Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 4 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 5 | * Functions for connecting the local authentication agent. |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 6 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 7 | * As far as I am concerned, the code I have written for this software |
| 8 | * can be used freely for any purpose. Any derived versions of this |
| 9 | * software must be clearly marked as such, and if the derived work is |
| 10 | * incompatible with the protocol description in the RFC file, it must be |
| 11 | * called by a name other than "ssh" or "Secure Shell". |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 12 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 13 | * SSH2 implementation, |
| 14 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 15 | * |
| 16 | * Redistribution and use in source and binary forms, with or without |
| 17 | * modification, are permitted provided that the following conditions |
| 18 | * are met: |
| 19 | * 1. Redistributions of source code must retain the above copyright |
| 20 | * notice, this list of conditions and the following disclaimer. |
| 21 | * 2. Redistributions in binary form must reproduce the above copyright |
| 22 | * notice, this list of conditions and the following disclaimer in the |
| 23 | * documentation and/or other materials provided with the distribution. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 26 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 27 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 28 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 29 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 30 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 34 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 35 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 36 | |
| 37 | #include "includes.h" |
Ben Lindstrom | c90f8a9 | 2002-06-21 00:06:54 +0000 | [diff] [blame^] | 38 | RCSID("$OpenBSD: authfd.c,v 1.53 2002/06/15 00:07:38 markus Exp $"); |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 39 | |
| 40 | #include <openssl/evp.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 41 | |
| 42 | #include "ssh.h" |
| 43 | #include "rsa.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 44 | #include "buffer.h" |
| 45 | #include "bufaux.h" |
| 46 | #include "xmalloc.h" |
| 47 | #include "getput.h" |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 48 | #include "key.h" |
| 49 | #include "authfd.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 50 | #include "cipher.h" |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 51 | #include "kex.h" |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 52 | #include "compat.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 53 | #include "log.h" |
| 54 | #include "atomicio.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 55 | |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 56 | /* helper */ |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 57 | int decode_reply(int type); |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 58 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 59 | /* macro to check for "agent failure" message */ |
| 60 | #define agent_failed(x) \ |
Ben Lindstrom | c9a2636 | 2001-08-15 23:04:50 +0000 | [diff] [blame] | 61 | ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ |
| 62 | (x == SSH2_AGENT_FAILURE)) |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 63 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 64 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
| 65 | |
| 66 | int |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 67 | ssh_get_authentication_socket(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 68 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 69 | const char *authsocket; |
Ben Lindstrom | b1d822c | 2001-09-20 01:03:31 +0000 | [diff] [blame] | 70 | int sock; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 71 | struct sockaddr_un sunaddr; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 72 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 73 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); |
| 74 | if (!authsocket) |
| 75 | return -1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 76 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 77 | sunaddr.sun_family = AF_UNIX; |
| 78 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); |
Damien Miller | 10f6f6b | 1999-11-17 17:29:08 +1100 | [diff] [blame] | 79 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 80 | sock = socket(AF_UNIX, SOCK_STREAM, 0); |
| 81 | if (sock < 0) |
| 82 | return -1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 83 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 84 | /* close on exec */ |
| 85 | if (fcntl(sock, F_SETFD, 1) == -1) { |
| 86 | close(sock); |
| 87 | return -1; |
| 88 | } |
