From d3925ba5bd25224bc4a60d3d6a107c464994a1ea Mon Sep 17 00:00:00 2001
From: ulf69 <ulf69>
Date: Wed, 15 Sep 2004 17:53:22 +0000
Subject: initial revision

---
(limited to 'pwmanager/pwmanager/genpasswd.cpp')

diff --git a/pwmanager/pwmanager/genpasswd.cpp b/pwmanager/pwmanager/genpasswd.cpp
new file mode 100644
index 0000000..b0cceff
--- a/dev/null
+++ b/pwmanager/pwmanager/genpasswd.cpp
@@ -0,0 +1,192 @@
+/***************************************************************************
+ *                                                                         *
+ *   copyright (C) 2004 by Michael Buesch                                  *
+ *   email: mbuesch@freenet.de                                             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License version 2        *
+ *   as published by the Free Software Foundation.                         *
+ *                                                                         *
+ ***************************************************************************/
+
+/***************************************************************************
+ * copyright (C) 2004 by Ulf Schenk
+ * This file is originaly based on version 1.0.1 of pwmanager
+ * and was modified to run on embedded devices that run microkde
+ *
+ * $Id$
+ **************************************************************************/  
+
+#include "genpasswd.h"
+#include "pwmexception.h"
+#include "randomizer.h"
+
+
+/* how often can a char of the same charset be reused in order */
+#define FILTER_MAX_CHARSET_REUSE	3
+/* re-randomize all charsets on every iteration (0/1) */
+#define RERAND_CHARSET			0
+
+
+struct staticCharsetStruct
+{
+	const char *lower;
+	const char *upper;
+	const char *num;
+	const char *special;
+	const char *blank;
+};
+
+static struct staticCharsetStruct staticCharset = {
+	"abcdefghijklmnopqrstuvwxyz",
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
+	"0123456789",
+	"!\"§$%&/()=?,.-;:_+",
+	" "
+};
+
+
+GenPasswd::GenPasswd()
+ : length (8)
+ , useFilter (true)
+{
+	dynCharset.setAutoDelete(true);
+}
+
+void GenPasswd::setCharset(bool lower,
+			   bool upper,
+			   bool num,
+			   bool special,
+			   bool blank,
+			   QString user)
+{
+	unsigned int sanityCheck = 0;
+	dynCharset_element *tmpElement;
+	dynCharset.clear();
+	if (lower) {
+		tmpElement = new dynCharset_element;
+		tmpElement->refCnt = 0;
+		tmpElement->data = staticCharset.lower;
+		dynCharset.append(tmpElement);
+		++sanityCheck;
+	}
+	if (upper) {
+		tmpElement = new dynCharset_element;
+		tmpElement->refCnt = 0;
+		tmpElement->data = staticCharset.upper;
+		dynCharset.append(tmpElement);
+		++sanityCheck;
+	}
+	if (num) {
+		tmpElement = new dynCharset_element;
+		tmpElement->refCnt = 0;
+		tmpElement->data = staticCharset.num;
+		dynCharset.append(tmpElement);
+		++sanityCheck;
+	}
+	if (special) {
+		tmpElement = new dynCharset_element;
+		tmpElement->refCnt = 0;
+		tmpElement->data = staticCharset.special;
+		dynCharset.append(tmpElement);
+		++sanityCheck;
+	}
+	if (blank) {
+		tmpElement = new dynCharset_element;
+		tmpElement->refCnt = 0;
+		tmpElement->data = staticCharset.blank;
+		dynCharset.append(tmpElement);
+	}
+	if (!user.isEmpty()) {
+		tmpElement = new dynCharset_element;
+		tmpElement->refCnt = 0;
+		tmpElement->data = user;
+		dynCharset.append(tmpElement);
+		if (likely(user.length() >= 2))
+			++sanityCheck;
+	}
+	BUG_ON(!sanityCheck);
+	rndDynCharset();
+}
+
+void GenPasswd::rndDynCharset()
+{
+	QString tmpData;
+	int pos;
+	Randomizer *rnd = Randomizer::obj();
+	// QPtrList<dynCharset_element>::iterator is not available in QT-3.1
+	unsigned int i, cnt = dynCharset.count();
+	dynCharset_element *p;
+	for (i = 0; i < cnt; ++i) {
+		p = dynCharset.at(i);
+		PWM_ASSERT(p);
+		tmpData = QString::null;
+		while (p->data.length()) {
+			pos = rnd->genRndInt() % p->data.length();
+			tmpData.append(p->data.at(pos));
+			p->data.remove(pos, 1);
+		}
+		p->data = tmpData;
+	}
+}
+
+QString GenPasswd::gen()
+{
+	BUG_ON(dynCharset.count() <= 0);
+	BUG_ON(length < 1);
+	dynCharset_element *curCharset;
+	QString ret;
+	int i;
+	for (i = 0; i < length; ++i) {
+		curCharset = selectNextCharset();
+#if RERAND_CHARSET != 0
+		rndDynCharset();
+#endif // RERAND_CHARSET
+		ret += genNewRandom(curCharset);
+	}
+	return ret;
+}
+
+GenPasswd::dynCharset_element * GenPasswd::selectNextCharset()
+{
+	dynCharset_element *ret;
+	int numCharsets = dynCharset.count();
+	BUG_ON(numCharsets <= 0);
+	if (numCharsets == 1)
+		return dynCharset.at(0);
+	Randomizer *rnd = Randomizer::obj();
+	if (useFilter) {
+		// find out which charsets are allowed (filtering)
+		QPtrList<dynCharset_element> allowedCharsets;
+		// QPtrList<dynCharset_element>::iterator is not available in QT-3.1
+		unsigned int i, cnt = dynCharset.count();
+		dynCharset_element *p;
+		for (i = 0; i < cnt; ++i) {
+			p = dynCharset.at(i);
+			PWM_ASSERT(p);
+			if (p->refCnt < FILTER_MAX_CHARSET_REUSE) {
+				allowedCharsets.append(p);
+			} else {
+				p->refCnt = 0;
+			}
+		}
+		int numAllowedCharsets = allowedCharsets.count();
+		BUG_ON(numAllowedCharsets <= 0);
+		// now get a random charset out of the allowed
+		unsigned int randomPos = rnd->genRndUInt() % numAllowedCharsets;
+		ret = allowedCharsets.at(randomPos);
+		ret->refCnt++;
+		return ret;
+	}
+	// all charsets are allowed here (no filtering). Get a random.
+	unsigned int randomPos = rnd->genRndUInt() % numCharsets;
+	ret = dynCharset.at(randomPos);
+	return ret;
+}
+
+QChar GenPasswd::genNewRandom(const dynCharset_element *charset)
+{
+	Randomizer *rnd = Randomizer::obj();
+	int pos = rnd->genRndInt() % charset->data.length();
+	return charset->data.at(pos);
+}
--
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