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