Darren Tucker | 75456e8 | 2010-01-08 18:55:58 +1100 | [diff] [blame] | 1 | /* $OpenBSD: ssh-keyscan.c,v 1.80 2009/12/25 19:40:21 stevesk 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 | |
Damien Miller | 9b48151 | 2002-09-12 10:43:29 +1000 | [diff] [blame] | 12 | #include "openbsd-compat/sys-queue.h" |
Damien Miller | cd4223c | 2006-03-15 11:22:47 +1100 | [diff] [blame] | 13 | #include <sys/resource.h> |
Damien Miller | 9aec919 | 2006-08-05 10:57:45 +1000 | [diff] [blame] | 14 | #ifdef HAVE_SYS_TIME_H |
| 15 | # include <sys/time.h> |
| 16 | #endif |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 17 | |
Darren Tucker | 46aa3e0 | 2006-09-02 15:32:40 +1000 | [diff] [blame] | 18 | #include <netinet/in.h> |
| 19 | #include <arpa/inet.h> |
| 20 | |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 21 | #include <openssl/bn.h> |
| 22 | |
Damien Miller | b8fe89c | 2006-07-24 14:51:00 +1000 | [diff] [blame] | 23 | #include <netdb.h> |
Darren Tucker | deecec9 | 2006-07-12 22:44:34 +1000 | [diff] [blame] | 24 | #include <errno.h> |
Damien Miller | be43ebf | 2006-07-24 13:51:51 +1000 | [diff] [blame] | 25 | #include <setjmp.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" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 35 | #include "ssh1.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 36 | #include "buffer.h" |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 37 | #include "key.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 38 | #include "cipher.h" |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 39 | #include "kex.h" |
| 40 | #include "compat.h" |
| 41 | #include "myproposal.h" |
| 42 | #include "packet.h" |
| 43 | #include "dispatch.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 44 | #include "log.h" |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 45 | #include "atomicio.h" |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 46 | #include "misc.h" |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 47 | #include "hostfile.h" |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 48 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 49 | /* Flag indicating whether IPv4 or IPv6. This can be set on the command line. |
| 50 | Default value is AF_UNSPEC means both IPv4 and IPv6. */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 51 | int IPv4or6 = AF_UNSPEC; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 52 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 53 | int ssh_port = SSH_DEFAULT_PORT; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 54 | |
| 55 | #define KT_RSA1 1 |
| 56 | #define KT_DSA 2 |
| 57 | #define KT_RSA 4 |
| 58 | |
Damien Miller | bacb7fb | 2008-05-19 14:56:33 +1000 | [diff] [blame] | 59 | int get_keytypes = KT_RSA; /* Get only RSA keys by default */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 60 | |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 61 | int hash_hosts = 0; /* Hash hostname on output */ |
| 62 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 63 | #define MAXMAXFD 256 |
| 64 | |
| 65 | /* The number of seconds after which to give up on a TCP connection */ |
| 66 | int timeout = 5; |
| 67 | |
| 68 | int maxfd; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 69 | #define MAXCON (maxfd - 10) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 70 | |
Darren Tucker | 34e314d | 2010-01-08 17:03:46 +1100 | [diff] [blame] | 71 | /* The default routing domain */ |
| 72 | int scan_rdomain = -1; |
| 73 | |
Kevin Steves | ec84dc1 | 2000-12-13 17:45:15 +0000 | [diff] [blame] | 74 | extern char *__progname; |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 75 | fd_set *read_wait; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 76 | size_t read_wait_nfdset; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 77 | int ncon; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 78 | int nonfatal_fatal = 0; |
| 79 | jmp_buf kexjmp; |
Ben Lindstrom | 520b55c | 2001-09-12 18:05:05 +0000 | [diff] [blame] | 80 | Key *kexjmp_key; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 81 | |
| 82 | /* |
| 83 | * Keep a connection structure for each file descriptor. The state |
| 84 | * associated with file descriptor n is held in fdcon[n]. |
| 85 | */ |
| 86 | typedef struct Connection { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 87 | u_char c_status; /* State of connection on this file desc. */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 88 | #define CS_UNUSED 0 /* File descriptor unused */ |
| 89 | #define CS_CON 1 /* Waiting to connect/read greeting */ |
| 90 | #define CS_SIZE 2 /* Waiting to read initial packet size */ |
| 91 | #define CS_KEYS 3 /* Waiting to read public key packet */ |
| 92 | int c_fd; /* Quick lookup: c->c_fd == c - fdcon */ |
| 93 | int c_plen; /* Packet length field for ssh packet */ |
| 94 | int c_len; /* Total bytes which must be read. */ |
| 95 | int c_off; /* Length of data read so far. */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 96 | 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] | 97 | char *c_namebase; /* Address to free for c_name and c_namelist */ |
| 98 | char *c_name; /* Hostname of connection for errors */ |
| 99 | char *c_namelist; /* Pointer to other possible addresses */ |
| 100 | char *c_output_name; /* Hostname of connection for output */ |
