Move all source files into 'src' folder.

src/password.js

@@ -0,0 +1,35 @@
+// Tools for encrypting and decrypting passwords.
+// Basically promise-friendly wrappers for bcrypt.
+var bcrypt = require('bcrypt-nodejs');
+
+// Returns a promise for a hashed password string.
+function hash(password) {
+  return new Promise(function(fulfill, reject) {
+    bcrypt.hash(password, null, null, function(err, hashedPassword) {
+      if (err) {
+        reject(err);
+      } else {
+        fulfill(hashedPassword);
+      }
+    });
+  });
+}
+
+// Returns a promise for whether this password compares to equal this
+// hashed password.
+function compare(password, hashedPassword) {
+  return new Promise(function(fulfill, reject) {
+    bcrypt.compare(password, hashedPassword, function(err, success) {
+      if (err) {
+        reject(err);
+      } else {
+        fulfill(success);
+      }
+    });
+  });
+}
+
+module.exports = {
+  hash: hash,
+  compare: compare
+};