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name: Test
on:
push:
branches: [main]
pull_request:
branches: [main]
jobs:
windows:
runs-on: windows-latest
strategy:
matrix:
node-version: [lts/*, latest]
steps:
- uses: actions/checkout@v4
- name: Use Node.js ${{ matrix.node-version }}
uses: actions/setup-node@v4
with:
node-version: ${{ matrix.node-version }}
cache: 'npm'
- run: npm ci
- run: npm run build
- run: npm run lint
windows2019:
runs-on: windows-2019
strategy:
matrix:
node-version: [lts/*, latest]
steps:
- uses: actions/checkout@v4
- name: Use Node.js ${{ matrix.node-version }}
uses: actions/setup-node@v4
with:
node-version: ${{ matrix.node-version }}
cache: 'npm'
- run: npm ci
- run: npm run build
- run: npm run lint
ubuntu:
runs-on: ubuntu-latest
strategy:
matrix:
node-version: [lts/*, latest]
steps:
- uses: actions/checkout@v4
- name: Use Node.js ${{ matrix.node-version }}
uses: actions/setup-node@v4
with:
node-version: ${{ matrix.node-version }}
cache: 'npm'
- run: npm ci
- run: npm run build
- run: npm run lint

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dist/
coverage/
node_modules/
npm-debug.log
.eslintcache
.DS_Store
docs/
build/

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{
"singleQuote": true,
"trailingComma": "all"
}

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GNU AFFERO GENERAL PUBLIC LICENSE
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free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

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# @signalapp/windows-ucv
[![npm](https://img.shields.io/npm/v/@signalapp/windows-ucv)](https://www.npmjs.com/package/@signalapp/windows-ucv)
## Installation
```sh
npm install @signalapp/windows-ucv
```
## Usage
```js
import { checkAvailability, requestVerification } from '@signalapp/windows-ucv';
console.log(await checkAvailability());
console.log(await requestVerification('message'));
```
See https://learn.microsoft.com/en-us/uwp/api/windows.security.credentials.ui.userconsentverifier.requestverificationasync?view=winrt-26100
## License
Copyright 2025 Signal Messenger, LLC
Licensed under the GNU AGPLv3: https://www.gnu.org/licenses/agpl-3.0.html

