/*
* If we have setauthdb, retrieve the password registry for the user's
* account then feed it to setauthdb. This may load registry-specific method
* code. If we don't have setauthdb or have already called it this is a no-op.
*/
void
aix_setauthdb(const char *user)
{
# ifdef HAVE_SETAUTHDB
static char *registry = NULL;
if (registry != NULL) /* have already done setauthdb */
return;
if (setuserdb(S_READ) == -1) {
debug3("%s: Could not open userdb to read", __func__);
return;
}
if (getuserattr((char *)user, S_REGISTRY, ®istry, SEC_CHAR) == 0) {
if (setauthdb(registry, NULL) == 0)
debug3("%s: AIX/setauthdb set registry %s", __func__,
registry);
else
debug3("%s: AIX/setauthdb set registry %s failed: %s",
__func__, registry, strerror(errno));
} else
debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
strerror(errno));
enduserdb();
# endif
}
/*
* aix_krb5_get_principal_name: returns the user's kerberos client principal name if
* configured, otherwise NULL. Caller must free returned string.
*/
char *
aix_krb5_get_principal_name(char *pw_name)
{
char *authname = NULL, *authdomain = NULL, *principal = NULL;
setuserdb(S_READ);
if (getuserattr(pw_name, S_AUTHDOMAIN, &authdomain, SEC_CHAR) != 0)
debug("AIX getuserattr S_AUTHDOMAIN: %s", strerror(errno));
if (getuserattr(pw_name, S_AUTHNAME, &authname, SEC_CHAR) != 0)
debug("AIX getuserattr S_AUTHNAME: %s", strerror(errno));
if (authdomain != NULL)
xasprintf(&principal, "%s@%s", authname ? authname : pw_name, authdomain);
else if (authname != NULL)
principal = xstrdup(authname);
enduserdb();
return principal;
}
/*
* If we have setauthdb, retrieve the password registry for the user's
* account then feed it to setauthdb. This will mean that subsequent AIX auth
* functions will only use the specified loadable module. If we don't have
* setauthdb this is a no-op.
*/
void
aix_setauthdb(const char *user)
{
# ifdef HAVE_SETAUTHDB
char *registry;
if (setuserdb(S_READ) == -1) {
debug3("%s: Could not open userdb to read", __func__);
return;
}
if (getuserattr((char *)user, S_REGISTRY, ®istry, SEC_CHAR) == 0) {
if (setauthdb(registry, old_registry) == 0)
debug3("AIX/setauthdb set registry '%s'", registry);
else
debug3("AIX/setauthdb set registry '%s' failed: %s",
registry, strerror(errno));
} else
debug3("%s: Could not read S_REGISTRY for user: %s", __func__,
strerror(errno));
enduserdb();
# endif /* HAVE_SETAUTHDB */
}
static int
#if defined(USE_PAM) || defined(_AIX)
isNoPassAllowed( const char *un )
{
struct passwd *pw = 0;
# ifdef HAVE_GETSPNAM /* (sic!) - not USESHADOW */
struct spwd *spw;
# endif
#else
isNoPassAllowed( const char *un, struct passwd *pw )
{
#endif
