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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_b9682cd10a3f48e47321de8901f87a77.html">libssh</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * This file is part of the SSH Library</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Copyright (c) 2009 by Aris Adamantiadis</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This library is free software; you can redistribute it and/or</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * Lesser General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * License along with this library; if not, write to the Free Software</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> */</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef SESSION_H_</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#define SESSION_H_</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <stdbool.h></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "libssh/priv.h"</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "libssh/kex.h"</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "libssh/packet.h"</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "libssh/pcap.h"</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "libssh/auth.h"</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "libssh/channels.h"</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "libssh/poll.h"</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "libssh/config.h"</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include "libssh/misc.h"</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">/* These are the different states a SSH session can be into its life */</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">enum</span> ssh_session_state_e {</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  SSH_SESSION_STATE_NONE=0,</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  SSH_SESSION_STATE_CONNECTING,</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  SSH_SESSION_STATE_SOCKET_CONNECTED,</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  SSH_SESSION_STATE_BANNER_RECEIVED,</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  SSH_SESSION_STATE_INITIAL_KEX,</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  SSH_SESSION_STATE_KEXINIT_RECEIVED,</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  SSH_SESSION_STATE_DH,</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  SSH_SESSION_STATE_AUTHENTICATING,</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  SSH_SESSION_STATE_AUTHENTICATED,</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  SSH_SESSION_STATE_ERROR,</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  SSH_SESSION_STATE_DISCONNECTED</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> };</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">enum</span> ssh_dh_state_e {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  DH_STATE_INIT=0,</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  DH_STATE_GROUP_SENT,</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  DH_STATE_REQUEST_SENT,</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  DH_STATE_INIT_SENT,</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  DH_STATE_NEWKEYS_SENT,</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  DH_STATE_FINISHED</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> };</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">enum</span> ssh_pending_call_e {</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  SSH_PENDING_CALL_NONE = 0,</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  SSH_PENDING_CALL_CONNECT,</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  SSH_PENDING_CALL_AUTH_NONE,</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  SSH_PENDING_CALL_AUTH_PASSWORD,</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  SSH_PENDING_CALL_AUTH_OFFER_PUBKEY,</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  SSH_PENDING_CALL_AUTH_PUBKEY,</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  SSH_PENDING_CALL_AUTH_AGENT,</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  SSH_PENDING_CALL_AUTH_KBDINT_INIT,</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  SSH_PENDING_CALL_AUTH_KBDINT_SEND,</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  SSH_PENDING_CALL_AUTH_GSSAPI_MIC</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> };</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">/* libssh calls may block an undefined amount of time */</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#define SSH_SESSION_FLAG_BLOCKING 1</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">/* Client successfully authenticated */</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#define SSH_SESSION_FLAG_AUTHENTICATED 2</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">/* The KEXINIT message can be sent first by either of the parties so this flag</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * indicates that the message was already sent to make sure it is sent and avoid</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> * sending it twice during key exchange to simplify the state machine. */</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#define SSH_SESSION_FLAG_KEXINIT_SENT 4</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">/* The current SSH2 session implements the "strict KEX" feature and should behave</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * differently on SSH2_MSG_NEWKEYS. */</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#define SSH_SESSION_FLAG_KEX_STRICT 0x0010</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment">/* Unexpected packets have been sent while the session was still unencrypted */</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#define SSH_SESSION_FLAG_KEX_TAINTED 0x0020</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">/* codes to use with ssh_handle_packets*() */</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">/* Infinite timeout */</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#define SSH_TIMEOUT_INFINITE -1</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">/* Use the timeout defined by user if any. Mostly used with new connections */</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor">#define SSH_TIMEOUT_USER -2</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">/* Use the default timeout, depending on ssh_is_blocking() */</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor">#define SSH_TIMEOUT_DEFAULT -3</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">/* Don't block at all */</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#define SSH_TIMEOUT_NONBLOCKING 0</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">/* options flags */</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">/* Authentication with *** allowed */</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor">#define SSH_OPT_FLAG_PASSWORD_AUTH 0x1</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#define SSH_OPT_FLAG_PUBKEY_AUTH 0x2</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="preprocessor">#define SSH_OPT_FLAG_KBDINT_AUTH 0x4</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#define SSH_OPT_FLAG_GSSAPI_AUTH 0x8</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment">/* extensions flags */</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment">/* negotiation enabled */</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor">#define SSH_EXT_NEGOTIATION 0x01</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">/* server-sig-algs extension */</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#define SSH_EXT_SIG_RSA_SHA256 0x02</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor">#define SSH_EXT_SIG_RSA_SHA512 0x04</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">/* members that are common to ssh_session and ssh_bind */</span></div><div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="structssh__common__struct.html"> 114</a></span> <span class="keyword">struct </span><a class="code" href="structssh__common__struct.html">ssh_common_struct</a> {</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">struct </span><a class="code" href="structerror__struct.html">error_struct</a> error;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="structssh__callbacks__struct.html">ssh_callbacks</a> callbacks; <span class="comment">/* Callbacks to user functions */</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">int</span> log_verbosity; <span class="comment">/* verbosity of the log functions */</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> };</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="structssh__session__struct.html"> 120</a></span> <span class="keyword">struct </span><a class="code" href="structssh__session__struct.html">ssh_session_struct</a> {</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">struct </span><a class="code" href="structssh__common__struct.html">ssh_common_struct</a> common;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">struct </span><a class="code" href="structssh__socket__struct.html">ssh_socket_struct</a> *socket;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordtype">char</span> *serverbanner;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordtype">char</span> *clientbanner;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordtype">int</span> protoversion;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordtype">int</span> server;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordtype">int</span> client;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">int</span> openssh;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  uint32_t send_seq;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  uint32_t recv_seq;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keyword">struct </span><a class="code" href="structssh__timestamp.html">ssh_timestamp</a> last_rekey_time;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordtype">int</span> connected;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">/* !=0 when the user got a session handle */</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordtype">int</span> alive;</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">/* two previous are deprecated */</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">/* int auth_service_asked; */</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="comment">/* session flags (SSH_SESSION_FLAG_*) */</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">int</span> flags;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">/* Extensions negotiated using RFC 8308 */</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  uint32_t extensions;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <a class="code" href="structssh__string__struct.html">ssh_string</a> banner; <span class="comment">/* that's the issue banner from the server */</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">char</span> *discon_msg; <span class="comment">/* disconnect message from the remote host */</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <a class="code" href="structssh__buffer__struct.html">ssh_buffer</a> in_buffer;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <a class="code" href="structpacket__struct.html">PACKET</a> in_packet;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <a