/* $NetBSD: add_cred.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */
/*
* Copyright (c) 2003 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_add_cred (
OM_uint32 *minor_status,
gss_const_cred_id_t input_cred_handle,
gss_const_name_t desired_name,
const gss_OID desired_mech,
gss_cred_usage_t cred_usage,
OM_uint32 initiator_time_req,
OM_uint32 acceptor_time_req,
gss_cred_id_t *output_cred_handle,
gss_OID_set *actual_mechs,
OM_uint32 *initiator_time_rec,
OM_uint32 *acceptor_time_rec)
{
krb5_context context;
OM_uint32 major, lifetime;
gsskrb5_cred cred, handle;
krb5_const_principal dname;
handle = NULL;
cred = (gsskrb5_cred)input_cred_handle;
dname = (krb5_const_principal)desired_name;
if (cred == NULL && output_cred_handle == NULL) {
*minor_status = EINVAL;
return GSS_S_CALL_INACCESSIBLE_WRITE;
}
GSSAPI_KRB5_INIT (&context);
if (desired_mech != GSS_C_NO_OID &&
gss_oid_equal(desired_mech, GSS_KRB5_MECHANISM) == 0) {
*minor_status = 0;
return GSS_S_BAD_MECH;
}
if (cred == NULL) {
/*
* Acquire a credential; output_cred_handle can't be NULL, see above.
*/
heim_assert(output_cred_handle != NULL,
"internal error in _gsskrb5_add_cred()");
major = _gsskrb5_acquire_cred(minor_status, desired_name,
min(initiator_time_req,
acceptor_time_req),
GSS_C_NO_OID_SET,
cred_usage,
output_cred_handle,
actual_mechs, &lifetime);
if (major != GSS_S_COMPLETE)
goto failure;
} else {
/*
* Check that we're done or copy input to output if
* output_cred_handle != NULL.
*/
HEIMDAL_MUTEX_lock(&cred->cred_id_mutex);
/* Check if requested output usage is compatible with output usage */
if (cred->usage != cred_usage && cred->usage != GSS_C_BOTH) {
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
*minor_status = GSS_KRB5_S_G_BAD_USAGE;
return(GSS_S_FAILURE);
}
/* Check that we have the same name */
if (dname != NULL &&
krb5_principal_compare(context, dname,
cred->principal) != FALSE) {
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
*minor_status = 0;
return GSS_S_BAD_NAME;
}
if (output_cred_handle == NULL) {
/*
* This case is basically useless as we implement a single
* mechanism here, so we can't add elements to the
* input_cred_handle.
*/
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
*minor_status = 0;
return GSS_S_COMPLETE;
}
/*
* Copy input to output -- this works as if we were a
* GSS_Duplicate_cred() for one mechanism element.
*/
handle = calloc(1, sizeof(*handle));
if (handle == NULL) {
if (cred != NULL)
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
*minor_status = ENOMEM;
return (GSS_S_FAILURE);
}
handle->usage = cred_usage;
handle->endtime = cred->endtime;
handle->principal = NULL;
handle->keytab = NULL;
handle->ccache = NULL;
handle->mechanisms = NULL;
HEIMDAL_MUTEX_init(&handle->cred_id_mutex);
major = GSS_S_FAILURE;
*minor_status = krb5_copy_principal(context, cred->principal,
&handle->principal);
if (*minor_status) {
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
free(handle);
return GSS_S_FAILURE;
}
if (cred->keytab) {
char *name = NULL;
*minor_status = krb5_kt_get_full_name(context, cred->keytab,
&name);
if (*minor_status)
goto failure;
*minor_status = krb5_kt_resolve(context, name, &handle->keytab);
krb5_xfree(name);
if (*minor_status)
goto failure;
}
if (cred->ccache) {
const char *type, *name;
char *type_name = NULL;
type = krb5_cc_get_type(context, cred->ccache);
if (type == NULL){
*minor_status = ENOMEM;
goto failure;
}
if (strcmp(type, "MEMORY") == 0) {
*minor_status = krb5_cc_new_unique(context, type,
NULL, &handle->ccache);
if (*minor_status)
goto failure;
*minor_status = krb5_cc_copy_cache(context, cred->ccache,
handle->ccache);
if (*minor_status)
goto failure;
} else {
name = krb5_cc_get_name(context, cred->ccache);
if (name == NULL) {
*minor_status = ENOMEM;
goto failure;
}
if (asprintf(&type_name, "%s:%s", type, name) == -1 ||
type_name == NULL) {
*minor_status = ENOMEM;
goto failure;
}
*minor_status = krb5_cc_resolve(context, type_name,
&handle->ccache);
free(type_name);
if (*minor_status)
goto failure;
}
}
major = gss_create_empty_oid_set(minor_status, &handle->mechanisms);
if (major != GSS_S_COMPLETE)
goto failure;
major = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
&handle->mechanisms);
if (major != GSS_S_COMPLETE)
goto failure;
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
major = _gsskrb5_inquire_cred(minor_status, (gss_cred_id_t)cred,
NULL, &lifetime, NULL, actual_mechs);
if (major != GSS_S_COMPLETE)
goto failure;
*output_cred_handle = (gss_cred_id_t)handle;
}
if (initiator_time_rec)
*initiator_time_rec = lifetime;
if (acceptor_time_rec)
*acceptor_time_rec = lifetime;
*minor_status = 0;
return major;
failure:
if (handle) {
if (handle->principal)
krb5_free_principal(context, handle->principal);
if (handle->keytab)
krb5_kt_close(context, handle->keytab);
if (handle->ccache)
krb5_cc_destroy(context, handle->ccache);
if (handle->mechanisms)
gss_release_oid_set(NULL, &handle->mechanisms);
free(handle);
}
if (cred && output_cred_handle)
HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
return major;
}