uschar *
string_domain_alabel_to_utf8(const uschar * alabel, uschar ** err)
{
#ifdef SUPPORT_I18N_2008
const uschar * label;
int sep = '.';
gstring * g = NULL;
while (label = string_nextinlist(&alabel, &sep, NULL, 0))
if ( string_is_alabel(label)
&& !(label = string_localpart_alabel_to_utf8_(label, err))
)
return NULL;
else
g = string_append_listele(g, '.', label);
return string_from_gstring(g);
#else
uschar * s1, * s;
int rc;
if ( (rc = idna_to_unicode_8z8z(CCS alabel, CSS &s1, IDNA_USE_STD3_ASCII_RULES))
!= IDNA_SUCCESS)
{
if (err) *err = US idna_strerror(rc);
return NULL;
}
s = string_copy(s1);
free(s1);
return s;
#endif
}
char* name_from_idn(const char *idn_name) {
#ifdef LIBIDN
char *name = NULL;
int rc = idna_to_ascii_lz(idn_name, &name, 0);
if (rc != IDNA_SUCCESS) {
ERR("IDNA (%s)\n", idna_strerror(rc));
return NULL;
}
return name;
#endif
return strdup(idn_name);
}
uschar *
string_domain_alabel_to_utf8(const uschar * alabel, uschar ** err)
{
uschar * s1;
uschar * s;
int rc;
if ( (rc = idna_to_unicode_8z8z(CCS alabel, CSS &s1, IDNA_USE_STD3_ASCII_RULES))
!= IDNA_SUCCESS)
{
if (err) *err = US idna_strerror(rc);
return NULL;
}
s = string_copy(s1);
free(s1);
return s;
}
uschar *
string_domain_utf8_to_alabel(const uschar * utf8, uschar ** err)
{
uschar * s1, * s;
int rc;
#ifdef SUPPORT_I18N_2008
/* Avoid lowercasing plain-ascii domains */
if (!string_is_utf8(utf8))
return string_copy(utf8);
/* Only lowercase is accepted by the library call. A pity since we lose
any mixed-case annotation. This does not really matter for a domain. */
{
uschar c;
for (s1 = s = US utf8; (c = *s1); s1++) if (!(c & 0x80) && isupper(c))
{
s = string_copy(utf8);
for (s1 = s + (s1 - utf8); (c = *s1); s1++) if (!(c & 0x80) && isupper(c))
*s1 = tolower(c);
break;
}
}
if ((rc = idn2_lookup_u8((const uint8_t *) s, &s1, IDN2_NFC_INPUT)) != IDN2_OK)
{
if (err) *err = US idn2_strerror(rc);
return NULL;
}
#else
s = US stringprep_utf8_nfkc_normalize(CCS utf8, -1);
if ( (rc = idna_to_ascii_8z(CCS s, CSS &s1, IDNA_ALLOW_UNASSIGNED))
!= IDNA_SUCCESS)
{
free(s);
if (err) *err = US idna_strerror(rc);
return NULL;
}
free(s);
#endif
s = string_copy(s1);
free(s1);
return s;
}
static ssize_t xlat_idna(void *instance, UNUSED REQUEST *request, char const *fmt, char *out, size_t freespace)
{
rlm_idn_t *inst = instance;
char *idna = NULL;
int res;
size_t len;
int flags = 0;
if (inst->use_std3_ascii_rules) {
flags |= IDNA_USE_STD3_ASCII_RULES;
}
if (inst->allow_unassigned) {
flags |= IDNA_ALLOW_UNASSIGNED;
}
res = idna_to_ascii_8z(fmt, &idna, flags);
if (res) {
if (idna) {
free (idna); /* Docs unclear, be safe. */
}
REDEBUG("%s", idna_strerror(res));
return -1;
}
len = strlen(idna);
/* 253 is max DNS length */
if (!((len < (freespace - 1)) && (len <= 253))) {
/* Never provide a truncated result, as it may be queried. */
REDEBUG("Conversion was truncated");
free(idna);
return -1;
}
strlcpy(out, idna, freespace);
free(idna);
return len;
}
uschar *
string_domain_utf8_to_alabel(const uschar * utf8, uschar ** err)
{
uschar * s1;
uschar * s;
int rc;
s = US stringprep_utf8_nfkc_normalize(CCS utf8, -1);
if ( (rc = idna_to_ascii_8z(CCS s, CSS &s1, IDNA_ALLOW_UNASSIGNED))
!= IDNA_SUCCESS)
{
free(s);
if (err) *err = US idna_strerror(rc);
return NULL;
}
free(s);
s = string_copy(s1);
free(s1);
return s;
}
/**
* Encode a native string to IDN. Handle the full string and do not split
* off a namespace prefix.
* @param in Input string in native locale encoding.
* @return IDN encoded output string.
