text: /*
   * Copyright 2017 Dmitry Timoshkov
   * Copyright 2017 George Popoff
   * Copyright 2008 Robert Shearman for CodeWeavers
   * Copyright 2017 Hans Leidekker for CodeWeavers
   *
   * Kerberos5 Authentication Package
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #include "config.h"
  #include "wine/port.h"
  
  #include <stdarg.h>
  #ifdef HAVE_KRB5_KRB5_H
  #include <krb5/krb5.h>
  #endif
  #ifdef SONAME_LIBGSSAPI_KRB5
  # include <gssapi/gssapi.h>
  # include <gssapi/gssapi_ext.h>
  #endif
  
  #include "ntstatus.h"
  #define WIN32_NO_STATUS
  #include "windef.h"
  #include "winbase.h"
  #include "winnls.h"
  #include "rpc.h"
  #include "sspi.h"
  #include "ntsecapi.h"
  #include "ntsecpkg.h"
  #include "winternl.h"
  #include "wine/heap.h"
  #include "wine/debug.h"
  #include "wine/unicode.h"
  
  WINE_DEFAULT_DEBUG_CHANNEL(kerberos);
  
  #define KERBEROS_MAX_BUF 12000
  
  #define KERBEROS_CAPS \
      ( SECPKG_FLAG_INTEGRITY \
      | SECPKG_FLAG_PRIVACY \
      | SECPKG_FLAG_TOKEN_ONLY \
      | SECPKG_FLAG_DATAGRAM \
      | SECPKG_FLAG_CONNECTION \
      | SECPKG_FLAG_MULTI_REQUIRED \
      | SECPKG_FLAG_EXTENDED_ERROR \
      | SECPKG_FLAG_IMPERSONATION \
      | SECPKG_FLAG_ACCEPT_WIN32_NAME \
      | SECPKG_FLAG_NEGOTIABLE \
      | SECPKG_FLAG_GSS_COMPATIBLE \
      | SECPKG_FLAG_LOGON \
      | SECPKG_FLAG_MUTUAL_AUTH \
      | SECPKG_FLAG_DELEGATION \
      | SECPKG_FLAG_READONLY_WITH_CHECKSUM \
      | SECPKG_FLAG_RESTRICTED_TOKENS \
      | SECPKG_FLAG_APPCONTAINER_CHECKS)
  
  static WCHAR kerberos_name_W[] = {'K','e','r','b','e','r','o','s',0};
  static WCHAR kerberos_comment_W[] = {'M','i','c','r','o','s','o','f','t',' ','K','e','r','b','e','r','o','s',' ','V','1','.','0',0};
  static const SecPkgInfoW infoW =
  {
      KERBEROS_CAPS,
      1,
      RPC_C_AUTHN_GSS_KERBEROS,
      KERBEROS_MAX_BUF,
      kerberos_name_W,
      kerberos_comment_W
  };
  
  static ULONG kerberos_package_id;
  static LSA_DISPATCH_TABLE lsa_dispatch;
  
  #ifdef SONAME_LIBKRB5
  
  static void *libkrb5_handle;
  
  #define MAKE_FUNCPTR(f) static typeof(f) * p_##f
  MAKE_FUNCPTR(krb5_cc_close);
  MAKE_FUNCPTR(krb5_cc_default);
  MAKE_FUNCPTR(krb5_cc_end_seq_get);
  MAKE_FUNCPTR(krb5_cc_initialize);
  MAKE_FUNCPTR(krb5_cc_next_cred);
  MAKE_FUNCPTR(krb5_cc_start_seq_get);
  MAKE_FUNCPTR(krb5_cc_store_cred);
  MAKE_FUNCPTR(krb5_cccol_cursor_free);
  MAKE_FUNCPTR(krb5_cccol_cursor_new);
  MAKE_FUNCPTR(krb5_cccol_cursor_next);
  MAKE_FUNCPTR(krb5_decode_ticket);
  MAKE_FUNCPTR(krb5_free_context);
  MAKE_FUNCPTR(krb5_free_cred_contents);
  MAKE_FUNCPTR(krb5_free_principal);
  MAKE_FUNCPTR(krb5_free_ticket);
  MAKE_FUNCPTR(krb5_free_unparsed_name);
  MAKE_FUNCPTR(krb5_get_init_creds_opt_alloc);
  MAKE_FUNCPTR(krb5_get_init_creds_opt_free);
  MAKE_FUNCPTR(krb5_get_init_creds_opt_set_out_ccache);
  MAKE_FUNCPTR(krb5_get_init_creds_password);
  MAKE_FUNCPTR(krb5_init_context);
  MAKE_FUNCPTR(krb5_is_config_principal);
  MAKE_FUNCPTR(krb5_parse_name_flags);
  MAKE_FUNCPTR(krb5_unparse_name_flags);
  #undef MAKE_FUNCPTR
  
  static void load_krb5(void)
  {
      if (!(libkrb5_handle = dlopen(SONAME_LIBKRB5, RTLD_NOW)))
      {
          WARN("Failed to load %s, Kerberos support will be disabled\n", SONAME_LIBKRB5);
          return;
      }
  
  #define LOAD_FUNCPTR(f) \
      if (!(p_##f = dlsym(libkrb5_handle, #f))) \
      { \
          ERR("Failed to load %s\n", #f); \
          goto fail; \
      }
  
      LOAD_FUNCPTR(krb5_cc_close)
      LOAD_FUNCPTR(krb5_cc_default)
      LOAD_FUNCPTR(krb5_cc_end_seq_get)
      LOAD_FUNCPTR(krb5_cc_initialize)
      LOAD_FUNCPTR(krb5_cc_next_cred)
      LOAD_FUNCPTR(krb5_cc_start_seq_get)
      LOAD_FUNCPTR(krb5_cc_store_cred)
      LOAD_FUNCPTR(krb5_cccol_cursor_free)
      LOAD_FUNCPTR(krb5_cccol_cursor_new)
      LOAD_FUNCPTR(krb5_cccol_cursor_next)
      LOAD_FUNCPTR(krb5_decode_ticket)
      LOAD_FUNCPTR(krb5_free_context)
      LOAD_FUNCPTR(krb5_free_cred_contents)
      LOAD_FUNCPTR(krb5_free_principal)
      LOAD_FUNCPTR(krb5_free_ticket)
      LOAD_FUNCPTR(krb5_free_unparsed_name)
      LOAD_FUNCPTR(krb5_get_init_creds_opt_alloc)
      LOAD_FUNCPTR(krb5_get_init_creds_opt_free)
      LOAD_FUNCPTR(krb5_get_init_creds_opt_set_out_ccache)
      LOAD_FUNCPTR(krb5_get_init_creds_password)
      LOAD_FUNCPTR(krb5_init_context)
      LOAD_FUNCPTR(krb5_is_config_principal)
      LOAD_FUNCPTR(krb5_parse_name_flags)
      LOAD_FUNCPTR(krb5_unparse_name_flags)
  #undef LOAD_FUNCPTR
  
      return;
  
  fail:
      dlclose(libkrb5_handle);
      libkrb5_handle = NULL;
  }
  
  #else /* SONAME_LIBKRB5 */
  
  static void load_krb5(void)
  {
      WARN("Kerberos support was not provided at compile time\n");
  }
  
  #endif /* SONAME_LIBKRB5 */
  
  static const char *debugstr_us( const UNICODE_STRING *us )
  {
      if (!us) return "<null>";
      return debugstr_wn( us->Buffer, us->Length / sizeof(WCHAR) );
  }
  
  static NTSTATUS NTAPI kerberos_LsaApInitializePackage(ULONG package_id, PLSA_DISPATCH_TABLE dispatch,
      PLSA_STRING database, PLSA_STRING confidentiality, PLSA_STRING *package_name)
  {
      char *kerberos_name;
  
      load_krb5();
  
      kerberos_package_id = package_id;
      lsa_dispatch = *dispatch;
  
      kerberos_name = lsa_dispatch.AllocateLsaHeap(sizeof(MICROSOFT_KERBEROS_NAME_A));
      if (!kerberos_name) return STATUS_NO_MEMORY;
  
      memcpy(kerberos_name, MICROSOFT_KERBEROS_NAME_A, sizeof(MICROSOFT_KERBEROS_NAME_A));
  
      *package_name = lsa_dispatch.AllocateLsaHeap(sizeof(**package_name));
      if (!*package_name)
      {
          lsa_dispatch.FreeLsaHeap(kerberos_name);
          return STATUS_NO_MEMORY;
      }
  
