mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
7f9f1ecb71
This provides an implementation of the IDNA2008 standard and fixes CVE-2016-6261, CVE-2016-6263, CVE-2017-14062.
76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/* Classify a domain name for IDNA purposes.
|
|
Copyright (C) 2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <inet/net-internal.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
|
|
enum idna_name_classification
|
|
__idna_name_classify (const char *name)
|
|
{
|
|
mbstate_t mbs;
|
|
memset (&mbs, 0, sizeof (mbs));
|
|
const char *p = name;
|
|
const char *end = p + strlen (p) + 1;
|
|
bool nonascii = false;
|
|
bool backslash = false;
|
|
while (true)
|
|
{
|
|
wchar_t wc;
|
|
size_t result = mbrtowc (&wc, p, end - p, &mbs);
|
|
if (result == 0)
|
|
/* NUL terminator was reached. */
|
|
break;
|
|
else if (result == (size_t) -2)
|
|
/* Incomplete trailing multi-byte character. This is an
|
|
encoding error becaue we received the full name. */
|
|
return idna_name_encoding_error;
|
|
else if (result == (size_t) -1)
|
|
{
|
|
/* Other error, including EILSEQ. */
|
|
if (errno == EILSEQ)
|
|
return idna_name_encoding_error;
|
|
else if (errno == ENOMEM)
|
|
return idna_name_memory_error;
|
|
else
|
|
return idna_name_error;
|
|
}
|
|
else
|
|
{
|
|
/* A wide character was decoded. */
|
|
p += result;
|
|
if (wc == L'\\')
|
|
backslash = true;
|
|
else if (wc > 127)
|
|
nonascii = true;
|
|
}
|
|
}
|
|
|
|
if (nonascii)
|
|
{
|
|
if (backslash)
|
|
return idna_name_nonascii_backslash;
|
|
else
|
|
return idna_name_nonascii;
|
|
}
|
|
else
|
|
return idna_name_ascii;
|
|
}
|