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 */
29 * The default cipher used if IDEA is not supported by the remote host. It is
30 * recommended that this be one of the mandatory ciphers (DES, 3DES), though
31 * that is not required.
33 #define SSH_FALLBACK_CIPHER SSH_CIPHER_3DES
35 /* Cipher used for encrypting authentication files. */
36 #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES
38 /* Default port number. */
39 #define SSH_DEFAULT_PORT 22
41 /* Maximum number of TCP/IP ports forwarded per direction. */
42 #define SSH_MAX_FORWARDS_PER_DIRECTION 100
45 * Maximum number of RSA authentication identity files that can be specified
46 * in configuration files or on the command line.
48 #define SSH_MAX_IDENTITY_FILES 100
51 * Major protocol version. Different version indicates major incompatiblity
52 * that prevents communication.
54 #define PROTOCOL_MAJOR 1
57 * Minor protocol version. Different version indicates minor incompatibility
58 * that does not prevent interoperation.
60 #define PROTOCOL_MINOR 5
63 * Name for the service. The port named by this service overrides the
64 * default port if present.
66 #define SSH_SERVICE_NAME "ssh"
73 #define PIDDIR "/var/run"
77 * System-wide file containing host keys of known hosts. This file should be
80 #define SSH_SYSTEM_HOSTFILE ETCDIR "/ssh_known_hosts"
83 * Of these, ssh_host_key must be readable only by root, whereas ssh_config
84 * should be world-readable.
86 #define HOST_KEY_FILE ETCDIR "/ssh_host_key"
87 #define SERVER_CONFIG_FILE ETCDIR "/sshd_config"
88 #define HOST_CONFIG_FILE ETCDIR "/ssh_config"
91 #define SSH_PROGRAM "/usr/bin/ssh"
92 #endif /* SSH_PROGRAM */
95 #define LOGIN_PROGRAM "/usr/bin/login"
96 #endif /* LOGIN_PROGRAM */
98 #ifndef ASKPASS_PROGRAM
99 #define ASKPASS_PROGRAM "/usr/lib/ssh/ssh-askpass"
100 #endif /* ASKPASS_PROGRAM */
103 * The process id of the daemon listening for connections is saved here to
104 * make it easier to kill the correct daemon when necessary.
106 #define SSH_DAEMON_PID_FILE PIDDIR "/sshd.pid"
109 * The directory in user\'s home directory in which the files reside. The
110 * directory should be world-readable (though not all files are).
112 #define SSH_USER_DIR ".ssh"
115 * Per-user file containing host keys of known hosts. This file need not be
116 * readable by anyone except the user him/herself, though this does not
117 * contain anything particularly secret.
119 #define SSH_USER_HOSTFILE "~/.ssh/known_hosts"
122 * Name of the default file containing client-side authentication key. This
123 * file should only be readable by the user him/herself.
125 #define SSH_CLIENT_IDENTITY ".ssh/identity"
128 * Configuration file in user\'s home directory. This file need not be
129 * readable by anyone but the user him/herself, but does not contain anything
130 * particularly secret. If the user\'s home directory resides on an NFS
131 * volume where root is mapped to nobody, this may need to be world-readable.
133 #define SSH_USER_CONFFILE ".ssh/config"
136 * File containing a list of those rsa keys that permit logging in as this
137 * user. This file need not be readable by anyone but the user him/herself,
138 * but does not contain anything particularly secret. If the user\'s home
139 * directory resides on an NFS volume where root is mapped to nobody, this
140 * may need to be world-readable. (This file is read by the daemon which is
143 #define SSH_USER_PERMITTED_KEYS ".ssh/authorized_keys"
146 * Per-user and system-wide ssh "rc" files. These files are executed with
147 * /bin/sh before starting the shell or command if they exist. They will be
148 * passed "proto cookie" as arguments if X11 forwarding with spoofing is in
149 * use. xauth will be run if neither of these exists.
151 #define SSH_USER_RC ".ssh/rc"
152 #define SSH_SYSTEM_RC ETCDIR "/sshrc"
155 * Ssh-only version of /etc/hosts.equiv. Additionally, the daemon may use
156 * ~/.rhosts and /etc/hosts.equiv if rhosts authentication is enabled.
