/**
* idna_to_unicode_4z4z:
* @input: zero-terminated Unicode string.
* @output: pointer to newly allocated output Unicode string.
* @flags: IDNA flags, e.g. IDNA_ALLOW_UNASSIGNED or IDNA_USE_STD3_ASCII_RULES.
*
* Convert possibly ACE encoded domain name in UCS-4 format into a
* UCS-4 string. The domain name may contain several labels,
* separated by dots. The output buffer must be deallocated by the
* caller.
*
* Return value: Returns IDNA_SUCCESS on success, or error code.
**/
int
idna_to_unicode_4z4z (const uint32_t * input, uint32_t ** output, int flags)
{
const uint32_t *start = input;
const uint32_t *end = input;
uint32_t *buf;
size_t buflen;
uint32_t *out = NULL;
size_t outlen = 0;
*output = NULL;
do
{
end = start;
for (; *end && !DOTP (*end); end++)
;
buflen = end - start;
buf = malloc (sizeof (buf[0]) * (buflen + 1));
if (!buf)
return IDNA_MALLOC_ERROR;
idna_to_unicode_44i (start, end - start, buf, &buflen, flags);
/* don't check return value as per specification! */
if (out)
{
uint32_t *newp = realloc (out,
sizeof (out[0])
* (outlen + 1 + buflen + 1));
if (!newp)
{
free (buf);
free (out);
return IDNA_MALLOC_ERROR;
}
out = newp;
out[outlen++] = 0x002E; /* '.' (full stop) */
memcpy (out + outlen, buf, sizeof (buf[0]) * buflen);
outlen += buflen;
out[outlen] = 0x0;
free (buf);
}
else
{
out = buf;
outlen = buflen;
out[outlen] = 0x0;
}
start = end + 1;
}
while (*end);
*output = out;
return IDNA_SUCCESS;
}
int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max) {
#ifdef HAVE_LIBIDN
size_t input_size, output_size;
_cleanup_free_ uint32_t *input = NULL;
_cleanup_free_ char *result = NULL;
uint32_t *output = NULL;
size_t w;
/* To be invoked after unescaping */
assert(encoded);
assert(decoded);
if (encoded_size < sizeof(IDNA_ACE_PREFIX)-1)
return 0;
if (memcmp(encoded, IDNA_ACE_PREFIX, sizeof(IDNA_ACE_PREFIX) -1) != 0)
return 0;
input = stringprep_utf8_to_ucs4(encoded, encoded_size, &input_size);
if (!input)
return -ENOMEM;
output_size = input_size;
output = newa(uint32_t, output_size);
idna_to_unicode_44i(input, input_size, output, &output_size, 0);
result = stringprep_ucs4_to_utf8(output, output_size, NULL, &w);
if (!result)
return -ENOMEM;
if (w <= 0)
return 0;
if (w+1 > decoded_max)
return -EINVAL;
memcpy(decoded, result, w+1);
return w;
#else
return 0;
#endif
}
void
doit (void)
{
char label[100];
uint32_t *ucs4label = NULL;
uint32_t tmp[100];
size_t len, len2, i;
int rc;
for (i = 0; i < sizeof (idna) / sizeof (idna[0]); i++)
{
if (debug)
printf ("IDNA entry %d: %s\n", i, idna[i].name);
if (debug)
{
printf ("in:\n");
ucs4print (idna[i].in, idna[i].inlen);
}
rc = idna_to_ascii_4i (idna[i].in, idna[i].inlen, label, idna[i].flags);
if (rc != idna[i].toasciirc)
{
fail ("IDNA entry %d failed: %d\n", i, rc);
if (debug)
printf ("FATAL\n");
continue;
}
if (debug && rc == IDNA_SUCCESS)
{
printf ("computed out: %s\n", label);
printf ("expected out: %s\n", idna[i].out);
}
else if (debug)
printf ("returned %d expected %d\n", rc, idna[i].toasciirc);
if (rc == IDNA_SUCCESS)
{
if (strlen (idna[i].out) != strlen (label) ||
strcasecmp (idna[i].out, label) != 0)
{
fail ("IDNA entry %d failed\n", i);
if (debug)
printf ("ERROR\n");
}
else if (debug)
printf ("OK\n");
}
else if (debug)
printf ("OK\n");
if (ucs4label)
free (ucs4label);
ucs4label = stringprep_utf8_to_ucs4 (idna[i].out, -1, &len);
if (debug)
{
printf ("in: %s (%d==%d)\n", idna[i].out, strlen (idna[i].out),
len);
ucs4print (ucs4label, len);
}
len2 = sizeof (tmp) / sizeof (tmp[0]);
rc = idna_to_unicode_44i (ucs4label, len, tmp, &len2, idna[i].flags);
if (debug)
{
printf ("expected out (%d):\n",
rc == IDNA_SUCCESS ? idna[i].inlen : len);
if (rc == IDNA_SUCCESS)
ucs4print (idna[i].in, idna[i].inlen);
else
ucs4print (ucs4label, len);
printf ("computed out (%d):\n", len2);
ucs4print (tmp, len2);
}
if (rc != idna[i].tounicoderc)
{
fail ("IDNA entry %d failed: %d\n", i, rc);
if (debug)
printf ("FATAL\n");
continue;
}
if ((rc == IDNA_SUCCESS && (len2 != idna[i].inlen ||
memcmp (idna[i].in, tmp, len2) != 0)) ||
(rc != IDNA_SUCCESS && (len2 != len ||
memcmp (ucs4label, tmp, len) != 0)))
{
if (debug)
{
if (rc == IDNA_SUCCESS)
printf ("len=%d len2=%d\n", len2, idna[i].inlen);
else
printf ("len=%d len2=%d\n", len, len2);
}
fail ("IDNA entry %d failed\n", i);
if (debug)
printf ("ERROR\n");
}
else if (debug)
printf ("OK\n\n");
}
if (ucs4label)
free (ucs4label);
}