djm@openbsd.org | 48b68ce | 2014-12-11 08:20:09 +0000 | [diff] [blame] | 1 | /* $OpenBSD: ssh-keyscan.c,v 1.93 2014/12/11 08:20:09 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> |
| 13 | #include <sys/param.h> |
Damien Miller | 9b48151 | 2002-09-12 10:43:29 +1000 | [diff] [blame] | 14 | #include "openbsd-compat/sys-queue.h" |
Damien Miller | cd4223c | 2006-03-15 11:22:47 +1100 | [diff] [blame] | 15 | #include <sys/resource.h> |
Damien Miller | 9aec919 | 2006-08-05 10:57:45 +1000 | [diff] [blame] | 16 | #ifdef HAVE_SYS_TIME_H |
| 17 | # include <sys/time.h> |
| 18 | #endif |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 19 | |
Darren Tucker | 46aa3e0 | 2006-09-02 15:32:40 +1000 | [diff] [blame] | 20 | #include <netinet/in.h> |
| 21 | #include <arpa/inet.h> |
| 22 | |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 23 | #include <openssl/bn.h> |
| 24 | |
Damien Miller | b8fe89c | 2006-07-24 14:51:00 +1000 | [diff] [blame] | 25 | #include <netdb.h> |
Darren Tucker | deecec9 | 2006-07-12 22:44:34 +1000 | [diff] [blame] | 26 | #include <errno.h> |
Damien Miller | be43ebf | 2006-07-24 13:51:51 +1000 | [diff] [blame] | 27 | #include <setjmp.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 28 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 29 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 30 | #include <stdlib.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 31 | #include <signal.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 32 | #include <string.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 33 | #include <unistd.h> |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 34 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 35 | #include "xmalloc.h" |
| 36 | #include "ssh.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 37 | #include "ssh1.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 38 | #include "buffer.h" |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 39 | #include "key.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 40 | #include "cipher.h" |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 41 | #include "kex.h" |
| 42 | #include "compat.h" |
| 43 | #include "myproposal.h" |
| 44 | #include "packet.h" |
| 45 | #include "dispatch.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 46 | #include "log.h" |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 47 | #include "atomicio.h" |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 48 | #include "misc.h" |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 49 | #include "hostfile.h" |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 50 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 51 | /* Flag indicating whether IPv4 or IPv6. This can be set on the command line. |
| 52 | Default value is AF_UNSPEC means both IPv4 and IPv6. */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 53 | int IPv4or6 = AF_UNSPEC; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 54 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 55 | int ssh_port = SSH_DEFAULT_PORT; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 56 | |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 57 | #define KT_RSA1 1 |
| 58 | #define KT_DSA 2 |
| 59 | #define KT_RSA 4 |
| 60 | #define KT_ECDSA 8 |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 61 | #define KT_ED25519 16 |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 62 | |
Damien Miller | 1c7ef4b | 2014-04-20 12:59:46 +1000 | [diff] [blame] | 63 | int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 64 | |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 65 | int hash_hosts = 0; /* Hash hostname on output */ |
| 66 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 67 | #define MAXMAXFD 256 |
| 68 | |
| 69 | /* The number of seconds after which to give up on a TCP connection */ |
| 70 | int timeout = 5; |
| 71 | |
| 72 | int maxfd; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 73 | #define MAXCON (maxfd - 10) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 74 | |
Kevin Steves | ec84dc1 | 2000-12-13 17:45:15 +0000 | [diff] [blame] | 75 | extern char *__progname; |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 76 | fd_set *read_wait; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 77 | size_t read_wait_nfdset; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 78 | int ncon; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 79 | int nonfatal_fatal = 0; |
| 80 | jmp_buf kexjmp; |
Ben Lindstrom | 520b55c | 2001-09-12 18:05:05 +0000 | [diff] [blame] | 81 | Key *kexjmp_key; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 82 | |
| 83 | /* |
| 84 | * Keep a connection structure for each file descriptor. The state |
| 85 | * associated with file descriptor n is held in fdcon[n]. |
| 86 | */ |
