[VALIDATOR-356] IDN.toASCII drops trailing dot in Java 6 & 7

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.1 Release
• Fix Version/s: 1.5.0
• Assignee: Unassigned
• Reporter: Sebb
• Created: 15/Jan/15 01:57
• Updated: 24/Nov/15 02:24
• Resolved: 15/Jan/15 02:10

Description

The Java 6 method String java.net.IDN.toASCII(String) drops the final input character if it is a dot (or equivalent, see RFC3490 3.1 1)

This causes problems for authority and domain validation.

This problem has been seen in
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
and
Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
but appears to be fixed in
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)

Note also that the Java 8 version throws
java.lang.IllegalArgumentException: Empty label is not a legal name
if the argument contains two consecutive dots.

Fix to follow.