/*
 * Copyright (c) 2010-2018 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Portions Copyright (c) 2010 Apple Inc. 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.
 */

#ifndef NETLOGON_NETLOGON_H
#define NETLOGON_NETLOGON_H

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>

#include <gssapi.h>
#include <gssapi_mech.h>
#include <gssapi_netlogon.h>

#include <krb5.h>

#include <roken.h>
#include <heim_threads.h>

#define HC_DEPRECATED_CRYPTO
#include "crypto-headers.h"

/*
 *
 */

typedef struct {
#define NL_NEGOTIATE_REQUEST_MESSAGE    0x00000000
#define NL_NEGOTIATE_RESPONSE_MESSAGE   0x00000001
    uint32_t MessageType;
#define NL_FLAG_NETBIOS_DOMAIN_NAME     0x00000001
#define NL_FLAG_NETBIOS_COMPUTER_NAME   0x00000002
#define NL_FLAG_DNS_DOMAIN_NAME         0x00000004
#define NL_FLAG_DNS_HOST_NAME           0x00000008 /* not used */
#define NL_FLAG_UTF8_COMPUTER_NAME      0x00000010
    uint32_t Flags;
    char *Buffer[0];
} NL_AUTH_MESSAGE;

#define NL_AUTH_MESSAGE_LENGTH          8

/* SignatureAlgorithm */
#define NL_SIGN_ALG_HMAC_MD5            0x0077
#define NL_SIGN_ALG_SHA256              0x0013

/* SealAlgorithm */
#define NL_SEAL_ALG_RC4                 0x007A
#define NL_SEAL_ALG_AES128              0x001A
#define NL_SEAL_ALG_NONE                0xFFFF

typedef struct {
    uint16_t SignatureAlgorithm;
    uint16_t SealAlgorithm;
    uint16_t Pad;
    uint16_t Flags;
    uint8_t SequenceNumber[8];
    uint8_t Checksum[8];
    uint8_t Confounder[8];
} NL_AUTH_SIGNATURE;

#define NL_AUTH_SIGNATURE_HEADER_LENGTH 8
#define NL_AUTH_SIGNATURE_COMMON_LENGTH 16
#define NL_AUTH_SIGNATURE_LENGTH        32

typedef struct {
    uint16_t SignatureAlgorithm;
    uint16_t SealAlgorithm;
    uint16_t Pad;
    uint16_t Flags;
    uint8_t SequenceNumber[8];
    uint8_t Checksum[32];
    uint8_t Confounder[8];
} NL_AUTH_SHA2_SIGNATURE;

#define NL_AUTH_SHA2_SIGNATURE_LENGTH   56

typedef union {
    NL_AUTH_SIGNATURE Signature;
    NL_AUTH_SHA2_SIGNATURE SHA2Signature;
} NL_AUTH_SIGNATURE_U;

#define NL_AUTH_SIGNATURE_P(_u)         (&(_u)->Signature)

typedef struct gssnetlogon_name {
    gss_buffer_desc NetbiosName;
    gss_buffer_desc DnsName;
} *gssnetlogon_name;
typedef const struct gssnetlogon_name *gssnetlogon_const_name;

typedef struct gssnetlogon_cred {
    gssnetlogon_name *Name;
    uint16_t SignatureAlgorithm;
    uint16_t SealAlgorithm;
    uint8_t SessionKey[16];
} *gssnetlogon_cred;
typedef const struct gssnetlogon_cred *gssnetlogon_const_cred;

typedef struct gssnetlogon_ctx {
    HEIMDAL_MUTEX Mutex;
    enum { NL_AUTH_NEGOTIATE, NL_AUTH_ESTABLISHED } State;
    OM_uint32 GssFlags;
    uint8_t LocallyInitiated;
    uint32_t MessageBlockSize;
    uint16_t SignatureAlgorithm;
    uint16_t SealAlgorithm;
    uint64_t SequenceNumber;
    gssnetlogon_name SourceName;
    gssnetlogon_name TargetName;
    uint8_t SessionKey[16];
} *gssnetlogon_ctx;

#include <netlogon-private.h>

#endif /* NETLOGON_NETLOGON_H */