int print_info(const char *username)
{
struct pwdb_passwd *p = pwdb_getpwnam(username);
if (p != NULL) {
printf("Name: %s\n", p->pw_name);
printf("Passwd: %s\n", p->pw_passwd);
printf("Uid: %u\n", p->pw_uid);
printf("Gid: %u\n", p->pw_gid);
printf("Real name: %s\n", p->pw_gecos);
printf("Home dir: %s\n",p->pw_dir);
printf("Shell: %s\n", p->pw_shell);
return 0;
} else {
return NOUSER;
}
}
int read_userpwd(char *username){
struct pwdb_passwd *pw_entry;
pw_entry = pwdb_getpwnam(username);
char *password;
char salt[2];
strncpy(salt, pw_entry->pw_passwd, 2);
password = getpass("password: "******"user name could not be found.\n");
}else if(pwdb_errno==PWDB_FILEERR){
printf("could not access the file.\n");}
else if(pwdb_errno==PWDB_MEMERR){
printf("could not allocate memory for the struct pwdb_passwd.\n");}
else if(pwdb_errno==PWDB_ENTRERR){
printf("line in PWFILENAME somehow has invalid format.\n");
}return(0);
}else{*/
if(strcmp(crypt(password, salt), pw_entry-> pw_passwd)==0){
printf("User authenticated successfully. \n");
pw_entry->pw_failed = 0;
pw_entry->pw_age++;
pwdb_update_user(pw_entry);
if(pw_entry->pw_age>=10){
printf("WOOPS, time to change PW. \n");
}
return(1);
}else{
if(pw_entry->pw_failed>=5){
printf("User locked. \n");
}
pw_entry->pw_failed++;
pwdb_update_user(pw_entry);
printf("Unknown user or incorrect password. \n");
read_username(username);
return(0);
}
}
int main(int argc,char **argv){
struct pwdb_passwd *p;
if (argc<2) {
printf("Usage: pwdb_showuser username\n");
return(0);
}
p=pwdb_getpwnam(argv[1]);
if (p==NULL) {
printf("pwdb_getpwnam returned error: %s\n",pwdb_err2str(pwdb_errno));
return(0);
}
printf("User info:\n");
print_info(p);
return(0);
}
int print_userinfo(const char *username){
struct pwdb_passwd *pw_entry;
pw_entry=pwdb_getpwnam(username);
if (pw_entry!=NULL) {
printf("\nInfo from getpwnam() for user: %s\n",username);
printf("Name: %s\n",pw_entry->pw_name);
printf("Passwd: %s\n",pw_entry->pw_passwd);
printf("Uid: %d\n",pw_entry->pw_uid);
printf("Gid: %d\n",pw_entry->pw_gid);
printf("Real name: %s\n",pw_entry->pw_gecos);
printf("Shell: %s\n\n",pw_entry->pw_shell);
}
else return(NOUSER);
return(0);
}
void login () {
char username[USERNAME_SIZE];
int logged_in = 0;
while (!logged_in) {
read_username(username);
struct pwdb_passwd *p = pwdb_getpwnam(username);
if (p == NULL) {
printf("\nFound no user with name: %s\n", username);
} else {
char *passwd = crypt(getpass("password: "******"\nUser authenticated successfully\n");
logged_in = 1;
} else {
printf("\nUnknown user or incorrect password.\n");
}
}
}
}
int login(struct pwdb_passwd *info){
char username[USERNAME_SIZE];
char password[PASSWORD_SIZE];
/*
* Write "login: "******"Locked out!\n");
return 1;
}
read_password(password);
if (was_interrupted) return 1;
char *crypted = crypt(password, info->pw_passwd);
if (strncmp(info->pw_passwd, crypted, HASH_SIZE) == 0){
login_success(info);
printf("Logged in!\n");
return 0;
}
else {
login_failed(info);
printf("No!\n");
return 1;
}
}
int main(int argc,char **argv)
{
char *username;
char *buf;
size_t buflen, chread;
struct pwdb_passwd *p, *oldp;
int updt;
if (argc<2) {
printf("Usage: update_user username\n");
return(0);
}
username=argv[1];
