source: bootcd/isolinux/syslinux-6.03/com32/cmenu/libmenu/passwords.h

#ifndef _PASSWORDS_H_
#define _PASSWORDS_H_

char authenticate_user(const char *username, const char *pwd);

char isallowed(const char *username, const char *perm);

// Initialise the list of of user passwords permissions from file
void init_passwords(const char *filename);
// Free all space used for internal data structures
void close_passwords(void);

#define MAX_USERS 128           // Maximum number of users
#define USERNAME_LENGTH 12      // Max length of user name
#define PWDHASH_LENGTH  40      // Max lenght of pwd hash

typedef struct {
    char username[USERNAME_LENGTH + 1];
    char pwdhash[PWDHASH_LENGTH + 1];
    char *perms;                // pointer to string containing ":" delimited permissions
} pwdentry;

typedef pwdentry *p_pwdentry;

#define GUEST_USER "guest"

#endif