Annotation of src/usr.bin/ssh/kex.h, Revision 1.22
1.22 ! markus 1: /* $OpenBSD: kex.h,v 1.21 2001/04/04 14:34:58 markus Exp $ */
1.12 niklas 2:
1.1 markus 3: /*
4: * Copyright (c) 2000 Markus Friedl. All rights reserved.
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>
30: #include "buffer.h"
1.18 markus 31: #include "cipher.h"
32: #include "key.h"
1.14 markus 33:
1.5 provos 34: #define KEX_DH1 "diffie-hellman-group1-sha1"
35: #define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
1.1 markus 36:
37: enum kex_init_proposals {
38: PROPOSAL_KEX_ALGS,
39: PROPOSAL_SERVER_HOST_KEY_ALGS,
40: PROPOSAL_ENC_ALGS_CTOS,
41: PROPOSAL_ENC_ALGS_STOC,
42: PROPOSAL_MAC_ALGS_CTOS,
43: PROPOSAL_MAC_ALGS_STOC,
44: PROPOSAL_COMP_ALGS_CTOS,
45: PROPOSAL_COMP_ALGS_STOC,
46: PROPOSAL_LANG_CTOS,
47: PROPOSAL_LANG_STOC,
48: PROPOSAL_MAX
49: };
50:
51: enum kex_modes {
52: MODE_IN,
53: MODE_OUT,
54: MODE_MAX
55: };
56:
1.5 provos 57: enum kex_exchange {
58: DH_GRP1_SHA1,
59: DH_GEX_SHA1
60: };
1.13 stevesk 61:
1.19 markus 62: #define KEX_INIT_SENT 0x0001
63:
1.1 markus 64: typedef struct Kex Kex;
65: typedef struct Mac Mac;
66: typedef struct Comp Comp;
67: typedef struct Enc Enc;
1.19 markus 68: typedef struct Newkeys Newkeys;
1.1 markus 69:
70: struct Enc {
1.19 markus 71: char *name;
72: Cipher *cipher;
73: int enabled;
1.10 markus 74: u_char *key;
75: u_char *iv;
1.1 markus 76: };
77: struct Mac {
1.19 markus 78: char *name;
79: int enabled;
80: EVP_MD *md;
81: int mac_len;
1.10 markus 82: u_char *key;
1.19 markus 83: int key_len;
1.1 markus 84: };
85: struct Comp {
1.19 markus 86: int type;
87: int enabled;
88: char *name;
89: };
90: struct Newkeys {
91: Enc enc;
92: Mac mac;
93: Comp comp;
1.1 markus 94: };
95: struct Kex {
1.19 markus 96: u_char *session_id;
97: int session_id_len;
1.22 ! markus 98: Newkeys *newkeys[MODE_MAX];
1.19 markus 99: int we_need;
100: int server;
101: char *name;
102: int hostkey_type;
103: int kex_type;
104: Buffer my;
105: Buffer peer;
1.22 ! markus 106: int done;
1.19 markus 107: int flags;
108: char *client_version_string;
109: char *server_version_string;
110: int (*check_host_key)(Key *hostkey);
111: Key *(*load_host_key)(int type);
1.1 markus 112: };
113:
1.20 markus 114: Kex *kex_setup(char *proposal[PROPOSAL_MAX]);
115: void kex_finish(Kex *kex);
116:
1.19 markus 117: void kex_send_kexinit(Kex *kex);
1.21 markus 118: void kex_input_kexinit(int type, int plen, void *ctxt);
1.19 markus 119: void kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret);
1.18 markus 120:
121: void kexdh(Kex *);
122: void kexgex(Kex *);
1.19 markus 123:
124: Newkeys *kex_get_newkeys(int mode);
1.18 markus 125:
126: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
127: void dump_digest(char *msg, u_char *digest, int len);
128: #endif
1.1 markus 129:
130: #endif