rn-biometric-authentication
v1.0.2
Published
React Native library biometric authentication.
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React Native Biometric Auth
React native biometric Auth is a bridge to Android/iOS for biometric authentication.
Feature List
- Check if Biometric authentication enabled on the device.
- Authenticate user using Biometric with a fallback mechanism to passcode or device password.
- Supported on both Android and iOS.
How to use
Installation
npm i rn-biometric-authentication
Link / AutoLinking
On React Native 0.60+ the CLI autolink feature links the module while building the app.
Additional configuration
iOS
This package requires an iOS target SDK version of iOS 10 or higher
Ensure that you have the NSFaceIDUsageDescription
entry set in your react native iOS project, or Face ID will not work properly. This description will be will be presented to the user the first time a biometrics action is taken, and the user will be asked if they want to allow the app to use Face ID. If the user declines the usage of face id for the app, the isSensorAvailable
function will indicate biometrics is unavailable until the face id permission is specifically allowed for the app by the user.
Android
This package requires a compiled SDK version of 29 (Android 10.0) or higher
Methods
isSensorAvailable()
Detects what type of biometric sensor is available. Returns a Promise
that resolves to an object with details about biometrics availability
Result Object
| Property | Type | Description |
| --- | --- | --- |
| available | bool | A boolean indicating if biometrics is available or not |
| biometryType | string | A string indicating what type of biometrics is available. TouchID
(iOS), FaceID
(iOS), Biometrics
(Android), or undefined
if biometrics is not available. |
| error | string | An error message indicating why biometrics may not be available. undefined
if there is no error. |
Example
import ReactNativeBiometricAuth from 'rn-biometric-authentication'
ReactNativeBiometricAuth.isSensorAvailable()
.then((resultObject) => {
const { available, biometryType } = resultObject
if (available && biometryType === ReactNativeBiometrics.TouchID) {
console.log('ReactNativeBiometricAuth', 'TouchID is supported')
} else if (available && biometryType === ReactNativeBiometrics.FaceID) {
console.log('ReactNativeBiometricAuth', 'FaceID is supported')
} else if (available && biometryType === ReactNativeBiometrics.Biometrics) {
console.log('ReactNativeBiometricAuth', 'Biometrics is supported')
} else {
console.log('ReactNativeBiometricAuth', 'Biometrics not supported')
}
})
simplePrompt(options)
Prompts the user for their fingerprint or face id. Returns a Promise
that resolves if the user provides a valid biometrics or cancel the prompt, otherwise the promise rejects.
Options Object
| Parameter | Type | Description | iOS | Android |
| --- | --- | --- | --- | --- |
| promptMessage | string | Message that will be displayed in the biometrics prompt | ✔ | ✔ |
| cancelButtonText | string | Text to be displayed for the cancel button on biometric prompts, defaults to Cancel
| ✖ | ✔ |
| isDeviceAuthEnabled | boolean | Enable fallback to device credential for authentication. | ✖ | ✔ |
| fallbackText | string | Fallback text to be displayed for passcode if TouchID
or FaceID
authentication failed. | ✔ | ✖ |
Result Object
| Property | Type | Description |
| --- | --- | --- |
| success | bool | A boolean indicating if the biometric prompt succeeded, false
if the users cancels the biometrics prompt |
| error | string | An error message indicating why the biometric prompt failed. undefined
if there is no error. |
Example
import ReactNativeBiometricAuth from 'rn-biometric-authentication'
ReactNativeBiometricAuth.simplePrompt({promptMessage: 'Authenticate'})
.then((resultObject) => {
const { success } = resultObject
if (success) {
console.log('ReactNativeBiometricAuth', 'Success')
} else {
console.log('ReactNativeBiometricAuth', 'Cancelled')
}
})
.catch(() => {
console.log('ReactNativeBiometricAuth', 'Failed')
})
Inspiration
This library uses some code from react-native-biometrics. Added options to fallback to the device credentials for authentication. Removed some feature to make it simple to use for authentication purpose only.