93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
#include "../../vm/debug.h"
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#include "../../vm/vm.h"
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#include <fstream>
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#include <iostream>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#define OPCODES_KEYLEN 15
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#define CODESIZE 0x300
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#define FLAG_LEN 30
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unsigned char EN_DATASECTION[] = {
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0x8c, 0xea, 0xbe, 0xaa, 0xed, 0xa0, 0xd0, 0x6b, 0x99, 0x1c, 0x52, 0x25,
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0xb9, 0xe6, 0xd8, 0xff, 0xf9, 0xe9, 0x92, 0x7a, 0x1c, 0xc5, 0xc4, 0x7e,
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0x2a, 0xec, 0x67, 0x32, 0x86, 0xca, 0xff, 0xf8, 0x3c, 0x1c, 0x77, 0x42,
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0xe3, 0x20, 0x29, 0x4b, 0x34, 0x67, 0x4b, 0xc9, 0x9f, 0xa9, 0xf9, 0x0c,
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0x0f, 0x9b, 0x8a, 0x5b, 0x72, 0x64, 0xe5, 0xd8, 0x5c, 0x52, 0x58, 0x46,
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0xef, 0x36, 0x76, 0x87, 0xec, 0x1e, 0xfb, 0x5d, 0x42, 0x8e, 0xb7, 0x47};
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unsigned int DATASECTIONLEN = 72;
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void gen_random(uint8_t *s, const int len) {
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srand(time(NULL));
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static const char alphanum[] = "0123456789"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz";
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for (int i = 0; i < len; ++i) {
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s[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
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}
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s[len] = 0;
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}
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int main(int argc, char *argv[]) {
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uint8_t *opcodes_key = new uint8_t[OPCODES_KEYLEN],
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*decdatasec = new uint8_t[DATASECTIONLEN],
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*flag = new uint8_t[FLAG_LEN];
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uint8_t *clientcode;
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uint8_t i;
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uint32_t clientcodesize, bytesread;
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FILE *datap, *flagp;
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gen_random(opcodes_key, OPCODES_KEYLEN);
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printf("Use this: \"%s\"\n", opcodes_key);
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printf("How much data are you sending me?\n");
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fflush(stdout);
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scanf("%d", &clientcodesize);
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printf("Go ahead then!\n");
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fflush(stdout);
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clientcode = new uint8_t[clientcodesize];
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bytesread = read(0, clientcode, clientcodesize);
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if (bytesread != clientcodesize) {
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printf("ERROR! Couldn't read everything!\n");
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fflush(stdout);
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exit(1);
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}
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VM vm(opcodes_key, clientcode, clientcodesize);
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vm.as.insData(EN_DATASECTION, DATASECTIONLEN);
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vm.run();
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datap = fopen("../res/decrypteddatasection.txt", "r");
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if (datap == NULL) {
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printf("Couldn't open decrypteddatasection.txt!\n");
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fflush(stdout);
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exit(1);
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}
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fscanf(datap, "%s", decdatasec);
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fclose(datap);
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for (i = 0; i < DATASECTIONLEN; i++) {
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DBG_INFO(("Checking data[%d]..\n", i));
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if (vm.as.data[i] != decdatasec[i]) {
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printf("Nope!\n");
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fflush(stdout);
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exit(1);
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}
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}
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flagp = fopen("../res/flag.txt", "r");
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if (flagp == NULL) {
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printf("Couldn't open flag.txt!\n");
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fflush(stdout);
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exit(1);
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}
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fscanf(flagp, "%s", flag);
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fclose(flagp);
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printf("Congratulations!\nThe flag is: %s\n", flag);
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fflush(stdout);
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return 0;
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} |