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142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
/*
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* Dropbear - a SSH2 server
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*
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* Copyright (c) 2002,2003 Matt Johnston
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE. */
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#ifndef _AUTH_H_
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#define _AUTH_H_
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#include "includes.h"
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#include "signkey.h"
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#include "chansession.h"
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void svr_authinitialise();
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void cli_authinitialise();
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/* Server functions */
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void recv_msg_userauth_request();
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void send_msg_userauth_failure(int partial, int incrfail);
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void send_msg_userauth_success();
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void send_msg_userauth_banner(buffer *msg);
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void svr_auth_password();
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void svr_auth_pubkey();
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int authkeys_exists(void);
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void svr_auth_pam();
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#ifdef ENABLE_SVR_PUBKEY_OPTIONS
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int svr_pubkey_allows_agentfwd();
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int svr_pubkey_allows_tcpfwd();
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int svr_pubkey_allows_x11fwd();
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int svr_pubkey_allows_pty();
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void svr_pubkey_set_forced_command(struct ChanSess *chansess);
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void svr_pubkey_options_cleanup();
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int svr_add_pubkey_options(buffer *options_buf, int line_num, const char* filename);
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#else
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/* no option : success */
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#define svr_pubkey_allows_agentfwd() 1
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#define svr_pubkey_allows_tcpfwd() 1
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#define svr_pubkey_allows_x11fwd() 1
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#define svr_pubkey_allows_pty() 1
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static inline void svr_pubkey_set_forced_command(struct ChanSess *chansess) { }
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static inline void svr_pubkey_options_cleanup() { }
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#define svr_add_pubkey_options(x,y,z) DROPBEAR_SUCCESS
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#endif
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/* Client functions */
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void recv_msg_userauth_failure();
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void recv_msg_userauth_success();
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void recv_msg_userauth_specific_60();
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void recv_msg_userauth_pk_ok();
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void recv_msg_userauth_info_request();
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void cli_get_user();
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void cli_auth_getmethods();
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int cli_auth_try();
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void recv_msg_userauth_banner();
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void cli_pubkeyfail();
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void cli_auth_password();
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int cli_auth_pubkey();
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void cli_auth_interactive();
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char* getpass_or_cancel(char* prompt);
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void cli_auth_pubkey_cleanup();
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#define MAX_USERNAME_LEN 25 /* arbitrary for the moment */
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#define AUTH_TYPE_NONE 1
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#define AUTH_TYPE_PUBKEY 1 << 1
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#define AUTH_TYPE_PASSWORD 1 << 2
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#define AUTH_TYPE_INTERACT 1 << 3
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#define AUTH_METHOD_NONE "none"
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#define AUTH_METHOD_NONE_LEN 4
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#define AUTH_METHOD_PUBKEY "publickey"
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#define AUTH_METHOD_PUBKEY_LEN 9
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#define AUTH_METHOD_PASSWORD "password"
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#define AUTH_METHOD_PASSWORD_LEN 8
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#define AUTH_METHOD_INTERACT "keyboard-interactive"
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#define AUTH_METHOD_INTERACT_LEN 20
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/* This structure is shared between server and client - it contains
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* relatively little extraneous bits when used for the client rather than the
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* server */
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struct AuthState {
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char *username; /* This is the username the client presents to check. It
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is updated each run through, used for auth checking */
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unsigned char authtypes; /* Flags indicating which auth types are still
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valid */
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unsigned int failcount; /* Number of (failed) authentication attempts.*/
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unsigned authdone : 1; /* 0 if we haven't authed, 1 if we have. Applies for
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client and server (though has differing
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meanings). */
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unsigned perm_warn : 1; /* Server only, set if bad permissions on
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~/.ssh/authorized_keys have already been
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logged. */
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/* These are only used for the server */
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uid_t pw_uid;
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gid_t pw_gid;
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char *pw_dir;
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char *pw_shell;
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char *pw_name;
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char *pw_passwd;
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#ifdef ENABLE_SVR_PUBKEY_OPTIONS
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struct PubKeyOptions* pubkey_options;
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#endif
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};
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#ifdef ENABLE_SVR_PUBKEY_OPTIONS
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struct PubKeyOptions;
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struct PubKeyOptions {
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/* Flags */
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int no_port_forwarding_flag;
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int no_agent_forwarding_flag;
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int no_x11_forwarding_flag;
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int no_pty_flag;
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/* "command=" option. */
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unsigned char * forced_command;
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};
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#endif
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#endif /* _AUTH_H_ */
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