| 87 | typedef struct Connection { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 88 | u_char c_status; /* State of connection on this file desc. */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 89 | #define CS_UNUSED 0 /* File descriptor unused */ |
| 90 | #define CS_CON 1 /* Waiting to connect/read greeting */ |
| 91 | #define CS_SIZE 2 /* Waiting to read initial packet size */ |
| 92 | #define CS_KEYS 3 /* Waiting to read public key packet */ |
| 93 | int c_fd; /* Quick lookup: c->c_fd == c - fdcon */ |
| 94 | int c_plen; /* Packet length field for ssh packet */ |
| 95 | int c_len; /* Total bytes which must be read. */ |
| 96 | int c_off; /* Length of data read so far. */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 97 | int c_keytype; /* Only one of KT_RSA1, KT_DSA, or KT_RSA */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 98 | char *c_namebase; /* Address to free for c_name and c_namelist */ |
| 99 | char *c_name; /* Hostname of connection for errors */ |
| 100 | char *c_namelist; /* Pointer to other possible addresses */ |
| 101 | char *c_output_name; /* Hostname of connection for output */ |
| 102 | char *c_data; /* Data read from this fd */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 103 | Kex *c_kex; /* The key-exchange struct for ssh2 */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 104 | struct timeval c_tv; /* Time at which connection gets aborted */ |
| 105 | TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */ |
| 106 | } con; |
| 107 | |
| 108 | TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */ |
| 109 | con *fdcon; |
| 110 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 111 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 112 | fdlim_get(int hard) |
| 113 | { |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 114 | #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 115 | struct rlimit rlfd; |
Ben Lindstrom | b0a4cd8 | 2001-03-05 04:54:49 +0000 | [diff] [blame] | 116 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 117 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 118 | return (-1); |
| 119 | if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY) |
Damien Miller | e00074a | 2003-11-24 13:07:45 +1100 | [diff] [blame] | 120 | return SSH_SYSFDMAX; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 121 | else |
| 122 | return hard ? rlfd.rlim_max : rlfd.rlim_cur; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 123 | #else |
Damien Miller | e00074a | 2003-11-24 13:07:45 +1100 | [diff] [blame] | 124 | return SSH_SYSFDMAX; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 125 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 126 | } |
| 127 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 128 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 129 | fdlim_set(int lim) |
| 130 | { |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 131 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 132 | struct rlimit rlfd; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 133 | #endif |
Ben Lindstrom | 5c98db5 | 2002-07-07 22:25:29 +0000 | [diff] [blame] | 134 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 135 | if (lim <= 0) |
| 136 | return (-1); |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 137 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 138 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 139 | return (-1); |
| 140 | rlfd.rlim_cur = lim; |
| 141 | if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 142 | return (-1); |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 143 | #elif defined (HAVE_SETDTABLESIZE) |
Kevin Steves | 28a7f26 | 2001-02-05 15:43:59 +0000 | [diff] [blame] | 144 | setdtablesize(lim); |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 145 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 146 | return (0); |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * This is an strsep function that returns a null field for adjacent |
| 151 | * separators. This is the same as the 4.4BSD strsep, but different from the |
| 152 | * one in the GNU libc. |
| 153 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 154 | static char * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 155 | xstrsep(char **str, const char *delim) |
| 156 | { |
| 157 | char *s, *e; |
| 158 | |
| 159 | if (!**str) |
| 160 | return (NULL); |
| 161 | |
| 162 | s = *str; |
| 163 | e = s + strcspn(s, delim); |
| 164 | |
| 165 | if (*e != '\0') |
| 166 | *e++ = '\0'; |
| 167 | *str = e; |
| 168 | |
| 169 | return (s); |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Get the next non-null token (like GNU strsep). Strsep() will return a |
| 174 | * null token for two adjacent separators, so we may have to loop. |
| 175 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 176 | static char * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 177 | strnnsep(char **stringp, char *delim) |
| 178 | { |
| 179 | char *tok; |
| 180 | |
| 181 | do { |
| 182 | tok = xstrsep(stringp, delim); |
