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finish 4.5; add 6.2.2

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firmianay
2017-11-28 17:12:21 +08:00
parent 1874b59e20
commit a2bfc392fd
11 changed files with 682 additions and 25 deletions
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src/writeup/6.2.2_re_ectf2016_tayy/tayy Executable file
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src/writeup/6.2.2_re_ectf2016_tayy/tayy.c Normal file
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int num2 = 0;
static char *option2 =
"=============================================================\n1. Ayy lmao, Tayy lmao.\n2. You are very cruel.\n3. Memes are lyf.\n4. Go away!.\n5. zzzz\n6. Cats > Dogs.\n7. Dogs > Cats.\n8. AI is overrated?.\n9. I dont like you.\n0. <exit to menu>\n> ";
static char *option1 =
"=============================================================\n1. Talk to Tayy.\n2. Flag?\n0. Exit.\n> ";
void print_random_tayy_response() {
const char *a[5];
a[0] = "Die, human!";
a[1] = "You are mean.";
a[2] = "I disagree.";
a[3] = "I agree.";
a[4] = "I dont understand.";
srand(time(NULL));
int r = rand()%5;
printf("Tayy: %s\n\n", a[r]);
}
void giff_flag (char *flg, int num1) {
// ASCII printable range 48-125
int i;
for (i=0;i<37;i++) {
switch (num2%2) {
case 0: flg[i] = (char) ((int)flg[i] + (num1*i)%37);
break;
case 1: flg[i] = (char) ((int)flg[i] - (num1*i)%37);
break;
}
}
num2++;
}
int main() {
// printf("========================");
// printf("Welcome to the chat-bot");
// ECTF{41_1S_D3f1n1t3lY_N0T_TH3_FuTUR3}
// 5146183
char buff[37];
char *flag = buff;
strcpy(flag, "EEXL\x83\x19\x18#\x1C@N5&[\x03g,q2H7?09:G>4!O]iJ('\nV");
int opt1, opt2;
printf("=============================================================\n");
printf("Welcome to the future of AI, developed by NIA Research, Tayy!\n");
printf("%s", option1);
scanf("%d", &opt1);
while(opt1!=0) {
switch(opt1) {
case 1: printf("%s", option2);
scanf("%d", &opt2);
if (opt2 == 0)
break;
giff_flag(flag, opt2);
print_random_tayy_response();
break;
case 2: printf("Flag: %s\n", flag);
break;
default: printf("Please enter a correct option.\n");
}
if (num2 == 8) {
printf("Tayy is getting real tired of your bullshit. Leave now!.\n");
break;
}
printf("%s", option1);
scanf("%d", &opt1);
}
return 0;
}