-/* Returns the port number of the peer of the socket. */
-int get_peer_port(int sock);
-
-/* Returns the port number of the remote host. */
-int get_remote_port(void);
-
-/* Tries to match the host name (which must be in all lowercase) against the
- comma-separated sequence of subpatterns (each possibly preceded by ! to
- indicate negation). Returns true if there is a positive match; zero
- otherwise. */
-int match_hostname(const char *host, const char *pattern, unsigned int len);
-
-/* Checks whether the given host is already in the list of our known hosts.
- Returns HOST_OK if the host is known and has the specified key,
- HOST_NEW if the host is not known, and HOST_CHANGED if the host is known
- but used to have a different host key. The host must be in all lowercase. */
-typedef enum {
- HOST_OK, HOST_NEW, HOST_CHANGED
-} HostStatus;
-HostStatus
-check_host_in_hostfile(const char *filename, const char *host,
- BIGNUM * e, BIGNUM * n, BIGNUM * ke, BIGNUM * kn);
-
-/* Appends an entry to the host file. Returns false if the entry
- could not be appended. */
-int
-add_host_to_hostfile(const char *filename, const char *host,
- BIGNUM * e, BIGNUM * n);
-
-/* Performs the RSA authentication challenge-response dialog with the client,
- and returns true (non-zero) if the client gave the correct answer to
- our challenge; returns zero if the client gives a wrong answer. */
-int auth_rsa_challenge_dialog(BIGNUM * e, BIGNUM * n);
-
-/* Reads a passphrase from /dev/tty with echo turned off. Returns the
- passphrase (allocated with xmalloc). Exits if EOF is encountered.
- If from_stdin is true, the passphrase will be read from stdin instead. */
-char *read_passphrase(const char *prompt, int from_stdin);
-
-/* Saves the authentication (private) key in a file, encrypting it with
- passphrase. The identification of the file (lowest 64 bits of n)
- will precede the key to provide identification of the key without
- needing a passphrase. */
-int
-save_private_key(const char *filename, const char *passphrase,
- RSA * private_key, const char *comment);
-
-/* Loads the public part of the key file (public key and comment).
- Returns 0 if an error occurred; zero if the public key was successfully
- read. The comment of the key is returned in comment_return if it is
- non-NULL; the caller must free the value with xfree. */
-int
-load_public_key(const char *filename, RSA * pub,
- char **comment_return);
-
-/* Loads the private key from the file. Returns 0 if an error is encountered
- (file does not exist or is not readable, or passphrase is bad).
- This initializes the private key. The comment of the key is returned
- in comment_return if it is non-NULL; the caller must free the value
- with xfree. */
-int
-load_private_key(const char *filename, const char *passphrase,
- RSA * private_key, char **comment_return);
-
-/*------------ Definitions for logging. -----------------------*/
-
-/* Supported syslog facilities and levels. */
-typedef enum {
- SYSLOG_FACILITY_DAEMON,
- SYSLOG_FACILITY_USER,
- SYSLOG_FACILITY_AUTH,
- SYSLOG_FACILITY_LOCAL0,
- SYSLOG_FACILITY_LOCAL1,
- SYSLOG_FACILITY_LOCAL2,
- SYSLOG_FACILITY_LOCAL3,
- SYSLOG_FACILITY_LOCAL4,
- SYSLOG_FACILITY_LOCAL5,
- SYSLOG_FACILITY_LOCAL6,
- SYSLOG_FACILITY_LOCAL7
-} SyslogFacility;
-
-typedef enum {
- SYSLOG_LEVEL_QUIET,
- SYSLOG_LEVEL_FATAL,
- SYSLOG_LEVEL_ERROR,
- SYSLOG_LEVEL_INFO,
- SYSLOG_LEVEL_VERBOSE,
- SYSLOG_LEVEL_DEBUG
-} LogLevel;
-/* Initializes logging. */
-void log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr);
-
-/* Logging implementation, depending on server or client */
-void do_log(LogLevel level, const char *fmt, va_list args);
-
-/* name to facility/level */
-SyslogFacility log_facility_number(char *name);
-LogLevel log_level_number(char *name);
-
-/* Output a message to syslog or stderr */
-void fatal(const char *fmt,...) __attribute__((format(printf, 1, 2)));
-void error(const char *fmt,...) __attribute__((format(printf, 1, 2)));
-void log(const char *fmt,...) __attribute__((format(printf, 1, 2)));
-void verbose(const char *fmt,...) __attribute__((format(printf, 1, 2)));
-void debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
-
-/* same as fatal() but w/o logging */
-void fatal_cleanup(void);
-
-/* Registers a cleanup function to be called by fatal()/fatal_cleanup() before exiting.
- It is permissible to call fatal_remove_cleanup for the function itself
- from the function. */
-void fatal_add_cleanup(void (*proc) (void *context), void *context);
-
-/* Removes a cleanup function to be called at fatal(). */
-void fatal_remove_cleanup(void (*proc) (void *context), void *context);
-
-/*---------------- definitions for channels ------------------*/
-
-/* Sets specific protocol options. */
-void channel_set_options(int hostname_in_open);
-
-/* Allocate a new channel object and set its type and socket. Remote_name
- must have been allocated with xmalloc; this will free it when the channel
- is freed. */
-int channel_allocate(int type, int sock, char *remote_name);
-
-/* Free the channel and close its socket. */
-void channel_free(int channel);
-
-/* Add any bits relevant to channels in select bitmasks. */
-void channel_prepare_select(fd_set * readset, fd_set * writeset);
-
-/* After select, perform any appropriate operations for channels which
- have events pending. */
-void channel_after_select(fd_set * readset, fd_set * writeset);
-
-/* If there is data to send to the connection, send some of it now. */
-void channel_output_poll(void);
-
-/* This is called when a packet of type CHANNEL_DATA has just been received.
