2 * Dropbear - a SSH2 server
4 * Copyright (c) 2002,2003 Matt Johnston
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 void svr_authinitialise();
31 void cli_authinitialise();
33 /* Server functions */
34 void recv_msg_userauth_request();
35 void send_msg_userauth_failure(int partial, int incrfail);
36 void send_msg_userauth_success();
37 void svr_auth_password();
38 void svr_auth_pubkey();
41 /* Client functions */
42 void recv_msg_userauth_failure();
43 void recv_msg_userauth_success();
44 void recv_msg_userauth_pk_ok();
46 void cli_auth_getmethods();
48 void recv_msg_userauth_banner();
49 void cli_pubkeyfail();
50 int cli_auth_password();
51 int cli_auth_pubkey();
54 #define MAX_USERNAME_LEN 25 /* arbitrary for the moment */
56 #define AUTH_TYPE_PUBKEY 1 << 0
57 #define AUTH_TYPE_PASSWORD 1 << 1
59 /* auth types, "none" means we should return list of acceptable types */
60 #define AUTH_METHOD_NONE "none"
61 #define AUTH_METHOD_NONE_LEN 4
62 #define AUTH_METHOD_PUBKEY "publickey"
63 #define AUTH_METHOD_PUBKEY_LEN 9
64 #define AUTH_METHOD_PASSWORD "password"
65 #define AUTH_METHOD_PASSWORD_LEN 8
67 /* This structure is shared between server and client - it contains
68 * relatively little extraneous bits when used for the client rather than the
72 char *username; /* This is the username the client presents to check. It
73 is updated each run through, used for auth checking */
74 unsigned char authtypes; /* Flags indicating which auth types are still
76 unsigned int failcount; /* Number of (failed) authentication attempts.*/
77 unsigned authdone : 1; /* 0 if we haven't authed, 1 if we have. Applies for
78 client and server (though has differing [obvious]
81 /* These are only used for the server */
82 char *printableuser; /* stripped of control chars, used for logs etc */
88 /* A singly linked list of signing keys */
92 int type; /* The type of key */
93 struct SignKeyList *next;
94 /* filename? or the buffer? for encrypted keys, so we can later get
95 * the private key portion */