103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
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* Copyright (c) 1999-2005, 2007, 2010-2011
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* Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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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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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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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 "sudoers.h"
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#include "sudo_auth.h"
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int
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kerb4_init(struct passwd *pw, char **promptp, 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(struct passwd *pw, char *pass, 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%u",
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_PATH_SUDO_TIMEDIR, (unsigned int) 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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