| Current Path : /usr/src/crypto/heimdal/lib/auth/sia/ |
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/sia/sia.c |
/*
* Copyright (c) 1995-2001 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.
*/
#include "sia_locl.h"
RCSID("$Id: sia.c 14838 2005-04-19 04:41:07Z lha $");
int
siad_init(void)
{
return SIADSUCCESS;
}
int
siad_chk_invoker(void)
{
SIA_DEBUG(("DEBUG", "siad_chk_invoker"));
return SIADFAIL;
}
int
siad_ses_init(SIAENTITY *entity, int pkgind)
{
struct state *s = malloc(sizeof(*s));
SIA_DEBUG(("DEBUG", "siad_ses_init"));
if(s == NULL)
return SIADFAIL;
memset(s, 0, sizeof(*s));
#ifdef SIA_KRB5
{
krb5_error_code ret;
ret = krb5_init_context(&s->context);
if (ret)
return SIADFAIL;
}
#endif
entity->mech[pkgind] = (int*)s;
return SIADSUCCESS;
}
static int
setup_name(SIAENTITY *e, prompt_t *p)
{
SIA_DEBUG(("DEBUG", "setup_name"));
e->name = malloc(SIANAMEMIN + 1);
if(e->name == NULL){
SIA_DEBUG(("DEBUG", "failed to malloc %u bytes", SIANAMEMIN+1));
return SIADFAIL;
}
p->prompt = (unsigned char*)"login: ";
p->result = (unsigned char*)e->name;
p->min_result_length = 1;
p->max_result_length = SIANAMEMIN;
p->control_flags = 0;
return SIADSUCCESS;
}
static int
setup_password(SIAENTITY *e, prompt_t *p)
{
SIA_DEBUG(("DEBUG", "setup_password"));
e->password = malloc(SIAMXPASSWORD + 1);
if(e->password == NULL){
SIA_DEBUG(("DEBUG", "failed to malloc %u bytes", SIAMXPASSWORD+1));
return SIADFAIL;
}
p->prompt = (unsigned char*)"Password: ";
p->result = (unsigned char*)e->password;
p->min_result_length = 0;
p->max_result_length = SIAMXPASSWORD;
p->control_flags = SIARESINVIS;
return SIADSUCCESS;
}
static int
doauth(SIAENTITY *entity, int pkgind, char *name)
{
struct passwd pw, *pwd;
char pwbuf[1024];
struct state *s = (struct state*)entity->mech[pkgind];
#ifdef SIA_KRB5
krb5_realm *realms, *r;
krb5_principal principal;
krb5_ccache ccache;
krb5_error_code ret;
#endif
#ifdef SIA_KRB4
char realm[REALM_SZ];
char *toname, *toinst;
int ret;
struct passwd fpw, *fpwd;
char fpwbuf[1024];
int secure;
#endif
if(getpwnam_r(name, &pw, pwbuf, sizeof(pwbuf), &pwd) != 0 || pwd == NULL){
SIA_DEBUG(("DEBUG", "failed to getpwnam(%s)", name));
return SIADFAIL;
}
#ifdef SIA_KRB5
ret = krb5_get_default_realms(s->context, &realms);
for (r = realms; *r != NULL; ++r) {
krb5_make_principal (s->context, &principal, *r, entity->name, NULL);
if(krb5_kuserok(s->context, principal, entity->name))
break;
}
krb5_free_host_realm (s->context, realms);
if (*r == NULL)
return SIADFAIL;
sprintf(s->ticket, "FILE:/tmp/krb5_cc%d_%d", pwd->pw_uid, getpid());
ret = krb5_cc_resolve(s->context, s->ticket, &ccache);
if(ret)
return SIADFAIL;
#endif
#ifdef SIA_KRB4
snprintf(s->ticket, sizeof(s->ticket),
"%s%u_%u", TKT_ROOT, (unsigned)pwd->pw_uid, (unsigned)getpid());
krb_get_lrealm(realm, 1);
toname = name;
toinst = "";
if(entity->authtype == SIA_A_SUAUTH){
uid_t ouid;
#ifdef HAVE_SIAENTITY_OUID
ouid = entity->ouid;
#else
ouid = getuid();
#endif
