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/*
* Copyright (C) 2017 Nikos Mavrogiannopoulos
* Copyright (C) 2019 Tom Vrancken (dev@tomvrancken.nl)
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
/***
* This fuzzer tests the behavior of the GnuTLS library in client mode,
* specifically dealing with raw public keys during the handshake.
*
* The fuzzer corpus generated as first input was generated with the
* following parameters for gnutls-serv and gnutls-cli:
*
* gnutls-serv --priority NORMAL:+CTYPE-CLI-RAWPK:+CTYPE-SRV-RAWPK
* gnutls-cli localhost:5556 --priority NORMAL:-CTYPE-ALL:+CTYPE-CLI-RAWPK:+CTYPE-SRV-RAWPK --no-ca-verification
*
* The above yields a handshake where both the client and server present
* a raw public-key to eachother.
*/
#include <assert.h>
#include <fcntl.h>
#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <gnutls/gnutls.h>
#include "certs.h"
#include "mem.h"
#include "fuzzer.h"
int LLVMFuzzerTestOneInput(const uint8_t * data, size_t size)
{
IGNORE_CERTS;
int res;
gnutls_session_t session;
gnutls_certificate_credentials_t rawpk_cred;
struct mem_st memdata;
res = gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_ENABLE_RAWPK);
assert(res >= 0);
res = gnutls_certificate_allocate_credentials(&rawpk_cred);
assert(res >= 0);
res =
gnutls_certificate_set_rawpk_key_mem(rawpk_cred,
&rawpk_public_key1,
&rawpk_private_key1,
GNUTLS_X509_FMT_PEM,
NULL, 0, NULL, 0, 0);
assert(res >= 0);
gnutls_certificate_set_known_dh_params(rawpk_cred, GNUTLS_SEC_PARAM_MEDIUM);
res = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, rawpk_cred);
assert(res >= 0);
res = gnutls_priority_set_direct(session, "NORMAL:"VERS_STR":-CTYPE-ALL:+CTYPE-CLI-RAWPK:+CTYPE-SRV-RAWPK", NULL);
assert(res >= 0);
memdata.data = data;
memdata.size = size;
gnutls_transport_set_push_function(session, mem_push);
gnutls_transport_set_pull_function(session, mem_pull);
gnutls_transport_set_pull_timeout_function(session, mem_pull_timeout);
gnutls_transport_set_ptr(session, &memdata);
do {
res = gnutls_handshake(session);
} while (res < 0 && gnutls_error_is_fatal(res) == 0);
if (res >= 0) {
while (true) {
char buf[16384];
res = gnutls_record_recv(session, buf, sizeof(buf));
if (res <= 0) {
break;
}
}
}
gnutls_deinit(session);
gnutls_certificate_free_credentials(rawpk_cred);
return 0;
}
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