Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 1 | /* $OpenBSD: authfd.c,v 1.84 2010/08/31 11:54:45 djm Exp $ */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 6 | * Functions for connecting the local authentication agent. |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 7 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 8 | * As far as I am concerned, the code I have written for this software |
| 9 | * can be used freely for any purpose. Any derived versions of this |
| 10 | * software must be clearly marked as such, and if the derived work is |
| 11 | * incompatible with the protocol description in the RFC file, it must be |
| 12 | * called by a name other than "ssh" or "Secure Shell". |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 13 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 14 | * SSH2 implementation, |
| 15 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 16 | * |
| 17 | * Redistribution and use in source and binary forms, with or without |
| 18 | * modification, are permitted provided that the following conditions |
| 19 | * are met: |
| 20 | * 1. Redistributions of source code must retain the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer. |
| 22 | * 2. Redistributions in binary form must reproduce the above copyright |
| 23 | * notice, this list of conditions and the following disclaimer in the |
| 24 | * documentation and/or other materials provided with the distribution. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 27 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 28 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 29 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 30 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 31 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 32 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 33 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 35 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 36 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 37 | |
| 38 | #include "includes.h" |
Damien Miller | 574c41f | 2006-03-15 11:40:10 +1100 | [diff] [blame] | 39 | |
| 40 | #include <sys/types.h> |
| 41 | #include <sys/un.h> |
Damien Miller | e3b60b5 | 2006-07-10 21:08:03 +1000 | [diff] [blame] | 42 | #include <sys/socket.h> |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 43 | |
| 44 | #include <openssl/evp.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 45 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 46 | #include <openssl/crypto.h> |
Damien Miller | 57cf638 | 2006-07-10 21:13:46 +1000 | [diff] [blame] | 47 | #include <fcntl.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 48 | #include <stdlib.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 49 | #include <signal.h> |
Damien Miller | ded319c | 2006-09-01 15:38:36 +1000 | [diff] [blame] | 50 | #include <stdarg.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 51 | #include <string.h> |
Damien Miller | e6b3b61 | 2006-07-24 14:01:23 +1000 | [diff] [blame] | 52 | #include <unistd.h> |
Damien Miller | 57cf638 | 2006-07-10 21:13:46 +1000 | [diff] [blame] | 53 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 54 | #include "xmalloc.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 55 | #include "ssh.h" |
| 56 | #include "rsa.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 57 | #include "buffer.h" |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 58 | #include "key.h" |
| 59 | #include "authfd.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 60 | #include "cipher.h" |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 61 | #include "kex.h" |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 62 | #include "compat.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 63 | #include "log.h" |
| 64 | #include "atomicio.h" |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 65 | #include "misc.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 66 | |
Damien Miller | 789e95d | 2002-09-12 09:52:46 +1000 | [diff] [blame] | 67 | static int agent_present = 0; |
| 68 | |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 69 | /* helper */ |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 70 | int decode_reply(int type); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 71 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 72 | /* macro to check for "agent failure" message */ |
| 73 | #define agent_failed(x) \ |
Ben Lindstrom | c9a2636 | 2001-08-15 23:04:50 +0000 | [diff] [blame] | 74 | ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ |
Ben Lindstrom | cb72e4f | 2002-06-21 00:41:51 +0000 | [diff] [blame] | 75 | (x == SSH2_AGENT_FAILURE)) |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 76 | |
Damien Miller | 789e95d | 2002-09-12 09:52:46 +1000 | [diff] [blame] | 77 | int |
| 78 | ssh_agent_present(void) |
| 79 | { |
| 80 | int authfd; |
| 81 | |
| 82 | if (agent_present) |
| 83 | return 1; |
| 84 | if ((authfd = ssh_get_authentication_socket()) == -1) |
| 85 | return 0; |
