113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Markus Friedl.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef KEX_H
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#define KEX_H
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#define KEX_DH1 "diffie-hellman-group1-sha1"
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#define KEX_DSS "ssh-dss"
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enum kex_init_proposals {
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PROPOSAL_KEX_ALGS,
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PROPOSAL_SERVER_HOST_KEY_ALGS,
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PROPOSAL_ENC_ALGS_CTOS,
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PROPOSAL_ENC_ALGS_STOC,
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PROPOSAL_MAC_ALGS_CTOS,
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PROPOSAL_MAC_ALGS_STOC,
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PROPOSAL_COMP_ALGS_CTOS,
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PROPOSAL_COMP_ALGS_STOC,
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PROPOSAL_LANG_CTOS,
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PROPOSAL_LANG_STOC,
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PROPOSAL_MAX
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};
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enum kex_modes {
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MODE_IN,
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MODE_OUT,
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MODE_MAX
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};
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typedef struct Kex Kex;
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typedef struct Mac Mac;
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typedef struct Comp Comp;
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typedef struct Enc Enc;
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struct Enc {
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int type;
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int enabled;
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int block_size;
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unsigned char *key;
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unsigned char *iv;
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int key_len;
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int iv_len;
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char *name;
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};
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struct Mac {
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EVP_MD *md;
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int enabled;
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int mac_len;
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unsigned char *key;
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int key_len;
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char *name;
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};
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struct Comp {
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int type;
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int enabled;
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char *name;
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};
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struct Kex {
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Enc enc [MODE_MAX];
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Mac mac [MODE_MAX];
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Comp comp[MODE_MAX];
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int we_need;
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int server;
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char *name;
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char *hostkeyalg;
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};
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Buffer *kex_init(char *myproposal[PROPOSAL_MAX]);
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int dh_pub_is_valid(DH *dh, BIGNUM *dh_pub);
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DH *dh_new_group1();
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Kex *kex_choose_conf(char *cprop[PROPOSAL_MAX], char *sprop[PROPOSAL_MAX], int server);
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int kex_derive_keys(Kex *k, unsigned char *hash, BIGNUM *shared_secret);
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void bignum_print(BIGNUM *b);
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void packet_set_kex(Kex *k);
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unsigned char *
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kex_hash(
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char *client_version_string,
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char *server_version_string,
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char *ckexinit, int ckexinitlen,
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char *skexinit, int skexinitlen,
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char *serverhostkeyblob, int sbloblen,
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BIGNUM *client_dh_pub,
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BIGNUM *server_dh_pub,
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BIGNUM *shared_secret);
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#endif
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