oldp=pwdb_getpwnam(username);
if (oldp!=NULL)
updt=1;
else if ((oldp==NULL) && (pwdb_errno==PWDB_NOUSER))
updt=0;
else {
printf("pwdb_getpwnam return error: %s\n",pwdb_err2str(pwdb_errno));
return(0);
}
p=(struct pwdb_passwd *)malloc(sizeof(struct pwdb_passwd));
buf=NULL;
buflen=0;
p->pw_name=username;
chread=0;
while (1) {
printf("Password:"******"New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_passwd=oldp->pw_passwd;
break;
}
if (chread>0) {
p->pw_passwd=(char *)malloc(sizeof(char)*(chread+1));
strncpy(p->pw_passwd,buf,chread);
p->pw_passwd[chread]='\0';
break;
}
}
chread=0;
while (1) {
printf("Uid:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_uid=oldp->pw_uid;
break;
}
if (chread>0) {
p->pw_uid=atoi(buf);
break;
}
}
chread=0;
while (1) {
printf("Gid:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_gid=oldp->pw_gid;
break;
}
if (chread>0) {
p->pw_gid=atoi(buf);
break;
}
}
chread=0;
while (1) {
printf("Real name:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_gecos=oldp->pw_gecos;
break;
}
if (chread>0) {
p->pw_gecos=(char *)malloc(sizeof(char)*(chread+1));
strncpy(p->pw_gecos,buf,chread);
p->pw_gecos[chread]='\0';
break;
}
}
chread=0;
while (1) {
printf("Home directory:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_dir=oldp->pw_dir;
break;
}
if (chread>0) {
p->pw_dir=(char *)malloc(sizeof(char)*(chread+1));
strncpy(p->pw_dir,buf,chread);
p->pw_dir[chread]='\0';
break;
}
}
chread=0;
while (1) {
printf("Shell:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_shell=oldp->pw_shell;
break;
}
if (chread>0) {
p->pw_shell=(char *)malloc(sizeof(char)*(chread+1));
strncpy(p->pw_shell,buf,chread);
p->pw_shell[chread]='\0';
break;
}
}
chread=0;
while (1) {
printf("Failed:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_failed=oldp->pw_failed;
break;
}
if (chread>0) {
p->pw_failed=atoi(buf);
break;
}
}
chread=0;
while (1) {
printf("Age:");
chread=getline(&buf,&buflen,stdin);
buf[chread]='\0'; chread--; /* remove '\n' included by getline */
if ((!updt) && (chread<1))
printf("New user, so you must enter data\n");
if ((updt) && (chread<1)) {
p->pw_age=oldp->pw_age;
break;
}
if (chread>0) {
p->pw_age=atoi(buf);
break;
}
}
if (pwdb_update_user(p)!=0) {
printf("pwdb_update_user returned error %s\n",pwdb_err2str(pwdb_errno));
}
return(0);
}
int main(int argc, char **argv)
{
char username[USERNAME_SIZE];
char *password; // We store in heap, remember to free the memory.
char salt[SALT_SIZE];
struct pwdb_passwd *p;
// Disable CTRL-C termination
signal(SIGINT, SIG_IGN);
/*
* Write "login: "******"Unsuccessful login.");
return 0;
}
/*
* Write "password: "******"password: "******"This account has been locked, please contact an administrator.\n");
} else if (strcmp(password, p->pw_passwd) == 0) {
printf("Successful login.\n");
printf("Previous failed logins: %d\n", p->pw_failed);
if (p->pw_age > 10)
printf("Your password is old, please consider changing it.\n");
write_pw(PW_AGE, p->pw_age + 1, p);
write_pw(PW_FAILED, 0, p);
start_userterm(p);
} else {
printf("Unsuccessful login.\n");
write_pw(PW_FAILED, p->pw_failed + 1, p);
if (PW_FAILED > 5)
write_pw(PW_FAILED, -1, p);
}
memset(password, '0', strlen(password));
return 0;
}