readme.md

cordova-plugin-biometric-keychain

A cordova plugin adding the iOS TouchID and FaceID / Android fingerprint to your app and allowing you to store a password securely in the device keychain with detect change when any new fingerprint or touchId added or removed from your device

Platforms

• Android
• IOS

Installation

The latest, from the master repo:

$ cordova plugin add cordova-plugin-biometric-keychain

touchid.js is brought in automatically. There is no need to change or add anything in your html.

Manually

Download the source files and copy them to your project.

iOS: Copy the four .h and two .m files to platforms/ios/<ProjectName>/Plugins

Based on the original touch ID created by different people

• https://github.com/sjhoeksma/cordova-plugin-keychain-touch-id
• https://github.com/EddyVerbruggen/cordova-plugin-touch-id
• https://github.com/kunder-lab/kunder-touchid-keychain
• https://github.com/PeerioTechnologies/peerio-keychain-touchid
• https://github.com/nheezemans/touchid/blob/master/src/ios/TouchID.m

Cordova plugin for interacting with iOS touchId and keychain

Usage

Make sure you check if the plugin is installed

if (window.plugins.touchid) {

}

Call the function you like

isAvailable(successCallback, errorCallback(msg)) will Check if touchid is available on the used device

save(key,password, successCallback, errorCallback(msg)) will save a password under the key in the device keychain, which can be retrieved using a fingerprint

verify(key,message,successCallback(password), errorCallback(errorCode)) will open the fingerprint dialog, for the given key, showing an additional message. successCallback will return the password stored in key chain. errorCallback will return the error code, where -1 indicated not available.

has(key,successCallback, errorCallback) will check if there is a password stored within the keychain for the given key

delete(key,successCallback, errorCallback) will delete the password stored under given key from the keychain

didFingerprintDatabaseChange(successCallback, errorCallback) will check if there a new fingerprint or touchid added or removed for your device

Android quirks

When a new fingerprint is enrolled, no more fingerprints are enrolled, secure lock screen is disabled or forcibly reset, the key which is used to hash the password is permanently invalidated. It cannot be used anymore.

verify and save functions will return the "KeyPermanentlyInvalidatedException" message in the error callback. This invalid key is removed - user needs to save their password again.

Examples

if (window.plugins) {
    window.plugins.touchid.isAvailable(function() {
        window.plugins.touchid.has("MyKey", function() {
            alert("Touch ID avaialble and Password key available");
        }, function() {
            alert("Touch ID available but no Password Key available");
        });
    }, function(msg) {
        alert("no Touch ID available");
    });
}

if (window.plugins) {
    window.plugins.touchid.verify("MyKey", "My Message", function(password) {
        alert("Tocuh " + password);
    });
}

if (window.plugins) {
    window.plugins.touchid.save("MyKey", "My Password", function() {
        alert("Password saved");
    });
}

if (window.plugins) {
    window.plugins.touchid.delete("MyKey", function() {
        alert("Password key deleted");
    });
}

if(window.plugins)
{
    window.plugins.touchid.didFingerprintDatabaseChange(function(changed) {
	    if(changed)
	    {
	      alert("fingerprint changed");
	    }
    });
}