Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1 | /* $OpenBSD: authfd.c,v 1.94 2015/01/14 20:05:27 djm Exp $ */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2 | /* |
| 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
| 6 | * Functions for connecting the local authentication agent. |
| 7 | * |
| 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". |
| 13 | * |
| 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. |
| 36 | */ |
| 37 | |
| 38 | #include "includes.h" |
| 39 | |
| 40 | #include <sys/types.h> |
| 41 | #include <sys/un.h> |
| 42 | #include <sys/socket.h> |
| 43 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 44 | #include <fcntl.h> |
| 45 | #include <stdlib.h> |
| 46 | #include <signal.h> |
| 47 | #include <stdarg.h> |
| 48 | #include <string.h> |
| 49 | #include <unistd.h> |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 50 | #include <errno.h> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 51 | |
| 52 | #include "xmalloc.h" |
| 53 | #include "ssh.h" |
| 54 | #include "rsa.h" |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 55 | #include "sshbuf.h" |
| 56 | #include "sshkey.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 57 | #include "authfd.h" |
| 58 | #include "cipher.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 59 | #include "compat.h" |
| 60 | #include "log.h" |
| 61 | #include "atomicio.h" |
| 62 | #include "misc.h" |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 63 | #include "ssherr.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 64 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 65 | #define MAX_AGENT_IDENTITIES 2048 /* Max keys in agent reply */ |
| 66 | #define MAX_AGENT_REPLY_LEN (256 * 1024) /* Max bytes in agent reply */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 67 | |
| 68 | /* macro to check for "agent failure" message */ |
| 69 | #define agent_failed(x) \ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 70 | ((x == SSH_AGENT_FAILURE) || \ |
| 71 | (x == SSH_COM_AGENT2_FAILURE) || \ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 72 | (x == SSH2_AGENT_FAILURE)) |
| 73 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 74 | /* Convert success/failure response from agent to a err.h status */ |
| 75 | static int |
| 76 | decode_reply(u_char type) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 77 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 78 | if (agent_failed(type)) |
| 79 | return SSH_ERR_AGENT_FAILURE; |
| 80 | else if (type == SSH_AGENT_SUCCESS) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 81 | return 0; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 82 | else |
| 83 | return SSH_ERR_INVALID_FORMAT; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | /* Returns the number of the authentication fd, or -1 if there is none. */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 87 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 88 | ssh_get_authentication_socket(int *fdp) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 89 | { |
| 90 | const char *authsocket; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 91 | int sock, oerrno; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 92 | struct sockaddr_un sunaddr; |
| 93 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 94 | if (fdp != NULL) |
| 95 | *fdp = -1; |
| 96 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 97 | authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); |
| 98 | if (!authsocket) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 99 | return SSH_ERR_AGENT_NOT_PRESENT; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 100 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 101 | memset(&sunaddr, 0, sizeof(sunaddr)); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 102 | sunaddr.sun_family = AF_UNIX; |
| 103 | strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); |
| 104 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 105 | if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) |
| 106 | return SSH_ERR_SYSTEM_ERROR; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 107 | |
| 108 | /* close on exec */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 109 | if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1 || |
| 110 | connect(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) { |
| 111 | oerrno = errno; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 112 | close(sock); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 113 | errno = oerrno; |
