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Annotation of src/usr.bin/ssh/kex.h, Revision 1.18

1.18    ! markus      1: /*     $OpenBSD: kex.h,v 1.17 2001/03/29 21:17:40 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:
1.1       markus     62: typedef struct Kex Kex;
                     63: typedef struct Mac Mac;
                     64: typedef struct Comp Comp;
                     65: typedef struct Enc Enc;
                     66:
                     67: struct Enc {
1.6       markus     68:        char            *name;
                     69:        Cipher          *cipher;
1.1       markus     70:        int             enabled;
1.10      markus     71:        u_char  *key;
                     72:        u_char  *iv;
1.1       markus     73: };
                     74: struct Mac {
1.6       markus     75:        char            *name;
                     76:        int             enabled;
1.1       markus     77:        EVP_MD          *md;
                     78:        int             mac_len;
1.10      markus     79:        u_char  *key;
1.1       markus     80:        int             key_len;
                     81: };
                     82: struct Comp {
                     83:        int             type;
                     84:        int             enabled;
                     85:        char            *name;
                     86: };
1.18    ! markus     87: #define KEX_INIT_SENT  0x0001
1.1       markus     88: struct Kex {
                     89:        Enc             enc [MODE_MAX];
                     90:        Mac             mac [MODE_MAX];
                     91:        Comp            comp[MODE_MAX];
                     92:        int             we_need;
                     93:        int             server;
                     94:        char            *name;
1.8       markus     95:        int             hostkey_type;
1.5       provos     96:        int             kex_type;
1.18    ! markus     97:
        !            98:        /* used during kex */
        !            99:        Buffer          my;
        !           100:        Buffer          peer;
        !           101:        int             newkeys;
        !           102:        int             flags;
        !           103:        void            *state;
        !           104:        char            *client_version_string;
        !           105:        char            *server_version_string;
        !           106:
        !           107:        int             (*check_host_key)(Key *hostkey);
        !           108:        Key             *(*load_host_key)(int type);
1.1       markus    109: };
                    110:
1.18    ! markus    111: void   kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret);
1.3       markus    112: void   packet_set_kex(Kex *k);
1.18    ! markus    113: Kex    *kex_start(char *proposal[PROPOSAL_MAX]);
        !           114: void   kex_send_newkeys(void);
        !           115: void   kex_protocol_error(int type, int plen, void *ctxt);
        !           116:
        !           117: void   kexdh(Kex *);
        !           118: void   kexgex(Kex *);
        !           119:
        !           120: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
        !           121: void   dump_digest(char *msg, u_char *digest, int len);
        !           122: #endif
1.1       markus    123:
                    124: #endif