class="code" href="structssh__buffer__struct.html">ssh_buffer</a> out_buffer;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">struct </span><a class="code" href="structssh__list.html">ssh_list</a> *out_queue; <span class="comment">/* This list is used for delaying packets</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> when rekeying is required */</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">/* the states are used by the nonblocking stuff to remember */</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="comment">/* where it was before being interrupted */</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">enum</span> ssh_pending_call_e pending_call_state;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">enum</span> ssh_session_state_e session_state;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keyword">enum</span> ssh_packet_state_e packet_state;</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">enum</span> ssh_dh_state_e dh_handshake_state;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keyword">enum</span> ssh_channel_request_state_e global_req_state;</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">struct </span><a class="code" href="structssh__agent__state__struct.html">ssh_agent_state_struct</a> *agent_state;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">struct </span>{</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">struct </span><a class="code" href="structssh__auth__auto__state__struct.html">ssh_auth_auto_state_struct</a> *auto_state;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">enum</span> ssh_auth_service_state_e service_state;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">enum</span> ssh_auth_state_e state;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  uint32_t supported_methods;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  uint32_t current_method;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  } auth;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="comment">/* Sending this flag before key exchange to save one round trip during the</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> * key exchange. This might make sense on high-latency connections.</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"> * So far internal only for testing. Usable only on the client side --</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * there is no key exchange method that would start with server message */</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordtype">bool</span> send_first_kex_follows;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="comment">/*</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * RFC 4253, 7.1: if the first_kex_packet_follows flag was set in</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * the received SSH_MSG_KEXINIT, but the guess was wrong, this</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * field will be set such that the following guessed packet will</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * be ignored on the receiving side. Once that packet has been received and</span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> * ignored, this field is cleared.</span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * On the sending side, this is set after we got peer KEXINIT message and we</span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * need to resend the initial message of the negotiated KEX algorithm.</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> */</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">bool</span> first_kex_follows_guess_wrong;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="structssh__buffer__struct.html">ssh_buffer</a> in_hashbuf;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <a class="code" href="structssh__buffer__struct.html">ssh_buffer</a> out_hashbuf;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">struct </span><a class="code" href="structssh__crypto__struct.html">ssh_crypto_struct</a> *current_crypto;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="comment">/* next_crypto is going to be used after a SSH2_MSG_NEWKEYS */</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keyword">struct </span><a class="code" href="structssh__crypto__struct.html">ssh_crypto_struct</a> *next_crypto;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keyword">struct </span><a class="code" href="structssh__list.html">ssh_list</a> *channels; <span class="comment">/* linked list of channels */</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordtype">int</span> maxchannel;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <a class="code" href="structssh__agent__struct.html">ssh_agent</a> agent; <span class="comment">/* ssh agent */</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">/* keyboard interactive data */</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keyword">struct </span><a class="code" href="structssh__kbdint__struct.html">ssh_kbdint_struct</a> *kbdint;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keyword">struct </span><a class="code" href="structssh__gssapi__struct.html">ssh_gssapi_struct</a> *gssapi;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">/* server host keys */</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keyword">struct </span>{</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <a class="code" href="structssh__key__struct.html">ssh_key</a> rsa_key;</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <a class="code" href="structssh__key__struct.html">ssh_key</a> dsa_key;</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <a class="code" href="structssh__key__struct.html">ssh_key</a> ecdsa_key;</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <a