Annotation of src/usr.bin/ssh/kex.h, Revision 1.43
1.43 ! stevesk 1: /* $OpenBSD: kex.h,v 1.42 2006/04/20 09:27:09 djm Exp $ */
1.12 niklas 2:
1.1 markus 3: /*
1.24 markus 4: * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
1.1 markus 5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: *
15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26: #ifndef KEX_H
27: #define KEX_H
28:
1.14 markus 29: #include <openssl/evp.h>
1.43 ! stevesk 30:
! 31: #include <signal.h>
! 32:
1.14 markus 33: #include "buffer.h"
1.18 markus 34: #include "cipher.h"
35: #include "key.h"
1.14 markus 36:
1.38 djm 37: #define KEX_DH1 "diffie-hellman-group1-sha1"
38: #define KEX_DH14 "diffie-hellman-group14-sha1"
39: #define KEX_DHGEX_SHA1 "diffie-hellman-group-exchange-sha1"
1.39 djm 40: #define KEX_DHGEX_SHA256 "diffie-hellman-group-exchange-sha256"
1.37 markus 41:
42: #define COMP_NONE 0
43: #define COMP_ZLIB 1
44: #define COMP_DELAYED 2
1.1 markus 45:
46: enum kex_init_proposals {
47: PROPOSAL_KEX_ALGS,
48: PROPOSAL_SERVER_HOST_KEY_ALGS,
49: PROPOSAL_ENC_ALGS_CTOS,
50: PROPOSAL_ENC_ALGS_STOC,
51: PROPOSAL_MAC_ALGS_CTOS,
52: PROPOSAL_MAC_ALGS_STOC,
53: PROPOSAL_COMP_ALGS_CTOS,
54: PROPOSAL_COMP_ALGS_STOC,
55: PROPOSAL_LANG_CTOS,
56: PROPOSAL_LANG_STOC,
57: PROPOSAL_MAX
58: };
59:
60: enum kex_modes {
61: MODE_IN,
62: MODE_OUT,
63: MODE_MAX
64: };
65:
1.5 provos 66: enum kex_exchange {
1.33 markus 67: KEX_DH_GRP1_SHA1,
1.35 djm 68: KEX_DH_GRP14_SHA1,
1.33 markus 69: KEX_DH_GEX_SHA1,
1.39 djm 70: KEX_DH_GEX_SHA256,
1.33 markus 71: KEX_MAX
1.5 provos 72: };
1.13 stevesk 73:
1.19 markus 74: #define KEX_INIT_SENT 0x0001
75:
1.1 markus 76: typedef struct Kex Kex;
77: typedef struct Mac Mac;
78: typedef struct Comp Comp;
79: typedef struct Enc Enc;
1.19 markus 80: typedef struct Newkeys Newkeys;
1.1 markus 81:
82: struct Enc {
1.19 markus 83: char *name;
84: Cipher *cipher;
85: int enabled;
1.29 markus 86: u_int key_len;
87: u_int block_size;
1.10 markus 88: u_char *key;
89: u_char *iv;
1.1 markus 90: };
91: struct Mac {
1.19 markus 92: char *name;
93: int enabled;
1.31 markus 94: const EVP_MD *md;
1.36 djm 95: u_int mac_len;
1.10 markus 96: u_char *key;
1.36 djm 97: u_int key_len;
1.1 markus 98: };
99: struct Comp {
1.19 markus 100: int type;
101: int enabled;
102: char *name;
103: };
104: struct Newkeys {
105: Enc enc;
106: Mac mac;
107: Comp comp;
1.1 markus 108: };
109: struct Kex {
1.19 markus 110: u_char *session_id;
1.32 markus 111: u_int session_id_len;
1.22 markus 112: Newkeys *newkeys[MODE_MAX];
1.36 djm 113: u_int we_need;
1.19 markus 114: int server;
115: char *name;
116: int hostkey_type;
117: int kex_type;
118: Buffer my;
119: Buffer peer;
1.42 djm 120: sig_atomic_t done;
1.19 markus 121: int flags;
1.38 djm 122: const EVP_MD *evp_md;
1.19 markus 123: char *client_version_string;
124: char *server_version_string;
1.25 itojun 125: int (*verify_host_key)(Key *);
126: Key *(*load_host_key)(int);
1.30 provos 127: int (*host_key_index)(Key *);
1.33 markus 128: void (*kex[KEX_MAX])(Kex *);
1.1 markus 129: };
130:
1.25 itojun 131: Kex *kex_setup(char *[PROPOSAL_MAX]);
1.26 markus 132: void kex_finish(Kex *);
1.20 markus 133:
1.26 markus 134: void kex_send_kexinit(Kex *);
1.28 markus 135: void kex_input_kexinit(int, u_int32_t, void *);
1.38 djm 136: void kex_derive_keys(Kex *, u_char *, u_int, BIGNUM *);
1.18 markus 137:
1.33 markus 138: Newkeys *kex_get_newkeys(int);
1.19 markus 139:
1.33 markus 140: void kexdh_client(Kex *);
141: void kexdh_server(Kex *);
142: void kexgex_client(Kex *);
143: void kexgex_server(Kex *);
144:
1.38 djm 145: void
1.33 markus 146: kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
1.38 djm 147: BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
148: void
149: kexgex_hash(const EVP_MD *, char *, char *, char *, int, char *,
1.40 deraadt 150: int, u_char *, int, int, int, int, BIGNUM *, BIGNUM *, BIGNUM *,
1.38 djm 151: BIGNUM *, BIGNUM *, u_char **, u_int *);
1.34 markus 152:
153: void
154: derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
1.18 markus 155:
156: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
1.25 itojun 157: void dump_digest(char *, u_char *, int);
1.18 markus 158: #endif
1.1 markus 159:
160: #endif
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