      RtlInitString(*package_name, kerberos_name);
  
      return STATUS_SUCCESS;
  }
  
  #ifdef SONAME_LIBKRB5
  
  struct ticket_info
  {
      ULONG count, allocated;
      KERB_TICKET_CACHE_INFO *info;
  };
  
  static NTSTATUS krb5_error_to_status(krb5_error_code error)
  {
      switch (error)
      {
      case 0: return STATUS_SUCCESS;
      default:
          /* FIXME */
          return STATUS_UNSUCCESSFUL;
      }
  }
  
  static void free_ticket_info(struct ticket_info *info)
  {
      ULONG i;
  
      for (i = 0; i < info->count; i++)
      {
          heap_free(info->info[i].RealmName.Buffer);
          heap_free(info->info[i].ServerName.Buffer);
      }
  
      heap_free(info->info);
  }
  
  static WCHAR *utf8_to_wstr(const char *utf8)
  {
      int len;
      WCHAR *wstr;
  
      len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
      wstr = heap_alloc(len * sizeof(WCHAR));
      if (wstr)
          MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);
  
      return wstr;
  }
  
  static NTSTATUS copy_tickets_from_cache(krb5_context context, krb5_ccache cache, struct ticket_info *info)
  {
      NTSTATUS status;
      krb5_cc_cursor cursor;
      krb5_error_code error;
      krb5_creds credentials;
      krb5_ticket *ticket;
      char *name_with_realm, *name_without_realm, *realm_name;
      WCHAR *realm_nameW, *name_without_realmW;
  
      error = p_krb5_cc_start_seq_get(context, cache, &cursor);
      if (error) return krb5_error_to_status(error);
  
      for (;;)
      {
          error = p_krb5_cc_next_cred(context, cache, &cursor, &credentials);
          if (error)
          {
              if (error == KRB5_CC_END)
                  status = STATUS_SUCCESS;
              else
                  status = krb5_error_to_status(error);
              break;
          }
  
          if (p_krb5_is_config_principal(context, credentials.server))
          {
              p_krb5_free_cred_contents(context, &credentials);
              continue;
          }
  
          if (info->count == info->allocated)
          {
              KERB_TICKET_CACHE_INFO *new_info;
              ULONG new_allocated;
  
              if (info->allocated)
              {
                  new_allocated = info->allocated * 2;
                  new_info = heap_realloc(info->info, sizeof(*new_info) * new_allocated);
              }
              else
              {
                  new_allocated = 16;
                  new_info = heap_alloc(sizeof(*new_info) * new_allocated);
              }
              if (!new_info)
              {
                  p_krb5_free_cred_contents(context, &credentials);
                  status = STATUS_NO_MEMORY;
                  break;
              }
  
              info->info = new_info;
              info->allocated = new_allocated;
          }
  
          error = p_krb5_unparse_name_flags(context, credentials.server, 0, &name_with_realm);
          if (error)
          {
              p_krb5_free_cred_contents(context, &credentials);
              status = krb5_error_to_status(error);
              break;
          }
  
          TRACE("name_with_realm: %s\n", debugstr_a(name_with_realm));
  
          error = p_krb5_unparse_name_flags(context, credentials.server,
              KRB5_PRINCIPAL_UNPARSE_NO_REALM, &name_without_realm);
          if (error)
          {
              p_krb5_free_unparsed_name(context, name_with_realm);
              p_krb5_free_cred_contents(context, &credentials);
              status = krb5_error_to_status(error);
              break;
          }
  
          TRACE("name_without_realm: %s\n", debugstr_a(name_without_realm));
  
          name_without_realmW = utf8_to_wstr(name_without_realm);
          RtlInitUnicodeString(&info->info[info->count].ServerName, name_without_realmW);
  
          realm_name = strchr(name_with_realm, '@');
          if (!realm_name)
          {
              ERR("wrong name with realm %s\n", debugstr_a(name_with_realm));
              realm_name = name_with_realm;
          }
          else
              realm_name++;
  
          /* realm_name - now contains only realm! */
  
          realm_nameW = utf8_to_wstr(realm_name);
          RtlInitUnicodeString(&info->info[info->count].RealmName, realm_nameW);
  
          if (!credentials.times.starttime)
              credentials.times.starttime = credentials.times.authtime;
  
          /* TODO: if krb5_is_config_principal = true */
          RtlSecondsSince1970ToTime(credentials.times.starttime, &info->info[info->count].StartTime);
          RtlSecondsSince1970ToTime(credentials.times.endtime, &info->info[info->count].EndTime);
          RtlSecondsSince1970ToTime(credentials.times.renew_till, &info->info[info->count].RenewTime);
  
          info->info[info->count].TicketFlags = credentials.ticket_flags;
  
          error = p_krb5_decode_ticket(&credentials.ticket, &ticket);
  
          p_krb5_free_unparsed_name(context, name_with_realm);
          p_krb5_free_unparsed_name(context, name_without_realm);
          p_krb5_free_cred_contents(context, &credentials);
  
          if (error)
          {
              status = krb5_error_to_status(error);
              break;
          }
  
          info->info[info->count].EncryptionType = ticket->enc_part.enctype;
  
          p_krb5_free_ticket(context, ticket);
  
          info->count++;
      }
  
      p_krb5_cc_end_seq_get(context, cache, &cursor);
  
      return status;
  }
  
  static inline void init_client_us(UNICODE_STRING *dst, void *client_ws, const UNICODE_STRING *src)
  {
      dst->Buffer = client_ws;
      dst->Length = src->Length;
      dst->MaximumLength = src->MaximumLength;
  }
  
  static NTSTATUS copy_to_client(PLSA_CLIENT_REQUEST lsa_req, struct ticket_info *info, void **out, ULONG *out_size)
  {
      NTSTATUS status;
      ULONG i;
      SIZE_T size, client_str_off;
      char *client_resp, *client_ticket, *client_str;
      KERB_QUERY_TKT_CACHE_RESPONSE resp;
  
      size = sizeof(KERB_QUERY_TKT_CACHE_RESPONSE);
      if (info->count != 0)
          size += (info->count - 1) * sizeof(KERB_TICKET_CACHE_INFO);
  
      client_str_off = size;
  
      for (i = 0; i < info->count; i++)
      {
          size += info->info[i].RealmName.MaximumLength;
          size += info->info[i].ServerName.MaximumLength;
      }
  
      status = lsa_dispatch.AllocateClientBuffer(lsa_req, size, (void **)&client_resp);
      if (status != STATUS_SUCCESS) return status;
  
      resp.MessageType = KerbQueryTicketCacheMessage;
      resp.CountOfTickets = info->count;
      size = FIELD_OFFSET(KERB_QUERY_TKT_CACHE_RESPONSE, Tickets);
      status = lsa_dispatch.CopyToClientBuffer(lsa_req, size, client_resp, &resp);
      if (status != STATUS_SUCCESS) goto fail;
  
      if (!info->count)
      {
          *out = client_resp;
          *out_size = sizeof(resp);
          return STATUS_SUCCESS;
      }
  
      *out_size = size;
  
      client_ticket = client_resp + size;
      client_str = client_resp + client_str_off;
  
      for (i = 0; i < info->count; i++)
      {
          KERB_TICKET_CACHE_INFO ticket;
  
          ticket = info->info[i];
  
          init_client_us(&ticket.RealmName, client_str, &info->info[i].RealmName);
  
          size = info->info[i].RealmName.MaximumLength;
          status = lsa_dispatch.CopyToClientBuffer(lsa_req, size, client_str, info->info[i].RealmName.Buffer);
          if (status != STATUS_SUCCESS) goto fail;
          client_str += size;
          *out_size += size;
  
          init_client_us(&ticket.ServerName, client_str, &info->info[i].ServerName);
  
          size = info->info[i].ServerName.MaximumLength;
          status = lsa_dispatch.CopyToClientBuffer(lsa_req, size, client_str, info->info[i].ServerName.Buffer);
          if (status != STATUS_SUCCESS) goto fail;
          client_str += size;
          *out_size += size;
  
          status = lsa_dispatch.CopyToClientBuffer(lsa_req, sizeof(ticket), client_ticket, &ticket);
          if (status != STATUS_SUCCESS) goto fail;
  
          client_ticket += sizeof(ticket);
          *out_size += sizeof(ticket);
      }
  
      *out = client_resp;
      return STATUS_SUCCESS;
  
  fail:
      lsa_dispatch.FreeClientBuffer(lsa_req, client_resp);
      return status;
  }
  
  static NTSTATUS query_ticket_cache(PLSA_CLIENT_REQUEST lsa_req, void *in, ULONG in_len, void **out, ULONG *out_len)
  {
      NTSTATUS status;
      KERB_QUERY_TKT_CACHE_REQUEST *query;
      struct ticket_info info;
      krb5_error_code error;
      krb5_context context = NULL;
      krb5_cccol_cursor cursor = NULL;
      krb5_ccache cache;
  
      if (!in || in_len != sizeof(KERB_QUERY_TKT_CACHE_REQUEST) || !out || !out_len)
          return STATUS_INVALID_PARAMETER;
  
      query = (KERB_QUERY_TKT_CACHE_REQUEST *)in;
  
