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Annotation of src/usr.bin/ssh/kex.h, Revision 1.11

1.1       markus      1: /*
                      2:  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
                      3:  *
                      4:  * Redistribution and use in source and binary forms, with or without
                      5:  * modification, are permitted provided that the following conditions
                      6:  * are met:
                      7:  * 1. Redistributions of source code must retain the above copyright
                      8:  *    notice, this list of conditions and the following disclaimer.
                      9:  * 2. Redistributions in binary form must reproduce the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer in the
                     11:  *    documentation and/or other materials provided with the distribution.
                     12:  *
                     13:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     15:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     16:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     17:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     18:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     19:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     20:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     21:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     22:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     23:  */
                     24: #ifndef KEX_H
                     25: #define KEX_H
                     26:
1.5       provos     27: #define        KEX_DH1         "diffie-hellman-group1-sha1"
                     28: #define        KEX_DHGEX       "diffie-hellman-group-exchange-sha1"
                     29: #define        KEX_DSS         "ssh-dss"
1.1       markus     30:
                     31: enum kex_init_proposals {
                     32:        PROPOSAL_KEX_ALGS,
                     33:        PROPOSAL_SERVER_HOST_KEY_ALGS,
                     34:        PROPOSAL_ENC_ALGS_CTOS,
                     35:        PROPOSAL_ENC_ALGS_STOC,
                     36:        PROPOSAL_MAC_ALGS_CTOS,
                     37:        PROPOSAL_MAC_ALGS_STOC,
                     38:        PROPOSAL_COMP_ALGS_CTOS,
                     39:        PROPOSAL_COMP_ALGS_STOC,
                     40:        PROPOSAL_LANG_CTOS,
                     41:        PROPOSAL_LANG_STOC,
                     42:        PROPOSAL_MAX
                     43: };
                     44:
                     45: enum kex_modes {
                     46:        MODE_IN,
                     47:        MODE_OUT,
                     48:        MODE_MAX
                     49: };
                     50:
1.5       provos     51: enum kex_exchange {
                     52:        DH_GRP1_SHA1,
                     53:        DH_GEX_SHA1
                     54: };
                     55:
1.1       markus     56: typedef struct Kex Kex;
                     57: typedef struct Mac Mac;
                     58: typedef struct Comp Comp;
                     59: typedef struct Enc Enc;
                     60:
                     61: struct Enc {
1.6       markus     62:        char            *name;
                     63:        Cipher          *cipher;
1.1       markus     64:        int             enabled;
1.10      markus     65:        u_char  *key;
                     66:        u_char  *iv;
1.1       markus     67: };
                     68: struct Mac {
1.6       markus     69:        char            *name;
                     70:        int             enabled;
1.1       markus     71:        EVP_MD          *md;
                     72:        int             mac_len;
1.10      markus     73:        u_char  *key;
1.1       markus     74:        int             key_len;
                     75: };
                     76: struct Comp {
                     77:        int             type;
                     78:        int             enabled;
                     79:        char            *name;
                     80: };
                     81: struct Kex {
                     82:        Enc             enc [MODE_MAX];
                     83:        Mac             mac [MODE_MAX];
                     84:        Comp            comp[MODE_MAX];
                     85:        int             we_need;
                     86:        int             server;
                     87:        char            *name;
1.8       markus     88:        int             hostkey_type;
1.5       provos     89:        int             kex_type;
1.1       markus     90: };
                     91:
                     92: Buffer *kex_init(char *myproposal[PROPOSAL_MAX]);
1.3       markus     93: void
                     94: kex_exchange_kexinit(
                     95:     Buffer *my_kexinit, Buffer *peer_kexint,
                     96:     char *peer_proposal[PROPOSAL_MAX]);
                     97: Kex *
                     98: kex_choose_conf(char *cprop[PROPOSAL_MAX],
                     99:     char *sprop[PROPOSAL_MAX], int server);
1.10      markus    100: int    kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret);
1.3       markus    101: void   packet_set_kex(Kex *k);
1.2       markus    102: int    dh_pub_is_valid(DH *dh, BIGNUM *dh_pub);
1.5       provos    103: DH     *dh_new_group_asc(const char *, const char *);
                    104: DH     *dh_new_group(BIGNUM *, BIGNUM *);
1.11    ! markus    105: void   dh_gen_key(DH *);
        !           106: DH     *dh_new_group1(void);
1.1       markus    107:
1.10      markus    108: u_char *
1.1       markus    109: kex_hash(
                    110:     char *client_version_string,
                    111:     char *server_version_string,
                    112:     char *ckexinit, int ckexinitlen,
                    113:     char *skexinit, int skexinitlen,
                    114:     char *serverhostkeyblob, int sbloblen,
                    115:     BIGNUM *client_dh_pub,
                    116:     BIGNUM *server_dh_pub,
                    117:     BIGNUM *shared_secret);
                    118:
1.10      markus    119: u_char *
1.5       provos    120: kex_hash_gex(
                    121:     char *client_version_string,
                    122:     char *server_version_string,
                    123:     char *ckexinit, int ckexinitlen,
                    124:     char *skexinit, int skexinitlen,
                    125:     char *serverhostkeyblob, int sbloblen,
                    126:     int minbits, BIGNUM *prime, BIGNUM *gen,
                    127:     BIGNUM *client_dh_pub,
                    128:     BIGNUM *server_dh_pub,
                    129:     BIGNUM *shared_secret);
1.1       markus    130: #endif