Update to Version 1.4.0

Please consult the changelog.

About

This plugin was created referencing the Fingerprint Dialog sample and the Confirm Credential sample referenced by the Android 6.0 APIs webpage.

This plugin will open a native dialog fragment prompting the user to authenticate using their fingerprint. If the device has a secure lockscreen (pattern, PIN, or password), the user may opt to authenticate using that method as a backup.

This plugin will only work on devices whose manufacturers have implemented the Android 6.0 Fingerprint Authentication API. This plugin does not support the Samsung Pass SDK and not all Samsung devices implement the Android 6.0 Fingerprint Authentication API. If you are testing this plugin on a Samsung device and it is not working, please check the device compatibility before reporting an issue.

Screenshots

Fingerprint Authentication Dialog

Backup Credentials

Installation

Cordova

cordova plugin add cordova-plugin-android-fingerprint-auth

Ionic

ionic cordova plugin add cordova-plugin-android-fingerprint-auth

Meteor

meteor add cordova:cordova-plugin-android-fingerprint-auth@1.2.7 (or present version)

How to use

• Call isAvailable() to check the fingerprint status.
• Call encrypt() or decrypt() show the Authentication Dialog.
• Call delete() when you want to delete the cipher for the user.

If you are not concerned with encrypting credentials and just want device authentication (fingerprint or backup), just call encrypt() with a clientId and look for a callback to the successCallback.

Encrypt/Decrypt User Credentials

• Encrypt user credentials
  • Have user sign in with username and password.
  • Check plugin availability and pass username and password to encrypt().
  • Store encrypted token with user profile.
• Decrypt user credentials
  • Prompt for username.
  • Query on username to retrieve encrypted token.
  • Pass username and token to decrypt() to return password.
  • Login using username and decrypted password.

Example implementation

• I have created an example implementation using Angular2-Meteor and Ionic2 (ionic2-meteor-login-fingerprint).
  • See "How It Works"!

API Reference

• FingerprintAuth
  • isAvailable(isAvailableSuccess, isAvailableError)
  • encrypt(encryptConfig, successCallback, errorCallback)
  • decrypt(decryptConfig, successCallback, errorCallback)
  • delete(deleteConfg, successCallback, errorCallback)
  • dismiss(successCallback, errorCallback)
  • ERRORS
• Config Object

FingerprintAuth.isAvailable(successCallback, errorCallback)

Opens a native dialog fragment to use the device hardware fingerprint scanner to authenticate against fingerprints registered for the device.

isAvailable() Result Object

Example

FingerprintAuth.isAvailable(isAvailableSuccess, isAvailableError);

/**
 * @return {
 *      isAvailable:boolean,
 *      isHardwareDetected:boolean,
 *      hasEnrolledFingerprints:boolean
 *   }
 */
function isAvailableSuccess(result) {
    console.log("FingerprintAuth available: " + JSON.stringify(result));
    if (result.isAvailable) {
        var encryptConfig = {}; // See config object for required parameters
        FingerprintAuth.encrypt(encryptConfig, encryptSuccessCallback, encryptErrorCallback);
    }
}

function isAvailableError(message) {
    console.log("isAvailableError(): " + message);
}

FingerprintAuth Config Object

FingerprintAuth.encrypt(encryptConfig, encryptSuccessCallback, encryptErrorCallback)

Result Object

Example

var encryptConfig = {
    clientId: "myAppName",
    username: "currentUser",
    password: "currentUserPassword"
};


FingerprintAuth.encrypt(encryptConfig, successCallback, errorCallback);

function successCallback(result) {
    console.log("successCallback(): " + JSON.stringify(result));
    if (result.withFingerprint) {
        console.log("Successfully encrypted credentials.");
        console.log("Encrypted credentials: " + result.token);  
    } else if (result.withBackup) {
        console.log("Authenticated with backup password");
    }
}

function errorCallback(error) {
    if (error === FingerprintAuth.ERRORS.FINGERPRINT_CANCELLED) {
        console.log("FingerprintAuth Dialog Cancelled!");
    } else {
        console.log("FingerprintAuth Error: " + error);
    }
}

FingerprintAuth.decrypt(decryptConfig, encryptSuccessCallback, encryptErrorCallback)

Result Object

Example

var decryptConfig = {
    clientId: "myAppName",
    username: "currentUser",
    token: "base64encodedUserCredentials"
};

FingerprintAuth.decrypt(decryptConfig, successCallback, errorCallback);

function successCallback(result) {
    console.log("successCallback(): " + JSON.stringify(result));
    if (result.withFingerprint) {
        console.log("Successful biometric authentication.");
        if (result.password) {
            console.log("Successfully decrypted credential token.");
            console.log("password: " + result.password);  
        }
    } else if (result.withBackup) {
        console.log("Authenticated with backup password");
    }
}

function errorCallback(error) {
    if (error === FingerprintAuth.ERRORS.FINGERPRINT_CANCELLED) {
        console.log("FingerprintAuth Dialog Cancelled!");
    } else {
        console.log("FingerprintAuth Error: " + error);
    }
}

FingerprintAuth.delete(config, successCallback, errorCallback)

Used to delete a cipher.

Config Object

Example

FingerprintAuth.delete({
            clientId: "myAppName",
            username: "usernameToDelete"
        }, successCallback, errorCallback);

function successCallback(result) {
    console.log("Successfully deleted cipher: " + JSON.stringify(result));
}

function errorCallback(error) {
    console.log(error);
}

FingerprintAuth.dismiss(successCallback, errorCallback)

Used to dismiss a Fingerprint Authentication Dialog if one is being displayed

Example

FingerprintAuth.dismiss(successCallback, errorCallback);

function successCallback(result) {
    console.log("Successfully dismissed FingerprintAuth dialog: " + JSON.stringify(result));
}

function errorCallback(error) {
    console.log(error);
}

FingerprintAuth.ERRORS JSON Object