class="code" href="structssh__key__struct.html">ssh_key</a> ed25519_key;</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">/* The type of host key wanted by client */</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keyword">enum</span> ssh_keytypes_e hostkey;</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keyword">enum</span> ssh_digest_e hostkey_digest;</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  } srv;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">/* auths accepted by server */</span></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">struct </span><a class="code" href="structssh__list.html">ssh_list</a> *ssh_message_list; <span class="comment">/* list of delayed SSH messages */</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  int (*ssh_message_callback)(<span class="keyword">struct </span><a class="code" href="structssh__session__struct.html">ssh_session_struct</a> *session,</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <a class="code" href="structssh__message__struct.html">ssh_message</a> msg, <span class="keywordtype">void</span> *userdata);</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordtype">void</span> *ssh_message_callback_data;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <a class="code" href="structssh__server__callbacks__struct.html">ssh_server_callbacks</a> server_callbacks;</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  void (*ssh_connection_callback)( <span class="keyword">struct </span><a class="code" href="structssh__session__struct.html">ssh_session_struct</a> *session);</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keyword">struct </span><a class="code" href="structssh__packet__callbacks__struct.html">ssh_packet_callbacks_struct</a> default_packet_callbacks;</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">struct </span><a class="code" href="structssh__list.html">ssh_list</a> *packet_callbacks;</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keyword">struct </span><a class="code" href="structssh__socket__callbacks__struct.html">ssh_socket_callbacks_struct</a> socket_callbacks;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <a class="code" href="structssh__poll__ctx__struct.html">ssh_poll_ctx</a> default_poll_ctx;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">/* options */</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor">#ifdef WITH_PCAP</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  ssh_pcap_context pcap_ctx; <span class="comment">/* pcap debugging context */</span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">struct </span>{</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keyword">struct </span><a class="code" href="structssh__list.html">ssh_list</a> *identity;</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordtype">char</span> *username;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordtype">char</span> *host;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordtype">char</span> *bindaddr; <span class="comment">/* bind the client to an ip addr */</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordtype">char</span> *sshdir;</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordtype">char</span> *knownhosts;</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordtype">char</span> *global_knownhosts;</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">char</span> *wanted_methods[SSH_KEX_METHODS];</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordtype">char</span> *pubkey_accepted_types;</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordtype">char</span> *ProxyCommand;</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordtype">char</span> *custombanner;</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeout; <span class="comment">/* seconds */</span></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> timeout_usec;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> port;</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  socket_t fd;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordtype">int</span> StrictHostKeyChecking;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordtype">char</span> compressionlevel;</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordtype">char</span> *gss_server_identity;</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordtype">char</span> *gss_client_identity;</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordtype">int</span> gss_delegate_creds;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordtype">int</span> flags;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordtype">int</span> nodelay;</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordtype">bool</span> config_processed;</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  uint8_t options_seen[SOC_MAX];</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  uint64_t rekey_data;</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  uint32_t rekey_time;</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  } opts;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="comment">/* counters */</span></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <a class="code" href="structssh__counter__struct.html">ssh_counter</a> socket_counter;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <a class="code" href="structssh__counter__struct.html">ssh_counter</a> raw_counter;</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> };</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="keyword">typedef</span> int (*ssh_termination_function)(<span class="keywordtype">void</span> *user);</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="keywordtype">int</span> ssh_handle_packets(<a