| /* |
| |
| ssh.h |
| |
| Author: Tatu Ylonen <ylo@cs.hut.fi> |
| |
| Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| All rights reserved |
| |
| Created: Fri Mar 17 17:09:37 1995 ylo |
| |
| Generic header file for ssh. |
| |
| */ |
| |
| /* RCSID("$Id: ssh.h,v 1.2 1999/10/28 03:25:17 damien Exp $"); */ |
| |
| #ifndef SSH_H |
| #define SSH_H |
| |
| /* Added by Dan */ |
| #ifndef SHUT_RDWR |
| enum |
| { |
| SHUT_RD = 0, /* No more receptions. */ |
| #define SHUT_RD SHUT_RD |
| SHUT_WR, /* No more transmissions. */ |
| #define SHUT_WR SHUT_WR |
| SHUT_RDWR /* No more receptions or transmissions. */ |
| #define SHUT_RDWR SHUT_RDWR |
| }; |
| #endif |
| |
| |
| #include "rsa.h" |
| #include "cipher.h" |
| |
| /* The default cipher used if IDEA is not supported by the remote host. |
| It is recommended that this be one of the mandatory ciphers (DES, 3DES), |
| though that is not required. */ |
| #define SSH_FALLBACK_CIPHER SSH_CIPHER_3DES |
| |
| /* Cipher used for encrypting authentication files. */ |
| #define SSH_AUTHFILE_CIPHER SSH_CIPHER_3DES |
| |
| /* Default port number. */ |
| #define SSH_DEFAULT_PORT 22 |
| |
| /* Maximum number of TCP/IP ports forwarded per direction. */ |
| #define SSH_MAX_FORWARDS_PER_DIRECTION 100 |
| |
| /* Maximum number of RSA authentication identity files that can be specified |
| in configuration files or on the command line. */ |
| #define SSH_MAX_IDENTITY_FILES 100 |
| |
| /* Major protocol version. Different version indicates major incompatiblity |
| that prevents communication. */ |
| #define PROTOCOL_MAJOR 1 |
| |
| /* Minor protocol version. Different version indicates minor incompatibility |
| that does not prevent interoperation. */ |
| #define PROTOCOL_MINOR 5 |
| |
| /* Name for the service. The port named by this service overrides the default |
| port if present. */ |
| #define SSH_SERVICE_NAME "ssh" |
| |
| #ifndef ETCDIR |
| #define ETCDIR "/etc" |
| #endif /* ETCDIR */ |
| |
| #define PIDDIR "/var/run" |
| |
| /* System-wide file containing host keys of known hosts. This file should be |
| world-readable. */ |
| #define SSH_SYSTEM_HOSTFILE ETCDIR "/ssh_known_hosts" |
| |
| /* HOST_KEY_FILE /etc/ssh_host_key, |
| SERVER_CONFIG_FILE /etc/sshd_config, |
| and HOST_CONFIG_FILE /etc/ssh_config |
| are all defined in Makefile.in. Of these, ssh_host_key should be readable |
| only by root, whereas ssh_config should be world-readable. */ |
| |
| #define HOST_KEY_FILE ETCDIR "/ssh_host_key" |
| #define SERVER_CONFIG_FILE ETCDIR "/sshd_config" |
| #define HOST_CONFIG_FILE ETCDIR "/ssh_config" |
| |
| #define SSH_PROGRAM "/usr/bin/ssh" |
| |
| /* The process id of the daemon listening for connections is saved |
| here to make it easier to kill the correct daemon when necessary. */ |
| #define SSH_DAEMON_PID_FILE PIDDIR "/sshd.pid" |
| |
| /* The directory in user\'s home directory in which the files reside. |
| The directory should be world-readable (though not all files are). */ |
| #define SSH_USER_DIR ".ssh" |
| |
| /* Per-user file containing host keys of known hosts. This file need |
| not be readable by anyone except the user him/herself, though this does |
| not contain anything particularly secret. */ |
| #define SSH_USER_HOSTFILE "~/.ssh/known_hosts" |
| |
| /* Name of the default file containing client-side authentication key. |
| This file should only be readable by the user him/herself. */ |
| #define SSH_CLIENT_IDENTITY ".ssh/identity" |
| |
| /* Configuration file in user\'s home directory. This file need not be |
| readable by anyone but the user him/herself, but does not contain |
| anything particularly secret. If the user\'s home directory resides |
| on an NFS volume where root is mapped to nobody, this may need to be |
| world-readable. */ |
| #define SSH_USER_CONFFILE ".ssh/config" |
| |
| /* File containing a list of those rsa keys that permit logging in as |
| this user. This file need not be |
| readable by anyone but the user him/herself, but does not contain |
