5 * Author: Tatu Ylonen <ylo@cs.hut.fi>
7 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
10 * Created: Fri Mar 17 17:09:37 1995 ylo
12 * Generic header file for ssh.
21 #include <netinet/in.h> /* For struct sockaddr_in */
22 #include <pwd.h> /* For struct pw */
23 #include <stdarg.h> /* For va_list */
24 #ifdef HAVE_SYS_SELECT_H
25 # include <sys/select.h>
31 * The default cipher used if IDEA is not supported by the remote host. It is
32 * recommended that this be one of the mandatory ciphers (DES, 3DES), though
33 * that is not required.
35 #define SSH_FALLBACK_CIPHER SSH_CIPHER_3DES
37 /* Cipher used for encrypting authentication files. */
38 #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES
40 /* Default port number. */
41 #define SSH_DEFAULT_PORT 22
43 /* Maximum number of TCP/IP ports forwarded per direction. */
44 #define SSH_MAX_FORWARDS_PER_DIRECTION 100
47 * Maximum number of RSA authentication identity files that can be specified
48 * in configuration files or on the command line.
50 #define SSH_MAX_IDENTITY_FILES 100
53 * Major protocol version. Different version indicates major incompatiblity
54 * that prevents communication.
56 #define PROTOCOL_MAJOR 1
59 * Minor protocol version. Different version indicates minor incompatibility
60 * that does not prevent interoperation.
62 #define PROTOCOL_MINOR 5
65 * Name for the service. The port named by this service overrides the
66 * default port if present.
68 #define SSH_SERVICE_NAME "ssh"
75 #define PIDDIR "/var/run"
79 * System-wide file containing host keys of known hosts. This file should be
82 #define SSH_SYSTEM_HOSTFILE ETCDIR "/ssh_known_hosts"
85 * Of these, ssh_host_key must be readable only by root, whereas ssh_config
86 * should be world-readable.
88 #define HOST_KEY_FILE ETCDIR "/ssh_host_key"
89 #define SERVER_CONFIG_FILE ETCDIR "/sshd_config"
90 #define HOST_CONFIG_FILE ETCDIR "/ssh_config"
93 #define SSH_PROGRAM "/usr/bin/ssh"
94 #endif /* SSH_PROGRAM */
97 #define LOGIN_PROGRAM "/usr/bin/login"
98 #endif /* LOGIN_PROGRAM */
100 #ifndef ASKPASS_PROGRAM
101 #define ASKPASS_PROGRAM "/usr/lib/ssh/ssh-askpass"
102 #endif /* ASKPASS_PROGRAM */
105 * The process id of the daemon listening for connections is saved here to
106 * make it easier to kill the correct daemon when necessary.
108 #define SSH_DAEMON_PID_FILE PIDDIR "/sshd.pid"
111 * The directory in user\'s home directory in which the files reside. The
112 * directory should be world-readable (though not all files are).
114 #define SSH_USER_DIR ".ssh"
117 * Per-user file containing host keys of known hosts. This file need not be
118 * readable by anyone except the user him/herself, though this does not
119 * contain anything particularly secret.
121 #define SSH_USER_HOSTFILE "~/.ssh/known_hosts"
124 * Name of the default file containing client-side authentication key. This
125 * file should only be readable by the user him/herself.
127 #define SSH_CLIENT_IDENTITY ".ssh/identity"
130 * Configuration file in user\'s home directory. This file need not be
131 * readable by anyone but the user him/herself, but does not contain anything
132 * particularly secret. If the user\'s home directory resides on an NFS
133 * volume where root is mapped to nobody, this may need to be world-readable.
135 #define SSH_USER_CONFFILE ".ssh/config"
138 * File containing a list of those rsa keys that permit logging in as this
139 * user. This file need not be readable by anyone but the user him/herself,
140 * but does not contain anything particularly secret. If the user\'s home
141 * directory resides on an NFS volume where root is mapped to nobody, this
142 * may need to be world-readable. (This file is read by the daemon which is
145 #define SSH_USER_PERMITTED_KEYS ".ssh/authorized_keys"
148 * Per-user and system-wide ssh "rc" files. These files are executed with
149 * /bin/sh before starting the shell or command if they exist. They will be
150 * passed "proto cookie" as arguments if X11 forwarding with spoofing is in
151 * use. xauth will be run if neither of these exists.
