closes #1976

src/password.js

@@ -0,0 +1,51 @@
+
+
+'use strict';
+var fork = require('child_process').fork;
+
+(function(module) {
+
+	var child = fork('./bcrypt', process.argv.slice(2), {
+					env: process.env
+				});
+
+	var callbacks = {
+		'hash': {},
+		'compare': {}
+	};
+
+	module.hash = function(rounds, password, callback) {
+		sendCommand({type: 'hash', password: password, rounds: rounds}, callback);
+	};
+
+	module.compare = function(password, hash, callback) {
+		sendCommand({type: 'compare', password: password, hash: hash}, callback);
+	};
+
+	function sendCommand(data, callback) {
+		callbacks[data.type][data.password] = callbacks[data.type][data.password] || [];
+		callbacks[data.type][data.password].push(callback);
+		child.send(data);
+	}
+
+	child.on('message', function(msg) {
+		var cbs = callbacks[msg.type] ? callbacks[msg.type][msg.password] : null;
+
+		if (Array.isArray(cbs)) {
+			if (msg.err) {
+				var err = new Error(msg.err.message);
+				cbs.forEach(function(callback) {
+					callback(err);
+				});
+				cbs.length = 0;
+				return;
+			}
+
+			cbs.forEach(function(callback) {
+				callback(null, msg.type === 'hash' ? msg.hash : msg.result);
+			});
+			cbs.length = 0;
+		}
+	});
+
+}(exports));