Ben Lindstrom | b1d822c | 2001-09-20 01:03:31 +0000 | [diff] [blame] | 89 | if (connect(sock, (struct sockaddr *) &sunaddr, sizeof sunaddr) < 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 90 | close(sock); |
| 91 | return -1; |
| 92 | } |
| 93 | return sock; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 94 | } |
| 95 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 96 | static int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 97 | ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 98 | { |
| 99 | int l, len; |
| 100 | char buf[1024]; |
| 101 | |
| 102 | /* Get the length of the message, and format it in the buffer. */ |
| 103 | len = buffer_len(request); |
| 104 | PUT_32BIT(buf, len); |
| 105 | |
| 106 | /* Send the length and then the packet to the agent. */ |
| 107 | if (atomicio(write, auth->fd, buf, 4) != 4 || |
| 108 | atomicio(write, auth->fd, buffer_ptr(request), |
| 109 | buffer_len(request)) != buffer_len(request)) { |
| 110 | error("Error writing to authentication socket."); |
| 111 | return 0; |
| 112 | } |
| 113 | /* |
| 114 | * Wait for response from the agent. First read the length of the |
| 115 | * response packet. |
| 116 | */ |
| 117 | len = 4; |
| 118 | while (len > 0) { |
| 119 | l = read(auth->fd, buf + 4 - len, len); |
Ben Lindstrom | b3144e5 | 2001-03-06 03:31:34 +0000 | [diff] [blame] | 120 | if (l == -1 && (errno == EAGAIN || errno == EINTR)) |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 121 | continue; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 122 | if (l <= 0) { |
| 123 | error("Error reading response length from authentication socket."); |
| 124 | return 0; |
| 125 | } |
| 126 | len -= l; |
| 127 | } |
| 128 | |
| 129 | /* Extract the length, and check it for sanity. */ |
| 130 | len = GET_32BIT(buf); |
| 131 | if (len > 256 * 1024) |
| 132 | fatal("Authentication response too long: %d", len); |
| 133 | |
| 134 | /* Read the rest of the response in to the buffer. */ |
| 135 | buffer_clear(reply); |
| 136 | while (len > 0) { |
| 137 | l = len; |
| 138 | if (l > sizeof(buf)) |
| 139 | l = sizeof(buf); |
| 140 | l = read(auth->fd, buf, l); |
Ben Lindstrom | b3144e5 | 2001-03-06 03:31:34 +0000 | [diff] [blame] | 141 | if (l == -1 && (errno == EAGAIN || errno == EINTR)) |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 142 | continue; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 143 | if (l <= 0) { |
| 144 | error("Error reading response from authentication socket."); |
| 145 | return 0; |
| 146 | } |
| 147 | buffer_append(reply, (char *) buf, l); |
| 148 | len -= l; |
| 149 | } |
| 150 | return 1; |
| 151 | } |
| 152 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 153 | /* |
| 154 | * Closes the agent socket if it should be closed (depends on how it was |
| 155 | * obtained). The argument must have been returned by |
| 156 | * ssh_get_authentication_socket(). |
| 157 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 158 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 159 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 160 | ssh_close_authentication_socket(int sock) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 161 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 162 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
| 163 | close(sock); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 164 | } |
| 165 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 166 | /* |
| 167 | * Opens and connects a private socket for communication with the |
| 168 | * authentication agent. Returns the file descriptor (which must be |
| 169 | * shut down and closed by the caller when no longer needed). |
| 170 | * Returns NULL if an error occurred and the connection could not be |
| 171 | * opened. |
| 172 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 173 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 174 | AuthenticationConnection * |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 175 | ssh_get_authentication_connection(void) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 176 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 177 | AuthenticationConnection *auth; |
| 178 | int sock; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 179 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 180 | sock = ssh_get_authentication_socket(); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 181 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 182 | /* |
| 183 | * Fail if we couldn't obtain a connection. This happens if we |
| 184 | * exited due to a timeout. |
| 185 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 186 | if (sock < 0) |
| 187 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 188 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 189 | auth = xmalloc(sizeof(*auth)); |
| 190 | auth->fd = sock; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 191 | buffer_init(&auth->identities); |
| 192 | auth->howmany = 0; |
| 193 | |
| 194 | return auth; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 195 | } |
| 196 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 197 | /* |