| anything particularly secret. If the user\'s home directory resides |
| on an NFS volume where root is mapped to nobody, this may need to be |
| world-readable. (This file is read by the daemon which is running as |
| root.) */ |
| #define SSH_USER_PERMITTED_KEYS ".ssh/authorized_keys" |
| |
| /* Per-user and system-wide ssh "rc" files. These files are executed with |
| /bin/sh before starting the shell or command if they exist. They |
| will be passed "proto cookie" as arguments if X11 forwarding with |
| spoofing is in use. xauth will be run if neither of these exists. */ |
| #define SSH_USER_RC ".ssh/rc" |
| #define SSH_SYSTEM_RC ETCDIR "/sshrc" |
| |
| /* Ssh-only version of /etc/hosts.equiv. */ |
| #define SSH_HOSTS_EQUIV ETCDIR "/shosts.equiv" |
| |
| /* Additionally, the daemon may use ~/.rhosts and /etc/hosts.equiv if |
| rhosts authentication is enabled. */ |
| |
| /* Name of the environment variable containing the pathname of the |
| authentication socket. */ |
| #define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK" |
| |
| /* Force host key length and server key length to differ by at least this |
| many bits. This is to make double encryption with rsaref work. */ |
| #define SSH_KEY_BITS_RESERVED 128 |
| |
| /* Length of the session key in bytes. (Specified as 256 bits in the |
| protocol.) */ |
| #define SSH_SESSION_KEY_LENGTH 32 |
| |
| /* Name of Kerberos service for SSH to use. */ |
| #define KRB4_SERVICE_NAME "rcmd" |
| |
| /* Authentication methods. New types can be added, but old types should not |
| be removed for compatibility. The maximum allowed value is 31. */ |
| #define SSH_AUTH_RHOSTS 1 |
| #define SSH_AUTH_RSA 2 |
| #define SSH_AUTH_PASSWORD 3 |
| #define SSH_AUTH_RHOSTS_RSA 4 |
| /* 5 is TIS */ |
| #define SSH_AUTH_KERBEROS 6 |
| #define SSH_PASS_KERBEROS_TGT 7 |
| /* 8 to 15 are reserved */ |
| #define SSH_PASS_AFS_TOKEN 21 |
| |
| /* Protocol flags. These are bit masks. */ |
| #define SSH_PROTOFLAG_SCREEN_NUMBER 1 /* X11 forwarding includes screen */ |
| #define SSH_PROTOFLAG_HOST_IN_FWD_OPEN 2 /* forwarding opens contain host */ |
| |
| /* Definition of message types. New values can be added, but old values |
| should not be removed or without careful consideration of the consequences |
| for compatibility. The maximum value is 254; value 255 is reserved |
| for future extension. */ |
| /* Message name */ /* msg code */ /* arguments */ |
| #define SSH_MSG_NONE 0 /* no message */ |
| #define SSH_MSG_DISCONNECT 1 /* cause (string) */ |
| #define SSH_SMSG_PUBLIC_KEY 2 /* ck,msk,srvk,hostk */ |
| #define SSH_CMSG_SESSION_KEY 3 /* key (BIGNUM) */ |
| #define SSH_CMSG_USER 4 /* user (string) */ |
| #define SSH_CMSG_AUTH_RHOSTS 5 /* user (string) */ |
| #define SSH_CMSG_AUTH_RSA 6 /* modulus (BIGNUM) */ |
| #define SSH_SMSG_AUTH_RSA_CHALLENGE 7 /* int (BIGNUM) */ |
| #define SSH_CMSG_AUTH_RSA_RESPONSE 8 /* int (BIGNUM) */ |
| #define SSH_CMSG_AUTH_PASSWORD 9 /* pass (string) */ |
| #define SSH_CMSG_REQUEST_PTY 10 /* TERM, tty modes */ |
| #define SSH_CMSG_WINDOW_SIZE 11 /* row,col,xpix,ypix */ |
| #define SSH_CMSG_EXEC_SHELL 12 /* */ |
| #define SSH_CMSG_EXEC_CMD 13 /* cmd (string) */ |
| #define SSH_SMSG_SUCCESS 14 /* */ |
| #define SSH_SMSG_FAILURE 15 /* */ |
| #define SSH_CMSG_STDIN_DATA 16 /* data (string) */ |
| #define SSH_SMSG_STDOUT_DATA 17 /* data (string) */ |
| #define SSH_SMSG_STDERR_DATA 18 /* data (string) */ |
| #define SSH_CMSG_EOF 19 /* */ |
| #define SSH_SMSG_EXITSTATUS 20 /* status (int) */ |
| #define SSH_MSG_CHANNEL_OPEN_CONFIRMATION 21 /* channel (int) */ |
| #define SSH_MSG_CHANNEL_OPEN_FAILURE 22 /* channel (int) */ |
| #define SSH_MSG_CHANNEL_DATA 23 /* ch,data (int,str) */ |
| #define SSH_MSG_CHANNEL_CLOSE 24 /* channel (int) */ |
| #define SSH_MSG_CHANNEL_CLOSE_CONFIRMATION 25 /* channel (int) */ |
| /* SSH_CMSG_X11_REQUEST_FORWARDING 26 OBSOLETE */ |
| #define SSH_SMSG_X11_OPEN 27 /* channel (int) */ |
