (len + 1),
2787 GFP_KERNEL);
2788 if (ses->serverNOS == NULL)
2789 goto sesssetup_nomem;
2790 cifs_strfromUCS_le(ses->serverNOS,
2791 (__le16 *)bcc_ptr,
2792 len, nls_codepage);
2793 bcc_ptr += 2 * (len + 1);
2794 ses->serverNOS[2 * len] = 0;
2795 ses->serverNOS[1 + (2 * len)] = 0;
2796 if (strncmp(ses->serverNOS,
2797 "NT LAN Manager 4", 16) == 0) {
2798 cFYI(1, ("NT4 server"));
2799 ses->flags |= CIFS_SES_NT4;
2800 }
2801 remaining_words -= len + 1;
2802 if (remaining_words > 0) {
2803 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2804 /* last string is not always null terminated
2805 (for e.g. for Windows XP & 2000) */
2806 kfree(ses->serverDomain);
2807 ses->serverDomain =
2808 kzalloc(2*(len+1),
2809 GFP_KERNEL);
2810 if (ses->serverDomain == NULL)
2811 goto sesssetup_nomem;
2812 cifs_strfromUCS_le(ses->serverDomain,
2813 (__le16 *)bcc_ptr,
2814 len, nls_codepage);
2815 bcc_ptr += 2 * (len + 1);
2816 ses->serverDomain[2*len] = 0;
2817 ses->serverDomain[1+(2*len)] = 0;
2818 } else { /* else no more room so create
2819 dummy domain string */
2820 kfree(ses->serverDomain);
2821 ses->serverDomain =
2822 kzalloc(2, GFP_KERNEL);
2823 }
2824 } else { /* no room so create dummy domain
2825 and NOS string */
2826
2827 /* if these kcallocs fail not much we
2828 can do, but better to not fail the
2829 sesssetup itself */
2830 kfree(ses->serverDomain);
2831 ses->serverDomain =
2832 kzalloc(2, GFP_KERNEL);
2833 kfree(ses->serverNOS);
2834 ses->serverNOS =
2835 kzalloc(2, GFP_KERNEL);
2836 }
2837 } else { /* ASCII */
2838 len = strnlen(bcc_ptr, 1024);
2839 if (((long) bcc_ptr + len) - (long)
2840 pByteArea(smb_buffer_response)
2841 <= BCC(smb_buffer_response)) {
2842 kfree(ses->serverOS);
2843 ses->serverOS = kzalloc(len + 1,
2844 GFP_KERNEL);
2845 if (ses->serverOS == NULL)
2846 goto sesssetup_nomem;
2847 strncpy(ses->serverOS, bcc_ptr, len);
2848
2849 bcc_ptr += len;
2850 /* null terminate the string */
2851 bcc_ptr[0] = 0;
2852 bcc_ptr++;
2853
2854 len = strnlen(bcc_ptr, 1024);
2855 kfree(ses->serverNOS);
2856 ses->serverNOS = kzalloc(len + 1,
2857 GFP_KERNEL);
2858 if (ses->serverNOS == NULL)
2859 goto sesssetup_nomem;
2860 strncpy(ses->serverNOS, bcc_ptr, len);
2861 bcc_ptr += len;
2862 bcc_ptr[0] = 0;
2863 bcc_ptr++;
2864
2865 len = strnlen(bcc_ptr, 1024);
2866 kfree(ses->serverDomain);
2867 ses->serverDomain = kzalloc(len + 1,
2868 GFP_KERNEL);
2869 if (ses->serverDomain == NULL)
2870 goto sesssetup_nomem;
2871 strncpy(ses->serverDomain, bcc_ptr,
2872 len);
2873 bcc_ptr += len;
2874 bcc_ptr[0] = 0;
2875 bcc_ptr++;
2876 } else
2877 cFYI(1,
2878 ("Variable field of length %d "
2879 "extends beyond end of smb ",
2880 len));
2881 }
2882 } else {
2883 cERROR(1, ("Security Blob Length extends beyond "
2884 "end of SMB"));
2885 }
2886 } else {
2887 cERROR(1, ("Invalid Word count %d: ",
2888 smb_buffer_response->WordCount));
2889 rc = -EIO;
2890 }
2891sesssetup_nomem: /* do not return an error on nomem for the info strings,
2892 since that could make reconnection harder, and
2893 reconnection might be needed to free memory */
2894 cifs_buf_release(smb_buffer);
2895
2896 return rc;
2897}
2898
2899static int
2900CIFSNTLMSSPNegotiateSessSetup(unsigned int xid, 2596CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2901 struct cifsSesInfo *ses, bool *pNTLMv2_flag, 2597 struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2902 const struct nls_table *nls_codepage) 2598 const struct nls_table *nls_codepage)
@@ -3229,6 +2925,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
3229 2925
