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implement detached signature verification of policy manifests on Windows
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| 'use strict'; | ||
|
|
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| const { | ||
| isCodeIntegrityForcedByOS, | ||
| isFileTrustedBySystemCodeIntegrityPolicy, | ||
| } = internalBinding('code_integrity'); | ||
|
|
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| module.exports = { | ||
| isCodeIntegrityForcedByOS, | ||
| isFileTrustedBySystemCodeIntegrityPolicy, | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,206 @@ | ||
| #include "node_code_integrity.h" | ||
| #include "v8.h" | ||
| #include "node.h" | ||
| #include "env-inl.h" | ||
| #include "node_external_reference.h" | ||
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|
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| namespace node { | ||
|
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| using v8::Boolean; | ||
| using v8::Context; | ||
| using v8::FunctionCallbackInfo; | ||
| using v8::Local; | ||
| using v8::Object; | ||
| using v8::Value; | ||
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| namespace codeintegrity { | ||
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| static void IsCodeIntegrityForcedByOS(const FunctionCallbackInfo<Value>& args) { | ||
| Environment* env = Environment::GetCurrent(args); | ||
| int ret = 0; | ||
|
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| #ifdef _WIN32 | ||
| HRESULT hr = E_FAIL; | ||
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| HMODULE wldp_module = LoadLibraryExA( | ||
| "wldp.dll", | ||
| nullptr, | ||
| LOAD_LIBRARY_SEARCH_SYSTEM32); | ||
|
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| if (wldp_module == nullptr) { | ||
| // this case only happens on Windows versions that don't support | ||
| // code integrity policies. | ||
| args.GetReturnValue().Set(Boolean::New(env->isolate(), false)); | ||
| return; | ||
| } | ||
|
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| pfnWldpGetApplicationSettingBoolean WldpGetApplicationSettingBoolean = | ||
| (pfnWldpGetApplicationSettingBoolean)GetProcAddress( | ||
| wldp_module, | ||
| "WldpGetApplicationSettingBoolean"); | ||
|
|
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| if (WldpGetApplicationSettingBoolean != nullptr) { | ||
| HRESULT hr = WldpGetApplicationSettingBoolean( | ||
| L"nodejs", | ||
| L"EnforceCodeIntegrity", | ||
| &ret); | ||
|
|
||
| if (SUCCEEDED(hr)) { | ||
| args.GetReturnValue().Set( | ||
| Boolean::New(env->isolate(), static_cast<bool>(ret))); | ||
| return; | ||
| } else if (hr != 0x80070490) { // E_NOTFOUND | ||
| args.GetReturnValue().Set(Boolean::New(env->isolate(), false)); | ||
| return; | ||
| } | ||
| } | ||
|
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| // WldpGetApplicationSettingBoolean is the preferred way for applications to | ||
| // query security policy values. However, this method only exists on Windows | ||
| // versions going back to circa Win10 2023H2. In order to support systems | ||
| // older than that (down to Win10RS2), we can use the deprecated | ||
| // WldpQuerySecurityPolicy | ||
| pfnWldpQuerySecurityPolicy WldpQuerySecurityPolicy = | ||
| (pfnWldpQuerySecurityPolicy)GetProcAddress( | ||
| wldp_module, | ||
| "WldpQuerySecurityPolicy"); | ||
|
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| if (WldpQuerySecurityPolicy != nullptr) { | ||
| DECLARE_CONST_UNICODE_STRING(providerName, L"nodejs"); | ||
| DECLARE_CONST_UNICODE_STRING(keyName, L"Settings"); | ||
| DECLARE_CONST_UNICODE_STRING(valueName, L"EnforceCodeIntegrity"); | ||
| WLDP_SECURE_SETTING_VALUE_TYPE valueType = | ||
| WLDP_SECURE_SETTING_VALUE_TYPE_BOOLEAN; | ||
| ULONG valueSize = sizeof(int); | ||
| hr = WldpQuerySecurityPolicy( | ||
| &providerName, | ||
| &keyName, | ||
| &valueName, | ||
| &valueType, | ||
| &ret, | ||
| &valueSize); | ||
| if (FAILED(hr)) { | ||
| args.GetReturnValue().Set(Boolean::New(env->isolate(), false)); | ||
| return; | ||
| } | ||
| } | ||
| #endif // _WIN32 | ||
| args.GetReturnValue().Set(Boolean::New(env->isolate(), ret)); | ||
| } | ||
|
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| static void IsFileTrustedBySystemCodeIntegrityPolicy( | ||
| const FunctionCallbackInfo<Value>& args) { | ||
| #ifdef _WIN32 | ||
| Environment* env = Environment::GetCurrent(args); | ||
|
|
