more shims, path, crypto, url

shims/crypto/scrypt.js

@@ -0,0 +1,29 @@
+// Shim for crypto.scrypt
+// Delegates to window.scrypt which is already loaded by Obsidian's own scrypt.js
+
+export function scrypt(password, salt, keylen, options, callback) {
+  // Node signature: scrypt(password, salt, keylen, options, callback)
+  // Obsidian's app.js checks for window.require("crypto") and uses it if available,
+  // otherwise falls back to window.scrypt  -  so this shim just delegates to the latter.
+
+  if (typeof options === 'function') {
+    callback = options;
+    options = {};
+  }
+
+  const N = options?.N || 32768;
+  const r = options?.r || 8;
+  const p = options?.p || 1;
+
+  if (window.scrypt && window.scrypt.scrypt) {
+    // Use the browser scrypt library already loaded by Obsidian
+    const pwBytes = typeof password === 'string' ? new TextEncoder().encode(password) : password;
+    const saltBytes = typeof salt === 'string' ? new TextEncoder().encode(salt) : salt;
+
+    window.scrypt.scrypt(pwBytes, saltBytes, N, r, p, keylen)
+      .then((result) => callback(null, new Uint8Array(result)))
+      .catch((err) => callback(err));
+  } else {
+    callback(new Error('scrypt not available'));
+  }
+}