      if (query->LogonId.HighPart != 0 || query->LogonId.LowPart != 0)
          return STATUS_ACCESS_DENIED;
  
      info.count = 0;
      info.allocated = 0;
      info.info = NULL;
  
      error = p_krb5_init_context(&context);
      if (error)
      {
          status = krb5_error_to_status(error);
          goto done;
      }
  
      error = p_krb5_cccol_cursor_new(context, &cursor);
      if (error)
      {
          status = krb5_error_to_status(error);
          goto done;
      }
  
      for (;;)
      {
          error = p_krb5_cccol_cursor_next(context, cursor, &cache);
          if (error)
          {
              status = krb5_error_to_status(error);
              goto done;
          }
          if (!cache) break;
  
          status = copy_tickets_from_cache(context, cache, &info);
  
          p_krb5_cc_close(context, cache);
  
          if (status != STATUS_SUCCESS)
              goto done;
      }
  
      status = copy_to_client(lsa_req, &info, out, out_len);
  
  done:
      if (cursor)
          p_krb5_cccol_cursor_free(context, &cursor);
  
      if (context)
          p_krb5_free_context(context);
  
      free_ticket_info(&info);
  
      return status;
  }
  
  #else /* SONAME_LIBKRB5 */
  
  static NTSTATUS query_ticket_cache(PLSA_CLIENT_REQUEST lsa_req, void *in, ULONG in_len, void **out, ULONG *out_len)
  {
      FIXME("%p,%p,%u,%p,%p: stub\n", lsa_req, in, in_len, out, out_len);
      return STATUS_NOT_IMPLEMENTED;
  }
  
  #endif /* SONAME_LIBKRB5 */
  
  static NTSTATUS NTAPI kerberos_LsaApCallPackageUntrusted(PLSA_CLIENT_REQUEST request,
      PVOID in_buffer, PVOID client_buffer_base, ULONG in_buffer_length,
      PVOID *out_buffer, PULONG out_buffer_length, PNTSTATUS status)
  {
      KERB_PROTOCOL_MESSAGE_TYPE msg;
  
      TRACE("%p,%p,%p,%u,%p,%p,%p\n", request, in_buffer, client_buffer_base,
          in_buffer_length, out_buffer, out_buffer_length, status);
  
      if (!in_buffer || in_buffer_length < sizeof(msg))
          return STATUS_INVALID_PARAMETER;
  
      msg = *(KERB_PROTOCOL_MESSAGE_TYPE *)in_buffer;
  
      switch (msg)
      {
      case KerbQueryTicketCacheMessage:
          *status = query_ticket_cache(request, in_buffer, in_buffer_length, out_buffer, out_buffer_length);
          break;
  
      case KerbRetrieveTicketMessage:
          FIXME("KerbRetrieveTicketMessage stub\n");
          *status = STATUS_NOT_IMPLEMENTED;
          break;
  
      case KerbPurgeTicketCacheMessage:
          FIXME("KerbPurgeTicketCacheMessage stub\n");
          *status = STATUS_NOT_IMPLEMENTED;
          break;
  
      default: /* All other requests should call LsaApCallPackage */
          WARN("%u => access denied\n", msg);
          *status = STATUS_ACCESS_DENIED;
          break;
      }
  
      return *status;
  }
  
  static NTSTATUS NTAPI kerberos_SpGetInfo(SecPkgInfoW *info)
  {
      TRACE("%p\n", info);
  
      /* LSA will make a copy before forwarding the structure, so
       * it's safe to put pointers to dynamic or constant data there.
       */
      *info = infoW;
  
      return STATUS_SUCCESS;
  }
  
  #ifdef SONAME_LIBGSSAPI_KRB5
  
  WINE_DECLARE_DEBUG_CHANNEL(winediag);
  static void *libgssapi_krb5_handle;
  
  #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  MAKE_FUNCPTR(gss_accept_sec_context);
  MAKE_FUNCPTR(gss_acquire_cred);
  MAKE_FUNCPTR(gss_delete_sec_context);
  MAKE_FUNCPTR(gss_display_status);
  MAKE_FUNCPTR(gss_get_mic);
  MAKE_FUNCPTR(gss_import_name);
  MAKE_FUNCPTR(gss_init_sec_context);
  MAKE_FUNCPTR(gss_inquire_context);
  MAKE_FUNCPTR(gss_release_buffer);
  MAKE_FUNCPTR(gss_release_cred);
  MAKE_FUNCPTR(gss_release_iov_buffer);
  MAKE_FUNCPTR(gss_release_name);
  MAKE_FUNCPTR(gss_unwrap);
  MAKE_FUNCPTR(gss_unwrap_iov);
  MAKE_FUNCPTR(gss_verify_mic);
  MAKE_FUNCPTR(gss_wrap);
  MAKE_FUNCPTR(gss_wrap_iov);
  #undef MAKE_FUNCPTR
  
  static BOOL load_gssapi_krb5(void)
  {
      if (!(libgssapi_krb5_handle = dlopen( SONAME_LIBGSSAPI_KRB5, RTLD_NOW )))
      {
          ERR_(winediag)( "Failed to load libgssapi_krb5, Kerberos SSP support will not be available.\n" );
          return FALSE;
      }
  
  #define LOAD_FUNCPTR(f) \
      if (!(p##f = dlsym( libgssapi_krb5_handle, #f ))) \
      { \
          ERR( "Failed to load %s\n", #f ); \
          goto fail; \
      }
  
      LOAD_FUNCPTR(gss_accept_sec_context)
      LOAD_FUNCPTR(gss_acquire_cred)
      LOAD_FUNCPTR(gss_delete_sec_context)
      LOAD_FUNCPTR(gss_display_status)
      LOAD_FUNCPTR(gss_get_mic)
      LOAD_FUNCPTR(gss_import_name)
      LOAD_FUNCPTR(gss_init_sec_context)
      LOAD_FUNCPTR(gss_inquire_context)
      LOAD_FUNCPTR(gss_release_buffer)
      LOAD_FUNCPTR(gss_release_cred)
      LOAD_FUNCPTR(gss_release_iov_buffer)
      LOAD_FUNCPTR(gss_release_name)
      LOAD_FUNCPTR(gss_unwrap)
      LOAD_FUNCPTR(gss_unwrap_iov)
      LOAD_FUNCPTR(gss_verify_mic)
      LOAD_FUNCPTR(gss_wrap)
      LOAD_FUNCPTR(gss_wrap_iov)
  #undef LOAD_FUNCPTR
  
      return TRUE;
  
  fail:
      dlclose( libgssapi_krb5_handle );
      libgssapi_krb5_handle = NULL;
      return FALSE;
  }
  
  static void unload_gssapi_krb5(void)
  {
      dlclose( libgssapi_krb5_handle );
      libgssapi_krb5_handle = NULL;
  }
  
  static inline gss_cred_id_t credhandle_sspi_to_gss( LSA_SEC_HANDLE cred )
  {
      if (!cred) return GSS_C_NO_CREDENTIAL;
      return (gss_cred_id_t)cred;
  }
  
  static inline void credhandle_gss_to_sspi( gss_cred_id_t handle, LSA_SEC_HANDLE *cred )
  {
      *cred = (LSA_SEC_HANDLE)handle;
  }
  
  static inline gss_ctx_id_t ctxthandle_sspi_to_gss( LSA_SEC_HANDLE ctxt )
  {
      if (!ctxt) return GSS_C_NO_CONTEXT;
      return (gss_ctx_id_t)ctxt;
  }
  
  static inline void ctxthandle_gss_to_sspi( gss_ctx_id_t handle, LSA_SEC_HANDLE *ctxt )
  {
      *ctxt = (LSA_SEC_HANDLE)handle;
  }
  
  static NTSTATUS status_gss_to_sspi( OM_uint32 status )
  {
      switch (status)
      {
      case GSS_S_COMPLETE:             return SEC_E_OK;
      case GSS_S_BAD_MECH:             return SEC_E_SECPKG_NOT_FOUND;
      case GSS_S_BAD_SIG:              return SEC_E_MESSAGE_ALTERED;
      case GSS_S_NO_CRED:              return SEC_E_NO_CREDENTIALS;
      case GSS_S_NO_CONTEXT:           return SEC_E_INVALID_HANDLE;
      case GSS_S_DEFECTIVE_TOKEN:      return SEC_E_INVALID_TOKEN;
      case GSS_S_DEFECTIVE_CREDENTIAL: return SEC_E_NO_CREDENTIALS;
      case GSS_S_CREDENTIALS_EXPIRED:  return SEC_E_CONTEXT_EXPIRED;
      case GSS_S_CONTEXT_EXPIRED:      return SEC_E_CONTEXT_EXPIRED;
      case GSS_S_BAD_QOP:              return SEC_E_QOP_NOT_SUPPORTED;
      case GSS_S_CONTINUE_NEEDED:      return SEC_I_CONTINUE_NEEDED;
      case GSS_S_DUPLICATE_TOKEN:      return SEC_E_INVALID_TOKEN;
      case GSS_S_OLD_TOKEN:            return SEC_E_INVALID_TOKEN;
      case GSS_S_UNSEQ_TOKEN:          return SEC_E_OUT_OF_SEQUENCE;
      case GSS_S_GAP_TOKEN:            return SEC_E_OUT_OF_SEQUENCE;
      case GSS_S_FAILURE:              return SEC_E_INTERNAL_ERROR;
  