- The message type has already been consumed, but channel number and data
- is still there. */
-void channel_input_data(int payload_len);
-
-/* Returns true if no channel has too much buffered data. */
-int channel_not_very_much_buffered_data(void);
-
-/* This is called after receiving CHANNEL_CLOSE. */
-void channel_input_close(void);
-
-/* This is called after receiving CHANNEL_CLOSE_CONFIRMATION. */
-void channel_input_close_confirmation(void);
-
-/* This is called after receiving CHANNEL_OPEN_CONFIRMATION. */
-void channel_input_open_confirmation(void);
-
-/* This is called after receiving CHANNEL_OPEN_FAILURE from the other side. */
-void channel_input_open_failure(void);
-
-/* This closes any sockets that are listening for connections; this removes
- any unix domain sockets. */
-void channel_stop_listening(void);
-
-/* Closes the sockets of all channels. This is used to close extra file
- descriptors after a fork. */
-void channel_close_all(void);
-
-/* Returns the maximum file descriptor number used by the channels. */
-int channel_max_fd(void);
-
-/* Returns true if there is still an open channel over the connection. */
-int channel_still_open(void);
-
-/* Returns a string containing a list of all open channels. The list is
- suitable for displaying to the user. It uses crlf instead of newlines.
- The caller should free the string with xfree. */
-char *channel_open_message(void);
-
-/* Initiate forwarding of connections to local port "port" through the secure
- channel to host:port from remote side. This never returns if there
- was an error. */
-void
-channel_request_local_forwarding(int port, const char *host,
- int remote_port);
-
-/* Initiate forwarding of connections to port "port" on remote host through
- the secure channel to host:port from local side. This never returns
- if there was an error. This registers that open requests for that
- port are permitted. */
-void
-channel_request_remote_forwarding(int port, const char *host,
- int remote_port);
-
-/* Permits opening to any host/port in SSH_MSG_PORT_OPEN. This is usually
- called by the server, because the user could connect to any port anyway,
- and the server has no way to know but to trust the client anyway. */
-void channel_permit_all_opens(void);
-
-/* This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates
- listening for the port, and sends back a success reply (or disconnect
- message if there was an error). This never returns if there was an
- error. */
-void channel_input_port_forward_request(int is_root);
-
-/* This is called after receiving PORT_OPEN message. This attempts to connect
- to the given host:port, and sends back CHANNEL_OPEN_CONFIRMATION or
- CHANNEL_OPEN_FAILURE. */
-void channel_input_port_open(int payload_len);
-
-/* Creates a port for X11 connections, and starts listening for it.
- Returns the display name, or NULL if an error was encountered. */
-char *x11_create_display(int screen);
-
-/* Creates an internet domain socket for listening for X11 connections.
- Returns a suitable value for the DISPLAY variable, or NULL if an error
- occurs. */
-char *x11_create_display_inet(int screen);
-
-/* This is called when SSH_SMSG_X11_OPEN is received. The packet contains
- the remote channel number. We should do whatever we want, and respond
- with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE. */
-void x11_input_open(int payload_len);
-
-/* Requests forwarding of X11 connections. This should be called on the
- client only. */
-void x11_request_forwarding(void);
-
-/* Requests forwarding for X11 connections, with authentication spoofing.
- This should be called in the client only. */
-void x11_request_forwarding_with_spoofing(const char *proto, const char *data);
-
-/* Sends a message to the server to request authentication fd forwarding. */
-void auth_request_forwarding(void);
-
-/* Returns the name of the forwarded authentication socket. Returns NULL
- if there is no forwarded authentication socket. The returned value points
- to a static buffer. */
-char *auth_get_socket_name(void);
-
-/* This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
- This starts forwarding authentication requests. */
-void auth_input_request_forwarding(struct passwd * pw);
-
-/* This is called to process an SSH_SMSG_AGENT_OPEN message. */
-void auth_input_open_request(void);
-
-/* Returns true if the given string matches the pattern (which may contain
- ? and * as wildcards), and zero if it does not match. */
-int match_pattern(const char *s, const char *pattern);
-
-/* Expands tildes in the file name. Returns data allocated by xmalloc.
- Warning: this calls getpw*. */
-char *tilde_expand_filename(const char *filename, uid_t my_uid);
-
-/* Performs the interactive session. This handles data transmission between
- the client and the program. Note that the notion of stdin, stdout, and
- stderr in this function is sort of reversed: this function writes to
- stdin (of the child program), and reads from stdout and stderr (of the
- child program). */
-void server_loop(int pid, int fdin, int fdout, int fderr);
-
-/* Client side main loop for the interactive session. */
-int client_loop(int have_pty, int escape_char);
-
-/* Linked list of custom environment strings (see auth-rsa.c). */
-struct envstring {
- struct envstring *next;
- char *s;
-};
-#ifdef KRB4
-#include <krb.h>
-
-/* Performs Kerberos v4 mutual authentication with the client. This returns
- 0 if the client could not be authenticated, and 1 if authentication was
- successful. This may exit if there is a serious protocol violation. */
-int auth_krb4(const char *server_user, KTEXT auth, char **client);
-int krb4_init(uid_t uid);
-void krb4_cleanup_proc(void *ignore);
-
-#ifdef AFS
-#include <kafs.h>
-
-/* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
-int auth_kerberos_tgt(struct passwd * pw, const char *string);
-int auth_afs_token(struct passwd * pw, const char *token_string);
-
-int creds_to_radix(CREDENTIALS * creds, unsigned char *buf);
-int radix_to_creds(const char *buf, CREDENTIALS * creds);
-#endif /* AFS */