| 114 | return SSH_ERR_SYSTEM_ERROR; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 115 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 116 | if (fdp != NULL) |
| 117 | *fdp = sock; |
| 118 | else |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 119 | close(sock); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 120 | return 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 121 | } |
| 122 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 123 | /* Communicate with agent: send request and read reply */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 124 | static int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 125 | ssh_request_reply(int sock, struct sshbuf *request, struct sshbuf *reply) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 126 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 127 | int r; |
| 128 | size_t l, len; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 129 | char buf[1024]; |
| 130 | |
| 131 | /* Get the length of the message, and format it in the buffer. */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 132 | len = sshbuf_len(request); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 133 | put_u32(buf, len); |
| 134 | |
| 135 | /* Send the length and then the packet to the agent. */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 136 | if (atomicio(vwrite, sock, buf, 4) != 4 || |
| 137 | atomicio(vwrite, sock, (u_char *)sshbuf_ptr(request), |
| 138 | sshbuf_len(request)) != sshbuf_len(request)) |
| 139 | return SSH_ERR_AGENT_COMMUNICATION; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 140 | /* |
| 141 | * Wait for response from the agent. First read the length of the |
| 142 | * response packet. |
| 143 | */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 144 | if (atomicio(read, sock, buf, 4) != 4) |
| 145 | return SSH_ERR_AGENT_COMMUNICATION; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 146 | |
| 147 | /* Extract the length, and check it for sanity. */ |
| 148 | len = get_u32(buf); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 149 | if (len > MAX_AGENT_REPLY_LEN) |
| 150 | return SSH_ERR_INVALID_FORMAT; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 151 | |
| 152 | /* Read the rest of the response in to the buffer. */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 153 | sshbuf_reset(reply); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 154 | while (len > 0) { |
| 155 | l = len; |
| 156 | if (l > sizeof(buf)) |
| 157 | l = sizeof(buf); |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 158 | if (atomicio(read, sock, buf, l) != l) |
| 159 | return SSH_ERR_AGENT_COMMUNICATION; |
| 160 | if ((r = sshbuf_put(reply, buf, l)) != 0) |
| 161 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 162 | len -= l; |
| 163 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 164 | return 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Closes the agent socket if it should be closed (depends on how it was |
| 169 | * obtained). The argument must have been returned by |
| 170 | * ssh_get_authentication_socket(). |
| 171 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 172 | void |
| 173 | ssh_close_authentication_socket(int sock) |
| 174 | { |
| 175 | if (getenv(SSH_AUTHSOCKET_ENV_NAME)) |
| 176 | close(sock); |
| 177 | } |
| 178 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 179 | /* Lock/unlock agent */ |
| 180 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 181 | ssh_lock_agent(int sock, int lock, const char *password) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 182 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 183 | int r; |
| 184 | u_char type = lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK; |
| 185 | struct sshbuf *msg; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 186 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 187 | if ((msg = sshbuf_new()) == NULL) |
| 188 | return SSH_ERR_ALLOC_FAIL; |
| 189 | if ((r = sshbuf_put_u8(msg, type)) != 0 || |
| 190 | (r = sshbuf_put_cstring(msg, password)) != 0) |
| 191 | goto out; |
| 192 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 193 | goto out; |
| 194 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 195 | goto out; |
| 196 | r = decode_reply(type); |
| 197 | out: |
| 198 | sshbuf_free(msg); |
| 199 | return r; |
| 200 | } |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 201 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 202 | #ifdef WITH_SSH1 |