| 198 | * Closes the connection to the authentication agent and frees any associated |
| 199 | * memory. |
| 200 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 201 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 202 | void |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 203 | ssh_close_authentication_connection(AuthenticationConnection *auth) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 204 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 205 | buffer_free(&auth->identities); |
| 206 | close(auth->fd); |
| 207 | xfree(auth); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 208 | } |
| 209 | |
Ben Lindstrom | 2f71704 | 2002-06-06 21:52:03 +0000 | [diff] [blame] | 210 | /* Lock/unlock agent */ |
| 211 | int |
| 212 | ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password) |
| 213 | { |
| 214 | int type; |
| 215 | Buffer msg; |
| 216 | |
| 217 | buffer_init(&msg); |
| 218 | buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK); |
| 219 | buffer_put_cstring(&msg, password); |
| 220 | |
| 221 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 222 | buffer_free(&msg); |
| 223 | return 0; |
| 224 | } |
| 225 | type = buffer_get_char(&msg); |
| 226 | buffer_free(&msg); |
| 227 | return decode_reply(type); |
| 228 | } |
| 229 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 230 | /* |
| 231 | * Returns the first authentication identity held by the agent. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 232 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 233 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 234 | int |
| 235 | ssh_get_num_identities(AuthenticationConnection *auth, int version) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 236 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 237 | int type, code1 = 0, code2 = 0; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 238 | Buffer request; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 239 | |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 240 | switch (version) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 241 | case 1: |
| 242 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; |
| 243 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; |
| 244 | break; |
| 245 | case 2: |
| 246 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; |
| 247 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; |
| 248 | break; |
| 249 | default: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 250 | return 0; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 251 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 252 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 253 | /* |
| 254 | * Send a message to the agent requesting for a list of the |
| 255 | * identities it can represent. |
| 256 | */ |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 257 | buffer_init(&request); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 258 | buffer_put_char(&request, code1); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 259 | |
| 260 | buffer_clear(&auth->identities); |
| 261 | if (ssh_request_reply(auth, &request, &auth->identities) == 0) { |
| 262 | buffer_free(&request); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 263 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 264 | } |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 265 | buffer_free(&request); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 266 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 267 | /* Get message type, and verify that we got a proper answer. */ |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 268 | type = buffer_get_char(&auth->identities); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 269 | if (agent_failed(type)) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 270 | return 0; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 271 | } else if (type != code2) { |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 272 | fatal("Bad authentication reply message type: %d", type); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 273 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 274 | |
| 275 | /* Get the number of entries in the response and check it for sanity. */ |
| 276 | auth->howmany = buffer_get_int(&auth->identities); |
| 277 | if (auth->howmany > 1024) |
Ben Lindstrom | 6df8ef4 | 2001-03-05 07:47:23 +0000 | [diff] [blame] | 278 | fatal("Too many identities in authentication reply: %d", |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 279 | auth->howmany); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 280 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 281 | return auth->howmany; |
| 282 | } |
| 283 | |
| 284 | Key * |
| 285 | ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) |
| 286 | { |
| 287 | /* get number of identities and return the first entry (if any). */ |
| 288 | if (ssh_get_num_identities(auth, version) > 0) |
| 289 | return ssh_get_next_identity(auth, comment, version); |