158 #define SSH_HOSTS_EQUIV ETCDIR "/shosts.equiv"
161 * Name of the environment variable containing the pathname of the
162 * authentication socket.
164 #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK"
167 * Name of the environment variable containing the pathname of the
168 * authentication socket.
170 #define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID"
173 * Default path to ssh-askpass used by ssh-add,
174 * environment variable for overwriting the default location
176 #ifndef SSH_ASKPASS_DEFAULT
177 # define SSH_ASKPASS_DEFAULT "/usr/X11R6/bin/ssh-askpass"
179 #define SSH_ASKPASS_ENV "SSH_ASKPASS"
182 * Force host key length and server key length to differ by at least this
183 * many bits. This is to make double encryption with rsaref work.
185 #define SSH_KEY_BITS_RESERVED 128
188 * Length of the session key in bytes. (Specified as 256 bits in the
191 #define SSH_SESSION_KEY_LENGTH 32
193 /* Name of Kerberos service for SSH to use. */
194 #define KRB4_SERVICE_NAME "rcmd"
197 * Authentication methods. New types can be added, but old types should not
198 * be removed for compatibility. The maximum allowed value is 31.
200 #define SSH_AUTH_RHOSTS 1
201 #define SSH_AUTH_RSA 2
202 #define SSH_AUTH_PASSWORD 3
203 #define SSH_AUTH_RHOSTS_RSA 4
204 #define SSH_AUTH_TIS 5
205 #define SSH_AUTH_KERBEROS 6
206 #define SSH_PASS_KERBEROS_TGT 7
207 /* 8 to 15 are reserved */
208 #define SSH_PASS_AFS_TOKEN 21
210 /* Protocol flags. These are bit masks. */
211 #define SSH_PROTOFLAG_SCREEN_NUMBER 1 /* X11 forwarding includes screen */
212 #define SSH_PROTOFLAG_HOST_IN_FWD_OPEN 2 /* forwarding opens contain host */
215 * Definition of message types. New values can be added, but old values
216 * should not be removed or without careful consideration of the consequences
217 * for compatibility. The maximum value is 254; value 255 is reserved for
220 /* Message name */ /* msg code */ /* arguments */
221 #define SSH_MSG_NONE 0 /* no message */
222 #define SSH_MSG_DISCONNECT 1 /* cause (string) */
223 #define SSH_SMSG_PUBLIC_KEY 2 /* ck,msk,srvk,hostk */
224 #define SSH_CMSG_SESSION_KEY 3 /* key (BIGNUM) */
225 #define SSH_CMSG_USER 4 /* user (string) */
226 #define SSH_CMSG_AUTH_RHOSTS 5 /* user (string) */
227 #define SSH_CMSG_AUTH_RSA 6 /* modulus (BIGNUM) */
228 #define SSH_SMSG_AUTH_RSA_CHALLENGE 7 /* int (BIGNUM) */
229 #define SSH_CMSG_AUTH_RSA_RESPONSE 8 /* int (BIGNUM) */
230 #define SSH_CMSG_AUTH_PASSWORD 9 /* pass (string) */
231 #define SSH_CMSG_REQUEST_PTY 10 /* TERM, tty modes */
232 #define SSH_CMSG_WINDOW_SIZE 11 /* row,col,xpix,ypix */
233 #define SSH_CMSG_EXEC_SHELL 12 /* */
234 #define SSH_CMSG_EXEC_CMD 13 /* cmd (string) */
235 #define SSH_SMSG_SUCCESS 14 /* */
236 #define SSH_SMSG_FAILURE 15 /* */
237 #define SSH_CMSG_STDIN_DATA 16 /* data (string) */
238 #define SSH_SMSG_STDOUT_DATA 17 /* data (string) */
239 #define SSH_SMSG_STDERR_DATA 18 /* data (string) */
240 #define SSH_CMSG_EOF 19 /* */
241 #define SSH_SMSG_EXITSTATUS 20 /* status (int) */
242 #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION 21 /* channel (int) */
243 #define SSH_MSG_CHANNEL_OPEN_FAILURE 22 /* channel (int) */
244 #define SSH_MSG_CHANNEL_DATA 23 /* ch,data (int,str) */
245 #define SSH_MSG_CHANNEL_CLOSE 24 /* channel (int) */
246 #define SSH_MSG_CHANNEL_CLOSE_CONFIRMATION 25 /* channel (int) */
247 /* SSH_CMSG_X11_REQUEST_FORWARDING 26 OBSOLETE */