if(getpwuid_r(ouid, &fpw, fpwbuf, sizeof(fpwbuf), &fpwd) != 0 || fpwd == NULL){
SIA_DEBUG(("DEBUG", "failed to getpwuid(%u)", ouid));
return SIADFAIL;
}
snprintf(s->ticket, sizeof(s->ticket), "%s_%s_to_%s_%d",
TKT_ROOT, fpwd->pw_name, pwd->pw_name, getpid());
if(strcmp(pwd->pw_name, "root") == 0){
toname = fpwd->pw_name;
toinst = pwd->pw_name;
}
}
if(entity->authtype == SIA_A_REAUTH)
snprintf(s->ticket, sizeof(s->ticket), "%s", tkt_string());
krb_set_tkt_string(s->ticket);
setuid(0); /* XXX fix for fix in tf_util.c */
if(krb_kuserok(toname, toinst, realm, name)){
SIA_DEBUG(("DEBUG", "%s.%s@%s is not allowed to login as %s",
toname, toinst, realm, name));
return SIADFAIL;
}
#endif
#ifdef SIA_KRB5
ret = krb5_verify_user_lrealm(s->context, principal, ccache,
entity->password, 1, NULL);
if(ret){
/* if this is most likely a local user (such as
root), just silently return failure when the
principal doesn't exist */
if(ret != KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN &&
ret != KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN)
SIALOG("WARNING", "krb5_verify_user(%s): %s",
entity->name, error_message(ret));
return SIADFAIL;
}
#endif
#ifdef SIA_KRB4
if (getuid () == 0)
secure = KRB_VERIFY_SECURE;
else
secure = KRB_VERIFY_NOT_SECURE;
ret = krb_verify_user(toname, toinst, realm,
entity->password, secure, NULL);
if(ret){
SIA_DEBUG(("DEBUG", "krb_verify_user: %s", krb_get_err_text(ret)));
if(ret != KDC_PR_UNKNOWN)
/* since this is most likely a local user (such as
root), just silently return failure when the
principal doesn't exist */
SIALOG("WARNING", "krb_verify_user(%s.%s): %s",
toname, toinst, krb_get_err_text(ret));
return SIADFAIL;
}
#endif
if(sia_make_entity_pwd(pwd, entity) == SIAFAIL)
return SIADFAIL;
s->valid = 1;
return SIADSUCCESS;
}
static int
common_auth(sia_collect_func_t *collect,
SIAENTITY *entity,
int siastat,
int pkgind)
{
prompt_t prompts[2], *pr;
char *name;
SIA_DEBUG(("DEBUG", "common_auth"));
if((siastat == SIADSUCCESS) && (geteuid() == 0))
return SIADSUCCESS;
if(entity == NULL) {
SIA_DEBUG(("DEBUG", "entity == NULL"));
return SIADFAIL | SIADSTOP;
}
name = entity->name;
if(entity->acctname)
name = entity->acctname;
if((collect != NULL) && entity->colinput) {
int num;
pr = prompts;
if(name == NULL){
if(setup_name(entity, pr) != SIADSUCCESS)
return SIADFAIL;
pr++;
}
if(entity->password == NULL){
if(setup_password(entity, pr) != SIADSUCCESS)
return SIADFAIL;
pr++;
}
num = pr - prompts;
if(num == 1){
if((*collect)(240, SIAONELINER, (unsigned char*)"", num,
prompts) != SIACOLSUCCESS){
SIA_DEBUG(("DEBUG", "collect failed"));
return SIADFAIL | SIADSTOP;
}
} else if(num > 0){
if((*collect)(0, SIAFORM, (unsigned char*)"", num,
prompts) != SIACOLSUCCESS){
SIA_DEBUG(("DEBUG", "collect failed"));
return SIADFAIL | SIADSTOP;
}
}
}
if(name == NULL)
name = entity->name;
if(name == NULL || name[0] == '\0'){
SIA_DEBUG(("DEBUG", "name is null"));
return SIADFAIL;
}
