/* * Copyright (c) 1999, 2001 Todd C. Miller <Todd.Miller@courtesan.com> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 4. Products derived from this software may not be called "Sudo" nor * may "Sudo" appear in their names without specific prior written * permission from the author. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #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 /* STDC_HEADERS */ #ifdef HAVE_STRING_H # include <string.h> #else # ifdef HAVE_STRINGS_H # include <strings.h> # endif #endif /* HAVE_STRING_H */ #ifdef HAVE_UNISTD_H # include <unistd.h> #endif /* HAVE_UNISTD_H */ #include <pwd.h> #include <krb.h> #include "sudo.h" #include "sudo_auth.h" #ifndef lint static const char rcsid[] = "$Sudo: kerb4.c,v 1.6 2001/12/14 19:52:53 millert Exp $"; #endif /* lint */ int kerb4_init(pw, promptp, auth) struct passwd *pw; char **promptp; sudo_auth *auth; { static char realm[REALM_SZ]; /* Don't try to verify root */ if (pw->pw_uid == 0) return(AUTH_FAILURE); /* Get the local realm, or retrun failure (no krb.conf) */ if (krb_get_lrealm(realm, 1) != KSUCCESS) return(AUTH_FAILURE); /* Stash a pointer to the realm (used in kerb4_verify) */ auth->data = (VOID *) realm; return(AUTH_SUCCESS); } int kerb4_verify(pw, pass, auth) struct passwd *pw; char *pass; sudo_auth *auth; { char tkfile[sizeof(_PATH_SUDO_TIMEDIR) + 4 + MAX_UID_T_LEN]; char *realm = (char *) auth->data; int error; /* * Set the ticket file to be in sudo sudo timedir so we don't * wipe out other (real) kerberos tickets. */ (void) sprintf(tkfile, "%s/tkt%ld", _PATH_SUDO_TIMEDIR, (long) pw->pw_uid); (void) krb_set_tkt_string(tkfile); /* Convert the password to a ticket given. */ error = krb_get_pw_in_tkt(pw->pw_name, "", realm, "krbtgt", realm, DEFAULT_TKT_LIFE, pass); switch (error) { case INTK_OK: dest_tkt(); /* we are done with the temp ticket */ return(AUTH_SUCCESS); break; case INTK_BADPW: case KDC_PR_UNKNOWN: break; default: (void) fprintf(stderr, "Warning: Kerberos error: %s\n", krb_err_txt[error]); } return(AUTH_FAILURE); }