struct group *gr;
char **fp;
int hg;
if (!*un)
return 0;
if (cursource != PWSRC_MANUAL)
return 1;
for (hg = 0, fp = td->noPassUsers; *fp; fp++)
if (**fp == '@')
hg = 1;
else if (!strcmp( un, *fp ))
return 1;
else if (!strcmp( "*", *fp )) {
#if defined(USE_PAM) || defined(_AIX)
if (!(pw = getpwnam( un )))
return 0;
if (pw->pw_passwd[0] == '!' || pw->pw_passwd[0] == '*')
continue;
# ifdef HAVE_GETSPNAM /* (sic!) - not USESHADOW */
if ((spw = getspnam( un )) &&
(spw->sp_pwdp[0] == '!' || spw->sp_pwdp[0] == '*'))
continue;
# endif
#endif
if (pw->pw_uid)
return 1;
}
#if defined(USE_PAM) || defined(_AIX)
if (hg && (pw || (pw = getpwnam( un )))) {
#else
if (hg) {
#endif
for (setgrent(); (gr = getgrent()); )
for (fp = td->noPassUsers; *fp; fp++)
if (**fp == '@' && !strcmp( gr->gr_name, *fp + 1 )) {
if (pw->pw_gid == gr->gr_gid) {
endgrent();
return 1;
}
for (; *gr->gr_mem; gr->gr_mem++)
if (!strcmp( un, *gr->gr_mem )) {
endgrent();
return 1;
}
}
endgrent();
}
return 0;
}
#if !defined(USE_PAM) && !defined(_AIX) && defined(HAVE_SETUSERCONTEXT)
# define LC_RET0 do { login_close(lc); return 0; } while(0)
#else
# define LC_RET0 return 0
#endif
int
verify( GConvFunc gconv, int rootok )
{
#ifdef USE_PAM
const char *psrv;
struct pam_data pdata;
int pretc, pnopass;
char psrvb[64];
#elif defined(_AIX)
char *msg, *curret;
int i, reenter;
#else
struct stat st;
const char *nolg;
char *buf;
int fd;
# ifdef HAVE_GETUSERSHELL
char *s;
# endif
# if defined(HAVE_STRUCT_PASSWD_PW_EXPIRE) || defined(USESHADOW)
int tim, expir, warntime, quietlog;
# endif
#endif
debug( "verify ...\n" );
#ifdef USE_PAM
pnopass = FALSE;
if (!strcmp( curtype, "classic" )) {
if (!gconv( GCONV_USER, 0 ))
return 0;
if (isNoPassAllowed( curuser )) {
gconv( GCONV_PASS_ND, 0 );
if (!*curpass) {
pnopass = TRUE;
sprintf( psrvb, "%.31s-np", PAMService );
psrv = psrvb;
} else
psrv = PAMService;
} else
psrv = PAMService;
pdata.usecur = TRUE;
} else {
sprintf( psrvb, "%.31s-%.31s", PAMService, curtype );
psrv = psrvb;
pdata.usecur = FALSE;
}
pdata.gconv = gconv;
if (!doPAMAuth( psrv, &pdata ))
return 0;
#elif defined(_AIX)
if ((td->displayType & d_location) == dForeign) {
char *tmpch;
strncpy( hostname, td->name, sizeof(hostname) - 1 );
hostname[sizeof(hostname)-1] = '\0';
if ((tmpch = strchr( hostname, ':' )))
*tmpch = '\0';
} else
hostname[0] = '\0';
/* tty names should only be 15 characters long */
# if 0
for (i = 0; i < 15 && td->name[i]; i++) {
if (td->name[i] == ':' || td->name[i] == '.')
tty[i] = '_';
else
tty[i] = td->name[i];
}
tty[i] = '\0';
# else
memcpy( tty, "/dev/xdm/", 9 );
for (i = 0; i < 6 && td->name[i]; i++) {
if (td->name[i] == ':' || td->name[i] == '.')
