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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/* Target Functions: s2n_negotiate s2n_flush s2n_handshake_write_io
s2n_handshake_read_io s2n_try_delete_session_cache
s2n_read_full_handshake_message */
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "api/s2n.h"
#include "stuffer/s2n_stuffer.h"
#include "tls/s2n_cipher_suites.h"
#include "tls/s2n_config.h"
#include "tls/s2n_connection.h"
#include "tls/s2n_crypto.h"
#include "tls/s2n_tls.h"
#include "tls/s2n_tls_parameters.h"
#include "utils/s2n_safety.h"
#include "s2n_test.h"
static char certificate_chain[] =
"-----BEGIN CERTIFICATE-----\n"
"MIICrTCCAZUCAn3VMA0GCSqGSIb3DQEBBQUAMB4xHDAaBgNVBAMME3MyblRlc3RJ\n"
"bnRlcm1lZGlhdGUwIBcNMTYwMzMwMTg1NzQzWhgPMjExNjAzMDYxODU3NDNaMBgx\n"
"FjAUBgNVBAMMDXMyblRlc3RTZXJ2ZXIwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw\n"
"ggEKAoIBAQDRw6AuYXAeRT0YuptCfJjRB/EDJyyGXnv+8TV2H1WJWhMLk8qND27r\n"
"79A6EjbVmJaOV9qrokVqpDmXS712Z3BDprJ+1LFMymm3A+AFuK/skeGy0skik+Tg\n"
"MmFT5XBVvmsw4uB1S9uUqktHauXgjhFPPsfvk4ewL4LulVEN2TEeI1Odj4CaMxAO\n"
"Iuowm8wI2OHVzRHlrRmyJ9hYGuHHQ2TaTGIjr3WpAFuXi9pHGGMYa0uXAVPmgjdE\n"
"XZ8t46u/ZKQ9W1uJkZEVKhcijT7G2VBrsBUq0CDiL+TDaGfthnBzUc9zt4fx/S/3\n"
"qulC2WbKI3xrasQyjrsHTAJ75Md3rK09AgMBAAEwDQYJKoZIhvcNAQEFBQADggEB\n"
"AHHkXNA9BtgAebZC2zriW4hRfeIkJMOwvfKBXHTuY5iCLD1otis6AZljcCKXM6O9\n"
"489eHBC4T6mJwVsXhH+/ccEKqNRD2bUfQgOij32PsteV1eOHfHIFqdJmnBVb8tYa\n"
"jxUvy7UQvXrPqaHbODrHe+7f7r1YCzerujiP5SSHphY3GQq88KemfFczp/4GnYas\n"
"sE50OYe7DQcB4zvnxmAXp51JIN4ooktUU9oKIM5y2cgEWdmJzeqPANYxf0ZIPlTg\n"
"ETknKw1Dzf8wlK5mFbbG4LPQh1mkDVcwQV3ogG6kGMRa7neH+6SFkNpAKuPCoje4\n"
"NAE+WQ5ve1wk7nIRTQwDAF4=\n"
"-----END CERTIFICATE-----\n"
"-----BEGIN CERTIFICATE-----\n"
"MIIDKTCCAhGgAwIBAgICVxYwDQYJKoZIhvcNAQEFBQAwFjEUMBIGA1UEAwwLczJu\n"
"VGVzdFJvb3QwIBcNMTYwMzMwMTg1NzA5WhgPMjExNjAzMDYxODU3MDlaMB4xHDAa\n"
"BgNVBAMME3MyblRlc3RJbnRlcm1lZGlhdGUwggEiMA0GCSqGSIb3DQEBAQUAA4IB\n"
"DwAwggEKAoIBAQDM/i3eclxYcvedPCEnVe6A/HYsYPeP1qKBZQhbpuuX061jFZKw\n"
"lecb0eau1PORLbcsYK40u3xUzoA5u6Q0ebDuqPbqSJkCazsh66cu9STl8ubbk7oI\n"
"8LJjUJFhhy2Jmm9krXhPyRscU+CXOCZ2G1GhBqTI8cgMYhEVHwb3qy1EHg6G3n4W\n"
"AjV+cKQcbUytq8DRmVe0bNJxDOX8ivzfAp3lUIwub+JfpxrWIUhb3iVGj5CauI98\n"
