735039dbdc
Implementation of gss_set_neg_mechs() and gss_get_neg_mechs() as defined in RFC 4178. New gss_release_cred_by_mech() API for dropping a credential from a mechanism glue credential.
332 lines
8.4 KiB
C
332 lines
8.4 KiB
C
/*
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* Copyright (c) 2004, 2018, PADL Software Pty Ltd.
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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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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 "spnego_locl.h"
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#include <gssapi_mech.h>
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OM_uint32 GSSAPI_CALLCONV
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_gss_spnego_release_cred(OM_uint32 *minor_status, gss_cred_id_t *cred_handle)
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{
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OM_uint32 ret;
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*minor_status = 0;
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if (cred_handle == NULL || *cred_handle == GSS_C_NO_CREDENTIAL)
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return GSS_S_COMPLETE;
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ret = gss_release_cred(minor_status, cred_handle);
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*cred_handle = GSS_C_NO_CREDENTIAL;
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return ret;
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}
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/*
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* For now, just a simple wrapper that avoids recursion. When
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* we support gss_{get,set}_neg_mechs() we will need to expose
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* more functionality.
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*/
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OM_uint32 GSSAPI_CALLCONV _gss_spnego_acquire_cred_from
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(OM_uint32 *minor_status,
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gss_const_name_t desired_name,
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OM_uint32 time_req,
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const gss_OID_set desired_mechs,
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gss_cred_usage_t cred_usage,
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gss_const_key_value_set_t cred_store,
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gss_cred_id_t * output_cred_handle,
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gss_OID_set * actual_mechs,
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OM_uint32 * time_rec
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)
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{
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const spnego_name dname = (const spnego_name)desired_name;
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gss_name_t name = GSS_C_NO_NAME;
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OM_uint32 ret, tmp;
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gss_OID_set_desc actual_desired_mechs;
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gss_OID_set mechs;
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size_t i, j;
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*output_cred_handle = GSS_C_NO_CREDENTIAL;
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if (dname) {
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ret = gss_import_name(minor_status, &dname->value, dname->type, &name);
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if (ret) {
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return ret;
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}
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}
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ret = gss_indicate_mechs(minor_status, &mechs);
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if (ret != GSS_S_COMPLETE) {
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gss_release_name(minor_status, &name);
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return ret;
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}
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/* Remove ourselves from this list */
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actual_desired_mechs.count = mechs->count;
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actual_desired_mechs.elements = malloc(actual_desired_mechs.count *
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sizeof(gss_OID_desc));
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if (actual_desired_mechs.elements == NULL) {
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*minor_status = ENOMEM;
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ret = GSS_S_FAILURE;
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goto out;
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}
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for (i = 0, j = 0; i < mechs->count; i++) {
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if (gss_oid_equal(&mechs->elements[i], GSS_SPNEGO_MECHANISM))
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continue;
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actual_desired_mechs.elements[j] = mechs->elements[i];
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j++;
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}
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actual_desired_mechs.count = j;
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ret = gss_acquire_cred_from(minor_status, name,
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time_req, &actual_desired_mechs,
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cred_usage, cred_store,
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output_cred_handle,
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actual_mechs, time_rec);
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if (ret != GSS_S_COMPLETE)
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goto out;
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out:
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gss_release_name(&tmp, &name);
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gss_release_oid_set(&tmp, &mechs);
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if (actual_desired_mechs.elements != NULL) {
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free(actual_desired_mechs.elements);
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}
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if (ret != GSS_S_COMPLETE) {
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_gss_spnego_release_cred(&tmp, output_cred_handle);
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}
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return ret;
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}
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OM_uint32 GSSAPI_CALLCONV _gss_spnego_inquire_cred
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(OM_uint32 * minor_status,
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gss_const_cred_id_t cred_handle,
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gss_name_t * name,
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OM_uint32 * lifetime,
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gss_cred_usage_t * cred_usage,
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gss_OID_set * mechanisms
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)
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{
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spnego_name sname = NULL;
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OM_uint32 ret;
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if (cred_handle == GSS_C_NO_CREDENTIAL) {
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*minor_status = 0;
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return GSS_S_NO_CRED;
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}
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if (name) {
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sname = calloc(1, sizeof(*sname));
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if (sname == NULL) {
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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}
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ret = gss_inquire_cred(minor_status,
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cred_handle,
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sname ? &sname->mech : NULL,
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lifetime,
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cred_usage,
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mechanisms);
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if (ret) {
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if (sname)
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free(sname);
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return ret;
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}
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if (name)
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*name = (gss_name_t)sname;
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return ret;
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}
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OM_uint32 GSSAPI_CALLCONV _gss_spnego_inquire_cred_by_mech (
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OM_uint32 * minor_status,
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gss_const_cred_id_t cred_handle,
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const gss_OID mech_type,
