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/*
* Copyright (c) 2000, 2001 Markus Friedl. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* $OpenBSD: kex.h,v 1.32 2002/09/09 14:54:14 markus Exp $ */
#ifndef _KEX_H
#define _KEX_H
#ifdef __cplusplus
extern "C" {
#endif
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include "buffer.h"
#include "cipher.h"
#include "key.h"
#ifdef GSSAPI
#ifdef SUNW_GSSAPI
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_ext.h>
#else
#ifdef GSS_KRB5
#ifdef HEIMDAL
#include <gssapi.h>
#else
#include <gssapi_generic.h>
#endif /* HEIMDAL */
#endif /* GSS_KRB5 */
#endif /* SUNW_GSSAPI */
#endif /* GSSAPI */
#define KEX_DH1 "diffie-hellman-group1-sha1"
#define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
enum kex_init_proposals {
PROPOSAL_KEX_ALGS,
PROPOSAL_SERVER_HOST_KEY_ALGS,
PROPOSAL_ENC_ALGS_CTOS,
PROPOSAL_ENC_ALGS_STOC,
PROPOSAL_MAC_ALGS_CTOS,
PROPOSAL_MAC_ALGS_STOC,
PROPOSAL_COMP_ALGS_CTOS,
PROPOSAL_COMP_ALGS_STOC,
PROPOSAL_LANG_CTOS,
PROPOSAL_LANG_STOC,
PROPOSAL_MAX
};
enum kex_modes {
MODE_IN,
MODE_OUT,
MODE_MAX
};
enum kex_exchange {
KEX_DH_GRP1_SHA1,
KEX_DH_GEX_SHA1,
#ifdef GSSAPI
KEX_GSS_GRP1_SHA1,
#endif /* GSSAPI */
KEX_MAX
};
#define KEX_INIT_SENT 0x0001
typedef struct Kex Kex;
typedef struct Mac Mac;
typedef struct Comp Comp;
typedef struct Enc Enc;
typedef struct Newkeys Newkeys;
struct Enc {
char *name;
Cipher *cipher;
int enabled;
u_int key_len;
u_int block_size;
u_char *key;
u_char *iv;
};
struct Mac {
char *name;
int enabled;
u_int mac_len;
u_char *key;
u_int key_len;
int type;
const EVP_MD *evp_md;
HMAC_CTX evp_ctx;
};
struct Comp {
int type;
int enabled;
char *name;
};
struct Newkeys {
Enc enc;
Mac mac;
Comp comp;
};
struct KexOptions {
int gss_deleg_creds;
};
struct Kex {
u_char *session_id;
u_int session_id_len;
Newkeys *newkeys[MODE_MAX];
int we_need;
int server;
char *serverhost;
char *name;
int hostkey_type;
int kex_type;
Buffer my;
Buffer peer;
int initial_kex_done;
int done;
int flags;
char *client_version_string;
char *server_version_string;
struct KexOptions options;
int (*verify_host_key)(Key *);
int (*accept_host_key)(Key *); /* for GSS keyex */
Key *(*load_host_key)(int);
int (*host_key_index)(Key *);
void (*kex[KEX_MAX])(Kex *);
void (*kex_hook)(Kex *, char **); /* for GSS keyex rekeying */
#ifdef GSSAPI
gss_OID_set mechs; /* mechs in my proposal */
#endif /* GSSAPI */
};
typedef void (*Kex_hook_func)(Kex *, char **); /* for GSS-API rekeying */
Kex *kex_setup(const char *host,
char *proposal[PROPOSAL_MAX],
Kex_hook_func hook);
void kex_start(Kex *);
void kex_finish(Kex *);
void kex_send_kexinit(Kex *);
void kex_input_kexinit(int, u_int32_t, void *);
void kex_derive_keys(Kex *, u_char *, BIGNUM *);
Newkeys *kex_get_newkeys(int);
void kexdh_client(Kex *);
void kexdh_server(Kex *);
void kexgex_client(Kex *);
void kexgex_server(Kex *);
u_char *
kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
BIGNUM *, BIGNUM *, BIGNUM *);
u_char *
kexgex_hash(char *, char *, char *, int, char *, int, u_char *, int,
int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *);
#ifdef GSSAPI
void kexgss_client(Kex *);
void kexgss_server(Kex *);
#endif
#if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
void dump_digest(char *, u_char *, int);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _KEX_H */
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