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1 /* Copyright 2014 Ivo Smits <Ivo@UCIS.nl>. All rights reserved. |
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2 Redistribution and use in source and binary forms, with or without modification, are |
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3 permitted provided that the following conditions are met: |
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4 |
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5 1. Redistributions of source code must retain the above copyright notice, this list of |
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6 conditions and the following disclaimer. |
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7 |
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8 2. Redistributions in binary form must reproduce the above copyright notice, this list |
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9 of conditions and the following disclaimer in the documentation and/or other materials |
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10 provided with the distribution. |
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11 |
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12 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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13 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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14 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR |
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15 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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16 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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17 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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18 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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19 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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20 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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21 |
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22 The views and conclusions contained in the software and documentation are those of the |
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23 authors and should not be interpreted as representing official policies, either expressed |
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24 or implied, of Ivo Smits.*/ |
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25 |
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26 #include <stdbool.h> |
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27 |
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28 typedef struct tunnel_context tunnel_context; |
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29 typedef struct connection_context connection_context; |
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30 |
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31 struct connection_context { |
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32 int recv_socket; |
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33 unsigned char recv_buffer[2000]; |
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34 int recv_offset; |
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35 bool recv_encrypted; |
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36 unsigned char recv_key[32]; |
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37 unsigned char recv_nonce[24]; |
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38 |
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39 int send_socket; |
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40 bool send_encrypted; |
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41 unsigned char send_key[32]; |
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42 unsigned char send_nonce[24]; |
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43 |
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44 unsigned char local_seckey_current[32]; |
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45 unsigned char local_seckey_next[32]; |
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46 unsigned char remote_pubkey[32]; |
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47 unsigned char nonce_next[24]; |
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48 |
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49 char* password; |
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50 |
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51 bool local_tunnelready; |
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52 bool remote_tunnelready; |
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53 bool key_updated; |
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54 |
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55 bool pong; |
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56 bool startcryptauthsent; |
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57 |
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58 unsigned char remote_pubkey_expect[32]; |
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59 bool require_key_authentication; |
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60 bool require_encryption; |
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61 bool require_password_authentication; |
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62 |
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63 tunnel_context* tunnel; |
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64 }; |
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65 |
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66 bool connection_init(connection_context* context); |
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67 bool connection_init_socket(connection_context* context, const int recvsocket, const int sendsocket); |
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68 bool connection_init_encryption(connection_context* context, const unsigned char* localseckey, const unsigned char* remotepubkey); |
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69 bool connection_init_passwordauth(connection_context* context, char* password); |
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70 bool connection_init_done(connection_context* context); |
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71 bool connection_update_key(connection_context* context); |
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72 bool connection_ping(connection_context* context); |
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73 bool connection_read(connection_context* context); |
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74 bool connection_write_data(connection_context* context, unsigned char* buffer, int len); |
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75 |
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76 struct tunnel_context { |
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77 int fd; |
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78 int fake_pi; |
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79 connection_context* connection; |
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80 }; |
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81 |
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82 bool tunnel_init(tunnel_context* context); |
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83 bool tunnel_read(tunnel_context* context); |
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84 bool tunnel_write_data(tunnel_context* tunnel, unsigned char* buffer, int len); |
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85 |
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86 extern char* (*getconf)(const char*); |
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87 int errorexit(const char* text); |
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88 int errorexitf(const char* text, const char* error); |
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89 bool errorexitp(const char* text); |
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90 |
