rpc_message.c 43.7 KB
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/*
 * RPC messages
 *
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 * Copyright 2001-2002 Ove Kåven, TransGaming Technologies
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 * Copyright 2004 Filip Navara
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 * Copyright 2006 CodeWeavers
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 *
 * 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
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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 */

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#include <stdarg.h>
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#include <stdio.h>
#include <string.h>

#include "windef.h"
#include "winbase.h"
#include "winerror.h"
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#include "winuser.h"
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#include "rpc.h"
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#include "rpcndr.h"
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#include "rpcdcep.h"

#include "wine/debug.h"

#include "rpc_binding.h"
#include "rpc_defs.h"
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#include "rpc_message.h"
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#include "ncastatus.h"
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WINE_DEFAULT_DEBUG_CHANNEL(rpc);
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/* note: the DCE/RPC spec says the alignment amount should be 4, but
 * MS/RPC servers seem to always use 16 */
#define AUTH_ALIGNMENT 16

/* gets the amount needed to round a value up to the specified alignment */
#define ROUND_UP_AMOUNT(value, alignment) \
    (((alignment) - (((value) % (alignment)))) % (alignment))
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#define ROUND_UP(value, alignment) (((value) + ((alignment) - 1)) & ~((alignment)-1))
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enum secure_packet_direction
{
  SECURE_PACKET_SEND,
  SECURE_PACKET_RECEIVE
};

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static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg);

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static DWORD RPCRT4_GetHeaderSize(const RpcPktHdr *Header)
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{
  static const DWORD header_sizes[] = {
    sizeof(Header->request), 0, sizeof(Header->response),
    sizeof(Header->fault), 0, 0, 0, 0, 0, 0, 0, sizeof(Header->bind),
    sizeof(Header->bind_ack), sizeof(Header->bind_nack),
    0, 0, 0, 0, 0
  };
  ULONG ret = 0;
  
  if (Header->common.ptype < sizeof(header_sizes) / sizeof(header_sizes[0])) {
    ret = header_sizes[Header->common.ptype];
    if (ret == 0)
      FIXME("unhandled packet type\n");
    if (Header->common.flags & RPC_FLG_OBJECT_UUID)
      ret += sizeof(UUID);
  } else {
    TRACE("invalid packet type\n");
  }

  return ret;
}

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static int packet_has_body(const RpcPktHdr *Header)
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{
    return (Header->common.ptype == PKT_FAULT) ||
           (Header->common.ptype == PKT_REQUEST) ||
           (Header->common.ptype == PKT_RESPONSE);
}

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static int packet_has_auth_verifier(const RpcPktHdr *Header)
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{
    return !(Header->common.ptype == PKT_BIND_NACK) &&
           !(Header->common.ptype == PKT_SHUTDOWN);
}

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static VOID RPCRT4_BuildCommonHeader(RpcPktHdr *Header, unsigned char PacketType,
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                              unsigned long DataRepresentation)
{
  Header->common.rpc_ver = RPC_VER_MAJOR;
  Header->common.rpc_ver_minor = RPC_VER_MINOR;
  Header->common.ptype = PacketType;
  Header->common.drep[0] = LOBYTE(LOWORD(DataRepresentation));
  Header->common.drep[1] = HIBYTE(LOWORD(DataRepresentation));
  Header->common.drep[2] = LOBYTE(HIWORD(DataRepresentation));
  Header->common.drep[3] = HIBYTE(HIWORD(DataRepresentation));
  Header->common.auth_len = 0;
  Header->common.call_id = 1;
  Header->common.flags = 0;
  /* Flags and fragment length are computed in RPCRT4_Send. */
}                              

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static RpcPktHdr *RPCRT4_BuildRequestHeader(unsigned long DataRepresentation,
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                                     unsigned long BufferLength,
                                     unsigned short ProcNum,
                                     UUID *ObjectUuid)
{
  RpcPktHdr *header;
  BOOL has_object;
  RPC_STATUS status;

  has_object = (ObjectUuid != NULL && !UuidIsNil(ObjectUuid, &status));
  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
                     sizeof(header->request) + (has_object ? sizeof(UUID) : 0));
  if (header == NULL) {
    return NULL;
  }

  RPCRT4_BuildCommonHeader(header, PKT_REQUEST, DataRepresentation);
  header->common.frag_len = sizeof(header->request);
  header->request.alloc_hint = BufferLength;
  header->request.context_id = 0;
  header->request.opnum = ProcNum;
  if (has_object) {
    header->common.flags |= RPC_FLG_OBJECT_UUID;
    header->common.frag_len += sizeof(UUID);
    memcpy(&header->request + 1, ObjectUuid, sizeof(UUID));
  }

  return header;
}

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RpcPktHdr *RPCRT4_BuildResponseHeader(unsigned long DataRepresentation,
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                                      unsigned long BufferLength)
{
  RpcPktHdr *header;

  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->response));
  if (header == NULL) {
    return NULL;
  }

  RPCRT4_BuildCommonHeader(header, PKT_RESPONSE, DataRepresentation);
  header->common.frag_len = sizeof(header->response);
  header->response.alloc_hint = BufferLength;

  return header;
}

RpcPktHdr *RPCRT4_BuildFaultHeader(unsigned long DataRepresentation,
                                   RPC_STATUS Status)
{
  RpcPktHdr *header;

  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->fault));
  if (header == NULL) {
    return NULL;
  }

  RPCRT4_BuildCommonHeader(header, PKT_FAULT, DataRepresentation);
  header->common.frag_len = sizeof(header->fault);
  header->fault.status = Status;

  return header;
}

RpcPktHdr *RPCRT4_BuildBindHeader(unsigned long DataRepresentation,
                                  unsigned short MaxTransmissionSize,
                                  unsigned short MaxReceiveSize,
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                                  unsigned long  AssocGroupId,
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                                  const RPC_SYNTAX_IDENTIFIER *AbstractId,
                                  const RPC_SYNTAX_IDENTIFIER *TransferId)
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{
  RpcPktHdr *header;

  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind));
  if (header == NULL) {
    return NULL;
  }

  RPCRT4_BuildCommonHeader(header, PKT_BIND, DataRepresentation);
  header->common.frag_len = sizeof(header->bind);
  header->bind.max_tsize = MaxTransmissionSize;
  header->bind.max_rsize = MaxReceiveSize;
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  header->bind.assoc_gid = AssocGroupId;
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  header->bind.num_elements = 1;
  header->bind.num_syntaxes = 1;
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  header->bind.abstract = *AbstractId;
  header->bind.transfer = *TransferId;
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  return header;
}

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static RpcPktHdr *RPCRT4_BuildAuthHeader(unsigned long DataRepresentation)
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{
  RpcPktHdr *header;

  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
                     sizeof(header->common) + 12);
  if (header == NULL)
    return NULL;

  RPCRT4_BuildCommonHeader(header, PKT_AUTH3, DataRepresentation);
  header->common.frag_len = 0x14;
  header->common.auth_len = 0;

  return header;
}

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RpcPktHdr *RPCRT4_BuildBindNackHeader(unsigned long DataRepresentation,
                                      unsigned char RpcVersion,
                                      unsigned char RpcVersionMinor)
{
  RpcPktHdr *header;