tty[9 + i] = '_';
else
tty[9 + i] = td->name[i];
}
tty[9 + i] = '\0';
# endif
if (!strcmp( curtype, "classic" )) {
if (!gconv( GCONV_USER, 0 ))
return 0;
if (isNoPassAllowed( curuser )) {
gconv( GCONV_PASS_ND, 0 );
if (!*curpass) {
debug( "accepting despite empty password\n" );
goto done;
}
} else
if (!gconv( GCONV_PASS, 0 ))
return 0;
enduserdb();
msg = NULL;
if ((i = authenticate( curuser, curpass, &reenter, &msg ))) {
debug( "authenticate() failed: %s\n", msg );
if (msg)
free( msg );
loginfailed( curuser, hostname, tty );
if (i == ENOENT || i == ESAD)
V_RET_AUTH;
else
V_RET_FAIL( 0 );
}
if (reenter) {
logError( "authenticate() requests more data: %s\n", msg );
free( msg );
V_RET_FAIL( 0 );
}
} else if (!strcmp( curtype, "generic" )) {
if (!gconv( GCONV_USER, 0 ))
return 0;
for (curret = 0;;) {
msg = NULL;
if ((i = authenticate( curuser, curret, &reenter, &msg ))) {
debug( "authenticate() failed: %s\n", msg );
if (msg)
free( msg );
loginfailed( curuser, hostname, tty );
if (i == ENOENT || i == ESAD)
V_RET_AUTH;
else
V_RET_FAIL( 0 );
}
if (curret)
free( curret );
if (!reenter)
break;
if (!(curret = gconv( GCONV_HIDDEN, msg )))
return 0;
free( msg );
}
} else {
logError( "Unsupported authentication type %\"s requested\n", curtype );
V_RET_FAIL( 0 );
}
if (msg) {
displayStr( V_MSG_INFO, msg );
free( msg );
}
done:
#else
if (strcmp( curtype, "classic" )) {
logError( "Unsupported authentication type %\"s requested\n", curtype );
V_RET_FAIL( 0 );
}
if (!gconv( GCONV_USER, 0 ))
return 0;
if (!(p = getpwnam( curuser ))) {
debug( "getpwnam() failed.\n" );
gconv( GCONV_PASS, 0 );
V_RET_AUTH;
}
if (p->pw_passwd[0] == '!' || p->pw_passwd[0] == '*') {
debug( "account is locked\n" );
gconv( GCONV_PASS, 0 );
V_RET_AUTH;
}
# ifdef USESHADOW
if ((sp = getspnam( curuser ))) {
p->pw_passwd = sp->sp_pwdp;
if (p->pw_passwd[0] == '!' || p->pw_passwd[0] == '*') {
debug( "account is locked\n" );
gconv( GCONV_PASS, 0 );
V_RET_AUTH;
}
} else
debug( "getspnam() failed: %m. Are you root?\n" );
# endif
if (!*p->pw_passwd) {
if (!td->allowNullPasswd) {
debug( "denying user with empty password\n" );
gconv( GCONV_PASS, 0 );
V_RET_AUTH;
}
goto nplogin;
}
if (isNoPassAllowed( curuser, p )) {
nplogin:
gconv( GCONV_PASS_ND, 0 );
if (!*curpass) {
debug( "accepting password-less login\n" );
goto done;
}
} else
if (!gconv( GCONV_PASS, 0 ))
return 0;
# ifdef KERBEROS
if (p->pw_uid) {
int ret;
char realm[REALM_SZ];
if (krb_get_lrealm( realm, 1 )) {
logError( "Cannot get KerberosIV realm.\n" );
V_RET_FAIL( 0 );
}
sprintf( krbtkfile, "%s.%.*s", TKT_ROOT, MAXPATHLEN - strlen( TKT_ROOT ) - 2, td->name );
krb_set_tkt_string( krbtkfile );
unlink( krbtkfile );
ret = krb_verify_user( curuser, "", realm, curpass, 1, "rcmd" );
if (ret == KSUCCESS) {
chown( krbtkfile, p->pw_uid, p->pw_gid );
debug( "KerberosIV verify succeeded\n" );
goto done;
} else if (ret != KDC_PR_UNKNOWN && ret != SKDC_CANT) {