| 183 | } while (tok && *tok == '\0'); |
| 184 | return (tok); |
| 185 | } |
| 186 | |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 187 | #ifdef WITH_SSH1 |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 188 | static Key * |
| 189 | keygrab_ssh1(con *c) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 190 | { |
| 191 | static Key *rsa; |
| 192 | static Buffer msg; |
| 193 | |
| 194 | if (rsa == NULL) { |
| 195 | buffer_init(&msg); |
| 196 | rsa = key_new(KEY_RSA1); |
| 197 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 198 | buffer_append(&msg, c->c_data, c->c_plen); |
| 199 | buffer_consume(&msg, 8 - (c->c_plen & 7)); /* padding */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 200 | if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 201 | error("%s: invalid packet type", c->c_name); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 202 | buffer_clear(&msg); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 203 | return NULL; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 204 | } |
| 205 | buffer_consume(&msg, 8); /* cookie */ |
| 206 | |
| 207 | /* server key */ |
| 208 | (void) buffer_get_int(&msg); |
| 209 | buffer_get_bignum(&msg, rsa->rsa->e); |
| 210 | buffer_get_bignum(&msg, rsa->rsa->n); |
| 211 | |
| 212 | /* host key */ |
| 213 | (void) buffer_get_int(&msg); |
| 214 | buffer_get_bignum(&msg, rsa->rsa->e); |
| 215 | buffer_get_bignum(&msg, rsa->rsa->n); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 216 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 217 | buffer_clear(&msg); |
| 218 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 219 | return (rsa); |
| 220 | } |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 221 | #endif |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 222 | |
| 223 | static int |
| 224 | hostjump(Key *hostkey) |
| 225 | { |
Ben Lindstrom | 520b55c | 2001-09-12 18:05:05 +0000 | [diff] [blame] | 226 | kexjmp_key = hostkey; |
| 227 | longjmp(kexjmp, 1); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | static int |
| 231 | ssh2_capable(int remote_major, int remote_minor) |
| 232 | { |
| 233 | switch (remote_major) { |
| 234 | case 1: |
| 235 | if (remote_minor == 99) |
| 236 | return 1; |
| 237 | break; |
| 238 | case 2: |
| 239 | return 1; |
| 240 | default: |
| 241 | break; |
| 242 | } |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static Key * |
| 247 | keygrab_ssh2(con *c) |
| 248 | { |
Damien Miller | 9235a03 | 2014-04-20 13:17:20 +1000 | [diff] [blame] | 249 | char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT }; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 250 | int j; |
| 251 | |
| 252 | packet_set_connection(c->c_fd, c->c_fd); |
| 253 | enable_compat20(); |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 254 | myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = |
| 255 | c->c_keytype == KT_DSA ? "ssh-dss" : |
| 256 | (c->c_keytype == KT_RSA ? "ssh-rsa" : |
| 257 | (c->c_keytype == KT_ED25519 ? "ssh-ed25519" : |
| 258 | "ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521")); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 259 | c->c_kex = kex_setup(myproposal); |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 260 | #ifdef WITH_OPENSSL |
Damien Miller | 8e7fb33 | 2003-02-24 12:03:03 +1100 | [diff] [blame] | 261 | c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; |
Damien Miller | f675fc4 | 2004-06-15 10:30:09 +1000 | [diff] [blame] | 262 | c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; |
Damien Miller | 8e7fb33 | 2003-02-24 12:03:03 +1100 | [diff] [blame] | 263 | c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; |
Damien Miller | a63128d | 2006-03-15 12:08:28 +1100 | [diff] [blame] | 264 | c->c_kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 265 | c->c_kex->kex[KEX_ECDH_SHA2] = kexecdh_client; |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 266 | #endif |
Damien Miller | 1e12426 | 2013-11-04 08:26:52 +1100 | [diff] [blame] | 267 | c->c_kex->kex[KEX_C25519_SHA256] = kexc25519_client; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 268 | c->c_kex->verify_host_key = hostjump; |
| 269 | |
| 270 | if (!(j = setjmp(kexjmp))) { |
| 271 | nonfatal_fatal = 1; |
| 272 | dispatch_run(DISPATCH_BLOCK, &c->c_kex->done, c->c_kex); |
| 273 | fprintf(stderr, "Impossible! dispatch_run() returned!\n"); |
| 274 | exit(1); |
| 275 | } |
| 276 | nonfatal_fatal = 0; |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 277 | free(c->c_kex); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 278 | c->c_kex = NULL; |
| 279 | packet_close(); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 280 | |
Ben Lindstrom | 520b55c | 2001-09-12 18:05:05 +0000 | [diff] [blame] | 281 | return j < 0? NULL : kexjmp_key; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | static void |
| 285 | keyprint(con *c, Key *key) |