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| CHECK_EQ(args.Length(), 2); | ||
| CHECK(args[0]->IsString()); | ||
| CHECK(args[1]->IsString()); | ||
|
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| BufferValue manifestPath(env->isolate(), args[0]); | ||
| if (*manifestPath == nullptr) { | ||
| return env->ThrowError("Manifest path cannot be empty"); | ||
| } | ||
|
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| BufferValue signaturePath(env->isolate(), args[1]); | ||
| if (*signaturePath == nullptr) { | ||
| return env->ThrowError("Signature path cannot be empty"); | ||
| } | ||
|
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| HANDLE hNodePolicyFile = CreateFileA( | ||
| *manifestPath, | ||
| GENERIC_READ, | ||
| FILE_SHARE_READ, | ||
| nullptr, | ||
| OPEN_EXISTING, | ||
| FILE_ATTRIBUTE_NORMAL, | ||
| nullptr); | ||
|
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| if (hNodePolicyFile == INVALID_HANDLE_VALUE || hNodePolicyFile == nullptr) { | ||
| return env->ThrowError("invalid manifest path"); | ||
| } | ||
|
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| HANDLE hSignatureFile = CreateFileA( | ||
| *signaturePath, | ||
| GENERIC_READ, | ||
| FILE_SHARE_READ, | ||
| nullptr, | ||
| OPEN_EXISTING, | ||
| FILE_ATTRIBUTE_NORMAL, | ||
| nullptr); | ||
|
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| if (hSignatureFile == INVALID_HANDLE_VALUE || hSignatureFile == nullptr) { | ||
| return env->ThrowError("invalid signature path"); | ||
| } | ||
|
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| HMODULE wldp_module = LoadLibraryExA( | ||
| "wldp.dll", | ||
| nullptr, | ||
| LOAD_LIBRARY_SEARCH_SYSTEM32); | ||
|
|
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| if (wldp_module == nullptr) { | ||
| return env->ThrowError("Unable to load wldp.dll"); | ||
| } | ||
|
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| pfnWldpCanExecuteFileFromDetachedSignature | ||
| WldpCanExecuteFileFromDetachedSignature = | ||
| (pfnWldpCanExecuteFileFromDetachedSignature)GetProcAddress( | ||
| wldp_module, | ||
| "WldpCanExecuteFileFromDetachedSignature"); | ||
|
|
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| if (WldpCanExecuteFileFromDetachedSignature == nullptr) { | ||
| return env->ThrowError( | ||
| "Cannot find proc WldpCanExecuteFileFromDetachedSignature"); | ||
| } | ||
|
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| const GUID wldp_host_other = WLDP_HOST_OTHER; | ||
| WLDP_EXECUTION_POLICY result; | ||
| HRESULT hr = WldpCanExecuteFileFromDetachedSignature( | ||
| wldp_host_other, | ||
| WLDP_EXECUTION_EVALUATION_OPTION_NONE, | ||
| hNodePolicyFile, | ||
| hSignatureFile, | ||
| nullptr, | ||
| &result); | ||
|
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| if (FAILED(hr)) { | ||
| return env->ThrowError("WldpCanExecuteFileFromDetachedSignature failed"); | ||
| } | ||
|
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| bool isPolicyTrusted = (result == WLDP_EXECUTION_POLICY_ALLOWED); | ||
| args.GetReturnValue().Set(isPolicyTrusted); | ||
| #endif // _WIN32 | ||
| } | ||
|
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| void Initialize(Local<Object> target, | ||
| Local<Value> unused, | ||
| Local<Context> context, | ||
| void* priv) { | ||
| Environment* env = Environment::GetCurrent(context); | ||
| SetMethod( | ||
| context, | ||
| target, | ||
| "isCodeIntegrityForcedByOS", | ||
| IsCodeIntegrityForcedByOS); | ||
|
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| SetMethod( | ||
| context, | ||
| target, | ||
| "isFileTrustedBySystemCodeIntegrityPolicy", | ||
| IsFileTrustedBySystemCodeIntegrityPolicy); | ||
| } | ||
|
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| void RegisterExternalReferences(ExternalReferenceRegistry* registry) { | ||
| // BindingData::RegisterExternalReferences(registry); | ||
|
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| registry->Register(IsCodeIntegrityForcedByOS); | ||
| registry->Register(IsFileTrustedBySystemCodeIntegrityPolicy); | ||
| } | ||
|
|
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| } // namespace codeintegrity | ||
| } // namespace node | ||
| NODE_BINDING_CONTEXT_AWARE_INTERNAL(code_integrity, | ||
| node::codeintegrity::Initialize) | ||
| NODE_BINDING_EXTERNAL_REFERENCE(code_integrity, | ||
| node::codeintegrity::RegisterExternalReferences) |
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