djm@openbsd.org | 930e8d2 | 2017-04-30 23:28:41 +0000 | [diff] [blame] | 1 | /* $OpenBSD: ssh-keyscan.c,v 1.113 2017/04/30 23:28:42 djm Exp $ */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>. |
| 4 | * |
| 5 | * Modification and redistribution in source and binary forms is |
| 6 | * permitted provided that due credit is given to the author and the |
Ben Lindstrom | a238f6e | 2001-06-09 01:30:39 +0000 | [diff] [blame] | 7 | * OpenBSD project by leaving this copyright notice intact. |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include "includes.h" |
Damien Miller | cd4223c | 2006-03-15 11:22:47 +1100 | [diff] [blame] | 11 | |
djm@openbsd.org | 48b68ce | 2014-12-11 08:20:09 +0000 | [diff] [blame] | 12 | #include <sys/types.h> |
Damien Miller | 9b48151 | 2002-09-12 10:43:29 +1000 | [diff] [blame] | 13 | #include "openbsd-compat/sys-queue.h" |
Damien Miller | cd4223c | 2006-03-15 11:22:47 +1100 | [diff] [blame] | 14 | #include <sys/resource.h> |
Damien Miller | 9aec919 | 2006-08-05 10:57:45 +1000 | [diff] [blame] | 15 | #ifdef HAVE_SYS_TIME_H |
| 16 | # include <sys/time.h> |
| 17 | #endif |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 18 | |
Darren Tucker | 46aa3e0 | 2006-09-02 15:32:40 +1000 | [diff] [blame] | 19 | #include <netinet/in.h> |
| 20 | #include <arpa/inet.h> |
| 21 | |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 22 | #include <openssl/bn.h> |
| 23 | |
Damien Miller | b8fe89c | 2006-07-24 14:51:00 +1000 | [diff] [blame] | 24 | #include <netdb.h> |
Darren Tucker | deecec9 | 2006-07-12 22:44:34 +1000 | [diff] [blame] | 25 | #include <errno.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 26 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 27 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 28 | #include <stdlib.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 29 | #include <signal.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 30 | #include <string.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 31 | #include <unistd.h> |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 32 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 33 | #include "xmalloc.h" |
| 34 | #include "ssh.h" |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 35 | #include "sshbuf.h" |
| 36 | #include "sshkey.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 37 | #include "cipher.h" |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 38 | #include "kex.h" |
| 39 | #include "compat.h" |
| 40 | #include "myproposal.h" |
| 41 | #include "packet.h" |
| 42 | #include "dispatch.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 43 | #include "log.h" |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 44 | #include "atomicio.h" |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 45 | #include "misc.h" |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 46 | #include "hostfile.h" |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 47 | #include "ssherr.h" |
| 48 | #include "ssh_api.h" |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 49 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 50 | /* Flag indicating whether IPv4 or IPv6. This can be set on the command line. |
| 51 | Default value is AF_UNSPEC means both IPv4 and IPv6. */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 52 | int IPv4or6 = AF_UNSPEC; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 53 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 54 | int ssh_port = SSH_DEFAULT_PORT; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 55 | |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 56 | #define KT_DSA (1) |
| 57 | #define KT_RSA (1<<1) |
| 58 | #define KT_ECDSA (1<<2) |
| 59 | #define KT_ED25519 (1<<3) |
| 60 | |
| 61 | #define KT_MIN KT_DSA |
| 62 | #define KT_MAX KT_ED25519 |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 63 | |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 64 | int get_cert = 0; |
Damien Miller | 1c7ef4b | 2014-04-20 12:59:46 +1000 | [diff] [blame] | 65 | int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 66 | |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 67 | int hash_hosts = 0; /* Hash hostname on output */ |
| 68 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 69 | #define MAXMAXFD 256 |
| 70 | |
| 71 | /* The number of seconds after which to give up on a TCP connection */ |
| 72 | int timeout = 5; |
| 73 | |
| 74 | int maxfd; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 75 | #define MAXCON (maxfd - 10) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 76 | |
Kevin Steves | ec84dc1 | 2000-12-13 17:45:15 +0000 | [diff] [blame] | 77 | extern char *__progname; |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 78 | fd_set *read_wait; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 79 | size_t read_wait_nfdset; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 80 | int ncon; |
| 81 | |
Damien Miller | ade31d7 | 2015-01-27 23:06:23 +1100 | [diff] [blame] | 82 | struct ssh *active_state = NULL; /* XXX needed for linking */ |
| 83 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 84 | /* |
| 85 | * Keep a connection structure for each file descriptor. The state |
