1630355 - Character encoding wrong in the email address when using non-ascii in domain part of email address (IDN)

Status: RESOLVED DUPLICATE of bug 811272

(Thunderbird :: Account Manager, defect, P3)

Description

[Marcin]

Attachment: Przechwytywanie.PNG

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36

Steps to reproduce:

The problem occurs when entering Polish characters in the account configuration exactly the email address.
For example, I enter the email address:
marcin@łyżka.pl

Actual results:

I approve the changes and leave the account configuration.
Then I enter the account configuration again, the e-mail address shows the address:
marcin@By|ka.pl

When I send emails, the recipient sees the address: marcin@By|ka.pl
instead: marcin@łyżka.pl
so he can't reply to the message

Expected results:

After confirming the changes in the account configuration, the e-mail address should be as follows: marcin@łyżka.pl

Comment 1

[Daniel Veditz [:dveditz]]

Sounds like a bug, but not a security bug? If it remains hidden as a security bug very few people will see it.

Comment 2

[Daniel Veditz [:dveditz]]

Confirming, can reproduce.

Comment 3

[Daniel Veditz [:dveditz]]

'ł' (small L with stroke) is U-0142 and 'ż' (small Z with dot above) is U-017C

'B' is 0x42 and '|' is 0x7C

Looks like the input is in Unicode and then it's being converted to ASCII (or maybe Latin-1) by just dropping the first byte. We had some ancient JavaScript<-->C apis that did that and maybe those are still being used here? If we have to store it single-byte then we should convert it to UTF8 instead.

Comment 4

[Marcin]

I was unable to deselect the security option: Only users in all of the selected groups can view this bug.
So I created a new bug so that it would be available to everyone.
https://bugzilla.mozilla.org/show_bug.cgi?id=1630718

Comment 5

[Firefox Bug Husbandry Bot]

Because this bug's Severity has not been changed from the default since it was filed, and it's Priority is -- (Backlog,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)

Comment 6

[Marcin]

Is there anything known about when the character encoding bug is fixed?

Comment 7

[Magnus Melin [:mkmelin]]

We don't really support IDN mails too well atm.
For the actual issue, which is just one small part of the support, fields like email should be AUTF8String instead of ACString - https://searchfox.org/comm-central/rev/9f453dd597f0b985b8fe7689b239e3b70de7749d/mailnews/base/public/nsIMsgIdentity.idl#41

Comment 8

[Marcin]

Any progress in fixing this bugs?