153 #define SSH_USER_RC ".ssh/rc"
154 #define SSH_SYSTEM_RC ETCDIR "/sshrc"
157 * Ssh-only version of /etc/hosts.equiv. Additionally, the daemon may use
158 * ~/.rhosts and /etc/hosts.equiv if rhosts authentication is enabled.
160 #define SSH_HOSTS_EQUIV ETCDIR "/shosts.equiv"
163 * Name of the environment variable containing the pathname of the
164 * authentication socket.
166 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK"
169 * Name of the environment variable containing the pathname of the
170 * authentication socket.
172 #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID"
175 * Default path to ssh-askpass used by ssh-add,
176 * environment variable for overwriting the default location
178 #ifndef SSH_ASKPASS_DEFAULT
179 # define SSH_ASKPASS_DEFAULT "/usr/X11R6/bin/ssh-askpass"
181 #define SSH_ASKPASS_ENV "SSH_ASKPASS"
184 * Force host key length and server key length to differ by at least this
185 * many bits. This is to make double encryption with rsaref work.
187 #define SSH_KEY_BITS_RESERVED 128
190 * Length of the session key in bytes. (Specified as 256 bits in the
193 #define SSH_SESSION_KEY_LENGTH 32
195 /* Name of Kerberos service for SSH to use. */
196 #define KRB4_SERVICE_NAME "rcmd"
199 * Authentication methods. New types can be added, but old types should not
200 * be removed for compatibility. The maximum allowed value is 31.
202 #define SSH_AUTH_RHOSTS 1
203 #define SSH_AUTH_RSA 2
204 #define SSH_AUTH_PASSWORD 3
205 #define SSH_AUTH_RHOSTS_RSA 4
206 #define SSH_AUTH_TIS 5
207 #define SSH_AUTH_KERBEROS 6
208 #define SSH_PASS_KERBEROS_TGT 7
209 /* 8 to 15 are reserved */
210 #define SSH_PASS_AFS_TOKEN 21
212 /* Protocol flags. These are bit masks. */
213 #define SSH_PROTOFLAG_SCREEN_NUMBER 1 /* X11 forwarding includes screen */
214 #define SSH_PROTOFLAG_HOST_IN_FWD_OPEN 2 /* forwarding opens contain host */
217 * Definition of message types. New values can be added, but old values
218 * should not be removed or without careful consideration of the consequences
219 * for compatibility. The maximum value is 254; value 255 is reserved for
222 /* Message name */ /* msg code */ /* arguments */
223 #define SSH_MSG_NONE 0 /* no message */
224 #define SSH_MSG_DISCONNECT 1 /* cause (string) */
225 #define SSH_SMSG_PUBLIC_KEY 2 /* ck,msk,srvk,hostk */
226 #define SSH_CMSG_SESSION_KEY 3 /* key (BIGNUM) */
227 #define SSH_CMSG_USER 4 /* user (string) */
228 #define SSH_CMSG_AUTH_RHOSTS 5 /* user (string) */
229 #define SSH_CMSG_AUTH_RSA 6 /* modulus (BIGNUM) */
230 #define SSH_SMSG_AUTH_RSA_CHALLENGE 7 /* int (BIGNUM) */
231 #define SSH_CMSG_AUTH_RSA_RESPONSE 8 /* int (BIGNUM) */
232 #define SSH_CMSG_AUTH_PASSWORD 9 /* pass (string) */
233 #define SSH_CMSG_REQUEST_PTY 10 /* TERM, tty modes */
234 #define SSH_CMSG_WINDOW_SIZE 11 /* row,col,xpix,ypix */
235 #define SSH_CMSG_EXEC_SHELL 12 /* */
236 #define SSH_CMSG_EXEC_CMD 13 /* cmd (string) */
237 #define SSH_SMSG_SUCCESS 14 /* */
238 #define SSH_SMSG_FAILURE 15 /* */
239 #define SSH_CMSG_STDIN_DATA 16 /* data (string) */
240 #define SSH_SMSG_STDOUT_DATA 17 /* data (string) */
241 #define SSH_SMSG_STDERR_DATA 18 /* data (string) */
242 #define SSH_CMSG_EOF 19 /* */
243 #define SSH_SMSG_EXITSTATUS 20 /* status (int) */
244 #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION 21 /* channel (int) */
245 #define SSH_MSG_CHANNEL_OPEN_FAILURE 22 /* channel (int) */
246 #define SSH_MSG_CHANNEL_DATA 23 /* ch,data (int,str) */
247 #define SSH_MSG_CHANNEL_CLOSE 24 /* channel (int) */
