1296853Sdes/* $OpenBSD: packet.h,v 1.70 2016/02/08 10:57:07 djm Exp $ */ 292559Sdes 357429Smarkm/* 457429Smarkm * Author: Tatu Ylonen <ylo@cs.hut.fi> 557429Smarkm * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 657429Smarkm * All rights reserved 757429Smarkm * Interface for the packet protocol functions. 860576Skris * 965674Skris * As far as I am concerned, the code I have written for this software 1065674Skris * can be used freely for any purpose. Any derived versions of this 1165674Skris * software must be clearly marked as such, and if the derived work is 1265674Skris * incompatible with the protocol description in the RFC file, it must be 1365674Skris * called by a name other than "ssh" or "Secure Shell". 1457429Smarkm */ 1557429Smarkm 1657429Smarkm#ifndef PACKET_H 1757429Smarkm#define PACKET_H 1857429Smarkm 19162856Sdes#include <termios.h> 20162856Sdes 21295367Sdes#ifdef WITH_OPENSSL 22295367Sdes# include <openssl/bn.h> 23295367Sdes# ifdef OPENSSL_HAS_ECC 24295367Sdes# include <openssl/ec.h> 25295367Sdes# else /* OPENSSL_HAS_ECC */ 26295367Sdes# define EC_KEY void 27295367Sdes# define EC_GROUP void 28295367Sdes# define EC_POINT void 29295367Sdes# endif /* OPENSSL_HAS_ECC */ 30295367Sdes#else /* WITH_OPENSSL */ 31295367Sdes# define BIGNUM void 32295367Sdes# define EC_KEY void 33295367Sdes# define EC_GROUP void 34295367Sdes# define EC_POINT void 35295367Sdes#endif /* WITH_OPENSSL */ 3657429Smarkm 37295367Sdes#include <signal.h> 38295367Sdes#include "openbsd-compat/sys-queue.h" 3957429Smarkm 40295367Sdesstruct kex; 41295367Sdesstruct sshkey; 42295367Sdesstruct sshbuf; 43295367Sdesstruct session_state; /* private session data */ 4457429Smarkm 45295367Sdes#include "dispatch.h" /* typedef, DISPATCH_MAX */ 4657429Smarkm 47295367Sdesstruct key_entry { 48295367Sdes TAILQ_ENTRY(key_entry) next; 49295367Sdes struct sshkey *key; 50295367Sdes}; 5157429Smarkm 52295367Sdesstruct ssh { 53295367Sdes /* Session state */ 54295367Sdes struct session_state *state; 5598684Sdes 56295367Sdes /* Key exchange */ 57295367Sdes struct kex *kex; 5857429Smarkm 59295367Sdes /* cached remote ip address and port*/ 60295367Sdes char *remote_ipaddr; 61295367Sdes int remote_port; 6257429Smarkm 63295367Sdes /* Dispatcher table */ 64295367Sdes dispatch_fn *dispatch[DISPATCH_MAX]; 65295367Sdes /* number of packets to ignore in the dispatcher */ 66295367Sdes int dispatch_skip_packets; 67295367Sdes 68295367Sdes /* datafellows */ 69295367Sdes int compat; 70295367Sdes 71295367Sdes /* Lists for private and public keys */ 72295367Sdes TAILQ_HEAD(, key_entry) private_keys; 73295367Sdes TAILQ_HEAD(, key_entry) public_keys; 74295367Sdes 75295367Sdes /* APP data */ 76295367Sdes void *app_data; 77295367Sdes}; 78295367Sdes 79295367Sdesstruct ssh *ssh_alloc_session_state(void); 80295367Sdesstruct ssh *ssh_packet_set_connection(struct ssh *, int, int); 81295367Sdesvoid ssh_packet_set_timeout(struct ssh *, int, int); 82295367Sdesint ssh_packet_stop_discard(struct ssh *); 83295367Sdesint ssh_packet_connection_af(struct ssh *); 84295367Sdesvoid ssh_packet_set_nonblocking(struct ssh *); 85295367Sdesint ssh_packet_get_connection_in(struct