[BACK]Return to ssh.h CVS log [TXT][DIR] Up to [local] / src / usr.bin / ssh

Annotation of src/usr.bin/ssh/ssh.h, Revision 1.56

1.1       deraadt     1: /*
1.25      deraadt     2:  * Author: Tatu Ylonen <ylo@cs.hut.fi>
                      3:  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
                      4:  *                    All rights reserved
1.38      markus      5:  *
1.25      deraadt     6:  * Generic header file for ssh.
1.38      markus      7:  *
1.50      deraadt     8:  * As far as I am concerned, the code I have written for this software
                      9:  * can be used freely for any purpose.  Any derived versions of this
                     10:  * software must be clearly marked as such, and if the derived work is
                     11:  * incompatible with the protocol description in the RFC file, it must be
                     12:  * called by a name other than "ssh" or "Secure Shell".
1.25      deraadt    13:  */
1.1       deraadt    14:
1.56    ! markus     15: /* RCSID("$OpenBSD: ssh.h,v 1.55 2000/11/25 17:19:33 markus Exp $"); */
1.1       deraadt    16:
                     17: #ifndef SSH_H
                     18: #define SSH_H
                     19:
                     20: #include "rsa.h"
                     21: #include "cipher.h"
                     22:
                     23: /* Cipher used for encrypting authentication files. */
                     24: #define SSH_AUTHFILE_CIPHER    SSH_CIPHER_3DES
                     25:
                     26: /* Default port number. */
                     27: #define SSH_DEFAULT_PORT       22
                     28:
                     29: /* Maximum number of TCP/IP ports forwarded per direction. */
                     30: #define SSH_MAX_FORWARDS_PER_DIRECTION 100
                     31:
1.26      markus     32: /*
                     33:  * Maximum number of RSA authentication identity files that can be specified
                     34:  * in configuration files or on the command line.
                     35:  */
1.1       deraadt    36: #define SSH_MAX_IDENTITY_FILES         100
                     37:
1.26      markus     38: /*
                     39:  * Major protocol version.  Different version indicates major incompatiblity
                     40:  * that prevents communication.
1.37      markus     41:  *
1.26      markus     42:  * Minor protocol version.  Different version indicates minor incompatibility
                     43:  * that does not prevent interoperation.
                     44:  */
1.37      markus     45: #define PROTOCOL_MAJOR_1       1
                     46: #define PROTOCOL_MINOR_1       5
                     47:
                     48: /* We support both SSH1 and SSH2 */
                     49: #define PROTOCOL_MAJOR_2       2
                     50: #define PROTOCOL_MINOR_2       0
1.1       deraadt    51:
1.26      markus     52: /*
                     53:  * Name for the service.  The port named by this service overrides the
                     54:  * default port if present.
                     55:  */
1.1       deraadt    56: #define SSH_SERVICE_NAME       "ssh"
                     57:
1.2       deraadt    58: #define ETCDIR                 "/etc"
                     59: #define PIDDIR                 "/var/run"
                     60:
1.26      markus     61: /*
                     62:  * System-wide file containing host keys of known hosts.  This file should be
                     63:  * world-readable.
                     64:  */
1.1       deraadt    65: #define SSH_SYSTEM_HOSTFILE    ETCDIR "/ssh_known_hosts"
1.40      markus     66: #define SSH_SYSTEM_HOSTFILE2   ETCDIR "/ssh_known_hosts2"
1.1       deraadt    67:
1.26      markus     68: /*
                     69:  * Of these, ssh_host_key must be readable only by root, whereas ssh_config
                     70:  * should be world-readable.
                     71:  */
                     72: #define HOST_KEY_FILE          ETCDIR "/ssh_host_key"
                     73: #define SERVER_CONFIG_FILE     ETCDIR "/sshd_config"
                     74: #define HOST_CONFIG_FILE       ETCDIR "/ssh_config"
1.43      markus     75: #define HOST_DSA_KEY_FILE      ETCDIR "/ssh_host_dsa_key"
1.52      provos     76: #define DH_PRIMES              ETCDIR "/primes"
1.2       deraadt    77:
                     78: #define SSH_PROGRAM            "/usr/bin/ssh"
1.1       deraadt    79:
1.26      markus     80: /*
                     81:  * The process id of the daemon listening for connections is saved here to
                     82:  * make it easier to kill the correct daemon when necessary.
