libssh  0.10.6
The SSH library
dh.h
1 /*
2  * This file is part of the SSH Library
3  *
4  * Copyright (c) 2009 by Aris Adamantiadis
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef DH_H_
22 #define DH_H_
23 
24 #include "config.h"
25 
26 #include "libssh/crypto.h"
27 
28 struct dh_ctx;
29 
30 #define DH_CLIENT_KEYPAIR 0
31 #define DH_SERVER_KEYPAIR 1
32 
33 #ifdef __cplusplus
34 extern "C" {
35 #endif
36 
37 /* functions implemented by crypto backends */
38 int ssh_dh_init_common(struct ssh_crypto_struct *crypto);
39 void ssh_dh_cleanup(struct ssh_crypto_struct *crypto);
40 
41 #if !defined(HAVE_LIBCRYPTO) || OPENSSL_VERSION_NUMBER < 0x30000000L
42 int ssh_dh_get_parameters(struct dh_ctx *ctx,
43  const_bignum *modulus, const_bignum *generator);
44 #else
45 int ssh_dh_get_parameters(struct dh_ctx *ctx,
46  bignum *modulus, bignum *generator);
47 #endif /* OPENSSL_VERSION_NUMBER */
48 int ssh_dh_set_parameters(struct dh_ctx *ctx,
49  const bignum modulus, const bignum generator);
50 
51 int ssh_dh_keypair_gen_keys(struct dh_ctx *ctx, int peer);
52 #if !defined(HAVE_LIBCRYPTO) || OPENSSL_VERSION_NUMBER < 0x30000000L
53 int ssh_dh_keypair_get_keys(struct dh_ctx *ctx, int peer,
54  const_bignum *priv, const_bignum *pub);
55 #else
56 int ssh_dh_keypair_get_keys(struct dh_ctx *ctx, int peer,
57  bignum *priv, bignum *pub);
58 #endif /* OPENSSL_VERSION_NUMBER */
59 int ssh_dh_keypair_set_keys(struct dh_ctx *ctx, int peer,
60  bignum priv, bignum pub);
61 
62 int ssh_dh_compute_shared_secret(struct dh_ctx *ctx, int local, int remote,
63  bignum *dest);
64 
65 void ssh_dh_debug_crypto(struct ssh_crypto_struct *c);
66 
67 /* common functions */
68 int ssh_dh_init(void);
69 void ssh_dh_finalize(void);
70 
71 int ssh_dh_import_next_pubkey_blob(ssh_session session,
72  ssh_string pubkey_blob);
73 
74 ssh_key ssh_dh_get_current_server_publickey(ssh_session session);
75 int ssh_dh_get_current_server_publickey_blob(ssh_session session,
76  ssh_string *pubkey_blob);
77 ssh_key ssh_dh_get_next_server_publickey(ssh_session session);
78 int ssh_dh_get_next_server_publickey_blob(ssh_session session,
79  ssh_string *pubkey_blob);
80 int dh_handshake(ssh_session session);
81 
82 int ssh_client_dh_init(ssh_session session);
83 void ssh_client_dh_remove_callbacks(ssh_session session);
84 #ifdef WITH_SERVER
85 void ssh_server_dh_init(ssh_session session);
86 #endif /* WITH_SERVER */
87 int ssh_server_dh_process_init(ssh_session session, ssh_buffer packet);
88 int ssh_fallback_group(uint32_t pmax, bignum *p, bignum *g);
89 bool ssh_dh_is_known_group(bignum modulus, bignum generator);
90 
91 #ifdef __cplusplus
92 }
93 #endif
94 
95 #endif /* DH_H_ */
ssh_key_struct
Definition: pki.h:54
ssh_crypto_struct
Definition: crypto.h:106
ssh_buffer_struct
Definition: buffer.c:48
ssh_session_struct
Definition: session.h:127
dh_ctx
Definition: dh_crypto.c:47
ssh_string_struct
Definition: string.h:33