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HardenedBSD/contrib/ldns/str2host.c
Dag-Erling Smørgrav 5afab0e5e5 ldns: Upgrade to 1.8.3. 
Merge commit 'cf3e3d5bd0a1fae39c74c7db5a4e8b10732d0766'

Reviewed by:	emaste
Differential Revision:	https://reviews.freebsd.org/D40226
2023-05-24 15:50:18 +00:00

2439 lines
58 KiB
C
Raw Blame History

/*
* str2host.c
*
* conversion routines from the presentation format
* to the host format
*
* a Net::DNS like library for C
*
* (c) NLnet Labs, 2004-2006
*
* See the file LICENSE for the license
*/
#include <ldns/config.h>
#include <ldns/ldns.h>
#include <ldns/internal.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include <time.h>
#include <errno.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#include <limits.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
ldns_status
ldns_str2rdf_int16(ldns_rdf **rd, const char *shortstr)
{
char *end = NULL;
uint16_t *r;
r = LDNS_MALLOC(uint16_t);
if(!r) return LDNS_STATUS_MEM_ERR;
*r = htons((uint16_t)strtol((char *)shortstr, &end, 10));
if(*end != 0) {
LDNS_FREE(r);
return LDNS_STATUS_INVALID_INT;
} else {
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_INT16, sizeof(uint16_t), r);
LDNS_FREE(r);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
}
ldns_status
ldns_str2rdf_time(ldns_rdf **rd, const char *time)
{
/* convert a time YYYYDDMMHHMMSS to wireformat */
uint32_t *r = NULL;
struct tm tm;
uint32_t l;
char *end;
/* Try to scan the time... */
r = (uint32_t *)LDNS_MALLOC(uint32_t);
if(!r) return LDNS_STATUS_MEM_ERR;
memset(&tm, 0, sizeof(tm));
if (strlen(time) == 14 &&
sscanf(time, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) == 6
) {
tm.tm_year -= 1900;
tm.tm_mon--;
/* Check values */
if (tm.tm_year < 70) {
goto bad_format;
}
if (tm.tm_mon < 0 || tm.tm_mon > 11) {
goto bad_format;
}
if (tm.tm_mday < 1 || tm.tm_mday > 31) {
goto bad_format;
}
if (tm.tm_hour < 0 || tm.tm_hour > 23) {
goto bad_format;
}
if (tm.tm_min < 0 || tm.tm_min > 59) {
goto bad_format;
}
if (tm.tm_sec < 0 || tm.tm_sec > 59) {
goto bad_format;
}
l = htonl(ldns_mktime_from_utc(&tm));
memcpy(r, &l, sizeof(uint32_t));
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_TIME, sizeof(uint32_t), r);
LDNS_FREE(r);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
} else {
/* handle it as 32 bits timestamp */
l = htonl((uint32_t)strtol((char*)time, &end, 10));
if(*end != 0) {
LDNS_FREE(r);
return LDNS_STATUS_ERR;
} else {
memcpy(r, &l, sizeof(uint32_t));
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_INT32, sizeof(uint32_t), r);
LDNS_FREE(r);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
}
bad_format:
LDNS_FREE(r);
return LDNS_STATUS_INVALID_TIME;
}
ldns_status
ldns_str2rdf_nsec3_salt(ldns_rdf **rd, const char *salt_str)
{
uint8_t salt_length;
int c;
int salt_length_str;
uint8_t *salt;
uint8_t *data;
if(rd == NULL) {
return LDNS_STATUS_NULL;
}
salt_length_str = (int)strlen(salt_str);
if (salt_length_str == 1 && salt_str[0] == '-') {
salt_length_str = 0;
} else if (salt_length_str % 2 != 0) {
return LDNS_STATUS_INVALID_HEX;
}
if (salt_length_str > 512) {
return LDNS_STATUS_INVALID_HEX;
}
salt = LDNS_XMALLOC(uint8_t, salt_length_str / 2);
if(!salt) {
return LDNS_STATUS_MEM_ERR;
}
for (c = 0; c < salt_length_str; c += 2) {
if (isxdigit((int) salt_str[c]) && isxdigit((int) salt_str[c+1])) {
salt[c/2] = (uint8_t) ldns_hexdigit_to_int(salt_str[c]) * 16 +
ldns_hexdigit_to_int(salt_str[c+1]);
} else {
LDNS_FREE(salt);
return LDNS_STATUS_INVALID_HEX;
}
}
salt_length = (uint8_t) (salt_length_str / 2);
data = LDNS_XMALLOC(uint8_t, 1 + salt_length);
if(!data) {
LDNS_FREE(salt);
return LDNS_STATUS_MEM_ERR;
}
data[0] = salt_length;
memcpy(&data[1], salt, salt_length);
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_NSEC3_SALT, 1 + salt_length, data);
LDNS_FREE(data);
LDNS_FREE(salt);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_period(ldns_rdf **rd,const char *period)
{
uint32_t p;
const char *end;
/* Allocate required space... */
p = ldns_str2period(period, &end);
if (*end != 0) {
return LDNS_STATUS_ERR;
} else {
p = (uint32_t) htonl(p);
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_PERIOD, sizeof(uint32_t), &p);
}
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_int32(ldns_rdf **rd, const char *longstr)
{
char *end;
uint32_t *r = NULL;
uint32_t l;
r = (uint32_t*)LDNS_MALLOC(uint32_t);
if(!r) return LDNS_STATUS_MEM_ERR;
errno = 0; /* must set to zero before call,
note race condition on errno */
if(*longstr == '-')
l = htonl((uint32_t)strtol((char*)longstr, &end, 10));
else l = htonl((uint32_t)strtoul((char*)longstr, &end, 10));
if(*end != 0) {
LDNS_FREE(r);
return LDNS_STATUS_ERR;
} else {
if (errno == ERANGE) {
LDNS_FREE(r);
return LDNS_STATUS_SYNTAX_INTEGER_OVERFLOW;
}
memcpy(r, &l, sizeof(uint32_t));
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_INT32, sizeof(uint32_t), r);
LDNS_FREE(r);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
}
ldns_status
ldns_str2rdf_int8(ldns_rdf **rd, const char *bytestr)
{
char *end;
uint8_t *r = NULL;
r = LDNS_MALLOC(uint8_t);
if(!r) return LDNS_STATUS_MEM_ERR;
*r = (uint8_t)strtol((char*)bytestr, &end, 10);
if(*end != 0) {
LDNS_FREE(r);
return LDNS_STATUS_ERR;
} else {
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_INT8, sizeof(uint8_t), r);
LDNS_FREE(r);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
}
/*
* Checks whether the escaped value at **s is an decimal value or
* a 'normally' escaped character (and not eos)
*
* The string pointer at *s is increased by either 0 (on error), 1 (on
* normal escapes), or 3 (on decimals)
*
* Returns the number of bytes read from the escaped string, or
* 0 on error
*/
INLINE bool
parse_escape(uint8_t *ch_p, const char** str_p)
{
uint16_t val;
if ((*str_p)[0] && isdigit((unsigned char)(*str_p)[0]) &&
(*str_p)[1] && isdigit((unsigned char)(*str_p)[1]) &&
(*str_p)[2] && isdigit((unsigned char)(*str_p)[2])) {
val = (uint16_t)(((*str_p)[0] - '0') * 100 +
((*str_p)[1] - '0') * 10 +
((*str_p)[2] - '0'));
if (val > 255) {
goto error;
}
*ch_p = (uint8_t)val;
*str_p += 3;
return true;
} else if ((*str_p)[0] && !isdigit((unsigned char)(*str_p)[0])) {
*ch_p = (uint8_t)*(*str_p)++;
return true;
}
error:
*str_p = NULL;
return false; /* LDNS_STATUS_SYNTAX_BAD_ESCAPE */
}
INLINE bool
parse_char(uint8_t *ch_p, const char** str_p)
{
switch (**str_p) {
case '\0': return false;
case '\\': *str_p += 1;
return parse_escape(ch_p, str_p);
default: *ch_p = (uint8_t)*(*str_p)++;
return true;
}
}
/*
* No special care is taken, all dots are translated into
* label separators.
* Could be made more efficient....we do 3 memcpy's in total...
