git.oblomov.eu Git - wine/blob - dlls/rpcrt4/rpc_message.c

   1 /*
   2  * RPC messages
   3  *
   4  * Copyright 2001-2002 Ove Kåven, TransGaming Technologies
   5  * Copyright 2004 Filip Navara
   6  * Copyright 2006 CodeWeavers
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "winerror.h"
  30 #include "winreg.h"
  31
  32 #include "rpc.h"
  33 #include "rpcndr.h"
  34 #include "rpcdcep.h"
  35
  36 #include "wine/debug.h"
  37
  38 #include "rpc_binding.h"
  39 #include "rpc_misc.h"
  40 #include "rpc_defs.h"
  41 #include "rpc_message.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(rpc);
  44
  45 /* note: the DCE/RPC spec says the alignment amount should be 4, but
  46  * MS/RPC servers seem to always use 16 */
  47 #define AUTH_ALIGNMENT 16
  48
  49 /* gets the amount needed to round a value up to the specified alignment */
  50 #define ROUND_UP_AMOUNT(value, alignment) \
  51     (((alignment) - (((value) % (alignment)))) % (alignment))
  52 #define ROUND_UP(value, alignment) (((value) + ((alignment) - 1)) & ~((alignment)-1))
  53
  54 enum secure_packet_direction
  55 {
  56   SECURE_PACKET_SEND,
  57   SECURE_PACKET_RECEIVE
  58 };
  59
  60 static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg);
  61
  62 static DWORD RPCRT4_GetHeaderSize(RpcPktHdr *Header)
  63 {
  64   static const DWORD header_sizes[] = {
  65     sizeof(Header->request), 0, sizeof(Header->response),
  66     sizeof(Header->fault), 0, 0, 0, 0, 0, 0, 0, sizeof(Header->bind),
  67     sizeof(Header->bind_ack), sizeof(Header->bind_nack),
  68     0, 0, 0, 0, 0
  69   };
  70   ULONG ret = 0;
  71
  72   if (Header->common.ptype < sizeof(header_sizes) / sizeof(header_sizes[0])) {
  73     ret = header_sizes[Header->common.ptype];
  74     if (ret == 0)
  75       FIXME("unhandled packet type\n");
  76     if (Header->common.flags & RPC_FLG_OBJECT_UUID)
  77       ret += sizeof(UUID);
  78   } else {
  79     TRACE("invalid packet type\n");
  80   }
  81
  82   return ret;
  83 }
  84
  85 static int packet_has_body(RpcPktHdr *Header)
  86 {
  87     return (Header->common.ptype == PKT_FAULT) ||
  88            (Header->common.ptype == PKT_REQUEST) ||
  89            (Header->common.ptype == PKT_RESPONSE);
  90 }
  91
  92 static int packet_has_auth_verifier(RpcPktHdr *Header)
  93 {
  94     return !(Header->common.ptype == PKT_BIND_NACK) &&
  95            !(Header->common.ptype == PKT_SHUTDOWN);
  96 }
  97
  98 static VOID RPCRT4_BuildCommonHeader(RpcPktHdr *Header, unsigned char PacketType,
  99                               unsigned long DataRepresentation)
 100 {
 101   Header->common.rpc_ver = RPC_VER_MAJOR;
 102   Header->common.rpc_ver_minor = RPC_VER_MINOR;
 103   Header->common.ptype = PacketType;
 104   Header->common.drep[0] = LOBYTE(LOWORD(DataRepresentation));
 105   Header->common.drep[1] = HIBYTE(LOWORD(DataRepresentation));
 106   Header->common.drep[2] = LOBYTE(HIWORD(DataRepresentation));
 107   Header->common.drep[3] = HIBYTE(HIWORD(DataRepresentation));
 108   Header->common.auth_len = 0;
 109   Header->common.call_id = 1;
 110   Header->common.flags = 0;
 111   /* Flags and fragment length are computed in RPCRT4_Send. */
 112 }
 113
 114 static RpcPktHdr *RPCRT4_BuildRequestHeader(unsigned long DataRepresentation,
 115                                      unsigned long BufferLength,
 116                                      unsigned short ProcNum,
 117                                      UUID *ObjectUuid)
 118 {
 119   RpcPktHdr *header;
 120   BOOL has_object;
 121   RPC_STATUS status;
 122
 123   has_object = (ObjectUuid != NULL && !UuidIsNil(ObjectUuid, &status));
 124   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 125                      sizeof(header->request) + (has_object ? sizeof(UUID) : 0));
 126   if (header == NULL) {
 127     return NULL;
 128   }
 129
 130   RPCRT4_BuildCommonHeader(header, PKT_REQUEST, DataRepresentation);
 131   header->common.frag_len = sizeof(header->request);
 132   header->request.alloc_hint = BufferLength;
 133   header->request.context_id = 0;
 134   header->request.opnum = ProcNum;
 135   if (has_object) {
 136     header->common.flags |= RPC_FLG_OBJECT_UUID;
 137     header->common.frag_len += sizeof(UUID);
 138     memcpy(&header->request + 1, ObjectUuid, sizeof(UUID));
 139   }
 140
 141   return header;