"bNFHTWwYp7tviIIi21Q+L3nExCyE4yTUP/mebBZ62JnbvsWSs3r3//Am5d8G3WdY\n"
"BXsERoDoLBvHnqlO/oo4ppGCRI7GkDroACi/AgMBAAGjdzB1MAwGA1UdEwQFMAMB\n"
"Af8wHQYDVR0OBBYEFGqUKVWVlL03sHuOggFACdlHckPBMEYGA1UdIwQ/MD2AFE2X\n"
"AbNDryMlBpMNI6Ce927uUFwToRqkGDAWMRQwEgYDVQQDDAtzMm5UZXN0Um9vdIIJ\n"
"ANDUkH+UYdz1MA0GCSqGSIb3DQEBBQUAA4IBAQA3O3S9VT0EC1yG4xyNNUZ7+CzF\n"
"uFA6uiO38ygcN5Nz1oNPy2eQer7vYmrHtqN6gS/o1Ag5F8bLRCqeuZTsOG80O29H\n"
"kNhs5xYprdU82AqcaWwEd0kDrhC5rEvs6fj1J0NKmmhbovYxuDboj0a7If7HEqX0\n"
"NizyU3M3JONPZgadchZ+F5DosatF1Bpt/gsQRy383IogQ0/FS+juHCCc4VIUemuk\n"
"YY1J8o5XdrGWrPBBiudTWqCobe+N541b+YLWbajT5UKzvSqJmcqpPTniJGc9eZxc\n"
"z3cCNd3cKa9bK51stEnQSlA7PQXYs3K+TD3EmSn/G2x6Hmfr7lrpbIhEaD+y\n"
"-----END CERTIFICATE-----\n"
"-----BEGIN CERTIFICATE-----\n"
"MIIDATCCAemgAwIBAgIJANDUkH+UYdz1MA0GCSqGSIb3DQEBCwUAMBYxFDASBgNV\n"
"BAMMC3MyblRlc3RSb290MCAXDTE2MDMzMDE4NTYzOVoYDzIxMTYwMzA2MTg1NjM5\n"
"WjAWMRQwEgYDVQQDDAtzMm5UZXN0Um9vdDCCASIwDQYJKoZIhvcNAQEBBQADggEP\n"
"ADCCAQoCggEBAMY5532000oaeed7Jmo3ssx1723ZDLpn3WGz6FxpWM0zsKA/YvdD\n"
"7J6qXDvfxU6dZlmsCS+bSNAqpARKmKsBEDPTsdLmrN1V1clOxvKm6GvU1eloRTw6\n"
"xukEUXJ+uxrQMLYvSJBiCBVGI+UYNCK5c6guNMRYBCGdk5/iayjmK0Nxz1918Cx9\n"
"z4va8HPAgYIz0ogOdYB21O9FQGPdH1mYqRzljcSsZ7EFo1P8HJr8oKK76ZeYi2or\n"
"pjzMHGnlufHaul508wQPeFAMa1Tku3HyGZRaieRAck6+QcO2NujXxKNyCBlWON23\n"
"FQTuBjN/CAl74MZtcAM2hVSmpm9t4cWVN5MCAwEAAaNQME4wHQYDVR0OBBYEFE2X\n"
"AbNDryMlBpMNI6Ce927uUFwTMB8GA1UdIwQYMBaAFE2XAbNDryMlBpMNI6Ce927u\n"
"UFwTMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBAAXkVvQdXDmozPix\n"
"uZi1o9cw4Si0syqfJ4sSunrzPbbmw/Qxhth5V7XGrnsQVNxamgnbzpjGhiBF6isM\n"
"ldj33zQYtke+ojOjFlhEvrPo6eW29RkLBEtJadGs2bkMLztJbf+cbH2u6irzr6S4\n"
"3OgVOSuB+zG56ksTnEVmum+C/8tSIAyi3eaoStPcgEU8+3/KMrH7uuenmTOCKdD1\n"
"FvSDHXT9qPgTttVQGXbXzJEr5tGE+Py6yib5uoJ0dJZNtjs7HOQEDk5J0wZaX0DC\n"
"MShYLiN5qLJAk0qwl+js488BJ18M9dg4TxdBYFkwHSzKXSj9TJN77Bb0RZr8LL9T\n"
"r9IyvfU=\n"
"-----END CERTIFICATE-----\n";
static char private_key[] =
"-----BEGIN RSA PRIVATE KEY-----\n"
"MIIEpAIBAAKCAQEA0cOgLmFwHkU9GLqbQnyY0QfxAycshl57/vE1dh9ViVoTC5PK\n"
"jQ9u6+/QOhI21ZiWjlfaq6JFaqQ5l0u9dmdwQ6ayftSxTMpptwPgBbiv7JHhstLJ\n"
"IpPk4DJhU+VwVb5rMOLgdUvblKpLR2rl4I4RTz7H75OHsC+C7pVRDdkxHiNTnY+A\n"
