djm@openbsd.org | 9576726 | 2016-03-07 19:02:43 +0000 | [diff] [blame] | 1 | /* $OpenBSD: monitor_wrap.c,v 1.88 2016/03/07 19:02:43 djm Exp $ */ |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright 2002 Niels Provos <provos@citi.umich.edu> |
| 4 | * Copyright 2002 Markus Friedl <markus@openbsd.org> |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include "includes.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 29 | |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 30 | #include <sys/types.h> |
Darren Tucker | 1a3d6e7 | 2006-08-05 18:46:47 +1000 | [diff] [blame] | 31 | #include <sys/uio.h> |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 32 | |
Darren Tucker | 3997249 | 2006-07-12 22:22:46 +1000 | [diff] [blame] | 33 | #include <errno.h> |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 34 | #include <pwd.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 35 | #include <signal.h> |
Damien Miller | ded319c | 2006-09-01 15:38:36 +1000 | [diff] [blame] | 36 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 37 | #include <stdio.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 38 | #include <string.h> |
Darren Tucker | 1a3d6e7 | 2006-08-05 18:46:47 +1000 | [diff] [blame] | 39 | #include <unistd.h> |
Damien Miller | 9f2abc4 | 2006-07-10 20:53:08 +1000 | [diff] [blame] | 40 | |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 41 | #ifdef WITH_OPENSSL |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 42 | #include <openssl/bn.h> |
| 43 | #include <openssl/dh.h> |
Damien Miller | 01ed227 | 2008-11-05 16:20:46 +1100 | [diff] [blame] | 44 | #include <openssl/evp.h> |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 45 | #endif |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 46 | |
Damien Miller | b84886b | 2008-05-19 15:05:07 +1000 | [diff] [blame] | 47 | #include "openbsd-compat/sys-queue.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 48 | #include "xmalloc.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 49 | #include "ssh.h" |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 50 | #ifdef WITH_OPENSSL |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 51 | #include "dh.h" |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 52 | #endif |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 53 | #include "buffer.h" |
| 54 | #include "key.h" |
| 55 | #include "cipher.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 56 | #include "kex.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 57 | #include "hostfile.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 58 | #include "auth.h" |
Damien Miller | 06ebedf | 2003-02-24 12:03:38 +1100 | [diff] [blame] | 59 | #include "auth-options.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 60 | #include "packet.h" |
| 61 | #include "mac.h" |
| 62 | #include "log.h" |
Darren Tucker | 01558b7 | 2016-07-18 09:33:25 +1000 | [diff] [blame^] | 63 | #include "auth-pam.h" |
Ben Lindstrom | 036768e | 2004-04-08 16:12:30 +0000 | [diff] [blame] | 64 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
| 65 | #undef TARGET_OS_MAC |
Ben Lindstrom | 1b9f2a6 | 2004-04-08 05:11:03 +0000 | [diff] [blame] | 66 | #include "zlib.h" |
Ben Lindstrom | 036768e | 2004-04-08 16:12:30 +0000 | [diff] [blame] | 67 | #define TARGET_OS_MAC 1 |
| 68 | #else |
| 69 | #include "zlib.h" |
| 70 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 71 | #include "monitor.h" |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 72 | #ifdef GSSAPI |
| 73 | #include "ssh-gss.h" |
| 74 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 75 | #include "monitor_wrap.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 76 | #include "atomicio.h" |
| 77 | #include "monitor_fdpass.h" |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 78 | #include "misc.h" |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 79 | #include "uuencode.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 80 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 81 | #include "channels.h" |
| 82 | #include "session.h" |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 83 | #include "servconf.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 84 | |
markus@openbsd.org | 091c302 | 2015-01-19 19:52:16 +0000 | [diff] [blame] | 85 | #include "ssherr.h" |
| 86 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 87 | /* Imports */ |
| 88 | extern int compat20; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 89 | extern z_stream incoming_stream; |
| 90 | extern z_stream outgoing_stream; |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 91 | extern struct monitor *pmonitor; |
Darren Tucker | 0999174 | 2004-07-17 17:05:14 +1000 | [diff] [blame] | 92 | extern Buffer loginmsg; |
Damien Miller | 4e448a3 | 2003-05-14 15:11:48 +1000 | [diff] [blame] | 93 | extern ServerOptions options; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 94 | |
Damien Miller | 8f0bf23 | 2011-06-20 14:42:23 +1000 | [diff] [blame] | 95 | void |
| 96 | mm_log_handler(LogLevel level, const char *msg, void *ctx) |
| 97 | { |
| 98 | Buffer log_msg; |
| 99 | struct monitor *mon = (struct monitor *)ctx; |
| 100 | |
| 101 | if (mon->m_log_sendfd == -1) |
| 102 | fatal("%s: no log channel", __func__); |
| 103 | |
| 104 | buffer_init(&log_msg); |
| 105 | /* |
| 106 | * Placeholder for packet length. Will be filled in with the actual |
| 107 | * packet length once the packet has been constucted. This saves |
| 108 | * fragile math. |
| 109 | */ |
| 110 | buffer_put_int(&log_msg, 0); |
| 111 | |
| 112 | buffer_put_int(&log_msg, level); |
| 113 | buffer_put_cstring(&log_msg, msg); |
| 114 | put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4); |
| 115 | if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg), |
| 116 | buffer_len(&log_msg)) != buffer_len(&log_msg)) |
| 117 | fatal("%s: write: %s", __func__, strerror(errno)); |
| 118 | buffer_free(&log_msg); |
| 119 | } |
| 120 | |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 121 | int |
| 122 | mm_is_monitor(void) |
| 123 | { |
| 124 | /* |
| 125 | * m_pid is only set in the privileged part, and |
| 126 | * points to the unprivileged child. |
| 127 | */ |
Darren Tucker | a47c9bc | 2003-11-03 20:03:25 +1100 | [diff] [blame] | 128 | return (pmonitor && pmonitor->m_pid > 0); |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 129 | } |