248 #define SSH_MSG_CHANNEL_CLOSE_CONFIRMATION 25 /* channel (int) */
249 /* SSH_CMSG_X11_REQUEST_FORWARDING 26 OBSOLETE */
250 #define SSH_SMSG_X11_OPEN 27 /* channel (int) */
251 #define SSH_CMSG_PORT_FORWARD_REQUEST 28 /* p,host,hp (i,s,i) */
252 #define SSH_MSG_PORT_OPEN 29 /* ch,h,p (i,s,i) */
253 #define SSH_CMSG_AGENT_REQUEST_FORWARDING 30 /* */
254 #define SSH_SMSG_AGENT_OPEN 31 /* port (int) */
255 #define SSH_MSG_IGNORE 32 /* string */
256 #define SSH_CMSG_EXIT_CONFIRMATION 33 /* */
257 #define SSH_CMSG_X11_REQUEST_FORWARDING 34 /* proto,data (s,s) */
258 #define SSH_CMSG_AUTH_RHOSTS_RSA 35 /* user,mod (s,mpi) */
259 #define SSH_MSG_DEBUG 36 /* string */
260 #define SSH_CMSG_REQUEST_COMPRESSION 37 /* level 1-9 (int) */
261 #define SSH_CMSG_MAX_PACKET_SIZE 38 /* size 4k-1024k (int) */
262 #define SSH_CMSG_AUTH_TIS 39 /* we use this for s/key */
263 #define SSH_SMSG_AUTH_TIS_CHALLENGE 40 /* challenge (string) */
264 #define SSH_CMSG_AUTH_TIS_RESPONSE 41 /* response (string) */
265 #define SSH_CMSG_AUTH_KERBEROS 42 /* (KTEXT) */
266 #define SSH_SMSG_AUTH_KERBEROS_RESPONSE 43 /* (KTEXT) */
267 #define SSH_CMSG_HAVE_KERBEROS_TGT 44 /* credentials (s) */
268 #define SSH_CMSG_HAVE_AFS_TOKEN 65 /* token (s) */
270 /*------------ definitions for login.c -------------*/
273 * Returns the time when the user last logged in. Returns 0 if the
274 * information is not available. This must be called before record_login.
275 * The host from which the user logged in is stored in buf.
278 get_last_login_time(uid_t uid, const char *logname,
279 char *buf, unsigned int bufsize);
282 * Records that the user has logged in. This does many things normally done
286 record_login(int pid, const char *ttyname, const char *user, uid_t uid,
287 const char *host, struct sockaddr_in * addr);
290 * Records that the user has logged out. This does many thigs normally done
291 * by login(1) or init.
293 void record_logout(int pid, const char *ttyname);
295 /*------------ definitions for sshconnect.c ----------*/
298 * Opens a TCP/IP connection to the remote server on the given host. If port
299 * is 0, the default port will be used. If anonymous is zero, a privileged
300 * port will be allocated to make the connection. This requires super-user
301 * privileges if anonymous is false. Connection_attempts specifies the
302 * maximum number of tries, one per second. This returns true on success,
303 * and zero on failure. If the connection is successful, this calls
304 * packet_set_connection for the connection.
307 ssh_connect(const char *host, struct sockaddr_in * hostaddr,
308 u_short port, int connection_attempts,
309 int anonymous, uid_t original_real_uid,
310 const char *proxy_command);
313 * Starts a dialog with the server, and authenticates the current user on the
314 * server. This does not need any extra privileges. The basic connection to
315 * the server must already have been established before this is called. If
316 * login fails, this function prints an error and never returns. This
317 * initializes the random state, and leaves it initialized (it will also have
318 * references from the packet module).
322 ssh_login(int host_key_valid, RSA * host_key, const char *host,
323 struct sockaddr_in * hostaddr, uid_t original_real_uid);
325 /*------------ Definitions for various authentication methods. -------*/
328 * Tries to authenticate the user using the .rhosts file. Returns true if
329 * authentication succeeds. If ignore_rhosts is non-zero, this will not
330 * consider .rhosts and .shosts (/etc/hosts.equiv will still be used).