"mjMQDiLqMJvMCNjh1c0R5a0ZsifYWBrhx0Nk2kxiI691qQBbl4vaRxhjGGtLlwFT\n"
"5oI3RF2fLeOrv2SkPVtbiZGRFSoXIo0+xtlQa7AVKtAg4i/kw2hn7YZwc1HPc7eH\n"
"8f0v96rpQtlmyiN8a2rEMo67B0wCe+THd6ytPQIDAQABAoIBAF3evYAD+riRI5Y9\n"
"a92FBJ4Gf8R5c2NuRO8B4nrJ6u1ccclsieg2T90lpHlYTVGoxzdL+X91Trs6Ysti\n"
"CZdDEuozXw2DARTsQAK2qTnmPFQRtH7h9UCUDoiGAygYNP0qCa4G2YukNs+Apc9/\n"
"9v9WlEhyP+bmjoI5wM4j4/HekCx7syHuiqJ74//oTzNamT0aWHwgXAUmEYZ/1+nT\n"
"0KInmtmIOFgsWHcojwQ6sZJ3eVvy66EqHLZKQYZa2tx0YjrEJMQi1drg6VV+lLCR\n"
"rEtsoltgdN2G9v3P6KrHXsrCYaaZKhog9B1OSI2Amv3YWZHXppK12+aSy774lUUz\n"
"qVur5cECgYEA7oCOQoRZo76wztS+yDeq173B2gPHKSIrWvaLDkCAPOQPVzJZ4Qc+\n"
"8OEDU6HB9P0MYDsKBxZY85uzWP+dAlsmcL0C86WibOuYERPKQIcAn3KSzFiIxH3R\n"
"OAbaLtSLN3lDAH50PhP9BguiSfBjI6w4Qsr7jlQgdpzG4h4LjvotbWMCgYEA4SdT\n"
"QQJhHiLtBFo91ItRUzhePvUDfV8XvNfAwZj8cY2+oenkK2+bp35xteBV6Gu1cYnd\n"
"V2yFgzMZ/jDvqfUn/8EVAGvEFrLtsUpXeyHhgmVT490RsPxC9xU9jf5LsvZ4zjsj\n"
"CsFZW0JnhKkF6M5wztWtO3yKCilmXSOIFvorTN8CgYEAoK2LKdTwbxhxFWbOgSS/\n"
"vEji6HXTHysd+lJOrHNX8a3Th/MsCiZPiQiOrTE08k/onown3U547uXelf7fUE8I\n"
"PruX2X2lR6wQ7rBeecp56PHPZEvhGD+LTCuRoise/2h6c0K+HXRp6kC8PQPuRoIo\n"
"BRerEeArXr2QX5XOQ6zYHfECgYEAp0L9mDfaSfcMOMWJVVJCEh639PEzrHluOv3U\n"
"1n1+XCU+zy3gMVxyN9W5R7HmYAlT+4q9geq+rJ7T2oAkKxBSrK6VmYB1ZZ968NAX\n"
"eQPMcYAw+AAM2nwsiz2eQtP9DHAJgrtv5teIOEF2gZjHKRHjv+QBE0YLjkz/HIX+\n"
"3YLvk+UCgYAgpAWk4YW4dAcZ8Y04Ke2pjMvEu44hHphOmk6AZl0Xl9tJwxlV8GVx\n"
"o3L4hbjHqyJo3+DZZYM7udMx9axbX9JHYRaLNJpc8UxQZj7d3TehC9Dw9/DzhIy/\n"
"6sml30j/GHvnW5DOlpsdNKDlxoFX+hncXYIjyVTGRNdsSwa4VVm+Xw==\n"
"-----END RSA PRIVATE KEY-----\n";
static char dhparams[] =
"-----BEGIN DH PARAMETERS-----\n"
"MIIBCAKCAQEAy1+hVWCfNQoPB+NA733IVOONl8fCumiz9zdRRu1hzVa2yvGseUSq\n"
"Bbn6k0FQ7yMED6w5XWQKDC0z2m0FI/BPE3AjUfuPzEYGqTDf9zQZ2Lz4oAN90Sud\n"
"luOoEhYR99cEbCn0T4eBvEf9IUtczXUZ/wj7gzGbGG07dLfT+CmCRJxCjhrosenJ\n"
"gzucyS7jt1bobgU66JKkgMNm7hJY4/nhR5LWTCzZyzYQh2HM2Vk4K5ZqILpj/n0S\n"
"5JYTQ2PVhxP+Uu8+hICs/8VvM72DznjPZzufADipjC7CsQ4S6x/ecZluFtbb+ZTv\n"
"HI5CnYmkAwJ6+FSWGaZQDi8bgerFk9RWwwIBAg==\n"
"-----END DH PARAMETERS-----\n";
static int MAX_NEGOTIATION_ATTEMPTS = 10;
int buffer_read(void *io_context, uint8_t *buf, uint32_t len)
{
struct s2n_stuffer *in_buf;
int n_read, n_avail;
if (buf == NULL) {
