Basic use of crypt in crack.c? (Hash “ROLF”)

Question

Here is a quick test case for crack direct from the CS50 AP material,

$ ./crack 50fkUxYHbnXGw
ROFL

Here is my code,

#define _XOPEN_SOURCE
#include <unistd.h>
#include <stdio.h>

int main(int argc, char * argv[])
{
    printf("%s\n", crypt("ROFL", "50"));
}

Now that's supposed to print 50fkUxYHbnXGw, correct (as per the example above cited from the docs)? Instead what I get is,

clang -ggdb3 -O0 -std=c11 -Wall -Werror -Wshadow crack.c -lcrypt -lcs50 -lm -o crack && ./crack
50JGnXUgaafgc

I am misuing char *crypt(const char *key, const char *salt);

Answer 1

Unfortunately, there was a typo in the spec. The first example given was correct:

 ./crack 50fkUxYHbnXGw
 rofl

but when repeated later in the spec, it showed ROFL in error.

This has been corrected. Thanks for the report.