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/*
Unix SMB/CIFS implementation.
Handle user credentials (as regards krb5)
Copyright (C) Jelmer Vernooij 2005
Copyright (C) Tim Potter 2001
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/kerberos.h"
#include "auth/kerberos/kerberos.h"
int cli_credentials_get_krb5_context(struct cli_credentials *cred,
struct smb_krb5_context **smb_krb5_context)
{
int ret;
if (cred->smb_krb5_context) {
*smb_krb5_context = cred->smb_krb5_context;
return 0;
}
ret = smb_krb5_init_context(cred, &cred->smb_krb5_context);
if (ret) {
return ret;
}
*smb_krb5_context = cred->smb_krb5_context;
return 0;
}
int cli_credentials_set_from_ccache(struct cli_credentials *cred,
enum credentials_obtained obtained)
{
krb5_principal princ;
krb5_error_code ret;
char *name;
char **realm;
ret = krb5_cc_get_principal(cred->ccache->smb_krb5_context->krb5_context,
cred->ccache->ccache, &princ);
if (ret) {
char *err_mess = smb_get_krb5_error_message(cred->ccache->smb_krb5_context->krb5_context, ret, cred);
DEBUG(1,("failed to get principal from ccache: %s\n",
err_mess));
talloc_free(err_mess);
return ret;
}
ret = krb5_unparse_name(cred->ccache->smb_krb5_context->krb5_context, princ, &name);
if (ret) {
char *err_mess = smb_get_krb5_error_message(cred->ccache->smb_krb5_context->krb5_context, ret, cred);
DEBUG(1,("failed to unparse principal from ccache: %s\n",
err_mess));
talloc_free(err_mess);
return ret;
}
realm = krb5_princ_realm(cred->ccache->smb_krb5_context->krb5_context, princ);
cli_credentials_set_principal(cred, name, obtained);
free(name);
krb5_free_principal(cred->ccache->smb_krb5_context->krb5_context, princ);
cred->ccache_obtained = obtained;
return 0;
}
static int free_mccache(void *ptr) {
struct ccache_container *ccc = ptr;
krb5_cc_destroy(ccc->smb_krb5_context->krb5_context, ccc->ccache);
return 0;
}
static int free_dccache(void *ptr) {
struct ccache_container *ccc = ptr;
krb5_cc_close(ccc->smb_krb5_context->krb5_context, ccc->ccache);
return 0;
}
int cli_credentials_set_ccache(struct cli_credentials *cred,
const char *name,
enum credentials_obtained obtained)
{
krb5_error_code ret;
krb5_principal princ;
struct ccache_container *ccc = talloc(cred, struct ccache_container);
if (!ccc) {
return ENOMEM;
}
ret = cli_credentials_get_krb5_context(cred, &ccc->smb_krb5_context);
if (ret) {
talloc_free(ccc);
return ret;
}
talloc_reference(ccc, ccc->smb_krb5_context);
if (name) {
ret = krb5_cc_resolve(ccc->smb_krb5_context->krb5_context, name, &ccc->ccache);
if (ret) {
DEBUG(1,("failed to read krb5 ccache: %s: %s\n",
name,
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccc);
return ret;
}
} else {
ret = krb5_cc_default(ccc->smb_krb5_context->krb5_context, &ccc->ccache);
if (ret) {
DEBUG(3,("failed to read default krb5 ccache: %s\n",
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccc);
return ret;
}
}
talloc_set_destructor(ccc, free_dccache);
ret = krb5_cc_get_principal(ccc->smb_krb5_context->krb5_context, ccc->ccache, &princ);
if (ret) {
DEBUG(3,("failed to get principal from default ccache: %s\n",
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccc);
return ret;
}
krb5_free_principal(ccc->smb_krb5_context->krb5_context, princ);
cred->ccache = ccc;
talloc_steal(cred, ccc);
ret = cli_credentials_set_from_ccache(cred, obtained);
if (ret) {
return ret;
}
return 0;
}
int cli_credentials_new_ccache(struct cli_credentials *cred)
{
krb5_error_code ret;
char *rand_string;
struct ccache_container *ccc = talloc(cred, struct ccache_container);
char *ccache_name;
if (!ccc) {
return ENOMEM;
}
rand_string = generate_random_str(NULL, 16);
if (!rand_string) {
talloc_free(ccc);
return ENOMEM;
}
ccache_name = talloc_asprintf(ccc, "MEMORY:%s",
rand_string);
talloc_free(rand_string);
if (!ccache_name) {
talloc_free(ccc);
return ENOMEM;
}
ret = cli_credentials_get_krb5_context(cred, &ccc->smb_krb5_context);
if (ret) {
talloc_free(ccc);
return ret;
}
talloc_reference(ccc, ccc->smb_krb5_context);
ret = krb5_cc_resolve(ccc->smb_krb5_context->krb5_context, ccache_name, &ccc->ccache);
if (ret) {
DEBUG(1,("failed to generate a new krb5 ccache (%s): %s\n",
ccache_name,
smb_get_krb5_error_message(ccc->smb_krb5_context->krb5_context, ret, ccc)));
talloc_free(ccache_name);
talloc_free(ccc);
return ret;
}
talloc_set_destructor(ccc, free_mccache);
cred->ccache = ccc;
talloc_steal(cred, ccc);
talloc_free(ccache_name);
return ret;
}
int cli_credentials_get_ccache(struct cli_credentials *cred,
struct ccache_container **ccc)
{
krb5_error_code ret;
if (cred->ccache_obtained >= (MAX(cred->principal_obtained,
cred->username_obtained))) {
*ccc = cred->ccache;
return 0;
}
if (cli_credentials_is_anonymous(cred)) {
return EINVAL;
}
ret = cli_credentials_new_ccache(cred);
if (ret) {
return ret;
}
ret = kinit_to_ccache(cred, cred, cred->ccache->smb_krb5_context, cred->ccache->ccache);
if (ret) {
return ret;
}
ret = cli_credentials_set_from_ccache(cred, cred->principal_obtained);
if (ret) {
return ret;
}
*ccc = cred->ccache;
return ret;
}
int cli_credentials_get_keytab(struct cli_credentials *cred,
struct keytab_container **_ktc)
{
krb5_error_code ret;
struct keytab_container *ktc;
struct smb_krb5_context *smb_krb5_context;
if (cred->keytab_obtained >= (MAX(cred->principal_obtained,
cred->username_obtained))) {
*_ktc = cred->keytab;
return 0;
}
if (cli_credentials_is_anonymous(cred)) {
return EINVAL;
}
ret = cli_credentials_get_krb5_context(cred, &smb_krb5_context);
if (ret) {
return ret;
}
ret = create_memory_keytab(cred, cred, smb_krb5_context, &ktc);
if (ret) {
return ret;
}
cred->keytab_obtained = (MAX(cred->principal_obtained,
cred->username_obtained));
cred->keytab = ktc;
*_ktc = cred->keytab;
return ret;
}
/**
* Set Kerberos KVNO
*/
void cli_credentials_set_kvno(struct cli_credentials *cred,
int kvno)
{
cred->kvno = kvno;
}
/**
* Return Kerberos KVNO
*/
int cli_credentials_get_kvno(struct cli_credentials *cred)
{
return cred->kvno;
}
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