| 130 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 131 | void |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 132 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 133 | { |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 134 | u_int mlen = buffer_len(m); |
Ben Lindstrom | b1bdc5a | 2002-07-04 00:09:26 +0000 | [diff] [blame] | 135 | u_char buf[5]; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 136 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 137 | debug3("%s entering: type %d", __func__, type); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 138 | |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 139 | put_u32(buf, mlen + 1); |
Ben Lindstrom | cb72e4f | 2002-06-21 00:41:51 +0000 | [diff] [blame] | 140 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 141 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 142 | fatal("%s: write: %s", __func__, strerror(errno)); |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 143 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 144 | fatal("%s: write: %s", __func__, strerror(errno)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | void |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 148 | mm_request_receive(int sock, Buffer *m) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 149 | { |
| 150 | u_char buf[4]; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 151 | u_int msg_len; |
| 152 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 153 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 154 | |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 155 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
Damien Miller | 4d24b3b | 2015-03-20 09:11:59 +1100 | [diff] [blame] | 156 | if (errno == EPIPE) |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 157 | cleanup_exit(255); |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 158 | fatal("%s: read: %s", __func__, strerror(errno)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 159 | } |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 160 | msg_len = get_u32(buf); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 161 | if (msg_len > 256 * 1024) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 162 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 163 | buffer_clear(m); |
| 164 | buffer_append_space(m, msg_len); |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 165 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
| 166 | fatal("%s: read: %s", __func__, strerror(errno)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | void |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 170 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 171 | { |
| 172 | u_char rtype; |
| 173 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 174 | debug3("%s entering: type %d", __func__, type); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 175 | |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 176 | mm_request_receive(sock, m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 177 | rtype = buffer_get_char(m); |
| 178 | if (rtype != type) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 179 | fatal("%s: read: rtype %d != type %d", __func__, |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 180 | rtype, type); |
| 181 | } |
| 182 | |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 183 | #ifdef WITH_OPENSSL |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 184 | DH * |
| 185 | mm_choose_dh(int min, int nbits, int max) |
| 186 | { |
| 187 | BIGNUM *p, *g; |
| 188 | int success = 0; |
| 189 | Buffer m; |
| 190 | |
| 191 | buffer_init(&m); |
| 192 | buffer_put_int(&m, min); |
| 193 | buffer_put_int(&m, nbits); |
| 194 | buffer_put_int(&m, max); |
| 195 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 196 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 197 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 198 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 199 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 200 | |
| 201 | success = buffer_get_char(&m); |
| 202 | if (success == 0) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 203 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 204 | |
| 205 | if ((p = BN_new()) == NULL) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 206 | fatal("%s: BN_new failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 207 | if ((g = BN_new()) == NULL) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 208 | fatal("%s: BN_new failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 209 | buffer_get_bignum2(&m, p); |
| 210 | buffer_get_bignum2(&m, g); |
| 211 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 212 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 213 | buffer_free(&m); |
| 214 | |
| 215 | return (dh_new_group(g, p)); |
| 216 | } |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 217 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 218 | |
| 219 | int |
djm@openbsd.org | 523463a | 2015-02-16 22:13:32 +0000 | [diff] [blame] | 220 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, |
markus@openbsd.org | 76c9fbb | 2015-12-04 16:41:28 +0000 | [diff] [blame] | 221 | const u_char *data, u_int datalen, const char *hostkey_alg) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 222 | { |
markus@openbsd.org | 57d10cb | 2015-01-19 20:16:15 +0000 | [diff] [blame] | 223 | struct kex *kex = *pmonitor->m_pkex; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 224 | Buffer m; |
| 225 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 226 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 227 | |
| 228 | buffer_init(&m); |
djm@openbsd.org | 523463a | 2015-02-16 22:13:32 +0000 | [diff] [blame] | 229 | buffer_put_int(&m, kex->host_key_index(key, 0, active_state)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 230 | buffer_put_string(&m, data, datalen); |
markus@openbsd.org | 76c9fbb | 2015-12-04 16:41:28 +0000 | [diff] [blame] | 231 | buffer_put_cstring(&m, hostkey_alg); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 232 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 233 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 234 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 235 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 236 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 237 | *sigp = buffer_get_string(&m, lenp); |
| 238 | buffer_free(&m); |
| 239 | |
| 240 | return (0); |
| 241 | } |
| 242 | |
| 243 | struct passwd * |
Darren Tucker | b09b677 | 2004-06-22 15:06:46 +1000 | [diff] [blame] | 244 | mm_getpwnamallow(const char *username) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 245 | { |