*/
std::string
IdnTool::encodeFull (const std::string& in) const
{
char* buf = nullptr;
const Idna_flags flags = static_cast<Idna_flags> (0);
Idna_rc rc;
rc = static_cast<Idna_rc> (idna_to_ascii_lz (in.c_str (), &buf, flags));
if (rc != IDNA_SUCCESS)
{
std::free (buf);
std::ostringstream msg;
msg << "IDNA encoding failed: " << idna_strerror (rc);
throw std::runtime_error (msg.str ());
}
assert (buf);
const std::string res(buf);
std::free (buf);
return res;
}
int
main (void)
{
char buf[BUFSIZ];
char *p;
int rc;
size_t i;
setlocale (LC_ALL, "");
printf ("Input domain encoded as `%s': ", stringprep_locale_charset ());
fflush (stdout);
if (!fgets (buf, BUFSIZ, stdin))
perror ("fgets");
buf[strlen (buf) - 1] = '\0';
printf ("Read string (length %ld): ", (long int) strlen (buf));
for (i = 0; i < strlen (buf); i++)
printf ("%02x ", buf[i] & 0xFF);
printf ("\n");
rc = idna_to_ascii_lz (buf, &p, 0);
if (rc != IDNA_SUCCESS)
{
printf ("ToASCII() failed (%d): %s\n", rc, idna_strerror (rc));
return EXIT_FAILURE;
}
printf ("ACE label (length %ld): '%s'\n", (long int) strlen (p), p);
for (i = 0; i < strlen (p); i++)
printf ("%02x ", p[i] & 0xFF);
printf ("\n");
free (p);
return 0;
}
static int niquery_option_subject_name_handler(int index, const char *arg)
{
static char nigroup_buf[INET6_ADDRSTRLEN + 1 + IFNAMSIZ];
unsigned char *dnptrs[2], **dpp, **lastdnptr;
int n;
int i;
char *name, *p;
char *canonname = NULL, *idn = NULL;
unsigned char *buf = NULL;
size_t namelen;
size_t buflen;
int dots, fqdn = niquery_options[index].data;
MD5_CTX ctxt;
__u8 digest[MD5_DIGEST_LENGTH];
#ifdef USE_IDN
int rc;
#endif
if (niquery_set_subject_type(NI_SUBJ_NAME) < 0)
return -1;
#ifdef USE_IDN
name = stringprep_locale_to_utf8(arg);
if (!name) {
fprintf(stderr, "ping6: IDN support failed.\n");
exit(2);
}
#else
name = strdup(arg);
if (!name)
goto oomexit;
#endif
p = strchr(name, SCOPE_DELIMITER);
if (p) {
*p = '\0';
if (strlen(p + 1) >= IFNAMSIZ) {
fprintf(stderr, "ping6: too long scope name.\n");
exit(1);
}
}
#ifdef USE_IDN
rc = idna_to_ascii_8z(name, &idn, 0);
if (rc) {
fprintf(stderr, "ping6: IDN encoding error: %s\n",
idna_strerror(rc));
exit(2);
}
#else
idn = strdup(name);
if (!idn)
goto oomexit;
#endif
namelen = strlen(idn);
canonname = malloc(namelen + 1);
if (!canonname)
goto oomexit;
dots = 0;
for (i = 0; i < namelen + 1; i++) {
canonname[i] = isupper(idn[i]) ? tolower(idn[i]) : idn[i];
if (idn[i] == '.')
dots++;
}
if (fqdn == 0) {
/* guess if hostname is FQDN */
fqdn = dots ? 1 : -1;
}
buflen = namelen + 3 + 1; /* dn_comp() requrires strlen() + 3,
plus non-fqdn indicator. */
buf = malloc(buflen);
if (!buf) {
fprintf(stderr, "ping6: out of memory.\n");
goto errexit;
}
dpp = dnptrs;
lastdnptr = &dnptrs[ARRAY_SIZE(dnptrs)];
*dpp++ = (unsigned char *)buf;
*dpp++ = NULL;
n = dn_comp(canonname, (unsigned char *)buf, buflen, dnptrs, lastdnptr);
if (n < 0) {
fprintf(stderr, "ping6: Inappropriate subject name: %s\n", canonname);
goto errexit;
} else if (n >= buflen) {
fprintf(stderr, "ping6: dn_comp() returned too long result.\n");
goto errexit;
}
MD5_Init(&ctxt);
MD5_Update(&ctxt, buf, buf[0]);
MD5_Final(digest, &ctxt);
sprintf(nigroup_buf, "ff02::2:%02x%02x:%02x%02x%s%s",
digest[0], digest[1], digest[2], digest[3],
p ? "%" : "",
p ? p + 1 : "");
if (fqdn < 0)
buf[n] = 0;
free(ni_subject);
ni_group = nigroup_buf;
ni_subject = buf;
ni_subject_len = n + (fqdn < 0);
ni_group = nigroup_buf;
free(canonname);
free(idn);
free(name);
return 0;
oomexit:
fprintf(stderr, "ping6: out of memory.\n");
errexit:
free(buf);
free(canonname);
free(idn);
free(name);
exit(1);
}
void
doit (void)
{
const char *p;
/* Test success. */
p = idna_strerror (0);
if (strcmp (p, SUCCESS) != 0)
fail ("idna_strerror (0) failed: %s\n", p);
if (debug)
printf ("idna_strerror (0) OK\n");
p = pr29_strerror (0);
if (strcmp (p, SUCCESS) != 0)