| 286 | { |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 287 | char *host = c->c_output_name ? c->c_output_name : c->c_name; |
| 288 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 289 | if (!key) |
| 290 | return; |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 291 | if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL) |
| 292 | fatal("host_hash failed"); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 293 | |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 294 | fprintf(stdout, "%s ", host); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 295 | key_write(key, stdout); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 296 | fputs("\n", stdout); |
| 297 | } |
| 298 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 299 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 300 | tcpconnect(char *host) |
| 301 | { |
| 302 | struct addrinfo hints, *ai, *aitop; |
| 303 | char strport[NI_MAXSERV]; |
| 304 | int gaierr, s = -1; |
| 305 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 306 | snprintf(strport, sizeof strport, "%d", ssh_port); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 307 | memset(&hints, 0, sizeof(hints)); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 308 | hints.ai_family = IPv4or6; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 309 | hints.ai_socktype = SOCK_STREAM; |
| 310 | if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) |
Darren Tucker | 4abde77 | 2007-12-29 02:43:51 +1100 | [diff] [blame] | 311 | fatal("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 312 | for (ai = aitop; ai; ai = ai->ai_next) { |
Darren Tucker | 7bd98e7 | 2010-01-10 10:31:12 +1100 | [diff] [blame] | 313 | s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 314 | if (s < 0) { |
| 315 | error("socket: %s", strerror(errno)); |
| 316 | continue; |
| 317 | } |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 318 | if (set_nonblock(s) == -1) |
| 319 | fatal("%s: set_nonblock(%d)", __func__, s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 320 | if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 && |
| 321 | errno != EINPROGRESS) |
| 322 | error("connect (`%s'): %s", host, strerror(errno)); |
| 323 | else |
| 324 | break; |
| 325 | close(s); |
| 326 | s = -1; |
| 327 | } |
| 328 | freeaddrinfo(aitop); |
| 329 | return s; |
| 330 | } |
| 331 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 332 | static int |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 333 | conalloc(char *iname, char *oname, int keytype) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 334 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 335 | char *namebase, *name, *namelist; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 336 | int s; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 337 | |
| 338 | namebase = namelist = xstrdup(iname); |
| 339 | |
| 340 | do { |
| 341 | name = xstrsep(&namelist, ","); |
| 342 | if (!name) { |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 343 | free(namebase); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 344 | return (-1); |
| 345 | } |
| 346 | } while ((s = tcpconnect(name)) < 0); |
| 347 | |
| 348 | if (s >= maxfd) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 349 | fatal("conalloc: fdno %d too high", s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 350 | if (fdcon[s].c_status) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 351 | fatal("conalloc: attempt to reuse fdno %d", s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 352 | |
| 353 | fdcon[s].c_fd = s; |
| 354 | fdcon[s].c_status = CS_CON; |
| 355 | fdcon[s].c_namebase = namebase; |
| 356 | fdcon[s].c_name = name; |
| 357 | fdcon[s].c_namelist = namelist; |
| 358 | fdcon[s].c_output_name = xstrdup(oname); |
| 359 | fdcon[s].c_data = (char *) &fdcon[s].c_plen; |
| 360 | fdcon[s].c_len = 4; |
| 361 | fdcon[s].c_off = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 362 | fdcon[s].c_keytype = keytype; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 363 | gettimeofday(&fdcon[s].c_tv, NULL); |
| 364 | fdcon[s].c_tv.tv_sec += timeout; |
| 365 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 366 | FD_SET(s, read_wait); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 367 | ncon++; |
| 368 | return (s); |
| 369 | } |
| 370 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 371 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 372 | confree(int s) |
| 373 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 374 | if (s >= maxfd || fdcon[s].c_status == CS_UNUSED) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 375 | fatal("confree: attempt to free bad fdno %d", s); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 376 | close(s); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 377 | free(fdcon[s].c_namebase); |
