-/* 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
-#define SSH_AUTH_TIS 5
-#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 /* we use this for s/key */
-#define SSH_SMSG_AUTH_TIS_CHALLENGE 40 /* challenge (string) */
-#define SSH_CMSG_AUTH_TIS_RESPONSE 41 /* response (string) */
-#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) */
-
-/*------------ 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,
- 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).
- */
-
-void
-ssh_login(int host_key_valid, RSA * host_key, const char *host,
- struct sockaddr_in * 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).
- */
-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 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);
-
-/*
- * 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,
- 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.
- */
-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);