                     83:  */
1.1       deraadt    84: #define SSH_DAEMON_PID_FILE    PIDDIR "/sshd.pid"
                     85:
1.26      markus     86: /*
                     87:  * The directory in user\'s home directory in which the files reside. The
                     88:  * directory should be world-readable (though not all files are).
                     89:  */
1.1       deraadt    90: #define SSH_USER_DIR           ".ssh"
                     91:
1.26      markus     92: /*
                     93:  * Per-user file containing host keys of known hosts.  This file need not be
                     94:  * readable by anyone except the user him/herself, though this does not
                     95:  * contain anything particularly secret.
                     96:  */
1.1       deraadt    97: #define SSH_USER_HOSTFILE      "~/.ssh/known_hosts"
1.40      markus     98: #define SSH_USER_HOSTFILE2     "~/.ssh/known_hosts2"
1.1       deraadt    99:
1.26      markus    100: /*
                    101:  * Name of the default file containing client-side authentication key. This
                    102:  * file should only be readable by the user him/herself.
                    103:  */
1.1       deraadt   104: #define SSH_CLIENT_IDENTITY    ".ssh/identity"
1.42      markus    105: #define SSH_CLIENT_ID_DSA      ".ssh/id_dsa"
1.55      markus    106: #define SSH_CLIENT_ID_RSA      ".ssh/id_rsa"
1.1       deraadt   107:
1.26      markus    108: /*
                    109:  * Configuration file in user\'s home directory.  This file need not be
                    110:  * readable by anyone but the user him/herself, but does not contain anything
                    111:  * particularly secret.  If the user\'s home directory resides on an NFS
                    112:  * volume where root is mapped to nobody, this may need to be world-readable.
                    113:  */
1.1       deraadt   114: #define SSH_USER_CONFFILE      ".ssh/config"
                    115:
1.26      markus    116: /*
                    117:  * File containing a list of those rsa keys that permit logging in as this
                    118:  * user.  This file need not be readable by anyone but the user him/herself,
                    119:  * but does not contain anything particularly secret.  If the user\'s home
                    120:  * directory resides on an NFS volume where root is mapped to nobody, this
                    121:  * may need to be world-readable.  (This file is read by the daemon which is
                    122:  * running as root.)
                    123:  */
1.1       deraadt   124: #define SSH_USER_PERMITTED_KEYS        ".ssh/authorized_keys"
1.40      markus    125: #define SSH_USER_PERMITTED_KEYS2       ".ssh/authorized_keys2"
1.1       deraadt   126:
1.26      markus    127: /*
                    128:  * Per-user and system-wide ssh "rc" files.  These files are executed with
                    129:  * /bin/sh before starting the shell or command if they exist.  They will be
                    130:  * passed "proto cookie" as arguments if X11 forwarding with spoofing is in
                    131:  * use.  xauth will be run if neither of these exists.
                    132:  */
1.1       deraadt   133: #define SSH_USER_RC            ".ssh/rc"
                    134: #define SSH_SYSTEM_RC          ETCDIR "/sshrc"
                    135:
1.26      markus    136: /*
                    137:  * Ssh-only version of /etc/hosts.equiv.  Additionally, the daemon may use
                    138:  * ~/.rhosts and /etc/hosts.equiv if rhosts authentication is enabled.
                    139:  */
1.1       deraadt   140: #define SSH_HOSTS_EQUIV                ETCDIR "/shosts.equiv"
                    141:
1.26      markus    142: /*
                    143:  * Name of the environment variable containing the pathname of the
                    144:  * authentication socket.
                    145:  */
1.13      markus    146: #define SSH_AUTHSOCKET_ENV_NAME        "SSH_AUTH_SOCK"
1.15      markus    147:
1.26      markus    148: /*
                    149:  * Name of the environment variable containing the pathname of the
                    150:  * authentication socket.
