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   SecInvalidateHandle(&conn->ctx);
 489
 490   r = InitializeSecurityContextA(&conn->AuthInfo->cred, NULL, NULL,
 491         context_req, 0, SECURITY_NETWORK_DREP,
 492         NULL, 0, &conn->ctx, &out_desc, &conn->attr, &conn->exp);
 493
 494   TRACE("r = %08x cbBuffer = %ld attr = %08x\n", r, out->cbBuffer, conn->attr);
 495 }
 496
 497 /***********************************************************************
 498  *           RPCRT4_AuthorizeBinding (internal)
 499  */
 500 static RPC_STATUS RPCRT_AuthorizeConnection(RpcConnection* conn,
 501                                             BYTE *challenge, ULONG count)
 502 {
 503   SecBufferDesc inp_desc, out_desc;
 504   SecBuffer inp, out;
 505   SECURITY_STATUS r;
 506   unsigned char buffer[0x100];
 507   RpcPktHdr *resp_hdr;
 508   RPC_STATUS status;
 509   ULONG context_req = ISC_REQ_CONNECTION | ISC_REQ_USE_DCE_STYLE |
 510                       ISC_REQ_MUTUAL_AUTH | ISC_REQ_DELEGATE;
 511
 512   TRACE("challenge %s, %d bytes\n", challenge, count);
 513
 514   if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_INTEGRITY)
 515     context_req |= ISC_REQ_INTEGRITY;
 516   else if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
 517     context_req |= ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY;
 518
 519   out.BufferType = SECBUFFER_TOKEN;
 520   out.cbBuffer = sizeof buffer;
 521   out.pvBuffer = buffer;
 522
 523   out_desc.ulVersion = 0;
 524   out_desc.cBuffers = 1;
 525   out_desc.pBuffers = &out;
 526
 527   inp.BufferType = SECBUFFER_TOKEN;
 528   inp.pvBuffer = challenge;
 529   inp.cbBuffer = count;
 530
 531   inp_desc.cBuffers = 1;
 532   inp_desc.pBuffers = &inp;
 533   inp_desc.ulVersion = 0;
 534
 535   r = InitializeSecurityContextA(&conn->AuthInfo->cred, &conn->ctx, NULL,
 536         context_req, 0, SECURITY_NETWORK_DREP,
 537         &inp_desc, 0, &conn->ctx, &out_desc, &conn->attr, &conn->exp);
 538   if (r)
 539   {
 540     WARN("InitializeSecurityContext failed with error 0x%08x\n", r);
 541     return ERROR_ACCESS_DENIED;
 542   }
 543
 544   resp_hdr = RPCRT4_BuildAuthHeader(NDR_LOCAL_DATA_REPRESENTATION);
 545   if (!resp_hdr)
 546     return E_OUTOFMEMORY;
 547
 548   status = RPCRT4_SendAuth(conn, resp_hdr, NULL, 0, out.pvBuffer, out.cbBuffer);
 549
 550   RPCRT4_FreeHeader(resp_hdr);
 551
 552   return status;
 553 }
 554
 555 /***********************************************************************
 556  *           RPCRT4_Send (internal)
 557  *
 558  * Transmit a packet over connection in acceptable fragments.
 559  */
 560 RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
 561                        void *Buffer, unsigned int BufferLength)
 562 {
 563   RPC_STATUS r;
 564   SecBuffer out;
 565
 566   if (!Connection->AuthInfo || SecIsValidHandle(&Connection->ctx))
 567   {
 568     return RPCRT4_SendAuth(Connection, Header, Buffer, BufferLength, NULL, 0);
 569   }
 570
 571   out.BufferType = SECBUFFER_TOKEN;
 572   out.cbBuffer = 0;
 573   out.pvBuffer = NULL;
 574
 575   /* tack on a negotiate packet */
 576   RPCRT4_AuthNegotiate(Connection, &out);
 577   r = RPCRT4_SendAuth(Connection, Header, Buffer, BufferLength, out.pvBuffer, out.cbBuffer);
 578   HeapFree(GetProcessHeap(), 0, out.pvBuffer);
 579
 580   return r;
 581 }
 582
 583 /***********************************************************************
 584  *           RPCRT4_Receive (internal)
 585  *
 586  * Receive a packet from connection and merge the fragments.