332 int auth_rhosts(struct passwd * pw, const char *client_user);
335 * Tries to authenticate the user using the .rhosts file and the host using
336 * its host key. Returns true if authentication succeeds.
339 auth_rhosts_rsa(struct passwd * pw, const char *client_user,
340 BIGNUM * client_host_key_e, BIGNUM * client_host_key_n);
343 * Tries to authenticate the user using password. Returns true if
344 * authentication succeeds.
346 int auth_password(struct passwd * pw, const char *password);
349 * Performs the RSA authentication dialog with the client. This returns 0 if
350 * the client could not be authenticated, and 1 if authentication was
351 * successful. This may exit if there is a serious protocol violation.
353 int auth_rsa(struct passwd * pw, BIGNUM * client_n);
356 * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer
357 * over the key. Skips any whitespace at the beginning and at end.
359 int auth_rsa_read_key(char **cpp, unsigned int *bitsp, BIGNUM * e, BIGNUM * n);
362 * Returns the name of the machine at the other end of the socket. The
363 * returned string should be freed by the caller.
365 char *get_remote_hostname(int socket);
368 * Return the canonical name of the host in the other side of the current
369 * connection (as returned by packet_get_connection). The host name is
370 * cached, so it is efficient to call this several times.
372 const char *get_canonical_hostname(void);
375 * Returns the remote IP address as an ascii string. The value need not be
376 * freed by the caller.
378 const char *get_remote_ipaddr(void);
380 /* Returns the port number of the peer of the socket. */
381 int get_peer_port(int sock);
383 /* Returns the port number of the remote host. */
384 int get_remote_port(void);
387 * Tries to match the host name (which must be in all lowercase) against the
388 * comma-separated sequence of subpatterns (each possibly preceded by ! to
389 * indicate negation). Returns true if there is a positive match; zero
392 int match_hostname(const char *host, const char *pattern, unsigned int len);
395 * Checks whether the given host is already in the list of our known hosts.
396 * Returns HOST_OK if the host is known and has the specified key, HOST_NEW
397 * if the host is not known, and HOST_CHANGED if the host is known but used
398 * to have a different host key. The host must be in all lowercase.
401 HOST_OK, HOST_NEW, HOST_CHANGED
404 check_host_in_hostfile(const char *filename, const char *host,
405 BIGNUM * e, BIGNUM * n, BIGNUM * ke, BIGNUM * kn);
408 * Appends an entry to the host file. Returns false if the entry could not
412 add_host_to_hostfile(const char *filename, const char *host,
413 BIGNUM * e, BIGNUM * n);
416 * Performs the RSA authentication challenge-response dialog with the client,
417 * and returns true (non-zero) if the client gave the correct answer to our
418 * challenge; returns zero if the client gives a wrong answer.
420 int auth_rsa_challenge_dialog(BIGNUM * e, BIGNUM * n);
423 * Reads a passphrase from /dev/tty with echo turned off. Returns the
424 * passphrase (allocated with xmalloc). Exits if EOF is encountered. If
425 * from_stdin is true, the passphrase will be read from stdin instead.
427 char *read_passphrase(const char *prompt, int from_stdin);
430 * Saves the authentication (private) key in a file, encrypting it with
431 * passphrase. The identification of the file (lowest 64 bits of n) will
432 * precede the key to provide identification of the key without needing a
436 save_private_key(const char *filename, const char *passphrase,
437 RSA * private_key, const char *comment);
440 * Loads the public part of the key file (public key and comment). Returns 0
441 * if an error occurred; zero if the public key was successfully read. The
442 * comment of the key is returned in comment_return if it is non-NULL; the
443 * caller must free the value with xfree.