if(entity->password == NULL || strlen(entity->password) > SIAMXPASSWORD){
SIA_DEBUG(("DEBUG", "entity->password is null"));
return SIADFAIL;
}
return doauth(entity, pkgind, name);
}
int
siad_ses_authent(sia_collect_func_t *collect,
SIAENTITY *entity,
int siastat,
int pkgind)
{
SIA_DEBUG(("DEBUG", "siad_ses_authent"));
return common_auth(collect, entity, siastat, pkgind);
}
int
siad_ses_estab(sia_collect_func_t *collect,
SIAENTITY *entity, int pkgind)
{
SIA_DEBUG(("DEBUG", "siad_ses_estab"));
return SIADFAIL;
}
int
siad_ses_launch(sia_collect_func_t *collect,
SIAENTITY *entity,
int pkgind)
{
static char env[MaxPathLen];
struct state *s = (struct state*)entity->mech[pkgind];
SIA_DEBUG(("DEBUG", "siad_ses_launch"));
if(s->valid){
#ifdef SIA_KRB5
chown(s->ticket + sizeof("FILE:") - 1,
entity->pwd->pw_uid,
entity->pwd->pw_gid);
snprintf(env, sizeof(env), "KRB5CCNAME=%s", s->ticket);
#endif
#ifdef SIA_KRB4
chown(s->ticket, entity->pwd->pw_uid, entity->pwd->pw_gid);
snprintf(env, sizeof(env), "KRBTKFILE=%s", s->ticket);
#endif
putenv(env);
}
#ifdef SIA_KRB5
if (k_hasafs()) {
char cell[64];
krb5_ccache ccache;
if(krb5_cc_resolve(s->context, s->ticket, &ccache) == 0) {
k_setpag();
if(k_afs_cell_of_file(entity->pwd->pw_dir, cell, sizeof(cell)) == 0)
krb5_afslog(s->context, ccache, cell, 0);
krb5_afslog_home(s->context, ccache, 0, 0, entity->pwd->pw_dir);
}
}
#endif
#ifdef SIA_KRB4
if (k_hasafs()) {
char cell[64];
k_setpag();
if(k_afs_cell_of_file(entity->pwd->pw_dir, cell, sizeof(cell)) == 0)
krb_afslog(cell, 0);
krb_afslog_home(0, 0, entity->pwd->pw_dir);
}
#endif
return SIADSUCCESS;
}
int
siad_ses_release(SIAENTITY *entity, int pkgind)
{
SIA_DEBUG(("DEBUG", "siad_ses_release"));
if(entity->mech[pkgind]){
#ifdef SIA_KRB5
struct state *s = (struct state*)entity->mech[pkgind];
krb5_free_context(s->context);
#endif
free(entity->mech[pkgind]);
}
return SIADSUCCESS;
}
int
siad_ses_suauthent(sia_collect_func_t *collect,
SIAENTITY *entity,
int siastat,
int pkgind)
{
SIA_DEBUG(("DEBUG", "siad_ses_suauth"));
if(geteuid() != 0)
return SIADFAIL;
if(entity->name == NULL)
return SIADFAIL;
if(entity->name[0] == '\0') {
free(entity->name);
entity->name = strdup("root");
if (entity->name == NULL)
return SIADFAIL;
}
return common_auth(collect, entity, siastat, pkgind);
}
int
siad_ses_reauthent (sia_collect_func_t *collect,
SIAENTITY *entity,
int siastat,
int pkgind)
{
int ret;
SIA_DEBUG(("DEBUG", "siad_ses_reauthent"));
if(entity == NULL || entity->name == NULL)
return SIADFAIL;
ret = common_auth(collect, entity, siastat, pkgind);
if((ret & SIADSUCCESS)){
/* launch isn't (always?) called when doing reauth, so we must
duplicate some code here... */
struct state *s = (struct state*)entity->mech[pkgind];
chown(s->ticket, entity->pwd->pw_uid, entity->pwd->pw_gid);
#ifdef SIA_KRB5
if (k_hasafs()) {
char cell[64];
krb5_ccache ccache;
if(krb5_cc_resolve(s->context, s->ticket, &ccache) == 0) {
k_setpag();
if(k_afs_cell_of_file(entity->pwd->pw_dir,
