/* * Copyright (c) 1999, 2001, 2002 Todd C. Miller * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Sponsored in part by the Defense Advanced Research Projects * Agency (DARPA) and Air Force Research Laboratory, Air Force * Materiel Command, USAF, under agreement number F39502-99-1-0512. */ #include "config.h" #include #include #include #ifdef STDC_HEADERS # include # include #else # ifdef HAVE_STDLIB_H # include # endif #endif /* STDC_HEADERS */ #ifdef HAVE_STRING_H # include #else # ifdef HAVE_STRINGS_H # include # endif #endif /* HAVE_STRING_H */ #ifdef HAVE_UNISTD_H # include #endif /* HAVE_UNISTD_H */ #include #include #include "sudo.h" #include "sudo_auth.h" #ifndef lint static const char rcsid[] = "$Sudo: kerb4.c,v 1.11 2004/02/13 21:36:47 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) snprintf(tkfile, sizeof(tkfile), "%s/tkt%lu", _PATH_SUDO_TIMEDIR, (unsigned 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); }