| 290 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 291 | } |
| 292 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 293 | Key * |
| 294 | ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 295 | { |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 296 | u_int bits; |
| 297 | u_char *blob; |
| 298 | u_int blen; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 299 | Key *key = NULL; |
Damien Miller | 7e8e820 | 1999-11-16 13:37:16 +1100 | [diff] [blame] | 300 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 301 | /* Return failure if no more entries. */ |
| 302 | if (auth->howmany <= 0) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 303 | return NULL; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 304 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 305 | /* |
| 306 | * Get the next entry from the packet. These will abort with a fatal |
| 307 | * error if the packet is too short or contains corrupt data. |
| 308 | */ |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 309 | switch (version) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 310 | case 1: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 311 | key = key_new(KEY_RSA1); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 312 | bits = buffer_get_int(&auth->identities); |
| 313 | buffer_get_bignum(&auth->identities, key->rsa->e); |
| 314 | buffer_get_bignum(&auth->identities, key->rsa->n); |
| 315 | *comment = buffer_get_string(&auth->identities, NULL); |
| 316 | if (bits != BN_num_bits(key->rsa->n)) |
| 317 | log("Warning: identity keysize mismatch: actual %d, announced %u", |
| 318 | BN_num_bits(key->rsa->n), bits); |
| 319 | break; |
| 320 | case 2: |
| 321 | blob = buffer_get_string(&auth->identities, &blen); |
| 322 | *comment = buffer_get_string(&auth->identities, NULL); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 323 | key = key_from_blob(blob, blen); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 324 | xfree(blob); |
| 325 | break; |
| 326 | default: |
| 327 | return NULL; |
| 328 | break; |
| 329 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 330 | /* Decrement the number of remaining entries. */ |
| 331 | auth->howmany--; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 332 | return key; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 333 | } |
| 334 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 335 | /* |
| 336 | * Generates a random challenge, sends it to the agent, and waits for |
| 337 | * response from the agent. Returns true (non-zero) if the agent gave the |
| 338 | * correct answer, zero otherwise. Response type selects the style of |
| 339 | * response desired, with 0 corresponding to protocol version 1.0 (no longer |
| 340 | * supported) and 1 corresponding to protocol version 1.1. |
| 341 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 342 | |
| 343 | int |
| 344 | ssh_decrypt_challenge(AuthenticationConnection *auth, |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 345 | Key* key, BIGNUM *challenge, |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 346 | u_char session_id[16], |
| 347 | u_int response_type, |
| 348 | u_char response[16]) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 349 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 350 | Buffer buffer; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 351 | int success = 0; |
| 352 | int i; |
| 353 | int type; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 354 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 355 | if (key->type != KEY_RSA1) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 356 | return 0; |
| 357 | if (response_type == 0) { |
| 358 | log("Compatibility with ssh protocol version 1.0 no longer supported."); |
| 359 | return 0; |
| 360 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 361 | buffer_init(&buffer); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 362 | buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 363 | buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); |
| 364 | buffer_put_bignum(&buffer, key->rsa->e); |
| 365 | buffer_put_bignum(&buffer, key->rsa->n); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 366 | buffer_put_bignum(&buffer, challenge); |
Damien Miller | 4a8ed54 | 2002-01-22 23:33:31 +1100 | [diff] [blame] | 367 | buffer_append(&buffer, session_id, 16); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 368 | buffer_put_int(&buffer, response_type); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 369 | |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 370 | if (ssh_request_reply(auth, &buffer, &buffer) == 0) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 371 | buffer_free(&buffer); |
| 372 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 373 | } |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 374 | type = buffer_get_char(&buffer); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 375 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 376 | if (agent_failed(type)) { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 377 | log("Agent admitted failure to authenticate using the key."); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 378 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
