#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <ctype.h>
#include <pwd.h>
#include <signal.h>
#include <login_cap.h>
#include <bsd_auth.h>
#include "sudo.h"
#include "sudo_auth.h"
#ifndef LOGIN_DEFROOTCLASS
# define LOGIN_DEFROOTCLASS "daemon"
#endif
extern char *login_style;
struct bsdauth_state {
auth_session_t *as;
login_cap_t *lc;
};
int
bsdauth_init(pw, auth)
struct passwd *pw;
sudo_auth *auth;
{
static struct bsdauth_state state;
if (pw->pw_class && *pw->pw_class)
state.lc = login_getclass(pw->pw_class);
else
state.lc = login_getclass(pw->pw_uid ? LOGIN_DEFCLASS : LOGIN_DEFROOTCLASS);
if (state.lc == NULL) {
log_error(USE_ERRNO|NO_MAIL,
"unable to get login class for user %s", pw->pw_name);
return AUTH_FATAL;
}
if ((state.as = auth_open()) == NULL) {
log_error(USE_ERRNO|NO_MAIL,
"unable to begin bsd authentication");
login_close(state.lc);
return AUTH_FATAL;
}
login_style = login_getstyle(state.lc, login_style, "auth-sudo");
if (login_style == NULL) {
log_error(NO_MAIL, "invalid authentication type");
auth_close(state.as);
login_close(state.lc);
return AUTH_FATAL;
}
if (auth_setitem(state.as, AUTHV_STYLE, login_style) < 0 ||
auth_setitem(state.as, AUTHV_NAME, pw->pw_name) < 0 ||
auth_setitem(state.as, AUTHV_CLASS, login_class) < 0) {
log_error(NO_MAIL, "unable to setup authentication");
auth_close(state.as);
login_close(state.lc);
return AUTH_FATAL;
}
auth->data = (void *) &state;
return AUTH_SUCCESS;
}
int
bsdauth_verify(pw, prompt, auth)
struct passwd *pw;
char *prompt;
sudo_auth *auth;
{
char *pass;
char *s;
size_t len;
int authok = 0;
sigaction_t sa, osa;
auth_session_t *as = ((struct bsdauth_state *) auth->data)->as;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sa.sa_handler = SIG_DFL;
(void) sigaction(SIGCHLD, &sa, &osa);
if ((s = auth_challenge(as)) == NULL) {
pass = tgetpass(prompt, def_passwd_timeout * 60, tgetpass_flags);
} else {
pass = tgetpass(s, def_passwd_timeout * 60, tgetpass_flags);
if (pass && *pass == '\0') {
if ((prompt = strrchr(s, '\n')))
prompt++;
else
prompt = s;
len = strlen(prompt) - 1;
while (isspace(prompt[len]) || prompt[len] == ':')
prompt[len--] = '\0';
easprintf(&s, "%s [echo on]: ", prompt);
pass = tgetpass(s, def_passwd_timeout * 60,
tgetpass_flags | TGP_ECHO);
free(s);
}
}
if (pass) {
authok = auth_userresponse(as, pass, 1);
zero_bytes(pass, strlen(pass));
}
(void) sigaction(SIGCHLD, &osa, NULL);
if (authok)
return AUTH_SUCCESS;
if (!pass)
return AUTH_INTR;
if ((s = auth_getvalue(as, "errormsg")) != NULL)
log_error(NO_MAIL, "%s", s);
return AUTH_FAILURE;
}
int
bsdauth_cleanup(pw, auth)
struct passwd *pw;
sudo_auth *auth;
{
struct bsdauth_state *state = auth->data;
if (state != NULL) {
auth_close(state->as);
login_close(state->lc);
}
return AUTH_SUCCESS;
}