| 246 | Buffer m; |
| 247 | struct passwd *pw; |
Damien Miller | d8478b6 | 2011-05-29 21:39:36 +1000 | [diff] [blame] | 248 | u_int len, i; |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 249 | ServerOptions *newopts; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 250 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 251 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 252 | |
| 253 | buffer_init(&m); |
Darren Tucker | b09b677 | 2004-06-22 15:06:46 +1000 | [diff] [blame] | 254 | buffer_put_cstring(&m, username); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 255 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 256 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 257 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 258 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 259 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 260 | |
| 261 | if (buffer_get_char(&m) == 0) { |
Darren Tucker | 2f8b3d9 | 2007-12-02 23:02:15 +1100 | [diff] [blame] | 262 | pw = NULL; |
| 263 | goto out; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 264 | } |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 265 | pw = buffer_get_string(&m, &len); |
| 266 | if (len != sizeof(struct passwd)) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 267 | fatal("%s: struct passwd size mismatch", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 268 | pw->pw_name = buffer_get_string(&m, NULL); |
| 269 | pw->pw_passwd = buffer_get_string(&m, NULL); |
Damien Miller | 6332da2 | 2013-04-23 14:25:52 +1000 | [diff] [blame] | 270 | #ifdef HAVE_STRUCT_PASSWD_PW_GECOS |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 271 | pw->pw_gecos = buffer_get_string(&m, NULL); |
Damien Miller | 6332da2 | 2013-04-23 14:25:52 +1000 | [diff] [blame] | 272 | #endif |
| 273 | #ifdef HAVE_STRUCT_PASSWD_PW_CLASS |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 274 | pw->pw_class = buffer_get_string(&m, NULL); |
Kevin Steves | 7e14760 | 2002-03-22 18:07:17 +0000 | [diff] [blame] | 275 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 276 | pw->pw_dir = buffer_get_string(&m, NULL); |
| 277 | pw->pw_shell = buffer_get_string(&m, NULL); |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 278 | |
Darren Tucker | 2f8b3d9 | 2007-12-02 23:02:15 +1100 | [diff] [blame] | 279 | out: |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 280 | /* copy options block as a Match directive may have changed some */ |
| 281 | newopts = buffer_get_string(&m, &len); |
| 282 | if (len != sizeof(*newopts)) |
| 283 | fatal("%s: option block size mismatch", __func__); |
Damien Miller | f2e407e | 2011-05-20 19:04:14 +1000 | [diff] [blame] | 284 | |
| 285 | #define M_CP_STROPT(x) do { \ |
| 286 | if (newopts->x != NULL) \ |
| 287 | newopts->x = buffer_get_string(&m, NULL); \ |
| 288 | } while (0) |
Damien Miller | d8478b6 | 2011-05-29 21:39:36 +1000 | [diff] [blame] | 289 | #define M_CP_STRARRAYOPT(x, nx) do { \ |
| 290 | for (i = 0; i < newopts->nx; i++) \ |
| 291 | newopts->x[i] = buffer_get_string(&m, NULL); \ |
| 292 | } while (0) |
Damien Miller | f2e407e | 2011-05-20 19:04:14 +1000 | [diff] [blame] | 293 | /* See comment in servconf.h */ |
| 294 | COPY_MATCH_STRING_OPTS(); |
| 295 | #undef M_CP_STROPT |
Damien Miller | d8478b6 | 2011-05-29 21:39:36 +1000 | [diff] [blame] | 296 | #undef M_CP_STRARRAYOPT |
Damien Miller | f2e407e | 2011-05-20 19:04:14 +1000 | [diff] [blame] | 297 | |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 298 | copy_set_server_options(&options, newopts, 1); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 299 | free(newopts); |
Darren Tucker | 1629c07 | 2007-02-19 22:25:37 +1100 | [diff] [blame] | 300 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 301 | buffer_free(&m); |
| 302 | |
| 303 | return (pw); |
| 304 | } |
| 305 | |
Darren Tucker | 7eb3de0 | 2003-10-15 15:56:58 +1000 | [diff] [blame] | 306 | char * |
| 307 | mm_auth2_read_banner(void) |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 308 | { |
| 309 | Buffer m; |
| 310 | char *banner; |
| 311 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 312 | debug3("%s entering", __func__); |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 313 | |
| 314 | buffer_init(&m); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 315 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 316 | buffer_clear(&m); |
| 317 | |
Darren Tucker | 7eb3de0 | 2003-10-15 15:56:58 +1000 | [diff] [blame] | 318 | mm_request_receive_expect(pmonitor->m_recvfd, |
| 319 | MONITOR_ANS_AUTH2_READ_BANNER, &m); |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 320 | banner = buffer_get_string(&m, NULL); |
| 321 | buffer_free(&m); |
Ben Lindstrom | cb72e4f | 2002-06-21 00:41:51 +0000 | [diff] [blame] | 322 | |
Darren Tucker | 7eb3de0 | 2003-10-15 15:56:58 +1000 | [diff] [blame] | 323 | /* treat empty banner as missing banner */ |
| 324 | if (strlen(banner) == 0) { |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 325 | free(banner); |
Darren Tucker | 7eb3de0 | 2003-10-15 15:56:58 +1000 | [diff] [blame] | 326 | banner = NULL; |
| 327 | } |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 328 | return (banner); |
| 329 | } |
| 330 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 331 | /* Inform the privileged process about service and style */ |
| 332 | |
| 333 | void |
| 334 | mm_inform_authserv(char *service, char *style) |
| 335 | { |
| 336 | Buffer m; |
| 337 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 338 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 339 | |
| 340 | buffer_init(&m); |
| 341 | buffer_put_cstring(&m, service); |
| 342 | buffer_put_cstring(&m, style ? style : ""); |
| 343 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 344 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 345 | |
| 346 | buffer_free(&m); |
| 347 | } |
| 348 | |
| 349 | /* Do the password authentication */ |
| 350 | int |
| 351 | mm_auth_password(Authctxt *authctxt, char *password) |
| 352 | { |
| 353 | Buffer m; |
| 354 | int authenticated = 0; |
| 355 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 356 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 357 | |
| 358 | buffer_init(&m); |
| 359 | buffer_put_cstring(&m, password); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 360 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 361 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 362 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 363 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 364 | |