| 203 | static int |
| 204 | deserialise_identity1(struct sshbuf *ids, struct sshkey **keyp, char **commentp) |
| 205 | { |
| 206 | struct sshkey *key; |
| 207 | int r, keybits; |
| 208 | u_int32_t bits; |
| 209 | char *comment = NULL; |
| 210 | |
| 211 | if ((key = sshkey_new(KEY_RSA1)) == NULL) |
| 212 | return SSH_ERR_ALLOC_FAIL; |
| 213 | if ((r = sshbuf_get_u32(ids, &bits)) != 0 || |
| 214 | (r = sshbuf_get_bignum1(ids, key->rsa->e)) != 0 || |
| 215 | (r = sshbuf_get_bignum1(ids, key->rsa->n)) != 0 || |
| 216 | (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0) |
| 217 | goto out; |
| 218 | keybits = BN_num_bits(key->rsa->n); |
| 219 | /* XXX previously we just warned here. I think we should be strict */ |
| 220 | if (keybits < 0 || bits != (u_int)keybits) { |
| 221 | r = SSH_ERR_KEY_BITS_MISMATCH; |
| 222 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 223 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 224 | if (keyp != NULL) { |
| 225 | *keyp = key; |
| 226 | key = NULL; |
| 227 | } |
| 228 | if (commentp != NULL) { |
| 229 | *commentp = comment; |
| 230 | comment = NULL; |
| 231 | } |
| 232 | r = 0; |
| 233 | out: |
| 234 | sshkey_free(key); |
| 235 | free(comment); |
| 236 | return r; |
| 237 | } |
| 238 | #endif |
| 239 | |
| 240 | static int |
| 241 | deserialise_identity2(struct sshbuf *ids, struct sshkey **keyp, char **commentp) |
| 242 | { |
| 243 | int r; |
| 244 | char *comment = NULL; |
| 245 | const u_char *blob; |
| 246 | size_t blen; |
| 247 | |
| 248 | if ((r = sshbuf_get_string_direct(ids, &blob, &blen)) != 0 || |
| 249 | (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0) |
| 250 | goto out; |
| 251 | if ((r = sshkey_from_blob(blob, blen, keyp)) != 0) |
| 252 | goto out; |
| 253 | if (commentp != NULL) { |
| 254 | *commentp = comment; |
| 255 | comment = NULL; |
| 256 | } |
| 257 | r = 0; |
| 258 | out: |
| 259 | free(comment); |
| 260 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | /* |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 264 | * Fetch list of identities held by the agent. |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 265 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 266 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 267 | ssh_fetch_identitylist(int sock, int version, struct ssh_identitylist **idlp) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 268 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 269 | u_char type, code1 = 0, code2 = 0; |
| 270 | u_int32_t num, i; |
| 271 | struct sshbuf *msg; |
| 272 | struct ssh_identitylist *idl = NULL; |
| 273 | int r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 274 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 275 | /* Determine request and expected response types */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 276 | switch (version) { |
| 277 | case 1: |
| 278 | code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; |
| 279 | code2 = SSH_AGENT_RSA_IDENTITIES_ANSWER; |
| 280 | break; |
| 281 | case 2: |
| 282 | code1 = SSH2_AGENTC_REQUEST_IDENTITIES; |
| 283 | code2 = SSH2_AGENT_IDENTITIES_ANSWER; |
| 284 | break; |
| 285 | default: |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 286 | return SSH_ERR_INVALID_ARGUMENT; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | /* |
| 290 | * Send a message to the agent requesting for a list of the |
| 291 | * identities it can represent. |
| 292 | */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 293 | if ((msg = sshbuf_new()) == NULL) |
| 294 | return SSH_ERR_ALLOC_FAIL; |
| 295 | if ((r = sshbuf_put_u8(msg, code1)) != 0) |
| 296 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 297 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 298 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 299 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 300 | |
| 301 | /* Get message type, and verify that we got a proper answer. */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 302 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 303 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 304 | if (agent_failed(type)) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 305 | r = SSH_ERR_AGENT_FAILURE; |
| 306 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 307 | } else if (type != code2) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 308 | r = SSH_ERR_INVALID_FORMAT; |