| 378 | free(fdcon[s].c_output_name); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 379 | if (fdcon[s].c_status == CS_KEYS) |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 380 | free(fdcon[s].c_data); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 381 | fdcon[s].c_status = CS_UNUSED; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 382 | fdcon[s].c_keytype = 0; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 383 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 384 | FD_CLR(s, read_wait); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 385 | ncon--; |
| 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 | contouch(int s) |
| 390 | { |
| 391 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); |
| 392 | gettimeofday(&fdcon[s].c_tv, NULL); |
| 393 | fdcon[s].c_tv.tv_sec += timeout; |
| 394 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); |
| 395 | } |
| 396 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 397 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 398 | conrecycle(int s) |
| 399 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 400 | con *c = &fdcon[s]; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 401 | int ret; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 402 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 403 | ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 404 | confree(s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 405 | return (ret); |
| 406 | } |
| 407 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 408 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 409 | congreet(int s) |
| 410 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 411 | int n = 0, remote_major = 0, remote_minor = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 412 | char buf[256], *cp; |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 413 | char remote_version[sizeof buf]; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 414 | size_t bufsiz; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 415 | con *c = &fdcon[s]; |
| 416 | |
Damien Miller | 4bbacb7 | 2005-11-05 15:12:28 +1100 | [diff] [blame] | 417 | for (;;) { |
| 418 | memset(buf, '\0', sizeof(buf)); |
| 419 | bufsiz = sizeof(buf); |
| 420 | cp = buf; |
| 421 | while (bufsiz-- && |
| 422 | (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') { |
| 423 | if (*cp == '\r') |
| 424 | *cp = '\n'; |
| 425 | cp++; |
| 426 | } |
| 427 | if (n != 1 || strncmp(buf, "SSH-", 4) == 0) |
| 428 | break; |
Ben Lindstrom | de8fc6f | 2001-08-06 22:43:50 +0000 | [diff] [blame] | 429 | } |
Ben Lindstrom | 6b28c35 | 2002-03-05 01:54:52 +0000 | [diff] [blame] | 430 | if (n == 0) { |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 431 | switch (errno) { |
| 432 | case EPIPE: |
| 433 | error("%s: Connection closed by remote host", c->c_name); |
| 434 | break; |
| 435 | case ECONNREFUSED: |
| 436 | break; |
| 437 | default: |
| 438 | error("read (%s): %s", c->c_name, strerror(errno)); |
| 439 | break; |
| 440 | } |
Ben Lindstrom | 6b28c35 | 2002-03-05 01:54:52 +0000 | [diff] [blame] | 441 | conrecycle(s); |
| 442 | return; |
| 443 | } |
Ben Lindstrom | 884a4ac | 2001-03-06 03:33:04 +0000 | [diff] [blame] | 444 | if (*cp != '\n' && *cp != '\r') { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 445 | error("%s: bad greeting", c->c_name); |
| 446 | confree(s); |
| 447 | return; |
| 448 | } |
Ben Lindstrom | 884a4ac | 2001-03-06 03:33:04 +0000 | [diff] [blame] | 449 | *cp = '\0'; |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 450 | if (sscanf(buf, "SSH-%d.%d-%[^\n]\n", |
| 451 | &remote_major, &remote_minor, remote_version) == 3) |
| 452 | compat_datafellows(remote_version); |
| 453 | else |
| 454 | datafellows = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 455 | if (c->c_keytype != KT_RSA1) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 456 | if (!ssh2_capable(remote_major, remote_minor)) { |
| 457 | debug("%s doesn't support ssh2", c->c_name); |
| 458 | confree(s); |
| 459 | return; |
| 460 | } |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 461 | } else if (remote_major != 1) { |
| 462 | debug("%s doesn't support ssh1", c->c_name); |
| 463 | confree(s); |
| 464 | return; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 465 | } |
Ben Lindstrom | de8fc6f | 2001-08-06 22:43:50 +0000 | [diff] [blame] | 466 | fprintf(stderr, "# %s %s\n", c->c_name, chop(buf)); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 467 | n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n", |
| 468 | c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2, |
| 469 | c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2); |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 470 | if (n < 0 || (size_t)n >= sizeof(buf)) { |
Damien Miller | 41bfc29 | 2005-05-26 12:07:32 +1000 | [diff] [blame] | 471 | error("snprintf: buffer too small"); |
| 472 | confree(s); |
| 473 | return; |