248 #define SSH_SMSG_X11_OPEN 27 /* channel (int) */
249 #define SSH_CMSG_PORT_FORWARD_REQUEST 28 /* p,host,hp (i,s,i) */
250 #define SSH_MSG_PORT_OPEN 29 /* ch,h,p (i,s,i) */
251 #define SSH_CMSG_AGENT_REQUEST_FORWARDING 30 /* */
252 #define SSH_SMSG_AGENT_OPEN 31 /* port (int) */
253 #define SSH_MSG_IGNORE 32 /* string */
254 #define SSH_CMSG_EXIT_CONFIRMATION 33 /* */
255 #define SSH_CMSG_X11_REQUEST_FORWARDING 34 /* proto,data (s,s) */
256 #define SSH_CMSG_AUTH_RHOSTS_RSA 35 /* user,mod (s,mpi) */
257 #define SSH_MSG_DEBUG 36 /* string */
258 #define SSH_CMSG_REQUEST_COMPRESSION 37 /* level 1-9 (int) */
259 #define SSH_CMSG_MAX_PACKET_SIZE 38 /* size 4k-1024k (int) */
260 #define SSH_CMSG_AUTH_TIS 39 /* we use this for s/key */
261 #define SSH_SMSG_AUTH_TIS_CHALLENGE 40 /* challenge (string) */
262 #define SSH_CMSG_AUTH_TIS_RESPONSE 41 /* response (string) */
263 #define SSH_CMSG_AUTH_KERBEROS 42 /* (KTEXT) */
264 #define SSH_SMSG_AUTH_KERBEROS_RESPONSE 43 /* (KTEXT) */
265 #define SSH_CMSG_HAVE_KERBEROS_TGT 44 /* credentials (s) */
266 #define SSH_CMSG_HAVE_AFS_TOKEN 65 /* token (s) */
268 /*------------ definitions for login.c -------------*/
271 * Returns the time when the user last logged in. Returns 0 if the
272 * information is not available. This must be called before record_login.
273 * The host from which the user logged in is stored in buf.
276 get_last_login_time(uid_t uid, const char *logname,
277 char *buf, unsigned int bufsize);
280 * Records that the user has logged in. This does many things normally done
284 record_login(int pid, const char *ttyname, const char *user, uid_t uid,
285 const char *host, struct sockaddr_in * addr);
288 * Records that the user has logged out. This does many thigs normally done
289 * by login(1) or init.
291 void record_logout(int pid, const char *ttyname);
293 /*------------ definitions for sshconnect.c ----------*/
296 * Opens a TCP/IP connection to the remote server on the given host. If port
297 * is 0, the default port will be used. If anonymous is zero, a privileged
298 * port will be allocated to make the connection. This requires super-user
299 * privileges if anonymous is false. Connection_attempts specifies the
300 * maximum number of tries, one per second. This returns true on success,
301 * and zero on failure. If the connection is successful, this calls
302 * packet_set_connection for the connection.
305 ssh_connect(const char *host, struct sockaddr_in * hostaddr,
306 u_short port, int connection_attempts,
307 int anonymous, uid_t original_real_uid,
308 const char *proxy_command);
311 * Starts a dialog with the server, and authenticates the current user on the
312 * server. This does not need any extra privileges. The basic connection to
313 * the server must already have been established before this is called. If
314 * login fails, this function prints an error and never returns. This
315 * initializes the random state, and leaves it initialized (it will also have
316 * references from the packet module).
320 ssh_login(int host_key_valid, RSA * host_key, const char *host,
321 struct sockaddr_in * hostaddr, uid_t original_real_uid);
323 /*------------ Definitions for various authentication methods. -------*/
326 * Tries to authenticate the user using the .rhosts file. Returns true if
327 * authentication succeeds. If ignore_rhosts is non-zero, this will not
328 * consider .rhosts and .shosts (/etc/hosts.equiv will still be used).