| 86 | * associated with file descriptor n is held in fdcon[n]. |
| 87 | */ |
| 88 | typedef struct Connection { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 89 | u_char c_status; /* State of connection on this file desc. */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 90 | #define CS_UNUSED 0 /* File descriptor unused */ |
| 91 | #define CS_CON 1 /* Waiting to connect/read greeting */ |
| 92 | #define CS_SIZE 2 /* Waiting to read initial packet size */ |
| 93 | #define CS_KEYS 3 /* Waiting to read public key packet */ |
| 94 | int c_fd; /* Quick lookup: c->c_fd == c - fdcon */ |
| 95 | int c_plen; /* Packet length field for ssh packet */ |
| 96 | int c_len; /* Total bytes which must be read. */ |
| 97 | int c_off; /* Length of data read so far. */ |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 98 | int c_keytype; /* Only one of KT_* */ |
miod@openbsd.org | c265e2e | 2015-04-05 15:43:43 +0000 | [diff] [blame] | 99 | sig_atomic_t c_done; /* SSH2 done */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 100 | char *c_namebase; /* Address to free for c_name and c_namelist */ |
| 101 | char *c_name; /* Hostname of connection for errors */ |
| 102 | char *c_namelist; /* Pointer to other possible addresses */ |
| 103 | char *c_output_name; /* Hostname of connection for output */ |
| 104 | char *c_data; /* Data read from this fd */ |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 105 | struct ssh *c_ssh; /* SSH-connection */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 106 | struct timeval c_tv; /* Time at which connection gets aborted */ |
| 107 | TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */ |
| 108 | } con; |
| 109 | |
| 110 | TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */ |
| 111 | con *fdcon; |
| 112 | |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 113 | static void keyprint(con *c, struct sshkey *key); |
| 114 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 115 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 116 | fdlim_get(int hard) |
| 117 | { |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 118 | #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 119 | struct rlimit rlfd; |
Ben Lindstrom | b0a4cd8 | 2001-03-05 04:54:49 +0000 | [diff] [blame] | 120 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 121 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 122 | return (-1); |
| 123 | if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY) |
Damien Miller | e00074a | 2003-11-24 13:07:45 +1100 | [diff] [blame] | 124 | return SSH_SYSFDMAX; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 125 | else |
| 126 | return hard ? rlfd.rlim_max : rlfd.rlim_cur; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 127 | #else |
Damien Miller | e00074a | 2003-11-24 13:07:45 +1100 | [diff] [blame] | 128 | return SSH_SYSFDMAX; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 129 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 130 | } |
| 131 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 132 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 133 | fdlim_set(int lim) |
| 134 | { |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 135 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 136 | struct rlimit rlfd; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 137 | #endif |
Ben Lindstrom | 5c98db5 | 2002-07-07 22:25:29 +0000 | [diff] [blame] | 138 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 139 | if (lim <= 0) |
| 140 | return (-1); |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 141 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 142 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 143 | return (-1); |
| 144 | rlfd.rlim_cur = lim; |
| 145 | if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 146 | return (-1); |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 147 | #elif defined (HAVE_SETDTABLESIZE) |
Kevin Steves | 28a7f26 | 2001-02-05 15:43:59 +0000 | [diff] [blame] | 148 | setdtablesize(lim); |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 149 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 150 | return (0); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * This is an strsep function that returns a null field for adjacent |
| 155 | * separators. This is the same as the 4.4BSD strsep, but different from the |
| 156 | * one in the GNU libc. |
| 157 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 158 | static char * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 159 | xstrsep(char **str, const char *delim) |
| 160 | { |
| 161 | char *s, *e; |
| 162 | |
| 163 | if (!**str) |
| 164 | return (NULL); |
| 165 | |
| 166 | s = *str; |
| 167 | e = s + strcspn(s, delim); |
| 168 | |
| 169 | if (*e != '\0') |
| 170 | *e++ = '\0'; |
| 171 | *str = e; |
| 172 | |
| 173 | return (s); |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * Get the next non-null token (like GNU strsep). Strsep() will return a |
| 178 | * null token for two adjacent separators, so we may have to loop. |
| 179 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 180 | static char * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 181 | strnnsep(char **stringp, char *delim) |