| 379 | fatal("Bad authentication response: %d", type); |
| 380 | } else { |
| 381 | success = 1; |
| 382 | /* |
| 383 | * Get the response from the packet. This will abort with a |
| 384 | * fatal error if the packet is corrupt. |
| 385 | */ |
| 386 | for (i = 0; i < 16; i++) |
| 387 | response[i] = buffer_get_char(&buffer); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 388 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 389 | buffer_free(&buffer); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 390 | return success; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 391 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 392 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 393 | /* ask agent to sign data, returns -1 on error, 0 on success */ |
| 394 | int |
| 395 | ssh_agent_sign(AuthenticationConnection *auth, |
| 396 | Key *key, |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 397 | u_char **sigp, u_int *lenp, |
| 398 | u_char *data, u_int datalen) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 399 | { |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 400 | extern int datafellows; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 401 | Buffer msg; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 402 | u_char *blob; |
| 403 | u_int blen; |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 404 | int type, flags = 0; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 405 | int ret = -1; |
| 406 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 407 | if (key_to_blob(key, &blob, &blen) == 0) |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 408 | return -1; |
| 409 | |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 410 | if (datafellows & SSH_BUG_SIGBLOB) |
| 411 | flags = SSH_AGENT_OLD_SIGNATURE; |
| 412 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 413 | buffer_init(&msg); |
| 414 | buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); |
| 415 | buffer_put_string(&msg, blob, blen); |
| 416 | buffer_put_string(&msg, data, datalen); |
Damien Miller | 62cee00 | 2000-09-23 17:15:56 +1100 | [diff] [blame] | 417 | buffer_put_int(&msg, flags); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 418 | xfree(blob); |
| 419 | |
| 420 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 421 | buffer_free(&msg); |
| 422 | return -1; |
| 423 | } |
| 424 | type = buffer_get_char(&msg); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 425 | if (agent_failed(type)) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 426 | log("Agent admitted failure to sign using the key."); |
| 427 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { |
| 428 | fatal("Bad authentication response: %d", type); |
| 429 | } else { |
| 430 | ret = 0; |
| 431 | *sigp = buffer_get_string(&msg, lenp); |
| 432 | } |
| 433 | buffer_free(&msg); |
| 434 | return ret; |
| 435 | } |
| 436 | |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 437 | /* Encode key for a message to the agent. */ |
| 438 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 439 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 440 | ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 441 | { |
| 442 | buffer_clear(b); |
| 443 | buffer_put_char(b, SSH_AGENTC_ADD_RSA_IDENTITY); |
| 444 | buffer_put_int(b, BN_num_bits(key->n)); |
| 445 | buffer_put_bignum(b, key->n); |
| 446 | buffer_put_bignum(b, key->e); |
| 447 | buffer_put_bignum(b, key->d); |
| 448 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ |
| 449 | buffer_put_bignum(b, key->iqmp); /* ssh key->u */ |
| 450 | buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ |
| 451 | buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ |
Ben Lindstrom | 664408d | 2001-06-09 01:42:01 +0000 | [diff] [blame] | 452 | buffer_put_cstring(b, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 453 | } |
| 454 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 455 | static void |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 456 | ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 457 | { |
| 458 | buffer_clear(b); |
| 459 | buffer_put_char(b, SSH2_AGENTC_ADD_IDENTITY); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 460 | buffer_put_cstring(b, key_ssh_name(key)); |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 461 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 462 | case KEY_RSA: |
| 463 | buffer_put_bignum2(b, key->rsa->n); |
| 464 | buffer_put_bignum2(b, key->rsa->e); |
| 465 | buffer_put_bignum2(b, key->rsa->d); |
| 466 | buffer_put_bignum2(b, key->rsa->iqmp); |
| 467 | buffer_put_bignum2(b, key->rsa->p); |
| 468 | buffer_put_bignum2(b, key->rsa->q); |
| 469 | break; |
| 470 | case KEY_DSA: |
| 471 | buffer_put_bignum2(b, key->dsa->p); |