330 int auth_rhosts(struct passwd * pw, const char *client_user);
333 * Tries to authenticate the user using the .rhosts file and the host using
334 * its host key. Returns true if authentication succeeds.
337 auth_rhosts_rsa(struct passwd * pw, const char *client_user,
338 BIGNUM * client_host_key_e, BIGNUM * client_host_key_n);
341 * Tries to authenticate the user using password. Returns true if
342 * authentication succeeds.
344 int auth_password(struct passwd * pw, const char *password);
347 * Performs the RSA authentication dialog with the client. This returns 0 if
348 * the client could not be authenticated, and 1 if authentication was
349 * successful. This may exit if there is a serious protocol violation.
351 int auth_rsa(struct passwd * pw, BIGNUM * client_n);
354 * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer
355 * over the key. Skips any whitespace at the beginning and at end.
357 int auth_rsa_read_key(char **cpp, unsigned int *bitsp, BIGNUM * e, BIGNUM * n);
360 * Returns the name of the machine at the other end of the socket. The
361 * returned string should be freed by the caller.
363 char *get_remote_hostname(int socket);
366 * Return the canonical name of the host in the other side of the current
367 * connection (as returned by packet_get_connection). The host name is
368 * cached, so it is efficient to call this several times.
370 const char *get_canonical_hostname(void);
373 * Returns the remote IP address as an ascii string. The value need not be
374 * freed by the caller.
376 const char *get_remote_ipaddr(void);
378 /* Returns the port number of the peer of the socket. */
379 int get_peer_port(int sock);
381 /* Returns the port number of the remote host. */
382 int get_remote_port(void);
385 * Tries to match the host name (which must be in all lowercase) against the
386 * comma-separated sequence of subpatterns (each possibly preceded by ! to
387 * indicate negation). Returns true if there is a positive match; zero
390 int match_hostname(const char *host, const char *pattern, unsigned int len);
393 * Checks whether the given host is already in the list of our known hosts.
394 * Returns HOST_OK if the host is known and has the specified key, HOST_NEW
395 * if the host is not known, and HOST_CHANGED if the host is known but used
396 * to have a different host key. The host must be in all lowercase.
399 HOST_OK, HOST_NEW, HOST_CHANGED
402 check_host_in_hostfile(const char *filename, const char *host,
403 BIGNUM * e, BIGNUM * n, BIGNUM * ke, BIGNUM * kn);
406 * Appends an entry to the host file. Returns false if the entry could not
410 add_host_to_hostfile(const char *filename, const char *host,
411 BIGNUM * e, BIGNUM * n);
414 * Performs the RSA authentication challenge-response dialog with the client,
415 * and returns true (non-zero) if the client gave the correct answer to our
416 * challenge; returns zero if the client gives a wrong answer.
418 int auth_rsa_challenge_dialog(BIGNUM * e, BIGNUM * n);
421 * Reads a passphrase from /dev/tty with echo turned off. Returns the
422 * passphrase (allocated with xmalloc). Exits if EOF is encountered. If
423 * from_stdin is true, the passphrase will be read from stdin instead.
425 char *read_passphrase(const char *prompt, int from_stdin);
428 * Saves the authentication (private) key in a file, encrypting it with
429 * passphrase. The identification of the file (lowest 64 bits of n) will
430 * precede the key to provide identification of the key without needing a
434 save_private_key(const char *filename, const char *passphrase,
435 RSA * private_key, const char *comment);
438 * Loads the public part of the key file (public key and comment). Returns 0
439 * if an error occurred; zero if the public key was successfully read. The
440 * comment of the key is returned in comment_return if it is non-NULL; the
441 * caller must free the value with xfree.