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#include <assert.h>
#include <windows.h>
#include <winrt/windows.foundation.metadata.h>
#include <winrt/windows.security.credentials.ui.h>
#include "napi.h"
using namespace winrt;
using namespace Windows::Security::Credentials::UI;
using namespace Windows::Foundation;
static inline std::string ConvertAvailability(
UserConsentVerifierAvailability availability) {
switch (availability) {
case UserConsentVerifierAvailability::Available:
return "available";
case UserConsentVerifierAvailability::DeviceBusy:
return "deviceBusy";
case UserConsentVerifierAvailability::DeviceNotPresent:
return "deviceNotPresent";
case UserConsentVerifierAvailability::DisabledByPolicy:
return "disabledByPolicy";
case UserConsentVerifierAvailability::NotConfiguredForUser:
return "notConfiguredForUser";
default:
return "unknown";
}
}
static inline std::string ConvertVerificationResult(
UserConsentVerificationResult result) {
switch (result) {
case UserConsentVerificationResult::Verified:
return "verified";
case UserConsentVerificationResult::DeviceBusy:
return "deviceBusy";
case UserConsentVerificationResult::DeviceNotPresent:
return "deviceNotPresent";
case UserConsentVerificationResult::DisabledByPolicy:
return "disabledByPolicy";
case UserConsentVerificationResult::NotConfiguredForUser:
return "notConfiguredForUser";
case UserConsentVerificationResult::RetriesExhausted:
return "retriesExhausted";
case UserConsentVerificationResult::Canceled:
return "canceled";
default:
return "unknown";
}
}
void CheckAvailability(const Napi::CallbackInfo& info) {
auto env = info.Env();
auto callback = info[0].As<Napi::Function>();
if (!callback.IsFunction()) {
NAPI_THROW(Napi::Error::New(env, "First argument must be a function"),
Napi::Value());
}
auto tsfn = Napi::ThreadSafeFunction::New(
env, callback, "windows-ucv.checkAvailability", 0, 1);
auto op = UserConsentVerifier::CheckAvailabilityAsync();
op.Completed([tsfn](IAsyncOperation<UserConsentVerifierAvailability> info,
AsyncStatus status) {
auto res = tsfn.BlockingCall([info, status](auto env, auto jsCallback) {
std::string result;
if (status == AsyncStatus::Completed) {
result = ConvertAvailability(info.GetResults());
} else {
result = "error";
}
jsCallback.Call({Napi::String::New(env, result)});
});
assert(res == napi_ok);
tsfn.Release();
});
}
void RequestVerification(const Napi::CallbackInfo& info) {
auto env = info.Env();
auto msg = info[0].As<Napi::String>();
if (!msg.IsString()) {
NAPI_THROW(Napi::Error::New(env, "First argument must be a string"),
Napi::Value());
}
auto callback = info[1].As<Napi::Function>();
if (!callback.IsFunction()) {
NAPI_THROW(Napi::Error::New(env, "Second argument must be a function"),
Napi::Value());
}
auto utf8 = msg.Utf8Value();
auto hstring = winrt::to_hstring(utf8);
auto tsfn = Napi::ThreadSafeFunction::New(
env, callback, "windows-ucv.requestVerification", 0, 1);
auto op = UserConsentVerifier::RequestVerificationAsync(hstring);
op.Completed([tsfn](IAsyncOperation<UserConsentVerificationResult> info,
AsyncStatus status) {
auto res = tsfn.BlockingCall([info, status](auto env, auto jsCallback) {
std::string result;
if (status == AsyncStatus::Completed) {
result = ConvertVerificationResult(info.GetResults());
} else {
result = "error";
}
jsCallback.Call({Napi::String::New(env, result)});
});
assert(res == napi_ok);
tsfn.Release();
});
}
Napi::Object Init(Napi::Env env, Napi::Object exports) {
exports.Set(Napi::String::New(env, "checkAvailability"),
Napi::Function::New(env, CheckAvailability));
exports.Set(Napi::String::New(env, "requestVerification"),
Napi::Function::New(env, RequestVerification));
return exports;
}
NODE_API_MODULE(windows - ucv, Init)

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{
"conditions": [
["OS=='win'", {
"targets": [{
"target_name": "windows-ucv",
"dependencies": [
"<!(node -p \"require('node-addon-api').targets\"):node_addon_api_except",
],
"sources": [
"addon.cpp",
],
"libraries": [
"credui.lib",
],
"msvs_settings": {
"VCCLCompilerTool": {
"ExceptionHandling": 1, # /EHsc,
"RuntimeLibrary": "2", # /MD
},
},
}],
}, {
"targets": [{
"target_name": "noop",
"type": "none",
}],
}],
],
}

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// @ts-check
import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
export default tseslint.config(
eslint.configs.recommended,
...tseslint.configs.strict,
{ ignores: ['dist', 'docs'] },
);

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import loadBinding from 'bindings';
export type Availability =
| 'available'
| 'deviceBusy'
| 'deviceNotPresent'
| 'disabledByPolicy'
| 'notConfiguredForUser'
| 'unknown';
export type Verification =
| 'verified'
| 'deviceBusy'
| 'deviceNotPresent'
| 'disabledByPolicy'
| 'notConfiguredForUser'
| 'retriesExhausted'
| 'canceled'
| 'unknown';
type BindingType = Readonly<{
checkAvailability(callback: (result: Availability | 'error') => void): void;
requestVerification(
message: string,
callback: (result: Verification | 'error') => void,
): void;
}>;
let binding: BindingType | undefined;
if (process.platform === 'win32') {
binding = loadBinding('windows-ucv');
}
/**
* Check if User Constant Verification is available.
*
* See: https://learn.microsoft.com/en-us/uwp/api/windows.security.credentials.ui.userconsentverifier.checkavailabilityasync?view=winrt-26100#windows-security-credentials-ui-userconsentverifier-checkavailabilityasync
*/
export async function checkAvailability(): Promise<Availability> {
if (!binding) {
throw new Error('This library works only on Windows');
}
return new Promise((resolve, reject) => {
binding.checkAvailability((result) => {
if (result === 'error') {
return reject(new Error('Internal error'));
}
return resolve(result);
});
});
}
/**
* Request User Constant Verification
*
* See: https://learn.microsoft.com/en-us/uwp/api/windows.security.credentials.ui.userconsentverifier.requestverificationasync?view=winrt-26100
*/
export async function requestVerification(
message: string,
): Promise<Verification> {
if (!binding) {
throw new Error('This library works only on Windows');
}
return new Promise((resolve, reject) => {
binding.requestVerification(message, (result) => {
if (result === 'error') {
return reject(new Error('Internal error'));
}
return resolve(result);
});
});
}