| 472 | buffer_put_bignum2(b, key->dsa->q); |
| 473 | buffer_put_bignum2(b, key->dsa->g); |
| 474 | buffer_put_bignum2(b, key->dsa->pub_key); |
| 475 | buffer_put_bignum2(b, key->dsa->priv_key); |
| 476 | break; |
| 477 | } |
| 478 | buffer_put_cstring(b, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 479 | } |
| 480 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 481 | /* |
| 482 | * Adds an identity to the authentication server. This call is not meant to |
| 483 | * be used by normal applications. |
| 484 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 485 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 486 | int |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 487 | ssh_add_identity(AuthenticationConnection *auth, Key *key, const char *comment) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 488 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 489 | Buffer msg; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 490 | int type; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 491 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 492 | buffer_init(&msg); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 493 | |
| 494 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 495 | case KEY_RSA1: |
| 496 | ssh_encode_identity_rsa1(&msg, key->rsa, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 497 | break; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 498 | case KEY_RSA: |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 499 | case KEY_DSA: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 500 | ssh_encode_identity_ssh2(&msg, key, comment); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 501 | break; |
| 502 | default: |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 503 | buffer_free(&msg); |
Damien Miller | 994cf14 | 2000-07-21 10:19:44 +1000 | [diff] [blame] | 504 | return 0; |
| 505 | break; |
| 506 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 507 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 508 | buffer_free(&msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 509 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 510 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 511 | type = buffer_get_char(&msg); |
| 512 | buffer_free(&msg); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 513 | return decode_reply(type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 514 | } |
| 515 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 516 | /* |
| 517 | * Removes an identity from the authentication server. This call is not |
| 518 | * meant to be used by normal applications. |
| 519 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 520 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 521 | int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 522 | ssh_remove_identity(AuthenticationConnection *auth, Key *key) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 523 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 524 | Buffer msg; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 525 | int type; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 526 | u_char *blob; |
| 527 | u_int blen; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 528 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 529 | buffer_init(&msg); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 530 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 531 | if (key->type == KEY_RSA1) { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 532 | buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); |
| 533 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); |
| 534 | buffer_put_bignum(&msg, key->rsa->e); |
| 535 | buffer_put_bignum(&msg, key->rsa->n); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 536 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { |
| 537 | key_to_blob(key, &blob, &blen); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 538 | buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); |
| 539 | buffer_put_string(&msg, blob, blen); |
| 540 | xfree(blob); |
| 541 | } else { |
| 542 | buffer_free(&msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 543 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 544 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 545 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 546 | buffer_free(&msg); |
| 547 | return 0; |
| 548 | } |
| 549 | type = buffer_get_char(&msg); |
| 550 | buffer_free(&msg); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 551 | return decode_reply(type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 552 | } |
| 553 | |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 554 | int |
Ben Lindstrom | c90f8a9 | 2002-06-21 00:06:54 +0000 | [diff] [blame^] | 555 | ssh_constrain_identity(AuthenticationConnection *auth, Key *key, u_int life) |
Ben Lindstrom | 61d328a | 2002-06-06 21:54:57 +0000 | [diff] [blame] | 556 | { |
| 557 | Buffer msg; |
| 558 | int type; |
| 559 | u_char *blob; |
| 560 | u_int blen; |