*/
ldns_status
ldns_str2rdf_dname(ldns_rdf **d, const char *str)
{
size_t len;
const char *s;
uint8_t *q, *pq, label_len;
uint8_t buf[LDNS_MAX_DOMAINLEN + 1];
*d = NULL;
len = strlen((char*)str);
/* octet representation can make strings a lot longer than actual length */
if (len > LDNS_MAX_DOMAINLEN * 4) {
return LDNS_STATUS_DOMAINNAME_OVERFLOW;
}
if (0 == len) {
return LDNS_STATUS_DOMAINNAME_UNDERFLOW;
}
/* root label */
if (1 == len && *str == '.') {
*d = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_DNAME, 1, "\0");
return LDNS_STATUS_OK;
}
/* get on with the rest */
/* s is on the current character in the string
* pq points to where the labellength is going to go
* label_len keeps track of the current label's length
* q builds the dname inside the buf array
*/
len = 0;
q = buf+1;
pq = buf;
label_len = 0;
for (s = str; *s; s++, q++) {
if (q >= buf + LDNS_MAX_DOMAINLEN) {
return LDNS_STATUS_DOMAINNAME_OVERFLOW;
}
*q = 0;
switch (*s) {
case '.':
if (label_len > LDNS_MAX_LABELLEN) {
return LDNS_STATUS_LABEL_OVERFLOW;
}
if (label_len == 0) {
return LDNS_STATUS_EMPTY_LABEL;
}
len += label_len + 1;
*pq = label_len;
label_len = 0;
pq = q;
break;
case '\\':
/* octet value or literal char */
s += 1;
if (! parse_escape(q, &s)) {
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
}
s -= 1;
label_len++;
break;
default:
*q = (uint8_t)*s;
label_len++;
}
}
/* add root label if last char was not '.' */
if (!ldns_dname_str_absolute(str)) {
if (q >= buf + LDNS_MAX_DOMAINLEN) {
return LDNS_STATUS_DOMAINNAME_OVERFLOW;
}
if (label_len > LDNS_MAX_LABELLEN) {
return LDNS_STATUS_LABEL_OVERFLOW;
}
if (label_len == 0) { /* label_len 0 but not . at end? */
return LDNS_STATUS_EMPTY_LABEL;
}
len += label_len + 1;
*pq = label_len;
*q = 0;
}
len++;
*d = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_DNAME, len, buf);
return LDNS_STATUS_OK;
}
ldns_status
ldns_str2rdf_a(ldns_rdf **rd, const char *str)
{
in_addr_t address;
if (inet_pton(AF_INET, (char*)str, &address) != 1) {
return LDNS_STATUS_INVALID_IP4;
} else {
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_A, sizeof(address), &address);
}
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_aaaa(ldns_rdf **rd, const char *str)
{
uint8_t address[LDNS_IP6ADDRLEN + 1];
if (inet_pton(AF_INET6, (char*)str, address) != 1) {
return LDNS_STATUS_INVALID_IP6;
} else {
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_AAAA, sizeof(address) - 1, &address);
}
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_str(ldns_rdf **rd, const char *str)
{
uint8_t *data, *dp, ch = 0;
size_t length;
/* Worst case space requirement. We'll realloc to actual size later. */
dp = data = LDNS_XMALLOC(uint8_t, strlen(str) > 255 ? 256 : (strlen(str) + 1));
if (! data) {
return LDNS_STATUS_MEM_ERR;
}
/* Fill data (up to 255 characters) */
while (parse_char(&ch, &str)) {
if (dp - data >= 255) {
LDNS_FREE(data);
return LDNS_STATUS_INVALID_STR;
}
*++dp = ch;
}
if (! str) {
LDNS_FREE(data);
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
}
length = (size_t)(dp - data);
/* Fix last length byte */
data[0] = (uint8_t)length;
/* Lose the overmeasure */
data = LDNS_XREALLOC(dp = data, uint8_t, length + 1);
if (! data) {
LDNS_FREE(dp);
return LDNS_STATUS_MEM_ERR;
}
/* Create rdf */
*rd = ldns_rdf_new(LDNS_RDF_TYPE_STR, length + 1, data);
if (! *rd) {
LDNS_FREE(data);
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
ldns_status
ldns_str2rdf_apl(ldns_rdf **rd, const char *str)
{
const char *my_str = str;
char *my_ip_str;
size_t ip_str_len;
uint16_t family;
bool negation;
uint8_t afdlength = 0;
uint8_t *afdpart;
uint8_t prefix;
uint8_t *data;
size_t i = 0;
/* [!]afi:address/prefix */
if (strlen(my_str) < 2
|| strchr(my_str, ':') == NULL
|| strchr(my_str, '/') == NULL
|| strchr(my_str, ':') > strchr(my_str, '/')) {
return LDNS_STATUS_INVALID_STR;
}
if (my_str[0] == '!') {
negation = true;
my_str += 1;
} else {
negation = false;
}
family = (uint16_t) atoi(my_str);
my_str = strchr(my_str, ':') + 1;
/* need ip addr and only ip addr for inet_pton */
ip_str_len = (size_t) (strchr(my_str, '/') - my_str);
my_ip_str = LDNS_XMALLOC(char, ip_str_len + 1);
if(!my_ip_str) return LDNS_STATUS_MEM_ERR;
strncpy(my_ip_str, my_str, ip_str_len + 1);
my_ip_str[ip_str_len] = '\0';
if (family == 1) {
/* ipv4 */
afdpart = LDNS_XMALLOC(uint8_t, 4);
if(!afdpart) {
LDNS_FREE(my_ip_str);
return LDNS_STATUS_MEM_ERR;
}
if (inet_pton(AF_INET, my_ip_str, afdpart) == 0) {
LDNS_FREE(my_ip_str);
LDNS_FREE(afdpart);
return LDNS_STATUS_INVALID_STR;
}
for (i = 0; i < 4; i++) {
if (afdpart[i] != 0) {
afdlength = i + 1;
}
}
} else if (family == 2) {
/* ipv6 */
afdpart = LDNS_XMALLOC(uint8_t, 16);
if(!afdpart) {
LDNS_FREE(my_ip_str);
return LDNS_STATUS_MEM_ERR;
}
if (inet_pton(AF_INET6, my_ip_str, afdpart) == 0) {
LDNS_FREE(my_ip_str);
LDNS_FREE(afdpart);
return LDNS_STATUS_INVALID_STR;
}
for (i = 0; i < 16; i++) {
if (afdpart[i] != 0) {
afdlength = i + 1;
}
}
} else {
/* unknown family */
LDNS_FREE(my_ip_str);
return LDNS_STATUS_INVALID_STR;
}
my_str = strchr(my_str, '/') + 1;
prefix = (uint8_t) atoi(my_str);
data = LDNS_XMALLOC(uint8_t, 4 + afdlength);
if(!data) {
LDNS_FREE(afdpart);
LDNS_FREE(my_ip_str);
return LDNS_STATUS_INVALID_STR;
}
ldns_write_uint16(data, family);
data[2] = prefix;
data[3] = afdlength;
if (negation) {
/* set bit 1 of byte 3 */
data[3] = data[3] | 0x80;
}
memcpy(data + 4, afdpart, afdlength);
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_APL, afdlength + 4, data);
LDNS_FREE(afdpart);
LDNS_FREE(data);
LDNS_FREE(my_ip_str);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_b64(ldns_rdf **rd, const char *str)
{
uint8_t *buffer;
int16_t i;
if ((*str == '-' || *str == '0') && str[1] == '\0') {
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_B64, 0, NULL);
return *rd ? LDNS_STATUS_OK : LDNS_STATUS_MEM_ERR;
}
buffer = LDNS_XMALLOC(uint8_t, ldns_b64_ntop_calculate_size(strlen(str)));
if(!buffer) {
return LDNS_STATUS_MEM_ERR;
}
i = (uint16_t)ldns_b64_pton((const char*)str, buffer,
ldns_b64_ntop_calculate_size(strlen(str)));
if (-1 == i) {
LDNS_FREE(buffer);
return LDNS_STATUS_INVALID_B64;
} else {
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_B64, (uint16_t) i, buffer);
}
LDNS_FREE(buffer);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_b32_ext(ldns_rdf **rd, const char *str)
{
uint8_t *buffer;
int i;
/* first byte contains length of actual b32 data */
size_t slen = strlen(str);
size_t len = ldns_b32_pton_calculate_size(slen);
if (len > 255) {
return LDNS_STATUS_INVALID_B32_EXT;
}
