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/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include <tap/basic.h>
#include "libknot/cookies.h"
#include "libknot/endian.h"
#include "libknot/errcode.h"
#include "contrib/sockaddr.h"
static void client_generate(struct sockaddr_storage *c_addr, struct sockaddr_storage *s_addr,
const uint8_t *secret, const char *msg, int code, uint64_t le_cc)
{
knot_edns_cookie_params_t params = {
.client_addr = (struct sockaddr *)c_addr,
.server_addr = (struct sockaddr *)s_addr,
};
memcpy(params.secret, secret, sizeof(params.secret));
knot_edns_cookie_t cc;
int ret = knot_edns_cookie_client_generate(&cc, ¶ms);
is_int(ret, code, "client_generate ret: %s", msg);
if (ret == KNOT_EOK) {
uint64_t ref = le64toh(le_cc);
ok(cc.len == sizeof(ref) && memcmp(cc.data, &ref, cc.len) == 0,
"client_generate value: %s", msg);
}
}
static void server_generate(struct sockaddr_storage *c_addr, const uint8_t *secret,
const knot_edns_cookie_t *cc, const char *msg, int code,
uint64_t le_sc)
{
knot_edns_cookie_params_t params = {
.client_addr = (struct sockaddr *)c_addr,
};
memcpy(params.secret, secret, sizeof(params.secret));
knot_edns_cookie_t sc;
int ret = knot_edns_cookie_server_generate(&sc, cc, ¶ms);
is_int(ret, code, "server_generate ret: %s", msg);
if (ret == KNOT_EOK) {
uint64_t ref = le64toh(le_sc);
ok(sc.len == sizeof(ref) && memcmp(sc.data, &ref, sc.len) == 0,
"server_generate value: %s", msg);
}
}
static void client_check(struct sockaddr_storage *c_addr, struct sockaddr_storage *s_addr,
const uint8_t *secret, const char *msg, uint16_t le_cc_len,
uint64_t le_cc, int code)
{
knot_edns_cookie_params_t params = {
.client_addr = (struct sockaddr *)c_addr,
.server_addr = (struct sockaddr *)s_addr,
};
if (secret != NULL) {
memcpy(params.secret, secret, sizeof(params.secret));
}
uint64_t ref = le64toh(le_cc);
knot_edns_cookie_t cc = {
.len = le_cc_len
};
memcpy(cc.data, &ref, le_cc_len);
int ret = knot_edns_cookie_client_check(&cc, ¶ms);
is_int(ret, code, "client_check ret: %s", msg);
}
static void server_check(struct sockaddr_storage *c_addr, const uint8_t *secret,
const char *msg, uint16_t le_cc_len, uint64_t le_cc,
uint16_t le_sc_len, uint64_t le_sc, int code)
{
knot_edns_cookie_params_t params = {
.client_addr = (struct sockaddr *)c_addr,
};
if (secret != NULL) {
memcpy(params.secret, secret, sizeof(params.secret));
}
uint64_t ref = le64toh(le_cc);
knot_edns_cookie_t cc = {
.len = le_cc_len
};
memcpy(cc.data, &ref, le_cc_len);
ref = le64toh(le_sc);
knot_edns_cookie_t sc = {
.len = le_sc_len
};
memcpy(sc.data, &ref, le_sc_len);
int ret = knot_edns_cookie_server_check(&sc, &cc, ¶ms);
is_int(ret, code, "server_check ret: %s", msg);
}
int main(int argc, char *argv[])
{
plan_lazy();
const uint8_t secret[] = "\xCE\xFA\xEF\xBE\xAD\xDE\x00\x00\xEF\xBE\xAD\xDE\xCE\xFA\x00\x00";