 142 }
 143
 144 static RpcPktHdr *RPCRT4_BuildResponseHeader(unsigned long DataRepresentation,
 145                                       unsigned long BufferLength)
 146 {
 147   RpcPktHdr *header;
 148
 149   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->response));
 150   if (header == NULL) {
 151     return NULL;
 152   }
 153
 154   RPCRT4_BuildCommonHeader(header, PKT_RESPONSE, DataRepresentation);
 155   header->common.frag_len = sizeof(header->response);
 156   header->response.alloc_hint = BufferLength;
 157
 158   return header;
 159 }
 160
 161 RpcPktHdr *RPCRT4_BuildFaultHeader(unsigned long DataRepresentation,
 162                                    RPC_STATUS Status)
 163 {
 164   RpcPktHdr *header;
 165
 166   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->fault));
 167   if (header == NULL) {
 168     return NULL;
 169   }
 170
 171   RPCRT4_BuildCommonHeader(header, PKT_FAULT, DataRepresentation);
 172   header->common.frag_len = sizeof(header->fault);
 173   header->fault.status = Status;
 174
 175   return header;
 176 }
 177
 178 RpcPktHdr *RPCRT4_BuildBindHeader(unsigned long DataRepresentation,
 179                                   unsigned short MaxTransmissionSize,
 180                                   unsigned short MaxReceiveSize,
 181                                   RPC_SYNTAX_IDENTIFIER *AbstractId,
 182                                   RPC_SYNTAX_IDENTIFIER *TransferId)
 183 {
 184   RpcPktHdr *header;
 185
 186   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind));
 187   if (header == NULL) {
 188     return NULL;
 189   }
 190
 191   RPCRT4_BuildCommonHeader(header, PKT_BIND, DataRepresentation);
 192   header->common.frag_len = sizeof(header->bind);
 193   header->bind.max_tsize = MaxTransmissionSize;
 194   header->bind.max_rsize = MaxReceiveSize;
 195   header->bind.num_elements = 1;
 196   header->bind.num_syntaxes = 1;
 197   memcpy(&header->bind.abstract, AbstractId, sizeof(RPC_SYNTAX_IDENTIFIER));
 198   memcpy(&header->bind.transfer, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
 199
 200   return header;
 201 }
 202
 203 RpcPktHdr *RPCRT4_BuildAuthHeader(unsigned long DataRepresentation)
 204 {
 205   RpcPktHdr *header;
 206
 207   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 208                      sizeof(header->common) + 12);
 209   if (header == NULL)
 210     return NULL;
 211
 212   RPCRT4_BuildCommonHeader(header, PKT_AUTH3, DataRepresentation);
 213   header->common.frag_len = 0x14;
 214   header->common.auth_len = 0;
 215
 216   return header;
 217 }
 218
 219 RpcPktHdr *RPCRT4_BuildBindNackHeader(unsigned long DataRepresentation,
 220                                       unsigned char RpcVersion,
 221                                       unsigned char RpcVersionMinor)
 222 {
 223   RpcPktHdr *header;
 224
 225   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind_nack));
 226   if (header == NULL) {
 227     return NULL;
 228   }
 229
 230   RPCRT4_BuildCommonHeader(header, PKT_BIND_NACK, DataRepresentation);
 231   header->common.frag_len = sizeof(header->bind_nack);
 232   header->bind_nack.protocols_count = 1;
 233   header->bind_nack.protocols[0].rpc_ver = RpcVersion;
 234   header->bind_nack.protocols[0].rpc_ver_minor = RpcVersionMinor;
 235
 236   return header;
 237 }
 238
 239 RpcPktHdr *RPCRT4_BuildBindAckHeader(unsigned long DataRepresentation,
 240                                      unsigned short MaxTransmissionSize,
 241                                      unsigned short MaxReceiveSize,
 242                                      LPSTR ServerAddress,
 243                                      unsigned long Result,
 244                                      unsigned long Reason,
 245                                      RPC_SYNTAX_IDENTIFIER *TransferId)
 246 {
 247   RpcPktHdr *header;
 248   unsigned long header_size;
 249   RpcAddressString *server_address;
 250   RpcResults *results;
 251   RPC_SYNTAX_IDENTIFIER *transfer_id;
 252
 253   header_size = sizeof(header->bind_ack) +
 254                 ROUND_UP(FIELD_OFFSET(RpcAddressString, string[strlen(ServerAddress) + 1]), 4) +
 255                 sizeof(RpcResults) +
 256                 sizeof(RPC_SYNTAX_IDENTIFIER);
 257
 258   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, header_size);
