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/*
* Copyright 2023 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_rcidm.h"
#include "internal/packet.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:
* RESET_WITH_ODCID u8(0x00) u8(cidl):cid
* RESET_WITHOUT_ODCID u8(0x01)
* (free and reallocate)
* ADD_FROM_INITIAL u8(0x02) u8(cidl):cid
* ADD_FROM_SERVER_RETRY u8(0x03) u8(cidl):cid
* ADD_FROM_NCID u8(0x04) u64(seq_num)
* u64(retire_prior_to) u8(cidl):cid
* ON_HANDSHAKE_COMPLETE u8(0x05)
* ON_PACKET_SENT u8(0x06) u64(num_pkt)
* REQUEST_ROLL u8(0x07)
* POP_RETIRE_SEQ_NUM u8(0x08)
* PEEK_RETIRE_SEQ_NUM u8(0x09)
* GET_PREFERRED_TX_DCID u8(0x0A)
* GET_PREFERRED_TX_DCID_CHANGED u8(0x0B) u8(clear)
*/
enum {
CMD_RESET_WITH_ODCID,
CMD_RESET_WITHOUT_ODCID,
CMD_ADD_FROM_INITIAL,
CMD_ADD_FROM_SERVER_RETRY,
CMD_ADD_FROM_NCID,
CMD_ON_HANDSHAKE_COMPLETE,
CMD_ON_PACKET_SENT,
CMD_REQUEST_ROLL,
CMD_POP_RETIRE_SEQ_NUM,
CMD_PEEK_RETIRE_SEQ_NUM,
CMD_GET_PREFERRED_TX_DCID,
CMD_GET_PREFERRED_TX_DCID_CHANGED
};
static int get_cid(PACKET *pkt, QUIC_CONN_ID *cid)
{
unsigned int cidl;
if (!PACKET_get_1(pkt, &cidl)
|| cidl > QUIC_MAX_CONN_ID_LEN
|| !PACKET_copy_bytes(pkt, cid->id, cidl))
return 0;
cid->id_len = (unsigned char)cidl;
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
int rc = 0;
QUIC_RCIDM *rcidm = NULL;
PACKET pkt;
uint64_t seq_num_out, arg_num_pkt;
unsigned int cmd, arg_clear;
QUIC_CONN_ID arg_cid, cid_out;
OSSL_QUIC_FRAME_NEW_CONN_ID ncid_frame;
if (!PACKET_buf_init(&pkt, buf, len))
goto err;
if ((rcidm = ossl_quic_rcidm_new(NULL)) == NULL)
goto err;
while (PACKET_remaining(&pkt) > 0) {
if (!PACKET_get_1(&pkt, &cmd))
goto err;
switch (cmd) {
case CMD_RESET_WITH_ODCID:
if (!get_cid(&pkt, &arg_cid)) {
rc = -1;
goto err;
}
ossl_quic_rcidm_free(rcidm);
if ((rcidm = ossl_quic_rcidm_new(&arg_cid)) == NULL)
goto err;
break;
case CMD_RESET_WITHOUT_ODCID:
ossl_quic_rcidm_free(rcidm);
if ((rcidm = ossl_quic_rcidm_new(NULL)) == NULL)
goto err;
break;
case CMD_ADD_FROM_INITIAL:
if (!get_cid(&pkt, &arg_cid)) {
rc = -1;
goto err;
}
ossl_quic_rcidm_add_from_initial(rcidm, &arg_cid);
break;
case CMD_ADD_FROM_SERVER_RETRY:
if (!get_cid(&pkt, &arg_cid)) {
rc = -1;
goto err;
}
ossl_quic_rcidm_add_from_server_retry(rcidm, &arg_cid);
break;
case CMD_ADD_FROM_NCID:
if (!PACKET_get_net_8(&pkt, &ncid_frame.seq_num)
|| !PACKET_get_net_8(&pkt, &ncid_frame.retire_prior_to)
|| !get_cid(&pkt, &ncid_frame.conn_id)) {
rc = -1;
goto err;
}
ossl_quic_rcidm_add_from_ncid(rcidm, &ncid_frame);
break;
case CMD_ON_HANDSHAKE_COMPLETE:
ossl_quic_rcidm_on_handshake_complete(rcidm);
break;
case CMD_ON_PACKET_SENT:
if (!PACKET_get_net_8(&pkt, &arg_num_pkt)) {
rc = -1;
goto err;
}
ossl_quic_rcidm_on_packet_sent(rcidm, arg_num_pkt);
break;
case CMD_REQUEST_ROLL:
ossl_quic_rcidm_request_roll(rcidm);
break;
case CMD_POP_RETIRE_SEQ_NUM:
ossl_quic_rcidm_pop_retire_seq_num(rcidm, &seq_num_out);
break;
case CMD_PEEK_RETIRE_SEQ_NUM:
ossl_quic_rcidm_peek_retire_seq_num(rcidm, &seq_num_out);
break;
case CMD_GET_PREFERRED_TX_DCID:
ossl_quic_rcidm_get_preferred_tx_dcid(rcidm, &cid_out);
break;
case CMD_GET_PREFERRED_TX_DCID_CHANGED:
if (!PACKET_get_1(&pkt, &arg_clear)) {
rc = -1;
goto err;
}
ossl_quic_rcidm_get_preferred_tx_dcid_changed(rcidm, arg_clear);
break;
default:
rc = -1;
goto err;
}
}
err:
ossl_quic_rcidm_free(rcidm);
return rc;
}
void FuzzerCleanup(void)
{
FuzzerClearRand();
}
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