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{
"name": "@signalapp/windows-ucv",
"version": "1.0.0",
"description": "Windows User Consent Verification",
"main": "dist/index.js",
"types": "dist/index.d.ts",
"module": "dist/esm/index.js",
"files": [
"addon.cpp",
"dist",
"!dist/tsconfig.tsbuildinfo",
"!dist/esm/tsconfig.tsbuildinfo",
"README.md",
"binding.gyp"
],
"scripts": {
"watch": "npm run build:cjs -- --watch",
"build": "npm run build:cjs && npm run build:esm",
"build:cjs": "tsc",
"build:esm": "tsc --module es2020 --declaration false --outDir dist/esm",
"format": "prettier --cache --write .",
"lint": "npm run check:eslint && npm run check:format",
"check:eslint": "eslint --cache .",
"check:format": "prettier --cache --check .",
"prepublishOnly": "npm run clean && npm run build && npm run lint",
"clean": "rm -rf dist"
},
"repository": {
"type": "git",
"url": "git+ssh://git@github.com/signalapp/node-windows-ucv.git"
},
"keywords": [
"winrt",
"user",
"consent",
"verification",
"windows"
],
"author": {
"name": "Signal Messenger, LLC",
"email": "support@signal.org"
},
"license": "AGPL-3.0-only",
"bugs": {
"url": "https://github.com/signalapp/node-windows-ucv/issues"
},
"homepage": "https://github.com/signalapp/node-windows-ucv#readme",
"dependencies": {
"bindings": "^1.5.0",
"node-addon-api": "*"
},
"devDependencies": {
"@eslint/js": "^9.9.1",
"@types/bindings": "^1.5.5",
"@types/eslint__js": "^8.42.3",
"@types/node": "^22.5.0",
"eslint": "^9.9.1",
"prettier": "^3.3.3",
"typescript": "^5.5.4",
"typescript-eslint": "^8.2.0"
}
}

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{
"compilerOptions": {
/* Visit https://aka.ms/tsconfig to read more about this file */
/* Projects */
"incremental": true /* Save .tsbuildinfo files to allow for incremental compilation of projects. */,
/* Language and Environment */
"target": "es2022" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
/* Modules */
"module": "commonjs" /* Specify what module code is generated. */,
"moduleResolution": "node",
/* Emit */
"declaration": true,
"outDir": "./dist" /* Specify an output folder for all emitted files. */,
"stripInternal": true,
/* Interop Constraints */
"esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
"forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
/* Type Checking */
"strict": true /* Enable all strict type-checking options. */,
"noImplicitAny": true /* Enable error reporting for expressions and declarations with an implied 'any' type. */,
"strictNullChecks": true /* When type checking, take into account 'null' and 'undefined'. */,
"strictFunctionTypes": true /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */,
"strictBindCallApply": true /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */,
"strictPropertyInitialization": true /* Check for class properties that are declared but not set in the constructor. */,
"noImplicitThis": true /* Enable error reporting when 'this' is given the type 'any'. */,
"useUnknownInCatchVariables": true /* Default catch clause variables as 'unknown' instead of 'any'. */,
"noUnusedParameters": true /* Raise an error when a function parameter isn't read. */,
"exactOptionalPropertyTypes": true /* Interpret optional property types as written, rather than adding 'undefined'. */,
"noImplicitReturns": true /* Enable error reporting for codepaths that do not explicitly return in a function. */,
"noFallthroughCasesInSwitch": true /* Enable error reporting for fallthrough cases in switch statements. */,
"noUncheckedIndexedAccess": true /* Add 'undefined' to a type when accessed using an index. */,
"noImplicitOverride": true /* Ensure overriding members in derived classes are marked with an override modifier. */,
"noPropertyAccessFromIndexSignature": true /* Enforces using indexed accessors for keys declared using an indexed type. */
/* Completeness */
}
}