| Current Path : /usr/src/crypto/heimdal/lib/auth/afskauthlib/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/crypto/heimdal/lib/auth/afskauthlib/verify.c |
/*
* Copyright (c) 1995-2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
RCSID("$Id: verify.c 14203 2004-09-08 09:02:59Z joda $");
#endif
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#ifdef KRB5
#include <krb5.h>
#endif
#ifdef KRB4
#include <krb.h>
#include <kafs.h>
#endif
#include <roken.h>
#ifdef KRB5
static char krb5ccname[128];
#endif
#ifdef KRB4
static char krbtkfile[128];
#endif
/*
In some cases is afs_gettktstring called twice (once before
afs_verify and once after afs_verify).
In some cases (rlogin with access allowed via .rhosts)
afs_verify is not called!
So we can't rely on correct value in krbtkfile in some
cases!
*/
static int correct_tkfilename=0;
static int pag_set=0;
#ifdef KRB4
static void
set_krbtkfile(uid_t uid)
{
snprintf (krbtkfile, sizeof(krbtkfile), "%s%d", TKT_ROOT, (unsigned)uid);
krb_set_tkt_string (krbtkfile);
correct_tkfilename = 1;
}
#endif
/* XXX this has to be the default cache name, since the KRB5CCNAME
* environment variable isn't exported by login/xdm
*/
#ifdef KRB5
static void
set_krb5ccname(uid_t uid)
{
snprintf (krb5ccname, sizeof(krb5ccname), "FILE:/tmp/krb5cc_%d", uid);
#ifdef KRB4
snprintf (krbtkfile, sizeof(krbtkfile), "%s%d", TKT_ROOT, (unsigned)uid);
#endif
correct_tkfilename = 1;
}
#endif
static void
set_spec_krbtkfile(void)
{
int fd;
#ifdef KRB4
snprintf (krbtkfile, sizeof(krbtkfile), "%s_XXXXXX", TKT_ROOT);
fd = mkstemp(krbtkfile);
close(fd);
unlink(krbtkfile);
krb_set_tkt_string (krbtkfile);
#endif
#ifdef KRB5
snprintf(krb5ccname, sizeof(krb5ccname),"FILE:/tmp/krb5cc_XXXXXX");
fd=mkstemp(krb5ccname+5);
close(fd);
unlink(krb5ccname+5);
#endif
}
#ifdef KRB5
static int
verify_krb5(struct passwd *pwd,
char *password,
int32_t *exp,
int quiet)
{
krb5_context context;
krb5_error_code ret;
krb5_ccache ccache;
krb5_principal principal;
ret = krb5_init_context(&context);
if (ret) {
syslog(LOG_AUTH|LOG_DEBUG, "krb5_init_context failed: %d", ret);
goto out;
}
ret = krb5_parse_name (context, pwd->pw_name, &principal);
if (ret) {
syslog(LOG_AUTH|LOG_DEBUG, "krb5_parse_name: %s",
krb5_get_err_text(context, ret));
goto out;
}
set_krb5ccname(pwd->pw_uid);
ret = krb5_cc_resolve(context, krb5ccname, &ccache);
if(ret) {
syslog(LOG_AUTH|LOG_DEBUG, "krb5_cc_resolve: %s",
krb5_get_err_text(context, ret));
goto out;
}
ret = krb5_verify_user_lrealm(context,
principal,
ccache,
password,
TRUE,
NULL);
if(ret) {
syslog(LOG_AUTH|LOG_DEBUG, "krb5_verify_user: %s",
krb5_get_err_text(context, ret));
goto out;
}
if(chown(krb5_cc_get_name(context, ccache), pwd->pw_uid, pwd->pw_gid)) {
syslog(LOG_AUTH|LOG_DEBUG, "chown: %s",
krb5_get_err_text(context, errno));
goto out;
}
#ifdef KRB4
{
krb5_realm realm = NULL;
krb5_boolean get_v4_tgt;
krb5_get_default_realm(context, &realm);
krb5_appdefault_boolean(context, "afskauthlib",
realm,
"krb4_get_tickets", FALSE, &get_v4_tgt);
if (get_v4_tgt) {
CREDENTIALS c;
krb5_creds mcred, cred;
krb5_cc_clear_mcred(&mcred);
krb5_make_principal(context, &mcred.server, realm,
"krbtgt",
realm,
NULL);
ret = krb5_cc_retrieve_cred(context, ccache, 0, &mcred, &cred);
if(ret == 0) {
ret = krb524_convert_creds_kdc_ccache(context, ccache, &cred, &c);
if(ret)
krb5_warn(context, ret, "converting creds");
else {
set_krbtkfile(pwd->pw_uid);
tf_setup(&c, c.pname, c.pinst);
}
memset(&c, 0, sizeof(c));
krb5_free_cred_contents(context, &cred);
} else
syslog(LOG_AUTH|LOG_DEBUG, "krb5_cc_retrieve_cred: %s",
krb5_get_err_text(context, ret));
krb5_free_principal(context, mcred.server);
}
free (realm);
if (!pag_set && k_hasafs()) {
k_setpag();
pag_set = 1;
}
if (pag_set)
krb5_afslog_uid_home(context, ccache, NULL, NULL,
pwd->pw_uid, pwd->pw_dir);
}
#endif
out:
if(ret && !quiet)
printf ("%s\n", krb5_get_err_text (context, ret));
return ret;
}
#endif
#ifdef KRB4
static int
verify_krb4(struct passwd *pwd,
char *password,
int32_t *exp,
int quiet)
{
int ret = 1;
char lrealm[REALM_SZ];
if (krb_get_lrealm (lrealm, 1) != KFAILURE) {
set_krbtkfile(pwd->pw_uid);
ret = krb_verify_user (pwd->pw_name, "", lrealm, password,
KRB_VERIFY_SECURE, NULL);
if (ret == KSUCCESS) {
if (!pag_set && k_hasafs()) {
k_setpag ();
pag_set = 1;
}
if (pag_set)
krb_afslog_uid_home (0, 0, pwd->pw_uid, pwd->pw_dir);
} else if (!quiet)
printf ("%s\n", krb_get_err_text (ret));
}
return ret;
}
#endif
int
afs_verify(char *name,
char *password,
int32_t *exp,
int quiet)
{
int ret = 1;
struct passwd *pwd = k_getpwnam (name);
if(pwd == NULL)
return 1;
if (!pag_set && k_hasafs()) {
k_setpag();
pag_set=1;
}
if (ret)
ret = unix_verify_user (name, password);
#ifdef KRB5
if (ret)
ret = verify_krb5(pwd, password, exp, quiet);
#endif
#ifdef KRB4
if(ret)
ret = verify_krb4(pwd, password, exp, quiet);
#endif
return ret;
}
char *
afs_gettktstring (void)
{
char *ptr;
struct passwd *pwd;
if (!correct_tkfilename) {
ptr = getenv("LOGNAME");
if (ptr != NULL && ((pwd = getpwnam(ptr)) != NULL)) {
set_krb5ccname(pwd->pw_uid);
#ifdef KRB4
set_krbtkfile(pwd->pw_uid);
if (!pag_set && k_hasafs()) {
k_setpag();
pag_set=1;
}
#endif
} else {
set_spec_krbtkfile();
}
}
#ifdef KRB5
esetenv("KRB5CCNAME",krb5ccname,1);
#endif
#ifdef KRB4
esetenv("KRBTKFILE",krbtkfile,1);
return krbtkfile;
#else
return "";
#endif
}