logError( "KerberosIV verification failure %\"s for %s\n",
krb_get_err_text( ret ), curuser );
krbtkfile[0] = '\0';
V_RET_FAIL( 0 );
}
debug( "KerberosIV verify failed: %s\n", krb_get_err_text( ret ) );
}
krbtkfile[0] = '\0';
# endif /* KERBEROS */
# if defined(ultrix) || defined(__ultrix__)
if (authenticate_user( p, curpass, NULL ) < 0)
# elif defined(HAVE_PW_ENCRYPT)
if (strcmp( pw_encrypt( curpass, p->pw_passwd ), p->pw_passwd ))
# elif defined(HAVE_CRYPT)
if (strcmp( crypt( curpass, p->pw_passwd ), p->pw_passwd ))
# else
if (strcmp( curpass, p->pw_passwd ))
# endif
{
debug( "password verify failed\n" );
V_RET_AUTH;
}
done:
#endif /* !defined(USE_PAM) && !defined(_AIX) */
debug( "restrict %s ...\n", curuser );
#if defined(USE_PAM) || defined(_AIX)
if (!(p = getpwnam( curuser ))) {
logError( "getpwnam(%s) failed.\n", curuser );
V_RET_FAIL( 0 );
}
#endif
if (!p->pw_uid) {
if (!rootok && !td->allowRootLogin)
V_RET_FAIL( "Root logins are not allowed" );
return 1; /* don't deny root to log in */
}
#ifdef USE_PAM
debug( " pam_acct_mgmt() ...\n" );
pretc = pam_acct_mgmt( pamh, 0 );
reInitErrorLog();
debug( " pam_acct_mgmt() returned: %s\n", pam_strerror( pamh, pretc ) );
if (pretc == PAM_NEW_AUTHTOK_REQD) {
pdata.usecur = FALSE;
pdata.gconv = conv_interact;
/* pam will have output a message already, so no prepareErrorGreet() */
if (gconv != conv_interact || pnopass) {
pam_end( pamh, PAM_SUCCESS );
pamh = 0;
gSendInt( V_CHTOK_AUTH );
/* this cannot auth the wrong user, as only classic auths get here */
while (!doPAMAuth( PAMService, &pdata ))
if (pdata.abort)
return 0;
gSendInt( V_PRE_OK );
} else
gSendInt( V_CHTOK );
for (;;) {
debug( " pam_chauthtok() ...\n" );
pretc = pam_chauthtok( pamh, PAM_CHANGE_EXPIRED_AUTHTOK );
reInitErrorLog();
debug( " pam_chauthtok() returned: %s\n", pam_strerror( pamh, pretc ) );
if (pdata.abort) {
pam_end( pamh, PAM_SUCCESS );
pamh = 0;
return 0;
}
if (pretc == PAM_SUCCESS)
break;
/* effectively there is only PAM_AUTHTOK_ERR */
gSendInt( V_FAIL );
}
if (curpass)
free( curpass );
curpass = newpass;
newpass = 0;
} else if (pretc != PAM_SUCCESS) {
pam_end( pamh, pretc );
pamh = 0;
V_RET_AUTH;
}
#elif defined(_AIX) /* USE_PAM */
msg = NULL;
if (loginrestrictions( curuser,
((td->displayType & d_location) == dForeign) ? S_RLOGIN : S_LOGIN,
tty, &msg ) == -1)
{
debug( "loginrestrictions() - %s\n", msg ? msg : "error" );
loginfailed( curuser, hostname, tty );
prepareErrorGreet();
if (msg) {
displayStr( V_MSG_ERR, msg );
free( msg );
}
gSendInt( V_AUTH );
return 0;
}
if (msg)
free( (void *)msg );
#endif /* USE_PAM || _AIX */
#ifndef _AIX
# ifdef HAVE_SETUSERCONTEXT
# ifdef HAVE_LOGIN_GETCLASS
lc = login_getclass( p->pw_class );
# else
lc = login_getpwclass( p );
# endif
if (!lc)
V_RET_FAIL( 0 );
p->pw_shell = login_getcapstr( lc, "shell", p->pw_shell, p->pw_shell );
# endif
# ifndef USE_PAM
/* restrict_expired */