                    151:  */
1.15      markus    152: #define SSH_AGENTPID_ENV_NAME  "SSH_AGENT_PID"
1.29      markus    153:
                    154: /*
                    155:  * Default path to ssh-askpass used by ssh-add,
                    156:  * environment variable for overwriting the default location
                    157:  */
                    158: #define SSH_ASKPASS_DEFAULT    "/usr/X11R6/bin/ssh-askpass"
                    159: #define SSH_ASKPASS_ENV                "SSH_ASKPASS"
1.1       deraadt   160:
1.26      markus    161: /*
                    162:  * Force host key length and server key length to differ by at least this
                    163:  * many bits.  This is to make double encryption with rsaref work.
                    164:  */
1.1       deraadt   165: #define SSH_KEY_BITS_RESERVED          128
                    166:
1.26      markus    167: /*
                    168:  * Length of the session key in bytes.  (Specified as 256 bits in the
                    169:  * protocol.)
                    170:  */
1.1       deraadt   171: #define SSH_SESSION_KEY_LENGTH         32
                    172:
                    173: /* Name of Kerberos service for SSH to use. */
                    174: #define KRB4_SERVICE_NAME              "rcmd"
                    175:
1.26      markus    176: /*
                    177:  * Authentication methods.  New types can be added, but old types should not
                    178:  * be removed for compatibility.  The maximum allowed value is 31.
                    179:  */
1.1       deraadt   180: #define SSH_AUTH_RHOSTS                1
                    181: #define SSH_AUTH_RSA           2
                    182: #define SSH_AUTH_PASSWORD      3
                    183: #define SSH_AUTH_RHOSTS_RSA    4
1.24      markus    184: #define SSH_AUTH_TIS           5
1.1       deraadt   185: #define SSH_AUTH_KERBEROS      6
                    186: #define SSH_PASS_KERBEROS_TGT  7
1.26      markus    187:                                /* 8 to 15 are reserved */
1.1       deraadt   188: #define SSH_PASS_AFS_TOKEN     21
                    189:
                    190: /* Protocol flags.  These are bit masks. */
1.26      markus    191: #define SSH_PROTOFLAG_SCREEN_NUMBER    1       /* X11 forwarding includes screen */
                    192: #define SSH_PROTOFLAG_HOST_IN_FWD_OPEN 2       /* forwarding opens contain host */
                    193:
                    194: /*
                    195:  * Definition of message types.  New values can be added, but old values
                    196:  * should not be removed or without careful consideration of the consequences
                    197:  * for compatibility.  The maximum value is 254; value 255 is reserved for
                    198:  * future extension.
                    199:  */
                    200: /* Message name */                     /* msg code */  /* arguments */
1.1       deraadt   201: #define SSH_MSG_NONE                           0       /* no message */
                    202: #define SSH_MSG_DISCONNECT                     1       /* cause (string) */
                    203: #define SSH_SMSG_PUBLIC_KEY                    2       /* ck,msk,srvk,hostk */
1.3       provos    204: #define SSH_CMSG_SESSION_KEY                   3       /* key (BIGNUM) */
1.1       deraadt   205: #define SSH_CMSG_USER                          4       /* user (string) */
                    206: #define SSH_CMSG_AUTH_RHOSTS                   5       /* user (string) */
1.3       provos    207: #define SSH_CMSG_AUTH_RSA                      6       /* modulus (BIGNUM) */
                    208: #define SSH_SMSG_AUTH_RSA_CHALLENGE            7       /* int (BIGNUM) */
                    209: #define SSH_CMSG_AUTH_RSA_RESPONSE             8       /* int (BIGNUM) */
1.1       deraadt   210: #define SSH_CMSG_AUTH_PASSWORD                 9       /* pass (string) */
                    211: #define SSH_CMSG_REQUEST_PTY                   10      /* TERM, tty modes */
                    212: #define SSH_CMSG_WINDOW_SIZE                   11      /* row,col,xpix,ypix */
                    213: #define SSH_CMSG_EXEC_SHELL                    12      /* */
                    214: #define SSH_CMSG_EXEC_CMD                      13      /* cmd (string) */
