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 <span id="projectnumber">0.9.6</span>
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<div id="projectbrief">The SSH library</div>
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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) 2003-2009 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="comment">/*</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * crypto.h is an include file for internal cryptographic structures of libssh</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> */</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">#ifndef _CRYPTO_H_</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#define _CRYPTO_H_</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <stdbool.h></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include "config.h"</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#ifdef HAVE_LIBGCRYPT</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <gcrypt.h></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#elif defined(HAVE_LIBMBEDCRYPTO)</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <mbedtls/gcm.h></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include "libssh/wrapper.h"</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#ifdef cbc_encrypt</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#undef cbc_encrypt</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#ifdef cbc_decrypt</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#undef cbc_decrypt</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#ifdef HAVE_OPENSSL_ECDH_H</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <openssl/ecdh.h></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include "libssh/dh.h"</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include "libssh/ecdh.h"</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include "libssh/kex.h"</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include "libssh/curve25519.h"</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#define DIGEST_MAX_LEN 64</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#define AES_GCM_TAGLEN 16</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#define AES_GCM_IVLEN 12</span></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> <span class="keyword">enum</span> ssh_key_exchange_e {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">/* diffie-hellman-group1-sha1 */</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  SSH_KEX_DH_GROUP1_SHA1=1,</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">/* diffie-hellman-group14-sha1 */</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  SSH_KEX_DH_GROUP14_SHA1,</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#ifdef WITH_GEX</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">/* diffie-hellman-group-exchange-sha1 */</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  SSH_KEX_DH_GEX_SHA1,</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">/* diffie-hellman-group-exchange-sha256 */</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  SSH_KEX_DH_GEX_SHA256,</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif </span><span class="comment">/* WITH_GEX */</span><span class="preprocessor"></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">/* ecdh-sha2-nistp256 */</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  SSH_KEX_ECDH_SHA2_NISTP256,</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">/* ecdh-sha2-nistp384 */</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  SSH_KEX_ECDH_SHA2_NISTP384,</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">/* ecdh-sha2-nistp521 */</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  SSH_KEX_ECDH_SHA2_NISTP521,</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">/* curve25519-sha256@libssh.org */</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  SSH_KEX_CURVE25519_SHA256_LIBSSH_ORG,</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="comment">/* curve25519-sha256 */</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  SSH_KEX_CURVE25519_SHA256,</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">/* diffie-hellman-group16-sha512 */</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  SSH_KEX_DH_GROUP16_SHA512,</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">/* diffie-hellman-group18-sha512 */</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  SSH_KEX_DH_GROUP18_SHA512,</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">/* diffie-hellman-group14-sha256 */</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  SSH_KEX_DH_GROUP14_SHA256,</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> };</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="keyword">enum</span> ssh_cipher_e {</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  SSH_NO_CIPHER=0,</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#ifdef WITH_BLOWFISH_CIPHER</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  SSH_BLOWFISH_CBC,</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#endif </span><span class="comment">/* WITH_BLOWFISH_CIPHER */</span><span class="preprocessor"></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  SSH_3DES_CBC,</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  SSH_AES128_CBC,</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  SSH_AES192_CBC,</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  SSH_AES256_CBC,</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  SSH_AES128_CTR,</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  SSH_AES192_CTR,</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  SSH_AES256_CTR,</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  SSH_AEAD_AES128_GCM,</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  SSH_AEAD_AES256_GCM,</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  SSH_AEAD_CHACHA20_POLY1305</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> };</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="keyword">struct </span><a class="code" href="structdh__ctx.html">dh_ctx</a>;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="structssh__crypto__struct.html"> 106</a></span> <span class="keyword">struct </span><a class="code" href="structssh__crypto__struct.html">ssh_crypto_struct</a> {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  bignum shared_secret;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">struct </span><a class="code" href="structdh__ctx.html">dh_ctx</a> *<a