fail ("pr29_strerror (0) failed: %s\n", p);
if (debug)
printf ("pr29_strerror (0) OK\n");
p = punycode_strerror (0);
if (strcmp (p, SUCCESS) != 0)
fail ("punycode_strerror (0) failed: %s\n", p);
if (debug)
printf ("punycode_strerror (0) OK\n");
p = stringprep_strerror (0);
if (strcmp (p, SUCCESS) != 0)
fail ("stringprep_strerror (0) failed: %s\n", p);
if (debug)
printf ("stringprep_strerror (0) OK\n");
p = tld_strerror (0);
if (strcmp (p, SUCCESS) != 0)
fail ("tld_strerror (0) failed: %s\n", p);
if (debug)
printf ("tld_strerror (0) OK\n");
/* Test unknown error. */
p = idna_strerror (42);
if (strcmp (p, UNKNOWN) != 0)
fail ("idna_strerror (42) failed: %s\n", p);
if (debug)
printf ("idna_strerror (42) OK\n");
p = pr29_strerror (42);
if (strcmp (p, UNKNOWN) != 0)
fail ("pr29_strerror (42) failed: %s\n", p);
if (debug)
printf ("pr29_strerror (42) OK\n");
p = punycode_strerror (42);
if (strcmp (p, UNKNOWN) != 0)
fail ("punycode_strerror (42) failed: %s\n", p);
if (debug)
printf ("punycode_strerror (42) OK\n");
p = stringprep_strerror (42);
if (strcmp (p, UNKNOWN) != 0)
fail ("stringprep_strerror (42) failed: %s\n", p);
if (debug)
printf ("stringprep_strerror (42) OK\n");
p = tld_strerror (42);
if (strcmp (p, UNKNOWN) != 0)
fail ("tld_strerror (42) failed: %s\n", p);
if (debug)
printf ("tld_strerror (42) OK\n");
/* Iterate through all error codes. */
{
size_t i;
const char *last_p = NULL;
for (i = 0;; i++)
{
p = idna_strerror (i);
if (p == last_p)
{
if (i == 11)
{
i = 200;
continue;
}
break;
}
if (debug)
printf ("idna %ld: %s\n", i, p);
last_p = p;
}
}
{
size_t i;
const char *last_p = NULL;
for (i = 0;; i++)
{
p = pr29_strerror (i);
if (p == last_p)
break;
if (debug)
printf ("pr29 %ld: %s\n", i, p);
last_p = p;
}
}
{
size_t i;
const char *last_p = NULL;
for (i = 0;; i++)
{
p = punycode_strerror (i);
if (p == last_p)
break;
if (debug)
printf ("punycode %ld: %s\n", i, p);
last_p = p;
}
}
{
size_t i;
const char *last_p = NULL;
for (i = 0;; i++)
{
p = stringprep_strerror (i);
if (p == last_p)
{
if (i == 7)
{
i = 99;
continue;
}
else if (i == 105)
{
i = 199;
continue;
}
break;
}
if (debug)
printf ("stringprep %ld: %s\n", i, p);
last_p = p;
}
}
{
size_t i;
const char *last_p = NULL;
for (i = 0;; i++)
{
p = tld_strerror (i);
if (p == last_p)
break;
if (debug)
printf ("tld %ld: %s\n", i, p);
last_p = p;
}
}
}
/*
* Return error-string for libidn status as returned from idna_to_ascii_lz().
*/
const char *Curl_idn_strerror (struct connectdata *conn, int err)
{
#ifdef HAVE_IDNA_STRERROR
(void)conn;
return idna_strerror((Idna_rc) err);
#else
const char *str;
char *buf;
size_t max;
DEBUGASSERT(conn);
buf = conn->syserr_buf;
max = sizeof(conn->syserr_buf)-1;
*buf = '\0';
#ifndef CURL_DISABLE_VERBOSE_STRINGS
switch ((Idna_rc)err) {
case IDNA_SUCCESS:
str = "No error";
break;
case IDNA_STRINGPREP_ERROR:
str = "Error in string preparation";
break;
case IDNA_PUNYCODE_ERROR:
str = "Error in Punycode operation";
break;
case IDNA_CONTAINS_NON_LDH:
str = "Illegal ASCII characters";
break;
case IDNA_CONTAINS_MINUS:
str = "Contains minus";
break;
case IDNA_INVALID_LENGTH:
str = "Invalid output length";
break;
case IDNA_NO_ACE_PREFIX:
str = "No ACE prefix (\"xn--\")";
break;
case IDNA_ROUNDTRIP_VERIFY_ERROR:
str = "Round trip verify error";
break;
case IDNA_CONTAINS_ACE_PREFIX:
str = "Already have ACE prefix (\"xn--\")";
break;
case IDNA_ICONV_ERROR:
str = "Locale conversion failed";
break;
case IDNA_MALLOC_ERROR:
str = "Allocation failed";
break;
case IDNA_DLOPEN_ERROR:
str = "dlopen() error";
break;
default:
snprintf(buf, max, "error %d", err);
str = NULL;
break;
}
#else
if((Idna_rc)err == IDNA_SUCCESS)
str = "No error";
else
str = "Error";
#endif
if(str)
strncpy(buf, str, max);
buf[max] = '\0';
return (buf);
#endif
}
/**
* Add a DNS name to the UDP packet at the given location, converting
* the name to IDNA notation as necessary.