| #define SSH_CMSG_PORT_FORWARD_REQUEST 28 /* p,host,hp (i,s,i) */ |
| #define SSH_MSG_PORT_OPEN 29 /* ch,h,p (i,s,i) */ |
| #define SSH_CMSG_AGENT_REQUEST_FORWARDING 30 /* */ |
| #define SSH_SMSG_AGENT_OPEN 31 /* port (int) */ |
| #define SSH_MSG_IGNORE 32 /* string */ |
| #define SSH_CMSG_EXIT_CONFIRMATION 33 /* */ |
| #define SSH_CMSG_X11_REQUEST_FORWARDING 34 /* proto,data (s,s) */ |
| #define SSH_CMSG_AUTH_RHOSTS_RSA 35 /* user,mod (s,mpi) */ |
| #define SSH_MSG_DEBUG 36 /* string */ |
| #define SSH_CMSG_REQUEST_COMPRESSION 37 /* level 1-9 (int) */ |
| #define SSH_CMSG_MAX_PACKET_SIZE 38 /* size 4k-1024k (int) */ |
| #define SSH_CMSG_AUTH_TIS 39 /* this is proto-1.5, but we ignore TIS */ |
| #define SSH_SMSG_AUTH_TIS_CHALLENGE 40 |
| #define SSH_CMSG_AUTH_TIS_RESPONSE 41 |
| |
| #define SSH_CMSG_AUTH_KERBEROS 42 /* (KTEXT) */ |
| #define SSH_SMSG_AUTH_KERBEROS_RESPONSE 43 /* (KTEXT) */ |
| #define SSH_CMSG_HAVE_KERBEROS_TGT 44 /* credentials (s) */ |
| #define SSH_CMSG_HAVE_AFS_TOKEN 65 /* token (s) */ |
| |
| |
| /* Includes that need definitions above. */ |
| |
| #include "readconf.h" |
| |
| /*------------ definitions for login.c -------------*/ |
| |
| /* Returns the time when the user last logged in. Returns 0 if the |
| information is not available. This must be called before record_login. |
| The host from which the user logged in is stored in buf. */ |
| unsigned long get_last_login_time(uid_t uid, const char *logname, |
| char *buf, unsigned int bufsize); |
| |
| /* Records that the user has logged in. This does many things normally |
| done by login(1). */ |
| void record_login(int pid, const char *ttyname, const char *user, uid_t uid, |
| const char *host, struct sockaddr_in *addr); |
| |
| /* Records that the user has logged out. This does many thigs normally |
| done by login(1) or init. */ |
| void record_logout(int pid, const char *ttyname); |
| |
| /*------------ definitions for sshconnect.c ----------*/ |
| |
| /* Opens a TCP/IP connection to the remote server on the given host. If |
| port is 0, the default port will be used. If anonymous is zero, |
| a privileged port will be allocated to make the connection. |
| This requires super-user privileges if anonymous is false. |
| Connection_attempts specifies the maximum number of tries, one per |
| second. This returns true on success, and zero on failure. If the |
| connection is successful, this calls packet_set_connection for the |
| connection. */ |
| int ssh_connect(const char *host, struct sockaddr_in *hostaddr, |
| int port, int connection_attempts, |
| int anonymous, uid_t original_real_uid, |
| const char *proxy_command); |
| |
| /* Starts a dialog with the server, and authenticates the current user on the |
| server. This does not need any extra privileges. The basic connection |
| to the server must already have been established before this is called. |
| If login fails, this function prints an error and never returns. |
| This initializes the random state, and leaves it initialized (it will also |
| have references from the packet module). */ |
| void ssh_login(int host_key_valid, RSA *host_key, const char *host, |
| struct sockaddr_in *hostaddr, Options *options, |
| uid_t original_real_uid); |
| |
| /*------------ Definitions for various authentication methods. -------*/ |
| |
| /* Tries to authenticate the user using the .rhosts file. Returns true if |
| authentication succeeds. If ignore_rhosts is non-zero, this will not |
| consider .rhosts and .shosts (/etc/hosts.equiv will still be used). |
| If strict_modes is true, checks ownership and modes of .rhosts/.shosts. */ |
| int auth_rhosts(struct passwd *pw, const char *client_user, |
| int ignore_rhosts, int strict_modes); |
| |
| /* Tries to authenticate the user using the .rhosts file and the host using |
| its host key. Returns true if authentication succeeds. */ |
| int auth_rhosts_rsa(struct passwd *pw, const char *client_user, |
| unsigned int bits, BIGNUM *client_host_key_e, |
| BIGNUM *client_host_key_n, int ignore_rhosts, |