| 474 | } |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 475 | if (atomicio(vwrite, s, buf, n) != (size_t)n) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 476 | error("write (%s): %s", c->c_name, strerror(errno)); |
| 477 | confree(s); |
| 478 | return; |
| 479 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 480 | if (c->c_keytype != KT_RSA1) { |
| 481 | keyprint(c, keygrab_ssh2(c)); |
| 482 | confree(s); |
| 483 | return; |
| 484 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 485 | c->c_status = CS_SIZE; |
| 486 | contouch(s); |
| 487 | } |
| 488 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 489 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 490 | conread(int s) |
| 491 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 492 | con *c = &fdcon[s]; |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 493 | size_t n; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 494 | |
| 495 | if (c->c_status == CS_CON) { |
| 496 | congreet(s); |
| 497 | return; |
| 498 | } |
Darren Tucker | fe6649d | 2004-08-13 21:19:37 +1000 | [diff] [blame] | 499 | 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] | 500 | if (n == 0) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 501 | error("read (%s): %s", c->c_name, strerror(errno)); |
| 502 | confree(s); |
| 503 | return; |
| 504 | } |
| 505 | c->c_off += n; |
| 506 | |
| 507 | if (c->c_off == c->c_len) |
| 508 | switch (c->c_status) { |
| 509 | case CS_SIZE: |
| 510 | c->c_plen = htonl(c->c_plen); |
| 511 | c->c_len = c->c_plen + 8 - (c->c_plen & 7); |
| 512 | c->c_off = 0; |
| 513 | c->c_data = xmalloc(c->c_len); |
| 514 | c->c_status = CS_KEYS; |
| 515 | break; |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 516 | #ifdef WITH_SSH1 |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 517 | case CS_KEYS: |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 518 | keyprint(c, keygrab_ssh1(c)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 519 | confree(s); |
| 520 | return; |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 521 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 522 | default: |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 523 | fatal("conread: invalid status %d", c->c_status); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 524 | break; |
| 525 | } |
| 526 | |
| 527 | contouch(s); |
| 528 | } |
| 529 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 530 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 531 | conloop(void) |
| 532 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 533 | struct timeval seltime, now; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 534 | fd_set *r, *e; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 535 | con *c; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 536 | int i; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 537 | |
| 538 | gettimeofday(&now, NULL); |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 539 | c = TAILQ_FIRST(&tq); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 540 | |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 541 | if (c && (c->c_tv.tv_sec > now.tv_sec || |
| 542 | (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] | 543 | seltime = c->c_tv; |
| 544 | seltime.tv_sec -= now.tv_sec; |
| 545 | seltime.tv_usec -= now.tv_usec; |
Ben Lindstrom | c791beb | 2001-02-10 23:18:11 +0000 | [diff] [blame] | 546 | if (seltime.tv_usec < 0) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 547 | seltime.tv_usec += 1000000; |
| 548 | seltime.tv_sec--; |
| 549 | } |
| 550 | } else |
Damien Miller | c5219e7 | 2011-05-05 14:05:12 +1000 | [diff] [blame] | 551 | timerclear(&seltime); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 552 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 553 | r = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
| 554 | e = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
| 555 | memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask)); |
| 556 | memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask)); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 557 | |
| 558 | while (select(maxfd, r, NULL, e, &seltime) == -1 && |
Damien Miller | d8968ad | 2008-07-04 23:10:49 +1000 | [diff] [blame] | 559 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 560 | ; |
| 561 | |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 562 | for (i = 0; i < maxfd; i++) { |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 563 | if (FD_ISSET(i, e)) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 564 | error("%s: exception!", fdcon[i].c_name); |
| 565 | confree(i); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 566 | } else if (FD_ISSET(i, r)) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 567 | conread(i); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 568 | } |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 569 | free(r); |