*
* @param dst where to write the name (UDP packet)
* @param dst_len number of bytes in @a dst
* @param off pointer to offset where to write the name (increment by bytes used)
* must not be changed if there is an error
* @param name name to write
* @return #GNUNET_SYSERR if @a name is invalid
* #GNUNET_NO if @a name did not fit
* #GNUNET_OK if @a name was added to @a dst
*/
int
GNUNET_DNSPARSER_builder_add_name (char *dst,
size_t dst_len,
size_t *off,
const char *name)
{
const char *dot;
const char *idna_name;
char *idna_start;
size_t start;
size_t pos;
size_t len;
Idna_rc rc;
if (NULL == name)
return GNUNET_SYSERR;
if (IDNA_SUCCESS !=
(rc = idna_to_ascii_8z (name, &idna_start, IDNA_ALLOW_UNASSIGNED)))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Failed to convert UTF-8 name `%s' to DNS IDNA format: %s\n"),
name,
idna_strerror (rc));
return GNUNET_NO;
}
idna_name = idna_start;
start = *off;
if (start + strlen (idna_name) + 2 > dst_len)
goto fail;
pos = start;
do
{
dot = strchr (idna_name, '.');
if (NULL == dot)
len = strlen (idna_name);
else
len = dot - idna_name;
if ( (len >= 64) || (0 == len) )
{
GNUNET_break (0);
goto fail; /* segment too long or empty */
}
dst[pos++] = (char) (uint8_t) len;
GNUNET_memcpy (&dst[pos], idna_name, len);
pos += len;
idna_name += len + 1; /* also skip dot */
}
while (NULL != dot);
dst[pos++] = '\0'; /* terminator */
*off = pos;
#if WINDOWS
idn_free (idna_start);
#else
free (idna_start);
#endif
return GNUNET_OK;
fail:
#if WINDOWS
idn_free (idna_start);
#else
free (idna_start);
#endif
return GNUNET_NO;
}
/**
* Parse name inside of a DNS query or record.
*
* @param udp_payload entire UDP payload
* @param udp_payload_length length of @a udp_payload
* @param off pointer to the offset of the name to parse in the udp_payload (to be
* incremented by the size of the name)
* @param depth current depth of our recursion (to prevent stack overflow)
* @return name as 0-terminated C string on success, NULL if the payload is malformed
*/
static char *
parse_name (const char *udp_payload,
size_t udp_payload_length,
size_t *off,
unsigned int depth)
{
const uint8_t *input = (const uint8_t *) udp_payload;
char *ret;
char *tmp;
char *xstr;
uint8_t len;
size_t xoff;
char *utf8;
Idna_rc rc;
ret = GNUNET_strdup ("");
while (1)
{
if (*off >= udp_payload_length)
{
GNUNET_break_op (0);
goto error;
}
len = input[*off];
if (0 == len)
{
(*off)++;
break;
}
if (len < 64)
{
if (*off + 1 + len > udp_payload_length)
{
GNUNET_break_op (0);
goto error;
}
GNUNET_asprintf (&tmp,
"%.*s",
(int) len,
&udp_payload[*off + 1]);
if (IDNA_SUCCESS !=
(rc = idna_to_unicode_8z8z (tmp, &utf8, IDNA_ALLOW_UNASSIGNED)))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Failed to convert DNS IDNA name `%s' to UTF-8: %s\n"),
tmp,
idna_strerror (rc));
GNUNET_free (tmp);
GNUNET_asprintf (&tmp,
"%s%.*s.",
ret,
(int) len,
&udp_payload[*off + 1]);
}
else
{
GNUNET_free (tmp);
GNUNET_asprintf (&tmp,
"%s%s.",
ret,
utf8);
#if WINDOWS
idn_free (utf8);
#else
free (utf8);
#endif
}
GNUNET_free (ret);
ret = tmp;
*off += 1 + len;
}
else if ((64 | 128) == (len & (64 | 128)) )
{
if (depth > 32)
{
GNUNET_break_op (0);
goto error; /* hard bound on stack to prevent "infinite" recursion, disallow! */
}
/* pointer to string */
if (*off + 1 > udp_payload_length)
{
GNUNET_break_op (0);
goto error;
}
xoff = ((len - (64 | 128)) << 8) + input[*off+1];
xstr = parse_name (udp_payload,
udp_payload_length,
&xoff,