| 182 | { |
| 183 | char *tok; |
| 184 | |
| 185 | do { |
| 186 | tok = xstrsep(stringp, delim); |
| 187 | } while (tok && *tok == '\0'); |
| 188 | return (tok); |
| 189 | } |
| 190 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 191 | |
| 192 | static int |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 193 | key_print_wrapper(struct sshkey *hostkey, struct ssh *ssh) |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 194 | { |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 195 | con *c; |
| 196 | |
| 197 | if ((c = ssh_get_app_data(ssh)) != NULL) |
| 198 | keyprint(c, hostkey); |
| 199 | /* always abort key exchange */ |
| 200 | return -1; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | static int |
| 204 | ssh2_capable(int remote_major, int remote_minor) |
| 205 | { |
| 206 | switch (remote_major) { |
| 207 | case 1: |
| 208 | if (remote_minor == 99) |
| 209 | return 1; |
| 210 | break; |
| 211 | case 2: |
| 212 | return 1; |
| 213 | default: |
| 214 | break; |
| 215 | } |
| 216 | return 0; |
| 217 | } |
| 218 | |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 219 | static void |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 220 | keygrab_ssh2(con *c) |
| 221 | { |
Damien Miller | 9235a03 | 2014-04-20 13:17:20 +1000 | [diff] [blame] | 222 | char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT }; |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 223 | int r; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 224 | |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 225 | switch (c->c_keytype) { |
| 226 | case KT_DSA: |
| 227 | myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ? |
| 228 | "ssh-dss-cert-v01@openssh.com" : "ssh-dss"; |
| 229 | break; |
| 230 | case KT_RSA: |
| 231 | myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ? |
| 232 | "ssh-rsa-cert-v01@openssh.com" : "ssh-rsa"; |
| 233 | break; |
| 234 | case KT_ED25519: |
| 235 | myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ? |
| 236 | "ssh-ed25519-cert-v01@openssh.com" : "ssh-ed25519"; |
| 237 | break; |
| 238 | case KT_ECDSA: |
| 239 | myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ? |
| 240 | "ecdsa-sha2-nistp256-cert-v01@openssh.com," |
| 241 | "ecdsa-sha2-nistp384-cert-v01@openssh.com," |
| 242 | "ecdsa-sha2-nistp521-cert-v01@openssh.com" : |
| 243 | "ecdsa-sha2-nistp256," |
| 244 | "ecdsa-sha2-nistp384," |
| 245 | "ecdsa-sha2-nistp521"; |
| 246 | break; |
| 247 | default: |
| 248 | fatal("unknown key type %d", c->c_keytype); |
| 249 | break; |
| 250 | } |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 251 | if ((r = kex_setup(c->c_ssh, myproposal)) != 0) { |
| 252 | free(c->c_ssh); |
| 253 | fprintf(stderr, "kex_setup: %s\n", ssh_err(r)); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 254 | exit(1); |
| 255 | } |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 256 | #ifdef WITH_OPENSSL |
| 257 | c->c_ssh->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; |
| 258 | c->c_ssh->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; |
djm@openbsd.org | 0e8eeec | 2016-05-02 10:26:04 +0000 | [diff] [blame] | 259 | c->c_ssh->kex->kex[KEX_DH_GRP14_SHA256] = kexdh_client; |
| 260 | c->c_ssh->kex->kex[KEX_DH_GRP16_SHA512] = kexdh_client; |
| 261 | c->c_ssh->kex->kex[KEX_DH_GRP18_SHA512] = kexdh_client; |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 262 | c->c_ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; |
| 263 | c->c_ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; |
Darren Tucker | f2004cd | 2015-02-23 05:04:21 +1100 | [diff] [blame] | 264 | # ifdef OPENSSL_HAS_ECC |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 265 | c->c_ssh->kex->kex[KEX_ECDH_SHA2] = kexecdh_client; |
Darren Tucker | f2004cd | 2015-02-23 05:04:21 +1100 | [diff] [blame] | 266 | # endif |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 267 | #endif |
| 268 | c->c_ssh->kex->kex[KEX_C25519_SHA256] = kexc25519_client; |
| 269 | ssh_set_verify_host_key_callback(c->c_ssh, key_print_wrapper); |
| 270 | /* |
| 271 | * do the key-exchange until an error occurs or until |
| 272 | * the key_print_wrapper() callback sets c_done. |
| 273 | */ |
| 274 | ssh_dispatch_run(c->c_ssh, DISPATCH_BLOCK, &c->c_done, c->c_ssh); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | static void |
djm@openbsd.org | 8a28344 | 2017-03-10 03:18:24 +0000 | [diff] [blame] | 278 | keyprint_one(const char *host, struct sshkey *key) |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 279 | { |
djm@openbsd.org | 9ada37d | 2015-10-24 22:56:19 +0000 | [diff] [blame] | 280 | char *hostport; |
djm@openbsd.org | 8a28344 | 2017-03-10 03:18:24 +0000 | [diff] [blame] | 281 | const char *known_host, *hashed; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 282 | |
djm@openbsd.org | 2c2cfe1 | 2015-04-10 00:08:55 +0000 | [diff] [blame] | 283 | hostport = put_host_port(host, ssh_port); |
djm@openbsd.org | db25972 | 2017-03-10 04:26:06 +0000 | [diff] [blame] | 284 | lowercase(hostport); |
djm@openbsd.org | 8a28344 | 2017-03-10 03:18:24 +0000 | [diff] [blame] | 285 | if (hash_hosts && (hashed = host_hash(host, NULL, 0)) == NULL) |