| 101 | char *c_data; /* Data read from this fd */ |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 102 | Kex *c_kex; /* The key-exchange struct for ssh2 */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 103 | struct timeval c_tv; /* Time at which connection gets aborted */ |
| 104 | TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */ |
| 105 | } con; |
| 106 | |
| 107 | TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */ |
| 108 | con *fdcon; |
| 109 | |
| 110 | /* |
| 111 | * This is just a wrapper around fgets() to make it usable. |
| 112 | */ |
| 113 | |
| 114 | /* Stress-test. Increase this later. */ |
| 115 | #define LINEBUF_SIZE 16 |
| 116 | |
| 117 | typedef struct { |
| 118 | char *buf; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 119 | u_int size; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 120 | int lineno; |
| 121 | const char *filename; |
| 122 | FILE *stream; |
| 123 | void (*errfun) (const char *,...); |
| 124 | } Linebuf; |
| 125 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 126 | static Linebuf * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 127 | Linebuf_alloc(const char *filename, void (*errfun) (const char *,...)) |
| 128 | { |
| 129 | Linebuf *lb; |
| 130 | |
| 131 | if (!(lb = malloc(sizeof(*lb)))) { |
| 132 | if (errfun) |
Ben Lindstrom | 04f9af7 | 2002-07-04 00:03:56 +0000 | [diff] [blame] | 133 | (*errfun) ("linebuf (%s): malloc failed\n", |
| 134 | filename ? filename : "(stdin)"); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 135 | return (NULL); |
| 136 | } |
| 137 | if (filename) { |
| 138 | lb->filename = filename; |
| 139 | if (!(lb->stream = fopen(filename, "r"))) { |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 140 | xfree(lb); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 141 | if (errfun) |
| 142 | (*errfun) ("%s: %s\n", filename, strerror(errno)); |
| 143 | return (NULL); |
| 144 | } |
| 145 | } else { |
| 146 | lb->filename = "(stdin)"; |
| 147 | lb->stream = stdin; |
| 148 | } |
| 149 | |
Damien Miller | 3bbaba6 | 2006-03-26 13:59:38 +1100 | [diff] [blame] | 150 | if (!(lb->buf = malloc((lb->size = LINEBUF_SIZE)))) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 151 | if (errfun) |
| 152 | (*errfun) ("linebuf (%s): malloc failed\n", lb->filename); |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 153 | xfree(lb); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 154 | return (NULL); |
| 155 | } |
| 156 | lb->errfun = errfun; |
| 157 | lb->lineno = 0; |
| 158 | return (lb); |
| 159 | } |
| 160 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 161 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 162 | Linebuf_free(Linebuf * lb) |
| 163 | { |
| 164 | fclose(lb->stream); |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 165 | xfree(lb->buf); |
| 166 | xfree(lb); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 167 | } |
| 168 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 169 | #if 0 |
| 170 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 171 | Linebuf_restart(Linebuf * lb) |
| 172 | { |
| 173 | clearerr(lb->stream); |
| 174 | rewind(lb->stream); |
| 175 | lb->lineno = 0; |
| 176 | } |
| 177 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 178 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 179 | Linebuf_lineno(Linebuf * lb) |
| 180 | { |
| 181 | return (lb->lineno); |
| 182 | } |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 183 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 184 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 185 | static char * |
Ben Lindstrom | c791beb | 2001-02-10 23:18:11 +0000 | [diff] [blame] | 186 | Linebuf_getline(Linebuf * lb) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 187 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 188 | size_t n = 0; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 189 | void *p; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 190 | |
| 191 | lb->lineno++; |
| 192 | for (;;) { |
| 193 | /* Read a line */ |
| 194 | if (!fgets(&lb->buf[n], lb->size - n, lb->stream)) { |
| 195 | if (ferror(lb->stream) && lb->errfun) |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 196 | (*lb->errfun)("%s: %s\n", lb->filename, |
Ben Lindstrom | b0a4cd8 | 2001-03-05 04:54:49 +0000 | [diff] [blame] | 197 | strerror(errno)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 198 | return (NULL); |
| 199 | } |
| 200 | n = strlen(lb->buf); |
| 201 | |
| 202 | /* Return it or an error if it fits */ |
| 203 | if (n > 0 && lb->buf[n - 1] == '\n') { |
| 204 | lb->buf[n - 1] = '\0'; |
| 205 | return (lb->buf); |
| 206 | } |
| 207 | if (n != lb->size - 1) { |
| 208 | if (lb->errfun) |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 209 | (*lb->errfun)("%s: skipping incomplete last line\n", |
Ben Lindstrom | b0a4cd8 | 2001-03-05 04:54:49 +0000 | [diff] [blame] | 210 | lb->filename); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 211 | return (NULL); |
| 212 | } |
| 213 | /* Double the buffer if we need more space */ |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 214 | lb->size *= 2; |
| 215 | if ((p = realloc(lb->buf, lb->size)) == NULL) { |
| 216 | lb->size /= 2; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 217 | if (lb->errfun) |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 218 | (*lb->errfun)("linebuf (%s): realloc failed\n", |
