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/*
* Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* https://www.openssl.org/source/license.html
* or in the file LICENSE in the source distribution.
*/
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <openssl/bio.h>
#include "fuzzer.h"
#include "internal/quic_srtm.h"
int FuzzerInitialize(int *argc, char ***argv)
{
FuzzerSetRand();
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS | OPENSSL_INIT_ASYNC, NULL);
OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
ERR_clear_error();
return 1;
}
/*
* Fuzzer input "protocol":
* Big endian
* Zero or more of:
* ADD - u8(0x00) u64(opaque) u64(seq_num) u128(token)
* REMOVE - u8(0x01) u64(opaque) u64(seq_num)
* CULL - u8(0x02) u64(opaque)
* LOOKUP - u8(0x03) u128(token) u64(idx)
*/
enum {
CMD_ADD,
CMD_REMOVE,
CMD_CULL,
CMD_LOOKUP,
CMD_MAX
};
#define MAX_CMDS 10000
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
int rc = 0;
QUIC_SRTM *srtm = NULL;
PACKET pkt;
unsigned int cmd;
uint64_t arg_opaque, arg_seq_num, arg_idx;
QUIC_STATELESS_RESET_TOKEN arg_token;
size_t limit = 0;
if ((srtm = ossl_quic_srtm_new(NULL, NULL)) == NULL) {
rc = -1;
goto err;
}
if (!PACKET_buf_init(&pkt, buf, len))
goto err;
while (PACKET_remaining(&pkt) > 0) {
if (!PACKET_get_1(&pkt, &cmd))
goto err;
if (++limit > MAX_CMDS) {
rc = 0;
goto err;
}
switch (cmd % CMD_MAX) {
case CMD_ADD:
if (!PACKET_get_net_8(&pkt, &arg_opaque)
|| !PACKET_get_net_8(&pkt, &arg_seq_num)
|| !PACKET_copy_bytes(&pkt, arg_token.token,
sizeof(arg_token.token)))
continue; /* just stop */
ossl_quic_srtm_add(srtm, (void *)(uintptr_t)arg_opaque,
arg_seq_num, &arg_token);
ossl_quic_srtm_check(srtm);
break;
case CMD_REMOVE:
if (!PACKET_get_net_8(&pkt, &arg_opaque)
|| !PACKET_get_net_8(&pkt, &arg_seq_num))
continue; /* just stop */
ossl_quic_srtm_remove(srtm, (void *)(uintptr_t)arg_opaque,
arg_seq_num);
ossl_quic_srtm_check(srtm);
break;
case CMD_CULL:
if (!PACKET_get_net_8(&pkt, &arg_opaque))
continue; /* just stop */
ossl_quic_srtm_cull(srtm, (void *)(uintptr_t)arg_opaque);
ossl_quic_srtm_check(srtm);
break;
case CMD_LOOKUP:
if (!PACKET_copy_bytes(&pkt, arg_token.token,
sizeof(arg_token.token))
|| !PACKET_get_net_8(&pkt, &arg_idx))
continue; /* just stop */
ossl_quic_srtm_lookup(srtm, &arg_token, (size_t)arg_idx,
NULL, NULL);
ossl_quic_srtm_check(srtm);
break;
default:
/* Other bytes are treated as no-ops */
continue;
}
}
rc = 0;
err:
ossl_quic_srtm_free(srtm);
return rc;
}
void FuzzerCleanup(void)
{
FuzzerClearRand();
}
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