| int strict_modes); |
| |
| /* Tries to authenticate the user using password. Returns true if |
| authentication succeeds. */ |
| int auth_password(struct passwd *pw, const char *password); |
| |
| /* Performs the RSA authentication dialog 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_rsa(struct passwd *pw, BIGNUM *client_n, int strict_modes); |
| |
| /* Parses an RSA key (number of bits, e, n) from a string. Moves the pointer |
| over the key. Skips any whitespace at the beginning and at end. */ |
| int auth_rsa_read_key(char **cpp, unsigned int *bitsp, BIGNUM *e, BIGNUM *n); |
| |
| /* Returns the name of the machine at the other end of the socket. The |
| returned string should be freed by the caller. */ |
| char *get_remote_hostname(int socket); |
| |
| /* Return the canonical name of the host in the other side of the current |
| connection (as returned by packet_get_connection). The host name is |
| cached, so it is efficient to call this several times. */ |
| const char *get_canonical_hostname(void); |
| |
| /* Returns the remote IP address as an ascii string. The value need not be |
| freed by the caller. */ |
| const char *get_remote_ipaddr(void); |
| |
| /* Returns the port number of the peer of the socket. */ |
| int get_peer_port(int sock); |
| |
| /* Returns the port number of the remote host. */ |
| int get_remote_port(void); |
| |
| /* Tries to match the host name (which must be in all lowercase) against the |
| comma-separated sequence of subpatterns (each possibly preceded by ! to |
| indicate negation). Returns true if there is a positive match; zero |
| otherwise. */ |
| int match_hostname(const char *host, const char *pattern, unsigned int len); |
| |
| /* Checks whether the given host is already in the list of our known hosts. |
| Returns HOST_OK if the host is known and has the specified key, |
| HOST_NEW if the host is not known, and HOST_CHANGED if the host is known |
| but used to have a different host key. The host must be in all lowercase. */ |
| typedef enum { HOST_OK, HOST_NEW, HOST_CHANGED } HostStatus; |
| HostStatus check_host_in_hostfile(const char *filename, |
| const char *host, unsigned int bits, |
| BIGNUM *e, BIGNUM *n, |
| BIGNUM *ke, BIGNUM *kn); |
| |
| /* Appends an entry to the host file. Returns false if the entry |
| could not be appended. */ |
| int add_host_to_hostfile(const char *filename, const char *host, |
| unsigned int bits, BIGNUM *e, BIGNUM *n); |
| |
| /* Performs the RSA authentication challenge-response dialog with the client, |
| and returns true (non-zero) if the client gave the correct answer to |
| our challenge; returns zero if the client gives a wrong answer. */ |
| int auth_rsa_challenge_dialog(unsigned int bits, 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. */ |
| 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; |
| |
| /* Initializes logging. If debug is non-zero, debug() will output something. |
| If quiet is non-zero, none of these will log send anything to syslog |
| (but maybe to stderr). */ |
| void log_init(char *av0, int on_stderr, int debug, int quiet, |
| SyslogFacility facility); |
| |
| /* Outputs a message to syslog or stderr, depending on the implementation. |
| The format must guarantee that the final message does not exceed 1024 |
| characters. The message should not contain newline. */ |
| void log(const char *fmt, ...); |
| |
| /* Outputs a message to syslog or stderr, depending on the implementation. |
| The format must guarantee that the final message does not exceed 1024 |
| characters. The message should not contain newline. */ |
| void debug(const char *fmt, ...); |
| |
| /* Outputs a message to syslog or stderr, depending on the implementation. |
| The format must guarantee that the final message does not exceed 1024 |
| characters. The message should not contain newline. */ |
| void error(const char *fmt, ...); |
| |
| /* Outputs a message to syslog or stderr, depending on the implementation. |
