IDN: Invalid codepoint encoded in ACE label

RESOLVED FIXED in mozilla1.5alpha



14 years ago
6 years ago


(Reporter: Yoshiro, YONEYA, Assigned: Darin Fisher)



Windows XP
Bug Flags:
blocking1.4.1 +

Firefox Tracking Flags

(Not tracked)



(1 attachment)



14 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624

When users entered Alphabet or Numerics in compatible (i.e Full-Width) form, the
resulting ACE label (both Punycode and RACE) includes 0x0 in it. For example:
www.U+FF4A U+FF44 U+FF4E is expected to be nameprepped and changed
into, but the result is

Reproducible: Always

Steps to Reproduce:
1. enter at address bar

Actual Results:  
the entered address was changed into, and DNS fails

Expected Results:  
jdna part should be nameprepped into jdna, i.e.

Comment 1

14 years ago
Confirmed. When we use Japanese Roman letters (either upper case or
lowercase), NamePrep does not produce the correct result.
Ever confirmed: true

Comment 2

14 years ago
Another example is "maß", i.e. "bei U+00DF"; during NamePrep, the german double
s is converted into two s and no non-LDH character remains. So it should not be
converted to Punycode after the normalization, opposite to how it is done

Comment 3

14 years ago
Sorry, the example went wrong: it is maß -> U+006D U+0061 U+00DF

Comment 4

14 years ago
We branch into IDN code whenever a hostname contains non-ASCII codepoints.  So,
it seems to me that as a last step, our IDN converter needs to verify that the
nameprepped hostname also contains non-ASCII values before we tack on the xn--
prefix.  If I am correct, then this should be fairly easy to fix.

Comment 5

14 years ago
Created attachment 127174 [details] [diff] [review]
v1 patch

Comment 6

14 years ago
-> me
Assignee: smontagu → darin
Severity: normal → major
Priority: -- → P1
Target Milestone: --- → mozilla1.5alpha


14 years ago
Attachment #127174 - Flags: review?(nhotta)

Comment 7

14 years ago
Darin, I tried your patch on Mozilla 1.4 branch with the example 
filed by the reporter. It works when the patch is applied.
I also tried a case when the user enters www.(JPN name).jp (in JPN full-
width Roman characters), this too works with the patch. 

Klaus, Yoneya-san, and others, please supply other real life examples
for verification. Thanks.

Comment 8

14 years ago
Comment on attachment 127174 [details] [diff] [review]
v1 patch

Attachment #127174 - Flags: review?(nhotta) → review+

Comment 9

14 years ago
Comment on attachment 127174 [details] [diff] [review]
v1 patch

bz: please see comment #4 for an explanation of this patch.
Attachment #127174 - Flags: superreview?(bzbarsky)

Comment 10

14 years ago
I wonder if full-width alphabet only domain names are accepted for registration.
I am not sure about the official guideline but I think that could be confusing
(also a risk for spoofing).
Yoneya san, does JPNIC allow those string for the registration?
Attachment #127174 - Flags: superreview?(bzbarsky) → superreview+

Comment 11

14 years ago
Last Resolved: 14 years ago
Resolution: --- → FIXED

Comment 12

14 years ago
This is re-comment to comment #10.

JPRS (is JP registory since Apr 2002) accepts full-width Alpha-Numerics in
inputted string for registration.  But those are NAMEPREPped by registration
system at the registration time and never appear in registered domain name.

Allowed Japanese characters for JP domain name are listed on

Comment 13

14 years ago
i think this patch should be included with any future 1.4 branch releases.
Flags: blocking1.4.x?

Comment 14

14 years ago
*** Bug 211320 has been marked as a duplicate of this bug. ***

Comment 15

14 years ago
Comment on attachment 127174 [details] [diff] [review]
v1 patch

this is an important bug to get fixed on the 1.4 branch.  it prevents IDN from
working with many sites.
Attachment #127174 - Flags: approval1.4.x?

Comment 16

14 years ago
Comment #15 is so true that we should definitely check this 
into 1.4 so that any future releases from 1.4 can benefit from this

Comment 17

14 years ago
Thanks to all, I found this bug was fixed in 20030708 trunk.
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.5a) Gecko/20030708


14 years ago
Flags: blocking1.4.x? → blocking1.4.x+

Comment 18

14 years ago
Comment on attachment 127174 [details] [diff] [review]
v1 patch

a=asa (on behalf of drivers) for checkin to the 1.4 branch.
Attachment #127174 - Flags: approval1.4.x? → approval1.4.x+

Comment 19

14 years ago
Keywords: fixed1.4


14 years ago
Keywords: fixed1.4 → fixed1.4.1


14 years ago
Blocks: 224532
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