| 86 | else { |
| 87 | ssh_close_authentication_socket(authfd); |
| 88 | return 1; |
| 89 | } |
| 90 | } |
| 91 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 92 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
| 93 | |
| 94 | int |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 95 | ssh_get_authentication_socket(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 96 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 97 | const char *authsocket; |
Ben Lindstrom | b1d822c | 2001-09-20 01:03:31 +0000 | [diff] [blame] | 98 | int sock; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 99 | struct sockaddr_un sunaddr; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 100 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 101 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); |
| 102 | if (!authsocket) |
| 103 | return -1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 104 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 105 | sunaddr.sun_family = AF_UNIX; |
| 106 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); |
Damien Miller | 10f6f6b | 1999-11-17 17:29:08 +1100 | [diff] [blame] | 107 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 108 | sock = socket(AF_UNIX, SOCK_STREAM, 0); |
| 109 | if (sock < 0) |
| 110 | return -1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 111 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 112 | /* close on exec */ |
| 113 | if (fcntl(sock, F_SETFD, 1) == -1) { |
| 114 | close(sock); |
| 115 | return -1; |
| 116 | } |
Damien Miller | d62f2ca | 2006-03-26 13:57:41 +1100 | [diff] [blame] | 117 | if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 118 | close(sock); |
| 119 | return -1; |
| 120 | } |
Damien Miller | 789e95d | 2002-09-12 09:52:46 +1000 | [diff] [blame] | 121 | agent_present = 1; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 122 | return sock; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 123 | } |
| 124 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 125 | static int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 126 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 127 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 128 | u_int l, len; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 129 | char buf[1024]; |
| 130 | |
| 131 | /* Get the length of the message, and format it in the buffer. */ |
| 132 | len = buffer_len(request); |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 133 | put_u32(buf, len); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 134 | |
| 135 | /* Send the length and then the packet to the agent. */ |
Darren Tucker | 9f63f22 | 2003-07-03 13:46:56 +1000 | [diff] [blame] | 136 | if (atomicio(vwrite, auth->fd, buf, 4) != 4 || |
| 137 | atomicio(vwrite, auth->fd, buffer_ptr(request), |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 138 | buffer_len(request)) != buffer_len(request)) { |
| 139 | error("Error writing to authentication socket."); |
| 140 | return 0; |
| 141 | } |
| 142 | /* |
| 143 | * Wait for response from the agent. First read the length of the |
| 144 | * response packet. |
| 145 | */ |
Darren Tucker | fe6649d | 2004-08-13 21:19:37 +1000 | [diff] [blame] | 146 | if (atomicio(read, auth->fd, buf, 4) != 4) { |
| 147 | error("Error reading response length from authentication socket."); |
| 148 | return 0; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | /* Extract the length, and check it for sanity. */ |
Damien Miller | 3f94188 | 2006-03-31 23:13:02 +1100 | [diff] [blame] | 152 | len = get_u32(buf); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 153 | if (len > 256 * 1024) |
Darren Tucker | c0815c9 | 2003-09-22 21:05:50 +1000 | [diff] [blame] | 154 | fatal("Authentication response too long: %u", len); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 155 | |
| 156 | /* Read the rest of the response in to the buffer. */ |
| 157 | buffer_clear(reply); |
| 158 | while (len > 0) { |
| 159 | l = len; |
| 160 | if (l > sizeof(buf)) |
| 161 | l = sizeof(buf); |
Damien Miller | b253cc4 | 2005-05-26 12:23:44 +1000 | [diff] [blame] | 162 | if (atomicio(read, auth->fd, buf, l) != l) { |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 163 | error("Error reading response from authentication socket."); |
| 164 | return 0; |
| 165 | } |
Ben Lindstrom | 6398a0e | 2002-06-25 23:22:54 +0000 | [diff] [blame] | 166 | buffer_append(reply, buf, l); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 167 | len -= l; |
| 168 | } |
| 169 | return 1; |
| 170 | } |
| 171 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 172 | /* |
| 173 | * Closes the agent socket if it should be closed (depends on how it was |
| 174 | * obtained). The argument must have been returned by |
| 175 | * ssh_get_authentication_socket(). |
| 176 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 177 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 178 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 179 | ssh_close_authentication_socket(int sock) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 180 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 181 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