class="code" href="structdh__ctx.html">dh_ctx</a>;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#ifdef WITH_GEX</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">size_t</span> dh_pmin; <span class="keywordtype">size_t</span> dh_pn; <span class="keywordtype">size_t</span> dh_pmax; <span class="comment">/* preferred group parameters */</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor">#endif </span><span class="comment">/* WITH_GEX */</span><span class="preprocessor"></span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="preprocessor">#ifdef HAVE_ECDH</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor">#ifdef HAVE_OPENSSL_ECC</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  EC_KEY *ecdh_privkey;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="preprocessor">#elif defined HAVE_GCRYPT_ECC</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  gcry_sexp_t ecdh_privkey;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="preprocessor">#elif defined HAVE_LIBMBEDCRYPTO</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  mbedtls_ecp_keypair *ecdh_privkey;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <a class="code" href="structssh__string__struct.html">ssh_string</a> ecdh_client_pubkey;</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="structssh__string__struct.html">ssh_string</a> ecdh_server_pubkey;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#ifdef HAVE_CURVE25519</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  ssh_curve25519_privkey curve25519_privkey;</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  ssh_curve25519_pubkey curve25519_client_pubkey;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  ssh_curve25519_pubkey curve25519_server_pubkey;</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <a class="code" href="structssh__string__struct.html">ssh_string</a> dh_server_signature; <span class="comment">/* information used by dh_handshake. */</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordtype">size_t</span> session_id_len;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *session_id;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">size_t</span> digest_len; <span class="comment">/* len of the secret hash */</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *secret_hash; <span class="comment">/* Secret hash is same as session id until re-kex */</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *encryptIV;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *decryptIV;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *decryptkey;</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *encryptkey;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *encryptMAC;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *decryptMAC;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> hmacbuf[DIGEST_MAX_LEN];</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *in_cipher, *out_cipher; <span class="comment">/* the cipher structures/objects */</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keyword">enum</span> ssh_hmac_e in_hmac, out_hmac; <span class="comment">/* the MAC algorithms used */</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordtype">bool</span> in_hmac_etm, out_hmac_etm; <span class="comment">/* Whether EtM mode is used or not */</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> </div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <a class="code" href="structssh__key__struct.html">ssh_key</a> server_pubkey;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordtype">int</span> do_compress_out; <span class="comment">/* idem */</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">int</span> do_compress_in; <span class="comment">/* don't set them, set the option instead */</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">int</span> delayed_compress_in; <span class="comment">/* Use of zlib@openssh.org */</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordtype">int</span> delayed_compress_out;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordtype">void</span> *compress_out_ctx; <span class="comment">/* don't touch it */</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordtype">void</span> *compress_in_ctx; <span class="comment">/* really, don't */</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">/* kex sent by server, client, and mutually elected methods */</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">struct </span><a class="code" href="structssh__kex__struct.html">ssh_kex_struct</a> server_kex;</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">struct </span><a class="code" href="structssh__kex__struct.html">ssh_kex_struct</a> client_kex;</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordtype">char</span> *kex_methods[SSH_KEX_METHODS];</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">enum</span> ssh_key_exchange_e kex_type;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">enum</span> ssh_kdf_digest digest_type; <span class="comment">/* Digest type for session keys derivation */</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keyword">enum</span> ssh_crypto_direction_e used; <span class="comment">/* Is this crypto still used for either of directions? */</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> };</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div><div class="line"><a name="l00160"></a><span class="lineno"><a class="line" href="structssh__cipher__struct.html"> 160</a></span> <span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> {</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *name; <span class="comment">/* ssh name of the algorithm */</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> blocksize; <span class="comment">/* blocksize of the algo */</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">enum</span> ssh_cipher_e ciphertype;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  uint32_t lenfield_blocksize; <span class="comment">/* blocksize of the packet length field */</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">size_t</span> keylen; <span class="comment">/* length of the key structure */</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="preprocessor">#ifdef HAVE_LIBGCRYPT</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  gcry_cipher_hd_t *key;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> last_iv[AES_GCM_IVLEN];</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="preprocessor">#elif