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