  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind_nack));
  if (header == NULL) {
    return NULL;
  }

  RPCRT4_BuildCommonHeader(header, PKT_BIND_NACK, DataRepresentation);
  header->common.frag_len = sizeof(header->bind_nack);
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  header->bind_nack.reject_reason = REJECT_REASON_NOT_SPECIFIED;
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  header->bind_nack.protocols_count = 1;
  header->bind_nack.protocols[0].rpc_ver = RpcVersion;
  header->bind_nack.protocols[0].rpc_ver_minor = RpcVersionMinor;

  return header;
}

RpcPktHdr *RPCRT4_BuildBindAckHeader(unsigned long DataRepresentation,
                                     unsigned short MaxTransmissionSize,
                                     unsigned short MaxReceiveSize,
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                                     unsigned long AssocGroupId,
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                                     LPCSTR ServerAddress,
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                                     unsigned long Result,
                                     unsigned long Reason,
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                                     const RPC_SYNTAX_IDENTIFIER *TransferId)
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{
  RpcPktHdr *header;
  unsigned long header_size;
  RpcAddressString *server_address;
  RpcResults *results;
  RPC_SYNTAX_IDENTIFIER *transfer_id;

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  header_size = sizeof(header->bind_ack) +
                ROUND_UP(FIELD_OFFSET(RpcAddressString, string[strlen(ServerAddress) + 1]), 4) +
                sizeof(RpcResults) +
                sizeof(RPC_SYNTAX_IDENTIFIER);
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  header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, header_size);
  if (header == NULL) {
    return NULL;
  }

  RPCRT4_BuildCommonHeader(header, PKT_BIND_ACK, DataRepresentation);
  header->common.frag_len = header_size;
  header->bind_ack.max_tsize = MaxTransmissionSize;
  header->bind_ack.max_rsize = MaxReceiveSize;
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  header->bind_ack.assoc_gid = AssocGroupId;
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  server_address = (RpcAddressString*)(&header->bind_ack + 1);
  server_address->length = strlen(ServerAddress) + 1;
  strcpy(server_address->string, ServerAddress);
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  /* results is 4-byte aligned */
  results = (RpcResults*)((ULONG_PTR)server_address + ROUND_UP(FIELD_OFFSET(RpcAddressString, string[server_address->length]), 4));
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  results->num_results = 1;
  results->results[0].result = Result;
  results->results[0].reason = Reason;
  transfer_id = (RPC_SYNTAX_IDENTIFIER*)(results + 1);
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  *transfer_id = *TransferId;
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  return header;
}

VOID RPCRT4_FreeHeader(RpcPktHdr *Header)
{
  HeapFree(GetProcessHeap(), 0, Header);
}

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NCA_STATUS RPC2NCA_STATUS(RPC_STATUS status)
{
    switch (status)
    {
    case ERROR_INVALID_HANDLE:              return NCA_S_FAULT_CONTEXT_MISMATCH;
    case ERROR_OUTOFMEMORY:                 return NCA_S_FAULT_REMOTE_NO_MEMORY;
    case RPC_S_NOT_LISTENING:               return NCA_S_SERVER_TOO_BUSY;
    case RPC_S_UNKNOWN_IF:                  return NCA_S_UNK_IF;
    case RPC_S_SERVER_TOO_BUSY:             return NCA_S_SERVER_TOO_BUSY;
    case RPC_S_CALL_FAILED:                 return NCA_S_FAULT_UNSPEC;
    case RPC_S_CALL_FAILED_DNE:             return NCA_S_MANAGER_NOT_ENTERED;
    case RPC_S_PROTOCOL_ERROR:              return NCA_S_PROTO_ERROR;
    case RPC_S_UNSUPPORTED_TYPE:            return NCA_S_UNSUPPORTED_TYPE;
    case RPC_S_INVALID_TAG:                 return NCA_S_FAULT_INVALID_TAG;
    case RPC_S_INVALID_BOUND:               return NCA_S_FAULT_INVALID_BOUND;
    case RPC_S_PROCNUM_OUT_OF_RANGE:        return NCA_S_OP_RNG_ERROR;
    case RPC_X_SS_HANDLES_MISMATCH:         return NCA_S_FAULT_CONTEXT_MISMATCH;
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    case RPC_S_CALL_CANCELLED:              return NCA_S_FAULT_CANCEL;
    case RPC_S_COMM_FAILURE:                return NCA_S_COMM_FAILURE;
    case RPC_X_WRONG_PIPE_ORDER:            return NCA_S_FAULT_PIPE_ORDER;
    case RPC_X_PIPE_CLOSED:                 return NCA_S_FAULT_PIPE_CLOSED;
    case RPC_X_PIPE_DISCIPLINE_ERROR:       return NCA_S_FAULT_PIPE_DISCIPLINE;
    case RPC_X_PIPE_EMPTY:                  return NCA_S_FAULT_PIPE_EMPTY;
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    case STATUS_FLOAT_DIVIDE_BY_ZERO:       return NCA_S_FAULT_FP_DIV_ZERO;
    case STATUS_FLOAT_INVALID_OPERATION:    return NCA_S_FAULT_FP_ERROR;
    case STATUS_FLOAT_OVERFLOW:             return NCA_S_FAULT_FP_OVERFLOW;
    case STATUS_FLOAT_UNDERFLOW:            return NCA_S_FAULT_FP_UNDERFLOW;
    case STATUS_INTEGER_DIVIDE_BY_ZERO:     return NCA_S_FAULT_INT_DIV_BY_ZERO;
    case STATUS_INTEGER_OVERFLOW:           return NCA_S_FAULT_INT_OVERFLOW;
    default:                                return status;
    }
}