buffer = LDNS_XMALLOC(uint8_t, len + 1);
if(!buffer) {
return LDNS_STATUS_MEM_ERR;
}
buffer[0] = len;
i = ldns_b32_pton_extended_hex((const char*)str, slen, buffer + 1,
ldns_b32_ntop_calculate_size(slen));
if (i < 0) {
LDNS_FREE(buffer);
return LDNS_STATUS_INVALID_B32_EXT;
} else {
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_B32_EXT, (uint16_t) i + 1, buffer);
}
LDNS_FREE(buffer);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_hex(ldns_rdf **rd, const char *str)
{
uint8_t *t, *t_orig;
int i;
size_t len;
len = strlen(str);
if (len > LDNS_MAX_RDFLEN * 2) {
return LDNS_STATUS_LABEL_OVERFLOW;
} else {
t = LDNS_XMALLOC(uint8_t, (len / 2) + 1);
if(!t) {
return LDNS_STATUS_MEM_ERR;
}
t_orig = t;
/* Now process octet by octet... */
while (*str) {
*t = 0;
if (isspace((int) *str)) {
str++;
} else {
for (i = 16; i >= 1; i -= 15) {
while (*str && isspace((int) *str)) { str++; }
if (*str) {
if (isxdigit((int) *str)) {
*t += ldns_hexdigit_to_int(*str) * i;
} else {
LDNS_FREE(t_orig);
return LDNS_STATUS_ERR;
}
++str;
}
}
++t;
}
}
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_HEX,
(size_t) (t - t_orig),
t_orig);
LDNS_FREE(t_orig);
}
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_nsec(ldns_rdf **rd, const char *str)
{
const char *delimiters = "\n\t ";
char *token = LDNS_XMALLOC(char, LDNS_MAX_RDFLEN);
ldns_buffer *str_buf;
ssize_t c;
uint16_t cur_type;
size_t type_count = 0;
ldns_rr_type type_list[65536];
if(!token) return LDNS_STATUS_MEM_ERR;
if(rd == NULL) {
LDNS_FREE(token);
return LDNS_STATUS_NULL;
}
str_buf = LDNS_MALLOC(ldns_buffer);
if(!str_buf) {
LDNS_FREE(token);
return LDNS_STATUS_MEM_ERR;
}
ldns_buffer_new_frm_data(str_buf, (char *)str, strlen(str));
if(ldns_buffer_status(str_buf) != LDNS_STATUS_OK) {
LDNS_FREE(str_buf);
LDNS_FREE(token);
return LDNS_STATUS_MEM_ERR;
}
while ((c = ldns_bget_token(str_buf, token, delimiters, LDNS_MAX_RDFLEN)) != -1 && c != 0) {
if(type_count >= sizeof(type_list)) {
LDNS_FREE(str_buf);
LDNS_FREE(token);
return LDNS_STATUS_ERR;
}
cur_type = ldns_get_rr_type_by_name(token);
type_list[type_count] = cur_type;
type_count++;
}
*rd = ldns_dnssec_create_nsec_bitmap(type_list,
type_count,
LDNS_RR_TYPE_NSEC);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_type(ldns_rdf **rd, const char *str)
{
uint16_t type;
type = htons(ldns_get_rr_type_by_name(str));
/* ldns_rr_type is a 16 bit value */
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_TYPE, sizeof(uint16_t), &type);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_class(ldns_rdf **rd, const char *str)
{
uint16_t klass;
klass = htons(ldns_get_rr_class_by_name(str));
/* class is 16 bit */
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_CLASS, sizeof(uint16_t), &klass);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
/* An certificate alg field can either be specified as a 8 bits number
* or by its symbolic name. Handle both
*/
ldns_status
ldns_str2rdf_cert_alg(ldns_rdf **rd, const char *str)
{
ldns_lookup_table *lt;
ldns_status st;
uint8_t idd[2];
lt = ldns_lookup_by_name(ldns_cert_algorithms, str);
st = LDNS_STATUS_OK;
if (lt) {
ldns_write_uint16(idd, (uint16_t) lt->id);
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_INT16, sizeof(uint16_t), idd);
if (!*rd) {
st = LDNS_STATUS_ERR;
}
} else {
/* try as-is (a number) */
st = ldns_str2rdf_int16(rd, str);
if (st == LDNS_STATUS_OK &&
ldns_rdf2native_int16(*rd) == 0) {
st = LDNS_STATUS_CERT_BAD_ALGORITHM;
}
}
return st;
}
static ldns_lookup_table ldns_tlsa_certificate_usages[] = {
{ LDNS_TLSA_USAGE_PKIX_TA , "PKIX-TA" },
{ LDNS_TLSA_USAGE_PKIX_EE , "PKIX-EE" },
{ LDNS_TLSA_USAGE_DANE_TA , "DANE-TA" },
{ LDNS_TLSA_USAGE_DANE_EE , "DANE-EE" },
{ LDNS_TLSA_USAGE_PRIVCERT , "PrivCert" },
{ 0, NULL }
};
static ldns_lookup_table ldns_tlsa_selectors[] = {
{ LDNS_TLSA_SELECTOR_CERT , "Cert" },
{ LDNS_TLSA_SELECTOR_SPKI , "SPKI" },
{ LDNS_TLSA_SELECTOR_PRIVSEL , "PrivSel" },
{ 0, NULL }
};
static ldns_lookup_table ldns_tlsa_matching_types[] = {
{ LDNS_TLSA_MATCHING_TYPE_FULL , "Full" },
{ LDNS_TLSA_MATCHING_TYPE_SHA2_256 , "SHA2-256" },
{ LDNS_TLSA_MATCHING_TYPE_SHA2_512 , "SHA2-512" },
{ LDNS_TLSA_MATCHING_TYPE_PRIVMATCH , "PrivMatch" },
{ 0, NULL }
};
static ldns_status
ldns_str2rdf_mnemonic4int8(ldns_lookup_table *lt,
ldns_rdf **rd, const char *str)
{
if ((lt = ldns_lookup_by_name(lt, str))) {
/* it was given as a integer */
*rd = ldns_native2rdf_int8(LDNS_RDF_TYPE_INT8, (uint8_t) lt->id);
if (!*rd)
return LDNS_STATUS_ERR;
else
return LDNS_STATUS_OK;
}
return ldns_str2rdf_int8(rd, str);
}
/* An alg field can either be specified as a 8 bits number
* or by its symbolic name. Handle both
*/
ldns_status
ldns_str2rdf_alg(ldns_rdf **rd, const char *str)
{
return ldns_str2rdf_mnemonic4int8(ldns_algorithms, rd, str);
}
ldns_status
ldns_str2rdf_certificate_usage(ldns_rdf **rd, const char *str)
{
return ldns_str2rdf_mnemonic4int8(
ldns_tlsa_certificate_usages, rd, str);
}
ldns_status
ldns_str2rdf_selector(ldns_rdf **rd, const char *str)
{
return ldns_str2rdf_mnemonic4int8(ldns_tlsa_selectors, rd, str);
}
ldns_status
ldns_str2rdf_matching_type(ldns_rdf **rd, const char *str)
{
return ldns_str2rdf_mnemonic4int8(ldns_tlsa_matching_types, rd, str);
}
ldns_status
ldns_str2rdf_unknown( ATTR_UNUSED(ldns_rdf **rd)
, ATTR_UNUSED(const char *str)
)
{
/* this should be caught in an earlier time (general str2host for
rr's */
return LDNS_STATUS_NOT_IMPL;
}
ldns_status
ldns_str2rdf_service( ATTR_UNUSED(ldns_rdf **rd)
, ATTR_UNUSED(const char *str)
)
{
/* is this used? is this actually WKS? or SRV? */
return LDNS_STATUS_NOT_IMPL;
}
static int
loc_parse_cm(char* my_str, char** endstr, uint8_t* m, uint8_t* e)
{
/* read <digits>[.<digits>][mM] */
/* into mantissa exponent format for LOC type */
uint32_t meters = 0, cm = 0, val;
char* cm_endstr;
while (isblank((unsigned char)*my_str)) {
my_str++;
}
meters = (uint32_t)strtol(my_str, &my_str, 10);
if (*my_str == '.') {
my_str++;
cm = (uint32_t)strtol(my_str, &cm_endstr, 10);
if (cm_endstr - my_str == 1) cm *= 10;
my_str = cm_endstr;
}
if (meters >= 1) {
*e = 2;
val = meters;
} else {
*e = 0;
val = cm;
}
while(val >= 10) {
(*e)++;
val /= 10;
}
*m = (uint8_t)val;
if (*e > 9)
return 0;
if (*my_str == 'm' || *my_str == 'M') {
my_str++;
}
*endstr = my_str;
return 1;
}
ldns_status
ldns_str2rdf_loc(ldns_rdf **rd, const char *str)
{
uint32_t latitude = 0;
uint32_t longitude = 0;
uint32_t altitude = 0;
uint8_t *data;
uint32_t equator = (uint32_t) ldns_power(2, 31);
uint32_t h = 0;
uint32_t m = 0;
uint8_t size_b = 1, size_e = 2;
uint8_t horiz_pre_b = 1, horiz_pre_e = 6;
