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/* SPDX-License-Identifier: MPL-2.0 */
#ifdef ZMQ_USE_FUZZING_ENGINE
#include <fuzzer/FuzzedDataProvider.h>
#endif
#include <string.h>
#include "testutil.hpp"
#include "testutil_security.hpp"
// Test that the ZMTP engine handles invalid handshake when binding
// https://rfc.zeromq.org/spec/37/
extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
{
const char *fixed_client_public =
"{{k*81)yMWEF{/BxdMd[5RL^qRFxBgoL<8m.D^KD";
const char *fixed_client_secret =
"N?Gmik8R[2ACw{b7*[-$S6[4}aO#?DB?#=<OQPc7";
const char *fixed_server_public =
"3.9-xXwy{g*w72TP*3iB9IJJRxlBH<ufTAvPd2>C";
const char *fixed_server_secret =
"T}t5GLq%&Qm1)y3ywu-}pY3KEA//{^Ut!M1ut+B4";
void *handler;
void *zap_thread;
void *server;
void *server_mon;
char my_endpoint[MAX_SOCKET_STRING];
setup_test_context ();
memcpy (valid_client_public, fixed_client_public, 41);
setup_context_and_server_side (
&handler, &zap_thread, &server, &server_mon, my_endpoint, &zap_handler,
&socket_config_curve_server, (void *) fixed_server_secret);
fd_t client = connect_socket (my_endpoint);
// If there is not enough data for a full greeting, just send what we can
// Otherwise send greeting first, as expected by the protocol
uint8_t buf[512];
if (size >= 64) {
send (client, (void *) data, 64, MSG_NOSIGNAL);
data += 64;
size -= 64;
}
recv (client, buf, 64, 0);
// Then send HELLO and expect WELCOME if there's enough data
if (size >= 202) {
send (client, (void *) data, 202, MSG_NOSIGNAL);
data += 202;
size -= 202;
recv (client, buf, 170, MSG_DONTWAIT);
}
// Then send READY and expect INITIATE if there's enough data
if (size >= 301) {
send (client, (void *) data, 301, MSG_NOSIGNAL);
data += 301;
size -= 301;
recv (client, buf, 512, MSG_DONTWAIT);
}
msleep (250);
for (ssize_t sent = 0; size > 0 && (sent != -1 || errno == EINTR);
size -= sent > 0 ? sent : 0, data += sent > 0 ? sent : 0)
sent = send (client, (const char *) data, size, MSG_NOSIGNAL);
msleep (250);
// Drain the queue, if any
zmq_msg_t msg;
zmq_msg_init (&msg);
while (-1 != zmq_msg_recv (&msg, server, ZMQ_DONTWAIT)) {
zmq_msg_close (&msg);
zmq_msg_init (&msg);
}
// A well-behaved client should work while the malformed data from the other
// is being received
curve_client_data_t curve_client_data = {
fixed_server_public, fixed_client_public, fixed_client_secret};
void *client_mon;
void *client_good = create_and_connect_client (
my_endpoint, socket_config_curve_client, &curve_client_data, &client_mon);
bounce (server, client_good);
close (client);
test_context_socket_close_zero_linger (client_good);
test_context_socket_close_zero_linger (client_mon);
shutdown_context_and_server_side (zap_thread, server, server_mon, handler);
teardown_test_context ();
return 0;
}
#ifndef ZMQ_USE_FUZZING_ENGINE
void test_bind_curve_fuzzer ()
{
uint8_t **data;
size_t *len, num_cases = 0;
if (fuzzer_corpus_encode (
"tests/libzmq-fuzz-corpora/test_bind_curve_fuzzer_seed_corpus", &data,
&len, &num_cases)
!= 0)
exit (77);
while (num_cases-- > 0) {
TEST_ASSERT_SUCCESS_ERRNO (
LLVMFuzzerTestOneInput (data[num_cases], len[num_cases]));
free (data[num_cases]);
}
free (data);
free (len);
}
int main (int argc, char **argv)
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_bind_curve_fuzzer);
return UNITY_END ();
}
#endif
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