      default:
          FIXME( "couldn't convert status 0x%08x to NTSTATUS\n", status );
          return SEC_E_INTERNAL_ERROR;
      }
  }
  
  static void trace_gss_status_ex( OM_uint32 code, int type )
  {
      OM_uint32 ret, minor_status;
      gss_buffer_desc buf;
      OM_uint32 message_context = 0;
  
      for (;;)
      {
          ret = pgss_display_status( &minor_status, code, type, GSS_C_NULL_OID, &message_context, &buf );
          if (GSS_ERROR(ret))
          {
              TRACE( "gss_display_status(0x%08x,%d) returned %08x minor status %08x\n",
                     code, type, ret, minor_status );
              return;
          }
          TRACE( "GSS-API error: 0x%08x: %s\n", code, debugstr_an(buf.value, buf.length) );
          pgss_release_buffer( &minor_status, &buf );
  
          if (!message_context) return;
      }
  }
  
  static void trace_gss_status( OM_uint32 major_status, OM_uint32 minor_status )
  {
      if (TRACE_ON(kerberos))
      {
          trace_gss_status_ex( major_status, GSS_C_GSS_CODE );
          trace_gss_status_ex( minor_status, GSS_C_MECH_CODE );
      }
  }
  
  static void expirytime_gss_to_sspi( OM_uint32 expirytime, TimeStamp *timestamp )
  {
      FILETIME filetime;
      ULARGE_INTEGER tmp;
  
      GetSystemTimeAsFileTime( &filetime );
      FileTimeToLocalFileTime( &filetime, &filetime );
      tmp.QuadPart = ((ULONGLONG)filetime.dwLowDateTime | (ULONGLONG)filetime.dwHighDateTime << 32) + expirytime;
      timestamp->LowPart  = tmp.QuadPart;
      timestamp->HighPart = tmp.QuadPart >> 32;
  }
  
  static NTSTATUS name_sspi_to_gss( const UNICODE_STRING *name_str, gss_name_t *name )
  {
      OM_uint32 ret, minor_status;
      gss_OID type = GSS_C_NO_OID; /* FIXME: detect the appropriate value for this ourselves? */
      gss_buffer_desc buf;
  
      buf.length = WideCharToMultiByte( CP_UNIXCP, 0, name_str->Buffer, name_str->Length / sizeof(WCHAR), NULL, 0, NULL, NULL );
      if (!(buf.value = heap_alloc( buf.length ))) return SEC_E_INSUFFICIENT_MEMORY;
      WideCharToMultiByte( CP_UNIXCP, 0, name_str->Buffer, name_str->Length / sizeof(WCHAR), buf.value, buf.length, NULL, NULL );
  
      ret = pgss_import_name( &minor_status, &buf, type, name );
      TRACE( "gss_import_name returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
  
      heap_free( buf.value );
      return status_gss_to_sspi( ret );
  }
  
  static ULONG flags_isc_req_to_gss( ULONG flags )
  {
      ULONG ret = 0;
      if (flags & ISC_REQ_DELEGATE)        ret |= GSS_C_DELEG_FLAG;
      if (flags & ISC_REQ_MUTUAL_AUTH)     ret |= GSS_C_MUTUAL_FLAG;
      if (flags & ISC_REQ_REPLAY_DETECT)   ret |= GSS_C_REPLAY_FLAG;
      if (flags & ISC_REQ_SEQUENCE_DETECT) ret |= GSS_C_SEQUENCE_FLAG;
      if (flags & ISC_REQ_CONFIDENTIALITY) ret |= GSS_C_CONF_FLAG;
      if (flags & ISC_REQ_INTEGRITY)       ret |= GSS_C_INTEG_FLAG;
      if (flags & ISC_REQ_NULL_SESSION)    ret |= GSS_C_ANON_FLAG;
      if (flags & ISC_REQ_USE_DCE_STYLE)   ret |= GSS_C_DCE_STYLE;
      if (flags & ISC_REQ_IDENTIFY)        ret |= GSS_C_IDENTIFY_FLAG;
      return ret;
  }
  
  static ULONG flags_gss_to_isc_ret( ULONG flags )
  {
      ULONG ret = 0;
      if (flags & GSS_C_DELEG_FLAG)    ret |= ISC_RET_DELEGATE;
      if (flags & GSS_C_MUTUAL_FLAG)   ret |= ISC_RET_MUTUAL_AUTH;
      if (flags & GSS_C_REPLAY_FLAG)   ret |= ISC_RET_REPLAY_DETECT;
      if (flags & GSS_C_SEQUENCE_FLAG) ret |= ISC_RET_SEQUENCE_DETECT;
      if (flags & GSS_C_CONF_FLAG)     ret |= ISC_RET_CONFIDENTIALITY;
      if (flags & GSS_C_INTEG_FLAG)    ret |= ISC_RET_INTEGRITY;
      if (flags & GSS_C_ANON_FLAG)     ret |= ISC_RET_NULL_SESSION;
      if (flags & GSS_C_DCE_STYLE)     ret |= ISC_RET_USED_DCE_STYLE;
      if (flags & GSS_C_IDENTIFY_FLAG) ret |= ISC_RET_IDENTIFY;
      return ret;
  }
  
  static ULONG flags_gss_to_asc_ret( ULONG flags )
  {
      ULONG ret = 0;
      if (flags & GSS_C_DELEG_FLAG)    ret |= ASC_RET_DELEGATE;
      if (flags & GSS_C_MUTUAL_FLAG)   ret |= ASC_RET_MUTUAL_AUTH;
      if (flags & GSS_C_REPLAY_FLAG)   ret |= ASC_RET_REPLAY_DETECT;
      if (flags & GSS_C_SEQUENCE_FLAG) ret |= ASC_RET_SEQUENCE_DETECT;
      if (flags & GSS_C_CONF_FLAG)     ret |= ASC_RET_CONFIDENTIALITY;
      if (flags & GSS_C_INTEG_FLAG)    ret |= ASC_RET_INTEGRITY;
      if (flags & GSS_C_ANON_FLAG)     ret |= ASC_RET_NULL_SESSION;
      if (flags & GSS_C_DCE_STYLE)     ret |= ASC_RET_USED_DCE_STYLE;
      if (flags & GSS_C_IDENTIFY_FLAG) ret |= ASC_RET_IDENTIFY;
      return ret;
  }
  
  static BOOL is_dce_style_context( gss_ctx_id_t ctxt_handle )
  {
      OM_uint32 ret, minor_status, flags;
      ret = pgss_inquire_context( &minor_status, ctxt_handle, NULL, NULL, NULL, NULL, &flags, NULL, NULL );
      return (ret == GSS_S_COMPLETE && (flags & GSS_C_DCE_STYLE));
  }
  
  static int get_buffer_index( SecBufferDesc *desc, DWORD type )
  {
      UINT i;
      if (!desc) return -1;
      for (i = 0; i < desc->cBuffers; i++)
      {
          if (desc->pBuffers[i].BufferType == type) return i;
      }
      return -1;
  }
  
  static char *get_user_at_domain( const WCHAR *user, ULONG user_len, const WCHAR *domain, ULONG domain_len )
  {
      int len_user, len_domain;
      char *ret;
  
      len_user = WideCharToMultiByte( CP_UNIXCP, 0, user, user_len, NULL, 0, NULL, NULL );
      len_domain = WideCharToMultiByte( CP_UNIXCP, 0, domain, domain_len, NULL, 0, NULL, NULL );
      if (!(ret = heap_alloc( len_user + len_domain + 2 ))) return NULL;
  