depth + 1);
if (NULL == xstr)
{
GNUNET_break_op (0);
goto error;
}
GNUNET_asprintf (&tmp,
"%s%s.",
ret,
xstr);
GNUNET_free (ret);
GNUNET_free (xstr);
ret = tmp;
if (strlen (ret) > udp_payload_length)
{
GNUNET_break_op (0);
goto error; /* we are looping (building an infinite string) */
}
*off += 2;
/* pointers always terminate names */
break;
}
else
{
/* neither pointer nor inline string, not supported... */
GNUNET_break_op (0);
goto error;
}
}
if (0 < strlen(ret))
ret[strlen(ret)-1] = '\0'; /* eat tailing '.' */
return ret;
error:
GNUNET_break_op (0);
GNUNET_free (ret);
return NULL;
}
const char *wget_str_to_ascii(const char *src)
{
#ifdef WITH_LIBIDN2
if (wget_str_needs_encoding(src)) {
char *asc = NULL;
int rc;
#ifdef WITH_LIBUNISTRING
uint8_t *lower, resbuf[256];
size_t len = sizeof(resbuf) - 1; // leave space for additional \0 byte
// we need a conversion to lowercase
lower = u8_tolower((uint8_t *)src, u8_strlen((uint8_t *)src), 0, UNINORM_NFKC, resbuf, &len);
if (!lower) {
error_printf("u8_tolower(%s) failed (%d)\n", src, errno);
return src;
}
// u8_tolower() does not terminate the result string
if (lower == resbuf) {
lower[len]=0;
} else {
uint8_t *tmp = lower;
lower = (uint8_t *)wget_strmemdup((char *)lower, len);
xfree(tmp);
}
if ((rc = idn2_lookup_u8(lower, (uint8_t **)&asc, 0)) == IDN2_OK) {
debug_printf("idn2 '%s' -> '%s'\n", src, asc);
src = asc;
} else
error_printf(_("toASCII(%s) failed (%d): %s\n"), lower, rc, idn2_strerror(rc));
if (lower != resbuf)
xfree(lower);
#else
if ((rc = idn2_lookup_u8((uint8_t *)src, (uint8_t **)&asc, 0)) == IDN2_OK) {
debug_printf("idn2 '%s' -> '%s'\n", src, asc);
src = asc;
} else
error_printf(_("toASCII(%s) failed (%d): %s\n"), src, rc, idn2_strerror(rc));
#endif
}
#elif WITH_LIBIDN
if (wget_str_needs_encoding(src)) {
char *asc = NULL;
int rc;
if (_utf8_is_valid(src)) {
// idna_to_ascii_8z() automatically converts UTF-8 to lowercase
if ((rc = idna_to_ascii_8z(src, &asc, IDNA_USE_STD3_ASCII_RULES)) == IDNA_SUCCESS) {
// debug_printf("toASCII '%s' -> '%s'\n", src, asc);
src = asc;
} else
error_printf(_("toASCII failed (%d): %s\n"), rc, idna_strerror(rc));
}
else
error_printf(_("Invalid UTF-8 sequence not converted: '%s'\n"), src);
}
#else
if (wget_str_needs_encoding(src)) {
error_printf(_("toASCII not available: '%s'\n"), src);
}
#endif
return src;
}
/**
* gnutls_server_name_get:
* @session: is a #gnutls_session_t type.
* @data: will hold the data
* @data_length: will hold the data length. Must hold the maximum size of data.
* @type: will hold the server name indicator type
* @indx: is the index of the server_name
*
* This function will allow you to get the name indication (if any), a
* client has sent. The name indication may be any of the enumeration
* gnutls_server_name_type_t.
*
* If @type is GNUTLS_NAME_DNS, then this function is to be used by
* servers that support virtual hosting, and the data will be a null
* terminated IDNA ACE string (prior to GnuTLS 3.4.0 it was a UTF-8 string).
*
* If @data has not enough size to hold the server name
* GNUTLS_E_SHORT_MEMORY_BUFFER is returned, and @data_length will
* hold the required size.
*
* @index is used to retrieve more than one server names (if sent by
* the client). The first server name has an index of 0, the second 1
* and so on. If no name with the given index exists
* GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned,
* otherwise a negative error code is returned.