| The format must guarantee that the final message does not exceed 1024 |
| characters. The message should not contain newline. |
| This call never returns. */ |
| void fatal(const char *fmt, ...); |
| |
| /* Registers a cleanup function to be called by fatal() 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 frunction to be called at fatal(). */ |
| void fatal_remove_cleanup(void (*proc)(void *context), void *context); |
| |
| /*---------------- definitions for channels ------------------*/ |
| |
| /* Sets specific protocol options. */ |
| void channel_set_options(int hostname_in_open); |
| |
| /* Allocate a new channel object and set its type and socket. Remote_name |
| must have been allocated with xmalloc; this will free it when the channel |
| is freed. */ |
| int channel_allocate(int type, int sock, char *remote_name); |
| |
| /* Free the channel and close its socket. */ |
| void channel_free(int channel); |
| |
| /* Add any bits relevant to channels in select bitmasks. */ |
| void channel_prepare_select(fd_set *readset, fd_set *writeset); |
| |
| /* After select, perform any appropriate operations for channels which |
| have events pending. */ |
| void channel_after_select(fd_set *readset, fd_set *writeset); |
| |
| /* If there is data to send to the connection, send some of it now. */ |
| void channel_output_poll(void); |
| |
| /* This is called when a packet of type CHANNEL_DATA has just been received. |
| The message type has already been consumed, but channel number and data |
| is still there. */ |
| void channel_input_data(int payload_len); |
| |
| /* Returns true if no channel has too much buffered data. */ |
| int channel_not_very_much_buffered_data(void); |
| |
| /* This is called after receiving CHANNEL_CLOSE. */ |
| void channel_input_close(void); |
| |
| /* This is called after receiving CHANNEL_CLOSE_CONFIRMATION. */ |
| void channel_input_close_confirmation(void); |
| |
| /* This is called after receiving CHANNEL_OPEN_CONFIRMATION. */ |
| void channel_input_open_confirmation(void); |
| |
| /* This is called after receiving CHANNEL_OPEN_FAILURE from the other side. */ |
| void channel_input_open_failure(void); |
| |
| /* This closes any sockets that are listening for connections; this removes |
| any unix domain sockets. */ |
| void channel_stop_listening(void); |
| |
| /* Closes the sockets of all channels. This is used to close extra file |
| descriptors after a fork. */ |
| void channel_close_all(void); |
| |
| /* Returns the maximum file descriptor number used by the channels. */ |
| int channel_max_fd(void); |
| |
| /* Returns true if there is still an open channel over the connection. */ |
| int channel_still_open(void); |
| |
| /* Returns a string containing a list of all open channels. The list is |
| suitable for displaying to the user. It uses crlf instead of newlines. |
| The caller should free the string with xfree. */ |
| char *channel_open_message(void); |
| |
| /* Initiate forwarding of connections to local port "port" through the secure |
| channel to host:port from remote side. This never returns if there |
| was an error. */ |
| void channel_request_local_forwarding(int port, const char *host, |
| int remote_port); |
| |
| /* Initiate forwarding of connections to port "port" on remote host through |
| the secure channel to host:port from local side. This never returns |
| if there was an error. This registers that open requests for that |
| port are permitted. */ |
| void channel_request_remote_forwarding(int port, const char *host, |
| int remote_port); |
| |
| /* Permits opening to any host/port in SSH_MSG_PORT_OPEN. This is usually |
| called by the server, because the user could connect to any port anyway, |
| and the server has no way to know but to trust the client anyway. */ |
| void channel_permit_all_opens(void); |
| |
| /* This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates |
| listening for the port, and sends back a success reply (or disconnect |