defined HAVE_LIBCRYPTO</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">struct </span>ssh_3des_key_schedule *des3_key;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keyword">struct </span>ssh_aes_key_schedule *aes_key;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">const</span> EVP_CIPHER *cipher;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  EVP_CIPHER_CTX *ctx;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="preprocessor">#elif defined HAVE_LIBMBEDCRYPTO</span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  mbedtls_cipher_context_t encrypt_ctx;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  mbedtls_cipher_context_t decrypt_ctx;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  mbedtls_cipher_type_t type;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#ifdef MBEDTLS_GCM_C</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  mbedtls_gcm_context gcm_ctx;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> last_iv[AES_GCM_IVLEN];</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="preprocessor">#endif </span><span class="comment">/* MBEDTLS_GCM_C */</span><span class="preprocessor"></span></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keyword">struct </span><a class="code" href="structchacha20__poly1305__keysched.html">chacha20_poly1305_keysched</a> *chacha20_schedule;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> keysize; <span class="comment">/* bytes of key used. != keylen */</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordtype">size_t</span> tag_size; <span class="comment">/* overhead required for tag */</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="comment">/* Counters for rekeying initialization */</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  uint32_t packets;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  uint64_t blocks;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="comment">/* Rekeying limit for the cipher or manually enforced */</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  uint64_t max_blocks;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">/* sets the new key for immediate use */</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  int (*set_encrypt_key)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher, <span class="keywordtype">void</span> *key, <span class="keywordtype">void</span> *IV);</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  int (*set_decrypt_key)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher, <span class="keywordtype">void</span> *key, <span class="keywordtype">void</span> *IV);</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  void (*encrypt)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher,</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordtype">void</span> *in,</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordtype">void</span> *out,</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordtype">size_t</span> len);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  void (*decrypt)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher,</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordtype">void</span> *in,</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordtype">void</span> *out,</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordtype">size_t</span> len);</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  void (*aead_encrypt)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher, <span class="keywordtype">void</span> *in, <span class="keywordtype">void</span> *out,</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordtype">size_t</span> len, uint8_t *mac, uint64_t seq);</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  int (*aead_decrypt_length)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher, <span class="keywordtype">void</span> *in,</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  uint8_t *out, <span class="keywordtype">size_t</span> len, uint64_t seq);</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  int (*aead_decrypt)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher, <span class="keywordtype">void</span> *complete_packet, uint8_t *out,</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordtype">size_t</span> encrypted_size, uint64_t seq);</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  void (*cleanup)(<span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *cipher);</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> };</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="keyword">const</span> <span class="keyword">struct </span><a class="code" href="structssh__cipher__struct.html">ssh_cipher_struct</a> *ssh_get_chacha20poly1305_cipher(<span class="keywordtype">void</span>);</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="keywordtype">int</span> sshkdf_derive_key(<span class="keyword">struct</span> <a class="code" href="structssh__crypto__struct.html">ssh_crypto_struct</a> *crypto,</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *key, <span class="keywordtype">size_t</span> key_len,</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordtype">int</span> key_type, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output,</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordtype">size_t</span> requested_len);</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="preprocessor">#endif </span><span class="comment">/* _CRYPTO_H_ */</span><span class="preprocessor"></span></div><div class="ttc" id="structssh__kex__struct_html"><div class="ttname"><a href="structssh__kex__struct.html">ssh_kex_struct</a></div><div class="ttdef"><b>Definition:</b> kex.h:29</div></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__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__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="structchacha20__poly1305__keysched_html"><div class="ttname"><a href="structchacha20__poly1305__keysched.html">chacha20_poly1305_keysched</a></div><div class="ttdef"><b>Definition:</b> chachapoly.c:32</div></div>
<div class="ttc" id="structssh__cipher__struct_html"><div class="ttname"><a href="structssh__cipher__struct.html">ssh_cipher_struct</a></div><div class="ttdef"><b>Definition:</b> crypto.h:160</div></div>
<div class="ttc" id="structdh__ctx_html"><div class="ttname"><a href="structdh__ctx.html">dh_ctx</a></div><div class="ttdef"><b>Definition:</b> dh_crypto.c:40</div></div>
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