| 309 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | /* Get the number of entries in the response and check it for sanity. */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 313 | if ((r = sshbuf_get_u32(msg, &num)) != 0) |
| 314 | goto out; |
| 315 | if (num > MAX_AGENT_IDENTITIES) { |
| 316 | r = SSH_ERR_INVALID_FORMAT; |
| 317 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 318 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 319 | if (num == 0) { |
| 320 | r = SSH_ERR_AGENT_NO_IDENTITIES; |
| 321 | goto out; |
| 322 | } |
| 323 | |
| 324 | /* Deserialise the response into a list of keys/comments */ |
| 325 | if ((idl = calloc(1, sizeof(*idl))) == NULL || |
| 326 | (idl->keys = calloc(num, sizeof(*idl->keys))) == NULL || |
| 327 | (idl->comments = calloc(num, sizeof(*idl->comments))) == NULL) { |
| 328 | r = SSH_ERR_ALLOC_FAIL; |
| 329 | goto out; |
| 330 | } |
| 331 | for (i = 0; i < num;) { |
| 332 | switch (version) { |
| 333 | case 1: |
| 334 | #ifdef WITH_SSH1 |
| 335 | if ((r = deserialise_identity1(msg, |
| 336 | &(idl->keys[i]), &(idl->comments[i]))) != 0) |
| 337 | goto out; |
| 338 | #endif |
| 339 | break; |
| 340 | case 2: |
| 341 | if ((r = deserialise_identity2(msg, |
| 342 | &(idl->keys[i]), &(idl->comments[i]))) != 0) { |
| 343 | if (r == SSH_ERR_KEY_TYPE_UNKNOWN) { |
| 344 | /* Gracefully skip unknown key types */ |
| 345 | num--; |
| 346 | continue; |
| 347 | } else |
| 348 | goto out; |
| 349 | } |
| 350 | break; |
| 351 | } |
| 352 | i++; |
| 353 | } |
| 354 | idl->nkeys = num; |
| 355 | *idlp = idl; |
| 356 | idl = NULL; |
| 357 | r = 0; |
| 358 | out: |
| 359 | sshbuf_free(msg); |
| 360 | if (idl != NULL) |
| 361 | ssh_free_identitylist(idl); |
| 362 | return r; |
| 363 | } |
| 364 | |
| 365 | void |
| 366 | ssh_free_identitylist(struct ssh_identitylist *idl) |
| 367 | { |
| 368 | size_t i; |
| 369 | |
| 370 | if (idl == NULL) |
| 371 | return; |
| 372 | for (i = 0; i < idl->nkeys; i++) { |
| 373 | if (idl->keys != NULL) |
| 374 | sshkey_free(idl->keys[i]); |
| 375 | if (idl->comments != NULL) |
| 376 | free(idl->comments[i]); |
| 377 | } |
| 378 | free(idl); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | /* |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 382 | * Sends a challenge (typically from a server via ssh(1)) to the agent, |
| 383 | * and waits for a response from the agent. |
| 384 | * Returns true (non-zero) if the agent gave the correct answer, zero |
| 385 | * otherwise. |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 386 | */ |
| 387 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 388 | #ifdef WITH_SSH1 |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 389 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 390 | ssh_decrypt_challenge(int sock, struct sshkey* key, BIGNUM *challenge, |
| 391 | u_char session_id[16], u_char response[16]) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 392 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 393 | struct sshbuf *msg; |
| 394 | int r; |
| 395 | u_char type; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 396 | |
| 397 | if (key->type != KEY_RSA1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 398 | return SSH_ERR_INVALID_ARGUMENT; |
| 399 | if ((msg = sshbuf_new()) == NULL) |
| 400 | return SSH_ERR_ALLOC_FAIL; |
| 401 | if ((r = sshbuf_put_u8(msg, SSH_AGENTC_RSA_CHALLENGE)) != 0 || |
| 402 | (r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 || |
| 403 | (r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 || |
| 404 | (r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0 || |
| 405 | (r = sshbuf_put_bignum1(msg, challenge)) != 0 || |
| 406 | (r = sshbuf_put(msg, session_id, 16)) != 0 || |
| 407 | (r = sshbuf_put_u32(msg, 1)) != 0) /* Response type for proto 1.1 */ |
| 408 | goto out; |
| 409 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 410 | goto out; |
| 411 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 412 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 413 | if (agent_failed(type)) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 414 | r = SSH_ERR_AGENT_FAILURE; |
| 415 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 416 | } else if (type != SSH_AGENT_RSA_RESPONSE) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 417 | r = SSH_ERR_INVALID_FORMAT; |
| 418 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 419 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 420 | if ((r = sshbuf_get(msg, response, 16)) != 0) |
| 421 | goto out; |
| 422 | r = 0; |
| 423 | out: |
| 424 | sshbuf_free(msg); |