| 365 | authenticated = buffer_get_int(&m); |
Darren Tucker | 01558b7 | 2016-07-18 09:33:25 +1000 | [diff] [blame^] | 366 | #ifdef USE_PAM |
| 367 | sshpam_set_maxtries_reached(buffer_get_int(&m)); |
| 368 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 369 | |
| 370 | buffer_free(&m); |
| 371 | |
| 372 | debug3("%s: user %sauthenticated", |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 373 | __func__, authenticated ? "" : "not "); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 374 | return (authenticated); |
| 375 | } |
| 376 | |
| 377 | int |
djm@openbsd.org | 179be0f | 2015-05-01 03:23:51 +0000 | [diff] [blame] | 378 | mm_user_key_allowed(struct passwd *pw, Key *key, int pubkey_auth_attempt) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 379 | { |
djm@openbsd.org | 179be0f | 2015-05-01 03:23:51 +0000 | [diff] [blame] | 380 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key, |
| 381 | pubkey_auth_attempt)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | int |
djm@openbsd.org | 9576726 | 2016-03-07 19:02:43 +0000 | [diff] [blame] | 385 | mm_hostbased_key_allowed(struct passwd *pw, const char *user, const char *host, |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 386 | Key *key) |
| 387 | { |
djm@openbsd.org | 179be0f | 2015-05-01 03:23:51 +0000 | [diff] [blame] | 388 | return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | int |
djm@openbsd.org | 9576726 | 2016-03-07 19:02:43 +0000 | [diff] [blame] | 392 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, const char *user, |
| 393 | const char *host, Key *key) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 394 | { |
| 395 | int ret; |
| 396 | |
| 397 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ |
djm@openbsd.org | 179be0f | 2015-05-01 03:23:51 +0000 | [diff] [blame] | 398 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key, 0); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 399 | key->type = KEY_RSA1; |
| 400 | return (ret); |
| 401 | } |
| 402 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 403 | int |
djm@openbsd.org | 9576726 | 2016-03-07 19:02:43 +0000 | [diff] [blame] | 404 | mm_key_allowed(enum mm_keytype type, const char *user, const char *host, |
| 405 | Key *key, int pubkey_auth_attempt) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 406 | { |
| 407 | Buffer m; |
| 408 | u_char *blob; |
| 409 | u_int len; |
Damien Miller | 06ebedf | 2003-02-24 12:03:38 +1100 | [diff] [blame] | 410 | int allowed = 0, have_forced = 0; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 411 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 412 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 413 | |
| 414 | /* Convert the key to a blob and the pass it over */ |
| 415 | if (!key_to_blob(key, &blob, &len)) |
| 416 | return (0); |
| 417 | |
| 418 | buffer_init(&m); |
| 419 | buffer_put_int(&m, type); |
| 420 | buffer_put_cstring(&m, user ? user : ""); |
| 421 | buffer_put_cstring(&m, host ? host : ""); |
| 422 | buffer_put_string(&m, blob, len); |
djm@openbsd.org | 179be0f | 2015-05-01 03:23:51 +0000 | [diff] [blame] | 423 | buffer_put_int(&m, pubkey_auth_attempt); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 424 | free(blob); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 425 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 426 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 427 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 428 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 429 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 430 | |
| 431 | allowed = buffer_get_int(&m); |
| 432 | |
Damien Miller | 06ebedf | 2003-02-24 12:03:38 +1100 | [diff] [blame] | 433 | /* fake forced command */ |
| 434 | auth_clear_options(); |
| 435 | have_forced = buffer_get_int(&m); |
| 436 | forced_command = have_forced ? xstrdup("true") : NULL; |
| 437 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 438 | buffer_free(&m); |
| 439 | |
| 440 | return (allowed); |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * This key verify needs to send the key type along, because the |
| 445 | * privileged parent makes the decision if the key is allowed |
| 446 | * for authentication. |
| 447 | */ |
| 448 | |
| 449 | int |
| 450 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) |
| 451 | { |
| 452 | Buffer m; |
| 453 | u_char *blob; |
| 454 | u_int len; |
| 455 | int verified = 0; |
| 456 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 457 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 458 | |
| 459 | /* Convert the key to a blob and the pass it over */ |
| 460 | if (!key_to_blob(key, &blob, &len)) |
| 461 | return (0); |
| 462 | |
| 463 | buffer_init(&m); |
| 464 | buffer_put_string(&m, blob, len); |
| 465 | buffer_put_string(&m, sig, siglen); |
| 466 | buffer_put_string(&m, data, datalen); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 467 | free(blob); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 468 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 469 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 470 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 471 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 472 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 473 | |
| 474 | verified = buffer_get_int(&m); |
| 475 | |
| 476 | buffer_free(&m); |
| 477 | |
| 478 | return (verified); |
| 479 | } |
| 480 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 481 | void |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 482 | mm_send_keystate(struct monitor *monitor) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 483 | { |
markus@openbsd.org | 091c302 | 2015-01-19 19:52:16 +0000 | [diff] [blame] | 484 | struct ssh *ssh = active_state; /* XXX */ |
| 485 | struct sshbuf *m; |
| 486 | int r; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 487 | |
markus@openbsd.org | 091c302 | 2015-01-19 19:52:16 +0000 | [diff] [blame] | 488 | if ((m = sshbuf_new()) == NULL) |
| 489 | fatal("%s: sshbuf_new failed", __func__); |
| 490 | if ((r = ssh_packet_get_state(ssh, m)) != 0) |
| 491 | fatal("%s: get_state failed: %s", |
| 492 | __func__, ssh_err(r)); |
| 493 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m); |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 494 | debug3("%s: Finished sending state", __func__); |
markus@openbsd.org | 091c302 | 2015-01-19 19:52:16 +0000 | [diff] [blame] | 495 | sshbuf_free(m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | int |