uint8_t vert_pre_b = 1, vert_pre_e = 3;
double s = 0.0;
bool northern_hemisphere;
bool eastern_hemisphere;
char *my_str = (char *) str;
/* only support version 0 */
if (isdigit((int) *my_str)) {
h = (uint32_t) strtol(my_str, &my_str, 10);
} else {
return LDNS_STATUS_INVALID_STR;
}
while (isblank((int) *my_str)) {
my_str++;
}
if (isdigit((int) *my_str)) {
m = (uint32_t) strtol(my_str, &my_str, 10);
} else if (*my_str == 'N' || *my_str == 'S') {
goto north;
} else {
return LDNS_STATUS_INVALID_STR;
}
while (isblank((int) *my_str)) {
my_str++;
}
if (isdigit((int) *my_str)) {
s = strtod(my_str, &my_str);
}
north:
while (isblank((int) *my_str)) {
my_str++;
}
if (*my_str == 'N') {
northern_hemisphere = true;
} else if (*my_str == 'S') {
northern_hemisphere = false;
} else {
return LDNS_STATUS_INVALID_STR;
}
my_str++;
/* store number */
s = 1000.0 * s;
/* add a little to make floor in conversion a round */
s += 0.0005;
latitude = (uint32_t) s;
latitude += 1000 * 60 * m;
latitude += 1000 * 60 * 60 * h;
if (northern_hemisphere) {
latitude = equator + latitude;
} else {
latitude = equator - latitude;
}
while (isblank((unsigned char)*my_str)) {
my_str++;
}
if (isdigit((int) *my_str)) {
h = (uint32_t) strtol(my_str, &my_str, 10);
} else {
return LDNS_STATUS_INVALID_STR;
}
while (isblank((int) *my_str)) {
my_str++;
}
if (isdigit((int) *my_str)) {
m = (uint32_t) strtol(my_str, &my_str, 10);
} else if (*my_str == 'E' || *my_str == 'W') {
goto east;
} else {
return LDNS_STATUS_INVALID_STR;
}
while (isblank((unsigned char)*my_str)) {
my_str++;
}
if (isdigit((int) *my_str)) {
s = strtod(my_str, &my_str);
}
east:
while (isblank((unsigned char)*my_str)) {
my_str++;
}
if (*my_str == 'E') {
eastern_hemisphere = true;
} else if (*my_str == 'W') {
eastern_hemisphere = false;
} else {
return LDNS_STATUS_INVALID_STR;
}
my_str++;
/* store number */
s *= 1000.0;
/* add a little to make floor in conversion a round */
s += 0.0005;
longitude = (uint32_t) s;
longitude += 1000 * 60 * m;
longitude += 1000 * 60 * 60 * h;
if (eastern_hemisphere) {
longitude += equator;
} else {
longitude = equator - longitude;
}
altitude = (uint32_t)(strtod(my_str, &my_str)*100.0 +
10000000.0 + 0.5);
if (*my_str == 'm' || *my_str == 'M') {
my_str++;
}
if (strlen(my_str) > 0) {
if(!loc_parse_cm(my_str, &my_str, &size_b, &size_e))
return LDNS_STATUS_INVALID_STR;
}
if (strlen(my_str) > 0) {
if(!loc_parse_cm(my_str, &my_str, &horiz_pre_b, &horiz_pre_e))
return LDNS_STATUS_INVALID_STR;
}
if (strlen(my_str) > 0) {
if(!loc_parse_cm(my_str, &my_str, &vert_pre_b, &vert_pre_e))
return LDNS_STATUS_INVALID_STR;
}
data = LDNS_XMALLOC(uint8_t, 16);
if(!data) {
return LDNS_STATUS_MEM_ERR;
}
data[0] = 0;
data[1] = 0;
data[1] = ((size_b << 4) & 0xf0) | (size_e & 0x0f);
data[2] = ((horiz_pre_b << 4) & 0xf0) | (horiz_pre_e & 0x0f);
data[3] = ((vert_pre_b << 4) & 0xf0) | (vert_pre_e & 0x0f);
ldns_write_uint32(data + 4, latitude);
ldns_write_uint32(data + 8, longitude);
ldns_write_uint32(data + 12, altitude);
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_LOC, 16, data);
LDNS_FREE(data);
return *rd?LDNS_STATUS_OK:LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_wks(ldns_rdf **rd, const char *str)
{
uint8_t *bitmap = NULL;
uint8_t *data;
int bm_len = 0;
struct protoent *proto = NULL;
struct servent *serv = NULL;
int serv_port;
ldns_buffer *str_buf;
char *proto_str = NULL;
char *lc_proto_str = NULL;
char *token;
char *lc_token;
char *c;
if(strlen(str) == 0)
token = LDNS_XMALLOC(char, 50);
else token = LDNS_XMALLOC(char, strlen(str)+2);
if(!token) return LDNS_STATUS_MEM_ERR;
str_buf = LDNS_MALLOC(ldns_buffer);
if(!str_buf) {LDNS_FREE(token); return LDNS_STATUS_MEM_ERR;}
ldns_buffer_new_frm_data(str_buf, (char *)str, strlen(str));
if(ldns_buffer_status(str_buf) != LDNS_STATUS_OK) {
LDNS_FREE(str_buf);
LDNS_FREE(token);
return LDNS_STATUS_MEM_ERR;
}
while(ldns_bget_token(str_buf, token, "\t\n ", strlen(str)) > 0) {
if (!proto_str) {
proto_str = strdup(token);
lc_proto_str = strdup(token);
for (c = lc_proto_str; *c; c++) {
*c = tolower((unsigned char)*c);
}
if (!proto_str || !lc_proto_str) {
free(proto_str);
free(lc_proto_str);
LDNS_FREE(bitmap);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
} else {
serv = getservbyname(token, proto_str);
if (!serv) {
serv = getservbyname(token, lc_proto_str);
}
if (!serv && (lc_token = strdup(token))) {
for (c = lc_token; *c; c++) {
*c = tolower((unsigned char)*c);
}
serv = getservbyname(lc_token, proto_str);
if (!serv) {
serv = getservbyname(lc_token, lc_proto_str);
}
free(lc_token);
}
if (serv) {
serv_port = (int) ntohs((uint16_t) serv->s_port);
} else {
serv_port = atoi(token);
}
if (serv_port < 0 || serv_port > 65535) {
LDNS_FREE(bitmap);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
free(proto_str);
free(lc_proto_str);
return LDNS_STATUS_INVALID_STR;
}
if (serv_port / 8 >= bm_len) {
uint8_t *b2 = LDNS_XREALLOC(bitmap, uint8_t, (serv_port / 8) + 1);
if(!b2) {
LDNS_FREE(bitmap);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
free(proto_str);
free(lc_proto_str);
return LDNS_STATUS_INVALID_STR;
}
bitmap = b2;
/* set to zero to be sure */
for (; bm_len <= serv_port / 8; bm_len++) {
bitmap[bm_len] = 0;
}
}
ldns_set_bit(bitmap + (serv_port / 8), 7 - (serv_port % 8), true);
}
}
if (!proto_str || !bitmap) {
LDNS_FREE(bitmap);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
free(proto_str);
free(lc_proto_str);
return LDNS_STATUS_INVALID_STR;
}
data = LDNS_XMALLOC(uint8_t, bm_len + 1);
if(!data) {
LDNS_FREE(token);
ldns_buffer_free(str_buf);
LDNS_FREE(bitmap);
free(proto_str);
free(lc_proto_str);
return LDNS_STATUS_INVALID_STR;
}
if (proto_str)
proto = getprotobyname(proto_str);
if (!proto) {
proto = getprotobyname(lc_proto_str);
}
if (proto) {
data[0] = (uint8_t) proto->p_proto;
} else if (proto_str) {
data[0] = (uint8_t) atoi(proto_str);
}
memcpy(data + 1, bitmap, (size_t) bm_len);
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_WKS, (uint16_t) (bm_len + 1), data);
LDNS_FREE(data);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
LDNS_FREE(bitmap);
free(proto_str);
free(lc_proto_str);
#ifdef HAVE_ENDSERVENT
endservent();
#endif
#ifdef HAVE_ENDPROTOENT
endprotoent();
#endif
if(!*rd) return LDNS_STATUS_MEM_ERR;
return LDNS_STATUS_OK;
}
ldns_status
ldns_str2rdf_nsap(ldns_rdf **rd, const char *str)
{
size_t len, i;
char* nsap_str = (char*) str;
/* just a hex string with optional dots? */
if (str[0] != '0' || str[1] != 'x') {
return LDNS_STATUS_INVALID_STR;
} else {
len = strlen(str);
for (i=0; i < len; i++) {
if (nsap_str[i] == '.')