 259   if (header == NULL) {
 260     return NULL;
 261   }
 262
 263   RPCRT4_BuildCommonHeader(header, PKT_BIND_ACK, DataRepresentation);
 264   header->common.frag_len = header_size;
 265   header->bind_ack.max_tsize = MaxTransmissionSize;
 266   header->bind_ack.max_rsize = MaxReceiveSize;
 267   server_address = (RpcAddressString*)(&header->bind_ack + 1);
 268   server_address->length = strlen(ServerAddress) + 1;
 269   strcpy(server_address->string, ServerAddress);
 270   /* results is 4-byte aligned */
 271   results = (RpcResults*)((ULONG_PTR)server_address + ROUND_UP(FIELD_OFFSET(RpcAddressString, string[server_address->length]), 4));
 272   results->num_results = 1;
 273   results->results[0].result = Result;
 274   results->results[0].reason = Reason;
 275   transfer_id = (RPC_SYNTAX_IDENTIFIER*)(results + 1);
 276   memcpy(transfer_id, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
 277
 278   return header;
 279 }
 280
 281 VOID RPCRT4_FreeHeader(RpcPktHdr *Header)
 282 {
 283   HeapFree(GetProcessHeap(), 0, Header);
 284 }
 285
 286 static RPC_STATUS RPCRT4_SecurePacket(RpcConnection *Connection,
 287     enum secure_packet_direction dir,
 288     RpcPktHdr *hdr, unsigned int hdr_size,
 289     unsigned char *stub_data, unsigned int stub_data_size,
 290     RpcAuthVerifier *auth_hdr,
 291     unsigned char *auth_value, unsigned int auth_value_size)
 292 {
 293     SecBufferDesc message;
 294     SecBuffer buffers[4];
 295     SECURITY_STATUS sec_status;
 296
 297     message.ulVersion = SECBUFFER_VERSION;
 298     message.cBuffers = sizeof(buffers)/sizeof(buffers[0]);
 299     message.pBuffers = buffers;
 300
 301     buffers[0].cbBuffer = hdr_size;
 302     buffers[0].BufferType = SECBUFFER_DATA|SECBUFFER_READONLY_WITH_CHECKSUM;
 303     buffers[0].pvBuffer = hdr;
 304     buffers[1].cbBuffer = stub_data_size;
 305     buffers[1].BufferType = SECBUFFER_DATA;
 306     buffers[1].pvBuffer = stub_data;
 307     buffers[2].cbBuffer = sizeof(*auth_hdr);
 308     buffers[2].BufferType = SECBUFFER_DATA|SECBUFFER_READONLY_WITH_CHECKSUM;
 309     buffers[2].pvBuffer = auth_hdr;
 310     buffers[3].cbBuffer = auth_value_size;
 311     buffers[3].BufferType = SECBUFFER_TOKEN;
 312     buffers[3].pvBuffer = auth_value;
 313
 314     if (dir == SECURE_PACKET_SEND)
 315     {
 316         if ((auth_hdr->auth_level == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(hdr))
 317         {
 318             sec_status = EncryptMessage(&Connection->ctx, 0, &message, 0 /* FIXME */);
 319             if (sec_status != SEC_E_OK)
 320             {
 321                 ERR("EncryptMessage failed with 0x%08x\n", sec_status);
 322                 return RPC_S_SEC_PKG_ERROR;
 323             }
 324         }
 325         else if (auth_hdr->auth_level != RPC_C_AUTHN_LEVEL_NONE)
 326         {
 327             sec_status = MakeSignature(&Connection->ctx, 0, &message, 0 /* FIXME */);
 328             if (sec_status != SEC_E_OK)
 329             {
 330                 ERR("MakeSignature failed with 0x%08x\n", sec_status);
 331                 return RPC_S_SEC_PKG_ERROR;
 332             }
 333         }
 334     }
 335     else if (dir == SECURE_PACKET_RECEIVE)
 336     {
 337         if ((auth_hdr->auth_level == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(hdr))
 338         {
 339             sec_status = DecryptMessage(&Connection->ctx, &message, 0 /* FIXME */, 0);
 340             if (sec_status != SEC_E_OK)
 341             {
 342                 ERR("EncryptMessage failed with 0x%08x\n", sec_status);
 343                 return RPC_S_SEC_PKG_ERROR;
 344             }
 345         }
 346         else if (auth_hdr->auth_level != RPC_C_AUTHN_LEVEL_NONE)
 347         {
 348             sec_status = VerifySignature(&Connection->ctx, &message, 0 /* FIXME */, NULL);
 349             if (sec_status != SEC_E_OK)
 350             {
 351                 ERR("VerifySignature failed with 0x%08x\n", sec_status);
 352                 return RPC_S_SEC_PKG_ERROR;
 353             }
 354         }
 355     }
 356
 357     return RPC_S_OK;
 358 }
 359
 360 /***********************************************************************
 361  *           RPCRT4_SendAuth (internal)
 362  *
 363  * Transmit a packet with authorization data over connection in acceptable fragments.