Ben Lindstrom | b0a4cd8 | 2001-03-05 04:54:49 +0000 | [diff] [blame] | 219 | lb->filename); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 220 | return (NULL); |
| 221 | } |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 222 | lb->buf = p; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 223 | } |
| 224 | } |
| 225 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 226 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 227 | fdlim_get(int hard) |
| 228 | { |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 229 | #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 230 | struct rlimit rlfd; |
Ben Lindstrom | b0a4cd8 | 2001-03-05 04:54:49 +0000 | [diff] [blame] | 231 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 232 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 233 | return (-1); |
| 234 | if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY) |
Damien Miller | e00074a | 2003-11-24 13:07:45 +1100 | [diff] [blame] | 235 | return SSH_SYSFDMAX; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 236 | else |
| 237 | return hard ? rlfd.rlim_max : rlfd.rlim_cur; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 238 | #else |
Damien Miller | e00074a | 2003-11-24 13:07:45 +1100 | [diff] [blame] | 239 | return SSH_SYSFDMAX; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 240 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 241 | } |
| 242 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 243 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 244 | fdlim_set(int lim) |
| 245 | { |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 246 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 247 | struct rlimit rlfd; |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 248 | #endif |
Ben Lindstrom | 5c98db5 | 2002-07-07 22:25:29 +0000 | [diff] [blame] | 249 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 250 | if (lim <= 0) |
| 251 | return (-1); |
Ben Lindstrom | 5adbad2 | 2000-12-27 07:06:21 +0000 | [diff] [blame] | 252 | #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 253 | if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 254 | return (-1); |
| 255 | rlfd.rlim_cur = lim; |
| 256 | if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0) |
| 257 | return (-1); |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 258 | #elif defined (HAVE_SETDTABLESIZE) |
Kevin Steves | 28a7f26 | 2001-02-05 15:43:59 +0000 | [diff] [blame] | 259 | setdtablesize(lim); |
Ben Lindstrom | 2c467a2 | 2000-12-27 04:57:41 +0000 | [diff] [blame] | 260 | #endif |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 261 | return (0); |
| 262 | } |
| 263 | |
| 264 | /* |
| 265 | * This is an strsep function that returns a null field for adjacent |
| 266 | * separators. This is the same as the 4.4BSD strsep, but different from the |
| 267 | * one in the GNU libc. |
| 268 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 269 | static char * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 270 | xstrsep(char **str, const char *delim) |
| 271 | { |
| 272 | char *s, *e; |
| 273 | |
| 274 | if (!**str) |
| 275 | return (NULL); |
| 276 | |
| 277 | s = *str; |
| 278 | e = s + strcspn(s, delim); |
| 279 | |
| 280 | if (*e != '\0') |
| 281 | *e++ = '\0'; |
| 282 | *str = e; |
| 283 | |
| 284 | return (s); |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Get the next non-null token (like GNU strsep). Strsep() will return a |
| 289 | * null token for two adjacent separators, so we may have to loop. |
| 290 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 291 | static char * |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 292 | strnnsep(char **stringp, char *delim) |
| 293 | { |
| 294 | char *tok; |
| 295 | |
| 296 | do { |
| 297 | tok = xstrsep(stringp, delim); |
| 298 | } while (tok && *tok == '\0'); |
| 299 | return (tok); |
| 300 | } |
| 301 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 302 | static Key * |
| 303 | keygrab_ssh1(con *c) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 304 | { |
| 305 | static Key *rsa; |
| 306 | static Buffer msg; |
| 307 | |
| 308 | if (rsa == NULL) { |
| 309 | buffer_init(&msg); |
| 310 | rsa = key_new(KEY_RSA1); |
| 311 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 312 | buffer_append(&msg, c->c_data, c->c_plen); |
| 313 | buffer_consume(&msg, 8 - (c->c_plen & 7)); /* padding */ |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 314 | if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 315 | error("%s: invalid packet type", c->c_name); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 316 | buffer_clear(&msg); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 317 | return NULL; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 318 | } |
| 319 | buffer_consume(&msg, 8); /* cookie */ |
| 320 | |
| 321 | /* server key */ |
| 322 | (void) buffer_get_int(&msg); |
| 323 | buffer_get_bignum(&msg, rsa->rsa->e); |
| 324 | buffer_get_bignum(&msg, rsa->rsa->n); |
| 325 | |
| 326 | /* host key */ |
| 327 | (void) buffer_get_int(&msg); |
| 328 | buffer_get_bignum(&msg, rsa->rsa->e); |
| 329 | buffer_get_bignum(&msg, rsa->rsa->n); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 330 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 331 | buffer_clear(&msg); |