nsap_str[i] = ' ';
}
return ldns_str2rdf_hex(rd, str+2);
}
}
ldns_status
ldns_str2rdf_atma(ldns_rdf **rd, const char *str)
{
size_t len, i;
char* atma_str = (char*) str;
ldns_status status;
/* just a hex string with optional dots? */
len = strlen(str);
for (i=0; i < len; i++) {
if (atma_str[i] == '.')
atma_str[i] = ' ';
}
status = ldns_str2rdf_hex(rd, str);
if (status != LDNS_STATUS_OK) {
; /* probably in e.164 format than */
}
return status;
}
ldns_status
ldns_str2rdf_ipseckey(ldns_rdf **rd, const char *str)
{
uint8_t precedence = 0;
uint8_t gateway_type = 0;
uint8_t algorithm = 0;
char* gateway = NULL;
char* publickey = NULL;
uint8_t *data;
ldns_buffer *str_buf;
char *token;
int token_count = 0;
int ipseckey_len = 0;
ldns_rdf* gateway_rdf = NULL;
ldns_rdf* publickey_rdf = NULL;
ldns_status status = LDNS_STATUS_OK;
if(strlen(str) == 0)
token = LDNS_XMALLOC(char, 256);
else token = LDNS_XMALLOC(char, strlen(str)+2);
if(!token) return LDNS_STATUS_MEM_ERR;
str_buf = LDNS_MALLOC(ldns_buffer);
if(!str_buf) {LDNS_FREE(token); return LDNS_STATUS_MEM_ERR;}
ldns_buffer_new_frm_data(str_buf, (char *)str, strlen(str));
if(ldns_buffer_status(str_buf) != LDNS_STATUS_OK) {
LDNS_FREE(str_buf);
LDNS_FREE(token);
return LDNS_STATUS_MEM_ERR;
}
while(ldns_bget_token(str_buf, token, "\t\n ", strlen(str)) > 0) {
switch (token_count) {
case 0:
precedence = (uint8_t)atoi(token);
break;
case 1:
gateway_type = (uint8_t)atoi(token);
break;
case 2:
algorithm = (uint8_t)atoi(token);
break;
case 3:
gateway = strdup(token);
if (!gateway || (gateway_type == 0 &&
(token[0] != '.' || token[1] != '\0'))) {
LDNS_FREE(gateway);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
break;
case 4:
publickey = strdup(token);
break;
default:
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
break;
}
token_count++;
}
if (!gateway || !publickey) {
if (gateway)
LDNS_FREE(gateway);
if (publickey)
LDNS_FREE(publickey);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
if (gateway_type == 1) {
status = ldns_str2rdf_a(&gateway_rdf, gateway);
} else if (gateway_type == 2) {
status = ldns_str2rdf_aaaa(&gateway_rdf, gateway);
} else if (gateway_type == 3) {
status = ldns_str2rdf_dname(&gateway_rdf, gateway);
} else if (gateway_type > 3) {
status = LDNS_STATUS_INVALID_STR;
}
if (status != LDNS_STATUS_OK) {
if (gateway)
LDNS_FREE(gateway);
if (publickey)
LDNS_FREE(publickey);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
status = ldns_str2rdf_b64(&publickey_rdf, publickey);
if (status != LDNS_STATUS_OK) {
if (gateway)
LDNS_FREE(gateway);
if (publickey)
LDNS_FREE(publickey);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
if (gateway_rdf) ldns_rdf_free(gateway_rdf);
return LDNS_STATUS_INVALID_STR;
}
/* now copy all into one ipseckey rdf */
if (gateway_type)
ipseckey_len = 3 + (int)ldns_rdf_size(gateway_rdf) + (int)ldns_rdf_size(publickey_rdf);
else
ipseckey_len = 3 + (int)ldns_rdf_size(publickey_rdf);
data = LDNS_XMALLOC(uint8_t, ipseckey_len);
if(!data) {
if (gateway)
LDNS_FREE(gateway);
if (publickey)
LDNS_FREE(publickey);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
if (gateway_rdf) ldns_rdf_free(gateway_rdf);
if (publickey_rdf) ldns_rdf_free(publickey_rdf);
return LDNS_STATUS_MEM_ERR;
}
data[0] = precedence;
data[1] = gateway_type;
data[2] = algorithm;
if (gateway_type) {
memcpy(data + 3,
ldns_rdf_data(gateway_rdf), ldns_rdf_size(gateway_rdf));
memcpy(data + 3 + ldns_rdf_size(gateway_rdf),
ldns_rdf_data(publickey_rdf), ldns_rdf_size(publickey_rdf));
} else {
memcpy(data + 3,
ldns_rdf_data(publickey_rdf), ldns_rdf_size(publickey_rdf));
}
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_IPSECKEY, (uint16_t) ipseckey_len, data);
if (gateway)
LDNS_FREE(gateway);
if (publickey)
LDNS_FREE(publickey);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
ldns_rdf_deep_free(gateway_rdf);
ldns_rdf_deep_free(publickey_rdf);
LDNS_FREE(data);
if(!*rd) return LDNS_STATUS_MEM_ERR;
return LDNS_STATUS_OK;
}
ldns_status
ldns_str2rdf_ilnp64(ldns_rdf **rd, const char *str)
{
unsigned int a, b, c, d;
uint16_t shorts[4];
int l;
if (sscanf(str, "%4x:%4x:%4x:%4x%n", &a, &b, &c, &d, &l) != 4 ||
l != (int)strlen(str) || /* more data to read */
strpbrk(str, "+-") /* signed hexes */
) {
return LDNS_STATUS_INVALID_ILNP64;
} else {
shorts[0] = htons(a);
shorts[1] = htons(b);
shorts[2] = htons(c);
shorts[3] = htons(d);
*rd = ldns_rdf_new_frm_data(
LDNS_RDF_TYPE_ILNP64, 4 * sizeof(uint16_t), &shorts);
}
return *rd ? LDNS_STATUS_OK : LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_eui48(ldns_rdf **rd, const char *str)
{
unsigned int a, b, c, d, e, f;
uint8_t bytes[6];
int l;
if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x%n",
&a, &b, &c, &d, &e, &f, &l) != 6 ||
l != (int)strlen(str)) {
return LDNS_STATUS_INVALID_EUI48;
} else {
bytes[0] = a;
bytes[1] = b;
bytes[2] = c;
bytes[3] = d;
bytes[4] = e;
bytes[5] = f;
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_EUI48, 6, &bytes);
}
return *rd ? LDNS_STATUS_OK : LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_eui64(ldns_rdf **rd, const char *str)
{
unsigned int a, b, c, d, e, f, g, h;
uint8_t bytes[8];
int l;
if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x-%2x-%2x%n",
&a, &b, &c, &d, &e, &f, &g, &h, &l) != 8 ||
l != (int)strlen(str)) {
return LDNS_STATUS_INVALID_EUI64;
} else {
bytes[0] = a;
bytes[1] = b;
bytes[2] = c;
bytes[3] = d;
bytes[4] = e;
bytes[5] = f;
bytes[6] = g;
bytes[7] = h;
*rd = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_EUI64, 8, &bytes);
}
return *rd ? LDNS_STATUS_OK : LDNS_STATUS_MEM_ERR;
}
ldns_status
ldns_str2rdf_tag(ldns_rdf **rd, const char *str)
{
uint8_t *data;
const char* ptr;
if (strlen(str) > 255) {
return LDNS_STATUS_INVALID_TAG;
}
for (ptr = str; *ptr; ptr++) {
if (! isalnum((unsigned char)*ptr)) {
return LDNS_STATUS_INVALID_TAG;
}
}
data = LDNS_XMALLOC(uint8_t, strlen(str) + 1);
if (!data) {
return LDNS_STATUS_MEM_ERR;
}
data[0] = strlen(str);
memcpy(data + 1, str, strlen(str));
*rd = ldns_rdf_new(LDNS_RDF_TYPE_TAG, strlen(str) + 1, data);
if (!*rd) {
LDNS_FREE(data);
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
ldns_status
ldns_str2rdf_long_str(ldns_rdf **rd, const char *str)
{
uint8_t *data, *dp, ch = 0;
size_t length;
/* Worst case space requirement. We'll realloc to actual size later. */
dp = data = LDNS_XMALLOC(uint8_t, strlen(str));
if (! data) {
return LDNS_STATUS_MEM_ERR;
}
/* Fill data with parsed bytes */
while (parse_char(&ch, &str)) {
*dp++ = ch;
if (dp - data > LDNS_MAX_RDFLEN) {
LDNS_FREE(data);
return LDNS_STATUS_INVALID_STR;
}
}
if (! str) {
LDNS_FREE(data);
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
}
if (!(length = (size_t)(dp - data))) {
/* An empty string is a data buffer of 0 bytes. The rdf for
* this long string has to have length 0 and point to NULL.