| 182 | close(sock); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 183 | } |
| 184 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 185 | /* |
| 186 | * Opens and connects a private socket for communication with the |
| 187 | * authentication agent. Returns the file descriptor (which must be |
| 188 | * shut down and closed by the caller when no longer needed). |
| 189 | * Returns NULL if an error occurred and the connection could not be |
| 190 | * opened. |
| 191 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 192 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 193 | AuthenticationConnection * |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 194 | ssh_get_authentication_connection(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 195 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 196 | AuthenticationConnection *auth; |
| 197 | int sock; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 198 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 199 | sock = ssh_get_authentication_socket(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 200 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 201 | /* |
| 202 | * Fail if we couldn't obtain a connection. This happens if we |
| 203 | * exited due to a timeout. |
| 204 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 205 | if (sock < 0) |
| 206 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 207 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 208 | auth = xmalloc(sizeof(*auth)); |
| 209 | auth->fd = sock; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 210 | buffer_init(&auth->identities); |
| 211 | auth->howmany = 0; |
| 212 | |
| 213 | return auth; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 214 | } |
| 215 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 216 | /* |
| 217 | * Closes the connection to the authentication agent and frees any associated |
| 218 | * memory. |
| 219 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 220 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 221 | void |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 222 | ssh_close_authentication_connection(AuthenticationConnection *auth) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 223 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 224 | buffer_free(&auth->identities); |
| 225 | close(auth->fd); |
| 226 | xfree(auth); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 227 | } |
| 228 | |
Ben Lindstrom | 2f71704 | 2002-06-06 21:52:03 +0000 | [diff] [blame] | 229 | /* Lock/unlock agent */ |
| 230 | int |
| 231 | ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password) |
| 232 | { |
| 233 | int type; |
| 234 | Buffer msg; |
| 235 | |
| 236 | buffer_init(&msg); |
| 237 | buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK); |
| 238 | buffer_put_cstring(&msg, password); |
| 239 | |
| 240 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 241 | buffer_free(&msg); |
| 242 | return 0; |
| 243 | } |
| 244 | type = buffer_get_char(&msg); |
| 245 | buffer_free(&msg); |
| 246 | return decode_reply(type); |
| 247 | } |
| 248 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 249 | /* |
| 250 | * Returns the first authentication identity held by the agent. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 251 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 252 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 253 | int |
| 254 | ssh_get_num_identities(AuthenticationConnection *auth, int version) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 255 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 256 | int type, code1 = 0, code2 = 0; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 257 | Buffer request; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 258 | |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 259 | switch (version) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 260 | case 1: |
| 261 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; |
| 262 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; |
| 263 | break; |
| 264 | case 2: |
| 265 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; |
| 266 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; |
| 267 | break; |
| 268 | default: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 269 | return 0; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 270 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 271 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 272 | /* |
| 273 | * Send a message to the agent requesting for a list of the |
| 274 | * identities it can represent. |
| 275 | */ |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 276 | buffer_init(&request); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 277 | buffer_put_char(&request, code1); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 278 | |