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static RPC_STATUS NCA2RPC_STATUS(NCA_STATUS status)
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{
    switch (status)
    {
    case NCA_S_COMM_FAILURE:            return RPC_S_COMM_FAILURE;
    case NCA_S_OP_RNG_ERROR:            return RPC_S_PROCNUM_OUT_OF_RANGE;
    case NCA_S_UNK_IF:                  return RPC_S_UNKNOWN_IF;
    case NCA_S_YOU_CRASHED:             return RPC_S_CALL_FAILED;
    case NCA_S_PROTO_ERROR:             return RPC_S_PROTOCOL_ERROR;
    case NCA_S_OUT_ARGS_TOO_BIG:        return ERROR_NOT_ENOUGH_SERVER_MEMORY;
    case NCA_S_SERVER_TOO_BUSY:         return RPC_S_SERVER_TOO_BUSY;
    case NCA_S_UNSUPPORTED_TYPE:        return RPC_S_UNSUPPORTED_TYPE;
    case NCA_S_FAULT_INT_DIV_BY_ZERO:   return RPC_S_ZERO_DIVIDE;
    case NCA_S_FAULT_ADDR_ERROR:        return RPC_S_ADDRESS_ERROR;
    case NCA_S_FAULT_FP_DIV_ZERO:       return RPC_S_FP_DIV_ZERO;
    case NCA_S_FAULT_FP_UNDERFLOW:      return RPC_S_FP_UNDERFLOW;
    case NCA_S_FAULT_FP_OVERFLOW:       return RPC_S_FP_OVERFLOW;
    case NCA_S_FAULT_INVALID_TAG:       return RPC_S_INVALID_TAG;
    case NCA_S_FAULT_INVALID_BOUND:     return RPC_S_INVALID_BOUND;
    case NCA_S_RPC_VERSION_MISMATCH:    return RPC_S_PROTOCOL_ERROR;
    case NCA_S_UNSPEC_REJECT:           return RPC_S_CALL_FAILED_DNE;
    case NCA_S_BAD_ACTID:               return RPC_S_CALL_FAILED_DNE;
    case NCA_S_WHO_ARE_YOU_FAILED:      return RPC_S_CALL_FAILED;
    case NCA_S_MANAGER_NOT_ENTERED:     return RPC_S_CALL_FAILED_DNE;
    case NCA_S_FAULT_CANCEL:            return RPC_S_CALL_CANCELLED;
    case NCA_S_FAULT_ILL_INST:          return RPC_S_ADDRESS_ERROR;
    case NCA_S_FAULT_FP_ERROR:          return RPC_S_FP_OVERFLOW;
    case NCA_S_FAULT_INT_OVERFLOW:      return RPC_S_ADDRESS_ERROR;
    case NCA_S_FAULT_UNSPEC:            return RPC_S_CALL_FAILED;
    case NCA_S_FAULT_PIPE_EMPTY:        return RPC_X_PIPE_EMPTY;
    case NCA_S_FAULT_PIPE_CLOSED:       return RPC_X_PIPE_CLOSED;
    case NCA_S_FAULT_PIPE_ORDER:        return RPC_X_WRONG_PIPE_ORDER;
    case NCA_S_FAULT_PIPE_DISCIPLINE:   return RPC_X_PIPE_DISCIPLINE_ERROR;
    case NCA_S_FAULT_PIPE_COMM_ERROR:   return RPC_S_COMM_FAILURE;
    case NCA_S_FAULT_PIPE_MEMORY:       return ERROR_OUTOFMEMORY;
    case NCA_S_FAULT_CONTEXT_MISMATCH:  return ERROR_INVALID_HANDLE;
    case NCA_S_FAULT_REMOTE_NO_MEMORY:  return ERROR_NOT_ENOUGH_SERVER_MEMORY;
    default:                            return status;
    }
}

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static RPC_STATUS RPCRT4_SecurePacket(RpcConnection *Connection,
    enum secure_packet_direction dir,
    RpcPktHdr *hdr, unsigned int hdr_size,
    unsigned char *stub_data, unsigned int stub_data_size,
    RpcAuthVerifier *auth_hdr,
    unsigned char *auth_value, unsigned int auth_value_size)
{
    SecBufferDesc message;
    SecBuffer buffers[4];
    SECURITY_STATUS sec_status;

    message.ulVersion = SECBUFFER_VERSION;
    message.cBuffers = sizeof(buffers)/sizeof(buffers[0]);
    message.pBuffers = buffers;

    buffers[0].cbBuffer = hdr_size;
    buffers[0].BufferType = SECBUFFER_DATA|SECBUFFER_READONLY_WITH_CHECKSUM;
    buffers[0].pvBuffer = hdr;
    buffers[1].cbBuffer = stub_data_size;
    buffers[1].BufferType = SECBUFFER_DATA;
    buffers[1].pvBuffer = stub_data;
    buffers[2].cbBuffer = sizeof(*auth_hdr);
    buffers[2].BufferType = SECBUFFER_DATA|SECBUFFER_READONLY_WITH_CHECKSUM;
    buffers[2].pvBuffer = auth_hdr;
    buffers[3].cbBuffer = auth_value_size;
    buffers[3].BufferType = SECBUFFER_TOKEN;
    buffers[3].pvBuffer = auth_value;

    if (dir == SECURE_PACKET_SEND)
    {
        if ((auth_hdr->auth_level == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(hdr))
        {
            sec_status = EncryptMessage(&Connection->ctx, 0, &message, 0 /* FIXME */);
            if (sec_status != SEC_E_OK)
            {
                ERR("EncryptMessage failed with 0x%08x\n", sec_status);
                return RPC_S_SEC_PKG_ERROR;
            }
        }
        else if (auth_hdr->auth_level != RPC_C_AUTHN_LEVEL_NONE)
        {
            sec_status = MakeSignature(&Connection->ctx, 0, &message, 0 /* FIXME */);
            if (sec_status != SEC_E_OK)
            {
                ERR("MakeSignature failed with 0x%08x\n", sec_status);
                return RPC_S_SEC_PKG_ERROR;
            }
        }
    }
    else if (dir == SECURE_PACKET_RECEIVE)
    {
        if ((auth_hdr->auth_level == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(hdr))
        {
            sec_status = DecryptMessage(&Connection->ctx, &message, 0 /* FIXME */, 0);
            if (sec_status != SEC_E_OK)
            {
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                ERR("DecryptMessage failed with 0x%08x\n", sec_status);
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                return RPC_S_SEC_PKG_ERROR;
            }
        }
        else if (auth_hdr->auth_level != RPC_C_AUTHN_LEVEL_NONE)
        {
            sec_status = VerifySignature(&Connection->ctx, &message, 0 /* FIXME */, NULL);
            if (sec_status != SEC_E_OK)
            {
                ERR("VerifySignature failed with 0x%08x\n", sec_status);
                return RPC_S_SEC_PKG_ERROR;
            }
        }
    }

    return RPC_S_OK;
}
         
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/***********************************************************************
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 *           RPCRT4_SendWithAuth (internal)
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 * 
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 * Transmit a packet with authorization data over connection in acceptable fragments.
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 */
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static RPC_STATUS RPCRT4_SendWithAuth(RpcConnection *Connection, RpcPktHdr *Header,
                                      void *Buffer, unsigned int BufferLength,
                                      const void *Auth, unsigned int AuthLength)
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{
  PUCHAR buffer_pos;
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  DWORD hdr_size;
  LONG count;
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  unsigned char *pkt;
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  LONG alen;
  RPC_STATUS status;
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  RPCRT4_SetThreadCurrentConnection(Connection);

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  buffer_pos = Buffer;
  /* The packet building functions save the packet header size, so we can use it. */
  hdr_size = Header->common.frag_len;
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  if (AuthLength)
    Header->common.auth_len = AuthLength;
  else if (Connection->AuthInfo && packet_has_auth_verifier(Header))
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  {
    if ((Connection->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(Header))
      Header->common.auth_len = Connection->encryption_auth_len;
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    else
      Header->common.auth_len = Connection->signature_auth_len;
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  }
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  else
    Header->common.auth_len = 0;
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  Header->common.flags |= RPC_FLG_FIRST;
  Header->common.flags &= ~RPC_FLG_LAST;
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  alen = RPC_AUTH_VERIFIER_LEN(&Header->common);