| 570 | free(e); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 571 | |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 572 | c = TAILQ_FIRST(&tq); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 573 | while (c && (c->c_tv.tv_sec < now.tv_sec || |
| 574 | (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] | 575 | int s = c->c_fd; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 576 | |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 577 | c = TAILQ_NEXT(c, c_link); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 578 | conrecycle(s); |
| 579 | } |
| 580 | } |
| 581 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 582 | static void |
| 583 | do_host(char *host) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 584 | { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 585 | char *name = strnnsep(&host, " \t\n"); |
| 586 | int j; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 587 | |
Ben Lindstrom | eaffb9d | 2001-12-06 16:28:19 +0000 | [diff] [blame] | 588 | if (name == NULL) |
| 589 | return; |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 590 | for (j = KT_RSA1; j <= KT_ED25519; j *= 2) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 591 | if (get_keytypes & j) { |
| 592 | while (ncon >= MAXCON) |
| 593 | conloop(); |
| 594 | conalloc(name, *host ? host : name, j); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 595 | } |
| 596 | } |
| 597 | } |
| 598 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 599 | void |
| 600 | fatal(const char *fmt,...) |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 601 | { |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 602 | va_list args; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 603 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 604 | va_start(args, fmt); |
| 605 | do_log(SYSLOG_LEVEL_FATAL, fmt, args); |
| 606 | va_end(args); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 607 | if (nonfatal_fatal) |
| 608 | longjmp(kexjmp, -1); |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 609 | else |
Darren Tucker | 3d32622 | 2003-09-22 21:11:20 +1000 | [diff] [blame] | 610 | exit(255); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 614 | usage(void) |
| 615 | { |
Damien Miller | c1719f7 | 2008-11-03 19:27:07 +1100 | [diff] [blame] | 616 | fprintf(stderr, |
| 617 | "usage: %s [-46Hv] [-f file] [-p port] [-T timeout] [-t type]\n" |
Darren Tucker | 7bd98e7 | 2010-01-10 10:31:12 +1100 | [diff] [blame] | 618 | "\t\t [host | addrlist namelist] ...\n", |
Ben Lindstrom | ddfb1e3 | 2001-08-06 22:06:35 +0000 | [diff] [blame] | 619 | __progname); |
Ben Lindstrom | ddfb1e3 | 2001-08-06 22:06:35 +0000 | [diff] [blame] | 620 | exit(1); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | int |
| 624 | main(int argc, char **argv) |
| 625 | { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 626 | int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO; |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 627 | int opt, fopt_count = 0, j; |
| 628 | char *tname, *cp, line[NI_MAXHOST]; |
| 629 | FILE *fp; |
| 630 | u_long linenum; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 631 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 632 | extern int optind; |
| 633 | extern char *optarg; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 634 | |
Damien Miller | 59d3d5b | 2003-08-22 09:34:41 +1000 | [diff] [blame] | 635 | __progname = ssh_get_progname(argv[0]); |
Ben Lindstrom | 4e088e4 | 2001-10-10 20:45:43 +0000 | [diff] [blame] | 636 | seed_rng(); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 637 | TAILQ_INIT(&tq); |
| 638 | |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 639 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
| 640 | sanitise_stdfd(); |
| 641 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 642 | if (argc <= 1) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 643 | usage(); |
| 644 | |
Darren Tucker | 7bd98e7 | 2010-01-10 10:31:12 +1100 | [diff] [blame] | 645 | while ((opt = getopt(argc, argv, "Hv46p:T:t:f:")) != -1) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 646 | switch (opt) { |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 647 | case 'H': |
| 648 | hash_hosts = 1; |
| 649 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 650 | case 'p': |
| 651 | ssh_port = a2port(optarg); |
Damien Miller | 3dc71ad | 2009-01-28 16:31:22 +1100 | [diff] [blame] | 652 | if (ssh_port <= 0) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 653 | fprintf(stderr, "Bad port '%s'\n", optarg); |
| 654 | exit(1); |
| 655 | } |
| 656 | break; |
| 657 | case 'T': |
Ben Lindstrom | edd098b | 2002-07-04 00:07:13 +0000 | [diff] [blame] | 658 | timeout = convtime(optarg); |
| 659 | if (timeout == -1 || timeout == 0) { |
| 660 | fprintf(stderr, "Bad timeout '%s'\n", optarg); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 661 | usage(); |
Ben Lindstrom | edd098b | 2002-07-04 00:07:13 +0000 | [diff] [blame] | 662 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 663 | break; |
