modified

node_modules/@kdf/salt/index.js

@@ -0,0 +1,40 @@
+'use strict';
+
+const crypto = require('crypto');
+
+const MAX_UINT31 = 2147483647; // 2**31 - 1
+
+/**
+ * Generates a cryptographically secure random string to be used as a password
+ * salt, using Node's built-in crypto.randomBytes() function.
+ * @public
+ * @param  {number} length The length of the salt to be generated.
+ * Must be an integer within the range (`0` <= `length` <= `2^31-1`).
+ * @return {Promise.<Buffer>} The salt as a Buffer.
+ */
+function gensalt(length) {
+  // Salt length Validation
+  if (typeof length !== 'number' || !Number.isInteger(length)) {
+    return Promise.reject(
+      new TypeError("The 'length' parameter must be an integer")
+    );
+  }
+
+  if (length < 0 || length > MAX_UINT31) {
+    return Promise.reject(
+      new TypeError(
+        `The 'length' parameter must be in the range (0 <= length <= ${MAX_UINT31})`
+      )
+    );
+  }
+
+  return new Promise((resolve, reject) => {
+    crypto.randomBytes(length, (err, salt) => {
+      /* istanbul ignore next */
+      if (err) reject(err);
+      else resolve(salt);
+    });
+  });
+}
+
+module.exports = gensalt;