 587  */
 588 RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
 589                           PRPC_MESSAGE pMsg)
 590 {
 591   RPC_STATUS status;
 592   DWORD hdr_length;
 593   LONG dwRead;
 594   unsigned short first_flag;
 595   unsigned long data_length;
 596   unsigned long buffer_length;
 597   unsigned long auth_length;
 598   unsigned char *auth_data = NULL;
 599   RpcPktCommonHdr common_hdr;
 600
 601   *Header = NULL;
 602
 603   TRACE("(%p, %p, %p)\n", Connection, Header, pMsg);
 604
 605   /* read packet common header */
 606   dwRead = rpcrt4_conn_read(Connection, &common_hdr, sizeof(common_hdr));
 607   if (dwRead != sizeof(common_hdr)) {
 608     WARN("Short read of header, %d bytes\n", dwRead);
 609     status = RPC_S_PROTOCOL_ERROR;
 610     goto fail;
 611   }
 612
 613   /* verify if the header really makes sense */
 614   if (common_hdr.rpc_ver != RPC_VER_MAJOR ||
 615       common_hdr.rpc_ver_minor != RPC_VER_MINOR) {
 616     WARN("unhandled packet version\n");
 617     status = RPC_S_PROTOCOL_ERROR;
 618     goto fail;
 619   }
 620
 621   hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
 622   if (hdr_length == 0) {
 623     WARN("header length == 0\n");
 624     status = RPC_S_PROTOCOL_ERROR;
 625     goto fail;
 626   }
 627
 628   *Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
 629   memcpy(*Header, &common_hdr, sizeof(common_hdr));
 630
 631   /* read the rest of packet header */
 632   dwRead = rpcrt4_conn_read(Connection, &(*Header)->common + 1, hdr_length - sizeof(common_hdr));
 633   if (dwRead != hdr_length - sizeof(common_hdr)) {
 634     WARN("bad header length, %d bytes, hdr_length %d\n", dwRead, hdr_length);
 635     status = RPC_S_PROTOCOL_ERROR;
 636     goto fail;
 637   }
 638
 639   /* read packet body */
 640   switch (common_hdr.ptype) {
 641   case PKT_RESPONSE:
 642     pMsg->BufferLength = (*Header)->response.alloc_hint;
 643     break;
 644   case PKT_REQUEST:
 645     pMsg->BufferLength = (*Header)->request.alloc_hint;
 646     break;
 647   default:
 648     pMsg->BufferLength = common_hdr.frag_len - hdr_length - RPC_AUTH_VERIFIER_LEN(&common_hdr);
 649   }
 650
 651   TRACE("buffer length = %u\n", pMsg->BufferLength);
 652
 653   status = I_RpcGetBuffer(pMsg);
 654   if (status != RPC_S_OK) goto fail;
 655
 656   first_flag = RPC_FLG_FIRST;
 657   auth_length = common_hdr.auth_len;
 658   if (auth_length) {
 659     auth_data = HeapAlloc(GetProcessHeap(), 0, RPC_AUTH_VERIFIER_LEN(&common_hdr));
 660     if (!auth_data) {
 661       status = RPC_S_PROTOCOL_ERROR;
 662       goto fail;
 663     }
 664   }
 665   buffer_length = 0;
 666   while (TRUE)
 667   {
 668     unsigned int header_auth_len = RPC_AUTH_VERIFIER_LEN(&(*Header)->common);
 669
 670     /* verify header fields */
 671
 672     if (((*Header)->common.frag_len < hdr_length) ||
 673         ((*Header)->common.frag_len - hdr_length < header_auth_len)) {
 674       WARN("frag_len %d too small for hdr_length %d and auth_len %d\n",
 675         common_hdr.frag_len, hdr_length, common_hdr.auth_len);
 676       status = RPC_S_PROTOCOL_ERROR;
 677       goto fail;
 678     }
 679
 680     if ((*Header)->common.auth_len != auth_length) {
 681       WARN("auth_len header field changed from %ld to %d\n",
 682         auth_length, (*Header)->common.auth_len);
 683       status = RPC_S_PROTOCOL_ERROR;
 684       goto fail;
 685     }
 686
 687     if (((*Header)->common.flags & RPC_FLG_FIRST) != first_flag) {
 688       TRACE("invalid packet flags\n");
 689       status = RPC_S_PROTOCOL_ERROR;
 690       goto fail;
 691     }
 692
 693     data_length = (*Header)->common.frag_len - hdr_length - header_auth_len;
 694     if (data_length + buffer_length > pMsg->BufferLength) {
 695       TRACE("allocation hint exceeded, new buffer length = %ld\n",
 696         data_length + buffer_length);
 697       pMsg->BufferLength = data_length + buffer_length;
 698       status = I_RpcReAllocateBuffer(pMsg);
 699       if (status != RPC_S_OK) goto fail;
 700     }
 701
 702     if (data_length == 0) dwRead = 0; else
 703     dwRead = rpcrt4_conn_read(Connection,
 704         (unsigned char *)pMsg->Buffer + buffer_length, data_length);
 705     if (dwRead != data_length) {
 706       WARN("bad data length, %d/%ld\n", dwRead, data_length);
 707       status = RPC_S_PROTOCOL_ERROR;
 708       goto fail;
 709     }
 710
 711     if (header_auth_len) {
 712       if (header_auth_len < sizeof(RpcAuthVerifier)) {
 713         WARN("bad auth verifier length %d\n", header_auth_len);
 714         status = RPC_S_PROTOCOL_ERROR;
 715         goto fail;
 716       }
 717
 718       /* FIXME: we should accumulate authentication data for the bind,
 719        * bind_ack, alter_context and alter_context_response if necessary.