444 load_public_key(const char *filename, RSA * pub,
445 char **comment_return);
448 * Loads the private key from the file. Returns 0 if an error is encountered
449 * (file does not exist or is not readable, or passphrase is bad). This
450 * initializes the private key. The comment of the key is returned in
451 * comment_return if it is non-NULL; the caller must free the value with
455 load_private_key(const char *filename, const char *passphrase,
456 RSA * private_key, char **comment_return);
458 /*------------ Definitions for logging. -----------------------*/
460 /* Supported syslog facilities and levels. */
462 SYSLOG_FACILITY_DAEMON,
463 SYSLOG_FACILITY_USER,
464 SYSLOG_FACILITY_AUTH,
465 SYSLOG_FACILITY_LOCAL0,
466 SYSLOG_FACILITY_LOCAL1,
467 SYSLOG_FACILITY_LOCAL2,
468 SYSLOG_FACILITY_LOCAL3,
469 SYSLOG_FACILITY_LOCAL4,
470 SYSLOG_FACILITY_LOCAL5,
471 SYSLOG_FACILITY_LOCAL6,
472 SYSLOG_FACILITY_LOCAL7
480 SYSLOG_LEVEL_VERBOSE,
483 /* Initializes logging. */
484 void log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr);
486 /* Logging implementation, depending on server or client */
487 void do_log(LogLevel level, const char *fmt, va_list args);
489 /* name to facility/level */
490 SyslogFacility log_facility_number(char *name);
491 LogLevel log_level_number(char *name);
493 /* Output a message to syslog or stderr */
494 void fatal(const char *fmt,...) __attribute__((format(printf, 1, 2)));
495 void error(const char *fmt,...) __attribute__((format(printf, 1, 2)));
496 void log(const char *fmt,...) __attribute__((format(printf, 1, 2)));
497 void verbose(const char *fmt,...) __attribute__((format(printf, 1, 2)));
498 void debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
500 /* same as fatal() but w/o logging */
501 void fatal_cleanup(void);
504 * Registers a cleanup function to be called by fatal()/fatal_cleanup()
505 * before exiting. It is permissible to call fatal_remove_cleanup for the
506 * function itself from the function.
508 void fatal_add_cleanup(void (*proc) (void *context), void *context);
510 /* Removes a cleanup function to be called at fatal(). */
511 void fatal_remove_cleanup(void (*proc) (void *context), void *context);
513 /*---------------- definitions for channels ------------------*/
515 /* Sets specific protocol options. */
516 void channel_set_options(int hostname_in_open);
519 * Allocate a new channel object and set its type and socket. Remote_name
520 * must have been allocated with xmalloc; this will free it when the channel
523 int channel_allocate(int type, int sock, char *remote_name);
525 /* Free the channel and close its socket. */
526 void channel_free(int channel);
528 /* Add any bits relevant to channels in select bitmasks. */
529 void channel_prepare_select(fd_set * readset, fd_set * writeset);
532 * After select, perform any appropriate operations for channels which have
535 void channel_after_select(fd_set * readset, fd_set * writeset);
537 /* If there is data to send to the connection, send some of it now. */
538 void channel_output_poll(void);
541 * This is called when a packet of type CHANNEL_DATA has just been received.
542 * The message type has already been consumed, but channel number and data is
545 void channel_input_data(int payload_len);
547 /* Returns true if no channel has too much buffered data. */
548 int channel_not_very_much_buffered_data(void);
550 /* This is called after receiving CHANNEL_CLOSE. */
551 void channel_input_close(void);
553 /* This is called after receiving CHANNEL_CLOSE_CONFIRMATION. */
554 void channel_input_close_confirmation(void);
556 /* This is called after receiving CHANNEL_OPEN_CONFIRMATION. */
557 void channel_input_open_confirmation(void);
559 /* This is called after receiving CHANNEL_OPEN_FAILURE from the other side. */
560 void channel_input_open_failure(void);
562 /* This closes any sockets that are listening for connections; this removes
563 any unix domain sockets. */
564 void channel_stop_listening(void);
567 * Closes the sockets of all channels. This is used to close extra file
568 * descriptors after a fork.
570 void channel_close_all(void);
572 /* Returns the maximum file descriptor number used by the channels. */
573 int channel_max_fd(void);
575 /* Returns true if there is still an open channel over the connection. */
576 int channel_still_open(void);
579 * Returns a string containing a list of all open channels. The list is
580 * suitable for displaying to the user. It uses crlf instead of newlines.
581 * The caller should free the string with xfree.