 364  */
 365 static RPC_STATUS RPCRT4_SendAuth(RpcConnection *Connection, RpcPktHdr *Header,
 366                                   void *Buffer, unsigned int BufferLength,
 367                                   void *Auth, unsigned int AuthLength)
 368 {
 369   PUCHAR buffer_pos;
 370   DWORD hdr_size;
 371   LONG count;
 372   unsigned char *pkt;
 373   LONG alen;
 374   RPC_STATUS status;
 375
 376   buffer_pos = Buffer;
 377   /* The packet building functions save the packet header size, so we can use it. */
 378   hdr_size = Header->common.frag_len;
 379   if (AuthLength)
 380     Header->common.auth_len = AuthLength;
 381   else if (Connection->AuthInfo && packet_has_auth_verifier(Header))
 382     Header->common.auth_len = 16 /* FIXME */;
 383   else
 384     Header->common.auth_len = 0;
 385   Header->common.flags |= RPC_FLG_FIRST;
 386   Header->common.flags &= ~RPC_FLG_LAST;
 387
 388   alen = RPC_AUTH_VERIFIER_LEN(&Header->common);
 389
 390   while (!(Header->common.flags & RPC_FLG_LAST)) {
 391     unsigned char auth_pad_len = Header->common.auth_len ? ROUND_UP_AMOUNT(BufferLength, AUTH_ALIGNMENT) : 0;
 392     unsigned int pkt_size = BufferLength + hdr_size + alen + auth_pad_len;
 393
 394     /* decide if we need to split the packet into fragments */
 395    if (pkt_size <= Connection->MaxTransmissionSize) {
 396      Header->common.flags |= RPC_FLG_LAST;
 397      Header->common.frag_len = pkt_size;
 398     } else {
 399       auth_pad_len = 0;
 400       /* make sure packet payload will be a multiple of 16 */
 401       Header->common.frag_len =
 402         ((Connection->MaxTransmissionSize - hdr_size - alen) & ~(AUTH_ALIGNMENT-1)) +
 403         hdr_size + alen;
 404     }
 405
 406     pkt = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, Header->common.frag_len);
 407
 408     memcpy(pkt, Header, hdr_size);
 409
 410     /* fragment consisted of header only and is the last one */
 411     if (hdr_size == Header->common.frag_len)
 412       goto write;
 413
 414     memcpy(pkt + hdr_size, buffer_pos, Header->common.frag_len - hdr_size - auth_pad_len - alen);
 415
 416     /* add the authorization info */
 417     if (Connection->AuthInfo && packet_has_auth_verifier(Header))
 418     {
 419       RpcAuthVerifier *auth_hdr = (RpcAuthVerifier *)&pkt[Header->common.frag_len - alen];
 420
 421       auth_hdr->auth_type = Connection->AuthInfo->AuthnSvc;
 422       auth_hdr->auth_level = Connection->AuthInfo->AuthnLevel;
 423       auth_hdr->auth_pad_length = auth_pad_len;
 424       auth_hdr->auth_reserved = 0;
 425       /* a unique number... */
 426       auth_hdr->auth_context_id = (unsigned long)Connection;
 427
 428       if (AuthLength)
 429         memcpy(auth_hdr + 1, Auth, AuthLength);
 430       else
 431       {
 432         status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_SEND,
 433             (RpcPktHdr *)pkt, hdr_size,
 434             pkt + hdr_size, Header->common.frag_len - hdr_size - alen,
 435             auth_hdr,
 436             (unsigned char *)(auth_hdr + 1), Header->common.auth_len);
 437         if (status != RPC_S_OK)
 438         {
 439           HeapFree(GetProcessHeap(), 0, pkt);
 440           return status;
 441         }
 442       }
 443     }
 444
 445 write:
 446     count = rpcrt4_conn_write(Connection, pkt, Header->common.frag_len);
 447     HeapFree(GetProcessHeap(), 0, pkt);
 448     if (count<0) {
 449       WARN("rpcrt4_conn_write failed (auth)\n");
 450       return RPC_S_PROTOCOL_ERROR;
 451     }
 452
 453     buffer_pos += Header->common.frag_len - hdr_size - alen - auth_pad_len;
 454     BufferLength -= Header->common.frag_len - hdr_size - alen - auth_pad_len;
 455     Header->common.flags &= ~RPC_FLG_FIRST;
 456   }
 457
 458   return RPC_S_OK;
 459 }
 460
 461 /***********************************************************************
 462  *           RPCRT4_AuthNegotiate (internal)
 463  */
 464 static void RPCRT4_AuthNegotiate(RpcConnection *conn, SecBuffer *out)
 465 {
 466   SECURITY_STATUS r;
 467   SecBufferDesc out_desc;
 468   unsigned char *buffer;
 469   ULONG context_req = ISC_REQ_CONNECTION | ISC_REQ_USE_DCE_STYLE |
 470                       ISC_REQ_MUTUAL_AUTH | ISC_REQ_DELEGATE;
 471