# if defined(HAVE_STRUCT_PASSWD_PW_EXPIRE) || defined(USESHADOW)
# if !defined(HAVE_STRUCT_PASSWD_PW_EXPIRE) || (!defined(HAVE_SETUSERCONTEXT) && defined(USESHADOW))
if (sp)
# endif
{
# define DEFAULT_WARN (2L * 7L) /* Two weeks */
tim = time( NULL ) / 86400L;
# ifdef HAVE_SETUSERCONTEXT
quietlog = login_getcapbool( lc, "hushlogin", 0 );
warntime = login_getcaptime( lc, "warnexpire",
DEFAULT_WARN * 86400L,
DEFAULT_WARN * 86400L ) / 86400L;
# else
quietlog = 0;
# ifdef USESHADOW
warntime = sp->sp_warn != -1 ? sp->sp_warn : DEFAULT_WARN;
# else
warntime = DEFAULT_WARN;
# endif
# endif
# ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE
if (p->pw_expire) {
expir = p->pw_expire / 86400L;
# else
if (sp->sp_expire != -1) {
expir = sp->sp_expire;
# endif
if (tim > expir) {
displayStr( V_MSG_ERR,
"Your account has expired;"
" please contact your system administrator" );
gSendInt( V_FAIL );
LC_RET0;
} else if (tim > (expir - warntime) && !quietlog) {
displayMsg( V_MSG_INFO,
"Warning: your account will expire in %d day(s)",
expir - tim );
}
}
# ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE
if (p->pw_change) {
expir = p->pw_change / 86400L;
# else
if (!sp->sp_lstchg) {
displayStr( V_MSG_ERR,
"You are required to change your password immediately"
" (root enforced)" );
/* XXX todo password change */
gSendInt( V_FAIL );
LC_RET0;
} else if (sp->sp_max != -1) {
expir = sp->sp_lstchg + sp->sp_max;
if (sp->sp_inact != -1 && tim > expir + sp->sp_inact) {
displayStr( V_MSG_ERR,
"Your account has expired;"
" please contact your system administrator" );
gSendInt( V_FAIL );
LC_RET0;
}
# endif
if (tim > expir) {
displayStr( V_MSG_ERR,
"You are required to change your password immediately"
" (password aged)" );
/* XXX todo password change */
gSendInt( V_FAIL );
LC_RET0;
} else if (tim > (expir - warntime) && !quietlog) {
displayMsg( V_MSG_INFO,
"Warning: your password will expire in %d day(s)",
expir - tim );
}
}
}
# endif /* HAVE_STRUCT_PASSWD_PW_EXPIRE || USESHADOW */
/* restrict_nologin */
# ifndef _PATH_NOLOGIN
# define _PATH_NOLOGIN "/etc/nologin"
# endif
if ((
# ifdef HAVE_SETUSERCONTEXT
/* Do we ignore a nologin file? */
!login_getcapbool( lc, "ignorenologin", 0 )) &&
(!stat( (nolg = login_getcapstr( lc, "nologin", "", NULL )), &st ) ||
# endif
!stat( (nolg = _PATH_NOLOGIN), &st )))
{
if (st.st_size && (fd = open( nolg, O_RDONLY )) >= 0) {
if ((buf = Malloc( st.st_size + 1 ))) {
if (read( fd, buf, st.st_size ) == st.st_size) {
close( fd );
buf[st.st_size] = 0;
displayStr( V_MSG_ERR, buf );
free( buf );
gSendInt( V_FAIL );
LC_RET0;
}
free( buf );
}
close( fd );
}
displayStr( V_MSG_ERR,
"Logins are not allowed at the moment.\nTry again later" );
gSendInt( V_FAIL );
LC_RET0;
}
/* restrict_time */
# if defined(HAVE_SETUSERCONTEXT) && defined(HAVE_AUTH_TIMEOK)
if (!auth_timeok( lc, time( NULL ) )) {
displayStr( V_MSG_ERR,
"You are not allowed to login at the moment" );
gSendInt( V_FAIL );
LC_RET0;
}
# endif
# ifdef HAVE_GETUSERSHELL
for (;;) {
