sandbox/win/src/resolver.cc

   1 // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "sandbox/win/src/resolver.h"
   6
   7 #include "base/win/pe_image.h"
   8 #include "sandbox/win/src/sandbox_nt_util.h"
   9
  10 namespace sandbox {
  11
  12 NTSTATUS ResolverThunk::Init(const void* target_module,
  13                              const void* interceptor_module,
  14                              const char* target_name,
  15                              const char* interceptor_name,
  16                              const void* interceptor_entry_point,
  17                              void* thunk_storage,
  18                              size_t storage_bytes) {
  19   if (NULL == thunk_storage || 0 == storage_bytes ||
  20       NULL == target_module || NULL == target_name)
  21     return STATUS_INVALID_PARAMETER;
  22
  23   if (storage_bytes < GetThunkSize())
  24     return STATUS_BUFFER_TOO_SMALL;
  25
  26   NTSTATUS ret = STATUS_SUCCESS;
  27   if (NULL == interceptor_entry_point) {
  28     ret = ResolveInterceptor(interceptor_module, interceptor_name,
  29                              &interceptor_entry_point);
  30     if (!NT_SUCCESS(ret))
  31       return ret;
  32   }
  33
  34   ret = ResolveTarget(target_module, target_name, &target_);
  35   if (!NT_SUCCESS(ret))
  36     return ret;
  37
  38   interceptor_ = interceptor_entry_point;
  39
  40   return ret;
  41 }
  42
  43 NTSTATUS ResolverThunk::ResolveInterceptor(const void* interceptor_module,
  44                                            const char* interceptor_name,
  45                                            const void** address) {
  46   DCHECK_NT(address);
  47   if (!interceptor_module)
  48     return STATUS_INVALID_PARAMETER;
  49
  50   base::win::PEImage pe(interceptor_module);
  51   if (!pe.VerifyMagic())
  52     return STATUS_INVALID_IMAGE_FORMAT;
  53
  54   *address = pe.GetProcAddress(interceptor_name);
  55
  56   if (!(*address))
  57     return STATUS_PROCEDURE_NOT_FOUND;
  58
  59   return STATUS_SUCCESS;
  60 }
  61
  62 }  // namespace sandbox