| 286 | fatal("host_hash failed"); |
| 287 | known_host = hash_hosts ? hashed : hostport; |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 288 | if (!get_cert) |
djm@openbsd.org | 8a28344 | 2017-03-10 03:18:24 +0000 | [diff] [blame] | 289 | fprintf(stdout, "%s ", known_host); |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 290 | sshkey_write(key, stdout); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 291 | fputs("\n", stdout); |
djm@openbsd.org | 2c2cfe1 | 2015-04-10 00:08:55 +0000 | [diff] [blame] | 292 | free(hostport); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 293 | } |
| 294 | |
djm@openbsd.org | 9ada37d | 2015-10-24 22:56:19 +0000 | [diff] [blame] | 295 | static void |
| 296 | keyprint(con *c, struct sshkey *key) |
| 297 | { |
| 298 | char *hosts = c->c_output_name ? c->c_output_name : c->c_name; |
| 299 | char *host, *ohosts; |
| 300 | |
| 301 | if (key == NULL) |
| 302 | return; |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 303 | if (get_cert || (!hash_hosts && ssh_port == SSH_DEFAULT_PORT)) { |
djm@openbsd.org | 9ada37d | 2015-10-24 22:56:19 +0000 | [diff] [blame] | 304 | keyprint_one(hosts, key); |
| 305 | return; |
| 306 | } |
| 307 | ohosts = hosts = xstrdup(hosts); |
| 308 | while ((host = strsep(&hosts, ",")) != NULL) |
| 309 | keyprint_one(host, key); |
| 310 | free(ohosts); |
| 311 | } |
| 312 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 313 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 314 | tcpconnect(char *host) |
| 315 | { |
| 316 | struct addrinfo hints, *ai, *aitop; |
| 317 | char strport[NI_MAXSERV]; |
| 318 | int gaierr, s = -1; |
| 319 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 320 | snprintf(strport, sizeof strport, "%d", ssh_port); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 321 | memset(&hints, 0, sizeof(hints)); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 322 | hints.ai_family = IPv4or6; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 323 | hints.ai_socktype = SOCK_STREAM; |
djm@openbsd.org | fae7bbe | 2015-01-28 21:15:47 +0000 | [diff] [blame] | 324 | if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) { |
| 325 | error("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr)); |
| 326 | return -1; |
| 327 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 328 | for (ai = aitop; ai; ai = ai->ai_next) { |
Darren Tucker | 7bd98e7 | 2010-01-10 10:31:12 +1100 | [diff] [blame] | 329 | s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 330 | if (s < 0) { |
| 331 | error("socket: %s", strerror(errno)); |
| 332 | continue; |
| 333 | } |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 334 | if (set_nonblock(s) == -1) |
| 335 | fatal("%s: set_nonblock(%d)", __func__, s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 336 | if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 && |
| 337 | errno != EINPROGRESS) |
| 338 | error("connect (`%s'): %s", host, strerror(errno)); |
| 339 | else |
| 340 | break; |
| 341 | close(s); |
| 342 | s = -1; |
| 343 | } |
| 344 | freeaddrinfo(aitop); |
| 345 | return s; |
| 346 | } |
| 347 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 348 | static int |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 349 | conalloc(char *iname, char *oname, int keytype) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 350 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 351 | char *namebase, *name, *namelist; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 352 | int s; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 353 | |
| 354 | namebase = namelist = xstrdup(iname); |
| 355 | |
| 356 | do { |
| 357 | name = xstrsep(&namelist, ","); |
| 358 | if (!name) { |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 359 | free(namebase); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 360 | return (-1); |
| 361 | } |
| 362 | } while ((s = tcpconnect(name)) < 0); |
| 363 | |
| 364 | if (s >= maxfd) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 365 | fatal("conalloc: fdno %d too high", s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 366 | if (fdcon[s].c_status) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 367 | fatal("conalloc: attempt to reuse fdno %d", s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 368 | |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 369 | debug3("%s: oname %s kt %d", __func__, oname, keytype); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 370 | fdcon[s].c_fd = s; |
| 371 | fdcon[s].c_status = CS_CON; |
| 372 | fdcon[s].c_namebase = namebase; |
| 373 | fdcon[s].c_name = name; |
| 374 | fdcon[s].c_namelist = namelist; |
| 375 | fdcon[s].c_output_name = xstrdup(oname); |
| 376 | fdcon[s].c_data = (char *) &fdcon[s].c_plen; |
| 377 | fdcon[s].c_len = 4; |
| 378 | fdcon[s].c_off = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 379 | fdcon[s].c_keytype = keytype; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 380 | gettimeofday(&fdcon[s].c_tv, NULL); |
| 381 | fdcon[s].c_tv.tv_sec += timeout; |
| 382 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 383 | FD_SET(s, read_wait); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 384 | ncon++; |