| 279 | buffer_clear(&auth->identities); |
| 280 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { |
| 281 | buffer_free(&request); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 282 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 283 | } |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 284 | buffer_free(&request); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 285 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 286 | /* Get message type, and verify that we got a proper answer. */ |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 287 | type = buffer_get_char(&auth->identities); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 288 | if (agent_failed(type)) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 289 | return 0; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 290 | } else if (type != code2) { |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 291 | fatal("Bad authentication reply message type: %d", type); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 292 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 293 | |
| 294 | /* Get the number of entries in the response and check it for sanity. */ |
| 295 | auth->howmany = buffer_get_int(&auth->identities); |
Darren Tucker | c0815c9 | 2003-09-22 21:05:50 +1000 | [diff] [blame] | 296 | if ((u_int)auth->howmany > 1024) |
Ben Lindstrom | 6df8ef4 | 2001-03-05 07:47:23 +0000 | [diff] [blame] | 297 | fatal("Too many identities in authentication reply: %d", |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 298 | auth->howmany); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 299 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 300 | return auth->howmany; |
| 301 | } |
| 302 | |
| 303 | Key * |
| 304 | ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) |
| 305 | { |
| 306 | /* get number of identities and return the first entry (if any). */ |
| 307 | if (ssh_get_num_identities(auth, version) > 0) |
| 308 | return ssh_get_next_identity(auth, comment, version); |
| 309 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 310 | } |
| 311 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 312 | Key * |
| 313 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 314 | { |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 315 | int keybits; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 316 | u_int bits; |
| 317 | u_char *blob; |
| 318 | u_int blen; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 319 | Key *key = NULL; |
Damien Miller | 7e8e820 | 1999-11-16 13:37:16 +1100 | [diff] [blame] | 320 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 321 | /* Return failure if no more entries. */ |
| 322 | if (auth->howmany <= 0) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 323 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 324 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 325 | /* |
| 326 | * Get the next entry from the packet. These will abort with a fatal |
| 327 | * error if the packet is too short or contains corrupt data. |
| 328 | */ |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 329 | switch (version) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 330 | case 1: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 331 | key = key_new(KEY_RSA1); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 332 | bits = buffer_get_int(&auth->identities); |
| 333 | buffer_get_bignum(&auth->identities, key->rsa->e); |
| 334 | buffer_get_bignum(&auth->identities, key->rsa->n); |
| 335 | *comment = buffer_get_string(&auth->identities, NULL); |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 336 | keybits = BN_num_bits(key->rsa->n); |
| 337 | if (keybits < 0 || bits != (u_int)keybits) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 338 | logit("Warning: identity keysize mismatch: actual %d, announced %u", |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 339 | BN_num_bits(key->rsa->n), bits); |
| 340 | break; |
| 341 | case 2: |
| 342 | blob = buffer_get_string(&auth->identities, &blen); |
| 343 | *comment = buffer_get_string(&auth->identities, NULL); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 344 | key = key_from_blob(blob, blen); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 345 | xfree(blob); |
| 346 | break; |
| 347 | default: |
| 348 | return NULL; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 349 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 350 | /* Decrement the number of remaining entries. */ |
| 351 | auth->howmany--; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 352 | return key; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 353 | } |
| 354 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 355 | /* |
| 356 | * Generates a random challenge, sends it to the agent, and waits for |
| 357 | * response from the agent. Returns true (non-zero) if the agent gave the |
| 358 | * correct answer, zero otherwise. Response type selects the style of |
| 359 | * response desired, with 0 corresponding to protocol version 1.0 (no longer |
