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#include "ndpi_api.h"
#include "fuzz_common_code.h"
#include <stdint.h>
#include <stdio.h>
#include <assert.h>
#include "fuzzer/FuzzedDataProvider.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
FuzzedDataProvider fuzzed_data(data, size);
struct ndpi_detection_module_struct *ndpi_info_mod;
struct ndpi_flow_struct flow;
u_int8_t protocol_was_guessed;
u_int32_t i, num;
u_int16_t random_proto, bool_value;
int random_value;
NDPI_PROTOCOL_BITMASK enabled_bitmask;
struct ndpi_lru_cache_stats lru_stats;
struct ndpi_patricia_tree_stats patricia_stats;
struct ndpi_automa_stats automa_stats;
int cat;
u_int16_t pid;
char *protoname;
char catname[] = "name";
struct ndpi_flow_input_info input_info;
ndpi_proto p;
if(fuzzed_data.remaining_bytes() < 4 + /* ndpi_init_detection_module() */
NDPI_MAX_SUPPORTED_PROTOCOLS + NDPI_MAX_NUM_CUSTOM_PROTOCOLS +
5 + /* files */
((NDPI_LRUCACHE_MAX + 1) * 5) + /* LRU caches */
2 + 1 + 5 + /* ndpi_set_detection_preferences() */
7 + /* Opportunistic tls */
2 + /* Pid */
2 + /* Category */
1 + /* Bool value */
2 + /* input_info */
29 /* Min real data: ip length + udp length + 1 byte */)
return -1;
/* To allow memory allocation failures */
fuzz_set_alloc_callbacks_and_seed(size);
ndpi_info_mod = ndpi_init_detection_module(fuzzed_data.ConsumeIntegral<u_int32_t>());
NDPI_BITMASK_RESET(enabled_bitmask);
for(i = 0; i < NDPI_MAX_SUPPORTED_PROTOCOLS + NDPI_MAX_NUM_CUSTOM_PROTOCOLS ; i++) {
if(fuzzed_data.ConsumeBool())
NDPI_BITMASK_ADD(enabled_bitmask, i);
}
if(ndpi_set_protocol_detection_bitmask2(ndpi_info_mod, &enabled_bitmask) == -1) {
ndpi_exit_detection_module(ndpi_info_mod);
ndpi_info_mod = NULL;
}
if(fuzzed_data.ConsumeBool())
ndpi_load_protocols_file(ndpi_info_mod, "protos.txt");
if(fuzzed_data.ConsumeBool())
ndpi_load_categories_file(ndpi_info_mod, "categories.txt", NULL);
if(fuzzed_data.ConsumeBool())
ndpi_load_risk_domain_file(ndpi_info_mod, "risky_domains.txt");
if(fuzzed_data.ConsumeBool())
ndpi_load_malicious_ja3_file(ndpi_info_mod, "ja3_fingerprints.csv");
if(fuzzed_data.ConsumeBool())
ndpi_load_malicious_sha1_file(ndpi_info_mod, "sha1_fingerprints.csv");
for(i = 0; i < NDPI_LRUCACHE_MAX + 1; i++) { /* + 1 to test invalid type */
ndpi_set_lru_cache_size(ndpi_info_mod, static_cast<lru_cache_type>(i),
fuzzed_data.ConsumeIntegralInRange(0, (1 << 16) - 1));
ndpi_get_lru_cache_size(ndpi_info_mod, static_cast<lru_cache_type>(i), &num);
ndpi_set_lru_cache_ttl(ndpi_info_mod, static_cast<lru_cache_type>(i),
fuzzed_data.ConsumeIntegralInRange(0, (1 << 24) - 1));
ndpi_get_lru_cache_ttl(ndpi_info_mod, static_cast<lru_cache_type>(i), &num);
}
if(fuzzed_data.ConsumeBool())
ndpi_set_detection_preferences(ndpi_info_mod, ndpi_pref_direction_detect_disable,
fuzzed_data.ConsumeBool());
if(fuzzed_data.ConsumeBool())
ndpi_set_detection_preferences(ndpi_info_mod, ndpi_pref_enable_tls_block_dissection,
0 /* unused */);
if(fuzzed_data.ConsumeBool())
ndpi_set_detection_preferences(ndpi_info_mod, ndpi_pref_max_packets_to_process,
fuzzed_data.ConsumeIntegralInRange(0, (1 << 24)));
ndpi_set_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_MAIL_SMTP, fuzzed_data.ConsumeBool());
ndpi_get_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_MAIL_SMTP);
ndpi_set_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_MAIL_IMAP, fuzzed_data.ConsumeBool());
ndpi_get_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_MAIL_IMAP);
ndpi_set_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_MAIL_POP, fuzzed_data.ConsumeBool());