| message if there was an error). This never returns if there was an |
| error. */ |
| void channel_input_port_forward_request(int is_root); |
| |
| /* This is called after receiving PORT_OPEN message. This attempts to connect |
| to the given host:port, and sends back CHANNEL_OPEN_CONFIRMATION or |
| CHANNEL_OPEN_FAILURE. */ |
| void channel_input_port_open(int payload_len); |
| |
| /* Creates a port for X11 connections, and starts listening for it. |
| Returns the display name, or NULL if an error was encountered. */ |
| char *x11_create_display(int screen); |
| |
| /* Creates an internet domain socket for listening for X11 connections. |
| Returns a suitable value for the DISPLAY variable, or NULL if an error |
| occurs. */ |
| char *x11_create_display_inet(int screen); |
| |
| /* This is called when SSH_SMSG_X11_OPEN is received. The packet contains |
| the remote channel number. We should do whatever we want, and respond |
| with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE. */ |
| void x11_input_open(int payload_len); |
| |
| /* Requests forwarding of X11 connections. This should be called on the |
| client only. */ |
| void x11_request_forwarding(void); |
| |
| /* Requests forwarding for X11 connections, with authentication spoofing. |
| This should be called in the client only. */ |
| void x11_request_forwarding_with_spoofing(const char *proto, const char *data); |
| |
| /* Local Xauthority file (server only). */ |
| extern char *xauthfile; |
| |
| /* Sends a message to the server to request authentication fd forwarding. */ |
| void auth_request_forwarding(void); |
| |
| /* Returns the name of the forwarded authentication socket. Returns NULL |
| if there is no forwarded authentication socket. The returned value points |
| to a static buffer. */ |
| char *auth_get_socket_name(void); |
| |
| /* This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server. |
| This starts forwarding authentication requests. */ |
| void auth_input_request_forwarding(struct passwd *pw); |
| |
| /* This is called to process an SSH_SMSG_AGENT_OPEN message. */ |
| void auth_input_open_request(void); |
| |
| /* Returns true if the given string matches the pattern (which may contain |
| ? and * as wildcards), and zero if it does not match. */ |
| int match_pattern(const char *s, const char *pattern); |
| |
| /* Expands tildes in the file name. Returns data allocated by xmalloc. |
| Warning: this calls getpw*. */ |
| char *tilde_expand_filename(const char *filename, uid_t my_uid); |
| |
| /* Performs the interactive session. This handles data transmission between |
| the client and the program. Note that the notion of stdin, stdout, and |
| stderr in this function is sort of reversed: this function writes to |
| stdin (of the child program), and reads from stdout and stderr (of the |
| child program). */ |
| void server_loop(int pid, int fdin, int fdout, int fderr); |
| |
| /* Client side main loop for the interactive session. */ |
| int client_loop(int have_pty, int escape_char); |
| |
| /* Linked list of custom environment strings (see auth-rsa.c). */ |
| struct envstring { |
| struct envstring *next; |
| char *s; |
| }; |
| |
| #ifdef KRB4 |
| #include <krb.h> |
| |
| /* Performs Kerberos v4 mutual authentication with the client. This returns |
| 0 if the client could not be authenticated, and 1 if authentication was |
| successful. This may exit if there is a serious protocol violation. */ |
| int auth_krb4(const char *server_user, KTEXT auth, char **client); |
| int ssh_tf_init(uid_t uid); |
| |
| #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(char *server_user, uid_t uid, const char *string); |
| |
| int creds_to_radix(CREDENTIALS *creds, unsigned char *buf); |
| int radix_to_creds(const char *buf, CREDENTIALS *creds); |
| #endif /* AFS */ |
| |
| #endif /* KRB4 */ |
| |
| #ifdef SKEY |
| #include <skey.h> |
| char *skey_fake_keyinfo(char *username); |
| #endif /* SKEY */ |
| |
| #endif /* SSH_H */ |