/*
 * Copyright (c) 2004, PADL Software Pty Ltd.
 * 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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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 "mech_locl.h"

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_create_empty_buffer_set
	   (OM_uint32 * minor_status,
	    gss_buffer_set_t *buffer_set)
{
    gss_buffer_set_t set;

    set = (gss_buffer_set_desc *) malloc(sizeof(*set));
    if (set == GSS_C_NO_BUFFER_SET) {
	*minor_status = ENOMEM;
	return GSS_S_FAILURE;
    }

    set->count = 0;
    set->elements = NULL;

    *buffer_set = set;

    *minor_status = 0;
    return GSS_S_COMPLETE;
}

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_add_buffer_set_member
	   (OM_uint32 * minor_status,
	    const gss_buffer_t member_buffer,
	    gss_buffer_set_t *buffer_set)
{
    gss_buffer_set_t set;
    gss_buffer_t p;
    OM_uint32 ret;

    if (*buffer_set == GSS_C_NO_BUFFER_SET) {
	ret = gss_create_empty_buffer_set(minor_status,
					  buffer_set);
	if (ret) {
	    return ret;
	}
    }

    set = *buffer_set;
    set->elements = realloc(set->elements,
			    (set->count + 1) * sizeof(set->elements[0]));
    if (set->elements == NULL) {
	*minor_status = ENOMEM;
	return GSS_S_FAILURE;
    }

    p = &set->elements[set->count];

    p->value = malloc(member_buffer->length);
    if (p->value == NULL) {
	*minor_status = ENOMEM;
	return GSS_S_FAILURE;
    }
    memcpy(p->value, member_buffer->value, member_buffer->length);
    p->length = member_buffer->length;

    set->count++;

    *minor_status = 0;
    return GSS_S_COMPLETE;
}

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_release_buffer_set(OM_uint32 * minor_status,
		       gss_buffer_set_t *buffer_set)
{
    size_t i;
    OM_uint32 minor;

    *minor_status = 0;

    if (*buffer_set == GSS_C_NO_BUFFER_SET)
	return GSS_S_COMPLETE;

    for (i = 0; i < (*buffer_set)->count; i++)
	gss_release_buffer(&minor, &((*buffer_set)->elements[i]));

    free((*buffer_set)->elements);

    (*buffer_set)->elements = NULL;
    (*buffer_set)->count = 0;

    free(*buffer_set);
    *buffer_set = GSS_C_NO_BUFFER_SET;

    return GSS_S_COMPLETE;
}