| 385 | return (s); |
| 386 | } |
| 387 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 388 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 389 | confree(int s) |
| 390 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 391 | if (s >= maxfd || fdcon[s].c_status == CS_UNUSED) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 392 | fatal("confree: attempt to free bad fdno %d", s); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 393 | close(s); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 394 | free(fdcon[s].c_namebase); |
| 395 | free(fdcon[s].c_output_name); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 396 | if (fdcon[s].c_status == CS_KEYS) |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 397 | free(fdcon[s].c_data); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 398 | fdcon[s].c_status = CS_UNUSED; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 399 | fdcon[s].c_keytype = 0; |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 400 | if (fdcon[s].c_ssh) { |
| 401 | ssh_packet_close(fdcon[s].c_ssh); |
| 402 | free(fdcon[s].c_ssh); |
| 403 | fdcon[s].c_ssh = NULL; |
| 404 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 405 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 406 | FD_CLR(s, read_wait); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 407 | ncon--; |
| 408 | } |
| 409 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 410 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 411 | contouch(int s) |
| 412 | { |
| 413 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); |
| 414 | gettimeofday(&fdcon[s].c_tv, NULL); |
| 415 | fdcon[s].c_tv.tv_sec += timeout; |
| 416 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); |
| 417 | } |
| 418 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 419 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 420 | conrecycle(int s) |
| 421 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 422 | con *c = &fdcon[s]; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 423 | int ret; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 424 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 425 | ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 426 | confree(s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 427 | return (ret); |
| 428 | } |
| 429 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 430 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 431 | congreet(int s) |
| 432 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 433 | int n = 0, remote_major = 0, remote_minor = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 434 | char buf[256], *cp; |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 435 | char remote_version[sizeof buf]; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 436 | size_t bufsiz; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 437 | con *c = &fdcon[s]; |
| 438 | |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 439 | /* send client banner */ |
| 440 | n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n", |
| 441 | PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2); |
| 442 | if (n < 0 || (size_t)n >= sizeof(buf)) { |
| 443 | error("snprintf: buffer too small"); |
| 444 | confree(s); |
| 445 | return; |
| 446 | } |
| 447 | if (atomicio(vwrite, s, buf, n) != (size_t)n) { |
| 448 | error("write (%s): %s", c->c_name, strerror(errno)); |
| 449 | confree(s); |
| 450 | return; |
| 451 | } |
| 452 | |
Damien Miller | 4bbacb7 | 2005-11-05 15:12:28 +1100 | [diff] [blame] | 453 | for (;;) { |
| 454 | memset(buf, '\0', sizeof(buf)); |
| 455 | bufsiz = sizeof(buf); |
| 456 | cp = buf; |
| 457 | while (bufsiz-- && |
| 458 | (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') { |
| 459 | if (*cp == '\r') |
| 460 | *cp = '\n'; |
| 461 | cp++; |
| 462 | } |
| 463 | if (n != 1 || strncmp(buf, "SSH-", 4) == 0) |
| 464 | break; |
Ben Lindstrom | de8fc6f | 2001-08-06 22:43:50 +0000 | [diff] [blame] | 465 | } |
Ben Lindstrom | 6b28c35 | 2002-03-05 01:54:52 +0000 | [diff] [blame] | 466 | if (n == 0) { |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 467 | switch (errno) { |
| 468 | case EPIPE: |
| 469 | error("%s: Connection closed by remote host", c->c_name); |
| 470 | break; |
| 471 | case ECONNREFUSED: |
| 472 | break; |
| 473 | default: |
| 474 | error("read (%s): %s", c->c_name, strerror(errno)); |
| 475 | break; |
| 476 | } |
Ben Lindstrom | 6b28c35 | 2002-03-05 01:54:52 +0000 | [diff] [blame] | 477 | conrecycle(s); |
| 478 | return; |
| 479 | } |
Ben Lindstrom | 884a4ac | 2001-03-06 03:33:04 +0000 | [diff] [blame] | 480 | if (*cp != '\n' && *cp != '\r') { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 481 | error("%s: bad greeting", c->c_name); |
| 482 | confree(s); |
| 483 | return; |
| 484 | } |
Ben Lindstrom | 884a4ac | 2001-03-06 03:33:04 +0000 | [diff] [blame] | 485 | *cp = '\0'; |
djm@openbsd.org | 4509b5d | 2015-01-30 01:13:33 +0000 | [diff] [blame] | 486 | if ((c->c_ssh = ssh_packet_set_connection(NULL, s, s)) == NULL) |
| 487 | fatal("ssh_packet_set_connection failed"); |