3230 return rc; 2926 return rc;
3231} 2927}
2928
3232static int 2929static int
3233CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses, 2930CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3234 char *ntlm_session_key, bool ntlmv2_flag, 2931 char *ntlm_session_key, bool ntlmv2_flag,
@@ -3831,83 +3528,19 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3831 pSesInfo->capabilities = server->capabilities; 3528 pSesInfo->capabilities = server->capabilities;
3832 if (linuxExtEnabled == 0) 3529 if (linuxExtEnabled == 0)
3833 pSesInfo->capabilities &= (~CAP_UNIX); 3530 pSesInfo->capabilities &= (~CAP_UNIX);
3834 /* pSesInfo->sequence_number = 0;*/ 3531
3835 cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", 3532 cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3836 server->secMode, server->capabilities, server->timeAdj)); 3533 server->secMode, server->capabilities, server->timeAdj));
3837 3534
3838 if (experimEnabled < 2) 3535 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3839 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3840 else if (extended_security
3841 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3842 && (server->secType == NTLMSSP)) {
3843 rc = -EOPNOTSUPP;
3844 } else if (extended_security
3845 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3846 && (server->secType == RawNTLMSSP)) {
3847 cFYI(1, ("NTLMSSP sesssetup"));
3848 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3849 nls_info);
3850 if (!rc) {
3851 if (ntlmv2_flag) {
3852 char *v2_response;
3853 cFYI(1, ("more secure NTLM ver2 hash"));
3854 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3855 nls_info)) {
3856 rc = -ENOMEM;
3857 goto ss_err_exit;
3858 } else
3859 v2_response = kmalloc(16 + 64 /* blob*/,
3860 GFP_KERNEL);
3861 if (v2_response) {
3862 CalcNTLMv2_response(pSesInfo,
3863 v2_response);
3864 /* if (first_time)
3865 cifs_calculate_ntlmv2_mac_key */
3866 kfree(v2_response);
3867 /* BB Put dummy sig in SessSetup PDU? */
3868 } else {
3869 rc = -ENOMEM;
3870 goto ss_err_exit;
3871 }
3872
3873 } else {
3874 SMBNTencrypt(pSesInfo->password,
3875 server->cryptKey,
3876 ntlm_session_key);
3877
3878 if (first_time)
3879 cifs_calculate_mac_key(
3880 &server->mac_signing_key,
3881 ntlm_session_key,
3882 pSesInfo->password);
3883 }
3884 /* for better security the weaker lanman hash not sent
3885 in AuthSessSetup so we no longer calculate it */
3886
3887 rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3888 ntlm_session_key,
3889 ntlmv2_flag,
3890 nls_info);
3891 }
3892 } else { /* old style NTLM 0.12 session setup */
3893 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3894 ntlm_session_key);
3895
3896 if (first_time)
3897 cifs_calculate_mac_key(&server->mac_signing_key,
3898 ntlm_session_key,
3899 pSesInfo->password);
3900
3901 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3902 }
3903 if (rc) { 3536 if (rc) {
3904 cERROR(1, ("Send error in SessSetup = %d", rc)); 3537 cERROR(1, ("Send error in SessSetup = %d", rc));
3905 } else { 3538 } else {
3906 cFYI(1, ("CIFS Session Established successfully")); 3539 cFYI(1, ("CIFS Session Established successfully"));
3907 spin_lock(&GlobalMid_Lock); 3540 spin_lock(&GlobalMid_Lock);
3908 pSesInfo->status = CifsGood; 3541 pSesInfo->status = CifsGood;
3909 pSesInfo->need_reconnect = false; 3542 pSesInfo->need_reconnect = false;
3910 spin_unlock(&GlobalMid_Lock); 3543 spin_unlock(&GlobalMid_Lock);
3911 } 3544 }
3912 3545
3913ss_err_exit: 3546ss_err_exit:
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 17:18:46 -0500