 472   if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_INTEGRITY)
 473     context_req |= ISC_REQ_INTEGRITY;
 474   else if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
 475     context_req |= ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY;
 476
 477   buffer = HeapAlloc(GetProcessHeap(), 0, 0x100);
 478
 479   out->BufferType = SECBUFFER_TOKEN;
 480   out->cbBuffer = 0x100;
 481   out->pvBuffer = buffer;
 482
 483   out_desc.ulVersion = 0;
 484   out_desc.cBuffers = 1;
 485   out_desc.pBuffers = out;
 486
 487   conn->attr = 0;
 488   conn->ctx.dwLower = 0;
 489   conn->ctx.dwUpper = 0;
 490
 491   r = InitializeSecurityContextA(&conn->AuthInfo->cred, NULL, NULL,
 492         context_req, 0, SECURITY_NETWORK_DREP,
 493         NULL, 0, &conn->ctx, &out_desc, &conn->attr, &conn->exp);
 494
 495   TRACE("r = %08x cbBuffer = %ld attr = %08x\n", r, out->cbBuffer, conn->attr);
 496 }
 497
 498 /***********************************************************************
 499  *           RPCRT4_AuthorizeBinding (internal)
 500  */
 501 static RPC_STATUS RPCRT_AuthorizeConnection(RpcConnection* conn,
 502                                             BYTE *challenge, ULONG count)
 503 {
 504   SecBufferDesc inp_desc, out_desc;
 505   SecBuffer inp, out;
 506   SECURITY_STATUS r;
 507   unsigned char buffer[0x100];
 508   RpcPktHdr *resp_hdr;
 509   RPC_STATUS status;
 510   ULONG context_req = ISC_REQ_CONNECTION | ISC_REQ_USE_DCE_STYLE |
 511                       ISC_REQ_MUTUAL_AUTH | ISC_REQ_DELEGATE;
 512
 513   TRACE("challenge %s, %d bytes\n", challenge, count);
 514
 515   if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_INTEGRITY)
 516     context_req |= ISC_REQ_INTEGRITY;
 517   else if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
 518     context_req |= ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY;
 519
 520   out.BufferType = SECBUFFER_TOKEN;
 521   out.cbBuffer = sizeof buffer;
 522   out.pvBuffer = buffer;
 523
 524   out_desc.ulVersion = 0;
 525   out_desc.cBuffers = 1;
 526   out_desc.pBuffers = &out;
 527
 528   inp.BufferType = SECBUFFER_TOKEN;
 529   inp.pvBuffer = challenge;
 530   inp.cbBuffer = count;
 531
 532   inp_desc.cBuffers = 1;
 533   inp_desc.pBuffers = &inp;
 534   inp_desc.ulVersion = 0;
 535
 536   r = InitializeSecurityContextA(&conn->AuthInfo->cred, &conn->ctx, NULL,
 537         context_req, 0, SECURITY_NETWORK_DREP,
 538         &inp_desc, 0, &conn->ctx, &out_desc, &conn->attr, &conn->exp);
 539   if (r)
 540   {
 541     WARN("InitializeSecurityContext failed with error 0x%08x\n", r);
 542     return ERROR_ACCESS_DENIED;
 543   }
 544
 545   resp_hdr = RPCRT4_BuildAuthHeader(NDR_LOCAL_DATA_REPRESENTATION);
 546   if (!resp_hdr)
 547     return E_OUTOFMEMORY;
 548
 549   status = RPCRT4_SendAuth(conn, resp_hdr, NULL, 0, out.pvBuffer, out.cbBuffer);
 550
 551   RPCRT4_FreeHeader(resp_hdr);
 552
 553   return status;
 554 }
 555
 556 /***********************************************************************
 557  *           RPCRT4_Send (internal)
 558  *
 559  * Transmit a packet over connection in acceptable fragments.
 560  */
 561 RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
 562                        void *Buffer, unsigned int BufferLength)
 563 {
 564   RPC_STATUS r;
 565   SecBuffer out;
 566
 567   if (!Connection->AuthInfo ||
 568       Connection->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_DEFAULT ||
 569       Connection->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_NONE ||
 570       (Connection->ctx.dwUpper || Connection->ctx.dwLower))
 571   {
 572     return RPCRT4_SendAuth(Connection, Header, Buffer, BufferLength, NULL, 0);
 573   }
 574
 575   out.BufferType = SECBUFFER_TOKEN;
 576   out.cbBuffer = 0;
 577   out.pvBuffer = NULL;
 578
 579   /* tack on a negotiate packet */
 580   RPCRT4_AuthNegotiate(Connection, &out);
 581   r = RPCRT4_SendAuth(Connection, Header, Buffer, BufferLength, out.pvBuffer, out.cbBuffer);
 582   HeapFree(GetProcessHeap(), 0, out.pvBuffer);
 583
 584   return r;
 585 }
 586
 587 /***********************************************************************
 588  *           RPCRT4_Receive (internal)
 589  *
 590  * Receive a packet from connection and merge the fragments.
