MacKeychainModule

I am not a C++ guy, feel free to improve this

Node module for accessing macOS Keychain directly from JavaScript. This way it is more secure than using /usr/bin/security, because when user selects Always allow option, he allows only your app to read the password, not to whoever can launch /usr/bin/security.

Building

cd MacKeychainModule ;
sudo npm install -g nw-gyp ;
nw-gyp configure --target=0.21.4 --arch=x64 ;
nw-gyp build --target=0.21.4;

Result will be in build/Release directory

Usage example

var MacKeychainModule = require('./build/Release/MacKeychainModule.node');

var getPasswordForAccount = function (host, username) {
    var accounts = MacKeychainModule.getAccountsForHost(host);
    for (var i = 0; i < accounts.length; i++) {
        var account = accounts[i];
        if (account.username == username) {
            return MacKeychainModule.getPasswordForRef(account.ref); // Keychain might ask user to allow access
        }
    }
    return null;
}

var pass = getPasswordForAccount("foo.com", "bar");

Variable now contains password for user bar at server foo.com

JavaScript API

MacKeychainModule.getAccountsForHost(host)

• Parameter {String} host - hostname of our interest
• Return value {Array} - array of accounts (see account below)

This method will list all stored accounts for given host

MacKeychainModule.getPasswordForRef(ref)

• Parameter {String} ref - Base64 encoded persistentRef of the keychain item
• Return value {String|null} - the password

This method will return the password from keychain item identified by ref

account

• account.username {String} - Username
• account.path {String} - Path part of URL
• account.port {Number} - Port number
• account.protocol {String} - Protocol part of URL
• account.ref {String} - Base64 encoded persistentRef of the keychain item

No password in account? Why?

Because reading password can show dialog to grant access to the password. This can be unwanted. Password can be obtained by calling:

MacKeychainModule.getPasswordForRef(account.ref)