Damien Miller | 71a7367 | 2006-03-26 14:04:36 +1100 | [diff] [blame] | 499 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 500 | { |
| 501 | Buffer m; |
Darren Tucker | 0999174 | 2004-07-17 17:05:14 +1000 | [diff] [blame] | 502 | char *p, *msg; |
Damien Miller | 7207f64 | 2008-05-19 15:34:50 +1000 | [diff] [blame] | 503 | int success = 0, tmp1 = -1, tmp2 = -1; |
| 504 | |
| 505 | /* Kludge: ensure there are fds free to receive the pty/tty */ |
| 506 | if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || |
| 507 | (tmp2 = dup(pmonitor->m_recvfd)) == -1) { |
| 508 | error("%s: cannot allocate fds for pty", __func__); |
| 509 | if (tmp1 > 0) |
| 510 | close(tmp1); |
| 511 | if (tmp2 > 0) |
| 512 | close(tmp2); |
| 513 | return 0; |
| 514 | } |
| 515 | close(tmp1); |
| 516 | close(tmp2); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 517 | |
| 518 | buffer_init(&m); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 519 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 520 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 521 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 522 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 523 | |
| 524 | success = buffer_get_int(&m); |
| 525 | if (success == 0) { |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 526 | debug3("%s: pty alloc failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 527 | buffer_free(&m); |
| 528 | return (0); |
| 529 | } |
| 530 | p = buffer_get_string(&m, NULL); |
Darren Tucker | 0999174 | 2004-07-17 17:05:14 +1000 | [diff] [blame] | 531 | msg = buffer_get_string(&m, NULL); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 532 | buffer_free(&m); |
| 533 | |
| 534 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 535 | free(p); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 536 | |
Darren Tucker | 0999174 | 2004-07-17 17:05:14 +1000 | [diff] [blame] | 537 | buffer_append(&loginmsg, msg, strlen(msg)); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 538 | free(msg); |
Darren Tucker | 0999174 | 2004-07-17 17:05:14 +1000 | [diff] [blame] | 539 | |
Damien Miller | 54fd7cf | 2007-09-17 12:04:08 +1000 | [diff] [blame] | 540 | if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || |
| 541 | (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) |
| 542 | fatal("%s: receive fds failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 543 | |
| 544 | /* Success */ |
| 545 | return (1); |
| 546 | } |
| 547 | |
| 548 | void |
Darren Tucker | 3e33cec | 2003-10-02 16:12:36 +1000 | [diff] [blame] | 549 | mm_session_pty_cleanup2(Session *s) |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 550 | { |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 551 | Buffer m; |
| 552 | |
| 553 | if (s->ttyfd == -1) |
| 554 | return; |
| 555 | buffer_init(&m); |
| 556 | buffer_put_cstring(&m, s->tty); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 557 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 558 | buffer_free(&m); |
| 559 | |
| 560 | /* closed dup'ed master */ |
Damien Miller | 7207f64 | 2008-05-19 15:34:50 +1000 | [diff] [blame] | 561 | if (s->ptymaster != -1 && close(s->ptymaster) < 0) |
| 562 | error("close(s->ptymaster/%d): %s", |
| 563 | s->ptymaster, strerror(errno)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 564 | |
| 565 | /* unlink pty from session */ |
| 566 | s->ttyfd = -1; |
| 567 | } |
| 568 | |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 569 | #ifdef USE_PAM |
| 570 | void |
Darren Tucker | dbf7a74 | 2004-03-08 23:04:06 +1100 | [diff] [blame] | 571 | mm_start_pam(Authctxt *authctxt) |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 572 | { |
| 573 | Buffer m; |
| 574 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 575 | debug3("%s entering", __func__); |
Damien Miller | 4e448a3 | 2003-05-14 15:11:48 +1000 | [diff] [blame] | 576 | if (!options.use_pam) |
| 577 | fatal("UsePAM=no, but ended up in %s anyway", __func__); |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 578 | |
| 579 | buffer_init(&m); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 580 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 581 | |
| 582 | buffer_free(&m); |
| 583 | } |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 584 | |
Damien Miller | 1f499fd | 2003-08-25 13:08:49 +1000 | [diff] [blame] | 585 | u_int |
| 586 | mm_do_pam_account(void) |
| 587 | { |
| 588 | Buffer m; |
| 589 | u_int ret; |
Darren Tucker | 77fc29e | 2004-09-11 23:07:03 +1000 | [diff] [blame] | 590 | char *msg; |
Damien Miller | 1f499fd | 2003-08-25 13:08:49 +1000 | [diff] [blame] | 591 | |
| 592 | debug3("%s entering", __func__); |
| 593 | if (!options.use_pam) |
| 594 | fatal("UsePAM=no, but ended up in %s anyway", __func__); |
| 595 | |
| 596 | buffer_init(&m); |
| 597 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); |
| 598 | |
Damien Miller | a8e06ce | 2003-11-21 23:48:55 +1100 | [diff] [blame] | 599 | mm_request_receive_expect(pmonitor->m_recvfd, |
Damien Miller | 1f499fd | 2003-08-25 13:08:49 +1000 | [diff] [blame] | 600 | MONITOR_ANS_PAM_ACCOUNT, &m); |
| 601 | ret = buffer_get_int(&m); |
Darren Tucker | 77fc29e | 2004-09-11 23:07:03 +1000 | [diff] [blame] | 602 | msg = buffer_get_string(&m, NULL); |
| 603 | buffer_append(&loginmsg, msg, strlen(msg)); |
Darren Tucker | f60845f | 2013-06-02 08:07:31 +1000 | [diff] [blame] | 604 | free(msg); |
Damien Miller | 1f499fd | 2003-08-25 13:08:49 +1000 | [diff] [blame] | 605 | |
| 606 | buffer_free(&m); |
Damien Miller | 787b2ec | 2003-11-21 23:56:47 +1100 | [diff] [blame] | 607 | |
Damien Miller | 1f499fd | 2003-08-25 13:08:49 +1000 | [diff] [blame] | 608 | debug3("%s returning %d", __func__, ret); |
| 609 | |
| 610 | return (ret); |
| 611 | } |
| 612 | |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 613 | void * |
| 614 | mm_sshpam_init_ctx(Authctxt *authctxt) |
| 615 | { |
| 616 | Buffer m; |
| 617 | int success; |
| 618 | |
| 619 | debug3("%s", __func__); |
| 620 | buffer_init(&m); |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 621 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); |
| 622 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); |
| 623 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); |
| 624 | success = buffer_get_int(&m); |
| 625 | if (success == 0) { |
| 626 | debug3("%s: pam_init_ctx failed", __func__); |
| 627 | buffer_free(&m); |
| 628 | return (NULL); |
| 629 | } |