| 360 | * supported) and 1 corresponding to protocol version 1.1. |
| 361 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 362 | |
| 363 | int |
| 364 | ssh_decrypt_challenge(AuthenticationConnection *auth, |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 365 | Key* key, BIGNUM *challenge, |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 366 | u_char session_id[16], |
| 367 | u_int response_type, |
| 368 | u_char response[16]) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 369 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 370 | Buffer buffer; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 371 | int success = 0; |
| 372 | int i; |
| 373 | int type; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 374 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 375 | if (key->type != KEY_RSA1) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 376 | return 0; |
| 377 | if (response_type == 0) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 378 | logit("Compatibility with ssh protocol version 1.0 no longer supported."); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 379 | return 0; |
| 380 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 381 | buffer_init(&buffer); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 382 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 383 | buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); |
| 384 | buffer_put_bignum(&buffer, key->rsa->e); |
| 385 | buffer_put_bignum(&buffer, key->rsa->n); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 386 | buffer_put_bignum(&buffer, challenge); |
Damien Miller | 4a8ed54 | 2002-01-22 23:33:31 +1100 | [diff] [blame] | 387 | buffer_append(&buffer, session_id, 16); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 388 | buffer_put_int(&buffer, response_type); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 389 | |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 390 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 391 | buffer_free(&buffer); |
| 392 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 393 | } |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 394 | type = buffer_get_char(&buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 395 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 396 | if (agent_failed(type)) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 397 | logit("Agent admitted failure to authenticate using the key."); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 398 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
| 399 | fatal("Bad authentication response: %d", type); |
| 400 | } else { |
| 401 | success = 1; |
| 402 | /* |
| 403 | * Get the response from the packet. This will abort with a |
| 404 | * fatal error if the packet is corrupt. |
| 405 | */ |
| 406 | for (i = 0; i < 16; i++) |
Damien Miller | 8ba29fe | 2006-03-26 14:25:19 +1100 | [diff] [blame] | 407 | response[i] = (u_char)buffer_get_char(&buffer); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 408 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 409 | buffer_free(&buffer); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 410 | return success; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 411 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 412 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 413 | /* ask agent to sign data, returns -1 on error, 0 on success */ |
| 414 | int |
| 415 | ssh_agent_sign(AuthenticationConnection *auth, |
| 416 | Key *key, |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 417 | u_char **sigp, u_int *lenp, |
| 418 | u_char *data, u_int datalen) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 419 | { |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 420 | extern int datafellows; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 421 | Buffer msg; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 422 | u_char *blob; |
| 423 | u_int blen; |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 424 | int type, flags = 0; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 425 | int ret = -1; |
| 426 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 427 | if (key_to_blob(key, &blob, &blen) == 0) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 428 | return -1; |
| 429 | |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 430 | if (datafellows & SSH_BUG_SIGBLOB) |
| 431 | flags = SSH_AGENT_OLD_SIGNATURE; |
| 432 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 433 | buffer_init(&msg); |
| 434 | buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); |
| 435 | buffer_put_string(&msg, blob, blen); |
| 436 | buffer_put_string(&msg, data, datalen); |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 437 | buffer_put_int(&msg, flags); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 438 | xfree(blob); |
| 439 | |
| 440 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 441 | buffer_free(&msg); |
| 442 | return -1; |
| 443 | } |