 591  */
 592 RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
 593                           PRPC_MESSAGE pMsg)
 594 {
 595   RPC_STATUS status;
 596   DWORD hdr_length;
 597   LONG dwRead;
 598   unsigned short first_flag;
 599   unsigned long data_length;
 600   unsigned long buffer_length;
 601   unsigned long auth_length;
 602   unsigned char *auth_data = NULL;
 603   RpcPktCommonHdr common_hdr;
 604
 605   *Header = NULL;
 606
 607   TRACE("(%p, %p, %p)\n", Connection, Header, pMsg);
 608
 609   /* read packet common header */
 610   dwRead = rpcrt4_conn_read(Connection, &common_hdr, sizeof(common_hdr));
 611   if (dwRead != sizeof(common_hdr)) {
 612     WARN("Short read of header, %d bytes\n", dwRead);
 613     status = RPC_S_PROTOCOL_ERROR;
 614     goto fail;
 615   }
 616
 617   /* verify if the header really makes sense */
 618   if (common_hdr.rpc_ver != RPC_VER_MAJOR ||
 619       common_hdr.rpc_ver_minor != RPC_VER_MINOR) {
 620     WARN("unhandled packet version\n");
 621     status = RPC_S_PROTOCOL_ERROR;
 622     goto fail;
 623   }
 624
 625   hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
 626   if (hdr_length == 0) {
 627     WARN("header length == 0\n");
 628     status = RPC_S_PROTOCOL_ERROR;
 629     goto fail;
 630   }
 631
 632   *Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
 633   memcpy(*Header, &common_hdr, sizeof(common_hdr));
 634
 635   /* read the rest of packet header */
 636   dwRead = rpcrt4_conn_read(Connection, &(*Header)->common + 1, hdr_length - sizeof(common_hdr));
 637   if (dwRead != hdr_length - sizeof(common_hdr)) {
 638     WARN("bad header length, %d bytes, hdr_length %d\n", dwRead, hdr_length);
 639     status = RPC_S_PROTOCOL_ERROR;
 640     goto fail;
 641   }
 642
 643   /* read packet body */
 644   switch (common_hdr.ptype) {
 645   case PKT_RESPONSE:
 646     pMsg->BufferLength = (*Header)->response.alloc_hint;
 647     break;
 648   case PKT_REQUEST:
 649     pMsg->BufferLength = (*Header)->request.alloc_hint;
 650     break;
 651   default:
 652     pMsg->BufferLength = common_hdr.frag_len - hdr_length - RPC_AUTH_VERIFIER_LEN(&common_hdr);
 653   }
 654
 655   TRACE("buffer length = %u\n", pMsg->BufferLength);
 656
 657   status = I_RpcGetBuffer(pMsg);
 658   if (status != RPC_S_OK) goto fail;
 659
 660   first_flag = RPC_FLG_FIRST;
 661   auth_length = common_hdr.auth_len;
 662   if (auth_length) {
 663     auth_data = HeapAlloc(GetProcessHeap(), 0, RPC_AUTH_VERIFIER_LEN(&common_hdr));
 664     if (!auth_data) {
 665       status = RPC_S_PROTOCOL_ERROR;
 666       goto fail;
 667     }
 668   }
 669   buffer_length = 0;
 670   while (TRUE)
 671   {
 672     unsigned int header_auth_len = RPC_AUTH_VERIFIER_LEN(&(*Header)->common);
 673
 674     /* verify header fields */
 675
 676     if (((*Header)->common.frag_len < hdr_length) ||
 677         ((*Header)->common.frag_len - hdr_length < header_auth_len)) {
 678       WARN("frag_len %d too small for hdr_length %d and auth_len %d\n",
 679         common_hdr.frag_len, hdr_length, common_hdr.auth_len);
 680       status = RPC_S_PROTOCOL_ERROR;
 681       goto fail;
 682     }
 683
 684     if ((*Header)->common.auth_len != auth_length) {
 685       WARN("auth_len header field changed from %ld to %d\n",
 686         auth_length, (*Header)->common.auth_len);
 687       status = RPC_S_PROTOCOL_ERROR;
 688       goto fail;
 689     }
 690
 691     if (((*Header)->common.flags & RPC_FLG_FIRST) != first_flag) {
 692       TRACE("invalid packet flags\n");
 693       status = RPC_S_PROTOCOL_ERROR;
 694       goto fail;
 695     }
 696
 697     data_length = (*Header)->common.frag_len - hdr_length - header_auth_len;
 698     if (data_length + buffer_length > pMsg->BufferLength) {
 699       TRACE("allocation hint exceeded, new buffer length = %ld\n",
 700         data_length + buffer_length);
 701       pMsg->BufferLength = data_length + buffer_length;
 702       status = I_RpcReAllocateBuffer(pMsg);
 703       if (status != RPC_S_OK) goto fail;
 704     }
 705
 706     if (data_length == 0) dwRead = 0; else
 707     dwRead = rpcrt4_conn_read(Connection,
 708         (unsigned char *)pMsg->Buffer + buffer_length, data_length);
 709     if (dwRead != data_length) {
 710       WARN("bad data length, %d/%ld\n", dwRead, data_length);
 711       status = RPC_S_PROTOCOL_ERROR;
 712       goto fail;
 713     }
 714
 715     if (header_auth_len) {
 716       if (header_auth_len < sizeof(RpcAuthVerifier)) {
 717         WARN("bad auth verifier length %d\n", header_auth_len);
 718         status = RPC_S_PROTOCOL_ERROR;
 719         goto fail;
 720       }
 721
 722       /* FIXME: we should accumulate authentication data for the bind,
 723        * bind_ack, alter_context and alter_context_response if necessary.
