goodpasswd: Added

goodpasswd/goodpasswd

@@ -0,0 +1,34 @@
+#!/usr/bin/perl
+
+# This program generates passwords that:
+#
+# * are hard to guess
+# * will be displayed unambigously in any (normal) font
+# * will survive being passed through a bad fax machine
+# * has UPPER lower number and sign
+#
+# Too close: B8 cC g9 kK lI l1 oO O0 pP sS uU vV xX zZ ,. :; `' S5
+# Causes problems in URLs: @/:
+# Causes problems in shell: ! " # $ & ( ) [ ] { } ? | < > \ *
+# SQL uses: % for wildcard
+# Hard to type: ^ ~ ¨ ¤ § ½ æ ø å Æ Ø Å
+# Never 2 same chars next to eachother. (--) is bad
+
+my $pw;
+my @chars=split //, 'abdefhijmnqrtyADEFGHJLMNQRTY23467=+-';
+do { 
+    $pw = "";
+    for (1..12) {
+	do {
+	    # avoid double chars (such as --)
+	    $this = $chars[rand $#chars+1]
+	} while($last eq $this);
+	$last = $this;
+	$pw .= $this;
+    }
+} while (not($pw =~ /[A-Z]/ and
+	     $pw =~ /[a-z]/ and
+	     $pw =~ /[0-9]/ and
+	     $pw =~ /[^a-zA-Z0-9]/));
+
+print "$pw\n";