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Annotation of src/usr.bin/ssh/kex.h, Revision 1.27

1.27    ! djm         1: /*     $OpenBSD: kex.h,v 1.26 2001/06/26 17:27:23 markus 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>
                     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;
1.25      itojun    110:        int     (*verify_host_key)(Key *);
                    111:        Key     *(*load_host_key)(int);
1.1       markus    112: };
                    113:
1.25      itojun    114: Kex    *kex_setup(char *[PROPOSAL_MAX]);
1.26      markus    115: void    kex_finish(Kex *);
1.20      markus    116:
1.26      markus    117: void    kex_send_kexinit(Kex *);
1.27    ! djm       118: void    kex_input_kexinit(int, int, u_int32_t, void *);
1.26      markus    119: void    kex_derive_keys(Kex *, u_char *, BIGNUM *);
1.18      markus    120:
1.26      markus    121: void    kexdh(Kex *);
                    122: void    kexgex(Kex *);
1.19      markus    123:
1.25      itojun    124: Newkeys *kex_get_newkeys(int);
1.18      markus    125:
                    126: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
1.25      itojun    127: void   dump_digest(char *, u_char *, int);
1.18      markus    128: #endif
1.1       markus    129:
                    130: #endif