 724        * however, the details of how this is done is very sketchy in the
 725        * DCE/RPC spec. for all other packet types that have authentication
 726        * verifier data then it is just duplicated in all the fragments */
 727       dwRead = rpcrt4_conn_read(Connection, auth_data, header_auth_len);
 728       if (dwRead != header_auth_len) {
 729         WARN("bad authentication data length, %d/%d\n", dwRead,
 730           header_auth_len);
 731         status = RPC_S_PROTOCOL_ERROR;
 732         goto fail;
 733       }
 734
 735       /* these packets are handled specially, not by the generic SecurePacket
 736        * function */
 737       if ((common_hdr.ptype != PKT_BIND) &&
 738           (common_hdr.ptype != PKT_BIND_ACK) &&
 739           (common_hdr.ptype != PKT_AUTH3))
 740         status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_RECEIVE,
 741             *Header, hdr_length,
 742             (unsigned char *)pMsg->Buffer + buffer_length, data_length,
 743             (RpcAuthVerifier *)auth_data,
 744             (unsigned char *)auth_data + sizeof(RpcAuthVerifier),
 745             header_auth_len - sizeof(RpcAuthVerifier));
 746     }
 747
 748     buffer_length += data_length;
 749     if (!((*Header)->common.flags & RPC_FLG_LAST)) {
 750       TRACE("next header\n");
 751
 752       /* read the header of next packet */
 753       dwRead = rpcrt4_conn_read(Connection, *Header, hdr_length);
 754       if (dwRead != hdr_length) {
 755         WARN("invalid packet header size (%d)\n", dwRead);
 756         status = RPC_S_PROTOCOL_ERROR;
 757         goto fail;
 758       }
 759
 760       first_flag = 0;
 761     } else {
 762       break;
 763     }
 764   }
 765   pMsg->BufferLength = buffer_length;
 766
 767   /* respond to authorization request */
 768   if (common_hdr.ptype == PKT_BIND_ACK && auth_length > sizeof(RpcAuthVerifier))
 769   {
 770     status = RPCRT_AuthorizeConnection(Connection,
 771                                        auth_data + sizeof(RpcAuthVerifier),
 772                                        auth_length);
 773     if (status)
 774         goto fail;
 775   }
 776
 777   /* success */
 778   status = RPC_S_OK;
 779
 780 fail:
 781   if (status != RPC_S_OK) {
 782     RPCRT4_FreeHeader(*Header);
 783     *Header = NULL;
 784   }
 785   HeapFree(GetProcessHeap(), 0, auth_data);
 786   return status;
 787 }
 788
 789 /***********************************************************************
 790  *           I_RpcGetBuffer [RPCRT4.@]
 791  */
 792 RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
 793 {
 794   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 795   /* FIXME: pfnAllocate? */
 796   pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
 797
 798   TRACE("Buffer=%p\n", pMsg->Buffer);
 799   /* FIXME: which errors to return? */
 800   return pMsg->Buffer ? S_OK : E_OUTOFMEMORY;
 801 }
 802
 803 /***********************************************************************
 804  *           I_RpcReAllocateBuffer (internal)
 805  */
 806 static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg)
 807 {
 808   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 809   pMsg->Buffer = HeapReAlloc(GetProcessHeap(), 0, pMsg->Buffer, pMsg->BufferLength);
 810
 811   TRACE("Buffer=%p\n", pMsg->Buffer);
 812   return pMsg->Buffer ? RPC_S_OK : RPC_S_OUT_OF_RESOURCES;
 813 }
 814
 815 /***********************************************************************
 816  *           I_RpcFreeBuffer [RPCRT4.@]
 817  */
 818 RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
 819 {
 820   TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
 821   /* FIXME: pfnFree? */
 822   HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
 823   pMsg->Buffer = NULL;
 824   return S_OK;
 825 }
 826
 827 /***********************************************************************
 828  *           I_RpcSend [RPCRT4.@]
 829  */
 830 RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
 831 {
 832   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 833   RpcConnection* conn;
 834   RPC_CLIENT_INTERFACE* cif = NULL;
 835   RPC_SERVER_INTERFACE* sif = NULL;
 836   RPC_STATUS status;
 837   RpcPktHdr *hdr;
 838
 839   TRACE("(%p)\n", pMsg);
 840   if (!bind) return RPC_S_INVALID_BINDING;
 841
 842   if (bind->server) {
 843     sif = pMsg->RpcInterfaceInformation;
 844     if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 845     status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