class="code" href="structssh__session__struct.html">ssh_session</a> session, <span class="keywordtype">int</span> timeout);</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="keywordtype">int</span> ssh_handle_packets_termination(<a class="code" href="structssh__session__struct.html">ssh_session</a> session,</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordtype">long</span> timeout,</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  ssh_termination_function fct,</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordtype">void</span> *user);</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="keywordtype">void</span> ssh_socket_exception_callback(<span class="keywordtype">int</span> code, <span class="keywordtype">int</span> errno_code, <span class="keywordtype">void</span> *user);</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="preprocessor">#endif </span><span class="comment">/* SESSION_H_ */</span><span class="preprocessor"></span></div><div class="ttc" id="structssh__key__struct_html"><div class="ttname"><a href="structssh__key__struct.html">ssh_key_struct</a></div><div class="ttdef"><b>Definition:</b> pki.h:50</div></div>
<div class="ttc" id="structssh__socket__callbacks__struct_html"><div class="ttname"><a href="structssh__socket__callbacks__struct.html">ssh_socket_callbacks_struct</a></div><div class="ttdef"><b>Definition:</b> callbacks.h:378</div></div>
<div class="ttc" id="structssh__kbdint__struct_html"><div class="ttname"><a href="structssh__kbdint__struct.html">ssh_kbdint_struct</a></div><div class="ttdef"><b>Definition:</b> auth.h:37</div></div>
<div class="ttc" id="structssh__crypto__struct_html"><div class="ttname"><a href="structssh__crypto__struct.html">ssh_crypto_struct</a></div><div class="ttdef"><b>Definition:</b> crypto.h:106</div></div>
<div class="ttc" id="structssh__agent__struct_html"><div class="ttname"><a href="structssh__agent__struct.html">ssh_agent_struct</a></div><div class="ttdef"><b>Definition:</b> agent.h:73</div></div>
<div class="ttc" id="structssh__callbacks__struct_html"><div class="ttname"><a href="structssh__callbacks__struct.html">ssh_callbacks_struct</a></div><div class="ttdef"><b>Definition:</b> callbacks.h:142</div></div>
<div class="ttc" id="structssh__message__struct_html"><div class="ttname"><a href="structssh__message__struct.html">ssh_message_struct</a></div><div class="ttdef"><b>Definition:</b> messages.h:84</div></div>
<div class="ttc" id="structssh__poll__ctx__struct_html"><div class="ttname"><a href="structssh__poll__ctx__struct.html">ssh_poll_ctx_struct</a></div><div class="ttdef"><b>Definition:</b> poll.c:76</div></div>
<div class="ttc" id="structssh__packet__callbacks__struct_html"><div class="ttname"><a href="structssh__packet__callbacks__struct.html">ssh_packet_callbacks_struct</a></div><div class="ttdef"><b>Definition:</b> callbacks.h:530</div></div>
<div class="ttc" id="structssh__session__struct_html"><div class="ttname"><a href="structssh__session__struct.html">ssh_session_struct</a></div><div class="ttdef"><b>Definition:</b> session.h:120</div></div>
<div class="ttc" id="structssh__gssapi__struct_html"><div class="ttname"><a href="structssh__gssapi__struct.html">ssh_gssapi_struct</a></div><div class="ttdef"><b>Definition:</b> gssapi.c:48</div></div>
<div class="ttc" id="structpacket__struct_html"><div class="ttname"><a href="structpacket__struct.html">packet_struct</a></div><div class="ttdef"><b>Definition:</b> packet.h:29</div></div>
<div class="ttc" id="structssh__auth__auto__state__struct_html"><div class="ttname"><a href="structssh__auth__auto__state__struct.html">ssh_auth_auto_state_struct</a></div><div class="ttdef"><b>Definition:</b> auth.c:971</div></div>
<div class="ttc" id="structssh__list_html"><div class="ttname"><a href="structssh__list.html">ssh_list</a></div><div class="ttdef"><b>Definition:</b> misc.h:39</div></div>
<div class="ttc" id="structssh__server__callbacks__struct_html"><div class="ttname"><a href="structssh__server__callbacks__struct.html">ssh_server_callbacks_struct</a></div><div class="ttdef"><b>Definition:</b> callbacks.h:304</div></div>
<div class="ttc" id="structssh__string__struct_html"><div class="ttname"><a href="structssh__string__struct.html">ssh_string_struct</a></div><div class="ttdef"><b>Definition:</b> string.h:29</div></div>
<div class="ttc" id="structssh__agent__state__struct_html"><div class="ttname"><a href="structssh__agent__state__struct.html">ssh_agent_state_struct</a></div><div class="ttdef"><b>Definition:</b> auth.c:833</div></div>
<div class="ttc" id="structssh__timestamp_html"><div class="ttname"><a href="structssh__timestamp.html">ssh_timestamp</a></div><div class="ttdef"><b>Definition:</b> misc.h:49</div></div>
<div class="ttc" id="structerror__struct_html"><div class="ttname"><a href="structerror__struct.html">error_struct</a></div><div class="ttdef"><b>Definition:</b> priv.h:256</div></div>
<div class="ttc" id="structssh__socket__struct_html"><div class="ttname"><a href="structssh__socket__struct.html">ssh_socket_struct</a></div><div class="ttdef"><b>Definition:</b> socket.c:78</div></div>
<div class="ttc" id="structssh__common__struct_html"><div class="ttname"><a href="structssh__common__struct.html">ssh_common_struct</a></div><div class="ttdef"><b>Definition:</b> session.h:114</div></div>
<div class="ttc" id="structssh__buffer__struct_html"><div class="ttname"><a href="structssh__buffer__struct.html">ssh_buffer_struct</a></div><div class="ttdef"><b>Definition:</b> buffer.c:47</div></div>
<div class="ttc" id="structssh__counter__struct_html"><div class="ttname"><a href="structssh__counter__struct.html">ssh_counter_struct</a></div><div class="ttdef"><b>Definition:</b> libssh.h:93</div></div>
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