cell, sizeof(cell)) == 0)
krb5_afslog(s->context, ccache, cell, 0);
krb5_afslog_home(s->context, ccache, 0, 0, entity->pwd->pw_dir);
}
}
#endif
#ifdef SIA_KRB4
if(k_hasafs()) {
char cell[64];
if(k_afs_cell_of_file(entity->pwd->pw_dir,
cell, sizeof(cell)) == 0)
krb_afslog(cell, 0);
krb_afslog_home(0, 0, entity->pwd->pw_dir);
}
#endif
}
return ret;
}
int
siad_chg_finger (sia_collect_func_t *collect,
const char *username,
int argc,
char *argv[])
{
SIA_DEBUG(("DEBUG", "siad_chg_finger"));
return SIADFAIL;
}
#ifdef SIA_KRB5
int
siad_chg_password (sia_collect_func_t *collect,
const char *username,
int argc,
char *argv[])
{
return SIADFAIL;
}
#endif
#ifdef SIA_KRB4
static void
sia_message(sia_collect_func_t *collect, int rendition,
const char *title, const char *message)
{
prompt_t prompt;
prompt.prompt = (unsigned char*)message;
(*collect)(0, rendition, (unsigned char*)title, 1, &prompt);
}
static int
init_change(sia_collect_func_t *collect, krb_principal *princ)
{
prompt_t prompt;
char old_pw[MAX_KPW_LEN+1];
char *msg;
char tktstring[128];
int ret;
SIA_DEBUG(("DEBUG", "init_change"));
prompt.prompt = (unsigned char*)"Old password: ";
prompt.result = (unsigned char*)old_pw;
prompt.min_result_length = 0;
prompt.max_result_length = sizeof(old_pw) - 1;
prompt.control_flags = SIARESINVIS;
asprintf(&msg, "Changing password for %s", krb_unparse_name(princ));
if(msg == NULL){
SIA_DEBUG(("DEBUG", "out of memory"));
return SIADFAIL;
}
ret = (*collect)(60, SIAONELINER, (unsigned char*)msg, 1, &prompt);
free(msg);
SIA_DEBUG(("DEBUG", "ret = %d", ret));
if(ret != SIACOLSUCCESS)
return SIADFAIL;
snprintf(tktstring, sizeof(tktstring),
"%s_cpw_%u", TKT_ROOT, (unsigned)getpid());
krb_set_tkt_string(tktstring);
ret = krb_get_pw_in_tkt(princ->name, princ->instance, princ->realm,
PWSERV_NAME, KADM_SINST, 1, old_pw);
if (ret != KSUCCESS) {
SIA_DEBUG(("DEBUG", "krb_get_pw_in_tkt: %s", krb_get_err_text(ret)));
if (ret == INTK_BADPW)
sia_message(collect, SIAWARNING, "", "Incorrect old password.");
else
sia_message(collect, SIAWARNING, "", "Kerberos error.");
memset(old_pw, 0, sizeof(old_pw));
return SIADFAIL;
}
if(chown(tktstring, getuid(), -1) < 0){
dest_tkt();
return SIADFAIL;
}
memset(old_pw, 0, sizeof(old_pw));
return SIADSUCCESS;
}
int
siad_chg_password (sia_collect_func_t *collect,
const char *username,
int argc,
char *argv[])
{
prompt_t prompts[2];
krb_principal princ;
int ret;
char new_pw1[MAX_KPW_LEN+1];
char new_pw2[MAX_KPW_LEN+1];
static struct et_list *et_list;
setprogname(argv[0]);
SIA_DEBUG(("DEBUG", "siad_chg_password"));
if(collect == NULL)
return SIADFAIL;
if(username == NULL)
username = getlogin();
ret = krb_parse_name(username, &princ);
if(ret)
return SIADFAIL;
if(princ.realm[0] == '\0')
krb_get_lrealm(princ.realm, 1);
if(et_list == NULL) {
initialize_kadm_error_table_r(&et_list);
initialize_krb_error_table_r(&et_list);
}
ret = init_change(collect, &princ);
if(ret != SIADSUCCESS)
return ret;
again:
