sandbox/win/src/service_resolver.h

   1 // Copyright (c) 2012 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 #ifndef SANDBOX_SRC_SERVICE_RESOLVER_H__
   6 #define SANDBOX_SRC_SERVICE_RESOLVER_H__
   7
   8 #include "sandbox/win/src/nt_internals.h"
   9 #include "sandbox/win/src/resolver.h"
  10
  11 namespace sandbox {
  12
  13 // This is the concrete resolver used to perform service-call type functions
  14 // inside ntdll.dll.
  15 class ServiceResolverThunk : public ResolverThunk {
  16  public:
  17   // The service resolver needs a child process to write to.
  18   ServiceResolverThunk(HANDLE process, bool relaxed)
  19       : process_(process), ntdll_base_(NULL), win2k_(false),
  20         relaxed_(relaxed), relative_jump_(0) {}
  21   virtual ~ServiceResolverThunk() {}
  22
  23   // Implementation of Resolver::Setup.
  24   virtual NTSTATUS Setup(const void* target_module,
  25                          const void* interceptor_module,
  26                          const char* target_name,
  27                          const char* interceptor_name,
  28                          const void* interceptor_entry_point,
  29                          void* thunk_storage,
  30                          size_t storage_bytes,
  31                          size_t* storage_used);
  32
  33   // Implementation of Resolver::ResolveInterceptor.
  34   virtual NTSTATUS ResolveInterceptor(const void* module,
  35                                       const char* function_name,
  36                                       const void** address);
  37
  38   // Implementation of Resolver::ResolveTarget.
  39   virtual NTSTATUS ResolveTarget(const void* module,
  40                                  const char* function_name,
  41                                  void** address);
  42
  43   // Implementation of Resolver::GetThunkSize.
  44   virtual size_t GetThunkSize() const;
  45
  46  protected:
  47   // The unit test will use this member to allow local patch on a buffer.
  48   HMODULE ntdll_base_;
  49
  50   // Handle of the child process.
  51   HANDLE process_;
  52
  53  protected:
  54   // Keeps track of a Windows 2000 resolver.
  55   bool win2k_;
  56
  57  private:
  58   // Returns true if the code pointer by target_ corresponds to the expected
  59   // type of function. Saves that code on the first part of the thunk pointed
  60   // by local_thunk (should be directly accessible from the parent).
  61   virtual bool IsFunctionAService(void* local_thunk) const;
  62
  63   // Performs the actual patch of target_.
  64   // local_thunk must be already fully initialized, and the first part must
  65   // contain the original code. The real type of this buffer is ServiceFullThunk
  66   // (yes, private). remote_thunk (real type ServiceFullThunk), must be
  67   // allocated on the child, and will contain the thunk data, after this call.
  68   // Returns the apropriate status code.
  69   virtual NTSTATUS PerformPatch(void* local_thunk, void* remote_thunk);
  70
  71   // Provides basically the same functionality as IsFunctionAService but it
  72   // continues even if it does not recognize the function code. remote_thunk
  73   // is the address of our memory on the child.
  74   bool SaveOriginalFunction(void* local_thunk, void* remote_thunk);
  75
  76   // true if we are allowed to patch already-patched functions.
  77   bool relaxed_;
  78   ULONG relative_jump_;
  79
  80   DISALLOW_COPY_AND_ASSIGN(ServiceResolverThunk);
  81 };
  82
  83 // This is the concrete resolver used to perform service-call type functions
  84 // inside ntdll.dll on WOW64 (32 bit ntdll on 64 bit Vista).
  85 class Wow64ResolverThunk : public ServiceResolverThunk {
  86  public:
  87   // The service resolver needs a child process to write to.
  88   Wow64ResolverThunk(HANDLE process, bool relaxed)
  89       : ServiceResolverThunk(process, relaxed) {}
  90   virtual ~Wow64ResolverThunk() {}
  91
  92  private:
  93   virtual bool IsFunctionAService(void* local_thunk) const;
  94
  95   DISALLOW_COPY_AND_ASSIGN(Wow64ResolverThunk);
  96 };
  97
  98 // This is the concrete resolver used to perform service-call type functions
  99 // inside ntdll.dll on WOW64 for Windows 8.
 100 class Wow64W8ResolverThunk : public ServiceResolverThunk {
 101  public:
 102   // The service resolver needs a child process to write to.
 103   Wow64W8ResolverThunk(HANDLE process, bool relaxed)
 104       : ServiceResolverThunk(process, relaxed) {}
 105   virtual ~Wow64W8ResolverThunk() {}
 106
 107  private:
 108   virtual bool IsFunctionAService(void* local_thunk) const;
 109
 110   DISALLOW_COPY_AND_ASSIGN(Wow64W8ResolverThunk);
 111 };
 112
 113 // This is the concrete resolver used to perform service-call type functions
 114 // inside ntdll.dll on Windows 2000 and XP pre SP2.
 115 class Win2kResolverThunk : public ServiceResolverThunk {
 116  public:
 117   // The service resolver needs a child process to write to.
 118   Win2kResolverThunk(HANDLE process, bool relaxed)
 119       : ServiceResolverThunk(process, relaxed) {
 120     win2k_ = true;
 121   }
 122   virtual ~Win2kResolverThunk() {}
 123
 124  private:
 125   virtual bool IsFunctionAService(void* local_thunk) const;
 126
 127   DISALLOW_COPY_AND_ASSIGN(Win2kResolverThunk);
 128 };
 129
 130 // This is the concrete resolver used to perform service-call type functions
 131 // inside ntdll.dll on Windows 8.
 132 class Win8ResolverThunk : public ServiceResolverThunk {
 133  public:
 134   // The service resolver needs a child process to write to.
 135   Win8ResolverThunk(HANDLE process, bool relaxed)
 136       : ServiceResolverThunk(process, relaxed) {}
 137   virtual ~Win8ResolverThunk() {}
 138
 139  private:
 140   virtual bool IsFunctionAService(void* local_thunk) const;
 141
 142   DISALLOW_COPY_AND_ASSIGN(Win8ResolverThunk);
 143 };
 144
 145 }  // namespace sandbox
 146
 147
 148 #endif  // SANDBOX_SRC_SERVICE_RESOLVER_H__