| 630 | buffer_free(&m); |
| 631 | return (authctxt); |
| 632 | } |
| 633 | |
| 634 | int |
| 635 | mm_sshpam_query(void *ctx, char **name, char **info, |
| 636 | u_int *num, char ***prompts, u_int **echo_on) |
| 637 | { |
| 638 | Buffer m; |
Damien Miller | 04b6533 | 2005-07-17 17:53:31 +1000 | [diff] [blame] | 639 | u_int i; |
| 640 | int ret; |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 641 | |
| 642 | debug3("%s", __func__); |
| 643 | buffer_init(&m); |
| 644 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); |
| 645 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); |
| 646 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); |
| 647 | ret = buffer_get_int(&m); |
| 648 | debug3("%s: pam_query returned %d", __func__, ret); |
| 649 | *name = buffer_get_string(&m, NULL); |
| 650 | *info = buffer_get_string(&m, NULL); |
Darren Tucker | 01558b7 | 2016-07-18 09:33:25 +1000 | [diff] [blame^] | 651 | sshpam_set_maxtries_reached(buffer_get_int(&m)); |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 652 | *num = buffer_get_int(&m); |
Darren Tucker | d8093e4 | 2006-05-04 16:24:34 +1000 | [diff] [blame] | 653 | if (*num > PAM_MAX_NUM_MSG) |
| 654 | fatal("%s: recieved %u PAM messages, expected <= %u", |
| 655 | __func__, *num, PAM_MAX_NUM_MSG); |
| 656 | *prompts = xcalloc((*num + 1), sizeof(char *)); |
| 657 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 658 | for (i = 0; i < *num; ++i) { |
| 659 | (*prompts)[i] = buffer_get_string(&m, NULL); |
| 660 | (*echo_on)[i] = buffer_get_int(&m); |
| 661 | } |
| 662 | buffer_free(&m); |
| 663 | return (ret); |
| 664 | } |
| 665 | |
| 666 | int |
| 667 | mm_sshpam_respond(void *ctx, u_int num, char **resp) |
| 668 | { |
| 669 | Buffer m; |
Damien Miller | 04b6533 | 2005-07-17 17:53:31 +1000 | [diff] [blame] | 670 | u_int i; |
| 671 | int ret; |
Damien Miller | 4f9f42a | 2003-05-10 19:28:02 +1000 | [diff] [blame] | 672 | |
| 673 | debug3("%s", __func__); |
| 674 | buffer_init(&m); |
| 675 | buffer_put_int(&m, num); |
| 676 | for (i = 0; i < num; ++i) |
| 677 | buffer_put_cstring(&m, resp[i]); |
| 678 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); |
| 679 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); |
| 680 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); |
| 681 | ret = buffer_get_int(&m); |
| 682 | debug3("%s: pam_respond returned %d", __func__, ret); |
| 683 | buffer_free(&m); |
| 684 | return (ret); |
| 685 | } |
| 686 | |
| 687 | void |
| 688 | mm_sshpam_free_ctx(void *ctxtp) |
| 689 | { |
| 690 | Buffer m; |
| 691 | |
| 692 | debug3("%s", __func__); |
| 693 | buffer_init(&m); |
| 694 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); |
| 695 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); |
| 696 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); |
| 697 | buffer_free(&m); |
| 698 | } |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 699 | #endif /* USE_PAM */ |
| 700 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 701 | /* Request process termination */ |
| 702 | |
| 703 | void |
| 704 | mm_terminate(void) |
| 705 | { |
| 706 | Buffer m; |
| 707 | |
| 708 | buffer_init(&m); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 709 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 710 | buffer_free(&m); |
| 711 | } |
| 712 | |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 713 | #ifdef WITH_SSH1 |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 714 | int |
| 715 | mm_ssh1_session_key(BIGNUM *num) |
| 716 | { |
| 717 | int rsafail; |
| 718 | Buffer m; |
| 719 | |
| 720 | buffer_init(&m); |
| 721 | buffer_put_bignum2(&m, num); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 722 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 723 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 724 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 725 | |
| 726 | rsafail = buffer_get_int(&m); |
| 727 | buffer_get_bignum2(&m, num); |
| 728 | |
| 729 | buffer_free(&m); |
| 730 | |
| 731 | return (rsafail); |
| 732 | } |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 733 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 734 | |
| 735 | static void |
| 736 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, |
| 737 | char ***prompts, u_int **echo_on) |
| 738 | { |
Ben Lindstrom | cb72e4f | 2002-06-21 00:41:51 +0000 | [diff] [blame] | 739 | *name = xstrdup(""); |
| 740 | *infotxt = xstrdup(""); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 741 | *numprompts = 1; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 742 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
| 743 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 744 | (*echo_on)[0] = 0; |
| 745 | } |
| 746 | |
| 747 | int |
| 748 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, |
| 749 | u_int *numprompts, char ***prompts, u_int **echo_on) |
| 750 | { |
| 751 | Buffer m; |
Damien Miller | b7df3af | 2003-02-24 11:55:46 +1100 | [diff] [blame] | 752 | u_int success; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 753 | char *challenge; |
| 754 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 755 | debug3("%s: entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 756 | |
| 757 | buffer_init(&m); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 758 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 759 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 760 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 761 | &m); |
Damien Miller | b7df3af | 2003-02-24 11:55:46 +1100 | [diff] [blame] | 762 | success = buffer_get_int(&m); |
| 763 | if (success == 0) { |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 764 | debug3("%s: no challenge", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 765 | buffer_free(&m); |
| 766 | return (-1); |
| 767 | } |
| 768 | |
| 769 | /* Get the challenge, and format the response */ |
| 770 | challenge = buffer_get_string(&m, NULL); |
| 771 | buffer_free(&m); |
| 772 | |
| 773 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); |
| 774 | (*prompts)[0] = challenge; |
| 775 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 776 | debug3("%s: received challenge: %s", __func__, challenge); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 777 | |
| 778 | return (0); |
| 779 | } |
| 780 | |
| 781 | int |
| 782 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) |
| 783 | { |
| 784 | Buffer m; |
| 785 | int authok; |
| 786 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 787 | debug3("%s: entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 788 | if (numresponses != 1) |