                    215: #define SSH_SMSG_SUCCESS                       14      /* */
                    216: #define SSH_SMSG_FAILURE                       15      /* */
                    217: #define SSH_CMSG_STDIN_DATA                    16      /* data (string) */
                    218: #define SSH_SMSG_STDOUT_DATA                   17      /* data (string) */
                    219: #define SSH_SMSG_STDERR_DATA                   18      /* data (string) */
                    220: #define SSH_CMSG_EOF                           19      /* */
                    221: #define SSH_SMSG_EXITSTATUS                    20      /* status (int) */
                    222: #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION      21      /* channel (int) */
                    223: #define SSH_MSG_CHANNEL_OPEN_FAILURE           22      /* channel (int) */
                    224: #define SSH_MSG_CHANNEL_DATA                   23      /* ch,data (int,str) */
                    225: #define SSH_MSG_CHANNEL_CLOSE                  24      /* channel (int) */
                    226: #define SSH_MSG_CHANNEL_CLOSE_CONFIRMATION     25      /* channel (int) */
                    227: /*      SSH_CMSG_X11_REQUEST_FORWARDING         26         OBSOLETE */
                    228: #define SSH_SMSG_X11_OPEN                      27      /* channel (int) */
                    229: #define SSH_CMSG_PORT_FORWARD_REQUEST          28      /* p,host,hp (i,s,i) */
                    230: #define SSH_MSG_PORT_OPEN                      29      /* ch,h,p (i,s,i) */
                    231: #define SSH_CMSG_AGENT_REQUEST_FORWARDING      30      /* */
                    232: #define SSH_SMSG_AGENT_OPEN                    31      /* port (int) */
                    233: #define SSH_MSG_IGNORE                         32      /* string */
                    234: #define SSH_CMSG_EXIT_CONFIRMATION             33      /* */
                    235: #define SSH_CMSG_X11_REQUEST_FORWARDING                34      /* proto,data (s,s) */
                    236: #define SSH_CMSG_AUTH_RHOSTS_RSA               35      /* user,mod (s,mpi) */
                    237: #define SSH_MSG_DEBUG                          36      /* string */
                    238: #define SSH_CMSG_REQUEST_COMPRESSION           37      /* level 1-9 (int) */
1.13      markus    239: #define SSH_CMSG_MAX_PACKET_SIZE               38      /* size 4k-1024k (int) */
1.24      markus    240: #define SSH_CMSG_AUTH_TIS                      39      /* we use this for s/key */
                    241: #define SSH_SMSG_AUTH_TIS_CHALLENGE            40      /* challenge (string) */
                    242: #define SSH_CMSG_AUTH_TIS_RESPONSE             41      /* response (string) */
1.1       deraadt   243: #define SSH_CMSG_AUTH_KERBEROS                 42      /* (KTEXT) */
                    244: #define SSH_SMSG_AUTH_KERBEROS_RESPONSE                43      /* (KTEXT) */
                    245: #define SSH_CMSG_HAVE_KERBEROS_TGT             44      /* credentials (s) */
                    246: #define SSH_CMSG_HAVE_AFS_TOKEN                        65      /* token (s) */
                    247:
                    248: /*------------ definitions for login.c -------------*/
                    249:
1.26      markus    250: /*
                    251:  * Returns the time when the user last logged in.  Returns 0 if the
                    252:  * information is not available.  This must be called before record_login.
                    253:  * The host from which the user logged in is stored in buf.
                    254:  */
1.56    ! markus    255: u_long
1.25      deraadt   256: get_last_login_time(uid_t uid, const char *logname,
1.56    ! markus    257:     char *buf, u_int bufsize);
1.1       deraadt   258:
1.26      markus    259: /*
                    260:  * Records that the user has logged in.  This does many things normally done
                    261:  * by login(1).
                    262:  */
1.38      markus    263: void
1.39      deraadt   264: record_login(pid_t pid, const char *ttyname, const char *user, uid_t uid,
1.32      markus    265:     const char *host, struct sockaddr *addr);
1.1       deraadt   266:
1.26      markus    267: /*
                    268:  * Records that the user has logged out.  This does many thigs normally done
                    269:  * by login(1) or init.