**/
int
gnutls_server_name_get(gnutls_session_t session, void *data,
size_t * data_length,
unsigned int *type, unsigned int indx)
{
char *_data = data;
server_name_ext_st *priv;
int ret;
#ifdef HAVE_LIBIDN
int rc;
char *idn_name = NULL;
#endif
extension_priv_data_t epriv;
gnutls_datum name;
if (session->security_parameters.entity == GNUTLS_CLIENT) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
ret =
_gnutls_ext_get_session_data(session,
GNUTLS_EXTENSION_SERVER_NAME,
&epriv);
if (ret < 0) {
gnutls_assert();
return GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;
}
priv = epriv;
if (indx + 1 > priv->server_names_size) {
return GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE;
}
*type = priv->server_names[indx].type;
#ifdef HAVE_LIBIDN
rc = idna_to_ascii_8z ((char*)priv->server_names[indx].name, &idn_name, IDNA_ALLOW_UNASSIGNED);
if (rc != IDNA_SUCCESS) {
_gnutls_debug_log("unable to convert name %s to IDNA format: %s\n", (char*)priv->server_names[indx].name, idna_strerror(rc));
return GNUTLS_E_IDNA_ERROR;
}
name.data = (unsigned char*)idn_name;
name.size = strlen(idn_name);
#else
name.data = priv->server_names[indx].name;
name.size = priv->server_names[indx].name_length;
#endif
if (*data_length > /* greater since we need one extra byte for the null */
name.size) {
*data_length = name.size;
memcpy(data, name.data, *data_length);
if (*type == GNUTLS_NAME_DNS) /* null terminate */
_data[(*data_length)] = 0;
} else {
*data_length = name.size + 1;
ret = GNUTLS_E_SHORT_MEMORY_BUFFER;
goto cleanup;
}
ret = 0;
cleanup:
#ifdef HAVE_LIBIDN
idn_free(idn_name);
#endif
return ret;
}
int
main (int argc, char *argv[])
{
char buf[BUFSIZ];
char *p;
uint32_t *r;
int rc;
size_t errpos, i;
printf ("Input domain encoded as `%s': ", stringprep_locale_charset ());
fflush (stdout);
fgets (buf, BUFSIZ, stdin);
buf[strlen (buf) - 1] = '\0';
printf ("Read string (length %d): ", strlen (buf));
for (i = 0; i < strlen (buf); i++)
printf ("%02x ", buf[i] & 0xFF);
printf ("\n");
p = stringprep_locale_to_utf8 (buf);
if (p)
{
strcpy (buf, p);
free (p);
}
else
printf ("Could not convert string to UTF-8, continuing anyway...\n");
rc = idna_to_ascii_8z (buf, &p, 0);
if (rc != IDNA_SUCCESS)
{
printf ("idna_to_ascii_8z failed (%d): %s\n", rc, idna_strerror (rc));
return 2;
}
printf ("ToASCII string (length %d): %s\n", strlen (p), p);
rc = idna_to_unicode_8z4z (p, &r, 0);
free (p);
if (rc != IDNA_SUCCESS)
{
printf ("idna_to_unicode_8z4z failed (%d): %s\n",
rc, idna_strerror (rc));
return 2;
}
printf ("ToUnicode string: ");
for (i = 0; r[i]; i++)
printf ("U+%04x ", r[i]);
printf ("\n");
rc = tld_check_4z (r, &errpos, NULL);
free (r);
if (rc == TLD_INVALID)
{
printf ("Domain rejected by TLD check, Unicode position %d\n", errpos);
return 1;
}
else if (rc != TLD_SUCCESS)
{
printf ("tld_check_4z() failed (%d): %s\n", rc, tld_strerror (rc));
return 2;
}
printf ("Domain accepted by TLD check\n");
return 0;
}
MGET_IRI *mget_iri_parse(const char *s_uri, const char *encoding)
{
MGET_IRI *iri;
const char *default_port = NULL;
char *p, *s, *authority, c;
size_t slen, it;
if (!s_uri)
return NULL;
/*
URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
hier-part = "//" authority path-abempty / path-absolute / path-rootless / path-empty
scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
*/
while (isspace(*s_uri)) s_uri++;
if (!*s_uri) return NULL;
// just use one block of memory for all parsed URI parts
slen = strlen(s_uri);
iri = xmalloc(sizeof(MGET_IRI) + slen * 2 + 2);
memset(iri, 0, sizeof(MGET_IRI));
strcpy(((char *)iri) + sizeof(MGET_IRI), s_uri);
iri->uri = ((char *)iri) + sizeof(MGET_IRI);
s = ((char *)iri) + sizeof(MGET_IRI) + slen + 1;
strcpy(s, s_uri);
p = s;
while (*s && !_iri_isgendelim(*s))
s++;
if (*s == ':' && s[1]=='/') {
// found a scheme
*s++ = 0;
// find the scheme in our static list of supported schemes
// for later comparisons we compare pointers (avoiding strcasecmnp())
iri->scheme = p;
for (it = 0; iri_schemes[it]; it++) {
if (!strcasecmp(iri_schemes[it], p)) {
iri->scheme = iri_schemes[it];
default_port = iri_ports[it];
break;
}
}
if (iri->scheme == p) {
// convert scheme to lowercase