      WideCharToMultiByte( CP_UNIXCP, 0, user, user_len, ret, len_user, NULL, NULL );
      ret[len_user] = '@';
      WideCharToMultiByte( CP_UNIXCP, 0, domain, domain_len, ret + len_user + 1, len_domain, NULL, NULL );
      ret[len_user + len_domain + 1] = 0;
      return ret;
  }
  
  static char *get_password( const WCHAR *passwd, ULONG passwd_len )
  {
      int len;
      char *ret;
  
      len = WideCharToMultiByte( CP_UNIXCP, WC_NO_BEST_FIT_CHARS, passwd, passwd_len, NULL, 0, NULL, NULL );
      if (!(ret = heap_alloc( len + 1 ))) return NULL;
      WideCharToMultiByte( CP_UNIXCP, 0, passwd, passwd_len, ret, len, NULL, NULL );
      ret[len] = 0;
      return ret;
  }
  
  static NTSTATUS init_creds( const SEC_WINNT_AUTH_IDENTITY_W *id )
  {
      char *user_at_domain, *password;
      krb5_context ctx;
      krb5_principal principal = NULL;
      krb5_get_init_creds_opt *options = NULL;
      krb5_ccache cache = NULL;
      krb5_creds creds;
      krb5_error_code err;
  
      if (!id) return STATUS_SUCCESS;
      if (id->Flags & SEC_WINNT_AUTH_IDENTITY_ANSI)
      {
          FIXME( "ANSI identity not supported\n" );
          return SEC_E_UNSUPPORTED_FUNCTION;
      }
      if (!(user_at_domain = get_user_at_domain( id->User, id->UserLength, id->Domain, id->DomainLength )))
      {
          return SEC_E_INSUFFICIENT_MEMORY;
      }
      if (!(password = get_password( id->Password, id->PasswordLength )))
      {
          heap_free( user_at_domain );
          return SEC_E_INSUFFICIENT_MEMORY;
      }
  
      if ((err = p_krb5_init_context( &ctx )))
      {
          heap_free( password );
          heap_free( user_at_domain );
          return krb5_error_to_status( err );
      }
      if ((err = p_krb5_parse_name_flags( ctx, user_at_domain, 0, &principal ))) goto done;
      if ((err = p_krb5_cc_default( ctx, &cache ))) goto done;
      if ((err = p_krb5_get_init_creds_opt_alloc( ctx, &options ))) goto done;
      if ((err = p_krb5_get_init_creds_opt_set_out_ccache( ctx, options, cache ))) goto done;
      if ((err = p_krb5_get_init_creds_password( ctx, &creds, principal, password, 0, NULL, 0, NULL, 0 ))) goto done;
      if ((err = p_krb5_cc_initialize( ctx, cache, principal ))) goto done;
      if ((err = p_krb5_cc_store_cred( ctx, cache, &creds ))) goto done;
  
      TRACE( "success\n" );
      p_krb5_free_cred_contents( ctx, &creds );
  
  done:
      if (cache) p_krb5_cc_close( ctx, cache );
      if (principal) p_krb5_free_principal( ctx, principal );
      if (options) p_krb5_get_init_creds_opt_free( ctx, options );
      p_krb5_free_context( ctx );
      heap_free( user_at_domain );
      heap_free( password );
  
      return krb5_error_to_status( err );
  }
  
  static NTSTATUS acquire_credentials_handle( UNICODE_STRING *principal_us, gss_cred_usage_t cred_usage,
      LSA_SEC_HANDLE *credential, TimeStamp *ts_expiry )
  {
      OM_uint32 ret, minor_status, expiry_time;
      gss_name_t principal = GSS_C_NO_NAME;
      gss_cred_id_t cred_handle;
      NTSTATUS status;
  
      if (principal_us && ((status = name_sspi_to_gss( principal_us, &principal )) != SEC_E_OK)) return status;
  
      ret = pgss_acquire_cred( &minor_status, principal, GSS_C_INDEFINITE, GSS_C_NULL_OID_SET, cred_usage,
                                &cred_handle, NULL, &expiry_time );
      TRACE( "gss_acquire_cred returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE)
      {
          credhandle_gss_to_sspi( cred_handle, credential );
          expirytime_gss_to_sspi( expiry_time, ts_expiry );
      }
  
      if (principal != GSS_C_NO_NAME) pgss_release_name( &minor_status, &principal );
  
      return status_gss_to_sspi( ret );
  }
  #endif /* SONAME_LIBGSSAPI_KRB5 */
  
  static NTSTATUS NTAPI kerberos_SpAcquireCredentialsHandle(
      UNICODE_STRING *principal_us, ULONG credential_use, LUID *logon_id, void *auth_data,
      void *get_key_fn, void *get_key_arg, LSA_SEC_HANDLE *credential, TimeStamp *ts_expiry )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      gss_cred_usage_t cred_usage;
      NTSTATUS status;
  
      TRACE( "(%s 0x%08x %p %p %p %p %p %p)\n", debugstr_us(principal_us), credential_use,
             logon_id, auth_data, get_key_fn, get_key_arg, credential, ts_expiry );
  
      switch (credential_use)
      {
      case SECPKG_CRED_INBOUND:
          cred_usage = GSS_C_ACCEPT;
          break;
  
      case SECPKG_CRED_OUTBOUND:
          if ((status = init_creds( auth_data )) != STATUS_SUCCESS) return status;
          cred_usage = GSS_C_INITIATE;
          break;
  
      case SECPKG_CRED_BOTH:
          cred_usage = GSS_C_BOTH;
          break;
  
      default:
          return SEC_E_UNKNOWN_CREDENTIALS;
      }
  
      return acquire_credentials_handle( principal_us, cred_usage, credential, ts_expiry );
  #else
      FIXME( "(%s 0x%08x %p %p %p %p %p %p)\n", debugstr_us(principal_us), credential_use,
             logon_id, auth_data, get_key_fn, get_key_arg, credential, ts_expiry );
      FIXME( "Wine was built without Kerberos support.\n" );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static NTSTATUS NTAPI kerberos_SpFreeCredentialsHandle( LSA_SEC_HANDLE credential )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      OM_uint32 ret, minor_status;
      gss_cred_id_t cred_handle;
  
      TRACE( "(%lx)\n", credential );
  
      if (!credential) return SEC_E_INVALID_HANDLE;
      if (!(cred_handle = credhandle_sspi_to_gss( credential ))) return SEC_E_OK;
  
      ret = pgss_release_cred( &minor_status, &cred_handle );
      TRACE( "gss_release_cred returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
  
      return status_gss_to_sspi( ret );
  #else
      FIXME( "(%lx)\n", credential );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static NTSTATUS NTAPI kerberos_SpInitLsaModeContext( LSA_SEC_HANDLE credential, LSA_SEC_HANDLE context,
      UNICODE_STRING *target_name, ULONG context_req, ULONG target_data_rep, SecBufferDesc *input,
      LSA_SEC_HANDLE *new_context, SecBufferDesc *output, ULONG *context_attr, TimeStamp *ts_expiry,
      BOOLEAN *mapped_context, SecBuffer *context_data )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      static const ULONG supported = ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY | ISC_REQ_SEQUENCE_DETECT |
                                     ISC_REQ_REPLAY_DETECT | ISC_REQ_MUTUAL_AUTH | ISC_REQ_USE_DCE_STYLE |
                                     ISC_REQ_IDENTIFY | ISC_REQ_CONNECTION;
      OM_uint32 ret, minor_status, ret_flags = 0, expiry_time, req_flags = flags_isc_req_to_gss( context_req );
      gss_cred_id_t cred_handle;
      gss_ctx_id_t ctxt_handle;
      gss_buffer_desc input_token, output_token;
      gss_name_t target = GSS_C_NO_NAME;
      NTSTATUS status;
      int idx;
  
      TRACE( "(%lx %lx %s 0x%08x %u %p %p %p %p %p %p %p)\n", credential, context, debugstr_us(target_name),
             context_req, target_data_rep, input, new_context, output, context_attr, ts_expiry,
             mapped_context, context_data );
      if (context_req & ~supported)
          FIXME( "flags 0x%08x not supported\n", context_req & ~supported );
  
      if (!context && !input && !credential) return SEC_E_INVALID_HANDLE;
      cred_handle = credhandle_sspi_to_gss( credential );
      ctxt_handle = ctxthandle_sspi_to_gss( context );
  
      if ((idx = get_buffer_index( input, SECBUFFER_TOKEN )) == -1) input_token.length = 0;
      else
      {
          input_token.length = input->pBuffers[idx].cbBuffer;
          input_token.value  = input->pBuffers[idx].pvBuffer;
      }
  
      if ((idx = get_buffer_index( output, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
      output_token.length = 0;
      output_token.value  = NULL;
  
      if (target_name && ((status = name_sspi_to_gss( target_name, &target )) != SEC_E_OK)) return status;
  
      ret = pgss_init_sec_context( &minor_status, cred_handle, &ctxt_handle, target, GSS_C_NO_OID, req_flags, 0,
                                   GSS_C_NO_CHANNEL_BINDINGS, &input_token, NULL, &output_token, &ret_flags,
                                   &expiry_time );
      TRACE( "gss_init_sec_context returned %08x minor status %08x ret_flags %08x\n", ret, minor_status, ret_flags );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED)
      {
          if (output_token.length > output->pBuffers[idx].cbBuffer) /* FIXME: check if larger buffer exists */
          {
              TRACE( "buffer too small %lu > %u\n", (SIZE_T)output_token.length, output->pBuffers[idx].cbBuffer );
              pgss_release_buffer( &minor_status, &output_token );
              pgss_delete_sec_context( &minor_status, &ctxt_handle, GSS_C_NO_BUFFER );
              return SEC_E_INCOMPLETE_MESSAGE;
          }
          output->pBuffers[idx].cbBuffer = output_token.length;
          memcpy( output->pBuffers[idx].pvBuffer, output_token.value, output_token.length );
          pgss_release_buffer( &minor_status, &output_token );
  
          ctxthandle_gss_to_sspi( ctxt_handle, new_context );
          if (context_attr) *context_attr = flags_gss_to_isc_ret( ret_flags );
          expirytime_gss_to_sspi( expiry_time, ts_expiry );
      }
  
      if (target != GSS_C_NO_NAME) pgss_release_name( &minor_status, &target );
  