*/
LDNS_FREE(data);
data = NULL;
} else {
/* Lose the overmeasure */
data = LDNS_XREALLOC(dp = data, uint8_t, length);
if (! data) {
LDNS_FREE(dp);
return LDNS_STATUS_MEM_ERR;
}
}
/* Create rdf */
*rd = ldns_rdf_new(LDNS_RDF_TYPE_LONG_STR, length, data);
if (! *rd) {
LDNS_FREE(data);
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
ldns_status
ldns_str2rdf_hip(ldns_rdf **rd, const char *str)
{
const char *hit = str == NULL ? NULL : strchr(str, ' ');
const char *pk = hit == NULL ? NULL : strchr(hit + 1, ' ');
size_t hit_size = hit == NULL ? 0
: pk == NULL ? strlen(hit + 1) : (size_t) (pk - hit) - 1;
size_t pk_size = pk == NULL ? 0 : strlen(pk + 1);
size_t hit_wire_size = (hit_size + 1) / 2;
size_t pk_wire_size = ldns_b64_pton_calculate_size(pk_size);
size_t rdf_size = 4 + hit_wire_size + pk_wire_size;
char *endptr; /* utility var for strtol usage */
int algorithm = str == NULL ? 0 : strtol(str, &endptr, 10);
uint8_t *data, *dp;
int hi, lo, written;
if (hit_size == 0 || pk_size == 0 || (hit_size + 1) / 2 > 255
|| rdf_size > LDNS_MAX_RDFLEN
|| algorithm < 0 || algorithm > 255
|| (errno != 0 && algorithm == 0) /* out of range */
|| endptr == str /* no digits */) {
return LDNS_STATUS_SYNTAX_ERR;
}
hit += 1;
pk += 1;
if ((data = LDNS_XMALLOC(uint8_t, rdf_size)) == NULL) {
return LDNS_STATUS_MEM_ERR;
}
/* From RFC 5205 section 5. HIP RR Storage Format:
*************************************************
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| HIT length | PK algorithm | PK length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ HIT ~
| |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+ +
| Public Key |
~ ~
| |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
| |
~ Rendezvous Servers ~
| |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+-+-+-+-+-+-+-+ */
data[0] = (uint8_t) hit_wire_size;
data[1] = (uint8_t) algorithm;
for (dp = data + 4; *hit && *hit != ' '; dp++) {
if ((hi = ldns_hexdigit_to_int(*hit++)) == -1 ||
(lo = ldns_hexdigit_to_int(*hit++)) == -1) {
LDNS_FREE(data);
return LDNS_STATUS_INVALID_HEX;
}
*dp = (uint8_t) hi << 4 | lo;
}
if ((written = ldns_b64_pton(pk, dp, pk_wire_size)) <= 0) {
LDNS_FREE(data);
return LDNS_STATUS_INVALID_B64;
}
/* Because ldns_b64_pton_calculate_size isn't always correct:
* (we have to fix it at some point)
*/
pk_wire_size = (uint16_t) written;
ldns_write_uint16(data + 2, pk_wire_size);
rdf_size = 4 + hit_wire_size + pk_wire_size;
/* Create rdf */
if (! (*rd = ldns_rdf_new(LDNS_RDF_TYPE_HIP, rdf_size, data))) {
LDNS_FREE(data);
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
/* Implementation mimics ldns_str2rdf_ipseckey */
ldns_status
ldns_str2rdf_amtrelay(ldns_rdf **rd, const char *str)
{
/* From draft-ietf-mboned-driad-amt-discovery
* Section 4.2. AMTRELAY RData Format
*************************************************
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| precedence |D| type | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
~ relay ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */
uint8_t precedence = 0;
uint8_t relay_type = 0;
uint8_t discovery_optional = 0;
char* relay = NULL;
uint8_t *data;
ldns_buffer *str_buf;
char *token;
int token_count = 0;
int amtrelay_len = 0;
ldns_rdf* relay_rdf = NULL;
ldns_status status = LDNS_STATUS_OK;
if(strlen(str) == 0)
token = LDNS_XMALLOC(char, 256);
else token = LDNS_XMALLOC(char, strlen(str)+2);
if(!token) return LDNS_STATUS_MEM_ERR;
str_buf = LDNS_MALLOC(ldns_buffer);
if(!str_buf) {LDNS_FREE(token); return LDNS_STATUS_MEM_ERR;}
ldns_buffer_new_frm_data(str_buf, (char *)str, strlen(str));
if(ldns_buffer_status(str_buf) != LDNS_STATUS_OK) {
LDNS_FREE(str_buf);
LDNS_FREE(token);
return LDNS_STATUS_MEM_ERR;
}
while(ldns_bget_token(str_buf, token, "\t\n ", strlen(str)) > 0) {
switch (token_count) {
case 0:
precedence = (uint8_t)atoi(token);
break;
case 1:
discovery_optional = (uint8_t)atoi(token);
if (discovery_optional != 0 &&
discovery_optional != 1) {
LDNS_FREE(relay);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
break;
case 2:
relay_type = (uint8_t)atoi(token);
break;
case 3:
relay = strdup(token);
if (!relay || (relay_type == 0 &&
(token[0] != '.' || token[1] != '\0'))) {
LDNS_FREE(relay);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
break;
default:
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
break;
}
token_count++;
}
if (!relay && relay_type > 0) {
if (relay)
LDNS_FREE(relay);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
if (relay_type == 1) {
status = ldns_str2rdf_a(&relay_rdf, relay);
} else if (relay_type == 2) {
status = ldns_str2rdf_aaaa(&relay_rdf, relay);
} else if (relay_type == 3) {
status = ldns_str2rdf_dname(&relay_rdf, relay);
} else if (relay_type > 3) {
status = LDNS_STATUS_INVALID_STR;
}
if (status != LDNS_STATUS_OK) {
if (relay)
LDNS_FREE(relay);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
return LDNS_STATUS_INVALID_STR;
}
/* now copy all into one amtrelay rdf */
if (relay_type)
amtrelay_len = 2 + (int)ldns_rdf_size(relay_rdf);
else
amtrelay_len = 2;
data = LDNS_XMALLOC(uint8_t, amtrelay_len);
if(!data) {
if (relay)
LDNS_FREE(relay);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
if (relay_rdf) ldns_rdf_free(relay_rdf);
return LDNS_STATUS_MEM_ERR;
}
data[0] = precedence;
data[1] = relay_type;
data[1] |= (discovery_optional << 7);
if (relay_type) {
memcpy(data + 2,
ldns_rdf_data(relay_rdf), ldns_rdf_size(relay_rdf));
}
*rd = ldns_rdf_new_frm_data( LDNS_RDF_TYPE_AMTRELAY
, (uint16_t) amtrelay_len, data);
if (relay)
LDNS_FREE(relay);
LDNS_FREE(token);
ldns_buffer_free(str_buf);
ldns_rdf_free(relay_rdf);
LDNS_FREE(data);
if(!*rd) return LDNS_STATUS_MEM_ERR;
return LDNS_STATUS_OK;
}
#ifdef RRTYPE_SVCB_HTTPS
static int
network_uint16_cmp(const void *a, const void *b)
{
return ((int)ldns_read_uint16(a)) - ((int)ldns_read_uint16(b));
}
static ldns_status parse_svcparam_key(const char **s, ldns_svcparam_key *key);
static ldns_status
parse_svcparam_mandatory(const char **s, uint8_t **dp, uint8_t *eod)
{
bool quoted = false;
uint8_t *keys = *dp;
int prev_key;
if (**s == '"') {
*s += 1;
quoted = true;
}
for (;;) {
ldns_status st;
ldns_svcparam_key key;
if ((st = parse_svcparam_key(s, &key)))
return st;
if (*dp + 2 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
ldns_write_uint16(*dp, key);
*dp += 2;
if (**s == ',')
*s += 1;
else
break;
}
if (quoted) {
if (**s != '"')
return LDNS_STATUS_INVALID_STR;
*s += 1;
}
if (*dp - keys == 0)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
if (**s && !isspace((unsigned char)**s))
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
/* In draft-ietf-dnsop-svcb-https-02 Section 7:
*
* In wire format, the keys are represented by their numeric
* values in network byte order, concatenated in ascending order.
