/*
- *
+ *
* 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("$Id$"); */
#include <netinet/in.h> /* For struct sockaddr_in */
#include <pwd.h> /* For struct pw */
#include <stdarg.h> /* For va_list */
-
+#include <sys/socket.h> /* For struct sockaddr_storage */
+#include "fake-socket.h" /* For struct sockaddr_storage */
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#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. */
+/*
+ * XXX
+ * 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. */
/* 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. */
+/*
+ * 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
+/*
+ * Major protocol version. Different version indicates major incompatiblity
+ * that prevents communication.
+ *
+ * Minor protocol version. Different version indicates minor incompatibility
+ * that does not prevent interoperation.
+ */
+#define PROTOCOL_MAJOR_1 1
+#define PROTOCOL_MINOR_1 5
-/* Minor protocol version. Different version indicates minor incompatibility
- that does not prevent interoperation. */
-#define PROTOCOL_MINOR 5
+/* We support both SSH1 and SSH2 */
+#define PROTOCOL_MAJOR_2 2
+#define PROTOCOL_MINOR_2 0
-/* Name for the service. The port named by this service overrides the default
- port if present. */
+/*
+ * Name for the service. The port named by this service overrides the
+ * default port if present.
+ */
#define SSH_SERVICE_NAME "ssh"
+#if defined(USE_PAM) && !defined(SSHD_PAM_SERVICE)
+# define SSHD_PAM_SERVICE "sshd"
+#endif
+
#ifndef ETCDIR
#define ETCDIR "/etc"
#endif /* ETCDIR */
#define PIDDIR "/var/run"
#endif /* PIDDIR */
-/* System-wide file containing host keys of known hosts. This file should be
- world-readable. */
+/*
+ * System-wide file containing host keys of known hosts. This file should be
+ * world-readable.
+ */
#define SSH_SYSTEM_HOSTFILE ETCDIR "/ssh_known_hosts"
+#define SSH_SYSTEM_HOSTFILE2 ETCDIR "/ssh_known_hosts2"
-/* 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. */
-
+/*
+ * Of these, ssh_host_key must 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 HOST_DSA_KEY_FILE ETCDIR "/ssh_host_dsa_key"
#ifndef SSH_PROGRAM
#define SSH_PROGRAM "/usr/bin/ssh"
#define ASKPASS_PROGRAM "/usr/lib/ssh/ssh-askpass"
#endif /* ASKPASS_PROGRAM */
-/* The process id of the daemon listening for connections is saved
- here to make it easier to kill the correct daemon when necessary. */
+/*
+ * 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). */
+/*
+ * 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. */
+/*
+ * Relevant only when using builtin PRNG.
+ */
+#ifndef SSH_PRNG_SEED_FILE
+# define SSH_PRNG_SEED_FILE SSH_USER_DIR"/prng_seed"
+#endif /* SSH_PRNG_SEED_FILE */
+#ifndef SSH_PRNG_COMMAND_FILE
+# define SSH_PRNG_COMMAND_FILE ETCDIR "/ssh_prng_cmds"
+#endif /* SSH_PRNG_COMMAND_FILE */
+
+/*
+ * 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"
+#define SSH_USER_HOSTFILE2 "~/.ssh/known_hosts2"
-/* Name of the default file containing client-side authentication key.
- This file should only be readable by the user him/herself. */
+/*
+ * 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"
+#define SSH_CLIENT_ID_DSA ".ssh/id_dsa"
-/* 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. */
+/*
+ * 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.) */
+/*
+ * 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"
+#define SSH_USER_PERMITTED_KEYS2 ".ssh/authorized_keys2"
-/* 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. */
+/*
+ * 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. */
+/*
+ * Ssh-only version of /etc/hosts.equiv. Additionally, the daemon may use
+ * ~/.rhosts and /etc/hosts.equiv if rhosts authentication is enabled.
+ */
#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. */
+/*
+ * Name of the environment variable containing the pathname of the
+ * authentication socket.