ssh *); 86295367Sdesint ssh_packet_get_connection_out(struct ssh *); 87295367Sdesvoid ssh_packet_close(struct ssh *); 88295367Sdesvoid ssh_packet_set_encryption_key(struct ssh *, const u_char *, u_int, int); 89296853Sdesint ssh_packet_is_rekeying(struct ssh *); 90295367Sdesvoid ssh_packet_set_protocol_flags(struct ssh *, u_int); 91295367Sdesu_int ssh_packet_get_protocol_flags(struct ssh *); 92295367Sdesint ssh_packet_start_compression(struct ssh *, int); 93295367Sdesvoid ssh_packet_set_tos(struct ssh *, int); 94295367Sdesvoid ssh_packet_set_interactive(struct ssh *, int, int, int); 95295367Sdesint ssh_packet_is_interactive(struct ssh *); 96295367Sdesvoid ssh_packet_set_server(struct ssh *); 97295367Sdesvoid ssh_packet_set_authenticated(struct ssh *); 98295367Sdes 99295367Sdesint ssh_packet_send1(struct ssh *); 100295367Sdesint ssh_packet_send2_wrapped(struct ssh *); 101295367Sdesint ssh_packet_send2(struct ssh *); 102295367Sdes 103295367Sdesint ssh_packet_read(struct ssh *); 104295367Sdesint ssh_packet_read_expect(struct ssh *, u_int type); 105295367Sdesint ssh_packet_read_poll(struct ssh *); 106295367Sdesint ssh_packet_read_poll1(struct ssh *, u_char *); 107295367Sdesint ssh_packet_read_poll2(struct ssh *, u_char *, u_int32_t *seqnr_p); 108295367Sdesint ssh_packet_process_incoming(struct ssh *, const char *buf, u_int len); 109295367Sdesint ssh_packet_read_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); 110295367Sdesint ssh_packet_read_poll_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); 111295367Sdes 112295367Sdesconst void *ssh_packet_get_string_ptr(struct ssh *, u_int *length_ptr); 113295367Sdesvoid ssh_packet_disconnect(struct ssh *, const char *fmt, ...) 114295367Sdes __attribute__((format(printf, 2, 3))) 115295367Sdes __attribute__((noreturn)); 116295367Sdesvoid ssh_packet_send_debug(struct ssh *, const char *fmt, ...) __attribute__((format(printf, 2, 3))); 117295367Sdes 118295367Sdesint ssh_set_newkeys(struct ssh *, int mode); 119295367Sdesvoid ssh_packet_get_bytes(struct ssh *, u_int64_t *, u_int64_t *); 120295367Sdes 121295367Sdestypedef void *(ssh_packet_comp_alloc_func)(void *, u_int, u_int); 122295367Sdestypedef void (ssh_packet_comp_free_func)(void *, void *); 123295367Sdesvoid ssh_packet_set_compress_hooks(struct ssh *, void *, 124295367Sdes ssh_packet_comp_alloc_func *, ssh_packet_comp_free_func *); 125295367Sdes 126295367Sdesint ssh_packet_write_poll(struct ssh *); 127295367Sdesint ssh_packet_write_wait(struct ssh *); 128295367Sdesint ssh_packet_have_data_to_write(struct ssh *); 129295367Sdesint ssh_packet_not_very_much_data_to_write(struct ssh *); 130295367Sdes 131295367Sdesint ssh_packet_connection_is_on_socket(struct ssh *); 132295367Sdesint ssh_packet_remaining(struct ssh *); 133295367Sdesvoid ssh_packet_send_ignore(struct ssh *, int); 134295367Sdes 13592559Sdesvoid tty_make_modes(int, struct termios *); 13692559Sdesvoid tty_parse_modes(int, int *); 13757429Smarkm 138295367Sdesvoid ssh_packet_set_alive_timeouts(struct ssh *, int); 139295367Sdesint ssh_packet_inc_alive_timeouts(struct ssh *); 140295367Sdesint ssh_packet_set_maxsize(struct ssh *, u_int); 