| 561 | |
| 562 | buffer_init(&msg); |
| 563 | |
| 564 | if (key->type == KEY_RSA1) { |
Ben Lindstrom | c90f8a9 | 2002-06-21 00:06:54 +0000 | [diff] [blame^] | 565 | buffer_put_char(&msg, SSH_AGENTC_CONSTRAIN_IDENTITY1); |
Ben Lindstrom | 61d328a | 2002-06-06 21:54:57 +0000 | [diff] [blame] | 566 | buffer_put_int(&msg, BN_num_bits(key->rsa->n)); |
| 567 | buffer_put_bignum(&msg, key->rsa->e); |
| 568 | buffer_put_bignum(&msg, key->rsa->n); |
| 569 | } else if (key->type == KEY_DSA || key->type == KEY_RSA) { |
| 570 | key_to_blob(key, &blob, &blen); |
Ben Lindstrom | c90f8a9 | 2002-06-21 00:06:54 +0000 | [diff] [blame^] | 571 | buffer_put_char(&msg, SSH_AGENTC_CONSTRAIN_IDENTITY); |
Ben Lindstrom | 61d328a | 2002-06-06 21:54:57 +0000 | [diff] [blame] | 572 | buffer_put_string(&msg, blob, blen); |
| 573 | xfree(blob); |
| 574 | } else { |
| 575 | buffer_free(&msg); |
| 576 | return 0; |
| 577 | } |
Ben Lindstrom | c90f8a9 | 2002-06-21 00:06:54 +0000 | [diff] [blame^] | 578 | buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); |
Ben Lindstrom | 4eb4c4e | 2002-06-21 00:04:48 +0000 | [diff] [blame] | 579 | buffer_put_int(&msg, life); |
| 580 | |
Ben Lindstrom | 61d328a | 2002-06-06 21:54:57 +0000 | [diff] [blame] | 581 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 582 | buffer_free(&msg); |
| 583 | return 0; |
| 584 | } |
| 585 | type = buffer_get_char(&msg); |
| 586 | buffer_free(&msg); |
| 587 | return decode_reply(type); |
| 588 | } |
| 589 | |
| 590 | int |
Ben Lindstrom | ba72d30 | 2002-03-22 03:51:06 +0000 | [diff] [blame] | 591 | ssh_update_card(AuthenticationConnection *auth, int add, const char *reader_id, const char *pin) |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 592 | { |
| 593 | Buffer msg; |
| 594 | int type; |
| 595 | |
| 596 | buffer_init(&msg); |
| 597 | buffer_put_char(&msg, add ? SSH_AGENTC_ADD_SMARTCARD_KEY : |
| 598 | SSH_AGENTC_REMOVE_SMARTCARD_KEY); |
Ben Lindstrom | f7db3bb | 2001-08-06 21:35:51 +0000 | [diff] [blame] | 599 | buffer_put_cstring(&msg, reader_id); |
Ben Lindstrom | ba72d30 | 2002-03-22 03:51:06 +0000 | [diff] [blame] | 600 | buffer_put_cstring(&msg, pin); |
Ben Lindstrom | 036a6b2 | 2001-07-04 03:50:02 +0000 | [diff] [blame] | 601 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 602 | buffer_free(&msg); |
| 603 | return 0; |
| 604 | } |
| 605 | type = buffer_get_char(&msg); |
| 606 | buffer_free(&msg); |
| 607 | return decode_reply(type); |
| 608 | } |
| 609 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 610 | /* |
| 611 | * Removes all identities from the agent. This call is not meant to be used |
| 612 | * by normal applications. |
| 613 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 614 | |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 615 | int |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 616 | ssh_remove_all_identities(AuthenticationConnection *auth, int version) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 617 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 618 | Buffer msg; |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 619 | int type; |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 620 | int code = (version==1) ? |
| 621 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : |
| 622 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 623 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 624 | buffer_init(&msg); |
| 625 | buffer_put_char(&msg, code); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 626 | |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 627 | if (ssh_request_reply(auth, &msg, &msg) == 0) { |
| 628 | buffer_free(&msg); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 629 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 630 | } |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 631 | type = buffer_get_char(&msg); |
| 632 | buffer_free(&msg); |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 633 | return decode_reply(type); |
| 634 | } |
| 635 | |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 636 | int |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 637 | decode_reply(int type) |
| 638 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 639 | switch (type) { |
| 640 | case SSH_AGENT_FAILURE: |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 641 | case SSH_COM_AGENT2_FAILURE: |
Ben Lindstrom | c9a2636 | 2001-08-15 23:04:50 +0000 | [diff] [blame] | 642 | case SSH2_AGENT_FAILURE: |
Damien Miller | 942da03 | 2000-08-18 13:59:06 +1000 | [diff] [blame] | 643 | log("SSH_AGENT_FAILURE"); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 644 | return 0; |
| 645 | case SSH_AGENT_SUCCESS: |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 646 | return 1; |
| 647 | default: |
Damien Miller | 3702396 | 2000-07-11 17:31:38 +1000 | [diff] [blame] | 648 | fatal("Bad response from authentication agent: %d", type); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 649 | } |
| 650 | /* NOTREACHED */ |
| 651 | return 0; |
| 652 | } |