583 char *channel_open_message(void);
586 * Initiate forwarding of connections to local port "port" through the secure
587 * channel to host:port from remote side. This never returns if there was an
591 channel_request_local_forwarding(u_short port, const char *host,
592 u_short remote_port, int gateway_ports);
595 * Initiate forwarding of connections to port "port" on remote host through
596 * the secure channel to host:port from local side. This never returns if
597 * there was an error. This registers that open requests for that port are
601 channel_request_remote_forwarding(u_short port, const char *host,
602 u_short remote_port);
605 * Permits opening to any host/port in SSH_MSG_PORT_OPEN. This is usually
606 * called by the server, because the user could connect to any port anyway,
607 * and the server has no way to know but to trust the client anyway.
609 void channel_permit_all_opens(void);
612 * This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates
613 * listening for the port, and sends back a success reply (or disconnect
614 * message if there was an error). This never returns if there was an error.
616 void channel_input_port_forward_request(int is_root);
619 * This is called after receiving PORT_OPEN message. This attempts to
620 * connect to the given host:port, and sends back CHANNEL_OPEN_CONFIRMATION
621 * or CHANNEL_OPEN_FAILURE.
623 void channel_input_port_open(int payload_len);
626 * Creates a port for X11 connections, and starts listening for it. Returns
627 * the display name, or NULL if an error was encountered.
629 char *x11_create_display(int screen);
632 * Creates an internet domain socket for listening for X11 connections.
633 * Returns a suitable value for the DISPLAY variable, or NULL if an error
636 char *x11_create_display_inet(int screen, int x11_display_offset);
639 * This is called when SSH_SMSG_X11_OPEN is received. The packet contains
640 * the remote channel number. We should do whatever we want, and respond
641 * with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE.
643 void x11_input_open(int payload_len);
646 * Requests forwarding of X11 connections. This should be called on the
649 void x11_request_forwarding(void);
652 * Requests forwarding for X11 connections, with authentication spoofing.
653 * This should be called in the client only.
655 void x11_request_forwarding_with_spoofing(const char *proto, const char *data);
657 /* Sends a message to the server to request authentication fd forwarding. */
658 void auth_request_forwarding(void);
661 * Returns the name of the forwarded authentication socket. Returns NULL if
662 * there is no forwarded authentication socket. The returned value points to
665 char *auth_get_socket_name(void);
668 * This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
669 * This starts forwarding authentication requests.
671 void auth_input_request_forwarding(struct passwd * pw);
673 /* This is called to process an SSH_SMSG_AGENT_OPEN message. */
674 void auth_input_open_request(void);
677 * Returns true if the given string matches the pattern (which may contain ?
678 * and * as wildcards), and zero if it does not match.
680 int match_pattern(const char *s, const char *pattern);
683 * Expands tildes in the file name. Returns data allocated by xmalloc.
684 * Warning: this calls getpw*.
686 char *tilde_expand_filename(const char *filename, uid_t my_uid);
689 * Performs the interactive session. This handles data transmission between
690 * the client and the program. Note that the notion of stdin, stdout, and
691 * stderr in this function is sort of reversed: this function writes to stdin
692 * (of the child program), and reads from stdout and stderr (of the child
695 void server_loop(int pid, int fdin, int fdout, int fderr);
697 /* Client side main loop for the interactive session. */
698 int client_loop(int have_pty, int escape_char);
700 /* Linked list of custom environment strings (see auth-rsa.c). */
702 struct envstring *next;
707 * Ensure all of data on socket comes through. f==read || f==write
709 int atomicio(int (*f)(), int fd, void *s, size_t n);
714 * Performs Kerberos v4 mutual authentication with the client. This returns 0
715 * if the client could not be authenticated, and 1 if authentication was
716 * successful. This may exit if there is a serious protocol violation.
718 int auth_krb4(const char *server_user, KTEXT auth, char **client);
719 int krb4_init(uid_t uid);
720 void krb4_cleanup_proc(void *ignore);
721 int auth_krb4_password(struct passwd * pw, const char *password);
726 /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
727 int auth_kerberos_tgt(struct passwd * pw, const char *string);
728 int auth_afs_token(struct passwd * pw, const char *token_string);
730 int creds_to_radix(CREDENTIALS * creds, unsigned char *buf);
731 int radix_to_creds(const char *buf, CREDENTIALS * creds);
738 char *skey_fake_keyinfo(char *username);
739 int auth_skey_password(struct passwd * pw, const char *password);