if (!(s = getusershell())) {
debug( "shell not in /etc/shells\n" );
endusershell();
V_RET_FAIL( "Your login shell is not listed in /etc/shells" );
}
if (!strcmp( s, p->pw_shell )) {
endusershell();
break;
}
}
# endif
# endif /* !USE_PAM */
/* restrict_nohome */
# ifdef HAVE_SETUSERCONTEXT
if (login_getcapbool( lc, "requirehome", 0 )) {
struct stat st;
if (!*p->pw_dir || stat( p->pw_dir, &st ) || st.st_uid != p->pw_uid) {
displayStr( V_MSG_ERR, "Home folder not available" );
gSendInt( V_FAIL );
LC_RET0;
}
}
# endif
#endif /* !_AIX */
return 1;
}
static const char *envvars[] = {
"TZ", /* SYSV and SVR4, but never hurts */
#ifdef _AIX
"AUTHSTATE", /* for kerberos */
#endif
NULL
};
#if defined(USE_PAM) && defined(HAVE_INITGROUPS)
static int num_saved_gids;
static gid_t *saved_gids;
static int
saveGids( void )
{
num_saved_gids = getgroups( 0, 0 );
if (!(saved_gids = Malloc( sizeof(gid_t) * num_saved_gids )))
return 0;
if (getgroups( num_saved_gids, saved_gids ) < 0) {
logError( "saving groups failed: %m\n" );
return 0;
}
return 1;
}
static int
restoreGids( void )
{
if (setgroups( num_saved_gids, saved_gids ) < 0) {
logError( "restoring groups failed: %m\n" );
return 0;
}
if (setgid( p->pw_gid ) < 0) {
logError( "restoring gid failed: %m\n" );
return 0;
}
return 1;
}
#endif /* USE_PAM && HAVE_INITGROUPS */
static int
resetGids( void )
{
#ifdef HAVE_INITGROUPS
if (setgroups( 0, &p->pw_gid /* anything */ ) < 0) {
logError( "restoring groups failed: %m\n" );
return 0;
}
#endif
if (setgid( 0 ) < 0) {
logError( "restoring gid failed: %m\n" );
return 0;
}
return 1;
}
static int
setGid( const char *name, int gid )
{
if (setgid( gid ) < 0) {
logError( "setgid(%d) (user %s) failed: %m\n", gid, name );
return 0;
}
#ifdef HAVE_INITGROUPS
if (initgroups( name, gid ) < 0) {
logError( "initgroups for %s failed: %m\n", name );
setgid( 0 );
return 0;
}
#endif /* QNX4 doesn't support multi-groups, no initgroups() */
return 1;
}
static int
setUid( const char *name, int uid )
{
if (setuid( uid ) < 0) {
logError( "setuid(%d) (user %s) failed: %m\n", uid, name );
return 0;
}
return 1;
}
static int
setUser( const char *name, int uid, int gid )
{
if (setGid( name, gid )) {
if (setUid( name, uid ))
return 1;
resetGids();
}
return 0;
}
#if defined(SECURE_RPC) || defined(K5AUTH)
static void
nukeAuth( int len, const char *name )
{
int i;
for (i = 0; i < td->authNum; i++)
if (td->authorizations[i]->name_length == len &&
!memcmp( td->authorizations[i]->name, name, len ))
{
memcpy( &td->authorizations[i], &td->authorizations[i+1],
sizeof(td->authorizations[i]) * (--td->authNum - i) );
break;
}
}
#endif
static void
mergeSessionArgs( int cansave )
{
char *mfname;
const char *fname;
int i, needsave;
mfname = 0;
fname = ".dmrc";
if ((!curdmrc || newdmrc) && *dmrcDir)
if (strApp( &mfname, dmrcDir, "/", curuser, fname, (char *)0 ))
fname = mfname;
needsave = 0;
if (!curdmrc) {
curdmrc = iniLoad( fname );
