Strengthen the use of the Master Password.

- Use 30k iterations instead of 1.
- Enforce minimum password length of 8 characters.
- Adjust strength meter accordingly.

This resolves #82.

toolkit/mozapps/preferences/changemp.js

@@ -167,8 +167,8 @@ function setPasswordStrength()
 
 // length of the password
   var pwlength=(pw.length);
-  if (pwlength>5)
-    pwlength=5;
+  if (pwlength>10)
+    pwlength=10;
 
 
 // use of numbers in the password
@@ -190,7 +190,7 @@ function setPasswordStrength()
     upper=3;
 
 
-  var pwstrength=((pwlength*10)-20) + (numeric*10) + (numsymbols*15) + (upper*10);
+  var pwstrength=((pwlength*5)-20) + (numeric*10) + (numsymbols*15) + (upper*10);
 
   // make sure we're give a value between 0 and 100
   if ( pwstrength < 0 ) {
@@ -227,6 +227,12 @@ function checkPasswords()
     }
   }
 
+  // Never accept short passwords < 8 chars
+  if (pw1.length < 8) {
+    ok.setAttribute("disabled", "true");
+    return;
+  }
+  
   if (pw1 == pw2) {
     ok.setAttribute("disabled", "false");
   } else

toolkit/mozapps/preferences/changemp.xul

@@ -34,7 +34,7 @@
       <rows>
         <row>
           <label control="oldpw">&setPassword.oldPassword.label;</label>
-          <textbox id="oldpw" type="password"/>
+          <textbox id="oldpw" type="password" size="18"/>
           <!-- This textbox is inserted as a workaround to the fact that making the 'type'
                 & 'disabled' property of the 'oldpw' textbox toggle between ['password' &
                 'false'] and ['text' & 'true'] - as would be necessary if the menu has more
@@ -46,12 +46,13 @@
         </row>
         <row>
           <label control="pw1">&setPassword.newPassword.label;</label>
-          <textbox id="pw1" type="password"
+          <textbox id="pw1" type="password" size="18"
                    oninput="setPasswordStrength(); checkPasswords();"/>
         </row>
         <row>
           <label control="pw2">&setPassword.reenterPassword.label;</label>
-          <textbox id="pw2" type="password" oninput="checkPasswords();"/>
+          <textbox id="pw2" type="password" size="18"
+                   oninput="checkPasswords();"/>
         </row>
       </rows>
     </grid>