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- // Copyright (c) 2012 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.
- #ifndef SANDBOX_WIN_SRC_SERVICE_RESOLVER_H_
- #define SANDBOX_WIN_SRC_SERVICE_RESOLVER_H_
- #include <stddef.h>
- #include "sandbox/win/src/nt_internals.h"
- #include "sandbox/win/src/resolver.h"
- namespace sandbox {
- // This is the concrete resolver used to perform service-call type functions
- // inside ntdll.dll.
- class ServiceResolverThunk : public ResolverThunk {
- public:
- // The service resolver needs a child process to write to.
- ServiceResolverThunk(HANDLE process, bool relaxed)
- : ntdll_base_(nullptr),
- process_(process),
- relaxed_(relaxed),
- relative_jump_(0) {}
- ServiceResolverThunk(const ServiceResolverThunk&) = delete;
- ServiceResolverThunk& operator=(const ServiceResolverThunk&) = delete;
- ~ServiceResolverThunk() override {}
- // Implementation of Resolver::Setup.
- 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) override;
- // Implementation of Resolver::ResolveInterceptor.
- NTSTATUS ResolveInterceptor(const void* module,
- const char* function_name,
- const void** address) override;
- // Implementation of Resolver::ResolveTarget.
- NTSTATUS ResolveTarget(const void* module,
- const char* function_name,
- void** address) override;
- // Implementation of Resolver::GetThunkSize.
- size_t GetThunkSize() const override;
- // Call this to set up ntdll_base_ which will allow for local patches.
- virtual void AllowLocalPatches();
- // Verifies that the function specified by |target_name| in |target_module| is
- // a service and copies the data from that function into |thunk_storage|. If
- // |storage_bytes| is too small, then the method fails.
- virtual NTSTATUS CopyThunk(const void* target_module,
- const char* target_name,
- BYTE* thunk_storage,
- size_t storage_bytes,
- size_t* storage_used);
- protected:
- // The unit test will use this member to allow local patch on a buffer.
- HMODULE ntdll_base_;
- // Handle of the child process.
- HANDLE process_;
- private:
- // Returns true if the code pointer by target_ corresponds to the expected
- // type of function. Saves that code on the first part of the thunk pointed
- // by local_thunk (should be directly accessible from the parent).
- virtual bool IsFunctionAService(void* local_thunk) const;
- // Performs the actual patch of target_.
- // local_thunk must be already fully initialized, and the first part must
- // contain the original code. The real type of this buffer is ServiceFullThunk
- // (yes, private). remote_thunk (real type ServiceFullThunk), must be
- // allocated on the child, and will contain the thunk data, after this call.
- // Returns the apropriate status code.
- virtual NTSTATUS PerformPatch(void* local_thunk, void* remote_thunk);
- // Provides basically the same functionality as IsFunctionAService but it
- // continues even if it does not recognize the function code. remote_thunk
- // is the address of our memory on the child.
- bool SaveOriginalFunction(void* local_thunk, void* remote_thunk);
- // true if we are allowed to patch already-patched functions.
- bool relaxed_;
- ULONG relative_jump_;
- };
- // This is the concrete resolver used to perform service-call type functions
- // inside ntdll.dll on WOW64 (32 bit ntdll on 64 bit Vista).
- class Wow64ResolverThunk : public ServiceResolverThunk {
- public:
- // The service resolver needs a child process to write to.
- Wow64ResolverThunk(HANDLE process, bool relaxed)
- : ServiceResolverThunk(process, relaxed) {}
- Wow64ResolverThunk(const Wow64ResolverThunk&) = delete;
- Wow64ResolverThunk& operator=(const Wow64ResolverThunk&) = delete;
- ~Wow64ResolverThunk() override {}
- private:
- bool IsFunctionAService(void* local_thunk) const override;
- };
- // This is the concrete resolver used to perform service-call type functions
- // inside ntdll.dll on WOW64 for Windows 8.
- class Wow64W8ResolverThunk : public ServiceResolverThunk {
- public:
- // The service resolver needs a child process to write to.
- Wow64W8ResolverThunk(HANDLE process, bool relaxed)
- : ServiceResolverThunk(process, relaxed) {}
- Wow64W8ResolverThunk(const Wow64W8ResolverThunk&) = delete;
- Wow64W8ResolverThunk& operator=(const Wow64W8ResolverThunk&) = delete;
- ~Wow64W8ResolverThunk() override {}
- private:
- bool IsFunctionAService(void* local_thunk) const override;
- };
- // This is the concrete resolver used to perform service-call type functions
- // inside ntdll.dll on Windows 8.
- class Win8ResolverThunk : public ServiceResolverThunk {
- public:
- // The service resolver needs a child process to write to.
- Win8ResolverThunk(HANDLE process, bool relaxed)
- : ServiceResolverThunk(process, relaxed) {}
- Win8ResolverThunk(const Win8ResolverThunk&) = delete;
- Win8ResolverThunk& operator=(const Win8ResolverThunk&) = delete;
- ~Win8ResolverThunk() override {}
- private:
- bool IsFunctionAService(void* local_thunk) const override;
- };
- // This is the concrete resolver used to perform service-call type functions
- // inside ntdll.dll on WOW64 for Windows 10.
- class Wow64W10ResolverThunk : public ServiceResolverThunk {
- public:
- // The service resolver needs a child process to write to.
- Wow64W10ResolverThunk(HANDLE process, bool relaxed)
- : ServiceResolverThunk(process, relaxed) {}
- Wow64W10ResolverThunk(const Wow64W10ResolverThunk&) = delete;
- Wow64W10ResolverThunk& operator=(const Wow64W10ResolverThunk&) = delete;
- ~Wow64W10ResolverThunk() override {}
- private:
- bool IsFunctionAService(void* local_thunk) const override;
- };
- } // namespace sandbox
- #endif // SANDBOX_WIN_SRC_SERVICE_RESOLVER_H_
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