for (; *p; p++)
if (isupper(*p))
*p = tolower(*p);
}
} else {
iri->scheme = IRI_SCHEME_DEFAULT;
default_port = iri_ports[0]; // port 80
s = p; // rewind
}
// this is true for http, https, ftp, file
if (s[0] == '/' && s[1] == '/')
s += 2;
// authority
authority = s;
while (*s && *s != '/' && *s != '?' && *s != '#')
s++;
c = *s;
if (c) *s++ = 0;
// left over: [path][?query][#fragment]
if (c == '/') {
iri->path = s;
while (*s && *s != '?' && *s != '#')
s++;
c = *s;
if (c) *s++ = 0;
}
if (c == '?') {
iri->query = s;
while (*s && *s != '#')
s++;
c = *s;
if (c) *s++ = 0;
}
if (c == '#') {
iri->fragment = s;
while (*s)
s++;
}
if (*s) {
debug_printf("unparsed rest '%s'\n", s);
}
if (*authority) {
s = authority;
p = strchr(authority, '@');
if (p) {
iri->userinfo = s;
*p = 0;
s = p + 1;
}
if (*s == '[') {
p = strrchr(s, ']');
if (p) {
iri->host = s + 1;
*p = 0;
s = p + 1;
} else {
// something is broken
iri->host = s + 1;
while (*s) s++;
}
} else {
iri->host = s;
while (*s && *s != ':')
s++;
}
if (*s == ':') {
if (s[1]) {
if (!default_port || (strcmp(s + 1, default_port) && atoi(s + 1) != atoi(default_port)))
iri->port = s + 1;
}
}
*s = 0;
/*
for (p = (char *)iri->host; *p; p++)
if (*p >= 'A' && *p <= 'Z') // isupper() also returns true for chars > 0x7f, the test is not EBCDIC compatible ;-)
*p = tolower(*p);
*/
}
iri->resolv_port = iri->port ? iri->port : default_port;
// now unescape all components (not interested in display, userinfo, password
if (iri->host) {
const char *host_utf;
char *p;
_unescape((unsigned char *)iri->host);
host_utf = mget_str_to_utf8(iri->host, encoding);
if (host_utf) {
char *host_asc = NULL;
int rc;
if ((rc = idna_to_ascii_8z(host_utf, &host_asc, IDNA_USE_STD3_ASCII_RULES)) == IDNA_SUCCESS) {
// log_printf("toASCII '%s' -> '%s'\n", host_utf, host_asc);
iri->host = host_asc;
iri->host_allocated = 1;
} else
error_printf(_("toASCII failed (%d): %s\n"), rc, idna_strerror(rc));
xfree(host_utf);
}
for (p = (char *)iri->host; *p; p++)
if (*p >= 'A' && *p <= 'Z') // isupper() also returns true for chars > 0x7f, the test is not EBCDIC compatible ;-)
*p = tolower(*p);
}
else {
if (iri->scheme == IRI_SCHEME_HTTP || iri->scheme == IRI_SCHEME_HTTPS) {
error_printf(_("Missing host/domain in URI '%s'\n"), iri->uri);
mget_iri_free(&iri);
return NULL;
}
}
if (iri->path)
_unescape((unsigned char *)iri->path);
if (iri->query)
_unescape((unsigned char *)iri->query);
if (iri->fragment)
_unescape((unsigned char *)iri->fragment);
// info_printf("%s: path '%s'\n", iri->uri, iri->path);
return iri;
}
/**
* gnutls_server_name_set:
* @session: is a #gnutls_session_t type.
* @type: specifies the indicator type
* @name: is a string that contains the server name.
* @name_length: holds the length of name
*
* This function is to be used by clients that want to inform (via a
* TLS extension mechanism) the server of the name they connected to.
* This should be used by clients that connect to servers that do
* virtual hosting.
*
* The value of @name depends on the @type type. In case of
* %GNUTLS_NAME_DNS, a UTF-8 null-terminated domain name string,
* without the trailing dot, is expected.
*
* IPv4 or IPv6 addresses are not permitted.
*
* Returns: On success, %GNUTLS_E_SUCCESS (0) is returned,
* otherwise a negative error code is returned.
**/
int
gnutls_server_name_set(gnutls_session_t session,
gnutls_server_name_type_t type,
const void *name, size_t name_length)
{
int server_names, ret;
server_name_ext_st *priv;
extension_priv_data_t epriv;
char *idn_name = NULL;
int set = 0, rc;
if (session->security_parameters.entity == GNUTLS_SERVER) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
if (name_length == 0) { /* unset extension */
_gnutls_ext_unset_session_data(session, GNUTLS_EXTENSION_SERVER_NAME);
return 0;
}
#ifdef HAVE_LIBIDN
rc = idna_to_ascii_8z (name, &idn_name, IDNA_ALLOW_UNASSIGNED);
if (rc != IDNA_SUCCESS) {
_gnutls_debug_log("unable to convert name %s to IDNA format: %s\n", (char*)name, idna_strerror(rc));
return GNUTLS_E_IDNA_ERROR;
}
name = idn_name;
name_length = strlen(idn_name);
#endif
if (name_length > MAX_SERVER_NAME_SIZE) {
ret = GNUTLS_E_SHORT_MEMORY_BUFFER;
goto cleanup;
