256 lines
6.1 KiB
C
256 lines
6.1 KiB
C
/*
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* Copyright (c) 2009 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "gsskrb5_locl.h"
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OM_uint32
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_gsskrb5_export_cred(OM_uint32 *minor_status,
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gss_cred_id_t cred_handle,
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gss_buffer_t cred_token)
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{
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gsskrb5_cred handle = (gsskrb5_cred)cred_handle;
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krb5_context context;
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krb5_error_code ret;
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krb5_storage *sp;
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krb5_data data, mech;
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const char *type;
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char *str;
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GSSAPI_KRB5_INIT (&context);
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if (handle->usage != GSS_C_INITIATE && handle->usage != GSS_C_BOTH) {
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*minor_status = GSS_KRB5_S_G_BAD_USAGE;
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return GSS_S_FAILURE;
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}
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sp = krb5_storage_emem();
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if (sp == NULL) {
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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type = krb5_cc_get_type(context, handle->ccache);
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if (strcmp(type, "MEMORY") == 0) {
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krb5_creds *creds;
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ret = krb5_store_uint32(sp, 0);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = _krb5_get_krbtgt(context, handle->ccache,
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handle->principal->realm,
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&creds);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_store_creds(sp, creds);
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krb5_free_creds(context, creds);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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} else {
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ret = krb5_store_uint32(sp, 1);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_cc_get_full_name(context, handle->ccache, &str);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_store_string(sp, str);
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free(str);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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}
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ret = krb5_storage_to_data(sp, &data);
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krb5_storage_free(sp);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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sp = krb5_storage_emem();
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if (sp == NULL) {
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krb5_data_free(&data);
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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mech.data = GSS_KRB5_MECHANISM->elements;
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mech.length = GSS_KRB5_MECHANISM->length;
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ret = krb5_store_data(sp, mech);
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if (ret) {
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krb5_data_free(&data);
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_store_data(sp, data);
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krb5_data_free(&data);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_storage_to_data(sp, &data);
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krb5_storage_free(sp);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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cred_token->value = data.data;
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cred_token->length = data.length;
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return GSS_S_COMPLETE;
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}
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OM_uint32
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_gsskrb5_import_cred(OM_uint32 * minor_status,
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gss_buffer_t cred_token,
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gss_cred_id_t * cred_handle)
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{
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krb5_context context;
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krb5_error_code ret;
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gsskrb5_cred handle;
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krb5_ccache id;
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krb5_storage *sp;
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char *str;
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uint32_t type;
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int flags = 0;
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*cred_handle = GSS_C_NO_CREDENTIAL;
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GSSAPI_KRB5_INIT (&context);
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sp = krb5_storage_from_mem(cred_token->value, cred_token->length);
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if (sp == NULL) {
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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ret = krb5_ret_uint32(sp, &type);
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if (ret) {
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krb5_storage_free(sp);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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switch (type) {
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case 0: {
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krb5_creds creds;
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ret = krb5_ret_creds(sp, &creds);
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krb5_storage_free(sp);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_cc_new_unique(context, "MEMORY", NULL, &id);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_cc_initialize(context, id, creds.client);
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if (ret) {
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krb5_cc_destroy(context, id);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_cc_store_cred(context, id, &creds);
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krb5_free_cred_contents(context, &creds);
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flags |= GSS_CF_DESTROY_CRED_ON_RELEASE;
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break;
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}
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case 1:
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ret = krb5_ret_string(sp, &str);
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krb5_storage_free(sp);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_cc_resolve(context, str, &id);
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krb5_xfree(str);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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break;
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default:
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krb5_storage_free(sp);
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*minor_status = 0;
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return GSS_S_NO_CRED;
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}
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handle = calloc(1, sizeof(*handle));
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if (handle == NULL) {
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krb5_cc_close(context, id);
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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handle->usage = GSS_C_INITIATE;
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krb5_cc_get_principal(context, id, &handle->principal);
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handle->ccache = id;
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handle->cred_flags = flags;
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*cred_handle = (gss_cred_id_t)handle;
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return GSS_S_COMPLETE;
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}
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