*/
qsort(keys, (*dp - keys) / 2, 2, network_uint16_cmp);
/* In draft-ietf-dnsop-svcb-https-02 Section 7:
*
* Keys ...<snip>... MUST NOT appear more than once.
*/
prev_key = -1;
while (keys < *dp) {
uint16_t key = ldns_read_uint16(keys);
if (key == prev_key) {
/* "Be conservative in what you send,
* be liberal in what you accept"
*
* Instead of
* `return LDNS_STATUS_SVCPARAM_KEY_MORE_THAN_ONCE;`,
*
* we eliminate the double occurrence.
*/
memmove(keys - 2, keys, *dp - keys);
*dp -= 2;
} else {
prev_key = key;
keys += 2;
}
}
return LDNS_STATUS_OK;
}
INLINE bool parse_escape2(uint8_t *ch_p, const char** str_p)
{ *str_p += 1; return parse_escape(ch_p, str_p); }
static ldns_status
parse_svcparam_alpn(const char **s, uint8_t **dp, uint8_t *eod)
{
uint8_t *val;
size_t len;
if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
*dp += 1;
val = *dp;
if (**s == '"') {
*s += 1;
while (**s != '"') {
if (**s == 0)
return LDNS_STATUS_INVALID_STR;
else if (**s == ',') {
len = *dp - val;
if (len == 0 || len > 255)
return LDNS_STATUS_INVALID_STR;
val[-1] = len;
if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
*dp += 1;
val = *dp;
*s += 1;
} else if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
else if (**s != '\\')
*(*dp)++ = (uint8_t)*(*s)++;
else if (!parse_escape2(*dp, s))
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
else
*dp += 1;
}
*s += 1;
} else while (**s && !isspace((unsigned char)**s)) {
if (**s == ',') {
len = *dp - val;
if (len == 0 || len > 255)
return LDNS_STATUS_INVALID_STR;
val[-1] = len;
if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
*dp += 1;
val = *dp;
*s += 1;
} else if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
else if (**s != '\\')
*(*dp)++ = (uint8_t)*(*s)++;
else if (!parse_escape2(*dp, s))
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
else
*dp += 1;
}
len = *dp - val;
if (len == 0 || len > 255)
return LDNS_STATUS_INVALID_STR;
val[-1] = len;
return **s && !isspace((unsigned char)**s)
? LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR
: LDNS_STATUS_OK;
}
static ldns_status
parse_svcparam_value(const char **s, uint8_t **dp, uint8_t *eod)
{
if (**s == '"') {
*s += 1;
while (**s != '"') {
if (**s == 0)
return LDNS_STATUS_INVALID_STR;
else if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
else if (**s != '\\')
*(*dp)++ = (uint8_t)*(*s)++;
else if (!parse_escape2(*dp, s))
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
else
*dp += 1;
}
*s += 1;
} else while (**s && !isspace((unsigned char)**s)) {
if (*dp + 1 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
else if (**s != '\\')
*(*dp)++ = (uint8_t)*(*s)++;
else if (!parse_escape2(*dp, s))
return LDNS_STATUS_SYNTAX_BAD_ESCAPE;
else
*dp += 1;
}
return **s && !isspace((unsigned char)**s)
? LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR
: LDNS_STATUS_OK;
}
static ldns_status
parse_svcparam_port(const char **s, uint8_t **dp, uint8_t *eod)
{
uint8_t *val = *dp;
ldns_status st;
size_t len;
char num_str[6];
char *endptr;
unsigned long int num;
if ((st = parse_svcparam_value(s, dp, eod)))
return st;
len = *dp - val;
if (len == 0 || len > 5)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
memcpy(num_str, val, len);
num_str[len] = 0;
num = strtoul(num_str, &endptr, 10);
if (*endptr)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
ldns_write_uint16(val, num);
*dp = val + 2;
return LDNS_STATUS_OK;
}
static ldns_status
parse_svcparam_ipv4hint(const char **s, uint8_t **dp, uint8_t *eod)
{
bool quoted = false;
if (**s == '"') {
*s += 1;
quoted = true;
}
for (;;) {
const char *ipv4_start = *s;
char ipv4_str[16];
size_t len;
while (isdigit((unsigned char)**s) || **s == '.')
*s += 1;
len = *s - ipv4_start;
if (len == 0 || len > 15)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
if (*dp + 4 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
memcpy(ipv4_str, ipv4_start, len);
ipv4_str[len] = 0;
if (inet_pton(AF_INET, ipv4_str, *dp) != 1)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
*dp += 4;
if (**s == ',')
*s += 1;
else
break;
}
if (quoted) {
if (**s != '"')
return LDNS_STATUS_INVALID_STR;
*s += 1;
}
return **s && !isspace((unsigned char)**s)
? LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR
: LDNS_STATUS_OK;
}
static ldns_status
parse_svcparam_ech(const char **s, uint8_t **dp, uint8_t *eod)
{
bool quoted = false;
const char *b64_str;
size_t len, pad, out_len;
char in_buf[4096];
char *in = in_buf;
int out;
if (**s == '"') {
*s += 1;
quoted = true;
}
b64_str = *s;
while (isalnum((unsigned char)**s) || **s == '+'
|| **s == '/'
|| **s == '=')
*s += 1;
len = *s - b64_str;
pad = len % 4;
pad = pad ? 4 - pad : 0;
if (len == 0 || pad == 3)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
if (quoted) {
if (**s != '"')
return LDNS_STATUS_INVALID_STR;
*s += 1;
}
if (**s && !isspace((unsigned char)**s))
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
out_len = ldns_b64_pton_calculate_size(len);
if (*dp + out_len > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
if (len + pad > sizeof(in_buf) - 1
&& !(in = LDNS_XMALLOC(char, len + pad + 1)))
return LDNS_STATUS_MEM_ERR;
memcpy(in, b64_str, len);
while (pad--)
in[len++] = '=';
in[len] = 0;
out = ldns_b64_pton(in, *dp, out_len);
if (in != in_buf)
LDNS_FREE(in);
if (out <= 0)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
*dp += out;
return LDNS_STATUS_OK;
}
static ldns_status
parse_svcparam_ipv6hint(const char **s, uint8_t **dp, uint8_t *eod)
{
bool quoted = false;
if (**s == '"') {
*s += 1;
quoted = true;
}
for (;;) {
const char *ipv6_start = *s;
char ipv6_str[INET6_ADDRSTRLEN];
size_t len;
while (isxdigit((unsigned char)**s) || **s == ':' || **s == '.')
*s += 1;
len = *s - ipv6_start;
if (len == 0 || len > INET6_ADDRSTRLEN)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
if (*dp + 16 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
memcpy(ipv6_str, ipv6_start, len);
ipv6_str[len] = 0;
if (inet_pton(AF_INET6, ipv6_str, *dp) != 1)
return LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR;
*dp += 16;
if (**s == ',')
*s += 1;
else
break;
}
if (quoted) {
if (**s != '"')
return LDNS_STATUS_INVALID_STR;
*s += 1;
}
return **s && !isspace((unsigned char)**s)
? LDNS_STATUS_SYNTAX_SVCPARAM_VALUE_ERR
: LDNS_STATUS_OK;
}
struct struct_svcparam_key_def {
const char *str;
size_t len;
};
typedef struct struct_svcparam_key_def svcparam_key_def;
static svcparam_key_def svcparam_key_defs[] = { { "mandatory" , 9 }
, { "alpn" , 4 }
, { "no-default-alpn", 15 }
, { "port" , 4 }
, { "ipv4hint" , 8 }
, { "ech" , 3 }
, { "ipv6hint" , 8 }
, { "dohpath" , 7 } };
static const size_t svcparam_key_defs_len = sizeof(svcparam_key_defs)
/ sizeof(svcparam_key_def);
/* svcparam_key2buffer_str() should actually be in host2str.c, but we need the
* svcparam_key_defs for it and it is not an exposed symbol anyway.