}
ret =
_gnutls_ext_get_session_data(session,
GNUTLS_EXTENSION_SERVER_NAME,
&epriv);
if (ret < 0) {
set = 1;
}
if (set != 0) {
priv = gnutls_calloc(1, sizeof(*priv));
if (priv == NULL) {
gnutls_assert();
return GNUTLS_E_MEMORY_ERROR;
}
epriv = priv;
} else
priv = epriv;
server_names = priv->server_names_size + 1;
if (server_names > MAX_SERVER_NAME_EXTENSIONS)
server_names = MAX_SERVER_NAME_EXTENSIONS;
priv->server_names[server_names - 1].type = type;
memcpy(priv->server_names[server_names - 1].name, name,
name_length);
priv->server_names[server_names - 1].name_length = name_length;
priv->server_names_size = server_names;
if (set != 0)
_gnutls_ext_set_session_data(session,
GNUTLS_EXTENSION_SERVER_NAME,
epriv);
ret = 0;
cleanup:
#ifdef HAVE_LIBIDN
idn_free(idn_name);
#endif
return ret;
}
int
get_addrs (char *my_machine_name, char *his_machine_name)
{
#if HAVE_DECL_GETADDRINFO || defined HAVE_IDN
int err;
#endif
char *lhost, *rhost;
#if HAVE_DECL_GETADDRINFO
struct addrinfo hints, *res, *ai;
#else /* !HAVE_DECL_GETADDRINFO */
struct hostent *hp;
#endif
struct servent *sp;
#ifdef HAVE_IDN
err = idna_to_ascii_lz (my_machine_name, &lhost, 0);
if (err)
{
fprintf (stderr, "talk: %s: %s\n",
my_machine_name, idna_strerror (err));
exit (-1);
}
err = idna_to_ascii_lz (his_machine_name, &rhost, 0);
if (err)
{
fprintf (stderr, "talk: %s: %s\n",
his_machine_name, idna_strerror (err));
exit (-1);
}
#else /* !HAVE_IDN */
lhost = my_machine_name;
rhost = his_machine_name;
#endif
msg.pid = htonl (getpid ());
/* Look up the address of the local host. */
#if HAVE_DECL_GETADDRINFO
memset (&hints, 0, sizeof (hints));
/* The talk-protocol is IPv4 only! */
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
# ifdef AI_IDN
hints.ai_flags |= AI_IDN;
# endif
err = getaddrinfo (lhost, NULL, &hints, &res);
if (err)
{
fprintf (stderr, "talk: %s: %s\n", lhost, gai_strerror (err));
exit (-1);
}
/* Perform all sanity checks available.
* Reduction of tests?
*/
for (ai = res; ai; ai = ai->ai_next)
{
int f;
if (ai->ai_family != AF_INET)
continue;
f = socket (ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (f < 0)
continue;
/* Attempt binding to this local address. */
if (bind (f, ai->ai_addr, ai->ai_addrlen))
{
close (f);
f = -1;
continue;
}
/* We have a usable address. */
close (f);
break;
}
if (ai)
memcpy (&my_machine_addr,
&((struct sockaddr_in *) ai->ai_addr)->sin_addr,
sizeof (my_machine_addr));
freeaddrinfo (res);
if (!ai)
{
fprintf (stderr, "talk: %s: %s\n", lhost, "address not found");
exit (-1);
}
#else /* !HAVE_DECL_GETADDRINFO */
hp = gethostbyname (lhost);
if (hp == NULL)
{
fprintf (stderr, "talk: %s(%s): ", lhost, my_machine_name);
herror ((char *) NULL);
exit (-1);
}
memmove (&my_machine_addr, hp->h_addr, hp->h_length);
#endif /* !HAVE_DECL_GETADDRINFO */
/*
* If the callee is on-machine, just copy the
* network address, otherwise do a lookup...
*/
if (strcmp (rhost, lhost))
{
#if HAVE_DECL_GETADDRINFO
err = getaddrinfo (rhost, NULL, &hints, &res);
if (err)
{
fprintf (stderr, "talk: %s: %s\n", rhost, gai_strerror (err));
exit (-1);
}
/* Perform all sanity checks available. */
for (ai = res; ai; ai = ai->ai_next)
{
int f;
if (ai->ai_family != AF_INET)
continue;
f = socket (ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if (f < 0)
continue;
/* We have a usable address family! */
close (f);
break;
}
if (ai)
memcpy (&his_machine_addr,
&((struct sockaddr_in *) ai->ai_addr)->sin_addr,
sizeof (his_machine_addr));
freeaddrinfo (res);
if (!ai)
{
fprintf (stderr, "talk: %s: %s\n", rhost, "address not found");
exit (-1);
}
#else /* !HAVE_DECL_GETADDRINFO */
hp = gethostbyname (rhost);
if (hp == NULL)
{
fprintf (stderr, "talk: %s(%s): ", rhost, his_machine_name);
herror ((char *) NULL);
exit (-1);
}
memmove (&his_machine_addr, hp->h_addr, hp->h_length);
#endif /* !HAVE_DECL_GETADDRINFO */
}
else
his_machine_addr = my_machine_addr;
/* Find the server's port. */
sp = getservbyname ("ntalk", "udp");
if (sp == 0)
{
fprintf (stderr, "talk: %s/%s: service is not registered.\n",
"ntalk", "udp");
exit (-1);
}
daemon_port = ntohs (sp->s_port);
#ifdef HAVE_IDN
free (lhost);
free (rhost);
#endif
return 0;
}