diff --git a/app/Classes/LDAP/Attribute/Password/SHA.php b/app/Classes/LDAP/Attribute/Password/SHA.php
index 91ac331..07585b1 100644
--- a/app/Classes/LDAP/Attribute/Password/SHA.php
+++ b/app/Classes/LDAP/Attribute/Password/SHA.php
@@ -10,4 +10,9 @@ final class SHA extends Base
 	{
 		return sprintf('{%s}%s',self::key,base64_encode(hash('sha1',$password,true)));
 	}
+
+	public static function subid(string $password): bool
+	{
+		return preg_match('/^{'.static::key.'}/',$password);
+	}
 }
\ No newline at end of file
diff --git a/app/Classes/LDAP/Attribute/Password/SSHA.php b/app/Classes/LDAP/Attribute/Password/SSHA.php
index 4b4a982..8daa32b 100644
--- a/app/Classes/LDAP/Attribute/Password/SSHA.php
+++ b/app/Classes/LDAP/Attribute/Password/SSHA.php
@@ -16,4 +16,9 @@ final class SSHA extends Base
 	{
 		return sprintf('{%s}%s',self::key,$this->salted_hash($password,'sha1',self::salt,$salt));
 	}
+
+	public static function subid(string $password): bool
+	{
+		return preg_match('/^{'.static::key.'}/',$password);
+	}
 }
\ No newline at end of file