From 6a70979196ee60a4e34c08ff3316f44336e8d251 Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 21 Jul 2025 23:14:20 +0200
Subject: [PATCH] Mon 21 Jul 22:43:21 CEST 2025

---
 js/com/pwgen.js | 127 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 js/com/pwgen.js

diff --git a/js/com/pwgen.js b/js/com/pwgen.js
new file mode 100644
index 0000000..a37e4f3
--- /dev/null
+++ b/js/com/pwgen.js
@@ -0,0 +1,127 @@
+/**
+ **      ==============================
+ **       O           O      O   OOOO
+ **       O           O     O O  O   O
+ **       O           O     O O  O   O
+ **       OOOO   OOOO O     OOO  OOOO
+ **       O   O       O    O   O O   O
+ **       O   O       O    O   O O   O
+ **       OOOO        OOOO O   O OOOO
+ **      ==============================
+ **      Dr. Stefan Bosse http://www.bsslab.de
+ **
+ **      COPYRIGHT: THIS SOFTWARE, EXECUTABLE AND SOURCE CODE IS OWNED
+ **                 BY THE AUTHOR(S).
+ **                 THIS SOURCE CODE MAY NOT BE COPIED, EXTRACTED,
+ **                 MODIFIED, OR OTHERWISE USED IN A CONTEXT
+ **                 OUTSIDE OF THE SOFTWARE SYSTEM.
+ **
+ **    $AUTHORS:     Bermi Ferrer, Stefan Bosse 
+ **    $INITIAL:     (C) 2011-2015 Bermi Ferrer <bermi@bermilabs.com>, 2017-2018 Stefan Bosse
+ **    $REVESIO:     1.3.1
+ **
+ **    $INFO:
+ *
+ * password-generator using crypto random number generation (slow,HQ)
+ * !using built-in crypto random generators using either native crypto module or polyfill!
+ * 
+ * options = {length,memorable,lowercase,uppercase,pattern,number?:boolean,range?:[]}
+ *
+ * Using always twister random byte generator (not random byte array) 
+ *
+ *     $ENDINFO
+ */
+
+var Crypto = Require('os/crypto.rand'); // Require('crypto');
+
+module.exports.generate = function (options) {
+  
+  function numgen (options) {
+    // assuming byte number range 0-255
+    var arr = new Uint8Array(options.length||8);
+    getRandomValues(arr);
+    return arr;
+  }
+  
+  function pwgen (options) {
+    var localName, consonant, letter, vowel, pattern = options.pattern,
+        char = "", n, i, validChars = [], prefix=options.prefix;
+    letter = /[a-zA-Z]$/;
+    vowel = /[aeiouAEIOU]$/;
+    consonant = /[bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ]$/;
+    if (options.length == null) {
+      options.length = 10;
+    }
+    if (pattern == null) {
+      pattern = /\w/;
+    }
+    if (prefix == null) {
+      prefix = '';
+    }
+
+    // Non memorable passwords will pick characters from a pre-generated
+    // list of characters
+    if (!options.memorable) {
+      for (i = 33; 126 > i; i += 1) {
+        char = String.fromCharCode(i);
+        if (char.match(pattern)) {
+          validChars.push(char);
+        }
+      }
+
+      if (!validChars.length) {
+        throw new Error("Could not find characters that match the " +
+          "password pattern " + pattern + ". Patterns must match individual " +
+          "characters, not the password as a whole.");
+      }
+    }
+
+
+    while (prefix.length < options.length) {
+      if (options.memorable) {
+        if (prefix.match(consonant)) {
+          pattern = vowel;
+        } else {
+          pattern = consonant;
+        }
+        n = Crypto.randomByte(33,126); // rand(33, 126);
+        char = String.fromCharCode(n);
+      } else {
+        char = validChars[rand(0, validChars.length)];
+      }
+
+      if (options.lowercase) char = char.toLowerCase();
+      else if (options.uppercase) char = char.toUpperCase();
+      
+      if (char.match(pattern)) {
+        prefix = "" + prefix + char;
+      }
+    }
+    return prefix;
+  };
+
+
+  function rand(min, max) {
+    var key, value, arr = new Uint8Array(max);
+    getRandomValues(arr);
+    for (key in arr) {
+      if (arr.hasOwnProperty(key)) {
+        value = arr[key];
+        if (value > min && value < max) {
+          return value;
+        }
+      }
+    }
+    return rand(min, max);
+  }
+
+
+  function getRandomValues(buf) {
+    var bytes = Crypto.randomBytes(buf.length);
+    buf.set(bytes);
+  }
+  if (options.number) 
+    return numgen(options)
+  else
+    return pwgen(options);
+};