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  while (!(Header->common.flags & RPC_FLG_LAST)) {
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    unsigned char auth_pad_len = Header->common.auth_len ? ROUND_UP_AMOUNT(BufferLength, AUTH_ALIGNMENT) : 0;
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    unsigned int pkt_size = BufferLength + hdr_size + alen + auth_pad_len;
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    /* decide if we need to split the packet into fragments */
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   if (pkt_size <= Connection->MaxTransmissionSize) {
     Header->common.flags |= RPC_FLG_LAST;
     Header->common.frag_len = pkt_size;
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    } else {
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      auth_pad_len = 0;
      /* make sure packet payload will be a multiple of 16 */
      Header->common.frag_len =
        ((Connection->MaxTransmissionSize - hdr_size - alen) & ~(AUTH_ALIGNMENT-1)) +
        hdr_size + alen;
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    }

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    pkt = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, Header->common.frag_len);

    memcpy(pkt, Header, hdr_size);
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    /* fragment consisted of header only and is the last one */
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    if (hdr_size == Header->common.frag_len)
      goto write;

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    memcpy(pkt + hdr_size, buffer_pos, Header->common.frag_len - hdr_size - auth_pad_len - alen);
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    /* add the authorization info */
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    if (Connection->AuthInfo && packet_has_auth_verifier(Header))
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    {
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      RpcAuthVerifier *auth_hdr = (RpcAuthVerifier *)&pkt[Header->common.frag_len - alen];
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      auth_hdr->auth_type = Connection->AuthInfo->AuthnSvc;
      auth_hdr->auth_level = Connection->AuthInfo->AuthnLevel;
      auth_hdr->auth_pad_length = auth_pad_len;
      auth_hdr->auth_reserved = 0;
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      /* a unique number... */
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      auth_hdr->auth_context_id = (unsigned long)Connection;

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      if (AuthLength)
        memcpy(auth_hdr + 1, Auth, AuthLength);
      else
      {
        status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_SEND,
            (RpcPktHdr *)pkt, hdr_size,
            pkt + hdr_size, Header->common.frag_len - hdr_size - alen,
            auth_hdr,
            (unsigned char *)(auth_hdr + 1), Header->common.auth_len);
        if (status != RPC_S_OK)
        {
          HeapFree(GetProcessHeap(), 0, pkt);
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          RPCRT4_SetThreadCurrentConnection(NULL);
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          return status;
        }
      }
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    }

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write:
    count = rpcrt4_conn_write(Connection, pkt, Header->common.frag_len);
    HeapFree(GetProcessHeap(), 0, pkt);
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    if (count<0) {
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      WARN("rpcrt4_conn_write failed (auth)\n");
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      RPCRT4_SetThreadCurrentConnection(NULL);
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      return RPC_S_CALL_FAILED;
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    }

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    buffer_pos += Header->common.frag_len - hdr_size - alen - auth_pad_len;
    BufferLength -= Header->common.frag_len - hdr_size - alen - auth_pad_len;
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    Header->common.flags &= ~RPC_FLG_FIRST;
  }

546
  RPCRT4_SetThreadCurrentConnection(NULL);
547 548 549
  return RPC_S_OK;
}

550
/***********************************************************************
551 552 553
 *           RPCRT4_ClientAuthorize (internal)
 *
 * Authorize a client connection. A NULL in param signifies a new connection.
554
 */
555 556
static RPC_STATUS RPCRT4_ClientAuthorize(RpcConnection *conn, SecBuffer *in,
                                         SecBuffer *out)
557 558 559
{
  SECURITY_STATUS r;
  SecBufferDesc out_desc;
560
  SecBufferDesc inp_desc;
561 562
  SecPkgContext_Sizes secctx_sizes;
  BOOL continue_needed;
563 564 565 566 567 568 569
  ULONG context_req = ISC_REQ_CONNECTION | ISC_REQ_USE_DCE_STYLE |
                      ISC_REQ_MUTUAL_AUTH | ISC_REQ_DELEGATE;

  if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_INTEGRITY)
    context_req |= ISC_REQ_INTEGRITY;
  else if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
    context_req |= ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY;
570 571

  out->BufferType = SECBUFFER_TOKEN;
572
  out->cbBuffer = conn->AuthInfo->cbMaxToken;
573
  out->pvBuffer = HeapAlloc(GetProcessHeap(), 0, out->cbBuffer);
574
  if (!out->pvBuffer) return ERROR_OUTOFMEMORY;
575 576 577 578 579

  out_desc.ulVersion = 0;
  out_desc.cBuffers = 1;
  out_desc.pBuffers = out;

580 581 582 583
  inp_desc.cBuffers = 1;
  inp_desc.pBuffers = in;
  inp_desc.ulVersion = 0;

584 585 586 587
  r = InitializeSecurityContextW(&conn->AuthInfo->cred, in ? &conn->ctx : NULL,
        in ? NULL : conn->AuthInfo->server_principal_name, context_req, 0,
        SECURITY_NETWORK_DREP, in ? &inp_desc : NULL, 0, &conn->ctx,
        &out_desc, &conn->attr, &conn->exp);
588 589 590
  if (FAILED(r))
  {
      WARN("InitializeSecurityContext failed with error 0x%08x\n", r);
591
      goto failed;
592
  }
593

594
  TRACE("r = 0x%08x, attr = 0x%08x\n", r, conn->attr);
595 596
  continue_needed = ((r == SEC_I_CONTINUE_NEEDED) ||
                     (r == SEC_I_COMPLETE_AND_CONTINUE));
597 598 599 600 601 602 603 604

  if ((r == SEC_I_COMPLETE_NEEDED) || (r == SEC_I_COMPLETE_AND_CONTINUE))
  {
      TRACE("complete needed\n");
      r = CompleteAuthToken(&conn->ctx, &out_desc);
      if (FAILED(r))
      {
          WARN("CompleteAuthToken failed with error 0x%08x\n", r);
605
          goto failed;
606 607 608
      }
  }

609
  TRACE("cbBuffer = %d\n", out->cbBuffer);
610

611 612 613 614 615 616 617 618 619 620 621 622
  if (!continue_needed)
  {
      r = QueryContextAttributesA(&conn->ctx, SECPKG_ATTR_SIZES, &secctx_sizes);
      if (FAILED(r))
      {
          WARN("QueryContextAttributes failed with error 0x%08x\n", r);
          goto failed;
      }
      conn->signature_auth_len = secctx_sizes.cbMaxSignature;
      conn->encryption_auth_len = secctx_sizes.cbSecurityTrailer;
  }

623
  return RPC_S_OK;
624 625 626 627 628

failed:
  HeapFree(GetProcessHeap(), 0, out->pvBuffer);
  out->pvBuffer = NULL;
  return ERROR_ACCESS_DENIED; /* FIXME: is this correct? */
629 630 631 632 633
}

/***********************************************************************
 *           RPCRT4_AuthorizeBinding (internal)
 */
634 635
RPC_STATUS RPCRT4_AuthorizeConnection(RpcConnection* conn, BYTE *challenge,
                                      ULONG count)
636 637 638 639 640
{
  SecBuffer inp, out;
  RpcPktHdr *resp_hdr;
  RPC_STATUS status;