| 425 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 426 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 427 | #endif |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 428 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 429 | /* ask agent to sign data, returns err.h code on error, 0 on success */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 430 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 431 | ssh_agent_sign(int sock, struct sshkey *key, |
| 432 | u_char **sigp, size_t *lenp, |
| 433 | const u_char *data, size_t datalen, u_int compat) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 434 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 435 | struct sshbuf *msg; |
| 436 | u_char *blob = NULL, type; |
| 437 | size_t blen = 0, len = 0; |
| 438 | u_int flags = 0; |
| 439 | int r = SSH_ERR_INTERNAL_ERROR; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 440 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 441 | if (sigp != NULL) |
| 442 | *sigp = NULL; |
| 443 | if (lenp != NULL) |
| 444 | *lenp = 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 445 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 446 | if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE) |
| 447 | return SSH_ERR_INVALID_ARGUMENT; |
| 448 | if (compat & SSH_BUG_SIGBLOB) |
| 449 | flags |= SSH_AGENT_OLD_SIGNATURE; |
| 450 | if ((msg = sshbuf_new()) == NULL) |
| 451 | return SSH_ERR_ALLOC_FAIL; |
| 452 | if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) |
| 453 | goto out; |
| 454 | if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 || |
| 455 | (r = sshbuf_put_string(msg, blob, blen)) != 0 || |
| 456 | (r = sshbuf_put_string(msg, data, datalen)) != 0 || |
| 457 | (r = sshbuf_put_u32(msg, flags)) != 0) |
| 458 | goto out; |
| 459 | if ((r = ssh_request_reply(sock, msg, msg) != 0)) |
| 460 | goto out; |
| 461 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 462 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 463 | if (agent_failed(type)) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 464 | r = SSH_ERR_AGENT_FAILURE; |
| 465 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 466 | } else if (type != SSH2_AGENT_SIGN_RESPONSE) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 467 | r = SSH_ERR_INVALID_FORMAT; |
| 468 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 469 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 470 | if ((r = sshbuf_get_string(msg, sigp, &len)) != 0) |
| 471 | goto out; |
| 472 | *lenp = len; |
| 473 | r = 0; |
| 474 | out: |
| 475 | if (blob != NULL) { |
| 476 | explicit_bzero(blob, blen); |
| 477 | free(blob); |
| 478 | } |
| 479 | sshbuf_free(msg); |
| 480 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | /* Encode key for a message to the agent. */ |
| 484 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 485 | #ifdef WITH_SSH1 |
| 486 | static int |
| 487 | ssh_encode_identity_rsa1(struct sshbuf *b, RSA *key, const char *comment) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 488 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 489 | int r; |
| 490 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 491 | /* To keep within the protocol: p < q for ssh. in SSL p > q */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 492 | if ((r = sshbuf_put_u32(b, BN_num_bits(key->n))) != 0 || |
| 493 | (r = sshbuf_put_bignum1(b, key->n)) != 0 || |
| 494 | (r = sshbuf_put_bignum1(b, key->e)) != 0 || |
| 495 | (r = sshbuf_put_bignum1(b, key->d)) != 0 || |
| 496 | (r = sshbuf_put_bignum1(b, key->iqmp)) != 0 || |
| 497 | (r = sshbuf_put_bignum1(b, key->q)) != 0 || |
| 498 | (r = sshbuf_put_bignum1(b, key->p)) != 0 || |
| 499 | (r = sshbuf_put_cstring(b, comment)) != 0) |
| 500 | return r; |
| 501 | return 0; |
| 502 | } |
| 503 | #endif |
| 504 | |
| 505 | static int |
| 506 | ssh_encode_identity_ssh2(struct sshbuf *b, struct sshkey *key, |
| 507 | const char *comment) |
| 508 | { |
| 509 | int r; |
| 510 | |
| 511 | if ((r = sshkey_private_serialize(key, b)) != 0 || |
| 512 | (r = sshbuf_put_cstring(b, comment)) != 0) |
| 513 | return r; |
| 514 | return 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 515 | } |
| 516 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 517 | static int |
| 518 | encode_constraints(struct sshbuf *m, u_int life, u_int confirm) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 519 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 520 | int r; |
| 521 | |
| 522 | if (life != 0) { |