| 789 | return (-1); |
| 790 | |
| 791 | buffer_init(&m); |
| 792 | buffer_put_cstring(&m, responses[0]); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 793 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 794 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 795 | mm_request_receive_expect(pmonitor->m_recvfd, |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 796 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
| 797 | |
| 798 | authok = buffer_get_int(&m); |
| 799 | buffer_free(&m); |
| 800 | |
| 801 | return ((authok == 0) ? -1 : 0); |
| 802 | } |
| 803 | |
Darren Tucker | 042e2e8 | 2004-07-08 23:09:42 +1000 | [diff] [blame] | 804 | #ifdef SKEY |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 805 | int |
| 806 | mm_skey_query(void *ctx, char **name, char **infotxt, |
| 807 | u_int *numprompts, char ***prompts, u_int **echo_on) |
| 808 | { |
| 809 | Buffer m; |
Damien Miller | b7df3af | 2003-02-24 11:55:46 +1100 | [diff] [blame] | 810 | u_int success; |
Darren Tucker | d6a23f2 | 2006-08-05 18:50:35 +1000 | [diff] [blame] | 811 | char *challenge; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 812 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 813 | debug3("%s: entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 814 | |
| 815 | buffer_init(&m); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 816 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 817 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 818 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 819 | &m); |
Damien Miller | b7df3af | 2003-02-24 11:55:46 +1100 | [diff] [blame] | 820 | success = buffer_get_int(&m); |
| 821 | if (success == 0) { |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 822 | debug3("%s: no challenge", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 823 | buffer_free(&m); |
| 824 | return (-1); |
| 825 | } |
| 826 | |
| 827 | /* Get the challenge, and format the response */ |
| 828 | challenge = buffer_get_string(&m, NULL); |
| 829 | buffer_free(&m); |
| 830 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 831 | debug3("%s: received challenge: %s", __func__, challenge); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 832 | |
| 833 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); |
| 834 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 835 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
Darren Tucker | f60845f | 2013-06-02 08:07:31 +1000 | [diff] [blame] | 836 | free(challenge); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 837 | |
| 838 | return (0); |
| 839 | } |
| 840 | |
| 841 | int |
| 842 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) |
| 843 | { |
| 844 | Buffer m; |
| 845 | int authok; |
| 846 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 847 | debug3("%s: entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 848 | if (numresponses != 1) |
| 849 | return (-1); |
| 850 | |
| 851 | buffer_init(&m); |
| 852 | buffer_put_cstring(&m, responses[0]); |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 853 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 854 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 855 | mm_request_receive_expect(pmonitor->m_recvfd, |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 856 | MONITOR_ANS_SKEYRESPOND, &m); |
| 857 | |
| 858 | authok = buffer_get_int(&m); |
| 859 | buffer_free(&m); |
| 860 | |
| 861 | return ((authok == 0) ? -1 : 0); |
| 862 | } |
Darren Tucker | 042e2e8 | 2004-07-08 23:09:42 +1000 | [diff] [blame] | 863 | #endif /* SKEY */ |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 864 | |
| 865 | void |
| 866 | mm_ssh1_session_id(u_char session_id[16]) |
| 867 | { |
| 868 | Buffer m; |
| 869 | int i; |
| 870 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 871 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 872 | |
| 873 | buffer_init(&m); |
| 874 | for (i = 0; i < 16; i++) |
| 875 | buffer_put_char(&m, session_id[i]); |
| 876 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 877 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 878 | buffer_free(&m); |
| 879 | } |
| 880 | |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 881 | #ifdef WITH_SSH1 |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 882 | int |
| 883 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) |
| 884 | { |
| 885 | Buffer m; |
| 886 | Key *key; |
| 887 | u_char *blob; |
| 888 | u_int blen; |
Damien Miller | 06ebedf | 2003-02-24 12:03:38 +1100 | [diff] [blame] | 889 | int allowed = 0, have_forced = 0; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 890 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 891 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 892 | |
| 893 | buffer_init(&m); |
| 894 | buffer_put_bignum2(&m, client_n); |
| 895 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 896 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
| 897 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 898 | |
| 899 | allowed = buffer_get_int(&m); |
| 900 | |
Damien Miller | 06ebedf | 2003-02-24 12:03:38 +1100 | [diff] [blame] | 901 | /* fake forced command */ |
| 902 | auth_clear_options(); |
| 903 | have_forced = buffer_get_int(&m); |
| 904 | forced_command = have_forced ? xstrdup("true") : NULL; |
| 905 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 906 | if (allowed && rkey != NULL) { |
| 907 | blob = buffer_get_string(&m, &blen); |
| 908 | if ((key = key_from_blob(blob, blen)) == NULL) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 909 | fatal("%s: key_from_blob failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 910 | *rkey = key; |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 911 | free(blob); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 912 | } |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 913 | buffer_free(&m); |
| 914 | |
| 915 | return (allowed); |
| 916 | } |
| 917 | |
| 918 | BIGNUM * |
| 919 | mm_auth_rsa_generate_challenge(Key *key) |
| 920 | { |
| 921 | Buffer m; |
| 922 | BIGNUM *challenge; |
| 923 | u_char *blob; |
| 924 | u_int blen; |
| 925 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 926 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 927 | |
| 928 | if ((challenge = BN_new()) == NULL) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 929 | fatal("%s: BN_new failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 930 | |