      /* we do support user mode SSP/AP functions */
      *mapped_context = TRUE;
      /* FIXME: initialize context_data */
  
      return status_gss_to_sspi( ret );
  #else
      FIXME( "(%lx %lx %s 0x%08x %u %p %p %p %p %p %p %p)\n", credential, context, debugstr_us(target_name),
             context_req, target_data_rep, input, new_context, output, context_attr, ts_expiry,
             mapped_context, context_data );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static NTSTATUS NTAPI kerberos_SpAcceptLsaModeContext( LSA_SEC_HANDLE credential, LSA_SEC_HANDLE context,
      SecBufferDesc *input, ULONG context_req, ULONG target_data_rep, LSA_SEC_HANDLE *new_context,
      SecBufferDesc *output, ULONG *context_attr, TimeStamp *ts_expiry, BOOLEAN *mapped_context, SecBuffer *context_data )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      OM_uint32 ret, minor_status, ret_flags = 0, expiry_time;
      gss_cred_id_t cred_handle;
      gss_ctx_id_t ctxt_handle;
      gss_buffer_desc input_token, output_token;
      gss_name_t target = GSS_C_NO_NAME;
      int idx;
  
      TRACE( "(%lx %lx 0x%08x %u %p %p %p %p %p %p %p)\n", credential, context, context_req,
             target_data_rep, input, new_context, output, context_attr, ts_expiry,
             mapped_context, context_data );
      if (context_req) FIXME( "ignoring flags 0x%08x\n", context_req );
  
      if (!context && !input && !credential) return SEC_E_INVALID_HANDLE;
      cred_handle = credhandle_sspi_to_gss( credential );
      ctxt_handle = ctxthandle_sspi_to_gss( context );
  
      if (!input) input_token.length = 0;
      else
      {
          if ((idx = get_buffer_index( input, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
          input_token.length = input->pBuffers[idx].cbBuffer;
          input_token.value  = input->pBuffers[idx].pvBuffer;
      }
  
      if ((idx = get_buffer_index( output, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
      output_token.length = 0;
      output_token.value  = NULL;
  
      ret = pgss_accept_sec_context( &minor_status, &ctxt_handle, cred_handle, &input_token, GSS_C_NO_CHANNEL_BINDINGS,
                                     &target, NULL, &output_token, &ret_flags, &expiry_time, NULL );
      TRACE( "gss_accept_sec_context returned %08x minor status %08x ret_flags %08x\n", ret, minor_status, ret_flags );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE || ret == GSS_S_CONTINUE_NEEDED)
      {
          if (output_token.length > output->pBuffers[idx].cbBuffer) /* FIXME: check if larger buffer exists */
          {
              TRACE( "buffer too small %lu > %u\n", (SIZE_T)output_token.length, output->pBuffers[idx].cbBuffer );
              pgss_release_buffer( &minor_status, &output_token );
              pgss_delete_sec_context( &minor_status, &ctxt_handle, GSS_C_NO_BUFFER );
              return SEC_E_BUFFER_TOO_SMALL;
          }
          output->pBuffers[idx].cbBuffer = output_token.length;
          memcpy( output->pBuffers[idx].pvBuffer, output_token.value, output_token.length );
          pgss_release_buffer( &minor_status, &output_token );
  
          ctxthandle_gss_to_sspi( ctxt_handle, new_context );
          if (context_attr) *context_attr = flags_gss_to_asc_ret( ret_flags );
          expirytime_gss_to_sspi( expiry_time, ts_expiry );
      }
  
      /* we do support user mode SSP/AP functions */
      *mapped_context = TRUE;
      /* FIXME: initialize context_data */
  
      return status_gss_to_sspi( ret );
  #else
      FIXME( "(%lx %lx 0x%08x %u %p %p %p %p %p %p %p)\n", credential, context, context_req,
             target_data_rep, input, new_context, output, context_attr, ts_expiry,
             mapped_context, context_data );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static NTSTATUS NTAPI kerberos_SpDeleteContext( LSA_SEC_HANDLE context )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      OM_uint32 ret, minor_status;
      gss_ctx_id_t ctxt_handle;
  
      TRACE( "(%lx)\n", context );
      if (!context) return SEC_E_INVALID_HANDLE;
      if (!(ctxt_handle = ctxthandle_sspi_to_gss( context ))) return SEC_E_OK;
  
      ret = pgss_delete_sec_context( &minor_status, &ctxt_handle, GSS_C_NO_BUFFER );
      TRACE( "gss_delete_sec_context returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
  
      return status_gss_to_sspi( ret );
  #else
      FIXME( "(%lx)\n", context );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static SecPkgInfoW *build_package_info( const SecPkgInfoW *info )
  {
      SecPkgInfoW *ret;
      DWORD size_name = (strlenW(info->Name) + 1) * sizeof(WCHAR);
      DWORD size_comment = (strlenW(info->Comment) + 1) * sizeof(WCHAR);
  
      if (!(ret = heap_alloc( sizeof(*ret) + size_name + size_comment ))) return NULL;
      ret->fCapabilities = info->fCapabilities;
      ret->wVersion      = info->wVersion;
      ret->wRPCID        = info->wRPCID;
      ret->cbMaxToken    = info->cbMaxToken;
      ret->Name          = (SEC_WCHAR *)(ret + 1);
      memcpy( ret->Name, info->Name, size_name );
      ret->Comment       = (SEC_WCHAR *)((char *)ret->Name + size_name);
      memcpy( ret->Comment, info->Comment, size_comment );
      return ret;
  }
  
  static NTSTATUS NTAPI kerberos_SpQueryContextAttributes( LSA_SEC_HANDLE context, ULONG attribute, void *buffer )
  {
      TRACE( "(%lx %u %p)\n", context, attribute, buffer );
  
      if (!context) return SEC_E_INVALID_HANDLE;
  
      switch (attribute)
      {
  #define X(x) case (x) : FIXME(#x" stub\n"); break
      X(SECPKG_ATTR_ACCESS_TOKEN);
      X(SECPKG_ATTR_AUTHORITY);
      X(SECPKG_ATTR_DCE_INFO);
      X(SECPKG_ATTR_KEY_INFO);
      X(SECPKG_ATTR_LIFESPAN);
      X(SECPKG_ATTR_NAMES);
      X(SECPKG_ATTR_NATIVE_NAMES);
      X(SECPKG_ATTR_PACKAGE_INFO);
      X(SECPKG_ATTR_PASSWORD_EXPIRY);
      X(SECPKG_ATTR_SESSION_KEY);
      X(SECPKG_ATTR_STREAM_SIZES);
      X(SECPKG_ATTR_TARGET_INFORMATION);
      case SECPKG_ATTR_SIZES:
      {
          SecPkgContext_Sizes *sizes = (SecPkgContext_Sizes *)buffer;
          ULONG size_max_signature = 37, size_security_trailer = 49;
  #ifdef SONAME_LIBGSSAPI_KRB5
          gss_ctx_id_t ctxt_handle;
  
          if (!(ctxt_handle = ctxthandle_sspi_to_gss( context ))) return SEC_E_INVALID_HANDLE;
          if (is_dce_style_context( ctxt_handle ))
          {
              size_max_signature = 28;
              size_security_trailer = 76;
          }
  #endif
          sizes->cbMaxToken        = KERBEROS_MAX_BUF;
          sizes->cbMaxSignature    = size_max_signature;
          sizes->cbBlockSize       = 1;
          sizes->cbSecurityTrailer = size_security_trailer;
          return SEC_E_OK;
      }
      case SECPKG_ATTR_NEGOTIATION_INFO:
      {
          SecPkgContext_NegotiationInfoW *info = (SecPkgContext_NegotiationInfoW *)buffer;
          if (!(info->PackageInfo = build_package_info( &infoW ))) return SEC_E_INSUFFICIENT_MEMORY;
          info->NegotiationState = SECPKG_NEGOTIATION_COMPLETE;
          return SEC_E_OK;
      }
  #undef X
      default:
          FIXME( "unknown attribute %u\n", attribute );
          break;
      }
  
      return SEC_E_UNSUPPORTED_FUNCTION;
  }
  
  static NTSTATUS NTAPI kerberos_SpInitialize(ULONG_PTR package_id, SECPKG_PARAMETERS *params,
      LSA_SECPKG_FUNCTION_TABLE *lsa_function_table)
  {
      TRACE("%lu,%p,%p\n", package_id, params, lsa_function_table);
  