| 523 | if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_LIFETIME)) != 0 || |
| 524 | (r = sshbuf_put_u32(m, life)) != 0) |
| 525 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 526 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 527 | if (confirm != 0) { |
| 528 | if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_CONFIRM)) != 0) |
| 529 | goto out; |
| 530 | } |
| 531 | r = 0; |
| 532 | out: |
| 533 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | /* |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 537 | * Adds an identity to the authentication server. |
| 538 | * This call is intended only for use by ssh-add(1) and like applications. |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 539 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 540 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 541 | ssh_add_identity_constrained(int sock, struct sshkey *key, const char *comment, |
| 542 | u_int life, u_int confirm) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 543 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 544 | struct sshbuf *msg; |
| 545 | int r, constrained = (life || confirm); |
| 546 | u_char type; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 547 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 548 | if ((msg = sshbuf_new()) == NULL) |
| 549 | return SSH_ERR_ALLOC_FAIL; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 550 | |
| 551 | switch (key->type) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 552 | #ifdef WITH_SSH1 |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 553 | case KEY_RSA1: |
| 554 | type = constrained ? |
| 555 | SSH_AGENTC_ADD_RSA_ID_CONSTRAINED : |
| 556 | SSH_AGENTC_ADD_RSA_IDENTITY; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 557 | if ((r = sshbuf_put_u8(msg, type)) != 0 || |
| 558 | (r = ssh_encode_identity_rsa1(msg, key->rsa, comment)) != 0) |
| 559 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 560 | break; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 561 | #endif |
| 562 | #ifdef WITH_OPENSSL |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 563 | case KEY_RSA: |
| 564 | case KEY_RSA_CERT: |
| 565 | case KEY_RSA_CERT_V00: |
| 566 | case KEY_DSA: |
| 567 | case KEY_DSA_CERT: |
| 568 | case KEY_DSA_CERT_V00: |
| 569 | case KEY_ECDSA: |
| 570 | case KEY_ECDSA_CERT: |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 571 | #endif |
| 572 | case KEY_ED25519: |
| 573 | case KEY_ED25519_CERT: |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 574 | type = constrained ? |
| 575 | SSH2_AGENTC_ADD_ID_CONSTRAINED : |
| 576 | SSH2_AGENTC_ADD_IDENTITY; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 577 | if ((r = sshbuf_put_u8(msg, type)) != 0 || |
| 578 | (r = ssh_encode_identity_ssh2(msg, key, comment)) != 0) |
| 579 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 580 | break; |
| 581 | default: |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 582 | r = SSH_ERR_INVALID_ARGUMENT; |
| 583 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 584 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 585 | if (constrained && |
| 586 | (r = encode_constraints(msg, life, confirm)) != 0) |
| 587 | goto out; |
| 588 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 589 | goto out; |
| 590 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 591 | goto out; |
| 592 | r = decode_reply(type); |
| 593 | out: |
| 594 | sshbuf_free(msg); |
| 595 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | /* |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 599 | * Removes an identity from the authentication server. |
| 600 | * This call is intended only for use by ssh-add(1) and like applications. |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 601 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 602 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 603 | ssh_remove_identity(int sock, struct sshkey *key) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 604 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 605 | struct sshbuf *msg; |
| 606 | int r; |
| 607 | u_char type, *blob = NULL; |
| 608 | size_t blen; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 609 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 610 | if ((msg = sshbuf_new()) == NULL) |
| 611 | return SSH_ERR_ALLOC_FAIL; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 612 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 613 | #ifdef WITH_SSH1 |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 614 | if (key->type == KEY_RSA1) { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 615 | if ((r = sshbuf_put_u8(msg, |