446 load_public_key(const char *filename, RSA * pub,
447 char **comment_return);
450 * Loads the private key from the file. Returns 0 if an error is encountered
451 * (file does not exist or is not readable, or passphrase is bad). This
452 * initializes the private key. The comment of the key is returned in
453 * comment_return if it is non-NULL; the caller must free the value with
457 load_private_key(const char *filename, const char *passphrase,
458 RSA * private_key, char **comment_return);
460 /*------------ Definitions for logging. -----------------------*/
462 /* Supported syslog facilities and levels. */
464 SYSLOG_FACILITY_DAEMON,
465 SYSLOG_FACILITY_USER,
466 SYSLOG_FACILITY_AUTH,
467 SYSLOG_FACILITY_LOCAL0,
468 SYSLOG_FACILITY_LOCAL1,
469 SYSLOG_FACILITY_LOCAL2,
470 SYSLOG_FACILITY_LOCAL3,
471 SYSLOG_FACILITY_LOCAL4,
472 SYSLOG_FACILITY_LOCAL5,
473 SYSLOG_FACILITY_LOCAL6,
474 SYSLOG_FACILITY_LOCAL7
482 SYSLOG_LEVEL_VERBOSE,
485 /* Initializes logging. */
486 void log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr);
488 /* Logging implementation, depending on server or client */
489 void do_log(LogLevel level, const char *fmt, va_list args);
491 /* name to facility/level */
492 SyslogFacility log_facility_number(char *name);
493 LogLevel log_level_number(char *name);
495 /* Output a message to syslog or stderr */
496 void fatal(const char *fmt,...) __attribute__((format(printf, 1, 2)));
497 void error(const char *fmt,...) __attribute__((format(printf, 1, 2)));
498 void log(const char *fmt,...) __attribute__((format(printf, 1, 2)));
499 void verbose(const char *fmt,...) __attribute__((format(printf, 1, 2)));
500 void debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
502 /* same as fatal() but w/o logging */
503 void fatal_cleanup(void);
506 * Registers a cleanup function to be called by fatal()/fatal_cleanup()
507 * before exiting. It is permissible to call fatal_remove_cleanup for the
508 * function itself from the function.
510 void fatal_add_cleanup(void (*proc) (void *context), void *context);
512 /* Removes a cleanup function to be called at fatal(). */
513 void fatal_remove_cleanup(void (*proc) (void *context), void *context);
515 /*---------------- definitions for channels ------------------*/
517 /* Sets specific protocol options. */
518 void channel_set_options(int hostname_in_open);
521 * Allocate a new channel object and set its type and socket. Remote_name
522 * must have been allocated with xmalloc; this will free it when the channel
525 int channel_allocate(int type, int sock, char *remote_name);
527 /* Free the channel and close its socket. */
528 void channel_free(int channel);
530 /* Add any bits relevant to channels in select bitmasks. */
531 void channel_prepare_select(fd_set * readset, fd_set * writeset);
534 * After select, perform any appropriate operations for channels which have
537 void channel_after_select(fd_set * readset, fd_set * writeset);
539 /* If there is data to send to the connection, send some of it now. */
540 void channel_output_poll(void);
543 * This is called when a packet of type CHANNEL_DATA has just been received.
544 * The message type has already been consumed, but channel number and data is
547 void channel_input_data(int payload_len);
549 /* Returns true if no channel has too much buffered data. */
550 int channel_not_very_much_buffered_data(void);
552 /* This is called after receiving CHANNEL_CLOSE. */
553 void channel_input_close(void);
555 /* This is called after receiving CHANNEL_CLOSE_CONFIRMATION. */
556 void channel_input_close_confirmation(void);
558 /* This is called after receiving CHANNEL_OPEN_CONFIRMATION. */
559 void channel_input_open_confirmation(void);
561 /* This is called after receiving CHANNEL_OPEN_FAILURE from the other side. */
562 void channel_input_open_failure(void);
564 /* This closes any sockets that are listening for connections; this removes
565 any unix domain sockets. */
566 void channel_stop_listening(void);
569 * Closes the sockets of all channels. This is used to close extra file
570 * descriptors after a fork.
572 void channel_close_all(void);
574 /* Returns the maximum file descriptor number used by the channels. */
575 int channel_max_fd(void);
577 /* Returns true if there is still an open channel over the connection. */
578 int channel_still_open(void);
581 * Returns a string containing a list of all open channels. The list is
582 * suitable for displaying to the user. It uses crlf instead of newlines.
583 * The caller should free the string with xfree.
