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/*
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#include <nxt_sha1.h>
#include <nxt_websocket.h>
#include <nxt_websocket_header.h>
/* DO NOT TRY THIS AT HOME! */
#include <nxt_websocket_accept.c>
#define KMININPUTLENGTH 4
#define KMAXINPUTLENGTH 128
extern int LLVMFuzzerInitialize(int *argc, char ***argv);
extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
void nxt_base64_fuzz(const u_char *data, size_t size);
void nxt_djb_hash_fuzz(const u_char *data, size_t size);
void nxt_murmur_hash2_fuzz(const u_char *data, size_t size);
void nxt_parse_fuzz(const u_char *data, size_t size);
void nxt_sha1_fuzz(const u_char *data, size_t size);
void nxt_sha1_update_fuzz(const u_char *data, size_t size);
void nxt_term_fuzz(const u_char *data, size_t size);
void nxt_time_fuzz(const u_char *data, size_t size);
void nxt_uri_fuzz(const u_char *data, size_t size);
void nxt_utf8_fuzz(const u_char *data, size_t size);
void nxt_websocket_base64_fuzz(const u_char *data, size_t size);
void nxt_websocket_frame_fuzz(const u_char *data, size_t size);
extern char **environ;
int
LLVMFuzzerInitialize(int *argc, char ***argv)
{
if (nxt_lib_start("fuzzing", NULL, &environ) != NXT_OK) {
return NXT_ERROR;
}
return 0;
}
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
if (size < KMININPUTLENGTH || size > KMAXINPUTLENGTH) {
return 0;
}
nxt_base64_fuzz(data, size);
nxt_djb_hash_fuzz(data, size);
nxt_murmur_hash2_fuzz(data, size);
nxt_parse_fuzz(data, size);
nxt_sha1_fuzz(data, size);
nxt_sha1_update_fuzz(data, size);
nxt_term_fuzz(data, size);
nxt_time_fuzz(data, size);
nxt_uri_fuzz(data, size);
nxt_utf8_fuzz(data, size);
nxt_websocket_base64_fuzz(data, size);
nxt_websocket_frame_fuzz(data, size);
return 0;
}
void
nxt_base64_fuzz(const u_char *data, size_t size)
{
u_char buf[256];
ssize_t ret;
/*
* Validate base64 data before decoding.
*/
ret = nxt_base64_decode(NULL, (u_char *)data, size);
if (ret == NXT_ERROR) {
return;
}
nxt_base64_decode(buf, (u_char *)data, size);
}
void
nxt_djb_hash_fuzz(const u_char *data, size_t size)
{
nxt_djb_hash(data, size);
nxt_djb_hash_lowcase(data, size);
}
void
nxt_murmur_hash2_fuzz(const u_char *data, size_t size)
{
nxt_murmur_hash2(data, size);
nxt_murmur_hash2_uint32(data);
}
void
nxt_parse_fuzz(const u_char *data, size_t size)
{
nxt_str_t input;
input.start = (u_char *)data;
input.length = size;
nxt_int_parse(data, size);
nxt_size_t_parse(data, size);
nxt_size_parse(data, size);
nxt_off_t_parse(data, size);
nxt_str_int_parse(&input);
nxt_number_parse(&data, data + size);
}
void
nxt_sha1_fuzz(const u_char *data, size_t size)
{
u_char bin_accept[20];
nxt_sha1_t ctx;
nxt_sha1_init(&ctx);
nxt_sha1_update(&ctx, data, size);
nxt_sha1_final(bin_accept, &ctx);
}
void
nxt_sha1_update_fuzz(const u_char *data, size_t size)
{
u_char bin_accept[20];
nxt_sha1_t ctx;
nxt_sha1_init(&ctx);
nxt_sha1_update(&ctx, data, size);
nxt_sha1_update(&ctx, data, size);
nxt_sha1_final(bin_accept, &ctx);
}
void
nxt_term_fuzz(const u_char *data, size_t size)
{
nxt_term_parse(data, size, 0);
nxt_term_parse(data, size, 1);
}
void
nxt_time_fuzz(const u_char *data, size_t size)
{
nxt_time_parse(data, size);
}
void
nxt_uri_fuzz(const u_char *data, size_t size)
{
u_char *dst;
dst = nxt_zalloc(size * 3);
if (dst == NULL) {
return;
}
nxt_decode_uri(dst, (u_char *)data, size);
nxt_decode_uri_plus(dst, (u_char *)data, size);
nxt_memzero(dst, size * 3);
nxt_encode_uri(NULL, (u_char *)data, size);
nxt_encode_uri(dst, (u_char *)data, size);
nxt_free(dst);
}
void
nxt_utf8_fuzz(const u_char *data, size_t size)
{
const u_char *in;
in = data;
nxt_utf8_decode(&in, data + size);
nxt_utf8_casecmp((const u_char *)"ABC АБВ ΑΒΓ",
data,
nxt_length("ABC АБВ ΑΒΓ"),
size);
}
void
nxt_websocket_base64_fuzz(const u_char *data, size_t size)
{
u_char *out;
out = nxt_zalloc(size * 2);
if (out == NULL) {
return;
}
nxt_websocket_base64_encode(out, data, size);
nxt_free(out);
}
void
nxt_websocket_frame_fuzz(const u_char *data, size_t size)
{
u_char *input;
/*
* Resolve overwrites-const-input by using a copy of the data.
*/
input = nxt_malloc(size);
if (input == NULL) {
return;
}
nxt_memcpy(input, data, size);
nxt_websocket_frame_init(input, 0);
nxt_websocket_frame_header_size(input);
nxt_websocket_frame_payload_len(input);
nxt_free(input);
}
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