                    270:  */
1.39      deraadt   271: void    record_logout(pid_t pid, const char *ttyname);
1.1       deraadt   272:
                    273: /*------------ definitions for sshconnect.c ----------*/
                    274:
1.26      markus    275: /*
                    276:  * Opens a TCP/IP connection to the remote server on the given host.  If port
                    277:  * is 0, the default port will be used.  If anonymous is zero, a privileged
                    278:  * port will be allocated to make the connection. This requires super-user
                    279:  * privileges if anonymous is false. Connection_attempts specifies the
                    280:  * maximum number of tries, one per second.  This returns true on success,
                    281:  * and zero on failure.  If the connection is successful, this calls
                    282:  * packet_set_connection for the connection.
                    283:  */
1.38      markus    284: int
1.32      markus    285: ssh_connect(const char *host, struct sockaddr_storage * hostaddr,
1.27      markus    286:     u_short port, int connection_attempts,
1.25      deraadt   287:     int anonymous, uid_t original_real_uid,
                    288:     const char *proxy_command);
1.1       deraadt   289:
1.26      markus    290: /*
                    291:  * Starts a dialog with the server, and authenticates the current user on the
                    292:  * server.  This does not need any extra privileges.  The basic connection to
                    293:  * the server must already have been established before this is called. If
                    294:  * login fails, this function prints an error and never returns. This
                    295:  * initializes the random state, and leaves it initialized (it will also have
                    296:  * references from the packet module).
                    297:  */
1.18      markus    298:
1.38      markus    299: void
1.25      deraadt   300: ssh_login(int host_key_valid, RSA * host_key, const char *host,
1.32      markus    301:     struct sockaddr * hostaddr, uid_t original_real_uid);
1.1       deraadt   302:
                    303: /*------------ Definitions for various authentication methods. -------*/
                    304:
1.26      markus    305: /*
                    306:  * Tries to authenticate the user using the .rhosts file.  Returns true if
                    307:  * authentication succeeds.  If ignore_rhosts is non-zero, this will not
                    308:  * consider .rhosts and .shosts (/etc/hosts.equiv will still be used).
                    309:  */
1.25      deraadt   310: int     auth_rhosts(struct passwd * pw, const char *client_user);
1.1       deraadt   311:
1.26      markus    312: /*
                    313:  * Tries to authenticate the user using the .rhosts file and the host using
                    314:  * its host key.  Returns true if authentication succeeds.
                    315:  */
1.38      markus    316: int
1.34      markus    317: auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key);
1.1       deraadt   318:
1.26      markus    319: /*
                    320:  * Tries to authenticate the user using password.  Returns true if
                    321:  * authentication succeeds.
                    322:  */
1.25      deraadt   323: int     auth_password(struct passwd * pw, const char *password);
1.1       deraadt   324:
1.26      markus    325: /*
                    326:  * Performs the RSA authentication dialog with the client.  This returns 0 if
                    327:  * the client could not be authenticated, and 1 if authentication was
                    328:  * successful.  This may exit if there is a serious protocol violation.
                    329:  */
1.25      deraadt   330: int     auth_rsa(struct passwd * pw, BIGNUM * client_n);
1.1       deraadt   331:
1.26      markus    332: /*
                    333:  * Parses an RSA key (number of bits, e, n) from a string.  Moves the pointer
                    334:  * over the key.  Skips any whitespace at the beginning and at end.
                    335:  */
1.56    ! markus    336: int     auth_rsa_read_key(char **cpp, u_int *bitsp, BIGNUM * e, BIGNUM * n);
1.1       deraadt   337:
1.26      markus    338: /*
                    339:  * Returns the name of the machine at the other end of the socket.  The
                    340:  * returned string should be freed by the caller.
                    341:  */
1.25      deraadt   342: char   *get_remote_hostname(int socket);
1.1       deraadt   343:
1.26      markus    344: /*
                    345:  * Return the canonical name of the host in the other side of the current
                    346:  * connection (as returned by packet_get_connection).  The host name is
                    347:  * cached, so it is efficient to call this several times.
                    348:  */
1.1       deraadt   349: const char *get_canonical_hostname(void);
                    350:
1.26      markus    351: /*
                    352:  * Returns the remote IP address as an ascii string.  The value need not be
                    353:  * freed by the caller.
