/* $NetBSD: creds.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */
/*
* Copyright (c) 2009 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 "gsskrb5_locl.h"
OM_uint32 GSSAPI_CALLCONV
_gsskrb5_export_cred(OM_uint32 *minor_status,
gss_cred_id_t cred_handle,
gss_buffer_t cred_token)
{
gsskrb5_cred handle = (gsskrb5_cred)cred_handle;
krb5_context context;
krb5_error_code ret;
krb5_storage *sp;
krb5_data data, mech;
const char *type;
char *str;
GSSAPI_KRB5_INIT (&context);
if (handle->usage != GSS_C_INITIATE && handle->usage != GSS_C_BOTH) {
*minor_status = GSS_KRB5_S_G_BAD_USAGE;
return GSS_S_FAILURE;
}
sp = krb5_storage_emem();
if (sp == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
type = krb5_cc_get_type(context, handle->ccache);
if (strcmp(type, "MEMORY") == 0) {
krb5_creds *creds;
krb5_data config_start_realm;
char *start_realm;
ret = krb5_store_uint32(sp, 0);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_cc_get_config(context, handle->ccache, NULL, "start_realm",
&config_start_realm);
if (ret == 0) {
start_realm = strndup(config_start_realm.data,
config_start_realm.length);
krb5_data_free(&config_start_realm);
} else {
start_realm = strdup(krb5_principal_get_realm(context,
handle->principal));
}
if (start_realm == NULL) {
*minor_status = krb5_enomem(context);
krb5_storage_free(sp);
return GSS_S_FAILURE;
}
ret = _krb5_get_krbtgt(context, handle->ccache, start_realm, &creds);
free(start_realm);
start_realm = NULL;
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_store_creds(sp, creds);
krb5_free_creds(context, creds);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
} else {
ret = krb5_store_uint32(sp, 1);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_cc_get_full_name(context, handle->ccache, &str);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_store_string(sp, str);
free(str);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
}
ret = krb5_storage_to_data(sp, &data);
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
sp = krb5_storage_emem();
if (sp == NULL) {
krb5_data_free(&data);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
mech.data = GSS_KRB5_MECHANISM->elements;
mech.length = GSS_KRB5_MECHANISM->length;
ret = krb5_store_data(sp, mech);
if (ret) {
krb5_data_free(&data);
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_store_data(sp, data);
krb5_data_free(&data);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_storage_to_data(sp, &data);
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
cred_token->value = data.data;
cred_token->length = data.length;
return GSS_S_COMPLETE;
}
OM_uint32 GSSAPI_CALLCONV
_gsskrb5_import_cred(OM_uint32 * minor_status,
gss_buffer_t cred_token,
gss_cred_id_t * cred_handle)
{
krb5_context context;
krb5_error_code ret;
gsskrb5_cred handle;
krb5_ccache id;
krb5_storage *sp;
char *str;
uint32_t type;
int flags = 0;
*cred_handle = GSS_C_NO_CREDENTIAL;
GSSAPI_KRB5_INIT (&context);
sp = krb5_storage_from_mem(cred_token->value, cred_token->length);
if (sp == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
ret = krb5_ret_uint32(sp, &type);
if (ret) {
krb5_storage_free(sp);
*minor_status = ret;
return GSS_S_FAILURE;
}
switch (type) {
case 0: {
krb5_creds creds;
ret = krb5_ret_creds(sp, &creds);
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_cc_new_unique(context, "MEMORY", NULL, &id);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_cc_initialize(context, id, creds.client);
if (ret) {
krb5_cc_destroy(context, id);
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_cc_store_cred(context, id, &creds);
krb5_free_cred_contents(context, &creds);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
flags |= GSS_CF_DESTROY_CRED_ON_RELEASE;
break;
}
case 1:
ret = krb5_ret_string(sp, &str);
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = krb5_cc_resolve(context, str, &id);
krb5_xfree(str);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
break;
default:
krb5_storage_free(sp);
*minor_status = 0;
return GSS_S_NO_CRED;
}
handle = calloc(1, sizeof(*handle));
if (handle == NULL) {
krb5_cc_close(context, id);
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
handle->usage = GSS_C_INITIATE;
krb5_cc_get_principal(context, id, &handle->principal);
handle->ccache = id;
handle->cred_flags = flags;
*cred_handle = (gss_cred_id_t)handle;
return GSS_S_COMPLETE;
}