| 444 | type = buffer_get_char(&msg); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 445 | if (agent_failed(type)) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 446 | logit("Agent admitted failure to sign using the key."); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 447 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { |
| 448 | fatal("Bad authentication response: %d", type); |
| 449 | } else { |
| 450 | ret = 0; |
| 451 | *sigp = buffer_get_string(&msg, lenp); |
| 452 | } |
| 453 | buffer_free(&msg); |
| 454 | return ret; |
| 455 | } |
| 456 | |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 457 | /* Encode key for a message to the agent. */ |
| 458 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 459 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 460 | ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 461 | { |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 462 | buffer_put_int(b, BN_num_bits(key->n)); |
| 463 | buffer_put_bignum(b, key->n); |
| 464 | buffer_put_bignum(b, key->e); |
| 465 | buffer_put_bignum(b, key->d); |
| 466 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ |
| 467 | buffer_put_bignum(b, key->iqmp); /* ssh key->u */ |
| 468 | buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ |
| 469 | buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ |
Ben Lindstrom | 664408d | 2001-06-09 01:42:01 +0000 | [diff] [blame] | 470 | buffer_put_cstring(b, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 471 | } |
| 472 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 473 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 474 | ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 475 | { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 476 | buffer_put_cstring(b, key_ssh_name(key)); |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 477 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 478 | case KEY_RSA: |
| 479 | buffer_put_bignum2(b, key->rsa->n); |
| 480 | buffer_put_bignum2(b, key->rsa->e); |
| 481 | buffer_put_bignum2(b, key->rsa->d); |
| 482 | buffer_put_bignum2(b, key->rsa->iqmp); |
| 483 | buffer_put_bignum2(b, key->rsa->p); |
| 484 | buffer_put_bignum2(b, key->rsa->q); |
| 485 | break; |
Damien Miller | 4e270b0 | 2010-04-16 15:56:21 +1000 | [diff] [blame] | 486 | case KEY_RSA_CERT_V00: |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 487 | case KEY_RSA_CERT: |
| 488 | if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0) |
| 489 | fatal("%s: no cert/certblob", __func__); |
| 490 | buffer_put_string(b, buffer_ptr(&key->cert->certblob), |
| 491 | buffer_len(&key->cert->certblob)); |
| 492 | buffer_put_bignum2(b, key->rsa->d); |
| 493 | buffer_put_bignum2(b, key->rsa->iqmp); |
| 494 | buffer_put_bignum2(b, key->rsa->p); |
| 495 | buffer_put_bignum2(b, key->rsa->q); |
| 496 | break; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 497 | case KEY_DSA: |
| 498 | buffer_put_bignum2(b, key->dsa->p); |
| 499 | buffer_put_bignum2(b, key->dsa->q); |
| 500 | buffer_put_bignum2(b, key->dsa->g); |
| 501 | buffer_put_bignum2(b, key->dsa->pub_key); |
| 502 | buffer_put_bignum2(b, key->dsa->priv_key); |
| 503 | break; |
Damien Miller | 4e270b0 | 2010-04-16 15:56:21 +1000 | [diff] [blame] | 504 | case KEY_DSA_CERT_V00: |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 505 | case KEY_DSA_CERT: |
| 506 | if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0) |
| 507 | fatal("%s: no cert/certblob", __func__); |
| 508 | buffer_put_string(b, buffer_ptr(&key->cert->certblob), |
| 509 | buffer_len(&key->cert->certblob)); |
| 510 | buffer_put_bignum2(b, key->dsa->priv_key); |
| 511 | break; |
Damien Miller | 6af914a | 2010-09-10 11:39:26 +1000 | [diff] [blame^] | 512 | #ifdef OPENSSL_HAS_ECC |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 513 | case KEY_ECDSA: |
| 514 | buffer_put_cstring(b, key_curve_nid_to_name(key->ecdsa_nid)); |
| 515 | buffer_put_ecpoint(b, EC_KEY_get0_group(key->ecdsa), |
| 516 | EC_KEY_get0_public_key(key->ecdsa)); |
| 517 | buffer_put_bignum2(b, EC_KEY_get0_private_key(key->ecdsa)); |
| 518 | break; |
| 519 | case KEY_ECDSA_CERT: |
| 520 | if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0) |
| 521 | fatal("%s: no cert/certblob", __func__); |
| 522 | buffer_put_string(b, buffer_ptr(&key->cert->certblob), |
| 523 | buffer_len(&key->cert->certblob)); |
| 524 | buffer_put_bignum2(b, EC_KEY_get0_private_key(key->ecdsa)); |
| 525 | break; |
Damien Miller | 6af914a | 2010-09-10 11:39:26 +1000 | [diff] [blame^] | 526 | #endif |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 527 | } |
| 528 | buffer_put_cstring(b, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 529 | } |
| 530 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 531 | /* |
| 532 | * Adds an identity to the authentication server. This call is not meant to |
| 533 | * be used by normal applications. |
| 534 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 535 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 536 | int |
