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annotate svr-service.c @ 1777:97ad26e397a5

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Add server postauth fuzzer, wrap connect_remote()
author Matt Johnston <matt@ucc.asn.au>
date Fri, 13 Nov 2020 23:18:05 +0800
parents f20038b513a5
children
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #include "includes.h"
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26 #include "dbutil.h"
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27 #include "service.h"
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28 #include "session.h"
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29 #include "packet.h"
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30 #include "ssh.h"
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31 #include "auth.h"
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32
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33 static void send_msg_service_accept(const char *name, int len);
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35 /* processes a SSH_MSG_SERVICE_REQUEST, returning 0 if finished,
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36 * 1 if not */
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37 void recv_msg_service_request() {
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39 char * name;
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40 unsigned int len;
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41
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42 TRACE(("enter recv_msg_service_request"))
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44 name = buf_getstring(ses.payload, &len);
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46 /* ssh-userauth */
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47 if (len == SSH_SERVICE_USERAUTH_LEN &&
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48 strncmp(SSH_SERVICE_USERAUTH, name, len) == 0) {
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50 send_msg_service_accept(name, len);
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51 m_free(name);
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52 TRACE(("leave recv_msg_service_request: done ssh-userauth"))
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53 return;
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54 }
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56 /* ssh-connection */
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57 if (len == SSH_SERVICE_CONNECTION_LEN &&
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58 (strncmp(SSH_SERVICE_CONNECTION, name, len) == 0)) {
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59 if (ses.authstate.authdone != 1) {
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60 dropbear_exit("Request for connection before auth");
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61 }
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63 send_msg_service_accept(name, len);
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64 m_free(name);
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65 TRACE(("leave recv_msg_service_request: done ssh-connection"))
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66 return;
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67 }
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69 m_free(name);
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70 /* TODO this should be a MSG_DISCONNECT */
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71 dropbear_exit("Unrecognised SSH_MSG_SERVICE_REQUEST");
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74 }
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76 static void send_msg_service_accept(const char *name, int len) {
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78 TRACE(("accepting service %s", name))
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80 CHECKCLEARTOWRITE();
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82 buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_ACCEPT);
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83 buf_putstring(ses.writepayload, name, len);
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85 encrypt_packet();
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86
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87 }