| 664 | case 'v': |
| 665 | if (!debug_flag) { |
| 666 | debug_flag = 1; |
| 667 | log_level = SYSLOG_LEVEL_DEBUG1; |
| 668 | } |
| 669 | else if (log_level < SYSLOG_LEVEL_DEBUG3) |
| 670 | log_level++; |
| 671 | else |
| 672 | fatal("Too high debugging level."); |
| 673 | break; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 674 | case 'f': |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 675 | if (strcmp(optarg, "-") == 0) |
| 676 | optarg = NULL; |
| 677 | argv[fopt_count++] = optarg; |
| 678 | break; |
| 679 | case 't': |
| 680 | get_keytypes = 0; |
| 681 | tname = strtok(optarg, ","); |
| 682 | while (tname) { |
| 683 | int type = key_type_from_name(tname); |
| 684 | switch (type) { |
| 685 | case KEY_RSA1: |
| 686 | get_keytypes |= KT_RSA1; |
| 687 | break; |
| 688 | case KEY_DSA: |
| 689 | get_keytypes |= KT_DSA; |
| 690 | break; |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 691 | case KEY_ECDSA: |
| 692 | get_keytypes |= KT_ECDSA; |
| 693 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 694 | case KEY_RSA: |
| 695 | get_keytypes |= KT_RSA; |
| 696 | break; |
Damien Miller | 5be9d9e | 2013-12-07 11:24:01 +1100 | [diff] [blame] | 697 | case KEY_ED25519: |
| 698 | get_keytypes |= KT_ED25519; |
| 699 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 700 | case KEY_UNSPEC: |
Ben Lindstrom | 28c603b | 2001-12-06 16:45:10 +0000 | [diff] [blame] | 701 | fatal("unknown key type %s", tname); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 702 | } |
| 703 | tname = strtok(NULL, ","); |
| 704 | } |
| 705 | break; |
| 706 | case '4': |
| 707 | IPv4or6 = AF_INET; |
| 708 | break; |
| 709 | case '6': |
| 710 | IPv4or6 = AF_INET6; |
| 711 | break; |
| 712 | case '?': |
| 713 | default: |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 714 | usage(); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 715 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 716 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 717 | if (optind == argc && !fopt_count) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 718 | usage(); |
| 719 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 720 | log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 721 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 722 | maxfd = fdlim_get(1); |
| 723 | if (maxfd < 0) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 724 | fatal("%s: fdlim_get: bad value", __progname); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 725 | if (maxfd > MAXMAXFD) |
| 726 | maxfd = MAXMAXFD; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 727 | if (MAXCON <= 0) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 728 | fatal("%s: not enough file descriptors", __progname); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 729 | if (maxfd > fdlim_get(0)) |
| 730 | fdlim_set(maxfd); |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 731 | fdcon = xcalloc(maxfd, sizeof(con)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 732 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 733 | read_wait_nfdset = howmany(maxfd, NFDBITS); |
| 734 | read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 735 | |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 736 | for (j = 0; j < fopt_count; j++) { |
| 737 | if (argv[j] == NULL) |
| 738 | fp = stdin; |
| 739 | else if ((fp = fopen(argv[j], "r")) == NULL) |
| 740 | fatal("%s: %s: %s", __progname, argv[j], |
| 741 | strerror(errno)); |
| 742 | linenum = 0; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 743 | |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 744 | while (read_keyfile_line(fp, |
| 745 | argv[j] == NULL ? "(stdin)" : argv[j], line, sizeof(line), |
| 746 | &linenum) != -1) { |
| 747 | /* Chomp off trailing whitespace and comments */ |
| 748 | if ((cp = strchr(line, '#')) == NULL) |
| 749 | cp = line + strlen(line) - 1; |
| 750 | while (cp >= line) { |
| 751 | if (*cp == ' ' || *cp == '\t' || |
| 752 | *cp == '\n' || *cp == '#') |
| 753 | *cp-- = '\0'; |
| 754 | else |
| 755 | break; |
| 756 | } |
| 757 | |
| 758 | /* Skip empty lines */ |
| 759 | if (*line == '\0') |
Ben Lindstrom | 78bbd9e | 2001-09-12 17:10:40 +0000 | [diff] [blame] | 760 | continue; |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 761 | |
| 762 | do_host(line); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 763 | } |
Damien Miller | 0e76c5e | 2010-06-26 09:39:59 +1000 | [diff] [blame] | 764 | |
| 765 | if (ferror(fp)) |
| 766 | fatal("%s: %s: %s", __progname, argv[j], |
| 767 | strerror(errno)); |
| 768 | |
| 769 | fclose(fp); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 770 | } |
| 771 | |
| 772 | while (optind < argc) |
| 773 | do_host(argv[optind++]); |
| 774 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 775 | while (ncon > 0) |
| 776 | conloop(); |
| 777 | |
| 778 | return (0); |
| 779 | } |