641
  TRACE("challenge %s, %d bytes\n", challenge, count);
642 643 644 645 646

  inp.BufferType = SECBUFFER_TOKEN;
  inp.pvBuffer = challenge;
  inp.cbBuffer = count;

647 648
  status = RPCRT4_ClientAuthorize(conn, &inp, &out);
  if (status) return status;
649 650 651 652 653

  resp_hdr = RPCRT4_BuildAuthHeader(NDR_LOCAL_DATA_REPRESENTATION);
  if (!resp_hdr)
    return E_OUTOFMEMORY;

654
  status = RPCRT4_SendWithAuth(conn, resp_hdr, NULL, 0, out.pvBuffer, out.cbBuffer);
655

656
  HeapFree(GetProcessHeap(), 0, out.pvBuffer);
657 658 659 660 661
  RPCRT4_FreeHeader(resp_hdr);

  return status;
}

662 663 664 665 666 667 668 669
/***********************************************************************
 *           RPCRT4_Send (internal)
 * 
 * Transmit a packet over connection in acceptable fragments.
 */
RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
                       void *Buffer, unsigned int BufferLength)
{
670 671 672
  RPC_STATUS r;
  SecBuffer out;

673
  if (!Connection->AuthInfo || SecIsValidHandle(&Connection->ctx))
674
  {
675
    return RPCRT4_SendWithAuth(Connection, Header, Buffer, BufferLength, NULL, 0);
676 677 678
  }

  /* tack on a negotiate packet */
679 680 681
  r = RPCRT4_ClientAuthorize(Connection, NULL, &out);
  if (r == RPC_S_OK)
  {
682
    r = RPCRT4_SendWithAuth(Connection, Header, Buffer, BufferLength, out.pvBuffer, out.cbBuffer);
683 684
    HeapFree(GetProcessHeap(), 0, out.pvBuffer);
  }
685 686

  return r;
687 688
}

689
/* validates version and frag_len fields */
690
static RPC_STATUS RPCRT4_ValidateCommonHeader(const RpcPktCommonHdr *hdr)
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
{
  DWORD hdr_length;

  /* verify if the header really makes sense */
  if (hdr->rpc_ver != RPC_VER_MAJOR ||
      hdr->rpc_ver_minor != RPC_VER_MINOR)
  {
    WARN("unhandled packet version\n");
    return RPC_S_PROTOCOL_ERROR;
  }

  hdr_length = RPCRT4_GetHeaderSize((const RpcPktHdr*)hdr);
  if (hdr_length == 0)
  {
    WARN("header length == 0\n");
    return RPC_S_PROTOCOL_ERROR;
  }

  if (hdr->frag_len < hdr_length)
  {
    WARN("bad frag length %d\n", hdr->frag_len);
    return RPC_S_PROTOCOL_ERROR;
  }

  return RPC_S_OK;
}

718
/***********************************************************************
719
 *           RPCRT4_receive_fragment (internal)
720
 * 
721
 * Receive a fragment from a connection.
722
 */
723
static RPC_STATUS RPCRT4_receive_fragment(RpcConnection *Connection, RpcPktHdr **Header, void **Payload)
724 725
{
  RPC_STATUS status;
726 727
  DWORD hdr_length;
  LONG dwRead;
728 729 730
  RpcPktCommonHdr common_hdr;

  *Header = NULL;
731
  *Payload = NULL;
732

733
  TRACE("(%p, %p, %p)\n", Connection, Header, Payload);
734

735
  /* read packet common header */
736
  dwRead = rpcrt4_conn_read(Connection, &common_hdr, sizeof(common_hdr));
737
  if (dwRead != sizeof(common_hdr)) {
738
    WARN("Short read of header, %d bytes\n", dwRead);
739
    status = RPC_S_CALL_FAILED;
740 741 742
    goto fail;
  }

743 744
  status = RPCRT4_ValidateCommonHeader(&common_hdr);
  if (status != RPC_S_OK) goto fail;
745 746 747

  hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
  if (hdr_length == 0) {
748
    WARN("header length == 0\n");
749 750 751 752 753 754 755 756
    status = RPC_S_PROTOCOL_ERROR;
    goto fail;
  }

  *Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
  memcpy(*Header, &common_hdr, sizeof(common_hdr));

  /* read the rest of packet header */
757
  dwRead = rpcrt4_conn_read(Connection, &(*Header)->common + 1, hdr_length - sizeof(common_hdr));
758
  if (dwRead != hdr_length - sizeof(common_hdr)) {
759
    WARN("bad header length, %d bytes, hdr_length %d\n", dwRead, hdr_length);
760
    status = RPC_S_CALL_FAILED;
761 762 763
    goto fail;
  }

764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797
  if (common_hdr.frag_len - hdr_length)
  {
    *Payload = HeapAlloc(GetProcessHeap(), 0, common_hdr.frag_len - hdr_length);
    if (!*Payload)
    {
      status = RPC_S_OUT_OF_RESOURCES;
      goto fail;
    }

    dwRead = rpcrt4_conn_read(Connection, *Payload, common_hdr.frag_len - hdr_length);
    if (dwRead != common_hdr.frag_len - hdr_length)
    {
      WARN("bad data length, %d/%d\n", dwRead, common_hdr.frag_len - hdr_length);
      status = RPC_S_CALL_FAILED;
      goto fail;
    }
  }
  else
    *Payload = NULL;

  /* success */
  status = RPC_S_OK;

fail:
  if (status != RPC_S_OK) {
    RPCRT4_FreeHeader(*Header);
    *Header = NULL;
    HeapFree(GetProcessHeap(), 0, *Payload);
    *Payload = NULL;
  }
  return status;
}

/***********************************************************************
798
 *           RPCRT4_ReceiveWithAuth (internal)
799
 *
800 801
 * Receive a packet from connection, merge the fragments and return the auth
 * data.
802
 */
803 804 805 806
RPC_STATUS RPCRT4_ReceiveWithAuth(RpcConnection *Connection, RpcPktHdr **Header,
                                  PRPC_MESSAGE pMsg,
                                  unsigned char **auth_data_out,
                                  unsigned long *auth_length_out)
807 808 809 810 811 812
{
  RPC_STATUS status;
  DWORD hdr_length;
  unsigned short first_flag;
  unsigned long data_length;
  unsigned long buffer_length;
813
  unsigned long auth_length = 0;
814
  unsigned char *auth_data = NULL;
815
  RpcPktHdr *CurrentHeader = NULL;
816 817 818
  void *payload = NULL;

  *Header = NULL;
819
  pMsg->Buffer = NULL;
820

821
  TRACE("(%p, %p, %p, %p)\n", Connection, Header, pMsg, auth_data_out);
822 823 824 825 826 827 828 829

  RPCRT4_SetThreadCurrentConnection(Connection);

  status = RPCRT4_receive_fragment(Connection, Header, &payload);
  if (status != RPC_S_OK) goto fail;

  hdr_length = RPCRT4_GetHeaderSize(*Header);

