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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <alloca.h>
  5.  
  6. int check_authentication(char *password) {
  7. 	char *password_buffer = alloca(16);
  8. 	int *auth_flag = alloca(4);
  9. 	*auth_flag = 0;
  10.  
  11. 	strcpy(password_buffer, password);
  12.  
  13. 	if(strcmp(password_buffer, "brillig") == 0)
  14. 		*auth_flag = 1;
  15. 	if(strcmp(password_buffer, "outgrabe") == 0)
  16. 		*auth_flag = 1;
  17.  
  18. 	return *auth_flag;
  19. }
  20.  
  21. int main(int argc, char *argv[]) {
  22. 	if(argc < 2) {
  23. 		printf("Usage: %s <password>\n", argv[0]);
  24. 		exit(0);
  25. 	}
  26. 	if(check_authentication(argv[1])) {
  27. 		printf("\n-=-=-=-=-=-=-=-=-=-=-=-=-=-\n");
  28. 		printf("      Access Granted.\n");
  29. 		printf("-=-=-=-=-=-=-=-=-=-=-=-=-=-\n");
  30. 	} else {
  31. 		printf("\nAccess Denied.\n");
  32.    }
  33. }
Success #stdin #stdout 0s 2156KB
comments (?)
stdin
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"\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08\xb6\x85\04\x08"
stdout
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Usage: ./prog <password>
https://ideone.com/ee5nWX
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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