52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ptrace.h>
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bool auth(char *s, int serial)
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{
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int key;
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int len;
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s[strcspn(s, "\n")] = 0;
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len = strnlen(s, 32);
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if (len <= 5)
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return 1;
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if (ptrace(PTRACE_TRACEME, 0, 1, 0) == -1) {
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puts("\x1B[32m.---------------------------.");
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puts("\x1B[31m| !! TAMPERING DETECTED !! |");
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puts("\x1B[32m'---------------------------'");
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return 1;
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}
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key = (s[3] ^ 4919) + 6221293;
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for (int i = 0; i < len; ++i) {
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if (s[i] <= 31)
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return 1;
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key += (key ^ (unsigned int)s[i]) % 1337;
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}
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return serial != key;
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}
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int main(void)
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{
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int serial;
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char s[28];
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puts("***********************************");
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puts("*\t\tlevel06\t\t *");
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puts("***********************************");
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printf("-> Enter Login: ");
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fgets(s, 32, stdin);
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puts("***********************************");
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puts("***** NEW ACCOUNT DETECTED ********");
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puts("***********************************");
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printf("-> Enter Serial: ");
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scanf("%d", &serial);
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if (auth(s, serial))
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return 1;
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puts("Authenticated!");
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system("/bin/sh");
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return 0;
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}
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