 720        * however, the details of how this is done is very sketchy in the
 721        * DCE/RPC spec. for all other packet types that have authentication
 722        * verifier data then it is just duplicated in all the fragments */
 723       dwRead = rpcrt4_conn_read(Connection, auth_data, header_auth_len);
 724       if (dwRead != header_auth_len) {
 725         WARN("bad authentication data length, %d/%d\n", dwRead,
 726           header_auth_len);
 727         status = RPC_S_PROTOCOL_ERROR;
 728         goto fail;
 729       }
 730
 731       /* these packets are handled specially, not by the generic SecurePacket
 732        * function */
 733       if ((common_hdr.ptype != PKT_BIND) &&
 734           (common_hdr.ptype != PKT_BIND_ACK) &&
 735           (common_hdr.ptype != PKT_AUTH3))
 736         status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_RECEIVE,
 737             *Header, hdr_length,
 738             (unsigned char *)pMsg->Buffer + buffer_length, data_length,
 739             (RpcAuthVerifier *)auth_data,
 740             (unsigned char *)auth_data + sizeof(RpcAuthVerifier),
 741             header_auth_len - sizeof(RpcAuthVerifier));
 742     }
 743
 744     buffer_length += data_length;
 745     if (!((*Header)->common.flags & RPC_FLG_LAST)) {
 746       TRACE("next header\n");
 747
 748       /* read the header of next packet */
 749       dwRead = rpcrt4_conn_read(Connection, *Header, hdr_length);
 750       if (dwRead != hdr_length) {
 751         WARN("invalid packet header size (%d)\n", dwRead);
 752         status = RPC_S_PROTOCOL_ERROR;
 753         goto fail;
 754       }
 755
 756       first_flag = 0;
 757     } else {
 758       break;
 759     }
 760   }
 761   pMsg->BufferLength = buffer_length;
 762
 763   /* respond to authorization request */
 764   if (common_hdr.ptype == PKT_BIND_ACK && auth_length > sizeof(RpcAuthVerifier))
 765   {
 766     status = RPCRT_AuthorizeConnection(Connection,
 767                                        auth_data + sizeof(RpcAuthVerifier),
 768                                        auth_length);
 769     if (status)
 770         goto fail;
 771   }
 772
 773   /* success */
 774   status = RPC_S_OK;
 775
 776 fail:
 777   if (status != RPC_S_OK) {
 778     RPCRT4_FreeHeader(*Header);
 779     *Header = NULL;
 780   }
 781   HeapFree(GetProcessHeap(), 0, auth_data);
 782   return status;
 783 }
 784
 785 /***********************************************************************
 786  *           I_RpcGetBuffer [RPCRT4.@]
 787  */
 788 RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
 789 {
 790   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 791   /* FIXME: pfnAllocate? */
 792   pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
 793
 794   TRACE("Buffer=%p\n", pMsg->Buffer);
 795   /* FIXME: which errors to return? */
 796   return pMsg->Buffer ? S_OK : E_OUTOFMEMORY;
 797 }
 798
 799 /***********************************************************************
 800  *           I_RpcReAllocateBuffer (internal)
 801  */
 802 static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg)
 803 {
 804   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 805   pMsg->Buffer = HeapReAlloc(GetProcessHeap(), 0, pMsg->Buffer, pMsg->BufferLength);
 806
 807   TRACE("Buffer=%p\n", pMsg->Buffer);
 808   return pMsg->Buffer ? RPC_S_OK : RPC_S_OUT_OF_RESOURCES;
 809 }
 810
 811 /***********************************************************************
 812  *           I_RpcFreeBuffer [RPCRT4.@]
 813  */
 814 RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
 815 {
 816   TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
 817   /* FIXME: pfnFree? */
 818   HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
 819   pMsg->Buffer = NULL;
 820   return S_OK;
 821 }
 822
 823 /***********************************************************************
 824  *           I_RpcSend [RPCRT4.@]
 825  */
 826 RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
 827 {
 828   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 829   RpcConnection* conn;
 830   RPC_CLIENT_INTERFACE* cif = NULL;
 831   RPC_SERVER_INTERFACE* sif = NULL;
 832   RPC_STATUS status;
 833   RpcPktHdr *hdr;
 834
 835   TRACE("(%p)\n", pMsg);
 836   if (!bind) return RPC_S_INVALID_BINDING;
 837
 838   if (bind->server) {
 839     sif = pMsg->RpcInterfaceInformation;
 840     if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 841     status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