djm@openbsd.org | 802660c | 2015-01-30 10:44:49 +0000 | [diff] [blame] | 488 | ssh_packet_set_timeout(c->c_ssh, timeout, 1); |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 489 | ssh_set_app_data(c->c_ssh, c); /* back link */ |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 490 | if (sscanf(buf, "SSH-%d.%d-%[^\n]\n", |
| 491 | &remote_major, &remote_minor, remote_version) == 3) |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 492 | c->c_ssh->compat = compat_datafellows(remote_version); |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 493 | else |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 494 | c->c_ssh->compat = 0; |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 495 | if (!ssh2_capable(remote_major, remote_minor)) { |
| 496 | debug("%s doesn't support ssh2", c->c_name); |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 497 | confree(s); |
| 498 | return; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 499 | } |
djm@openbsd.org | 2c2cfe1 | 2015-04-10 00:08:55 +0000 | [diff] [blame] | 500 | fprintf(stderr, "# %s:%d %s\n", c->c_name, ssh_port, chop(buf)); |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 501 | keygrab_ssh2(c); |
| 502 | confree(s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 503 | } |
| 504 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 505 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 506 | conread(int s) |
| 507 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 508 | con *c = &fdcon[s]; |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 509 | size_t n; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 510 | |
| 511 | if (c->c_status == CS_CON) { |
| 512 | congreet(s); |
| 513 | return; |
| 514 | } |
Darren Tucker | fe6649d | 2004-08-13 21:19:37 +1000 | [diff] [blame] | 515 | n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off); |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 516 | if (n == 0) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 517 | error("read (%s): %s", c->c_name, strerror(errno)); |
| 518 | confree(s); |
| 519 | return; |
| 520 | } |
| 521 | c->c_off += n; |
| 522 | |
| 523 | if (c->c_off == c->c_len) |
| 524 | switch (c->c_status) { |
| 525 | case CS_SIZE: |
| 526 | c->c_plen = htonl(c->c_plen); |
| 527 | c->c_len = c->c_plen + 8 - (c->c_plen & 7); |
| 528 | c->c_off = 0; |
| 529 | c->c_data = xmalloc(c->c_len); |
| 530 | c->c_status = CS_KEYS; |
| 531 | break; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 532 | default: |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 533 | fatal("conread: invalid status %d", c->c_status); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 534 | break; |
| 535 | } |
| 536 | |
| 537 | contouch(s); |
| 538 | } |
| 539 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 540 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 541 | conloop(void) |
| 542 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 543 | struct timeval seltime, now; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 544 | fd_set *r, *e; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 545 | con *c; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 546 | int i; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 547 | |
| 548 | gettimeofday(&now, NULL); |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 549 | c = TAILQ_FIRST(&tq); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 550 | |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 551 | if (c && (c->c_tv.tv_sec > now.tv_sec || |
| 552 | (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 553 | seltime = c->c_tv; |
| 554 | seltime.tv_sec -= now.tv_sec; |
| 555 | seltime.tv_usec -= now.tv_usec; |
Ben Lindstrom | c791beb | 2001-02-10 23:18:11 +0000 | [diff] [blame] | 556 | if (seltime.tv_usec < 0) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 557 | seltime.tv_usec += 1000000; |
| 558 | seltime.tv_sec--; |
| 559 | } |
| 560 | } else |
Damien Miller | c5219e7 | 2011-05-05 14:05:12 +1000 | [diff] [blame] | 561 | timerclear(&seltime); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 562 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 563 | r = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
| 564 | e = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
| 565 | memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask)); |
| 566 | memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask)); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 567 | |
| 568 | while (select(maxfd, r, NULL, e, &seltime) == -1 && |
Damien Miller | d8968ad | 2008-07-04 23:10:49 +1000 | [diff] [blame] | 569 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 570 | ; |
| 571 | |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 572 | for (i = 0; i < maxfd; i++) { |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 573 | if (FD_ISSET(i, e)) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 574 | error("%s: exception!", fdcon[i].c_name); |
| 575 | confree(i); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 576 | } else if (FD_ISSET(i, r)) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 577 | conread(i); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 578 | } |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 579 | free(r); |