| 332 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 333 | return (rsa); |
| 334 | } |
| 335 | |
| 336 | static int |
| 337 | hostjump(Key *hostkey) |
| 338 | { |
Ben Lindstrom | 520b55c | 2001-09-12 18:05:05 +0000 | [diff] [blame] | 339 | kexjmp_key = hostkey; |
| 340 | longjmp(kexjmp, 1); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | static int |
| 344 | ssh2_capable(int remote_major, int remote_minor) |
| 345 | { |
| 346 | switch (remote_major) { |
| 347 | case 1: |
| 348 | if (remote_minor == 99) |
| 349 | return 1; |
| 350 | break; |
| 351 | case 2: |
| 352 | return 1; |
| 353 | default: |
| 354 | break; |
| 355 | } |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | static Key * |
| 360 | keygrab_ssh2(con *c) |
| 361 | { |
| 362 | int j; |
| 363 | |
| 364 | packet_set_connection(c->c_fd, c->c_fd); |
| 365 | enable_compat20(); |
| 366 | myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = c->c_keytype == KT_DSA? |
| 367 | "ssh-dss": "ssh-rsa"; |
| 368 | c->c_kex = kex_setup(myproposal); |
Damien Miller | 8e7fb33 | 2003-02-24 12:03:03 +1100 | [diff] [blame] | 369 | c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; |
Damien Miller | f675fc4 | 2004-06-15 10:30:09 +1000 | [diff] [blame] | 370 | c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; |
Damien Miller | 8e7fb33 | 2003-02-24 12:03:03 +1100 | [diff] [blame] | 371 | c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; |
Damien Miller | a63128d | 2006-03-15 12:08:28 +1100 | [diff] [blame] | 372 | c->c_kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 373 | c->c_kex->verify_host_key = hostjump; |
| 374 | |
| 375 | if (!(j = setjmp(kexjmp))) { |
| 376 | nonfatal_fatal = 1; |
| 377 | dispatch_run(DISPATCH_BLOCK, &c->c_kex->done, c->c_kex); |
| 378 | fprintf(stderr, "Impossible! dispatch_run() returned!\n"); |
| 379 | exit(1); |
| 380 | } |
| 381 | nonfatal_fatal = 0; |
| 382 | xfree(c->c_kex); |
| 383 | c->c_kex = NULL; |
| 384 | packet_close(); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 385 | |
Ben Lindstrom | 520b55c | 2001-09-12 18:05:05 +0000 | [diff] [blame] | 386 | return j < 0? NULL : kexjmp_key; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | static void |
| 390 | keyprint(con *c, Key *key) |
| 391 | { |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 392 | char *host = c->c_output_name ? c->c_output_name : c->c_name; |
| 393 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 394 | if (!key) |
| 395 | return; |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 396 | if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL) |
| 397 | fatal("host_hash failed"); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 398 | |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 399 | fprintf(stdout, "%s ", host); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 400 | key_write(key, stdout); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 401 | fputs("\n", stdout); |
| 402 | } |
| 403 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 404 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 405 | tcpconnect(char *host) |
| 406 | { |
| 407 | struct addrinfo hints, *ai, *aitop; |
| 408 | char strport[NI_MAXSERV]; |
| 409 | int gaierr, s = -1; |
| 410 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 411 | snprintf(strport, sizeof strport, "%d", ssh_port); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 412 | memset(&hints, 0, sizeof(hints)); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 413 | hints.ai_family = IPv4or6; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 414 | hints.ai_socktype = SOCK_STREAM; |
| 415 | if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) |
Darren Tucker | 4abde77 | 2007-12-29 02:43:51 +1100 | [diff] [blame] | 416 | fatal("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 417 | for (ai = aitop; ai; ai = ai->ai_next) { |
Darren Tucker | 34e314d | 2010-01-08 17:03:46 +1100 | [diff] [blame] | 418 | s = socket_rdomain(ai->ai_family, ai->ai_socktype, |
| 419 | ai->ai_protocol, scan_rdomain); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 420 | if (s < 0) { |
| 421 | error("socket: %s", strerror(errno)); |
| 422 | continue; |
| 423 | } |
Damien Miller | 232711f | 2004-06-15 10:35:30 +1000 | [diff] [blame] | 424 | if (set_nonblock(s) == -1) |
| 425 | fatal("%s: set_nonblock(%d)", __func__, s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 426 | if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 && |
| 427 | errno != EINPROGRESS) |
| 428 | error("connect (`%s'): %s", host, strerror(errno)); |
| 429 | else |
| 430 | break; |
| 431 | close(s); |
| 432 | s = -1; |
| 433 | } |
| 434 | freeaddrinfo(aitop); |
| 435 | return s; |
| 436 | } |
| 437 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 438 | static int |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 439 | conalloc(char *iname, char *oname, int keytype) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 440 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 441 | char *namebase, *name, *namelist; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 442 | int s; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 443 | |
| 444 | namebase = namelist = xstrdup(iname); |
| 445 | |
| 446 | do { |