  #ifdef SONAME_LIBGSSAPI_KRB5
      if (load_gssapi_krb5()) return STATUS_SUCCESS;
  #endif
  
      return STATUS_UNSUCCESSFUL;
  }
  
  static NTSTATUS NTAPI kerberos_SpShutdown(void)
  {
      TRACE("\n");
  
  #ifdef SONAME_LIBGSSAPI_KRB5
      unload_gssapi_krb5();
  #endif
  
      return STATUS_SUCCESS;
  }
  
  static SECPKG_FUNCTION_TABLE kerberos_table =
  {
      kerberos_LsaApInitializePackage, /* InitializePackage */
      NULL, /* LsaLogonUser */
      NULL, /* CallPackage */
      NULL, /* LogonTerminated */
      kerberos_LsaApCallPackageUntrusted, /* CallPackageUntrusted */
      NULL, /* CallPackagePassthrough */
      NULL, /* LogonUserEx */
      NULL, /* LogonUserEx2 */
      kerberos_SpInitialize,
      kerberos_SpShutdown,
      kerberos_SpGetInfo,
      NULL, /* AcceptCredentials */
      kerberos_SpAcquireCredentialsHandle,
      NULL, /* SpQueryCredentialsAttributes */
      kerberos_SpFreeCredentialsHandle,
      NULL, /* SaveCredentials */
      NULL, /* GetCredentials */
      NULL, /* DeleteCredentials */
      kerberos_SpInitLsaModeContext,
      kerberos_SpAcceptLsaModeContext,
      kerberos_SpDeleteContext,
      NULL, /* ApplyControlToken */
      NULL, /* GetUserInfo */
      NULL, /* GetExtendedInformation */
      kerberos_SpQueryContextAttributes,
      NULL, /* SpAddCredentials */
      NULL, /* SetExtendedInformation */
      NULL, /* SetContextAttributes */
      NULL, /* SetCredentialsAttributes */
      NULL, /* ChangeAccountPassword */
      NULL, /* QueryMetaData */
      NULL, /* ExchangeMetaData */
      NULL, /* GetCredUIContext */
      NULL, /* UpdateCredentials */
      NULL, /* ValidateTargetInfo */
      NULL, /* PostLogonUser */
  };
  
  NTSTATUS NTAPI SpLsaModeInitialize(ULONG lsa_version, PULONG package_version,
      PSECPKG_FUNCTION_TABLE *table, PULONG table_count)
  {
      TRACE("%#x,%p,%p,%p\n", lsa_version, package_version, table, table_count);
  
      *package_version = SECPKG_INTERFACE_VERSION;
      *table = &kerberos_table;
      *table_count = 1;
  
      return STATUS_SUCCESS;
  }
  
  static NTSTATUS NTAPI kerberos_SpInstanceInit(ULONG version, SECPKG_DLL_FUNCTIONS *dll_function_table, void **user_functions)
  {
      TRACE("%#x,%p,%p\n", version, dll_function_table, user_functions);
  
      return STATUS_SUCCESS;
  }
  
  static NTSTATUS SEC_ENTRY kerberos_SpMakeSignature( LSA_SEC_HANDLE context, ULONG quality_of_protection,
      SecBufferDesc *message, ULONG message_seq_no )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      OM_uint32 ret, minor_status;
      gss_buffer_desc data_buffer, token_buffer;
      gss_ctx_id_t ctxt_handle;
      int data_idx, token_idx;
  
      TRACE( "(%lx 0x%08x %p %u)\n", context, quality_of_protection, message, message_seq_no );
      if (quality_of_protection) FIXME( "ignoring quality_of_protection 0x%08x\n", quality_of_protection );
      if (message_seq_no) FIXME( "ignoring message_seq_no %u\n", message_seq_no );
  
      if (!context) return SEC_E_INVALID_HANDLE;
      ctxt_handle = ctxthandle_sspi_to_gss( context );
  
      /* FIXME: multiple data buffers, read-only buffers */
      if ((data_idx = get_buffer_index( message, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
      data_buffer.length = message->pBuffers[data_idx].cbBuffer;
      data_buffer.value  = message->pBuffers[data_idx].pvBuffer;
  
      if ((token_idx = get_buffer_index( message, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
      token_buffer.length = 0;
      token_buffer.value  = NULL;
  
      ret = pgss_get_mic( &minor_status, ctxt_handle, GSS_C_QOP_DEFAULT, &data_buffer, &token_buffer );
      TRACE( "gss_get_mic returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE)
      {
          memcpy( message->pBuffers[token_idx].pvBuffer, token_buffer.value, token_buffer.length );
          message->pBuffers[token_idx].cbBuffer = token_buffer.length;
          pgss_release_buffer( &minor_status, &token_buffer );
      }
  
      return status_gss_to_sspi( ret );
  #else
      FIXME( "(%lx 0x%08x %p %u)\n", context, quality_of_protection, message, message_seq_no );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static NTSTATUS NTAPI kerberos_SpVerifySignature( LSA_SEC_HANDLE context, SecBufferDesc *message,
      ULONG message_seq_no, ULONG *quality_of_protection )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      OM_uint32 ret, minor_status;
      gss_buffer_desc data_buffer, token_buffer;
      gss_ctx_id_t ctxt_handle;
      int data_idx, token_idx;
  
      TRACE( "(%lx %p %u %p)\n", context, message, message_seq_no, quality_of_protection );
      if (message_seq_no) FIXME( "ignoring message_seq_no %u\n", message_seq_no );
  
      if (!context) return SEC_E_INVALID_HANDLE;
      ctxt_handle = ctxthandle_sspi_to_gss( context );
  
      if ((data_idx = get_buffer_index( message, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
      data_buffer.length = message->pBuffers[data_idx].cbBuffer;
      data_buffer.value  = message->pBuffers[data_idx].pvBuffer;
  
      if ((token_idx = get_buffer_index( message, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
      token_buffer.length = message->pBuffers[token_idx].cbBuffer;
      token_buffer.value  = message->pBuffers[token_idx].pvBuffer;
  
      ret = pgss_verify_mic( &minor_status, ctxt_handle, &data_buffer, &token_buffer, NULL );
      TRACE( "gss_verify_mic returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE && quality_of_protection) *quality_of_protection = 0;
  
      return status_gss_to_sspi( ret );
  #else
      FIXME( "(%lx %p %u %p)\n", context, message, message_seq_no, quality_of_protection );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  #ifdef SONAME_LIBGSSAPI_KRB5
  static NTSTATUS seal_message_iov( gss_ctx_id_t ctxt_handle, SecBufferDesc *message, ULONG quality_of_protection )
  {
      gss_iov_buffer_desc iov[4];
      OM_uint32 ret, minor_status;
      int token_idx, data_idx, conf_flag, conf_state;
  
      if (!quality_of_protection)
          conf_flag = 1; /* confidentiality + integrity */
      else if (quality_of_protection == SECQOP_WRAP_NO_ENCRYPT)
          conf_flag = 0; /* only integrity */
      else
      {
          FIXME( "QOP %08x not supported\n", quality_of_protection );
          return SEC_E_UNSUPPORTED_FUNCTION;
      }
  
      /* FIXME: multiple data buffers, read-only buffers */
      if ((data_idx = get_buffer_index( message, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
      if ((token_idx = get_buffer_index( message, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
  
      iov[0].type          = GSS_IOV_BUFFER_TYPE_SIGN_ONLY | GSS_IOV_BUFFER_FLAG_ALLOCATE;
      iov[0].buffer.length = 0;
      iov[0].buffer.value  = NULL;
  
      iov[1].type          = GSS_IOV_BUFFER_TYPE_DATA;
      iov[1].buffer.length = message->pBuffers[data_idx].cbBuffer;
      iov[1].buffer.value  = message->pBuffers[data_idx].pvBuffer;
  
      iov[2].type          = GSS_IOV_BUFFER_TYPE_SIGN_ONLY | GSS_IOV_BUFFER_FLAG_ALLOCATE;
      iov[2].buffer.length = 0;
      iov[2].buffer.value  = NULL;
  
      iov[3].type          = GSS_IOV_BUFFER_TYPE_HEADER | GSS_IOV_BUFFER_FLAG_ALLOCATE;
      iov[3].buffer.length = 0;
      iov[3].buffer.value  = NULL;
  
      ret = pgss_wrap_iov( &minor_status, ctxt_handle, conf_flag, GSS_C_QOP_DEFAULT, &conf_state, iov, 4 );
      TRACE( "gss_wrap_iov returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE)
      {
          memcpy( message->pBuffers[token_idx].pvBuffer, iov[3].buffer.value, iov[3].buffer.length );
          message->pBuffers[token_idx].cbBuffer = iov[3].buffer.length;
          pgss_release_iov_buffer( &minor_status, iov, 4 );
      }
  
      return status_gss_to_sspi( ret );
  }
  
  static NTSTATUS seal_message( gss_ctx_id_t ctxt_handle, SecBufferDesc *message, ULONG quality_of_protection )
  {
      gss_buffer_desc input, output;
      OM_uint32 ret, minor_status;
      int token_idx, data_idx, conf_flag, conf_state;
  
      if (!quality_of_protection)
          conf_flag = 1; /* confidentiality + integrity */
      else if (quality_of_protection == SECQOP_WRAP_NO_ENCRYPT)
          conf_flag = 0; /* only integrity */
      else
      {
          FIXME( "QOP %08x not supported\n", quality_of_protection );
          return SEC_E_UNSUPPORTED_FUNCTION;
      }
  
