131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*
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* Copyright (c) 1999, 2001, 2002 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* 4. Products derived from this software may not be called "Sudo" nor
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* may "Sudo" appear in their names without specific prior written
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* permission from the author.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <pwd.h>
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#include <krb.h>
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#include "sudo.h"
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#include "sudo_auth.h"
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#ifndef lint
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static const char rcsid[] = "$Sudo$";
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#endif /* lint */
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int
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kerb4_init(pw, promptp, auth)
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struct passwd *pw;
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char **promptp;
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sudo_auth *auth;
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{
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static char realm[REALM_SZ];
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/* Don't try to verify root */
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if (pw->pw_uid == 0)
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return(AUTH_FAILURE);
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/* Get the local realm, or retrun failure (no krb.conf) */
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if (krb_get_lrealm(realm, 1) != KSUCCESS)
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return(AUTH_FAILURE);
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/* Stash a pointer to the realm (used in kerb4_verify) */
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auth->data = (VOID *) realm;
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return(AUTH_SUCCESS);
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}
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int
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kerb4_verify(pw, pass, auth)
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struct passwd *pw;
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char *pass;
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sudo_auth *auth;
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{
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char tkfile[sizeof(_PATH_SUDO_TIMEDIR) + 4 + MAX_UID_T_LEN];
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char *realm = (char *) auth->data;
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int error;
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/*
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* Set the ticket file to be in sudo sudo timedir so we don't
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* wipe out other (real) kerberos tickets.
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*/
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(void) snprintf(tkfile, sizeof(tkfile), "%s/tkt%lu",
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_PATH_SUDO_TIMEDIR, (unsigned long) pw->pw_uid);
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(void) krb_set_tkt_string(tkfile);
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/* Convert the password to a ticket given. */
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error = krb_get_pw_in_tkt(pw->pw_name, "", realm, "krbtgt", realm,
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DEFAULT_TKT_LIFE, pass);
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switch (error) {
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case INTK_OK:
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dest_tkt(); /* we are done with the temp ticket */
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return(AUTH_SUCCESS);
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break;
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case INTK_BADPW:
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case KDC_PR_UNKNOWN:
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break;
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default:
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(void) fprintf(stderr, "Warning: Kerberos error: %s\n",
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krb_err_txt[error]);
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}
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return(AUTH_FAILURE);
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}
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