+ */
#define SSH_AUTHSOCKET_ENV_NAME "SSH_AUTH_SOCK"
-/* Name of the environment variable containing the pathname of the
- authentication socket. */
+/*
+ * Name of the environment variable containing the pathname of the
+ * authentication socket.
+ */
#define SSH_AGENTPID_ENV_NAME "SSH_AGENT_PID"
-/* 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. */
+/*
+ * Default path to ssh-askpass used by ssh-add,
+ * environment variable for overwriting the default location
+ */
+#ifndef SSH_ASKPASS_DEFAULT
+# define SSH_ASKPASS_DEFAULT "/usr/X11R6/bin/ssh-askpass"
+#endif
+#define SSH_ASKPASS_ENV "SSH_ASKPASS"
+
+/*
+ * 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.) */
+/*
+ * 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. */
+/*
+ * 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_TIS 5
#define SSH_AUTH_KERBEROS 6
#define SSH_PASS_KERBEROS_TGT 7
- /* 8 to 15 are reserved */
+ /* 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_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 */
/*------------ 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
+/*
+ * 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 in. This does many things normally done
+ * by login(1).
+ */
+void
+record_login(pid_t pid, const char *ttyname, const char *user, uid_t uid,
+ const char *host, struct sockaddr *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);
+/*
+ * Records that the user has logged out. This does many thigs normally done
+ * by login(1) or init.
+ */
+void record_logout(pid_t 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,
+/*
+ * 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_storage * hostaddr,
+ u_short 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). */
+/*
+ * 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
+void
ssh_login(int host_key_valid, RSA * host_key, const char *host,
- struct sockaddr_in * hostaddr, uid_t original_real_uid);
+ struct sockaddr * hostaddr, 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). */
+/*
+ * 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).
+ */
int auth_rhosts(struct passwd * pw, const char *client_user);
-/* 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,
- BIGNUM * client_host_key_e, BIGNUM * client_host_key_n);
+/*
+ * 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, RSA* client_host_key);
-/* Tries to authenticate the user using password. Returns true if
- authentication succeeds. */
+/*
+ * 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. */
+/*
+ * 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);
-/* 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. */
+/*
+ * 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. */
+/*
+ * 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. */
+/*
+ * 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. */
+/*
+ * 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. */
+/* Returns the port number of the remote/local host. */
int get_remote_port(void);
+int get_local_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,
- 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,
- 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(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. */
+/*
+ * 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(RSA *pk);
+
+/*
+ * 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. -----------------------*/
/* same as fatal() but w/o logging */
void fatal_cleanup(void);
-/* Registers a cleanup function to be called by fatal()/fatal_cleanup() before exiting.
- It is permissible to call fatal_remove_cleanup for the function itself
- from the function. */
+/*
+ * Registers a cleanup function to be called by fatal()/fatal_cleanup()
+ * before exiting. It is permissible to call fatal_remove_cleanup for the
+ * function itself from the function.
+ */
void fatal_add_cleanup(void (*proc) (void *context), void *context);
/* Removes a cleanup function to be called at fatal(). */
void fatal_remove_cleanup(void (*proc) (void *context), void *context);
-/*---------------- definitions for channels ------------------*/
-
-/* Sets specific protocol options. */
-void channel_set_options(int hostname_in_open);
-
-/* Allocate a new channel object and set its type and socket. Remote_name
- must have been allocated with xmalloc; this will free it when the channel
- is freed. */
-int channel_allocate(int type, int sock, char *remote_name);
-
-/* Free the channel and close its socket. */
-void channel_free(int channel);
-
-/* Add any bits relevant to channels in select bitmasks. */
-void channel_prepare_select(fd_set * readset, fd_set * writeset);
-
-/* After select, perform any appropriate operations for channels which
- have events pending. */
-void channel_after_select(fd_set * readset, fd_set * writeset);
-
-/* If there is data to send to the connection, send some of it now. */
-void channel_output_poll(void);
-
-/* This is called when a packet of type CHANNEL_DATA has just been received.
