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the bandwidth of long fat pipes (i.e. 100Mbps+ trans-oceanic or trans-continental links). Bandwidth-delay products up to 64MB are supported. Also add support (not compiled by default) for the None cypher. The None cypher can only be enabled on non-interactive sessions (those without a pty where -T was not used) and must be enabled in both the client and server configuration files and on the client command line. Additionally, the None cypher will only be activated after authentication is complete. To enable the None cypher you must add -DNONE_CIPHER_ENABLED to CFLAGS via the make command line or in /etc/make.conf. This code is a style(9) compliant version of these features extracted from the patches published at: http://www.psc.edu/networking/projects/hpn-ssh/ Merging this patch has been a collaboration between me and Bjoern. Reviewed by: bz Approved by: re (kib), des (maintainer)
191 lines
4.8 KiB
C
191 lines
4.8 KiB
C
/* $OpenBSD: kex.h,v 1.52 2010/09/22 05:01:29 djm Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef KEX_H
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#define KEX_H
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#include <signal.h>
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#include <openssl/evp.h>
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#include <openssl/hmac.h>
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#ifdef OPENSSL_HAS_ECC
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#include <openssl/ec.h>
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#endif
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#define KEX_COOKIE_LEN 16
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#define KEX_DH1 "diffie-hellman-group1-sha1"
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#define KEX_DH14 "diffie-hellman-group14-sha1"
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#define KEX_DHGEX_SHA1 "diffie-hellman-group-exchange-sha1"
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#define KEX_DHGEX_SHA256 "diffie-hellman-group-exchange-sha256"
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#define KEX_RESUME "resume@appgate.com"
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/* The following represents the family of ECDH methods */
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#define KEX_ECDH_SHA2_STEM "ecdh-sha2-"
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#define COMP_NONE 0
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#define COMP_ZLIB 1
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#define COMP_DELAYED 2
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enum kex_init_proposals {
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PROPOSAL_KEX_ALGS,
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PROPOSAL_SERVER_HOST_KEY_ALGS,
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PROPOSAL_ENC_ALGS_CTOS,
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PROPOSAL_ENC_ALGS_STOC,
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PROPOSAL_MAC_ALGS_CTOS,
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PROPOSAL_MAC_ALGS_STOC,
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PROPOSAL_COMP_ALGS_CTOS,
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PROPOSAL_COMP_ALGS_STOC,
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PROPOSAL_LANG_CTOS,
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PROPOSAL_LANG_STOC,
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PROPOSAL_MAX
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};
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enum kex_modes {
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MODE_IN,
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MODE_OUT,
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MODE_MAX
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};
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enum kex_exchange {
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KEX_DH_GRP1_SHA1,
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KEX_DH_GRP14_SHA1,
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KEX_DH_GEX_SHA1,
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KEX_DH_GEX_SHA256,
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KEX_ECDH_SHA2,
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KEX_MAX
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};
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#define KEX_INIT_SENT 0x0001
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typedef struct Kex Kex;
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typedef struct Mac Mac;
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typedef struct Comp Comp;
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typedef struct Enc Enc;
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typedef struct Newkeys Newkeys;
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struct Enc {
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char *name;
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Cipher *cipher;
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int enabled;
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u_int key_len;
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u_int block_size;
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u_char *key;
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u_char *iv;
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};
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struct Mac {
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char *name;
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int enabled;
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u_int mac_len;
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u_char *key;
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u_int key_len;
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int type;
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const EVP_MD *evp_md;
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HMAC_CTX evp_ctx;
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struct umac_ctx *umac_ctx;
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};
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struct Comp {
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int type;
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int enabled;
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char *name;
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};
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struct Newkeys {
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Enc enc;
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Mac mac;
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Comp comp;
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};
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struct Kex {
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u_char *session_id;
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u_int session_id_len;
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Newkeys *newkeys[MODE_MAX];
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u_int we_need;
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int server;
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char *name;
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int hostkey_type;
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int kex_type;
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int roaming;
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Buffer my;
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Buffer peer;
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sig_atomic_t done;
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int flags;
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const EVP_MD *evp_md;
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char *client_version_string;
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char *server_version_string;
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int (*verify_host_key)(Key *);
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Key *(*load_host_public_key)(int);
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Key *(*load_host_private_key)(int);
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int (*host_key_index)(Key *);
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void (*kex[KEX_MAX])(Kex *);
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};
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int kex_names_valid(const char *);
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#ifdef NONE_CIPHER_ENABLED
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void kex_prop2buf(Buffer *, char *[PROPOSAL_MAX]);
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#endif
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Kex *kex_setup(char *[PROPOSAL_MAX]);
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void kex_finish(Kex *);
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void kex_send_kexinit(Kex *);
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void kex_input_kexinit(int, u_int32_t, void *);
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void kex_derive_keys(Kex *, u_char *, u_int, BIGNUM *);
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Newkeys *kex_get_newkeys(int);
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void kexdh_client(Kex *);
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void kexdh_server(Kex *);
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void kexgex_client(Kex *);
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void kexgex_server(Kex *);
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void kexecdh_client(Kex *);
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void kexecdh_server(Kex *);
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void
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kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
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BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
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void
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kexgex_hash(const EVP_MD *, char *, char *, char *, int, char *,
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int, u_char *, int, int, int, int, BIGNUM *, BIGNUM *, BIGNUM *,
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BIGNUM *, BIGNUM *, u_char **, u_int *);
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#ifdef OPENSSL_HAS_ECC
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void
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kex_ecdh_hash(const EVP_MD *, const EC_GROUP *, char *, char *, char *, int,
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char *, int, u_char *, int, const EC_POINT *, const EC_POINT *,
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const BIGNUM *, u_char **, u_int *);
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int kex_ecdh_name_to_nid(const char *);
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const EVP_MD *kex_ecdh_name_to_evpmd(const char *);
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#else
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# define kex_ecdh_name_to_nid(x) (-1)
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# define kex_ecdh_name_to_evpmd(x) (NULL)
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#endif
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void
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derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
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#if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH)
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void dump_digest(char *, u_char *, int);
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#endif
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#endif
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