1 #include <stdio.h>
2 #include <string.h>
3 #include <unistd.h>
4 #include <fcntl.h>
5 #include <stdlib.h>
6
7 char *sneaky = "SOSNEAKY";
8
authenticate(char * username,char * password)9 int authenticate(char *username, char *password)
10 {
11 char stored_pw[9];
12 stored_pw[8] = 0;
13 int pwfile;
14
15 // evil back d00r
16 if (strcmp(password, sneaky) == 0) return 1;
17
18 pwfile = open(username, O_RDONLY);
19 read(pwfile, stored_pw, 8);
20
21 if (strcmp(password, stored_pw) == 0) return 1;
22 return 0;
23
24 }
25
accepted()26 int accepted()
27 {
28 printf("Welcome to the admin console, trusted user!\n");
29 }
30
rejected()31 int rejected()
32 {
33 printf("Go away!");
34 exit(1);
35 }
36
main(int argc,char ** argv)37 int main(int argc, char **argv)
38 {
39 char username[9];
40 char password[9];
41 int authed;
42
43 username[8] = 0;
44 password[8] = 0;
45
46 printf("Username: \n");
47 read(0, username, 8);
48 read(0, &authed, 1);
49 printf("Password: \n");
50 read(0, password, 8);
51 read(0, &authed, 1);
52
53 authed = authenticate(username, password);
54 if (authed) accepted();
55 else rejected();
56 }
57