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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2017, Max Dymond, <cmeister2@gmail.com>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include <curl/curl.h>
#include <testinput.h>
/**
* TLV types.
*/
#define TLV_TYPE_URL 1
#define TLV_TYPE_RESPONSE1 2
#define TLV_TYPE_USERNAME 3
#define TLV_TYPE_PASSWORD 4
#define TLV_TYPE_POSTFIELDS 5
#define TLV_TYPE_HEADER 6
#define TLV_TYPE_COOKIE 7
#define TLV_TYPE_UPLOAD1 8
#define TLV_TYPE_RANGE 9
#define TLV_TYPE_CUSTOMREQUEST 10
#define TLV_TYPE_MAIL_RECIPIENT 11
#define TLV_TYPE_MAIL_FROM 12
/**
* TLV function return codes.
*/
#define TLV_RC_NO_ERROR 0
#define TLV_RC_NO_MORE_TLVS 1
#define TLV_RC_SIZE_ERROR 2
/**
* Byte stream representation of the TLV header. Casting the byte stream
* to a TLV_RAW allows us to examine the type and length.
*/
typedef struct tlv_raw
{
/* Type of the TLV - 16 bits. */
uint8_t raw_type[2];
/* Length of the TLV data - 32 bits. */
uint8_t raw_length[4];
} TLV_RAW;
typedef struct tlv
{
/* Type of the TLV */
uint16_t type;
/* Length of the TLV data */
uint32_t length;
/* Pointer to data if length > 0. */
const uint8_t *value;
} TLV;
/**
* Internal state when parsing a TLV data stream.
*/
typedef struct fuzz_parse_state
{
/* Data stream */
const uint8_t *data;
size_t data_len;
/* Current position of our "cursor" in processing the data stream. */
size_t data_pos;
} FUZZ_PARSE_STATE;
/**
* Data local to a fuzzing run.
*/
typedef struct fuzz_data
{
/* CURL easy object */
CURL *easy;
/* Parser state */
FUZZ_PARSE_STATE state;
/* Response data and length */
const uint8_t *rsp1_data;
size_t rsp1_data_len;
/* Upload data and length; */
const uint8_t *upload1_data;
size_t upload1_data_len;
/* Singleton string fields. */
char *url;
char *username;
char *password;
char *postfields;
char *cookie;
char *range;
char *customrequest;
char *mail_from;
/* List of headers */
struct curl_slist *header_list;
/* List of mail recipients */
struct curl_slist *mail_recipients_list;
} FUZZ_DATA;
/* Function prototypes */
uint32_t to_u32(uint8_t b[4]);
uint16_t to_u16(uint8_t b[2]);
int fuzz_initialize_fuzz_data(FUZZ_DATA *fuzz,
const uint8_t *data,
size_t data_len);
void fuzz_terminate_fuzz_data(FUZZ_DATA *fuzz);
void fuzz_free(void **ptr);
static curl_socket_t fuzz_open_socket(void *ptr,
curlsocktype purpose,
struct curl_sockaddr *address);
static int fuzz_sockopt_callback(void *ptr,
curl_socket_t curlfd,
curlsocktype purpose);
static size_t fuzz_read_callback(char *buffer,
size_t size,
size_t nitems,
void *ptr);
int fuzz_get_first_tlv(FUZZ_DATA *fuzz, TLV *tlv);
int fuzz_get_next_tlv(FUZZ_DATA *fuzz, TLV *tlv);
int fuzz_get_tlv_comn(FUZZ_DATA *fuzz, TLV *tlv);
int fuzz_parse_tlv(FUZZ_DATA *fuzz, TLV *tlv);
char *fuzz_tlv_to_string(TLV *tlv);
/* Macros */
#define FTRY(FUNC) \
{ \
int _func_rc = (FUNC); \
if (_func_rc) \
{ \
rc = _func_rc; \
goto EXIT_LABEL; \
} \
}
#define FCHECK(COND) \
{ \
if (!(COND)) \
{ \
rc = 1; \
goto EXIT_LABEL; \
} \
}
#define FSINGLETONTLV(TLVNAME, FIELDNAME, OPTNAME) \
case TLVNAME: \
FCHECK(fuzz->FIELDNAME == NULL); \
fuzz->FIELDNAME = fuzz_tlv_to_string(tlv); \
FTRY(curl_easy_setopt(fuzz->easy, OPTNAME, fuzz->FIELDNAME)); \
break
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