Ben Lindstrom | 2b266b7 | 2002-06-21 00:08:39 +0000 | [diff] [blame] | 537 | ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key, |
Damien Miller | 6c71179 | 2003-01-24 11:36:23 +1100 | [diff] [blame] | 538 | const char *comment, u_int life, u_int confirm) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 539 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 540 | Buffer msg; |
Damien Miller | 6c71179 | 2003-01-24 11:36:23 +1100 | [diff] [blame] | 541 | int type, constrained = (life || confirm); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 542 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 543 | buffer_init(&msg); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 544 | |
| 545 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 546 | case KEY_RSA1: |
Ben Lindstrom | 2b266b7 | 2002-06-21 00:08:39 +0000 | [diff] [blame] | 547 | type = constrained ? |
| 548 | SSH_AGENTC_ADD_RSA_ID_CONSTRAINED : |
| 549 | SSH_AGENTC_ADD_RSA_IDENTITY; |
| 550 | buffer_put_char(&msg, type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 551 | ssh_encode_identity_rsa1(&msg, key->rsa, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 552 | break; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 553 | case KEY_RSA: |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 554 | case KEY_RSA_CERT: |
Damien Miller | 4e270b0 | 2010-04-16 15:56:21 +1000 | [diff] [blame] | 555 | case KEY_RSA_CERT_V00: |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 556 | case KEY_DSA: |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 557 | case KEY_DSA_CERT: |
Damien Miller | 4e270b0 | 2010-04-16 15:56:21 +1000 | [diff] [blame] | 558 | case KEY_DSA_CERT_V00: |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 559 | case KEY_ECDSA: |
| 560 | case KEY_ECDSA_CERT: |
Ben Lindstrom | 2b266b7 | 2002-06-21 00:08:39 +0000 | [diff] [blame] | 561 | type = constrained ? |
| 562 | SSH2_AGENTC_ADD_ID_CONSTRAINED : |
| 563 | SSH2_AGENTC_ADD_IDENTITY; |
| 564 | buffer_put_char(&msg, type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 565 | ssh_encode_identity_ssh2(&msg, key, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 566 | break; |
| 567 | default: |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 568 | buffer_free(&msg); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 569 | return 0; |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 570 | } |
Ben Lindstrom | 2b266b7 | 2002-06-21 00:08:39 +0000 | [diff] [blame] | 571 | if (constrained) { |
| 572 | if (life != 0) { |
| 573 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); |
| 574 | buffer_put_int(&msg, life); |
| 575 | } |
Damien Miller | 6c71179 | 2003-01-24 11:36:23 +1100 | [diff] [blame] | 576 | if (confirm != 0) |
| 577 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); |
Ben Lindstrom | 2b266b7 | 2002-06-21 00:08:39 +0000 | [diff] [blame] | 578 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 579 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 580 | buffer_free(&msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 581 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 582 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 583 | type = buffer_get_char(&msg); |
| 584 | buffer_free(&msg); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 585 | return decode_reply(type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 586 | } |
| 587 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 588 | /* |
| 589 | * Removes an identity from the authentication server. This call is not |
| 590 | * meant to be used by normal applications. |
| 591 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 592 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 593 | int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 594 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 595 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 596 | Buffer msg; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 597 | int type; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 598 | u_char *blob; |
| 599 | u_int blen; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 600 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 601 | buffer_init(&msg); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 602 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 603 | if (key->type == KEY_RSA1) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 604 | buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); |
| 605 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); |
| 606 | buffer_put_bignum(&msg, key->rsa->e); |
| 607 | buffer_put_bignum(&msg, key->rsa->n); |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame] | 608 | } else if (key_type_plain(key->type) == KEY_DSA || |
Damien Miller | eb8b60e | 2010-08-31 22:41:14 +1000 | [diff] [blame] | 609 | key_type_plain(key->type) == KEY_RSA || |
| 610 | key_type_plain(key->type) == KEY_ECDSA) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 611 | key_to_blob(key, &blob, &blen); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 612 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); |