*/
ldns_status svcparam_key2buffer_str(ldns_buffer *output, uint16_t key)
{
if (key <= LDNS_SVCPARAM_KEY_LAST_KEY)
ldns_buffer_write_string(output, svcparam_key_defs[key].str);
else
ldns_buffer_printf(output, "key%d", (int)key);
return ldns_buffer_status(output);
}
static ldns_status
parse_svcparam_key(const char **s, ldns_svcparam_key *key)
{
size_t i, len;
const char *key_str = *s;
char num_str[6];
char *endptr;
unsigned long int num;
/* parse key */
while (islower((unsigned char)**s) || isdigit((unsigned char)**s)
|| **s == '-')
*s += 1;
len = *s - key_str;
for (i = 0; i < svcparam_key_defs_len; i++) {
if (len == svcparam_key_defs[i].len
&& !strncmp(key_str, svcparam_key_defs[i].str, len)) {
*key = i;
return LDNS_STATUS_OK;
}
}
/* Also allow "echconfig" from earlier draft versions. */
if (len == 9 && !strncmp(key_str, "echconfig", 9)) {
*key = LDNS_SVCPARAM_KEY_ECH;
return LDNS_STATUS_OK;
}
if (len < 4 || len > 8 || strncmp(key_str, "key", 3))
return LDNS_STATUS_SYNTAX_SVCPARAM_KEY_ERR;
memcpy(num_str, key_str + 3, len - 3);
num_str[len - 3] = 0;
num = strtoul(num_str, &endptr, 10);
if (*endptr || num > 65535)
return LDNS_STATUS_SYNTAX_SVCPARAM_KEY_ERR;
/* key65535 is Reserved to be an ("Invalid key"), though there is no
* physiological reason to deny usage. We restrict ourselves to the
* anatomical limitations only to maximize serviceability.
* ```
* if (num == 65535)
* return LDNS_STATUS_RESERVED_SVCPARAM_KEY;
* ```
*/
*key = num;
return LDNS_STATUS_OK;
}
static ldns_status
parse_svcparam(const char **s, uint8_t **dp, uint8_t *eod)
{
ldns_svcparam_key key;
ldns_status st;
uint8_t *val;
if (*dp + 4 > eod)
return LDNS_STATUS_RDATA_OVERFLOW;
if ((st = parse_svcparam_key(s, &key)))
return st;
ldns_write_uint16(*dp, key);
ldns_write_uint16(*dp + 2, 0);
*dp += 4;
if (isspace((unsigned char)**s) || !**s)
return LDNS_STATUS_OK;
else if (**s != '=')
return LDNS_STATUS_SYNTAX_ERR;
*s += 1;
val = *dp;
switch(key) {
case LDNS_SVCPARAM_KEY_MANDATORY:
st = parse_svcparam_mandatory(s, dp, eod);
break;
case LDNS_SVCPARAM_KEY_ALPN:
st = parse_svcparam_alpn(s, dp, eod);
break;
case LDNS_SVCPARAM_KEY_NO_DEFAULT_ALPN:
return LDNS_STATUS_NO_SVCPARAM_VALUE_EXPECTED;
case LDNS_SVCPARAM_KEY_PORT:
st = parse_svcparam_port(s, dp, eod);
break;
case LDNS_SVCPARAM_KEY_IPV4HINT:
st = parse_svcparam_ipv4hint(s, dp, eod);
break;
case LDNS_SVCPARAM_KEY_ECH:
st = parse_svcparam_ech(s, dp, eod);
break;
case LDNS_SVCPARAM_KEY_IPV6HINT:
st = parse_svcparam_ipv6hint(s, dp, eod);
break;
default:
st = parse_svcparam_value(s, dp, eod);
break;
}
if (st)
return st;
ldns_write_uint16(val - 2, *dp - val);
return LDNS_STATUS_OK;
}
static int
svcparam_ptr_cmp(const void *a, const void *b)
{
uint8_t *x = *(uint8_t **)a , *y = *(uint8_t **)b;
uint16_t x_type = ldns_read_uint16(x), y_type = ldns_read_uint16(y);
uint16_t x_len , y_len;
if (x_type != y_type)
return x_type > y_type ? 1 : -1;
x_len = ldns_read_uint16(x + 2);
y_len = ldns_read_uint16(y + 2);
return x_len != y_len
? (x_len > y_len ? 1 : -1)
: (x_len == 0 ? 0 : memcmp(x + 4, y + 4, x_len));
}
ldns_status
ldns_str2rdf_svcparams(ldns_rdf **rd, const char *str)
{
uint8_t *data, *dp, *eod, *p, *new_data;
ldns_status st = LDNS_STATUS_OK;
size_t length, i;
size_t nparams = 0;
uint8_t **svcparams;
int prev_key;
if (!rd || !str)
return LDNS_STATUS_NULL;
length = strlen(str);
/* Worst case space requirement. We'll realloc to actual size later. */
if (!(dp = data = LDNS_XMALLOC(uint8_t, length * 4)))
return LDNS_STATUS_MEM_ERR;
eod = data + length * 4;
/* Fill data with parsed bytes */
for (;;) {
while (isspace((unsigned char)*str))
str += 1;
if(!*str)
break;
if ((st = parse_svcparam(&str, &dp, eod))) {
LDNS_FREE(data);
return st;
}
nparams += 1;
}
/* draft-ietf-dnsop-svcb-https-02 in Section 2.2:
*
* SvcParamKeys SHALL appear in increasing numeric order
*
* A svcparams array (with pointers to the individual key, value pairs)
* is created to qsort the pairs in increasing numeric order.
*/
if (!(svcparams = LDNS_XMALLOC(uint8_t *, nparams))) {
LDNS_FREE(data);
return LDNS_STATUS_MEM_ERR;
}
for ( p = data, i = 0
; p < dp && i < nparams
; p += 4 + ldns_read_uint16(p + 2))
svcparams[i++] = p;
qsort(svcparams, i, sizeof(uint8_t *), svcparam_ptr_cmp);
/* Write out the (key, value) pairs to a newly allocated data in
* sorted order.
*/
length = dp - data;
if (!(new_data = LDNS_XMALLOC(uint8_t, length))) {
LDNS_FREE(data);
LDNS_FREE(svcparams);
return LDNS_STATUS_MEM_ERR;
}
prev_key = -1;
for ( p = new_data, i = 0
; p < new_data + length && i < nparams
; p += 4 + ldns_read_uint16(p + 2), i += 1) {
uint16_t key = ldns_read_uint16(svcparams[i]);
/* In draft-ietf-dnsop-svcb-https-02 Section 2.1:
*
* SvcParams ...<snip>... keys MUST NOT be repeated.
*
* ldns will not impose this limitation on the library user,
* but we can merge completely equal repetitions into one.
* So, not doing
* ```
* if (key == prev_key)
* return LDNS_STATUS_SVCPARAM_KEY_MORE_THAN_ONCE;
* ```
* but instead:
*/
if (key == prev_key && ldns_read_uint16(svcparams[i] + 2)
== ldns_read_uint16(svcparams[i - 1] + 2)
&& 0 == memcmp( svcparams[i ] + 4
, svcparams[i - 1] + 4
, ldns_read_uint16(svcparams[i] + 2))) {
p -= 4 + ldns_read_uint16(svcparams[i] + 2);
continue;
}
memcpy(p, svcparams[i], 4 + ldns_read_uint16(svcparams[i] + 2));
prev_key = key;
}
LDNS_FREE(data);
LDNS_FREE(svcparams);
/* Create rdf */
*rd = ldns_rdf_new(LDNS_RDF_TYPE_SVCPARAMS, p - new_data, new_data);
if (! *rd) {
LDNS_FREE(new_data);
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
#else /* #ifdef RRTYPE_SVCB_HTTPS */
ldns_status
ldns_str2rdf_svcparams(ldns_rdf **rd, const char *str)
{
(void)rd; (void)str;
return LDNS_STATUS_NOT_IMPL;
}
#endif /* #ifdef RRTYPE_SVCB_HTTPS */
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