diff -Nuar password_policy/constraints/constraint_character_types.php password_policy.wrk/constraints/constraint_character_types.php
--- password_policy/constraints/constraint_character_types.php	1969-12-31 19:00:00.000000000 -0500
+++ password_policy.wrk/constraints/constraint_character_types.php	2006-12-31 22:56:58.302772000 -0500
@@ -0,0 +1,49 @@
+<?php
+
+include_once "constraint.php";
+
+class Character_Types_Constraint extends Constraint {
+	
+
+	function validate($plaintext_password, $user = NULL) {
+		$len = strlen($plaintext_password);
+		$numTypes = 0;
+
+		$hasUpper = 0;
+		$hasLower = 0;
+		$hasDigit = 0;
+		$hasPunct = 0;
+		
+		for ($i = 0; $i < $len; $i++) {
+			
+			if (ctype_upper($plaintext_password[$i])) {
+				$hasUpper = 1;
+			} 
+			else if (ctype_lower($plaintext_password[$i])) {
+				$hasLower = 1;
+			}
+			else if (ctype_digit($plaintext_password[$i])) {
+				$hasDigit = 1;
+			}
+			else if (ctype_punct($plaintext_password[$i])) {
+				$hasPunct = 1;
+			}
+			
+			$numTypes = $hasUpper + $hasLower + $hasDigit + $hasPunct;	
+		}
+		
+		return $numTypes >= $this->minimumConstraintValue;
+	}
+	
+	function getDescription() {
+		return t("Password must contain the specified minimum number of character types.");
+	}
+	
+	function getValidationErrorMessage() {
+		return t("Password must contain a minimum of %numChars different %types of characters.", 
+		array('%numChars' => $this->minimumConstraintValue, 
+			  '%types' => format_plural($this->minimumConstraintValue, t('type'), t('types'))));		
+	}
+	
+}
+?>
diff -Nuar password_policy/password_policy.module password_policy.wrk/password_policy.module
--- password_policy/password_policy.module	2006-12-11 17:12:41.000000000 -0500
+++ password_policy.wrk/password_policy.module	2006-12-31 23:07:36.640730072 -0500
@@ -305,7 +305,8 @@
 	new Lowercase_Constraint(1),
 	new Uppercase_Constraint(1),
 	new Punctuation_Constraint(1),
-	new History_Constraint());
+	new History_Constraint(),
+	new Character_Types_Constraint(1));
 }
 
 /**