 846                                 &sif->InterfaceId);
 847   } else {
 848     cif = pMsg->RpcInterfaceInformation;
 849     if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 850
 851     if (!bind->Endpoint || !bind->Endpoint[0])
 852     {
 853       TRACE("automatically resolving partially bound binding\n");
 854       status = RpcEpResolveBinding(bind, cif);
 855       if (status != RPC_S_OK) return status;
 856     }
 857
 858     status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 859                                 &cif->InterfaceId);
 860   }
 861
 862   if (status != RPC_S_OK) return status;
 863
 864   if (bind->server) {
 865     if (pMsg->RpcFlags & WINE_RPCFLAG_EXCEPTION) {
 866       hdr = RPCRT4_BuildFaultHeader(pMsg->DataRepresentation,
 867                                     RPC_S_CALL_FAILED);
 868     } else {
 869       hdr = RPCRT4_BuildResponseHeader(pMsg->DataRepresentation,
 870                                        pMsg->BufferLength);
 871     }
 872   } else {
 873     hdr = RPCRT4_BuildRequestHeader(pMsg->DataRepresentation,
 874                                     pMsg->BufferLength, pMsg->ProcNum,
 875                                     &bind->ObjectUuid);
 876     hdr->common.call_id = conn->NextCallId++;
 877   }
 878
 879   status = RPCRT4_Send(conn, hdr, pMsg->Buffer, pMsg->BufferLength);
 880
 881   RPCRT4_FreeHeader(hdr);
 882
 883   /* success */
 884   if (!bind->server) {
 885     /* save the connection, so the response can be read from it */
 886     pMsg->ReservedForRuntime = conn;
 887     return status;
 888   }
 889   RPCRT4_CloseBinding(bind, conn);
 890
 891   return status;
 892 }
 893
 894 /***********************************************************************
 895  *           I_RpcReceive [RPCRT4.@]
 896  */
 897 RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
 898 {
 899   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 900   RpcConnection* conn;
 901   RPC_CLIENT_INTERFACE* cif = NULL;
 902   RPC_SERVER_INTERFACE* sif = NULL;
 903   RPC_STATUS status;
 904   RpcPktHdr *hdr = NULL;
 905
 906   TRACE("(%p)\n", pMsg);
 907   if (!bind) return RPC_S_INVALID_BINDING;
 908
 909   if (pMsg->ReservedForRuntime) {
 910     conn = pMsg->ReservedForRuntime;
 911     pMsg->ReservedForRuntime = NULL;
 912   } else {
 913     if (bind->server) {
 914       sif = pMsg->RpcInterfaceInformation;
 915       if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 916       status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
 917                                   &sif->InterfaceId);
 918     } else {
 919       cif = pMsg->RpcInterfaceInformation;
 920       if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 921
 922       if (!bind->Endpoint || !bind->Endpoint[0])
 923       {
 924         TRACE("automatically resolving partially bound binding\n");
 925         status = RpcEpResolveBinding(bind, cif);
 926         if (status != RPC_S_OK) return status;
 927       }
 928
 929       status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 930                                   &cif->InterfaceId);
 931     }
 932     if (status != RPC_S_OK) return status;
 933   }
 934
 935   status = RPCRT4_Receive(conn, &hdr, pMsg);
 936   if (status != RPC_S_OK) {
 937     WARN("receive failed with error %lx\n", status);
 938     goto fail;
 939   }
 940
 941   status = RPC_S_PROTOCOL_ERROR;
 942
 943   switch (hdr->common.ptype) {
 944   case PKT_RESPONSE:
 945     if (bind->server) goto fail;
 946     break;
 947   case PKT_REQUEST:
 948     if (!bind->server) goto fail;
 949     break;
 950   case PKT_FAULT:
 951     pMsg->RpcFlags |= WINE_RPCFLAG_EXCEPTION;
 952     ERR ("we got fault packet with status 0x%lx\n", hdr->fault.status);
 953     status = hdr->fault.status; /* FIXME: do translation from nca error codes */
 954     goto fail;
 955   default:
 956     WARN("bad packet type %d\n", hdr->common.ptype);
 957     goto fail;
 958   }
 959
 960   /* success */
 961   status = RPC_S_OK;
 962
 963 fail:
 964   RPCRT4_FreeHeader(hdr);
 965   RPCRT4_CloseBinding(bind, conn);
 966   return status;
 967 }
 968
 969 /***********************************************************************
 970  *           I_RpcSendReceive [RPCRT4.@]
 971  */
 972 RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
 973 {
 974   RPC_STATUS status;
 975
 976   TRACE("(%p)\n", pMsg);
 977   status = I_RpcSend(pMsg);
 978   if (status == RPC_S_OK)
 979     status = I_RpcReceive(pMsg);
 980   return status;
 981 }