830
  /* read packet body */
831
  switch ((*Header)->common.ptype) {
832 833 834 835 836 837 838
  case PKT_RESPONSE:
    pMsg->BufferLength = (*Header)->response.alloc_hint;
    break;
  case PKT_REQUEST:
    pMsg->BufferLength = (*Header)->request.alloc_hint;
    break;
  default:
839
    pMsg->BufferLength = (*Header)->common.frag_len - hdr_length - RPC_AUTH_VERIFIER_LEN(&(*Header)->common);
840
  }
841 842 843

  TRACE("buffer length = %u\n", pMsg->BufferLength);

844 845 846 847 848 849
  pMsg->Buffer = I_RpcAllocate(pMsg->BufferLength);
  if (!pMsg->Buffer)
  {
    status = ERROR_OUTOFMEMORY;
    goto fail;
  }
850 851

  first_flag = RPC_FLG_FIRST;
852
  auth_length = (*Header)->common.auth_len;
853
  if (auth_length) {
854
    auth_data = HeapAlloc(GetProcessHeap(), 0, RPC_AUTH_VERIFIER_LEN(&(*Header)->common));
855
    if (!auth_data) {
856
      status = RPC_S_OUT_OF_RESOURCES;
857 858 859
      goto fail;
    }
  }
860
  CurrentHeader = *Header;
861
  buffer_length = 0;
862
  while (TRUE)
863
  {
864
    unsigned int header_auth_len = RPC_AUTH_VERIFIER_LEN(&CurrentHeader->common);
865 866 867

    /* verify header fields */

868 869
    if ((CurrentHeader->common.frag_len < hdr_length) ||
        (CurrentHeader->common.frag_len - hdr_length < header_auth_len)) {
870
      WARN("frag_len %d too small for hdr_length %d and auth_len %d\n",
871
        CurrentHeader->common.frag_len, hdr_length, CurrentHeader->common.auth_len);
872 873 874 875
      status = RPC_S_PROTOCOL_ERROR;
      goto fail;
    }

876
    if (CurrentHeader->common.auth_len != auth_length) {
877
      WARN("auth_len header field changed from %ld to %d\n",
878
        auth_length, CurrentHeader->common.auth_len);
879 880 881 882
      status = RPC_S_PROTOCOL_ERROR;
      goto fail;
    }

883
    if ((CurrentHeader->common.flags & RPC_FLG_FIRST) != first_flag) {
884
      TRACE("invalid packet flags\n");
885 886 887 888
      status = RPC_S_PROTOCOL_ERROR;
      goto fail;
    }

889
    data_length = CurrentHeader->common.frag_len - hdr_length - header_auth_len;
890 891 892 893 894 895 896 897
    if (data_length + buffer_length > pMsg->BufferLength) {
      TRACE("allocation hint exceeded, new buffer length = %ld\n",
        data_length + buffer_length);
      pMsg->BufferLength = data_length + buffer_length;
      status = I_RpcReAllocateBuffer(pMsg);
      if (status != RPC_S_OK) goto fail;
    }

898
    memcpy((unsigned char *)pMsg->Buffer + buffer_length, payload, data_length);
899

900
    if (header_auth_len) {
901 902
      if (header_auth_len < sizeof(RpcAuthVerifier) ||
          header_auth_len > RPC_AUTH_VERIFIER_LEN(&(*Header)->common)) {
903 904 905 906 907
        WARN("bad auth verifier length %d\n", header_auth_len);
        status = RPC_S_PROTOCOL_ERROR;
        goto fail;
      }

908 909 910 911 912
      /* FIXME: we should accumulate authentication data for the bind,
       * bind_ack, alter_context and alter_context_response if necessary.
       * however, the details of how this is done is very sketchy in the
       * DCE/RPC spec. for all other packet types that have authentication
       * verifier data then it is just duplicated in all the fragments */
913
      memcpy(auth_data, (unsigned char *)payload + data_length, header_auth_len);
914 915 916

      /* these packets are handled specially, not by the generic SecurePacket
       * function */
917
      if (!auth_data_out && SecIsValidHandle(&Connection->ctx))
918
      {
919
        status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_RECEIVE,
920
            CurrentHeader, hdr_length,
921 922
            (unsigned char *)pMsg->Buffer + buffer_length, data_length,
            (RpcAuthVerifier *)auth_data,
923
            auth_data + sizeof(RpcAuthVerifier),
924
            header_auth_len - sizeof(RpcAuthVerifier));
925 926
        if (status != RPC_S_OK) goto fail;
      }
927 928
    }

929
    buffer_length += data_length;
930
    if (!(CurrentHeader->common.flags & RPC_FLG_LAST)) {
931 932
      TRACE("next header\n");

933 934 935 936
      if (*Header != CurrentHeader)
      {
          RPCRT4_FreeHeader(CurrentHeader);
          CurrentHeader = NULL;
937
      }
938 939 940 941 942
      HeapFree(GetProcessHeap(), 0, payload);
      payload = NULL;

      status = RPCRT4_receive_fragment(Connection, &CurrentHeader, &payload);
      if (status != RPC_S_OK) goto fail;
943 944

      first_flag = 0;
945 946
    } else {
      break;
947 948
    }
  }
949
  pMsg->BufferLength = buffer_length;
950 951 952 953 954

  /* success */
  status = RPC_S_OK;

fail:
955
  RPCRT4_SetThreadCurrentConnection(NULL);
956 957
  if (CurrentHeader != *Header)
    RPCRT4_FreeHeader(CurrentHeader);
958
  if (status != RPC_S_OK) {
959 960
    I_RpcFree(pMsg->Buffer);
    pMsg->Buffer = NULL;
961 962 963
    RPCRT4_FreeHeader(*Header);
    *Header = NULL;
  }
964 965 966 967 968 969
  if (auth_data_out && status == RPC_S_OK) {
    *auth_length_out = auth_length;
    *auth_data_out = auth_data;
  }
  else
    HeapFree(GetProcessHeap(), 0, auth_data);
970
  HeapFree(GetProcessHeap(), 0, payload);
971 972 973
  return status;
}

974 975 976 977 978 979 980 981 982 983 984
/***********************************************************************
 *           RPCRT4_Receive (internal)
 *
 * Receive a packet from connection and merge the fragments.
 */
RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
                          PRPC_MESSAGE pMsg)
{
    return RPCRT4_ReceiveWithAuth(Connection, Header, pMsg, NULL, NULL);
}

985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
/***********************************************************************
 *           I_RpcNegotiateTransferSyntax [RPCRT4.@]
 *
 * Negotiates the transfer syntax used by a client connection by connecting
 * to the server.
 *
 * PARAMS
 *  pMsg   [I] RPC Message structure.
 *  pAsync [I] Asynchronous state to set.
 *
 * RETURNS
 *  Success: RPC_S_OK.
 *  Failure: Any error code.
 */
RPC_STATUS WINAPI I_RpcNegotiateTransferSyntax(PRPC_MESSAGE pMsg)
{
  RpcBinding* bind = (RpcBinding*)pMsg->Handle;
  RpcConnection* conn;
  RPC_STATUS status = RPC_S_OK;

  TRACE("(%p)\n", pMsg);

  if (!bind || bind->server)
1008 1009
  {
    ERR("no binding\n");
1010
    return RPC_S_INVALID_BINDING;
1011
  }
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029

