bugGNU gettext - Bugs: bug #37857, libiconv allows encoding...


bug #37857: libiconv allows encoding characters above U+10FFFF in UTF-8

Submitted by:  Vlad R <vladr>
Submitted on:  Mon 03 Dec 2012 08:14:02 PM UTC  
Category: NoneSeverity: 3 - Normal
Item Group: NoneStatus: None
Privacy: PublicAssigned to: None
Open/Closed: Open

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Mon 03 Dec 2012 08:14:02 PM UTC, original submission:

In lib/utf-8.h we imply adherence to RFC 3629, but RFC 3629 explicitly restricts the range of characters to 0000-10FFFF (the UTF-16 accessible range.) In this respect, lib/utf-8.h follows RFC 2279.

As a result, such non-RFC 3629 sequences (in excess of U+10ffff) are deemed "valid" by libiconv (`printf '\xf4\x90\x80\x80' | iconv -f utf8 -t utf8` succeeds) but are not convertible to any other encoding (including utf32: `printf '\xf4\x90\x80\x80' | iconv -f utf8 -t utf32` fails.)

Sequences deemed valid by libiconv are also not interoperable with misc. XML parsers (e.g. Java-based.)

This is similar to the glibc bug 2373.

Vlad R <vladr>


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