1 /* 2 * Dropbear - a SSH2 server 3 * 4 * Copyright (c) 2002,2003 Matt Johnston 5 * All rights reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. */ 24 25 #include "includes.h" 26 #include "dbutil.h" 27 #include "service.h" 28 #include "session.h" 29 #include "packet.h" 30 #include "ssh.h" 31 #include "auth.h" 32 33 static void send_msg_service_accept(unsigned char *name, int len); 34 35 /* processes a SSH_MSG_SERVICE_REQUEST, returning 0 if finished, 36 * 1 if not */ 37 void recv_msg_service_request() { 38 39 unsigned char * name; 40 unsigned int len; 41 42 TRACE(("enter recv_msg_service_request")) 43 44 name = buf_getstring(ses.payload, &len); 45 46 /* ssh-userauth */ 47 if (len == SSH_SERVICE_USERAUTH_LEN && 48 strncmp(SSH_SERVICE_USERAUTH, name, len) == 0) { 49 50 send_msg_service_accept(name, len); 51 m_free(name); 52 TRACE(("leave recv_msg_service_request: done ssh-userauth")) 53 return; 54 } 55 56 /* ssh-connection */ 57 if (len == SSH_SERVICE_CONNECTION_LEN && 58 (strncmp(SSH_SERVICE_CONNECTION, name, len) == 0)) { 59 if (ses.authstate.authdone != 1) { 60 dropbear_exit("request for connection before auth"); 61 } 62 63 send_msg_service_accept(name, len); 64 m_free(name); 65 TRACE(("leave recv_msg_service_request: done ssh-connection")) 66 return; 67 } 68 69 m_free(name); 70 /* TODO this should be a MSG_DISCONNECT */ 71 dropbear_exit("unrecognised SSH_MSG_SERVICE_REQUEST"); 72 73 74 } 75 76 static void send_msg_service_accept(unsigned char *name, int len) { 77 78 TRACE(("accepting service %s", name)) 79 80 CHECKCLEARTOWRITE(); 81 82 buf_putbyte(ses.writepayload, SSH_MSG_SERVICE_ACCEPT); 83 buf_putstring(ses.writepayload, name, len); 84 85 encrypt_packet(); 86 87 } 88