  /* if we already have a connection, we don't need to negotiate again */
  if (!pMsg->ReservedForRuntime)
  {
    RPC_CLIENT_INTERFACE *cif = pMsg->RpcInterfaceInformation;
    if (!cif) return RPC_S_INTERFACE_NOT_FOUND;

    if (!bind->Endpoint || !bind->Endpoint[0])
    {
      TRACE("automatically resolving partially bound binding\n");
      status = RpcEpResolveBinding(bind, cif);
      if (status != RPC_S_OK) return status;
    }

    status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
                                &cif->InterfaceId);

    if (status == RPC_S_OK)
1030
    {
1031
      pMsg->ReservedForRuntime = conn;
1032 1033
      RPCRT4_AddRefBinding(bind);
    }
1034 1035 1036 1037 1038
  }

  return status;
}

1039 1040
/***********************************************************************
 *           I_RpcGetBuffer [RPCRT4.@]
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
 *
 * Allocates a buffer for use by I_RpcSend or I_RpcSendReceive and binds to the
 * server interface.
 *
 * PARAMS
 *  pMsg [I/O] RPC message information.
 *
 * RETURNS
 *  Success: RPC_S_OK.
 *  Failure: RPC_S_INVALID_BINDING if pMsg->Handle is invalid.
 *           RPC_S_SERVER_UNAVAILABLE if unable to connect to server.
 *           ERROR_OUTOFMEMORY if buffer allocation failed.
 *
 * NOTES
 *  The pMsg->BufferLength field determines the size of the buffer to allocate,
 *  in bytes.
 *
 *  Use I_RpcFreeBuffer() to unbind from the server and free the message buffer.
 *
 * SEE ALSO
 *  I_RpcFreeBuffer(), I_RpcSend(), I_RpcReceive(), I_RpcSendReceive().
1062 1063 1064
 */
RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
{
1065 1066 1067
  RPC_STATUS status;
  RpcBinding* bind = (RpcBinding*)pMsg->Handle;

1068
  TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
1069

1070
  if (!bind)
1071 1072
  {
    ERR("no binding\n");
1073
    return RPC_S_INVALID_BINDING;
1074
  }
1075 1076

  pMsg->Buffer = I_RpcAllocate(pMsg->BufferLength);
1077
  TRACE("Buffer=%p\n", pMsg->Buffer);
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091

  if (!pMsg->Buffer)
    return ERROR_OUTOFMEMORY;

  if (!bind->server)
  {
    status = I_RpcNegotiateTransferSyntax(pMsg);
    if (status != RPC_S_OK)
      I_RpcFree(pMsg->Buffer);
  }
  else
    status = RPC_S_OK;

  return status;
1092 1093
}

1094 1095 1096 1097 1098 1099 1100 1101 1102
/***********************************************************************
 *           I_RpcReAllocateBuffer (internal)
 */
static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg)
{
  TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
  pMsg->Buffer = HeapReAlloc(GetProcessHeap(), 0, pMsg->Buffer, pMsg->BufferLength);

  TRACE("Buffer=%p\n", pMsg->Buffer);
1103
  return pMsg->Buffer ? RPC_S_OK : ERROR_OUTOFMEMORY;
1104 1105
}

1106 1107
/***********************************************************************
 *           I_RpcFreeBuffer [RPCRT4.@]
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
 *
 * Frees a buffer allocated by I_RpcGetBuffer or I_RpcReceive and unbinds from
 * the server interface.
 *
 * PARAMS
 *  pMsg [I/O] RPC message information.
 *
 * RETURNS
 *  RPC_S_OK.
 *
 * SEE ALSO
 *  I_RpcGetBuffer(), I_RpcReceive().
1120 1121 1122
 */
RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
{
1123 1124
  RpcBinding* bind = (RpcBinding*)pMsg->Handle;

1125
  TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
1126

1127 1128 1129 1130 1131
  if (!bind)
  {
    ERR("no binding\n");
    return RPC_S_INVALID_BINDING;
  }
1132 1133 1134 1135 1136

  if (pMsg->ReservedForRuntime)
  {
    RpcConnection *conn = pMsg->ReservedForRuntime;
    RPCRT4_CloseBinding(bind, conn);
1137
    RPCRT4_ReleaseBinding(bind);
1138 1139 1140
    pMsg->ReservedForRuntime = NULL;
  }
  I_RpcFree(pMsg->Buffer);
1141
  return RPC_S_OK;
1142 1143
}

1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
static void CALLBACK async_apc_notifier_proc(ULONG_PTR ulParam)
{
    RPC_ASYNC_STATE *state = (RPC_ASYNC_STATE *)ulParam;
    state->u.APC.NotificationRoutine(state, NULL, state->Event);
}

static DWORD WINAPI async_notifier_proc(LPVOID p)
{
    RpcConnection *conn = p;
    RPC_ASYNC_STATE *state = conn->async_state;

1155
    if (state && conn->ops->wait_for_incoming_data(conn) != -1)
1156 1157 1158 1159 1160
    {
        state->Event = RpcCallComplete;
        switch (state->NotificationType)
        {
        case RpcNotificationTypeEvent:
1161
            TRACE("RpcNotificationTypeEvent %p\n", state->u.hEvent);
1162 1163 1164
            SetEvent(state->u.hEvent);
            break;
        case RpcNotificationTypeApc:
1165
            TRACE("RpcNotificationTypeApc %p\n", state->u.APC.hThread);
1166 1167 1168
            QueueUserAPC(async_apc_notifier_proc, state->u.APC.hThread, (ULONG_PTR)state);
            break;
        case RpcNotificationTypeIoc:
1169 1170 1171
            TRACE("RpcNotificationTypeIoc %p, 0x%x, 0x%lx, %p\n",
                state->u.IOC.hIOPort, state->u.IOC.dwNumberOfBytesTransferred,
                state->u.IOC.dwCompletionKey, state->u.IOC.lpOverlapped);
1172 1173 1174 1175 1176 1177
            PostQueuedCompletionStatus(state->u.IOC.hIOPort,
                state->u.IOC.dwNumberOfBytesTransferred,
                state->u.IOC.dwCompletionKey,
                state->u.IOC.lpOverlapped);
            break;
        case RpcNotificationTypeHwnd:
1178 1179
            TRACE("RpcNotificationTypeHwnd %p 0x%x\n", state->u.HWND.hWnd,
                state->u.HWND.Msg);
1180 1181 1182
            PostMessageW(state->u.HWND.hWnd, state->u.HWND.Msg, 0, 0);
            break;
        case RpcNotificationTypeCallback:
1183
            TRACE("RpcNotificationTypeCallback %p\n", state->u.NotificationRoutine);
1184 1185 1186
            state->u.NotificationRoutine(state, NULL, state->Event);
            break;
        case RpcNotificationTypeNone:
1187 1188
            TRACE("RpcNotificationTypeNone\n");
            break;
1189
        default:
1190
            FIXME("unknown NotificationType: %d/0x%x\n", state->NotificationType, state->NotificationType);
1191 1192 1193 1194 1195 1196 1197
            break;
        }
    }

    return 0;
}

1198 1199
/***********************************************************************
 *           I_RpcSend [RPCRT4.@]
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
 *
 * Sends a message to the server.
 *
 * PARAMS
 *  pMsg [I/O] RPC message information.
 *
 * RETURNS
 *  Unknown.
 *
 * NOTES
 *  The buffer must have been allocated with I_RpcGetBuffer().
 *
 * SEE ALSO
 *  I_RpcGetBuffer(), I_RpcReceive(), I_RpcSendReceive().
1214 1215 1216 1217
 */
RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
{
  RpcBinding* bind = (RpcBinding*)pMsg->Handle;
1218
  RpcConnection* conn;
1219
  RPC_STATUS status;
1220
  RpcPktHdr *hdr;
1221 1222