| 931 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ |
| 932 | if (key_to_blob(key, &blob, &blen) == 0) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 933 | fatal("%s: key_to_blob failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 934 | key->type = KEY_RSA1; |
| 935 | |
| 936 | buffer_init(&m); |
| 937 | buffer_put_string(&m, blob, blen); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 938 | free(blob); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 939 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 940 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
| 941 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 942 | |
| 943 | buffer_get_bignum2(&m, challenge); |
| 944 | buffer_free(&m); |
| 945 | |
| 946 | return (challenge); |
| 947 | } |
| 948 | |
| 949 | int |
| 950 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) |
| 951 | { |
| 952 | Buffer m; |
| 953 | u_char *blob; |
| 954 | u_int blen; |
| 955 | int success = 0; |
| 956 | |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 957 | debug3("%s entering", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 958 | |
| 959 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ |
| 960 | if (key_to_blob(key, &blob, &blen) == 0) |
Ben Lindstrom | 7d9c38f | 2002-06-06 21:40:51 +0000 | [diff] [blame] | 961 | fatal("%s: key_to_blob failed", __func__); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 962 | key->type = KEY_RSA1; |
| 963 | |
| 964 | buffer_init(&m); |
| 965 | buffer_put_string(&m, blob, blen); |
| 966 | buffer_put_string(&m, response, 16); |
Darren Tucker | a627d42 | 2013-06-02 07:31:17 +1000 | [diff] [blame] | 967 | free(blob); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 968 | |
Ben Lindstrom | 7339b2a | 2002-05-15 16:25:01 +0000 | [diff] [blame] | 969 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
| 970 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 971 | |
| 972 | success = buffer_get_int(&m); |
| 973 | buffer_free(&m); |
| 974 | |
| 975 | return (success); |
| 976 | } |
Damien Miller | 1f0311c | 2014-05-15 14:24:09 +1000 | [diff] [blame] | 977 | #endif |
Damien Miller | 25162f2 | 2002-09-12 09:47:29 +1000 | [diff] [blame] | 978 | |
Darren Tucker | 2e0cf0d | 2005-02-08 21:52:47 +1100 | [diff] [blame] | 979 | #ifdef SSH_AUDIT_EVENTS |
Darren Tucker | 269a1ea | 2005-02-03 00:20:53 +1100 | [diff] [blame] | 980 | void |
| 981 | mm_audit_event(ssh_audit_event_t event) |
| 982 | { |
| 983 | Buffer m; |
| 984 | |
| 985 | debug3("%s entering", __func__); |
| 986 | |
| 987 | buffer_init(&m); |
| 988 | buffer_put_int(&m, event); |
| 989 | |
| 990 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); |
| 991 | buffer_free(&m); |
| 992 | } |
| 993 | |
| 994 | void |
| 995 | mm_audit_run_command(const char *command) |
| 996 | { |
| 997 | Buffer m; |
| 998 | |
| 999 | debug3("%s entering command %s", __func__, command); |
| 1000 | |
| 1001 | buffer_init(&m); |
| 1002 | buffer_put_cstring(&m, command); |
| 1003 | |
| 1004 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); |
| 1005 | buffer_free(&m); |
| 1006 | } |
Darren Tucker | 2e0cf0d | 2005-02-08 21:52:47 +1100 | [diff] [blame] | 1007 | #endif /* SSH_AUDIT_EVENTS */ |
Darren Tucker | 269a1ea | 2005-02-03 00:20:53 +1100 | [diff] [blame] | 1008 | |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 1009 | #ifdef GSSAPI |
| 1010 | OM_uint32 |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 1011 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 1012 | { |
| 1013 | Buffer m; |
| 1014 | OM_uint32 major; |
| 1015 | |
| 1016 | /* Client doesn't get to see the context */ |
| 1017 | *ctx = NULL; |
| 1018 | |
| 1019 | buffer_init(&m); |
Darren Tucker | 3f9fdc7 | 2004-06-22 12:56:01 +1000 | [diff] [blame] | 1020 | buffer_put_string(&m, goid->elements, goid->length); |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 1021 | |
| 1022 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); |
| 1023 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); |
| 1024 | |
| 1025 | major = buffer_get_int(&m); |
| 1026 | |
| 1027 | buffer_free(&m); |
| 1028 | return (major); |
| 1029 | } |
| 1030 | |
| 1031 | OM_uint32 |
| 1032 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, |
| 1033 | gss_buffer_desc *out, OM_uint32 *flags) |
| 1034 | { |
| 1035 | Buffer m; |
| 1036 | OM_uint32 major; |
Darren Tucker | 600ad8d | 2003-08-26 12:10:48 +1000 | [diff] [blame] | 1037 | u_int len; |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 1038 | |
| 1039 | buffer_init(&m); |
| 1040 | buffer_put_string(&m, in->value, in->length); |
| 1041 | |
| 1042 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); |
| 1043 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); |
| 1044 | |
| 1045 | major = buffer_get_int(&m); |
Darren Tucker | 600ad8d | 2003-08-26 12:10:48 +1000 | [diff] [blame] | 1046 | out->value = buffer_get_string(&m, &len); |
| 1047 | out->length = len; |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 1048 | if (flags) |
| 1049 | *flags = buffer_get_int(&m); |
| 1050 | |
| 1051 | buffer_free(&m); |
| 1052 | |
| 1053 | return (major); |
| 1054 | } |
| 1055 | |
Damien Miller | 0425d40 | 2003-11-17 22:18:21 +1100 | [diff] [blame] | 1056 | OM_uint32 |
| 1057 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) |
| 1058 | { |
| 1059 | Buffer m; |
| 1060 | OM_uint32 major; |
| 1061 | |
| 1062 | buffer_init(&m); |
| 1063 | buffer_put_string(&m, gssbuf->value, gssbuf->length); |
| 1064 | buffer_put_string(&m, gssmic->value, gssmic->length); |
| 1065 | |
| 1066 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); |
| 1067 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, |
| 1068 | &m); |
| 1069 | |
| 1070 | major = buffer_get_int(&m); |
| 1071 | buffer_free(&m); |
| 1072 | return(major); |
| 1073 | } |
| 1074 | |
Darren Tucker | 0efd155 | 2003-08-26 11:49:55 +1000 | [diff] [blame] | 1075 | int |
| 1076 | mm_ssh_gssapi_userok(char *user) |
| 1077 | { |
| 1078 | Buffer m; |
| 1079 | int authenticated = 0; |
| 1080 | |
| 1081 | buffer_init(&m); |
| 1082 | |
| 1083 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); |
| 1084 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, |
| 1085 | &m); |
| 1086 | |
| 1087 | authenticated = buffer_get_int(&m); |
| 1088 | |
| 1089 | buffer_free(&m); |
| 1090 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); |
| 1091 | return (authenticated); |
| 1092 | } |
| 1093 | #endif /* GSSAPI */ |
Damien Miller | 01ed227 | 2008-11-05 16:20:46 +1100 | [diff] [blame] | 1094 | |