- The message type has already been consumed, but channel number and data
- is still there. */
-void channel_input_data(int payload_len);
+/* ---- misc */
-/* 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);
+/*
+ * 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);
-/* 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);
+/* remove newline at end of string */
+char *chop(char *s);
-/* This is called when SSH_SMSG_X11_OPEN is received. The packet contains
- the remote channel number. We should do whatever we want, and respond
- with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE. */
-void x11_input_open(int payload_len);
-
-/* Requests forwarding of X11 connections. This should be called on the
- client only. */
-void x11_request_forwarding(void);
-
-/* Requests forwarding for X11 connections, with authentication spoofing.
- This should be called in the client only. */
-void x11_request_forwarding_with_spoofing(const char *proto, const char *data);
-
-/* Sends a message to the server to request authentication fd forwarding. */
-void auth_request_forwarding(void);
-
-/* Returns the name of the forwarded authentication socket. Returns NULL
- if there is no forwarded authentication socket. The returned value points
- to a static buffer. */
-char *auth_get_socket_name(void);
-
-/* This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
- This starts forwarding authentication requests. */
-void auth_input_request_forwarding(struct passwd * pw);
-
-/* This is called to process an SSH_SMSG_AGENT_OPEN message. */
-void auth_input_open_request(void);
-
-/* Returns true if the given string matches the pattern (which may contain
- ? and * as wildcards), and zero if it does not match. */
-int match_pattern(const char *s, const char *pattern);
-
-/* Expands tildes in the file name. Returns data allocated by xmalloc.
- Warning: this calls getpw*. */
-char *tilde_expand_filename(const char *filename, uid_t my_uid);
+/* set filedescriptor to non-blocking */
+void set_nonblock(int fd);
-/* 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);
+/*
+ * 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(pid_t pid, int fdin, int fdout, int fderr);
+void server_loop2(void);
/* Client side main loop for the interactive session. */
int client_loop(int have_pty, int escape_char);
struct envstring *next;
char *s;
};
+
+/*
+ * Ensure all of data on socket comes through. f==read || f==write
+ */
+ssize_t atomicio(ssize_t (*f)(), int fd, void *s, size_t n);
+
#ifdef KRB4
#include <krb.h>
-
-/* Performs Kerberos v4 mutual authentication with the client. This returns
- 0 if the client could not be authenticated, and 1 if authentication was
- successful. This may exit if there is a serious protocol violation. */
+/*
+ * Performs Kerberos v4 mutual authentication with the client. This returns 0
+ * if the client could not be authenticated, and 1 if authentication was
+ * successful. This may exit if there is a serious protocol violation.
+ */
int auth_krb4(const char *server_user, KTEXT auth, char **client);
int krb4_init(uid_t uid);
void krb4_cleanup_proc(void *ignore);
+int auth_krb4_password(struct passwd * pw, const char *password);
#ifdef AFS
#include <kafs.h>
int auth_kerberos_tgt(struct passwd * pw, const char *string);
int auth_afs_token(struct passwd * pw, const char *token_string);
-int creds_to_radix(CREDENTIALS * creds, unsigned char *buf);
+int creds_to_radix(CREDENTIALS * creds, unsigned char *buf, size_t buflen);
int radix_to_creds(const char *buf, CREDENTIALS * creds);
#endif /* AFS */
#ifdef SKEY
#include <skey.h>
char *skey_fake_keyinfo(char *username);
+int auth_skey_password(struct passwd * pw, const char *password);
#endif /* SKEY */
+/* AF_UNSPEC or AF_INET or AF_INET6 */
+extern int IPv4or6;
+
+#ifdef USE_PAM
+#include "auth-pam.h"
+#endif /* USE_PAM */
+
#endif /* SSH_H */
andersk / openssh.git / blobdiff