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/*
* HTTP file download
*
* Copyright (c) 2016-2017 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#if defined(EMSCRIPTEN)
#define USE_BUILTIN_CRYPTO
#endif
#ifdef USE_BUILTIN_CRYPTO
#include "aes.h"
#include "sha256.h"
#else
#include <openssl/aes.h>
#include <openssl/sha.h>
#include <openssl/evp.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#endif
#define LOG() printf("%s:%d\n", __func__, __LINE__)
/* XHR */
/* err < 0: error (no data provided)
err = 0: end of transfer (data can be provided too)
err = 1: data chunk
*/
typedef void WGetWriteCallback(void *opaque, int err, void *data, size_t size);
typedef size_t WGetReadCallback(void *opaque, void *data, size_t size);
typedef struct XHRState XHRState;
XHRState *fs_wget(const char *url, const char *user, const char *password,
void *opaque, WGetWriteCallback *cb, BOOL single_write);
void fs_wget_free(XHRState *s);
void fs_wget_init(void);
void fs_wget_end(void);
#ifndef EMSCRIPTEN
typedef BOOL FSNetEventLoopCompletionFunc(void *opaque);
void fs_net_set_fdset(int *pfd_max, fd_set *rfds, fd_set *wfds, fd_set *efds,
int *ptimeout);
void fs_net_event_loop(FSNetEventLoopCompletionFunc *cb, void *opaque);
#endif
/* crypto */
extern const uint8_t encrypted_file_magic[4];
typedef int DecryptFileCB(void *opaque, const uint8_t *data, size_t len);
typedef struct DecryptFileState DecryptFileState;
DecryptFileState *decrypt_file_init(AES_KEY *aes_state,
DecryptFileCB *write_cb,
void *opaque);
int decrypt_file(DecryptFileState *s, const uint8_t *data,
size_t size);
int decrypt_file_flush(DecryptFileState *s);
void decrypt_file_end(DecryptFileState *s);
void pbkdf2_hmac_sha256(const uint8_t *pwd, int pwd_len,
const uint8_t *salt, int salt_len,
int iter, int key_len, uint8_t *out);
/* XHR file */
typedef void FSWGetFileCB(FSDevice *fs, FSFile *f, int64_t size, void *opaque);
void fs_wget_file2(FSDevice *fs, FSFile *f, const char *url,
const char *user, const char *password,
FSFile *posted_file, uint64_t post_data_len,
FSWGetFileCB *cb, void *opaque,
AES_KEY *aes_state);
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