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url: don't use bad offset in tld_check_name to show error

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libidn's tld_check_lz returns an error offset of the first character
that it failed to process, however that offset is not a byte offset and
may not even be in the locale encoding therefore we can't use it to show
the user the character that failed to process.

Bug: https://github.com/curl/curl/issues/731
Reported-by: Karlson2k
This commit is contained in:
Jay Satiro 2016-03-26 14:41:35 -04:00
parent 4adee1947c
commit 3d144ab99b
1 changed files with 4 additions and 5 deletions
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9
lib/url.c
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@ -3728,17 +3728,16 @@ static bool tld_check_name(struct SessionHandle *data,
if(rc != IDNA_SUCCESS)
return FALSE;
/* Warning: err_pos receives "the decoded character offset rather than the
byte position in the string." And as of libidn 1.32 that character offset
is for UTF-8, even if the passed in string is another locale. */
rc = tld_check_lz(uc_name, &err_pos, NULL);
#ifndef CURL_DISABLE_VERBOSE_STRINGS
#ifdef HAVE_TLD_STRERROR
if(rc != TLD_SUCCESS)
tld_errmsg = tld_strerror((Tld_rc)rc);
#endif
if(rc == TLD_INVALID)
infof(data, "WARNING: %s; pos %u = `%c'/0x%02X\n",
tld_errmsg, err_pos, uc_name[err_pos],
uc_name[err_pos] & 255);
else if(rc != TLD_SUCCESS)
if(rc != TLD_SUCCESS)
infof(data, "WARNING: TLD check for %s failed; %s\n",
uc_name, tld_errmsg);
#endif /* CURL_DISABLE_VERBOSE_STRINGS */