 842                                 &sif->InterfaceId);
 843   } else {
 844     cif = pMsg->RpcInterfaceInformation;
 845     if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 846
 847     if (!bind->Endpoint || !bind->Endpoint[0])
 848     {
 849       TRACE("automatically resolving partially bound binding\n");
 850       status = RpcEpResolveBinding(bind, cif);
 851       if (status != RPC_S_OK) return status;
 852     }
 853
 854     status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 855                                 &cif->InterfaceId);
 856   }
 857
 858   if (status != RPC_S_OK) return status;
 859
 860   if (bind->server) {
 861     if (pMsg->RpcFlags & WINE_RPCFLAG_EXCEPTION) {
 862       hdr = RPCRT4_BuildFaultHeader(pMsg->DataRepresentation,
 863                                     RPC_S_CALL_FAILED);
 864     } else {
 865       hdr = RPCRT4_BuildResponseHeader(pMsg->DataRepresentation,
 866                                        pMsg->BufferLength);
 867     }
 868   } else {
 869     hdr = RPCRT4_BuildRequestHeader(pMsg->DataRepresentation,
 870                                     pMsg->BufferLength, pMsg->ProcNum,
 871                                     &bind->ObjectUuid);
 872     hdr->common.call_id = conn->NextCallId++;
 873   }
 874
 875   status = RPCRT4_Send(conn, hdr, pMsg->Buffer, pMsg->BufferLength);
 876
 877   RPCRT4_FreeHeader(hdr);
 878
 879   /* success */
 880   if (!bind->server) {
 881     /* save the connection, so the response can be read from it */
 882     pMsg->ReservedForRuntime = conn;
 883     return status;
 884   }
 885   RPCRT4_CloseBinding(bind, conn);
 886
 887   return status;
 888 }
 889
 890 /***********************************************************************
 891  *           I_RpcReceive [RPCRT4.@]
 892  */
 893 RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
 894 {
 895   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 896   RpcConnection* conn;
 897   RPC_CLIENT_INTERFACE* cif = NULL;
 898   RPC_SERVER_INTERFACE* sif = NULL;
 899   RPC_STATUS status;
 900   RpcPktHdr *hdr = NULL;
 901
 902   TRACE("(%p)\n", pMsg);
 903   if (!bind) return RPC_S_INVALID_BINDING;
 904
 905   if (pMsg->ReservedForRuntime) {
 906     conn = pMsg->ReservedForRuntime;
 907     pMsg->ReservedForRuntime = NULL;
 908   } else {
 909     if (bind->server) {
 910       sif = pMsg->RpcInterfaceInformation;
 911       if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 912       status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
 913                                   &sif->InterfaceId);
 914     } else {
 915       cif = pMsg->RpcInterfaceInformation;
 916       if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 917
 918       if (!bind->Endpoint || !bind->Endpoint[0])
 919       {
 920         TRACE("automatically resolving partially bound binding\n");
 921         status = RpcEpResolveBinding(bind, cif);
 922         if (status != RPC_S_OK) return status;
 923       }
 924
 925       status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 926                                   &cif->InterfaceId);
 927     }
 928     if (status != RPC_S_OK) return status;
 929   }
 930
 931   status = RPCRT4_Receive(conn, &hdr, pMsg);
 932   if (status != RPC_S_OK) {
 933     WARN("receive failed with error %lx\n", status);
 934     goto fail;
 935   }
 936
 937   status = RPC_S_PROTOCOL_ERROR;
 938
 939   switch (hdr->common.ptype) {
 940   case PKT_RESPONSE:
 941     if (bind->server) goto fail;
 942     break;
 943   case PKT_REQUEST:
 944     if (!bind->server) goto fail;
 945     break;
 946   case PKT_FAULT:
 947     pMsg->RpcFlags |= WINE_RPCFLAG_EXCEPTION;
 948     ERR ("we got fault packet with status 0x%lx\n", hdr->fault.status);
 949     status = hdr->fault.status; /* FIXME: do translation from nca error codes */
 950     goto fail;
 951   default:
 952     WARN("bad packet type %d\n", hdr->common.ptype);
 953     goto fail;
 954   }
 955
 956   /* success */
 957   status = RPC_S_OK;
 958
 959 fail:
 960   RPCRT4_FreeHeader(hdr);
 961   RPCRT4_CloseBinding(bind, conn);
 962   return status;
 963 }
 964
 965 /***********************************************************************
 966  *           I_RpcSendReceive [RPCRT4.@]
 967  */
 968 RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
 969 {
 970   RPC_STATUS status;
 971
 972   TRACE("(%p)\n", pMsg);
 973   status = I_RpcSend(pMsg);
 974   if (status == RPC_S_OK)
 975     status = I_RpcReceive(pMsg);
 976   return status;
 977 }