                    354:  */
1.1       deraadt   355: const char *get_remote_ipaddr(void);
                    356:
                    357: /* Returns the port number of the peer of the socket. */
1.25      deraadt   358: int     get_peer_port(int sock);
1.1       deraadt   359:
1.32      markus    360: /* Returns the port number of the remote/local host. */
1.25      deraadt   361: int     get_remote_port(void);
1.32      markus    362: int    get_local_port(void);
                    363:
1.1       deraadt   364:
1.26      markus    365: /*
                    366:  * Performs the RSA authentication challenge-response dialog with the client,
                    367:  * and returns true (non-zero) if the client gave the correct answer to our
                    368:  * challenge; returns zero if the client gives a wrong answer.
                    369:  */
1.34      markus    370: int     auth_rsa_challenge_dialog(RSA *pk);
1.1       deraadt   371:
1.26      markus    372: /*
                    373:  * Reads a passphrase from /dev/tty with echo turned off.  Returns the
                    374:  * passphrase (allocated with xmalloc).  Exits if EOF is encountered. If
                    375:  * from_stdin is true, the passphrase will be read from stdin instead.
                    376:  */
1.53      markus    377: char   *read_passphrase(char *prompt, int from_stdin);
1.1       deraadt   378:
1.20      markus    379:
                    380: /*------------ Definitions for logging. -----------------------*/
                    381:
                    382: /* Supported syslog facilities and levels. */
1.25      deraadt   383: typedef enum {
                    384:        SYSLOG_FACILITY_DAEMON,
                    385:        SYSLOG_FACILITY_USER,
                    386:        SYSLOG_FACILITY_AUTH,
                    387:        SYSLOG_FACILITY_LOCAL0,
                    388:        SYSLOG_FACILITY_LOCAL1,
                    389:        SYSLOG_FACILITY_LOCAL2,
                    390:        SYSLOG_FACILITY_LOCAL3,
                    391:        SYSLOG_FACILITY_LOCAL4,
                    392:        SYSLOG_FACILITY_LOCAL5,
                    393:        SYSLOG_FACILITY_LOCAL6,
                    394:        SYSLOG_FACILITY_LOCAL7
                    395: }       SyslogFacility;
                    396:
                    397: typedef enum {
                    398:        SYSLOG_LEVEL_QUIET,
                    399:        SYSLOG_LEVEL_FATAL,
                    400:        SYSLOG_LEVEL_ERROR,
                    401:        SYSLOG_LEVEL_INFO,
                    402:        SYSLOG_LEVEL_VERBOSE,
1.51      markus    403:        SYSLOG_LEVEL_DEBUG1,
                    404:        SYSLOG_LEVEL_DEBUG2,
                    405:        SYSLOG_LEVEL_DEBUG3
1.25      deraadt   406: }       LogLevel;
1.20      markus    407: /* Initializes logging. */
1.25      deraadt   408: void    log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr);
1.20      markus    409:
                    410: /* Logging implementation, depending on server or client */
1.25      deraadt   411: void    do_log(LogLevel level, const char *fmt, va_list args);
1.22      markus    412:
                    413: /* name to facility/level */
                    414: SyslogFacility log_facility_number(char *name);
                    415: LogLevel log_level_number(char *name);
1.20      markus    416:
                    417: /* Output a message to syslog or stderr */
1.25      deraadt   418: void    fatal(const char *fmt,...) __attribute__((format(printf, 1, 2)));
                    419: void    error(const char *fmt,...) __attribute__((format(printf, 1, 2)));
                    420: void    log(const char *fmt,...) __attribute__((format(printf, 1, 2)));
                    421: void    verbose(const char *fmt,...) __attribute__((format(printf, 1, 2)));
                    422: void    debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
1.51      markus    423: void    debug2(const char *fmt,...) __attribute__((format(printf, 1, 2)));
                    424: void    debug3(const char *fmt,...) __attribute__((format(printf, 1, 2)));
1.25      deraadt   425:
1.20      markus    426: /* same as fatal() but w/o logging */
1.25      deraadt   427: void    fatal_cleanup(void);
1.20      markus    428:
1.26      markus    429: /*
                    430:  * Registers a cleanup function to be called by fatal()/fatal_cleanup()
                    431:  * before exiting. It is permissible to call fatal_remove_cleanup for the
                    432:  * function itself from the function.