| 447 | name = xstrsep(&namelist, ","); |
| 448 | if (!name) { |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 449 | xfree(namebase); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 450 | return (-1); |
| 451 | } |
| 452 | } while ((s = tcpconnect(name)) < 0); |
| 453 | |
| 454 | if (s >= maxfd) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 455 | fatal("conalloc: fdno %d too high", s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 456 | if (fdcon[s].c_status) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 457 | fatal("conalloc: attempt to reuse fdno %d", s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 458 | |
| 459 | fdcon[s].c_fd = s; |
| 460 | fdcon[s].c_status = CS_CON; |
| 461 | fdcon[s].c_namebase = namebase; |
| 462 | fdcon[s].c_name = name; |
| 463 | fdcon[s].c_namelist = namelist; |
| 464 | fdcon[s].c_output_name = xstrdup(oname); |
| 465 | fdcon[s].c_data = (char *) &fdcon[s].c_plen; |
| 466 | fdcon[s].c_len = 4; |
| 467 | fdcon[s].c_off = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 468 | fdcon[s].c_keytype = keytype; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 469 | gettimeofday(&fdcon[s].c_tv, NULL); |
| 470 | fdcon[s].c_tv.tv_sec += timeout; |
| 471 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 472 | FD_SET(s, read_wait); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 473 | ncon++; |
| 474 | return (s); |
| 475 | } |
| 476 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 477 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 478 | confree(int s) |
| 479 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 480 | if (s >= maxfd || fdcon[s].c_status == CS_UNUSED) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 481 | fatal("confree: attempt to free bad fdno %d", s); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 482 | close(s); |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 483 | xfree(fdcon[s].c_namebase); |
| 484 | xfree(fdcon[s].c_output_name); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 485 | if (fdcon[s].c_status == CS_KEYS) |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 486 | xfree(fdcon[s].c_data); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 487 | fdcon[s].c_status = CS_UNUSED; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 488 | fdcon[s].c_keytype = 0; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 489 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 490 | FD_CLR(s, read_wait); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 491 | ncon--; |
| 492 | } |
| 493 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 494 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 495 | contouch(int s) |
| 496 | { |
| 497 | TAILQ_REMOVE(&tq, &fdcon[s], c_link); |
| 498 | gettimeofday(&fdcon[s].c_tv, NULL); |
| 499 | fdcon[s].c_tv.tv_sec += timeout; |
| 500 | TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link); |
| 501 | } |
| 502 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 503 | static int |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 504 | conrecycle(int s) |
| 505 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 506 | con *c = &fdcon[s]; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 507 | int ret; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 508 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 509 | ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 510 | confree(s); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 511 | return (ret); |
| 512 | } |
| 513 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 514 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 515 | congreet(int s) |
| 516 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 517 | int n = 0, remote_major = 0, remote_minor = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 518 | char buf[256], *cp; |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 519 | char remote_version[sizeof buf]; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 520 | size_t bufsiz; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 521 | con *c = &fdcon[s]; |
| 522 | |
Damien Miller | 4bbacb7 | 2005-11-05 15:12:28 +1100 | [diff] [blame] | 523 | for (;;) { |
| 524 | memset(buf, '\0', sizeof(buf)); |
| 525 | bufsiz = sizeof(buf); |
| 526 | cp = buf; |
| 527 | while (bufsiz-- && |
| 528 | (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') { |
| 529 | if (*cp == '\r') |
| 530 | *cp = '\n'; |
| 531 | cp++; |
| 532 | } |
| 533 | if (n != 1 || strncmp(buf, "SSH-", 4) == 0) |
| 534 | break; |
Ben Lindstrom | de8fc6f | 2001-08-06 22:43:50 +0000 | [diff] [blame] | 535 | } |
Ben Lindstrom | 6b28c35 | 2002-03-05 01:54:52 +0000 | [diff] [blame] | 536 | if (n == 0) { |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 537 | switch (errno) { |
| 538 | case EPIPE: |
| 539 | error("%s: Connection closed by remote host", c->c_name); |
| 540 | break; |
| 541 | case ECONNREFUSED: |
| 542 | break; |
| 543 | default: |
| 544 | error("read (%s): %s", c->c_name, strerror(errno)); |
| 545 | break; |
| 546 | } |
Ben Lindstrom | 6b28c35 | 2002-03-05 01:54:52 +0000 | [diff] [blame] | 547 | conrecycle(s); |
| 548 | return; |
| 549 | } |
Ben Lindstrom | 884a4ac | 2001-03-06 03:33:04 +0000 | [diff] [blame] | 550 | if (*cp != '\n' && *cp != '\r') { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 551 | error("%s: bad greeting", c->c_name); |
