154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
/* $OpenBSD: kex.h,v 1.37 2005/07/25 11:59:39 markus Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#ifndef KEX_H
|
|
#define KEX_H
|
|
|
|
#include <openssl/evp.h>
|
|
#include "buffer.h"
|
|
#include "cipher.h"
|
|
#include "key.h"
|
|
|
|
#define KEX_DH1 "diffie-hellman-group1-sha1"
|
|
#define KEX_DH14 "diffie-hellman-group14-sha1"
|
|
#define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
|
|
|
|
#define COMP_NONE 0
|
|
#define COMP_ZLIB 1
|
|
#define COMP_DELAYED 2
|
|
|
|
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_GRP14_SHA1,
|
|
KEX_DH_GEX_SHA1,
|
|
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;
|
|
const EVP_MD *md;
|
|
u_int mac_len;
|
|
u_char *key;
|
|
u_int key_len;
|
|
};
|
|
struct Comp {
|
|
int type;
|
|
int enabled;
|
|
char *name;
|
|
};
|
|
struct Newkeys {
|
|
Enc enc;
|
|
Mac mac;
|
|
Comp comp;
|
|
};
|
|
struct Kex {
|
|
u_char *session_id;
|
|
u_int session_id_len;
|
|
Newkeys *newkeys[MODE_MAX];
|
|
u_int we_need;
|
|
int server;
|
|
char *name;
|
|
int hostkey_type;
|
|
int kex_type;
|
|
Buffer my;
|
|
Buffer peer;
|
|
int done;
|
|
int flags;
|
|
char *client_version_string;
|
|
char *server_version_string;
|
|
int (*verify_host_key)(Key *);
|
|
Key *(*load_host_key)(int);
|
|
int (*host_key_index)(Key *);
|
|
void (*kex[KEX_MAX])(Kex *);
|
|
};
|
|
|
|
Kex *kex_setup(char *[PROPOSAL_MAX]);
|
|
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 *);
|
|
|
|
void
|
|
derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
|
|
|
|
#if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
|
|
void dump_digest(char *, u_char *, int);
|
|
#endif
|
|
|
|
#endif
|