return S2N_SUCCESS;
}
in_buf = (struct s2n_stuffer *) io_context;
if (in_buf == NULL) {
errno = EINVAL;
return -1;
}
/* read the number of bytes requested or less if it isn't available */
n_avail = s2n_stuffer_data_available(in_buf);
n_read = (len < n_avail) ? len : n_avail;
if (n_read == 0) {
errno = EAGAIN;
return -1;
}
s2n_stuffer_read_bytes(in_buf, buf, n_read);
return n_read;
}
int buffer_write(void *io_context, const uint8_t *buf, uint32_t len)
{
return len;
}
static struct s2n_config *client_config;
int s2n_fuzz_init(int *argc, char **argv[])
{
/* Set up Server Config */
POSIX_ENSURE_REF(client_config = s2n_config_new());
POSIX_GUARD(s2n_config_add_cert_chain_and_key(client_config, certificate_chain, private_key));
POSIX_GUARD(s2n_config_add_dhparams(client_config, dhparams));
return S2N_SUCCESS;
}
int s2n_fuzz_test(const uint8_t *buf, size_t len)
{
S2N_FUZZ_ENSURE_MIN_LEN(len, S2N_TLS_RECORD_HEADER_LENGTH);
struct s2n_stuffer in = {0};
POSIX_GUARD(s2n_stuffer_alloc(&in, len));
POSIX_GUARD(s2n_stuffer_write_bytes(&in, buf, len));
/* Set up Server Connection */
struct s2n_connection *client_conn;
POSIX_ENSURE_REF(client_conn = s2n_connection_new(S2N_CLIENT));
POSIX_GUARD(s2n_connection_set_recv_cb(client_conn, &buffer_read));
POSIX_GUARD(s2n_connection_set_send_cb(client_conn, &buffer_write));
POSIX_GUARD(s2n_connection_set_recv_ctx(client_conn, &in));
POSIX_GUARD(s2n_connection_set_config(client_conn, client_config));
POSIX_GUARD(s2n_connection_set_blinding(client_conn, S2N_SELF_SERVICE_BLINDING));
client_conn->delay = 0;
/* Let Server receive data and attempt Negotiation */
int num_attempted_negotiations = 0;
s2n_blocked_status client_blocked;
do {
s2n_negotiate(client_conn, &client_blocked);
num_attempted_negotiations += 1;
} while(!client_blocked && num_attempted_negotiations < MAX_NEGOTIATION_ATTEMPTS);
/* Clean up */
s2n_shutdown(client_conn, &client_blocked);
POSIX_GUARD(s2n_connection_free(client_conn));
POSIX_GUARD(s2n_stuffer_free(&in));
return S2N_SUCCESS;
}
static void s2n_fuzz_cleanup()
{
s2n_config_free(client_config);
}
S2N_FUZZ_TARGET(s2n_fuzz_init, s2n_fuzz_test, s2n_fuzz_cleanup)
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