| 552 | confree(s); |
| 553 | return; |
| 554 | } |
Ben Lindstrom | 884a4ac | 2001-03-06 03:33:04 +0000 | [diff] [blame] | 555 | *cp = '\0'; |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 556 | if (sscanf(buf, "SSH-%d.%d-%[^\n]\n", |
| 557 | &remote_major, &remote_minor, remote_version) == 3) |
| 558 | compat_datafellows(remote_version); |
| 559 | else |
| 560 | datafellows = 0; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 561 | if (c->c_keytype != KT_RSA1) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 562 | if (!ssh2_capable(remote_major, remote_minor)) { |
| 563 | debug("%s doesn't support ssh2", c->c_name); |
| 564 | confree(s); |
| 565 | return; |
| 566 | } |
Damien Miller | 83c02ef | 2001-12-21 12:45:43 +1100 | [diff] [blame] | 567 | } else if (remote_major != 1) { |
| 568 | debug("%s doesn't support ssh1", c->c_name); |
| 569 | confree(s); |
| 570 | return; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 571 | } |
Ben Lindstrom | de8fc6f | 2001-08-06 22:43:50 +0000 | [diff] [blame] | 572 | fprintf(stderr, "# %s %s\n", c->c_name, chop(buf)); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 573 | n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n", |
| 574 | c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2, |
| 575 | c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2); |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 576 | if (n < 0 || (size_t)n >= sizeof(buf)) { |
Damien Miller | 41bfc29 | 2005-05-26 12:07:32 +1000 | [diff] [blame] | 577 | error("snprintf: buffer too small"); |
| 578 | confree(s); |
| 579 | return; |
| 580 | } |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 581 | if (atomicio(vwrite, s, buf, n) != (size_t)n) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 582 | error("write (%s): %s", c->c_name, strerror(errno)); |
| 583 | confree(s); |
| 584 | return; |
| 585 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 586 | if (c->c_keytype != KT_RSA1) { |
| 587 | keyprint(c, keygrab_ssh2(c)); |
| 588 | confree(s); |
| 589 | return; |
| 590 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 591 | c->c_status = CS_SIZE; |
| 592 | contouch(s); |
| 593 | } |
| 594 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 595 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 596 | conread(int s) |
| 597 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 598 | con *c = &fdcon[s]; |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 599 | size_t n; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 600 | |
| 601 | if (c->c_status == CS_CON) { |
| 602 | congreet(s); |
| 603 | return; |
| 604 | } |
Darren Tucker | fe6649d | 2004-08-13 21:19:37 +1000 | [diff] [blame] | 605 | 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] | 606 | if (n == 0) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 607 | error("read (%s): %s", c->c_name, strerror(errno)); |
| 608 | confree(s); |
| 609 | return; |
| 610 | } |
| 611 | c->c_off += n; |
| 612 | |
| 613 | if (c->c_off == c->c_len) |
| 614 | switch (c->c_status) { |
| 615 | case CS_SIZE: |
| 616 | c->c_plen = htonl(c->c_plen); |
| 617 | c->c_len = c->c_plen + 8 - (c->c_plen & 7); |
| 618 | c->c_off = 0; |
| 619 | c->c_data = xmalloc(c->c_len); |
| 620 | c->c_status = CS_KEYS; |
| 621 | break; |
| 622 | case CS_KEYS: |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 623 | keyprint(c, keygrab_ssh1(c)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 624 | confree(s); |
| 625 | return; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 626 | default: |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 627 | fatal("conread: invalid status %d", c->c_status); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 628 | break; |
| 629 | } |
| 630 | |
| 631 | contouch(s); |
| 632 | } |
| 633 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 634 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 635 | conloop(void) |
| 636 | { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 637 | struct timeval seltime, now; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 638 | fd_set *r, *e; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 639 | con *c; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 640 | int i; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 641 | |
| 642 | gettimeofday(&now, NULL); |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 643 | c = TAILQ_FIRST(&tq); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 644 | |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 645 | if (c && (c->c_tv.tv_sec > now.tv_sec || |
| 646 | (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] | 647 | seltime = c->c_tv; |
| 648 | seltime.tv_sec -= now.tv_sec; |
| 649 | seltime.tv_usec -= now.tv_usec; |
Ben Lindstrom | c791beb | 2001-02-10 23:18:11 +0000 | [diff] [blame] | 650 | if (seltime.tv_usec < 0) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 651 | seltime.tv_usec += 1000000; |
| 652 | seltime.tv_sec--; |
| 653 | } |
| 654 | } else |
| 655 | seltime.tv_sec = seltime.tv_usec = 0; |
| 656 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 657 | r = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
| 658 | e = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