                    433:  */
1.25      deraadt   434: void    fatal_add_cleanup(void (*proc) (void *context), void *context);
1.20      markus    435:
                    436: /* Removes a cleanup function to be called at fatal(). */
1.25      deraadt   437: void    fatal_remove_cleanup(void (*proc) (void *context), void *context);
1.1       deraadt   438:
1.36      markus    439: /* ---- misc */
                    440:
1.26      markus    441: /*
                    442:  * Expands tildes in the file name.  Returns data allocated by xmalloc.
                    443:  * Warning: this calls getpw*.
                    444:  */
1.25      deraadt   445: char   *tilde_expand_filename(const char *filename, uid_t my_uid);
1.46      markus    446:
                    447: /* remove newline at end of string */
                    448: char   *chop(char *s);
1.48      provos    449:
                    450: /* return next token in configuration line */
                    451: char   *strdelim(char **s);
1.46      markus    452:
                    453: /* set filedescriptor to non-blocking */
                    454: void   set_nonblock(int fd);
1.1       deraadt   455:
1.26      markus    456: /*
                    457:  * Performs the interactive session.  This handles data transmission between
                    458:  * the client and the program.  Note that the notion of stdin, stdout, and
                    459:  * stderr in this function is sort of reversed: this function writes to stdin
                    460:  * (of the child program), and reads from stdout and stderr (of the child
                    461:  * program).
                    462:  */
1.39      deraadt   463: void    server_loop(pid_t pid, int fdin, int fdout, int fderr);
1.36      markus    464: void    server_loop2(void);
1.1       deraadt   465:
                    466: /* Client side main loop for the interactive session. */
1.49      markus    467: int     client_loop(int have_pty, int escape_char, int id);
1.1       deraadt   468:
                    469: /* Linked list of custom environment strings (see auth-rsa.c). */
                    470: struct envstring {
1.25      deraadt   471:        struct envstring *next;
                    472:        char   *s;
1.1       deraadt   473: };
1.30      deraadt   474:
                    475: /*
                    476:  * Ensure all of data on socket comes through. f==read || f==write
                    477:  */
1.33      d         478: ssize_t        atomicio(ssize_t (*f)(), int fd, void *s, size_t n);
1.30      deraadt   479:
1.1       deraadt   480: #ifdef KRB4
                    481: #include <krb.h>
1.26      markus    482: /*
                    483:  * Performs Kerberos v4 mutual authentication with the client. This returns 0
                    484:  * if the client could not be authenticated, and 1 if authentication was
                    485:  * successful.  This may exit if there is a serious protocol violation.
                    486:  */
1.25      deraadt   487: int     auth_krb4(const char *server_user, KTEXT auth, char **client);
                    488: int     krb4_init(uid_t uid);
                    489: void    krb4_cleanup_proc(void *ignore);
1.28      markus    490: int    auth_krb4_password(struct passwd * pw, const char *password);
1.4       dugsong   491:
                    492: #ifdef AFS
                    493: #include <kafs.h>
                    494:
                    495: /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
1.25      deraadt   496: int     auth_kerberos_tgt(struct passwd * pw, const char *string);
                    497: int     auth_afs_token(struct passwd * pw, const char *token_string);
1.1       deraadt   498:
1.56    ! markus    499: int     creds_to_radix(CREDENTIALS * creds, u_char *buf, size_t buflen);
1.25      deraadt   500: int     radix_to_creds(const char *buf, CREDENTIALS * creds);
                    501: #endif                         /* AFS */
1.1       deraadt   502:
1.25      deraadt   503: #endif                         /* KRB4 */
1.9       markus    504:
                    505: #ifdef SKEY
                    506: #include <skey.h>
1.25      deraadt   507: char   *skey_fake_keyinfo(char *username);
1.28      markus    508: int    auth_skey_password(struct passwd * pw, const char *password);
1.25      deraadt   509: #endif                         /* SKEY */
1.32      markus    510:
                    511: /* AF_UNSPEC or AF_INET or AF_INET6 */
                    512: extern int IPv4or6;
1.1       deraadt   513:
1.25      deraadt   514: #endif                         /* SSH_H */