| 580 | free(e); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 581 | |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 582 | c = TAILQ_FIRST(&tq); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 583 | while (c && (c->c_tv.tv_sec < now.tv_sec || |
| 584 | (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 585 | int s = c->c_fd; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 586 | |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 587 | c = TAILQ_NEXT(c, c_link); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 588 | conrecycle(s); |
| 589 | } |
| 590 | } |
| 591 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 592 | static void |
| 593 | do_host(char *host) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 594 | { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 595 | char *name = strnnsep(&host, " \t\n"); |
| 596 | int j; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 597 | |
Ben Lindstrom | eaffb9d | 2001-12-06 16:28:19 +0000 | [diff] [blame] | 598 | if (name == NULL) |
| 599 | return; |
djm@openbsd.org | 873d3e7 | 2017-04-30 23:18:44 +0000 | [diff] [blame] | 600 | for (j = KT_MIN; j <= KT_MAX; j *= 2) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 601 | if (get_keytypes & j) { |
| 602 | while (ncon >= MAXCON) |
| 603 | conloop(); |
| 604 | conalloc(name, *host ? host : name, j); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 605 | } |
| 606 | } |
| 607 | } |
| 608 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 609 | void |
| 610 | fatal(const char *fmt,...) |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 611 | { |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 612 | va_list args; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 613 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 614 | va_start(args, fmt); |
| 615 | do_log(SYSLOG_LEVEL_FATAL, fmt, args); |
| 616 | va_end(args); |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 617 | exit(255); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 621 | usage(void) |
| 622 | { |
Damien Miller | c1719f7 | 2008-11-03 19:27:07 +1100 | [diff] [blame] | 623 | fprintf(stderr, |
jmc@openbsd.org | e72a857 | 2015-11-08 23:24:03 +0000 | [diff] [blame] | 624 | "usage: %s [-46cHv] [-f file] [-p port] [-T timeout] [-t type]\n" |
Darren Tucker | 7bd98e7 | 2010-01-10 10:31:12 +1100 | [diff] [blame] | 625 | "\t\t [host | addrlist namelist] ...\n", |
Ben Lindstrom | ddfb1e3 | 2001-08-06 22:06:35 +0000 | [diff] [blame] | 626 | __progname); |
Ben Lindstrom | ddfb1e3 | 2001-08-06 22:06:35 +0000 | [diff] [blame] | 627 | exit(1); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | int |
| 631 | main(int argc, char **argv) |
| 632 | { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 633 | int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO; |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 634 | int opt, fopt_count = 0, j; |
| 635 | char *tname, *cp, line[NI_MAXHOST]; |
| 636 | FILE *fp; |
| 637 | u_long linenum; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 638 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 639 | extern int optind; |
| 640 | extern char *optarg; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 641 | |
dtucker@openbsd.org | ffb1e7e | 2016-02-15 09:47:49 +0000 | [diff] [blame] | 642 | ssh_malloc_init(); /* must be called before any mallocs */ |
Damien Miller | 59d3d5b | 2003-08-22 09:34:41 +1000 | [diff] [blame] | 643 | __progname = ssh_get_progname(argv[0]); |
Ben Lindstrom | 4e088e4 | 2001-10-10 20:45:43 +0000 | [diff] [blame] | 644 | seed_rng(); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 645 | TAILQ_INIT(&tq); |
| 646 | |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 647 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
| 648 | sanitise_stdfd(); |
| 649 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 650 | if (argc <= 1) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 651 | usage(); |
| 652 | |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 653 | while ((opt = getopt(argc, argv, "cHv46p:T:t:f:")) != -1) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 654 | switch (opt) { |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 655 | case 'H': |
| 656 | hash_hosts = 1; |
| 657 | break; |
djm@openbsd.org | 3a424cd | 2015-11-08 22:30:20 +0000 | [diff] [blame] | 658 | case 'c': |
| 659 | get_cert = 1; |
| 660 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 661 | case 'p': |
| 662 | ssh_port = a2port(optarg); |
Damien Miller | 3dc71ad | 2009-01-28 16:31:22 +1100 | [diff] [blame] | 663 | if (ssh_port <= 0) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 664 | fprintf(stderr, "Bad port '%s'\n", optarg); |
| 665 | exit(1); |
| 666 | } |
| 667 | break; |
| 668 | case 'T': |
Ben Lindstrom | edd098b | 2002-07-04 00:07:13 +0000 | [diff] [blame] | 669 | timeout = convtime(optarg); |
| 670 | if (timeout == -1 || timeout == 0) { |
| 671 | fprintf(stderr, "Bad timeout '%s'\n", optarg); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 672 | usage(); |