| 659 | memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask)); |
| 660 | memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask)); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 661 | |
| 662 | while (select(maxfd, r, NULL, e, &seltime) == -1 && |
Damien Miller | d8968ad | 2008-07-04 23:10:49 +1000 | [diff] [blame] | 663 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) |
Ben Lindstrom | f945251 | 2001-02-15 03:12:08 +0000 | [diff] [blame] | 664 | ; |
| 665 | |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 666 | for (i = 0; i < maxfd; i++) { |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 667 | if (FD_ISSET(i, e)) { |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 668 | error("%s: exception!", fdcon[i].c_name); |
| 669 | confree(i); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 670 | } else if (FD_ISSET(i, r)) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 671 | conread(i); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 672 | } |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 673 | xfree(r); |
| 674 | xfree(e); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 675 | |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 676 | c = TAILQ_FIRST(&tq); |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 677 | while (c && (c->c_tv.tv_sec < now.tv_sec || |
| 678 | (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] | 679 | int s = c->c_fd; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 680 | |
Ben Lindstrom | 61c183b | 2002-06-21 00:09:54 +0000 | [diff] [blame] | 681 | c = TAILQ_NEXT(c, c_link); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 682 | conrecycle(s); |
| 683 | } |
| 684 | } |
| 685 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 686 | static void |
| 687 | do_host(char *host) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 688 | { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 689 | char *name = strnnsep(&host, " \t\n"); |
| 690 | int j; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 691 | |
Ben Lindstrom | eaffb9d | 2001-12-06 16:28:19 +0000 | [diff] [blame] | 692 | if (name == NULL) |
| 693 | return; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 694 | for (j = KT_RSA1; j <= KT_RSA; j *= 2) { |
| 695 | if (get_keytypes & j) { |
| 696 | while (ncon >= MAXCON) |
| 697 | conloop(); |
| 698 | conalloc(name, *host ? host : name, j); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 699 | } |
| 700 | } |
| 701 | } |
| 702 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 703 | void |
| 704 | fatal(const char *fmt,...) |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 705 | { |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 706 | va_list args; |
Ben Lindstrom | 965710f | 2002-07-07 22:17:22 +0000 | [diff] [blame] | 707 | |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 708 | va_start(args, fmt); |
| 709 | do_log(SYSLOG_LEVEL_FATAL, fmt, args); |
| 710 | va_end(args); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 711 | if (nonfatal_fatal) |
| 712 | longjmp(kexjmp, -1); |
Ben Lindstrom | 9c8edc9 | 2002-02-26 17:52:14 +0000 | [diff] [blame] | 713 | else |
Darren Tucker | 3d32622 | 2003-09-22 21:11:20 +1000 | [diff] [blame] | 714 | exit(255); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | static void |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 718 | usage(void) |
| 719 | { |
Damien Miller | c1719f7 | 2008-11-03 19:27:07 +1100 | [diff] [blame] | 720 | fprintf(stderr, |
| 721 | "usage: %s [-46Hv] [-f file] [-p port] [-T timeout] [-t type]\n" |
Darren Tucker | 34e314d | 2010-01-08 17:03:46 +1100 | [diff] [blame] | 722 | "\t\t [-V rdomain] [host | addrlist namelist] ...\n", |
Ben Lindstrom | ddfb1e3 | 2001-08-06 22:06:35 +0000 | [diff] [blame] | 723 | __progname); |
Ben Lindstrom | ddfb1e3 | 2001-08-06 22:06:35 +0000 | [diff] [blame] | 724 | exit(1); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | int |
| 728 | main(int argc, char **argv) |
| 729 | { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 730 | int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO; |
| 731 | int opt, fopt_count = 0; |
| 732 | char *tname; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 733 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 734 | extern int optind; |
| 735 | extern char *optarg; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 736 | |
Damien Miller | 59d3d5b | 2003-08-22 09:34:41 +1000 | [diff] [blame] | 737 | __progname = ssh_get_progname(argv[0]); |
Ben Lindstrom | 4e088e4 | 2001-10-10 20:45:43 +0000 | [diff] [blame] | 738 | init_rng(); |
| 739 | seed_rng(); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 740 | TAILQ_INIT(&tq); |
| 741 | |
Darren Tucker | ce321d8 | 2005-10-03 18:11:24 +1000 | [diff] [blame] | 742 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
| 743 | sanitise_stdfd(); |
| 744 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 745 | if (argc <= 1) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 746 | usage(); |
| 747 | |
Darren Tucker | 34e314d | 2010-01-08 17:03:46 +1100 | [diff] [blame] | 748 | while ((opt = getopt(argc, argv, "Hv46p:T:t:f:V:")) != -1) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 749 | switch (opt) { |
Damien Miller | db7b817 | 2005-03-01 21:48:03 +1100 | [diff] [blame] | 750 | case 'H': |
