-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(u_short port, const char *host,
- u_short remote_port, int gateway_ports);
-
-/*
- * 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(u_short port, const char *host,
- u_short 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, int x11_display_offset);
-
-/*
- * 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;
-};
-
-/*
- * Ensure all of data on socket comes through. f==read || f==write
- */
-int atomicio(int (*f)(), int fd, void *s, size_t n);
-
-#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);
-int auth_krb4_password(struct passwd * pw, const char *password);
-
-#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 */
-
-#endif /* KRB4 */