prompts[0].prompt = (unsigned char*)"New password: ";
prompts[0].result = (unsigned char*)new_pw1;
prompts[0].min_result_length = MIN_KPW_LEN;
prompts[0].max_result_length = sizeof(new_pw1) - 1;
prompts[0].control_flags = SIARESINVIS;
prompts[1].prompt = (unsigned char*)"Verify new password: ";
prompts[1].result = (unsigned char*)new_pw2;
prompts[1].min_result_length = MIN_KPW_LEN;
prompts[1].max_result_length = sizeof(new_pw2) - 1;
prompts[1].control_flags = SIARESINVIS;
if((*collect)(120, SIAFORM, (unsigned char*)"", 2, prompts) !=
SIACOLSUCCESS) {
dest_tkt();
return SIADFAIL;
}
if(strcmp(new_pw1, new_pw2) != 0){
sia_message(collect, SIAWARNING, "", "Password mismatch.");
goto again;
}
ret = kadm_check_pw(new_pw1);
if(ret) {
sia_message(collect, SIAWARNING, "", com_right(et_list, ret));
goto again;
}
memset(new_pw2, 0, sizeof(new_pw2));
ret = kadm_init_link (PWSERV_NAME, KRB_MASTER, princ.realm);
if (ret != KADM_SUCCESS)
sia_message(collect, SIAWARNING, "Error initing kadmin connection",
com_right(et_list, ret));
else {
des_cblock newkey;
char *pw_msg; /* message from server */
des_string_to_key(new_pw1, &newkey);
ret = kadm_change_pw_plain((unsigned char*)&newkey, new_pw1, &pw_msg);
memset(newkey, 0, sizeof(newkey));
if (ret == KADM_INSECURE_PW)
sia_message(collect, SIAWARNING, "Insecure password", pw_msg);
else if (ret != KADM_SUCCESS)
sia_message(collect, SIAWARNING, "Error changing password",
com_right(et_list, ret));
}
memset(new_pw1, 0, sizeof(new_pw1));
if (ret != KADM_SUCCESS)
sia_message(collect, SIAWARNING, "", "Password NOT changed.");
else
sia_message(collect, SIAINFO, "", "Password changed.");
dest_tkt();
if(ret)
return SIADFAIL;
return SIADSUCCESS;
}
#endif
int
siad_chg_shell (sia_collect_func_t *collect,
const char *username,
int argc,
char *argv[])
{
return SIADFAIL;
}
int
siad_getpwent(struct passwd *result,
char *buf,
int bufsize,
struct sia_context *context)
{
return SIADFAIL;
}
int
siad_getpwuid (uid_t uid,
struct passwd *result,
char *buf,
int bufsize,
struct sia_context *context)
{
return SIADFAIL;
}
int
siad_getpwnam (const char *name,
struct passwd *result,
char *buf,
int bufsize,
struct sia_context *context)
{
return SIADFAIL;
}
int
siad_setpwent (struct sia_context *context)
{
return SIADFAIL;
}
int
siad_endpwent (struct sia_context *context)
{
return SIADFAIL;
}
int
siad_getgrent(struct group *result,
char *buf,
int bufsize,
struct sia_context *context)
{
return SIADFAIL;
}
int
siad_getgrgid (gid_t gid,
struct group *result,
char *buf,
int bufsize,
struct sia_context *context)
{
return SIADFAIL;
}
int
siad_getgrnam (const char *name,
struct group *result,
char *buf,
int bufsize,
struct sia_context *context)
{
return SIADFAIL;
}
int
siad_setgrent (struct sia_context *context)
{
return SIADFAIL;
}
int
siad_endgrent (struct sia_context *context)
{
return SIADFAIL;
}
int
siad_chk_user (const char *logname, int checkflag)
{
if(checkflag != CHGPASSWD)
return SIADFAIL;
return SIADSUCCESS;
}