141295367Sdesu_int ssh_packet_get_maxsize(struct ssh *); 14257429Smarkm 143295367Sdesint ssh_packet_get_state(struct ssh *, struct sshbuf *); 144295367Sdesint ssh_packet_set_state(struct ssh *, struct sshbuf *); 14560576Skris 146295367Sdesconst char *ssh_remote_ipaddr(struct ssh *); 147296853Sdesint ssh_remote_port(struct ssh *); 148124211Sdes 149296853Sdesvoid ssh_packet_set_rekey_limits(struct ssh *, u_int64_t, time_t); 150295367Sdestime_t ssh_packet_get_rekey_timeout(struct ssh *); 151197679Sdes 152295367Sdesvoid *ssh_packet_get_input(struct ssh *); 153295367Sdesvoid *ssh_packet_get_output(struct ssh *); 154295367Sdes 155295367Sdes/* new API */ 156295367Sdesint sshpkt_start(struct ssh *ssh, u_char type); 157295367Sdesint sshpkt_send(struct ssh *ssh); 158295367Sdesint sshpkt_disconnect(struct ssh *, const char *fmt, ...) 159295367Sdes __attribute__((format(printf, 2, 3))); 160295367Sdesint sshpkt_add_padding(struct ssh *, u_char); 161295367Sdesvoid sshpkt_fatal(struct ssh *ssh, const char *tag, int r); 162295367Sdes 163295367Sdesint sshpkt_put(struct ssh *ssh, const void *v, size_t len); 164295367Sdesint sshpkt_putb(struct ssh *ssh, const struct sshbuf *b); 165295367Sdesint sshpkt_put_u8(struct ssh *ssh, u_char val); 166295367Sdesint sshpkt_put_u32(struct ssh *ssh, u_int32_t val); 167295367Sdesint sshpkt_put_u64(struct ssh *ssh, u_int64_t val); 168295367Sdesint sshpkt_put_string(struct ssh *ssh, const void *v, size_t len); 169295367Sdesint sshpkt_put_cstring(struct ssh *ssh, const void *v); 170295367Sdesint sshpkt_put_stringb(struct ssh *ssh, const struct sshbuf *v); 171295367Sdesint sshpkt_put_ec(struct ssh *ssh, const EC_POINT *v, const EC_GROUP *g); 172295367Sdesint sshpkt_put_bignum1(struct ssh *ssh, const BIGNUM *v); 173295367Sdesint sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v); 174295367Sdes 175295367Sdesint sshpkt_get(struct ssh *ssh, void *valp, size_t len); 176295367Sdesint sshpkt_get_u8(struct ssh *ssh, u_char *valp); 177295367Sdesint sshpkt_get_u32(struct ssh *ssh, u_int32_t *valp); 178295367Sdesint sshpkt_get_u64(struct ssh *ssh, u_int64_t *valp); 179295367Sdesint sshpkt_get_string(struct ssh *ssh, u_char **valp, size_t *lenp); 180295367Sdesint sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp); 181295367Sdesint sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp); 182295367Sdesint sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g); 183295367Sdesint sshpkt_get_bignum1(struct ssh *ssh, BIGNUM *v); 184295367Sdesint sshpkt_get_bignum2(struct ssh *ssh, BIGNUM *v); 185295367Sdesint sshpkt_get_end(struct ssh *ssh); 186295367Sdesconst u_char *sshpkt_ptr(struct ssh *, size_t *lenp); 187295367Sdes 188295367Sdes/* OLD API */ 189295367Sdesextern struct ssh *active_state; 190295367Sdes#include "opacket.h" 191295367Sdes 192295367Sdes#if !defined(WITH_OPENSSL) 193295367Sdes# undef BIGNUM 194295367Sdes# undef EC_KEY 195295367Sdes# undef EC_GROUP 196295367Sdes# undef EC_POINT 197295367Sdes#elif !defined(OPENSSL_HAS_ECC) 198295367Sdes# undef EC_KEY 199295367Sdes# undef EC_GROUP 200295367Sdes# undef EC_POINT 201295367Sdes#endif 202295367Sdes 20357429Smarkm#endif /* PACKET_H */ 204