      /* FIXME: multiple data buffers, read-only buffers */
      if ((data_idx = get_buffer_index( message, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
      if ((token_idx = get_buffer_index( message, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
  
      input.length = message->pBuffers[data_idx].cbBuffer;
      input.value  = message->pBuffers[data_idx].pvBuffer;
  
      ret = pgss_wrap( &minor_status, ctxt_handle, conf_flag, GSS_C_QOP_DEFAULT, &input, &conf_state, &output );
      TRACE( "gss_wrap returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE)
      {
          DWORD len_data = message->pBuffers[data_idx].cbBuffer, len_token = message->pBuffers[token_idx].cbBuffer;
          if (len_token < output.length - len_data)
          {
              TRACE( "buffer too small %lu > %u\n", (SIZE_T)output.length - len_data, len_token );
              pgss_release_buffer( &minor_status, &output );
              return SEC_E_BUFFER_TOO_SMALL;
          }
          memcpy( message->pBuffers[data_idx].pvBuffer, output.value, len_data );
          memcpy( message->pBuffers[token_idx].pvBuffer, (char *)output.value + len_data, output.length - len_data );
          message->pBuffers[token_idx].cbBuffer = output.length - len_data;
          pgss_release_buffer( &minor_status, &output );
      }
  
      return status_gss_to_sspi( ret );
  }
  #endif
  
  static NTSTATUS NTAPI kerberos_SpSealMessage( LSA_SEC_HANDLE context, ULONG quality_of_protection,
      SecBufferDesc *message, ULONG message_seq_no )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      gss_ctx_id_t ctxt_handle;
  
      TRACE( "(%lx 0x%08x %p %u)\n", context, quality_of_protection, message, message_seq_no );
      if (message_seq_no) FIXME( "ignoring message_seq_no %u\n", message_seq_no );
  
      if (!context) return SEC_E_INVALID_HANDLE;
      ctxt_handle = ctxthandle_sspi_to_gss( context );
  
      if (is_dce_style_context( ctxt_handle )) return seal_message_iov( ctxt_handle, message, quality_of_protection );
      return seal_message( ctxt_handle, message, quality_of_protection );
  #else
      FIXME( "(%lx 0x%08x %p %u)\n", context, quality_of_protection, message, message_seq_no );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  #ifdef SONAME_LIBGSSAPI_KRB5
  static NTSTATUS unseal_message_iov( gss_ctx_id_t ctxt_handle, SecBufferDesc *message, ULONG *quality_of_protection )
  {
      gss_iov_buffer_desc iov[4];
      OM_uint32 ret, minor_status;
      int token_idx, data_idx, conf_state;
  
      if ((data_idx = get_buffer_index( message, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
      if ((token_idx = get_buffer_index( message, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
  
      iov[0].type          = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;
      iov[0].buffer.length = 0;
      iov[0].buffer.value  = NULL;
  
      iov[1].type          = GSS_IOV_BUFFER_TYPE_DATA;
      iov[1].buffer.length = message->pBuffers[data_idx].cbBuffer;
      iov[1].buffer.value  = message->pBuffers[data_idx].pvBuffer;
  
      iov[2].type          = GSS_IOV_BUFFER_TYPE_SIGN_ONLY;
      iov[2].buffer.length = 0;
      iov[2].buffer.value  = NULL;
  
      iov[3].type          = GSS_IOV_BUFFER_TYPE_HEADER;
      iov[3].buffer.length = message->pBuffers[token_idx].cbBuffer;
      iov[3].buffer.value  = message->pBuffers[token_idx].pvBuffer;
  
      ret = pgss_unwrap_iov( &minor_status, ctxt_handle, &conf_state, NULL, iov, 4 );
      TRACE( "gss_unwrap_iov returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE && quality_of_protection)
      {
          *quality_of_protection = (conf_state ? 0 : SECQOP_WRAP_NO_ENCRYPT);
      }
      return status_gss_to_sspi( ret );
  }
  
  static NTSTATUS unseal_message( gss_ctx_id_t ctxt_handle, SecBufferDesc *message, ULONG *quality_of_protection )
  {
      gss_buffer_desc input, output;
      OM_uint32 ret, minor_status;
      int token_idx, data_idx, conf_state;
      DWORD len_data, len_token;
  
      if ((data_idx = get_buffer_index( message, SECBUFFER_DATA )) == -1) return SEC_E_INVALID_TOKEN;
      if ((token_idx = get_buffer_index( message, SECBUFFER_TOKEN )) == -1) return SEC_E_INVALID_TOKEN;
  
      len_data = message->pBuffers[data_idx].cbBuffer;
      len_token = message->pBuffers[token_idx].cbBuffer;
  
      input.length = len_data + len_token;
      if (!(input.value = heap_alloc( input.length ))) return SEC_E_INSUFFICIENT_MEMORY;
      memcpy( input.value, message->pBuffers[data_idx].pvBuffer, len_data );
      memcpy( (char *)input.value + len_data, message->pBuffers[token_idx].pvBuffer, len_token );
  
      ret = pgss_unwrap( &minor_status, ctxt_handle, &input, &output, &conf_state, NULL );
      heap_free( input.value );
      TRACE( "gss_unwrap returned %08x minor status %08x\n", ret, minor_status );
      if (GSS_ERROR(ret)) trace_gss_status( ret, minor_status );
      if (ret == GSS_S_COMPLETE)
      {
          if (quality_of_protection) *quality_of_protection = (conf_state ? 0 : SECQOP_WRAP_NO_ENCRYPT);
          memcpy( message->pBuffers[data_idx].pvBuffer, output.value, len_data );
          pgss_release_buffer( &minor_status, &output );
      }
  
      return status_gss_to_sspi( ret );
  }
  #endif
  
  static NTSTATUS NTAPI kerberos_SpUnsealMessage( LSA_SEC_HANDLE context, SecBufferDesc *message,
      ULONG message_seq_no, ULONG *quality_of_protection )
  {
  #ifdef SONAME_LIBGSSAPI_KRB5
      gss_ctx_id_t ctxt_handle;
  
      TRACE( "(%lx %p %u %p)\n", context, message, message_seq_no, quality_of_protection );
      if (message_seq_no) FIXME( "ignoring message_seq_no %u\n", message_seq_no );
  
      if (!context) return SEC_E_INVALID_HANDLE;
      ctxt_handle = ctxthandle_sspi_to_gss( context );
  
      if (is_dce_style_context( ctxt_handle )) return unseal_message_iov( ctxt_handle, message, quality_of_protection );
      return unseal_message( ctxt_handle, message, quality_of_protection );
  #else
      FIXME( "(%lx %p %u %p)\n", context, message, message_seq_no, quality_of_protection );
      return SEC_E_UNSUPPORTED_FUNCTION;
  #endif
  }
  
  static SECPKG_USER_FUNCTION_TABLE kerberos_user_table =
  {
      kerberos_SpInstanceInit,
      NULL, /* SpInitUserModeContext */
      kerberos_SpMakeSignature,
      kerberos_SpVerifySignature,
      kerberos_SpSealMessage,
      kerberos_SpUnsealMessage,
      NULL, /* SpGetContextToken */
      NULL, /* SpQueryContextAttributes */
      NULL, /* SpCompleteAuthToken */
      NULL, /* SpDeleteContext */
      NULL, /* SpFormatCredentialsFn */
      NULL, /* SpMarshallSupplementalCreds */
      NULL, /* SpExportSecurityContext */
      NULL  /* SpImportSecurityContext */
  };
  
  NTSTATUS NTAPI SpUserModeInitialize(ULONG lsa_version, PULONG package_version,
      PSECPKG_USER_FUNCTION_TABLE *table, PULONG table_count)
  {
      TRACE("%#x,%p,%p,%p\n", lsa_version, package_version, table, table_count);
  
      *package_version = SECPKG_INTERFACE_VERSION;
      *table = &kerberos_user_table;
      *table_count = 1;
  
      return STATUS_SUCCESS;
  }
  