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gss_name_t * name,
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OM_uint32 * initiator_lifetime,
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OM_uint32 * acceptor_lifetime,
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gss_cred_usage_t * cred_usage
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)
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{
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spnego_name sname = NULL;
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OM_uint32 ret;
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if (cred_handle == GSS_C_NO_CREDENTIAL) {
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*minor_status = 0;
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return GSS_S_NO_CRED;
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}
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if (name) {
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sname = calloc(1, sizeof(*sname));
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if (sname == NULL) {
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*minor_status = ENOMEM;
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return GSS_S_FAILURE;
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}
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}
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ret = gss_inquire_cred_by_mech(minor_status,
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cred_handle,
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mech_type,
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sname ? &sname->mech : NULL,
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initiator_lifetime,
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acceptor_lifetime,
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cred_usage);
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if (ret) {
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if (sname)
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free(sname);
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return ret;
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}
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if (name)
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*name = (gss_name_t)sname;
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return GSS_S_COMPLETE;
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}
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OM_uint32 GSSAPI_CALLCONV _gss_spnego_inquire_cred_by_oid
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(OM_uint32 * minor_status,
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gss_const_cred_id_t cred_handle,
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const gss_OID desired_object,
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gss_buffer_set_t *data_set)
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{
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OM_uint32 ret;
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if (cred_handle == GSS_C_NO_CREDENTIAL) {
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*minor_status = 0;
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return GSS_S_NO_CRED;
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}
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ret = gss_inquire_cred_by_oid(minor_status,
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cred_handle,
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desired_object,
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data_set);
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return ret;
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}
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OM_uint32 GSSAPI_CALLCONV
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_gss_spnego_set_cred_option (OM_uint32 *minor_status,
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gss_cred_id_t *cred_handle,
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const gss_OID object,
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const gss_buffer_t value)
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{
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if (cred_handle == NULL || *cred_handle == GSS_C_NO_CREDENTIAL) {
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*minor_status = 0;
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return GSS_S_NO_CRED;
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}
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return gss_set_cred_option(minor_status,
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cred_handle,
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object,
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value);
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}
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OM_uint32 GSSAPI_CALLCONV
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_gss_spnego_export_cred (OM_uint32 *minor_status,
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gss_cred_id_t cred_handle,
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gss_buffer_t value)
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{
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return gss_export_cred(minor_status, cred_handle, value);
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}
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OM_uint32 GSSAPI_CALLCONV
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_gss_spnego_import_cred (OM_uint32 *minor_status,
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gss_buffer_t value,
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gss_cred_id_t *cred_handle)
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{
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return gss_import_cred(minor_status, value, cred_handle);
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}
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OM_uint32 GSSAPI_CALLCONV
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_gss_spnego_set_neg_mechs (OM_uint32 *minor_status,
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gss_cred_id_t cred_handle,
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const gss_OID_set mech_list)
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{
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OM_uint32 major, minor;
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gss_OID_set mechs = GSS_C_NO_OID_SET;
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size_t i;
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if (cred_handle != GSS_C_NO_CREDENTIAL) {
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major = gss_inquire_cred(minor_status, cred_handle,
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NULL, NULL, NULL, &mechs);
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if (GSS_ERROR(major))
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return major;
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for (i = 0; i < mechs->count; i++) {
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int present;
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major = gss_test_oid_set_member(minor_status,
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&mechs->elements[i],
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mech_list, &present);
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if (GSS_ERROR(major))
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break;
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if (!present) {
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major = gss_release_cred_by_mech(minor_status,
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cred_handle,
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&mechs->elements[i]);
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if (GSS_ERROR(major))
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break;
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}
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}
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/* for inner negotiation mechs, such as NegoEx */
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(void) gss_set_neg_mechs(&minor, cred_handle, mech_list);
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} else {
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/*
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* RFC 4178 says that GSS_Set_neg_mechs() on NULL credential sets
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* the negotiable mechs for the default credential, but neither
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* MIT nor Heimdal support this presently.
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*/
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major = GSS_S_NO_CRED;
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}
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gss_release_oid_set(&minor, &mechs);
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return major;
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}
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OM_uint32 GSSAPI_CALLCONV
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_gss_spnego_get_neg_mechs (OM_uint32 *minor_status,
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gss_const_cred_id_t cred_handle,
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gss_OID_set *mech_list)
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{
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return gss_inquire_cred(minor_status, cred_handle,
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NULL, NULL, NULL, mech_list);
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}
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