| 751 | hash_hosts = 1; |
| 752 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 753 | case 'p': |
| 754 | ssh_port = a2port(optarg); |
Damien Miller | 3dc71ad | 2009-01-28 16:31:22 +1100 | [diff] [blame] | 755 | if (ssh_port <= 0) { |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 756 | fprintf(stderr, "Bad port '%s'\n", optarg); |
| 757 | exit(1); |
| 758 | } |
| 759 | break; |
| 760 | case 'T': |
Ben Lindstrom | edd098b | 2002-07-04 00:07:13 +0000 | [diff] [blame] | 761 | timeout = convtime(optarg); |
| 762 | if (timeout == -1 || timeout == 0) { |
| 763 | fprintf(stderr, "Bad timeout '%s'\n", optarg); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 764 | usage(); |
Ben Lindstrom | edd098b | 2002-07-04 00:07:13 +0000 | [diff] [blame] | 765 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 766 | break; |
| 767 | case 'v': |
| 768 | if (!debug_flag) { |
| 769 | debug_flag = 1; |
| 770 | log_level = SYSLOG_LEVEL_DEBUG1; |
| 771 | } |
| 772 | else if (log_level < SYSLOG_LEVEL_DEBUG3) |
| 773 | log_level++; |
| 774 | else |
| 775 | fatal("Too high debugging level."); |
| 776 | break; |
Kevin Steves | 76e7d9b | 2001-09-20 20:30:09 +0000 | [diff] [blame] | 777 | case 'f': |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 778 | if (strcmp(optarg, "-") == 0) |
| 779 | optarg = NULL; |
| 780 | argv[fopt_count++] = optarg; |
| 781 | break; |
| 782 | case 't': |
| 783 | get_keytypes = 0; |
| 784 | tname = strtok(optarg, ","); |
| 785 | while (tname) { |
| 786 | int type = key_type_from_name(tname); |
| 787 | switch (type) { |
| 788 | case KEY_RSA1: |
| 789 | get_keytypes |= KT_RSA1; |
| 790 | break; |
| 791 | case KEY_DSA: |
| 792 | get_keytypes |= KT_DSA; |
| 793 | break; |
| 794 | case KEY_RSA: |
| 795 | get_keytypes |= KT_RSA; |
| 796 | break; |
| 797 | case KEY_UNSPEC: |
Ben Lindstrom | 28c603b | 2001-12-06 16:45:10 +0000 | [diff] [blame] | 798 | fatal("unknown key type %s", tname); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 799 | } |
| 800 | tname = strtok(NULL, ","); |
| 801 | } |
| 802 | break; |
| 803 | case '4': |
| 804 | IPv4or6 = AF_INET; |
| 805 | break; |
| 806 | case '6': |
| 807 | IPv4or6 = AF_INET6; |
| 808 | break; |
Darren Tucker | 34e314d | 2010-01-08 17:03:46 +1100 | [diff] [blame] | 809 | case 'V': |
Darren Tucker | 75456e8 | 2010-01-08 18:55:58 +1100 | [diff] [blame] | 810 | scan_rdomain = a2rdomain(optarg); |
| 811 | if (scan_rdomain == -1) { |
| 812 | fprintf(stderr, "Bad rdomain '%s'\n", optarg); |
| 813 | exit(1); |
| 814 | } |
Darren Tucker | 34e314d | 2010-01-08 17:03:46 +1100 | [diff] [blame] | 815 | break; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 816 | case '?': |
| 817 | default: |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 818 | usage(); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 819 | } |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 820 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 821 | if (optind == argc && !fopt_count) |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 822 | usage(); |
| 823 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 824 | log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1); |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 825 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 826 | maxfd = fdlim_get(1); |
| 827 | if (maxfd < 0) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 828 | fatal("%s: fdlim_get: bad value", __progname); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 829 | if (maxfd > MAXMAXFD) |
| 830 | maxfd = MAXMAXFD; |
Ben Lindstrom | d20b855 | 2001-03-05 07:01:18 +0000 | [diff] [blame] | 831 | if (MAXCON <= 0) |
Kevin Steves | fa72dda | 2000-12-15 18:39:12 +0000 | [diff] [blame] | 832 | fatal("%s: not enough file descriptors", __progname); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 833 | if (maxfd > fdlim_get(0)) |
| 834 | fdlim_set(maxfd); |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 835 | fdcon = xcalloc(maxfd, sizeof(con)); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 836 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 837 | read_wait_nfdset = howmany(maxfd, NFDBITS); |
| 838 | read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask)); |
Ben Lindstrom | c1e0421 | 2001-03-05 07:04:38 +0000 | [diff] [blame] | 839 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 840 | if (fopt_count) { |
| 841 | Linebuf *lb; |
| 842 | char *line; |
| 843 | int j; |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 844 | |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 845 | for (j = 0; j < fopt_count; j++) { |
| 846 | lb = Linebuf_alloc(argv[j], error); |
Ben Lindstrom | 78bbd9e | 2001-09-12 17:10:40 +0000 | [diff] [blame] | 847 | if (!lb) |
| 848 | continue; |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 849 | while ((line = Linebuf_getline(lb)) != NULL) |
| 850 | do_host(line); |
| 851 | Linebuf_free(lb); |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 852 | } |
Ben Lindstrom | 325e70c | 2001-08-06 22:41:30 +0000 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | while (optind < argc) |
| 856 | do_host(argv[optind++]); |
| 857 | |
Ben Lindstrom | b6434ae | 2000-12-05 01:15:09 +0000 | [diff] [blame] | 858 | while (ncon > 0) |
| 859 | conloop(); |
| 860 | |
| 861 | return (0); |
| 862 | } |