struct sockaddr_storage unspec_sa = { 0 };
struct sockaddr_storage c4_sa = { 0 };
struct sockaddr_storage s4_sa = { 0 };
sockaddr_set(&c4_sa, AF_INET, "127.0.0.1", 0);
sockaddr_set(&s4_sa, AF_INET, "10.0.0.1", 0);
struct sockaddr_storage c6_sa = { 0 };
struct sockaddr_storage s6_sa = { 0 };
sockaddr_set(&c6_sa, AF_INET6, "2001:db8:8714:3a90::12", 0);
sockaddr_set(&s6_sa, AF_INET6, "::1", 0);
/* Client cookie generate. */
client_generate(NULL, &s4_sa, secret, "NULL, IPv4", KNOT_EINVAL, 0);
client_generate(&c4_sa, NULL, secret, "IPv4, NULL", KNOT_EINVAL, 0);
client_generate(&c4_sa, &s4_sa, secret, "IPv4, IPv4", KNOT_EOK, 0xde3832f4f59bf5ab);
client_generate(&unspec_sa, &s4_sa, secret, "unspec, IPv4", KNOT_EOK, 0x6b636ff225a1b340);
client_generate(&c4_sa, &unspec_sa, secret, "IPv4, unspec", KNOT_EOK, 0xd713ab1a81179bb3);
/* Client cookie check. */
client_check(NULL, &s6_sa, secret, "no client addr", 8, 0xf99dbd02b69ab3c2, KNOT_EINVAL);
client_check(&c6_sa, NULL, secret, "no server addr", 8, 0xf99dbd02b69ab3c2, KNOT_EINVAL);
client_check(&c6_sa, &s6_sa, NULL, "no secret", 8, 0xf99dbd02b69ab3c2, KNOT_EINVAL);
client_check(&c6_sa, &s6_sa, secret, "no cookie", 0, 0, KNOT_EINVAL);
client_check(&c6_sa, &s6_sa, secret, "bad cookie length", 7, 0xf99dbd02b69ab3c2, KNOT_EINVAL);
client_check(&c6_sa, &s6_sa, secret, "invalid cookie", 8, 0, KNOT_EINVAL);
client_check(&c6_sa, &s6_sa, secret, "good cookie", 8, 0xf99dbd02b69ab3c2, KNOT_EOK);
const knot_edns_cookie_t cc = {
.data = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 },
.len = 8
};
/* Server cookie generate. */
knot_edns_cookie_t cc_part = cc; cc_part.len--;
server_generate(NULL, secret, &cc, "NULL", KNOT_EINVAL, 0);
server_generate(&c4_sa, secret, &cc_part, "cookie part", KNOT_EINVAL, 0);
server_generate(&c4_sa, secret, &cc, "IPv4", KNOT_EOK, 0x52f86bfcc98ded6);
server_generate(&c6_sa, secret, &cc, "IPv6", KNOT_EOK, 0x33ac6c9005acf469);
server_generate(&unspec_sa, secret, &cc, "unspec", KNOT_EOK, 0x96df9dbf28f0f59e);
/* Server cookie check. */
server_check(NULL, secret, "no addr", 8, 0x0706050403020100,
8, 0x33ac6c9005acf469, KNOT_EINVAL);
server_check(&c6_sa, NULL, "no secret", 8, 0x0706050403020100,
8, 0x33ac6c9005acf469, KNOT_EINVAL);
server_check(&c6_sa, secret, "no client cookie", 0, 0,
8, 0x33ac6c9005acf469, KNOT_EINVAL);
server_check(&c6_sa, secret, "no server cookie", 8, 0x0706050403020100,
0, 0, KNOT_EINVAL);
server_check(&c6_sa, secret, "bad client cookie", 8, 0,
8, 0x33ac6c9005acf469, KNOT_EINVAL);
server_check(&c6_sa, secret, "bad server cookie", 8, 0x0706050403020100,
8, 0, KNOT_EINVAL);
server_check(&c6_sa, secret, "good cookie 1", 8, 0x0706050403020100,
8, 0x33ac6c9005acf469, KNOT_EOK);
return 0;
}
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