The Tor Browser: security/sandbox/win/src/resolver.h@6474c204b198 (annotated)

security/sandbox/win/src/resolver.h@6474c204b198 (annotated)

security/sandbox/win/src/resolver.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // Defines ResolverThunk, the interface for classes that perform interceptions.
 // For more details see
 // http://dev.chromium.org/developers/design-documents/sandbox .
 #include "base/basictypes.h"
 #include "sandbox/win/src/nt_internals.h"
 #ifndef SANDBOX_SRC_RESOLVER_H__
 #define SANDBOX_SRC_RESOLVER_H__
 namespace sandbox {
 // A resolver is the object in charge of performing the actual interception of
 // a function. There should be a concrete implementation of a resolver roughly
 // per type of interception.
 class ResolverThunk {
  public:
   ResolverThunk() {}
   virtual ~ResolverThunk() {}
   // Performs the actual interception of a function.
   // target_name is an exported function from the module loaded at
   // target_module, and must be replaced by interceptor_name, exported from
   // interceptor_module. interceptor_entry_point can be provided instead of
   // interceptor_name / interceptor_module.
   // thunk_storage must point to a buffer on the child's address space, to hold
   // the patch thunk, and related data. If provided, storage_used will receive
   // the number of bytes used from thunk_storage.
   //
   // Example: (without error checking)
   //
   // size_t size = resolver.GetThunkSize();
   // char* buffer = ::VirtualAllocEx(child_process, NULL, size,
   //                                 MEM_COMMIT, PAGE_READWRITE);
   // resolver.Setup(ntdll_module, NULL, L"NtCreateFile", NULL,
   //                &MyReplacementFunction, buffer, size, NULL);
   //
   // In general, the idea is to allocate a single big buffer for all
   // interceptions on the same dll, and call Setup n times.
   // WARNING: This means that any data member that is specific to a single
   // interception must be reset within this method.
   virtual NTSTATUS Setup(const void* target_module,
                          const void* interceptor_module,
                          const char* target_name,
                          const char* interceptor_name,
                          const void* interceptor_entry_point,
                          void* thunk_storage,
                          size_t storage_bytes,
                          size_t* storage_used) = 0;
   // Gets the address of function_name inside module (main exe).
   virtual NTSTATUS ResolveInterceptor(const void* module,
                                       const char* function_name,
                                       const void** address);
   // Gets the address of an exported function_name inside module.
   virtual NTSTATUS ResolveTarget(const void* module,
                                  const char* function_name,
                                  void** address);
   // Gets the required buffer size for this type of thunk.
   virtual size_t GetThunkSize() const = 0;
  protected:
   // Performs basic initialization on behalf of a concrete instance of a
   // resolver. That is, parameter validation and resolution of the target
   // and the interceptor into the member variables.
   //
   // target_name is an exported function from the module loaded at
   // target_module, and must be replaced by interceptor_name, exported from
   // interceptor_module. interceptor_entry_point can be provided instead of
   // interceptor_name / interceptor_module.
   // thunk_storage must point to a buffer on the child's address space, to hold
   // the patch thunk, and related data.
   virtual NTSTATUS Init(const void* target_module,
                         const void* interceptor_module,
                         const char* target_name,
                         const char* interceptor_name,
                         const void* interceptor_entry_point,
                         void* thunk_storage,
                         size_t storage_bytes);
   // Gets the required buffer size for the internal part of the thunk.
   size_t GetInternalThunkSize() const;
   // Initializes the internal part of the thunk.
   // interceptor is the function to be called instead of original_function.
   bool SetInternalThunk(void* storage, size_t storage_bytes,
                         const void* original_function, const void* interceptor);
   // Holds the resolved interception target.
   void* target_;
   // Holds the resolved interception interceptor.
   const void* interceptor_;
   DISALLOW_COPY_AND_ASSIGN(ResolverThunk);
 };
 }  // namespace sandbox
 #endif  // SANDBOX_SRC_RESOLVER_H__

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security/sandbox/win/src/resolver.h@6474c204b198 (annotated)

security/sandbox/win/src/resolver.h