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#include <stdio.h>

#include <stdlib.h>

#include <cstring>

#include <emscripten.h>

#include <emscripten/websocket.h>

#include <emscripten/bind.h>

#include <time.h>

#include "myfunc.h"

using namespace emscripten;

unsigned char mode = 0;

EMSCRIPTEN_WEBSOCKET_T socket = NULL;

uint8_t key[32];

uint8_t iv[16];

uint8_t revkey[32];

uint8_t reviv[16];

void _rnd(uint8_t* array, uint8_t* revarray, int len){

for(int i=0;i<len;i++){

uint8_t t = (uint8_t)(emscripten_random()*256);

revarray[len-i-1] = t;

array[i] = t;

}

void ar_ar(uint8_t* dest, uint8_t* src, int len){

for(int i=0;i<len;i++){

dest[i] = src[len-i];

}

void ll_ar(uint8_t* dest, int64_t src){

for(int i=0;i<8;i++){

dest[i] = (src & 0x00000000000000ff);

src >>= 8;

}

void l_ar(uint8_t* dest, int32_t src){

for(int i=0;i<4;i++){

dest[i] = (src & 0x000000ff);

src >>= 8;

}

void reqpq()

{

emscripten_pause_main_loop();

uint8_t in[105] ;

uint8_t out[64];

uint8_t enc_buf[64];

uint8_t revin[64] ;

_rnd(in,revin,64);

memcpy(&out, &in[0], 64);

memcpy(&key, &in[8], 32);

memcpy(&iv, &in[40], 16);

memcpy(&revkey, &revin[8], 32);

memcpy(&reviv, &revin[40], 16);

in[56]=0xef;

in[57]=0xef;

in[58]=0xef;

in[59]=0xef;

uint8_t req_pq[41];

char* ptrMsgID = getNewMsgId();

memcpy(&req_pq[1], ptrMsgID , 40);

req_pq[0]=0x0a;

memcpy(&in[64], &req_pq[0], 41);

char* ptrEncrypt = mycrypt(key, iv, in, sizeof(in));

memcpy(&enc_buf, ptrEncrypt , sizeof(enc_buf));

memcpy(&req_pq, ptrEncrypt+64 , sizeof(req_pq));

out[56]=enc_buf[56];

out[57]=enc_buf[57];

out[58]=enc_buf[58];

out[59]=enc_buf[59];

// char* ptrDecrypt = mycrypt(key, iv, out, sizeof(out));

// memcpy(&enc_buf, ptrDecrypt , sizeof(enc_buf));

//rintf("enc \n"); for(int i= 0; i< 64;i++){printf(" %02x", enc_buf[i]);if(!((i+1) % 16))printf("\n");} printf("\n");

emscripten_websocket_send_binary(socket, out, sizeof(out));

emscripten_websocket_send_binary(socket, req_pq , sizeof(req_pq));

emscripten_resume_main_loop();

}

void main_proc() {

switch (mode) {

case 0: {

unsigned short readyState;

emscripten_websocket_get_ready_state(socket, &readyState);

if( readyState == 1 ) mode = 1;

break;

}

case 1: {

reqpq();

mode = 2;

break;

}

case 2:{

mode = 3;

}

printf("step %2x\n",mode);

}

EM_BOOL WebSocketOpen(int eventType, const EmscriptenWebSocketOpenEvent *e, void *userData)

{

return 0;

}

EM_BOOL WebSocketClose(int eventType, const EmscriptenWebSocketCloseEvent *e, void *userData)

{

printf("close(eventType=%2x, wasClean=%2x, code=%2x, reason=%s, userData=%2x)\n", eventType, e->wasClean, e->code, e->reason, (int)userData);

return 0;

}

EM_BOOL WebSocketError(int eventType, const EmscriptenWebSocketErrorEvent *e, void *userData)

{

printf("error(eventType=%2x, userData=%2x)\n", eventType, (int)userData);

return 0;

}

EM_BOOL WebSocketMessage(int eventType, const EmscriptenWebSocketMessageEvent *e, void *userData)

{

printf("message(eventType=%2x, userData=%2x, data=%p, numBytes=%2x, isText=%2x)\n", eventType, (int)userData, e->data, e->numBytes, e->isText);

if (e->isText)

printf("text data: \"%s\"\n", e->data);

else

{

printf("binary data:");

for(int i = 0; i < e->numBytes; ++i)

printf(" %02X", e->data[i]);

printf("\n");

// emscripten_websocket_delete(e->socket);

char* ptrDecrypt = mycrypt(revkey, reviv, e->data, e->numBytes);

printf("binary data:");

for(int i = 0; i < e->numBytes; ++i)

printf(" %02X", (uint8_t)*ptrDecrypt++);

printf("\n");

emscripten_run_script("alert('look console.log')");

}

return 0;

}

void EMSCRIPTEN_KEEPALIVE connect(std::string url)

{

if (!emscripten_websocket_is_supported())

{

printf("WebSockets are not supported, cannot continue!\n");

exit(1);

}

EmscriptenWebSocketCreateAttributes attr;

emscripten_websocket_init_create_attributes(&attr);

attr.url = url.c_str();

socket = emscripten_websocket_new(&attr);

if (socket <= 0)

{

printf("WebSocket creation failed, error code %2x!\n", (EMSCRIPTEN_RESULT)socket);

exit(1);

}

emscripten_websocket_set_onopen_callback(socket, (void*)42, WebSocketOpen);

emscripten_websocket_set_onclose_callback(socket, (void*)43, WebSocketClose);

emscripten_websocket_set_onerror_callback(socket, (void*)44, WebSocketError);

emscripten_websocket_set_onmessage_callback(socket, (void*)45, WebSocketMessage);

emscripten_set_main_loop(main_proc, 60, 0);

}

EMSCRIPTEN_BINDINGS(my_module) {

function("connect", &connect);

}

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