ndpi_get_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_MAIL_POP);
ndpi_set_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_FTP_CONTROL, fuzzed_data.ConsumeBool());
ndpi_get_opportunistic_tls(ndpi_info_mod, NDPI_PROTOCOL_FTP_CONTROL);
random_proto = fuzzed_data.ConsumeIntegralInRange(0, (1 << 16) - 1);
random_value = fuzzed_data.ConsumeIntegralInRange(0,2); /* Only 0-1 are valid values */
ndpi_set_opportunistic_tls(ndpi_info_mod, random_proto, random_value);
ndpi_get_opportunistic_tls(ndpi_info_mod, random_proto);
ndpi_finalize_initialization(ndpi_info_mod);
/* Random protocol configuration */
pid = fuzzed_data.ConsumeIntegralInRange<u_int16_t>(0, ndpi_get_num_supported_protocols(ndpi_info_mod) + 1);
protoname = ndpi_get_proto_by_id(ndpi_info_mod, pid);
if (protoname) {
assert(ndpi_get_proto_by_name(ndpi_info_mod, protoname) == pid);
}
ndpi_set_proto_breed(ndpi_info_mod, pid, NDPI_PROTOCOL_SAFE);
ndpi_set_proto_category(ndpi_info_mod, pid, NDPI_PROTOCOL_CATEGORY_MEDIA);
ndpi_is_subprotocol_informative(ndpi_info_mod, pid);
/* Custom category configuration */
cat = fuzzed_data.ConsumeIntegralInRange(static_cast<int>(NDPI_PROTOCOL_CATEGORY_CUSTOM_1),
static_cast<int>(NDPI_PROTOCOL_CATEGORY_CUSTOM_5 + 1)); /* + 1 to trigger invalid cat */
ndpi_category_set_name(ndpi_info_mod, static_cast<ndpi_protocol_category_t>(cat), catname);
ndpi_is_custom_category(static_cast<ndpi_protocol_category_t>(cat));
ndpi_category_get_name(ndpi_info_mod, static_cast<ndpi_protocol_category_t>(cat));
ndpi_get_category_id(ndpi_info_mod, catname);
ndpi_get_num_supported_protocols(ndpi_info_mod);
/* Basic code to try testing this "config" */
bool_value = fuzzed_data.ConsumeBool();
input_info.in_pkt_dir = !!fuzzed_data.ConsumeBool();
input_info.seen_flow_beginning = !!fuzzed_data.ConsumeBool();
memset(&flow, 0, sizeof(flow));
std::vector<uint8_t>pkt = fuzzed_data.ConsumeRemainingBytes<uint8_t>();
assert(pkt.size() >= 29); /* To be sure check on fuzzed_data.remaining_bytes() at the beginning is right */
ndpi_detection_process_packet(ndpi_info_mod, &flow, pkt.data(), pkt.size(), 0, &input_info);
p = ndpi_detection_giveup(ndpi_info_mod, &flow, 1, &protocol_was_guessed);
assert(p.master_protocol == ndpi_get_flow_masterprotocol(ndpi_info_mod, &flow));
assert(p.app_protocol == ndpi_get_flow_appprotocol(ndpi_info_mod, &flow));
assert(p.category == ndpi_get_flow_category(ndpi_info_mod, &flow));
ndpi_get_lower_proto(p);
ndpi_get_upper_proto(p);
/* ndpi_guess_undetected_protocol() is a "strange" function (since is ipv4 only)
but it is exported by the library and it is used by ntopng. Try fuzzing it, here */
if(!flow.is_ipv6)
ndpi_guess_undetected_protocol(ndpi_info_mod, bool_value ? &flow : NULL,
flow.l4_proto,
flow.c_address.v4, flow.s_address.v4,
flow.c_port, flow.s_port);
/* Another "strange" function: fuzz it here, for lack of a better alternative */
ndpi_search_tcp_or_udp(ndpi_info_mod, &flow);
ndpi_free_flow_data(&flow);
/* Get some final stats */
for(i = 0; i < NDPI_LRUCACHE_MAX + 1; i++) /* + 1 to test invalid type */
ndpi_get_lru_cache_stats(ndpi_info_mod, static_cast<lru_cache_type>(i), &lru_stats);
for(i = 0; i < NDPI_PTREE_MAX + 1; i++) /* + 1 to test invalid type */
ndpi_get_patricia_stats(ndpi_info_mod, static_cast<ptree_type>(i), &patricia_stats);
for(i = 0; i < NDPI_AUTOMA_MAX + 1; i++) /* + 1 to test invalid type */
ndpi_get_automa_stats(ndpi_info_mod, static_cast<automa_type>(i), &automa_stats);
ndpi_exit_detection_module(ndpi_info_mod);
return 0;
}
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