if (!curdmrc) {
strDup( &curdmrc, "[Desktop]\nSession=default\n" );
needsave = 1;
}
}
if (newdmrc) {
curdmrc = iniMerge( curdmrc, newdmrc );
needsave = 1;
}
if (needsave && cansave)
if (!iniSave( curdmrc, fname ) && errno == ENOENT && mfname) {
for (i = 0; mfname[i]; i++)
if (mfname[i] == '/') {
mfname[i] = 0;
mkdir( mfname, 0755 );
mfname[i] = '/';
}
iniSave( curdmrc, mfname );
}
if (mfname)
free( mfname );
}
static int
createClientLog( const char *log )
{
char randstr[32], *randstrp = 0, *lname;
int lfd;
for (;;) {
struct expando macros[] = {
{ 'd', 0, td->name },
{ 'u', 0, curuser },
{ 'r', 0, randstrp },
{ 0, 0, 0 }
};
if (!(lname = expandMacros( log, macros )))
exit( 1 );
unlink( lname );
if ((lfd = open( lname, O_WRONLY|O_CREAT|O_EXCL, 0600 )) >= 0) {
dup2( lfd, 1 );
dup2( lfd, 2 );
close( lfd );
free( lname );
return TRUE;
}
if (errno != EEXIST || !macros[2].uses) {
free( lname );
return FALSE;
}
logInfo( "Session log file %s not usable, trying another one.\n",
lname );
free( lname );
sprintf( randstr, "%d", secureRandom() );
randstrp = randstr;
}
}
Boolean ssh_login_permitted(const char *user, SshUser uc)
{
char passwd[20]; /* Only for account lock check */
strncpy(passwd, uc->correct_encrypted_passwd, sizeof(passwd));
passwd[sizeof(passwd) - 1] = '\0';
#ifdef HAVE_USERSEC_H
{
char *expiration, current_time[100], normalized[100];
int rlogin_permitted;
ssh_time t;
struct SshCalendarTimeRec tm[1];
int account_is_locked;
if (setuserdb(S_READ) < 0)
{
if (getuid() == 0) /* It's OK to fail here if we are not root */
{
SSH_DEBUG(2, ("setuserdb S_READ failed: %.200s.",
strerror(errno)));
}
return FALSE;
}
if (getuserattr((char *)user, S_RLOGINCHK, &rlogin_permitted,
SEC_BOOL) < 0)
{
if (getuid() == 0) /* It's OK to fail here if we are not root */
{
SSH_DEBUG(2, ("getuserattr S_RLOGINCHK failed: %.200s",
strerror(errno)));
}
enduserdb();
return FALSE;
}
if (getuserattr((char *)user, S_EXPIRATION, &expiration, SEC_CHAR) < 0)
{
SSH_DEBUG(2, ("getuserattr S_EXPIRATION failed: %.200s.",
strerror(errno)));
enduserdb();
return FALSE;
}
#ifdef S_LOCKED
if (getuserattr(user, S_LOCKED, &account_is_locked, SEC_BOOL) < 0)
{
SSH_DEBUG(2, ("getuserattr S_LOCKED failed: %.200s.",
strerror(errno)));
enduserdb();
return FALSE;
}
if (account_is_locked)
{
SSH_DEBUG(2, ("Account %.100s is locked.", user));
enduserdb();
return FALSE;
}
#endif /* S_LOCKED */
if (!rlogin_permitted)
{
SSH_DEBUG(2, ("Remote logins to account %.100s not permitted by "
"user profile.",
user));
enduserdb();
return FALSE;
}
if (strcmp(expiration, "0") == 0)
{
/* The account does not expire - return success immediately. */
enduserdb();
return TRUE;
}
if (strlen(expiration) != 10)
{
SSH_DEBUG(2, ("Account %.100s expiration date is in wrong format.",
user));
enduserdb();
return FALSE;
}
t = ssh_time();
ssh_calendar_time(t, tm, TRUE);
snprintf(current_time, sizeof(current_time), "%04d%02d%02d%02d%02d",