585 char *channel_open_message(void);
588 * Initiate forwarding of connections to local port "port" through the secure
589 * channel to host:port from remote side. This never returns if there was an
593 channel_request_local_forwarding(u_short port, const char *host,
594 u_short remote_port, int gateway_ports);
597 * Initiate forwarding of connections to port "port" on remote host through
598 * the secure channel to host:port from local side. This never returns if
599 * there was an error. This registers that open requests for that port are
603 channel_request_remote_forwarding(u_short port, const char *host,
604 u_short remote_port);
607 * Permits opening to any host/port in SSH_MSG_PORT_OPEN. This is usually
608 * called by the server, because the user could connect to any port anyway,
609 * and the server has no way to know but to trust the client anyway.
611 void channel_permit_all_opens(void);
614 * This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates
615 * listening for the port, and sends back a success reply (or disconnect
616 * message if there was an error). This never returns if there was an error.
618 void channel_input_port_forward_request(int is_root);
621 * This is called after receiving PORT_OPEN message. This attempts to
622 * connect to the given host:port, and sends back CHANNEL_OPEN_CONFIRMATION
623 * or CHANNEL_OPEN_FAILURE.
625 void channel_input_port_open(int payload_len);
628 * Creates a port for X11 connections, and starts listening for it. Returns
629 * the display name, or NULL if an error was encountered.
631 char *x11_create_display(int screen);
634 * Creates an internet domain socket for listening for X11 connections.
635 * Returns a suitable value for the DISPLAY variable, or NULL if an error
638 char *x11_create_display_inet(int screen, int x11_display_offset);
641 * This is called when SSH_SMSG_X11_OPEN is received. The packet contains
642 * the remote channel number. We should do whatever we want, and respond
643 * with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE.
645 void x11_input_open(int payload_len);
648 * Requests forwarding of X11 connections. This should be called on the
651 void x11_request_forwarding(void);
654 * Requests forwarding for X11 connections, with authentication spoofing.
655 * This should be called in the client only.
657 void x11_request_forwarding_with_spoofing(const char *proto, const char *data);
659 /* Sends a message to the server to request authentication fd forwarding. */
660 void auth_request_forwarding(void);
663 * Returns the name of the forwarded authentication socket. Returns NULL if
664 * there is no forwarded authentication socket. The returned value points to
667 char *auth_get_socket_name(void);
670 * This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
671 * This starts forwarding authentication requests.
673 void auth_input_request_forwarding(struct passwd * pw);
675 /* This is called to process an SSH_SMSG_AGENT_OPEN message. */
676 void auth_input_open_request(void);
679 * Returns true if the given string matches the pattern (which may contain ?
680 * and * as wildcards), and zero if it does not match.
682 int match_pattern(const char *s, const char *pattern);
685 * Expands tildes in the file name. Returns data allocated by xmalloc.
686 * Warning: this calls getpw*.
688 char *tilde_expand_filename(const char *filename, uid_t my_uid);
691 * Performs the interactive session. This handles data transmission between
692 * the client and the program. Note that the notion of stdin, stdout, and
693 * stderr in this function is sort of reversed: this function writes to stdin
694 * (of the child program), and reads from stdout and stderr (of the child
697 void server_loop(int pid, int fdin, int fdout, int fderr);
699 /* Client side main loop for the interactive session. */
700 int client_loop(int have_pty, int escape_char);
702 /* Linked list of custom environment strings (see auth-rsa.c). */
704 struct envstring *next;
709 * Ensure all of data on socket comes through. f==read || f==write
711 int atomicio(int (*f)(), int fd, void *s, size_t n);
716 * Performs Kerberos v4 mutual authentication with the client. This returns 0
717 * if the client could not be authenticated, and 1 if authentication was
718 * successful. This may exit if there is a serious protocol violation.
720 int auth_krb4(const char *server_user, KTEXT auth, char **client);
721 int krb4_init(uid_t uid);
722 void krb4_cleanup_proc(void *ignore);
723 int auth_krb4_password(struct passwd * pw, const char *password);
728 /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
729 int auth_kerberos_tgt(struct passwd * pw, const char *string);
730 int auth_afs_token(struct passwd * pw, const char *token_string);
732 int creds_to_radix(CREDENTIALS * creds, unsigned char *buf);
733 int radix_to_creds(const char *buf, CREDENTIALS * creds);
740 char *skey_fake_keyinfo(char *username);
741 int auth_skey_password(struct passwd * pw, const char *password);
745 #include "auth-pam.h"