12513 SMB 3.1.1 support for server

*** 9,18 ****
--- 9,19 ----
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
   * Copyright 2017 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright 2020 RackTop Systems, Inc.
   */
  
  /*
   * Dispatch function for SMB2_SESSION_SETUP
   *
*** 28,37 ****
--- 29,39 ----
  
  smb_sdrc_t
  smb2_session_setup(smb_request_t *sr)
  {
          smb_arg_sessionsetup_t  *sinfo;
+         smb_session_t *s = sr->session;
          uint16_t StructureSize;
          uint8_t  Flags;
          uint8_t  SecurityMode;
          uint32_t Capabilities;  /* ignored - see above */
          uint32_t Channel;
*** 78,87 ****
--- 80,95 ----
          rc = smb_mbc_decodef(&sr->smb_data, "#c",
              sinfo->ssi_iseclen, sinfo->ssi_isecblob);
          if (rc)
                  return (SDRC_ERROR);
  
+         if (s->dialect >= SMB_VERS_3_11) {
+                 ASSERT3U(s->smb31_preauth_hashid, !=, 0);
+                 (void) smb31_preauth_sha512_calc(sr, &sr->command,
+                     s->smb31_preauth_hashval);
+         }
+ 
          /*
           * Decoded everything.  Dtrace probe,
           * then no more early returns.
           */
          DTRACE_SMB2_START(op__SessionSetup, smb_request_t *, sr);