tm->year, tm->month + 1, tm->monthday,
tm->hour, tm->minute);
if (expiration[8] < '7') /* Assume year < 70 is 20YY. */
strcpy(normalized, "20");
else
strcpy(normalized, "19");
strcat(normalized, expiration + 8);
strcat(normalized, expiration);
normalized[12] = '\0';
if (strcmp(normalized, current_time) < 0)
{
SSH_DEBUG(2, ("Account %.100s has expired - access denied.", user));
enduserdb();
return FALSE;
}
enduserdb();
}
#endif /* HAVE_USERSEC_H */
#ifdef HAVE_ETC_SHADOW
{
struct spwd *sp;
sp = (struct spwd *)getspnam(user);
#if defined(SECURE_RPC) && defined(NIS_PLUS)
if (geteuid() == UID_ROOT && ssh_user_uid(uc) != UID_ROOT
&& (!sp || !sp->sp_pwdp || !strcmp(sp->sp_pwdp,"*NP*")))
{
if (seteuid(ssh_user_uid(uc)) >= 0)
{
sp = getspnam(user); /* retry as user */
seteuid(UID_ROOT);
}
}
#endif /* SECURE_RPC && NIS_PLUS */
if (!sp)
{
/*
* Some systems, e.g.: IRIX, may or may not have /etc/shadow.
* Just check if there is one. If such system is also an YP
* client, then valid password might already be present in passwd
* structure. Just check if it's other than "x". Assume that
* YP server is always right if this is the case.
* [email protected]
*/
struct stat sbf;
if ((stat(SHADOW, &sbf) == 0) &&
strcmp(uc->correct_encrypted_passwd, "x") == 0)
{
SSH_DEBUG(2, ("Can't find %.100s's shadow - access denied.",
user));
endspent();
return FALSE;
}
}
else
{
SshTime today = ssh_time()/24/60/60; /* what a day! */
#ifdef HAVE_STRUCT_SPWD_EXPIRE
/* Check for expiration date */
if (sp->sp_expire > 0 && today > sp->sp_expire)
{
SSH_DEBUG(2, ("Account %.100s has expired - access denied.",
user));
endspent();
return FALSE;
}
#endif
#ifdef HAVE_STRUCT_SPWD_INACT
/* Check for last login */
if (sp->sp_inact > 0)
{
char buf[64];
SshTime llt;
llt = ssh_user_get_last_login_time(uc, buf, sizeof(buf));
if (llt && (today - llt/24/60/60) > sp->sp_inact)
{
SSH_DEBUG(2, ("Account %.100s was inactive for more than %d days.",
user, sp->sp_inact));
endspent();
return FALSE;
}
}
#endif
/* Check if password is valid */
if (sp->sp_lstchg == 0 ||
(sp->sp_max > 0 && today > sp->sp_lstchg + sp->sp_max))
{
SSH_DEBUG(2, ("Account %.100s's password is too old - forced to change.",
user));
uc->password_needs_change = TRUE;
}
strncpy(passwd, sp->sp_pwdp, sizeof(passwd));
passwd[sizeof(passwd) - 1] = '\0';
}
endspent();
}
#endif /* HAVE_ETC_SHADOW */
/*
* Check if account is locked. Check if encrypted password starts
* with "*LK*".
*/
{
if (strncmp(passwd,"*LK*", 4) == 0)
{
SSH_DEBUG(2, ("Account %.100s is locked.", user));
return FALSE;
}
}
#ifdef CHECK_ETC_SHELLS
{
int invalid = 1;
char *shell = pwd->pw_shell, *etc_shell, *getusershell();
if (!shell || !*shell)
shell = DEFAULT_SHELL;
while (invalid && (etc_shell = getusershell()))
invalid = strcmp(etc_shell, shell);
endusershell();
if (invalid)
{
SSH_DEBUG(2, ("Account %.100s doesn't have valid shell", user));
return FALSE;
}
}
#endif /* CHECK_ETC_SHELLS */
return TRUE;
}
