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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2023 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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.
*/
#include <stdint.h>
#include <fluent-bit.h>
#include <fluent-bit/flb_sds.h>
#include <fluent-bit/flb_aws_credentials.h>
#include <fluent-bit/flb_mem.h>
#include "flb_fuzz_header.h"
int initialization_crutch()
{
struct flb_config *config;
config = flb_config_init();
if (config == NULL) {
return -1;
}
flb_config_exit(config);
return 0;
}
void fuzz_sts(const uint8_t *data, size_t size) {
char *sks_response = get_null_terminated(150, &data, &size);
struct flb_aws_credentials *creds;
time_t expiration;
creds = flb_parse_sts_resp(sks_response, &expiration);
if (creds != NULL) {
flb_aws_credentials_destroy(creds);
}
if (size > 300) {
char *action = get_null_terminated(50, &data, &size);
char *role_arn = get_null_terminated(50, &data, &size);
char *session_name = get_null_terminated(50, &data, &size);
char *external_id = get_null_terminated(50, &data, &size);
char *identity_token = get_null_terminated(50, &data, &size);
flb_sds_t s1 = flb_sts_uri(action, role_arn, session_name,
external_id, identity_token);
if (s1 != NULL) {
flb_sds_destroy(s1);
}
flb_free(action);
flb_free(role_arn);
flb_free(session_name);
flb_free(external_id);
flb_free(identity_token);
}
if (sks_response != NULL) {
flb_free(sks_response);
}
}
void fuzz_http(const uint8_t *data, size_t size) {
time_t expiration;
struct flb_aws_credentials *creds = NULL;
char *response = get_null_terminated(250, &data, &size);
creds = flb_parse_http_credentials(response, 250, &expiration);
if (creds != NULL) {
flb_aws_credentials_destroy(creds);
}
flb_free(response);
}
void fuzz_process(const uint8_t *data, size_t size) {
char** tokens = NULL;
char *input = get_null_terminated(250, &data, &size);
tokens = parse_credential_process(input);
if (tokens != NULL) {
flb_free(tokens);
}
flb_free(input);
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
/* Set flb_malloc_mod to be fuzzer-data dependent */
if (size < 304) {
return 0;
}
flb_malloc_p = 0;
flb_malloc_mod = *(int*)data;
data += 4;
size -= 4;
/* Avoid division by zero for modulo operations */
if (flb_malloc_mod == 0) {
flb_malloc_mod = 1;
}
if (initialization_crutch() == -1) {
return 0;
}
const uint8_t *data_copy = data;
size_t size_copy = size;
fuzz_sts(data_copy, size_copy);
data_copy = data;
size_copy = size;
fuzz_http(data_copy, size_copy);
data_copy = data;
size_copy = size;
fuzz_process(data_copy, size_copy);
return 0;
}
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