| 616 | SSH_AGENTC_REMOVE_RSA_IDENTITY)) != 0 || |
| 617 | (r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 || |
| 618 | (r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 || |
| 619 | (r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0) |
| 620 | goto out; |
| 621 | } else |
| 622 | #endif |
| 623 | if (key->type != KEY_UNSPEC) { |
| 624 | if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) |
| 625 | goto out; |
| 626 | if ((r = sshbuf_put_u8(msg, |
| 627 | SSH2_AGENTC_REMOVE_IDENTITY)) != 0 || |
| 628 | (r = sshbuf_put_string(msg, blob, blen)) != 0) |
| 629 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 630 | } else { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 631 | r = SSH_ERR_INVALID_ARGUMENT; |
| 632 | goto out; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 633 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 634 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 635 | goto out; |
| 636 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 637 | goto out; |
| 638 | r = decode_reply(type); |
| 639 | out: |
| 640 | if (blob != NULL) { |
| 641 | explicit_bzero(blob, blen); |
| 642 | free(blob); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 643 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 644 | sshbuf_free(msg); |
| 645 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 646 | } |
| 647 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 648 | /* |
| 649 | * Add/remove an token-based identity from the authentication server. |
| 650 | * This call is intended only for use by ssh-add(1) and like applications. |
| 651 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 652 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 653 | ssh_update_card(int sock, int add, const char *reader_id, const char *pin, |
| 654 | u_int life, u_int confirm) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 655 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 656 | struct sshbuf *msg; |
| 657 | int r, constrained = (life || confirm); |
| 658 | u_char type; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 659 | |
| 660 | if (add) { |
| 661 | type = constrained ? |
| 662 | SSH_AGENTC_ADD_SMARTCARD_KEY_CONSTRAINED : |
| 663 | SSH_AGENTC_ADD_SMARTCARD_KEY; |
| 664 | } else |
| 665 | type = SSH_AGENTC_REMOVE_SMARTCARD_KEY; |
| 666 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 667 | if ((msg = sshbuf_new()) == NULL) |
| 668 | return SSH_ERR_ALLOC_FAIL; |
| 669 | if ((r = sshbuf_put_u8(msg, type)) != 0 || |
| 670 | (r = sshbuf_put_cstring(msg, reader_id)) != 0 || |
| 671 | (r = sshbuf_put_cstring(msg, pin)) != 0) |
| 672 | goto out; |
| 673 | if (constrained && |
| 674 | (r = encode_constraints(msg, life, confirm)) != 0) |
| 675 | goto out; |
| 676 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 677 | goto out; |
| 678 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 679 | goto out; |
| 680 | r = decode_reply(type); |
| 681 | out: |
| 682 | sshbuf_free(msg); |
| 683 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 684 | } |
| 685 | |
| 686 | /* |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 687 | * Removes all identities from the agent. |
| 688 | * This call is intended only for use by ssh-add(1) and like applications. |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 689 | */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 690 | int |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 691 | ssh_remove_all_identities(int sock, int version) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 692 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 693 | struct sshbuf *msg; |
| 694 | u_char type = (version == 1) ? |
| 695 | SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : |
| 696 | SSH2_AGENTC_REMOVE_ALL_IDENTITIES; |
| 697 | int r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 698 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 699 | if ((msg = sshbuf_new()) == NULL) |
| 700 | return SSH_ERR_ALLOC_FAIL; |
| 701 | if ((r = sshbuf_put_u8(msg, type)) != 0) |
| 702 | goto out; |
| 703 | if ((r = ssh_request_reply(sock, msg, msg)) != 0) |
| 704 | goto out; |
| 705 | if ((r = sshbuf_get_u8(msg, &type)) != 0) |
| 706 | goto out; |
| 707 | r = decode_reply(type); |
| 708 | out: |
| 709 | sshbuf_free(msg); |
| 710 | return r; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 711 | } |