| 613 | buffer_put_string(&msg, blob, blen); |
| 614 | xfree(blob); |
| 615 | } else { |
| 616 | buffer_free(&msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 617 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 618 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 619 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 620 | buffer_free(&msg); |
| 621 | return 0; |
| 622 | } |
| 623 | type = buffer_get_char(&msg); |
| 624 | buffer_free(&msg); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 625 | return decode_reply(type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 626 | } |
| 627 | |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 628 | int |
Damien Miller | a8e06ce | 2003-11-21 23:48:55 +1100 | [diff] [blame] | 629 | ssh_update_card(AuthenticationConnection *auth, int add, |
Damien Miller | d94f20d | 2003-06-11 22:06:33 +1000 | [diff] [blame] | 630 | const char *reader_id, const char *pin, u_int life, u_int confirm) |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 631 | { |
| 632 | Buffer msg; |
Damien Miller | d94f20d | 2003-06-11 22:06:33 +1000 | [diff] [blame] | 633 | int type, constrained = (life || confirm); |
| 634 | |
| 635 | if (add) { |
| 636 | type = constrained ? |
| 637 | SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED : |
| 638 | SSH_AGENTC_ADD_SMARTCARD_KEY; |
| 639 | } else |
| 640 | type = SSH_AGENTC_REMOVE_SMARTCARD_KEY; |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 641 | |
| 642 | buffer_init(&msg); |
Damien Miller | d94f20d | 2003-06-11 22:06:33 +1000 | [diff] [blame] | 643 | buffer_put_char(&msg, type); |
Ben Lindstrom | f7db3bb | 2001-08-06 21:35:51 +0000 | [diff] [blame] | 644 | buffer_put_cstring(&msg, reader_id); |
Ben Lindstrom | ba72d30 | 2002-03-22 03:51:06 +0000 | [diff] [blame] | 645 | buffer_put_cstring(&msg, pin); |
Damien Miller | 787b2ec | 2003-11-21 23:56:47 +1100 | [diff] [blame] | 646 | |
Damien Miller | d94f20d | 2003-06-11 22:06:33 +1000 | [diff] [blame] | 647 | if (constrained) { |
| 648 | if (life != 0) { |
| 649 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); |
| 650 | buffer_put_int(&msg, life); |
| 651 | } |
| 652 | if (confirm != 0) |
| 653 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); |
| 654 | } |
| 655 | |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 656 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 657 | buffer_free(&msg); |
| 658 | return 0; |
| 659 | } |
| 660 | type = buffer_get_char(&msg); |
| 661 | buffer_free(&msg); |
| 662 | return decode_reply(type); |
| 663 | } |
| 664 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 665 | /* |
| 666 | * Removes all identities from the agent. This call is not meant to be used |
| 667 | * by normal applications. |
| 668 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 669 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 670 | int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 671 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 672 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 673 | Buffer msg; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 674 | int type; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 675 | int code = (version==1) ? |
| 676 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : |
| 677 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 678 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 679 | buffer_init(&msg); |
| 680 | buffer_put_char(&msg, code); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 681 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 682 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 683 | buffer_free(&msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 684 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 685 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 686 | type = buffer_get_char(&msg); |
| 687 | buffer_free(&msg); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 688 | return decode_reply(type); |
| 689 | } |
| 690 | |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 691 | int |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 692 | decode_reply(int type) |
| 693 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 694 | switch (type) { |
| 695 | case SSH_AGENT_FAILURE: |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 696 | case SSH_COM_AGENT2_FAILURE: |
Ben Lindstrom | c9a2636 | 2001-08-15 23:04:50 +0000 | [diff] [blame] | 697 | case SSH2_AGENT_FAILURE: |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 698 | logit("SSH_AGENT_FAILURE"); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 699 | return 0; |
| 700 | case SSH_AGENT_SUCCESS: |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 701 | return 1; |
| 702 | default: |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 703 | fatal("Bad response from authentication agent: %d", type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 704 | } |
| 705 | /* NOTREACHED */ |
| 706 | return 0; |
| 707 | } |