  TRACE("(%p)\n", pMsg);
1223
  if (!bind || bind->server || !pMsg->ReservedForRuntime) return RPC_S_INVALID_BINDING;
1224

1225
  conn = pMsg->ReservedForRuntime;
1226

1227
  hdr = RPCRT4_BuildRequestHeader(pMsg->DataRepresentation,
1228 1229
                                  pMsg->BufferLength,
                                  pMsg->ProcNum & ~RPC_FLAGS_VALID_BIT,
1230 1231 1232 1233
                                  &bind->ObjectUuid);
  if (!hdr)
    return ERROR_OUTOFMEMORY;
  hdr->common.call_id = conn->NextCallId++;
1234

1235 1236 1237 1238
  status = RPCRT4_Send(conn, hdr, pMsg->Buffer, pMsg->BufferLength);

  RPCRT4_FreeHeader(hdr);

1239 1240 1241 1242 1243 1244
  if (status == RPC_S_OK && pMsg->RpcFlags & RPC_BUFFER_ASYNC)
  {
    if (!QueueUserWorkItem(async_notifier_proc, conn, WT_EXECUTEDEFAULT | WT_EXECUTELONGFUNCTION))
        status = RPC_S_OUT_OF_RESOURCES;
  }

1245
  return status;
1246 1247
}

1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
/* is this status something that the server can't recover from? */
static inline BOOL is_hard_error(RPC_STATUS status)
{
    switch (status)
    {
    case 0: /* user-defined fault */
    case ERROR_ACCESS_DENIED:
    case ERROR_INVALID_PARAMETER:
    case RPC_S_PROTOCOL_ERROR:
    case RPC_S_CALL_FAILED:
    case RPC_S_CALL_FAILED_DNE:
1259
    case RPC_S_SEC_PKG_ERROR:
1260 1261 1262 1263 1264 1265
        return TRUE;
    default:
        return FALSE;
    }
}

1266 1267 1268 1269 1270 1271 1272
/***********************************************************************
 *           I_RpcReceive [RPCRT4.@]
 */
RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
{
  RpcBinding* bind = (RpcBinding*)pMsg->Handle;
  RPC_STATUS status;
1273
  RpcPktHdr *hdr = NULL;
1274
  RpcConnection *conn;
1275 1276

  TRACE("(%p)\n", pMsg);
1277
  if (!bind || bind->server || !pMsg->ReservedForRuntime) return RPC_S_INVALID_BINDING;
1278

1279
  conn = pMsg->ReservedForRuntime;
1280 1281
  status = RPCRT4_Receive(conn, &hdr, pMsg);
  if (status != RPC_S_OK) {
1282
    WARN("receive failed with error %x\n", status);
1283 1284
    goto fail;
  }
1285

1286 1287
  switch (hdr->common.ptype) {
  case PKT_RESPONSE:
1288
    break;
1289
  case PKT_FAULT:
1290
    ERR ("we got fault packet with status 0x%lx\n", hdr->fault.status);
1291
    status = NCA2RPC_STATUS(hdr->fault.status);
1292 1293 1294
    if (is_hard_error(status))
        goto fail;
    break;
1295
  default:
1296
    WARN("bad packet type %d\n", hdr->common.ptype);
1297
    status = RPC_S_PROTOCOL_ERROR;
1298
    goto fail;
1299
  }
1300 1301

  /* success */
1302 1303
  RPCRT4_FreeHeader(hdr);
  return status;
1304

1305
fail:
1306
  RPCRT4_FreeHeader(hdr);
1307
  RPCRT4_DestroyConnection(conn);
1308
  pMsg->ReservedForRuntime = NULL;
1309
  return status;
1310 1311 1312 1313
}

/***********************************************************************
 *           I_RpcSendReceive [RPCRT4.@]
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
 *
 * Sends a message to the server and receives the response.
 *
 * PARAMS
 *  pMsg [I/O] RPC message information.
 *
 * RETURNS
 *  Success: RPC_S_OK.
 *  Failure: Any error code.
 *
 * NOTES
 *  The buffer must have been allocated with I_RpcGetBuffer().
 *
 * SEE ALSO
 *  I_RpcGetBuffer(), I_RpcSend(), I_RpcReceive().
1329 1330 1331 1332
 */
RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
{
  RPC_STATUS status;
1333
  void *original_buffer;
1334 1335

  TRACE("(%p)\n", pMsg);
1336

1337
  original_buffer = pMsg->Buffer;
1338 1339 1340
  status = I_RpcSend(pMsg);
  if (status == RPC_S_OK)
    status = I_RpcReceive(pMsg);
1341 1342
  /* free the buffer replaced by a new buffer in I_RpcReceive */
  if (status == RPC_S_OK)
1343
    I_RpcFree(original_buffer);
1344 1345
  return status;
}
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362

/***********************************************************************
 *           I_RpcAsyncSetHandle [RPCRT4.@]
 *
 * Sets the asynchronous state of the handle contained in the RPC message
 * structure.
 *
 * PARAMS
 *  pMsg   [I] RPC Message structure.
 *  pAsync [I] Asynchronous state to set.
 *
 * RETURNS
 *  Success: RPC_S_OK.
 *  Failure: Any error code.
 */
RPC_STATUS WINAPI I_RpcAsyncSetHandle(PRPC_MESSAGE pMsg, PRPC_ASYNC_STATE pAsync)
{
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
    RpcBinding* bind = (RpcBinding*)pMsg->Handle;
    RpcConnection *conn;

    TRACE("(%p, %p)\n", pMsg, pAsync);

    if (!bind || bind->server || !pMsg->ReservedForRuntime) return RPC_S_INVALID_BINDING;

    conn = pMsg->ReservedForRuntime;
    conn->async_state = pAsync;

    return RPC_S_OK;
1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393
}

/***********************************************************************
 *           I_RpcAsyncAbortCall [RPCRT4.@]
 *
 * Aborts an asynchronous call.
 *
 * PARAMS
 *  pAsync        [I] Asynchronous state.
 *  ExceptionCode [I] Exception code.
 *
 * RETURNS
 *  Success: RPC_S_OK.
 *  Failure: Any error code.
 */
RPC_STATUS WINAPI I_RpcAsyncAbortCall(PRPC_ASYNC_STATE pAsync, ULONG ExceptionCode)
{
    FIXME("(%p, %d): stub\n", pAsync, ExceptionCode);
    return RPC_S_INVALID_ASYNC_HANDLE;
}