/*
- *
- * 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.
- *
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
*/
-/* RCSID("$Id$"); */
+/* RCSID("$OpenBSD: ssh.h,v 1.55 2000/11/25 17:19:33 markus Exp $"); */
#ifndef SSH_H
#define SSH_H
#include <netinet/in.h> /* For struct sockaddr_in */
#include <pwd.h> /* For struct pw */
#include <stdarg.h> /* For va_list */
+#include <syslog.h> /* For LOG_AUTH and friends */
#include <sys/socket.h> /* For struct sockaddr_storage */
#include "fake-socket.h" /* For struct sockaddr_storage */
#ifdef HAVE_SYS_SELECT_H
#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
/*
* 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
+#define PROTOCOL_MAJOR_1 1
+#define PROTOCOL_MINOR_1 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
*/
#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 */
* world-readable.
*/
#define SSH_SYSTEM_HOSTFILE ETCDIR "/ssh_known_hosts"
+#define SSH_SYSTEM_HOSTFILE2 ETCDIR "/ssh_known_hosts2"
/*
* Of these, ssh_host_key must be readable only by root, whereas ssh_config
#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"
+#define DH_PRIMES ETCDIR "/primes"
#ifndef SSH_PROGRAM
#define SSH_PROGRAM "/usr/bin/ssh"
#endif /* SSH_PROGRAM */
#ifndef LOGIN_PROGRAM
-#define LOGIN_PROGRAM "/usr/bin/login"
+# ifdef LOGIN_PROGRAM_FALLBACK
+# define LOGIN_PROGRAM LOGIN_PROGRAM_FALLBACK
+# else
+# define LOGIN_PROGRAM "/usr/bin/login"
+# endif
#endif /* LOGIN_PROGRAM */
#ifndef ASKPASS_PROGRAM
*/
#define SSH_USER_DIR ".ssh"
+/*
+ * 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.
*/
#define SSH_CLIENT_IDENTITY ".ssh/identity"
+#define SSH_CLIENT_ID_DSA ".ssh/id_dsa"
+#define SSH_CLIENT_ID_RSA ".ssh/id_rsa"
/*
* Configuration file in user\'s home directory. This file need not be
* 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
* 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
+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,
+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);
+void record_logout(pid_t pid, const char *ttyname);
/*------------ definitions for sshconnect.c ----------*/
* and zero on failure. If the connection is successful, this calls
* packet_set_connection for the connection.
*/
-int
+int
ssh_connect(const char *host, struct sockaddr_storage * hostaddr,
u_short port, int connection_attempts,
int anonymous, uid_t original_real_uid,
* references from the packet module).
*/
-void
+void
ssh_login(int host_key_valid, RSA * host_key, const char *host,
struct sockaddr * hostaddr, uid_t original_real_uid);
* Tries to authenticate the user using the .rhosts file and the host using
* its host key. Returns true if authentication succeeds.
*/
-int
+int
auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key);
/*
* 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);
+char *read_passphrase(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. -----------------------*/
SYSLOG_FACILITY_DAEMON,
SYSLOG_FACILITY_USER,
SYSLOG_FACILITY_AUTH,
+#ifdef LOG_AUTHPRIV
+ SYSLOG_FACILITY_AUTHPRIV,
+#endif
SYSLOG_FACILITY_LOCAL0,
SYSLOG_FACILITY_LOCAL1,
SYSLOG_FACILITY_LOCAL2,
SYSLOG_LEVEL_ERROR,
SYSLOG_LEVEL_INFO,
SYSLOG_LEVEL_VERBOSE,
- SYSLOG_LEVEL_DEBUG
+ SYSLOG_LEVEL_DEBUG1,
+ SYSLOG_LEVEL_DEBUG2,
+ SYSLOG_LEVEL_DEBUG3
} LogLevel;
/* Initializes logging. */
void log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr);
void log(const char *fmt,...) __attribute__((format(printf, 1, 2)));
void verbose(const char *fmt,...) __attribute__((format(printf, 1, 2)));
void debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
+void debug2(const char *fmt,...) __attribute__((format(printf, 1, 2)));
+void debug3(const char *fmt,...) __attribute__((format(printf, 1, 2)));
/* same as fatal() but w/o logging */
void fatal_cleanup(void);
/* 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);
-
-/* 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(u_short port, const char *host,
- u_short remote_port, int gateway_ports);
-
-/*
- * 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(u_short port, const char *host,
- u_short 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, int x11_display_offset);
-
-/*
- * 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);
+/* ---- misc */
/*
* Expands tildes in the file name. Returns data allocated by xmalloc.
*/
char *tilde_expand_filename(const char *filename, uid_t my_uid);
+/* remove newline at end of string */
+char *chop(char *s);
+
+/* return next token in configuration line */
+char *strdelim(char **s);
+
+/* 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
* (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);
+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);
+int client_loop(int have_pty, int escape_char, int id);
/* Linked list of custom environment strings (see auth-rsa.c). */
struct envstring {
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 */
/* 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