lshd.c 3.83 KB
Newer Older
Niels Möller's avatar
Niels Möller committed
1 2 3
/* lshd.c
 *
 * main server program.
4 5
 *
 * $Id$ */
Niels Möller's avatar
Niels Möller committed
6

7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
/* lsh, an implementation of the ssh protocol
 *
 * Copyright (C) 1998 Niels Mller
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
Niels Möller's avatar
Niels Möller committed
25 26

#include <errno.h>
Niels Möller's avatar
Niels Möller committed
27
#include <locale.h>
Niels Möller's avatar
Niels Möller committed
28 29
#include <stdio.h>
#include <string.h>
Niels Möller's avatar
Niels Möller committed
30 31

#include "getopt.h"
Niels Möller's avatar
Niels Möller committed
32 33 34 35 36

#include "io.h"
#include "werror.h"
#include "server.h"

Niels Möller's avatar
Niels Möller committed
37 38
#define BLOCK_SIZE 32768

Niels Möller's avatar
Niels Möller committed
39 40 41 42 43 44 45 46 47 48
/* Global variable */
struct io_backend backend;

void usage() NORETURN;

void usage()
{
  exit(1);
}

Niels Möller's avatar
Niels Möller committed
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
struct signer *secret_key;
struct lsh_string *public_key;

/* A key generated by gnupg */
void init_host_key(struct randomness *r)
{
  mpz_t p, q, g, y, a;
  mpz_t tmp;
  lsh_string *s;
  
  mpz_init_set_str(p,
		   "BC7797D55CF2449CA4B02396246AF5C75CA38C52B6F2E543"
		   "6754198B137B25B0A81DFE269D5CDFD0AEA290A32BA5B918"
		   "B58D64762D40EAA8D70F282B3AC4A7771171B1B1D1AE89F4"
		   "1CD091FE95A6F42A2340081F9E97A4B5F953DE223F10F878"
		   "4C0619A9979643E5325DF71C9C088F3BC82FA0A6C47B5C64"
		   "BC07A31B9CDB2B07", 6);
  mpz_init_set_str(q,
		   "867F7E6563B3FAF19B65C83E9B843150C5CC2201", 16);
  mpz_init_set_str(g,
		   "7FA83EAEDFD8679A4A80C869AD7E353F3B517569C2079C79"
		   "97EA6655764581B073F71AA15C07A789AEB213B106741AAB"
		   "CA81B8300B1F8510D3CD1C3D9D7D11640C1608E8E2E71527"
		   "68B8FDCB5544E29A020D14CC5C12E264C59E57E9F6832DA7"
		   "10B805CD9866C1110D60069D31D5A72D1A1ED96F2B11CFEF"
		   "7AB347F0632CB0C7", 16);
  mpz_init_set_str(y,
		   "2DA5B458DF3616097FA22DB6BDDD31A29E532054D4C208F7"
		   "EBF63EB2476E8E98E0885CFBC5669B56EC834E42058E8BCF"
		   "C259CA1BE981D7721306709499DE27E7B13F62359D9520D1"
		   "3D73C62E8E5C5F6B8E2C70217EC3B557FBCB98535BE3C6EE"
		   "0C71DEC1FE9C6791D3780DD8D593D5030969D303A5818B01"
		   "C4B855C07E8C4F64", 16);
  mpz_set_str(a,
	      "295190AEDBBD6EBD2F817F7D8CCC8B0095DCD82E", 16);

  mpz_init_set(tmp, g);
  mpz_powm(tmp, tmp, a, p);
  if (mpz_cmp(tmp, y))
    fatal("Test key invalid\n");

  mpz_clear(tmp);

  public_key = ssh_format("%a%n%n%n%n", ATOM_SSH_DSS, p, q, g, y);
  s = ssh_format("%n", a);

  secret_key = MAKE_SIGNER(make_dss_algorithm(r),
			   public_key->length, public_key->data,
			   s->length, s->data);

  lsh_free(s);
  mpz_clear(p);
  mpz_clear(q);
  mpz_clear(g);
  mpz_clear(y);
  mpz_clear(a);
}

Niels Möller's avatar
Niels Möller committed
107 108
int main(int argc, char **argv)
{
109
  char *host = NULL;  /* Interface to bind */
Niels Möller's avatar
Niels Möller committed
110 111 112
  char *port = "ssh";
  int option;

113 114
  struct sockaddr_in local;
    
Niels Möller's avatar
Niels Möller committed
115 116 117 118
  /* For filtering messages. Could perhaps also be used when converting
   * strings to and from UTF8. */
  setlocale(LC_CTYPE, "");
  
Niels Möller's avatar
Niels Möller committed
119
  while((option = getopt(argc, argv, "dp:qi:v")) != -1)
Niels Möller's avatar
Niels Möller committed
120 121 122 123 124 125 126 127 128 129 130
    switch(option)
      {
      case 'p':
	port = optarg;
	break;
      case 'q':
	quiet_flag = 1;
	break;
      case 'd':
	debug_flag = 1;
	break;
131 132 133
      case 'i':
	host = optarg;
	break;
Niels Möller's avatar
Niels Möller committed
134 135 136
      case 'v':
	verbose_flag = 1;
	break;
Niels Möller's avatar
Niels Möller committed
137 138 139 140 141 142 143
      default:
	usage();
      }

  if ( (argc - optind) != 0)
    usage();

144
  if (!get_inaddr(&local, host, port, "tcp"))
Niels Möller's avatar
Niels Möller committed
145 146 147 148 149
    {
      fprintf(stderr, "No such host or service");
      exit(1);
    }

Niels Möller's avatar
Niels Möller committed
150
  if (!io_listen(&backend, &local, 
Niels Möller's avatar
Niels Möller committed
151
	    make_server_callback(&backend,
Niels Möller's avatar
Niels Möller committed
152
				 "lshd - a free ssh",
Niels Möller's avatar
Niels Möller committed
153 154 155 156 157
				 BLOCK_SIZE)))
    {
      werror("lsh: Connection failed: %s\n", strerror(errno));
      return 1;
    }
Niels Möller's avatar
Niels Möller committed
158
  
Niels Möller's avatar
Niels Möller committed
159
  io_run(&backend);
Niels Möller's avatar
Niels Möller committed
160 161 162

  return 0;
}