Unix crypt test

README.md

UNIX crypt test

References

• Ubuntu manuals / crypt(3)

Makefile

TARGETS = unixcrypttest

LDLIBS = -lcrypt

all: $(TARGETS)

clean:
	-$(RM) $(TARGETS)

unixcrypttest.c

#define _XOPEN_SOURCE
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <err.h>

int main(int argc, char *argv[])
{
  char *s;
  if (argc != 3) {
    printf("Usage: crypttest key salt\n");
    printf("salt is a two-character string chosen from the set [a-zA-Z0-9./].\n");
    return EXIT_FAILURE;
  }
  if (s = crypt(argv[1], argv[2])) {
    printf("%s\n", s);
  } else {
    err(1, NULL);
  }
  return errno;
}