Ben Lindstrom | edd098b | 2002-07-04 00:07:13 +0000 | [diff] [blame] | 673 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 674 | break; |
| 675 | case 'v': |
| 676 | if (!debug_flag) { |
| 677 | debug_flag = 1; |
| 678 | log_level = SYSLOG_LEVEL_DEBUG1; |
| 679 | } |
| 680 | else if (log_level < SYSLOG_LEVEL_DEBUG3) |
| 681 | log_level++; |
| 682 | else |
| 683 | fatal("Too high debugging level."); |
| 684 | break; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 685 | case 'f': |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 686 | if (strcmp(optarg, "-") == 0) |
| 687 | optarg = NULL; |
| 688 | argv[fopt_count++] = optarg; |
| 689 | break; |
| 690 | case 't': |
| 691 | get_keytypes = 0; |
| 692 | tname = strtok(optarg, ","); |
| 693 | while (tname) { |
markus@openbsd.org | 3f79765 | 2015-01-19 20:32:39 +0000 | [diff] [blame] | 694 | int type = sshkey_type_from_name(tname); |
djm@openbsd.org | f89b928 | 2017-01-06 03:41:58 +0000 | [diff] [blame] | 695 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 696 | switch (type) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 697 | case KEY_DSA: |
| 698 | get_keytypes |= KT_DSA; |
| 699 | break; |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 700 | case KEY_ECDSA: |
| 701 | get_keytypes |= KT_ECDSA; |
| 702 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 703 | case KEY_RSA: |
| 704 | get_keytypes |= KT_RSA; |
| 705 | break; |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 706 | case KEY_ED25519: |
| 707 | get_keytypes |= KT_ED25519; |
| 708 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 709 | case KEY_UNSPEC: |
djm@openbsd.org | f89b928 | 2017-01-06 03:41:58 +0000 | [diff] [blame] | 710 | default: |
| 711 | fatal("Unknown key type \"%s\"", tname); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 712 | } |
| 713 | tname = strtok(NULL, ","); |
| 714 | } |
| 715 | break; |
| 716 | case '4': |
| 717 | IPv4or6 = AF_INET; |
| 718 | break; |
| 719 | case '6': |
| 720 | IPv4or6 = AF_INET6; |
| 721 | break; |
| 722 | case '?': |
| 723 | default: |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 724 | usage(); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 725 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 726 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 727 | if (optind == argc && !fopt_count) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 728 | usage(); |
| 729 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 730 | log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 731 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 732 | maxfd = fdlim_get(1); |
| 733 | if (maxfd < 0) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 734 | fatal("%s: fdlim_get: bad value", __progname); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 735 | if (maxfd > MAXMAXFD) |
| 736 | maxfd = MAXMAXFD; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 737 | if (MAXCON <= 0) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 738 | fatal("%s: not enough file descriptors", __progname); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 739 | if (maxfd > fdlim_get(0)) |
| 740 | fdlim_set(maxfd); |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 741 | fdcon = xcalloc(maxfd, sizeof(con)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 742 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 743 | read_wait_nfdset = howmany(maxfd, NFDBITS); |
| 744 | read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 745 | |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 746 | for (j = 0; j < fopt_count; j++) { |
| 747 | if (argv[j] == NULL) |
| 748 | fp = stdin; |
| 749 | else if ((fp = fopen(argv[j], "r")) == NULL) |
| 750 | fatal("%s: %s: %s", __progname, argv[j], |
| 751 | strerror(errno)); |
| 752 | linenum = 0; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 753 | |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 754 | while (read_keyfile_line(fp, |
| 755 | argv[j] == NULL ? "(stdin)" : argv[j], line, sizeof(line), |
| 756 | &linenum) != -1) { |
| 757 | /* Chomp off trailing whitespace and comments */ |
| 758 | if ((cp = strchr(line, '#')) == NULL) |
| 759 | cp = line + strlen(line) - 1; |
| 760 | while (cp >= line) { |
| 761 | if (*cp == ' ' || *cp == '\t' || |
| 762 | *cp == '\n' || *cp == '#') |
| 763 | *cp-- = '\0'; |
| 764 | else |
| 765 | break; |
| 766 | } |
| 767 | |
| 768 | /* Skip empty lines */ |
| 769 | if (*line == '\0') |
Ben Lindstrom | 78bbd9e | 2001-09-12 17:10:40 +0000 | [diff] [blame] | 770 | continue; |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 771 | |
| 772 | do_host(line); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 773 | } |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 774 | |
| 775 | if (ferror(fp)) |
| 776 | fatal("%s: %s: %s", __progname, argv[j], |
| 777 | strerror(errno)); |
| 778 | |
| 779 | fclose(fp); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 780 | } |
| 781 | |
| 782 | while (optind < argc) |
| 783 | do_host(argv[optind++]); |
| 784 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 785 | while (ncon > 0) |
| 786 | conloop(); |
| 787 | |
| 788 | return (0); |
| 789 | } |