Mercurial > dropbear
annotate packet.c @ 504:950c38b854a1
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author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 02 Nov 2008 12:01:39 +0000 |
parents | 43bbe17d6ba0 |
children | a3748e54273c |
rev | line source |
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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 "packet.h" |
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27 #include "session.h" |
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28 #include "dbutil.h" |
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29 #include "ssh.h" |
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30 #include "algo.h" |
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31 #include "buffer.h" |
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32 #include "kex.h" |
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33 #include "random.h" |
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34 #include "service.h" |
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35 #include "auth.h" |
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36 #include "channel.h" |
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37 |
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38 static void read_packet_init(); |
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39 static void writemac(buffer * outputbuffer, buffer * clearwritebuf); |
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40 static int checkmac(buffer* hashbuf, buffer* readbuf); |
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41 |
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42 #define ZLIB_COMPRESS_INCR 20 /* this is 12 bytes + 0.1% of 8000 bytes */ |
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43 #define ZLIB_DECOMPRESS_INCR 100 |
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44 #ifndef DISABLE_ZLIB |
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45 static buffer* buf_decompress(buffer* buf, unsigned int len); |
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46 static void buf_compress(buffer * dest, buffer * src, unsigned int len); |
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47 #endif |
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48 |
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49 /* non-blocking function writing out a current encrypted packet */ |
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50 void write_packet() { |
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51 |
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52 int len, written; |
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53 buffer * writebuf = NULL; |
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54 |
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55 TRACE(("enter write_packet")) |
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56 dropbear_assert(!isempty(&ses.writequeue)); |
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57 |
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58 /* Get the next buffer in the queue of encrypted packets to write*/ |
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59 writebuf = (buffer*)examine(&ses.writequeue); |
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60 |
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61 len = writebuf->len - writebuf->pos; |
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62 dropbear_assert(len > 0); |
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63 /* Try to write as much as possible */ |
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64 written = write(ses.sock_out, buf_getptr(writebuf, len), len); |
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65 |
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66 if (written < 0) { |
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67 if (errno == EINTR) { |
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68 TRACE(("leave writepacket: EINTR")) |
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69 return; |
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70 } else { |
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71 dropbear_exit("error writing"); |
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72 } |
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73 } |
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74 |
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75 ses.last_packet_time = time(NULL); |
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76 |
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77 if (written == 0) { |
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79 } |
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80 |
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81 if (written == len) { |
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82 /* We've finished with the packet, free it */ |
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83 dequeue(&ses.writequeue); |
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84 buf_free(writebuf); |
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85 writebuf = NULL; |
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86 } else { |
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87 /* More packet left to write, leave it in the queue for later */ |
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88 buf_incrpos(writebuf, written); |
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89 } |
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90 |
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91 TRACE(("leave write_packet")) |
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92 } |
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93 |
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94 /* Non-blocking function reading available portion of a packet into the |
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95 * ses's buffer, decrypting the length if encrypted, decrypting the |
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96 * full portion if possible */ |
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97 void read_packet() { |
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98 |
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99 int len; |
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100 unsigned int maxlen; |
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101 unsigned char blocksize; |
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102 |
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103 TRACE(("enter read_packet")) |
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104 blocksize = ses.keys->recv_algo_crypt->blocksize; |
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105 |
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106 if (ses.readbuf == NULL || ses.readbuf->len < blocksize) { |
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107 /* In the first blocksize of a packet */ |
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108 |
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109 /* Read the first blocksize of the packet, so we can decrypt it and |
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110 * find the length of the whole packet */ |
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111 read_packet_init(); |
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112 |
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113 /* If we don't have the length of decryptreadbuf, we didn't read |
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114 * a whole blocksize and should exit */ |
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115 if (ses.decryptreadbuf->len == 0) { |
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116 TRACE(("leave read_packet: packetinit done")) |
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117 return; |
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118 } |
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119 } |
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120 |
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121 /* Attempt to read the remainder of the packet, note that there |
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122 * mightn't be any available (EAGAIN) */ |
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123 dropbear_assert(ses.readbuf != NULL); |
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124 maxlen = ses.readbuf->len - ses.readbuf->pos; |
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125 len = read(ses.sock_in, buf_getptr(ses.readbuf, maxlen), maxlen); |
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126 |
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127 if (len == 0) { |
33 | 128 ses.remoteclosed(); |
27
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129 } |
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130 |
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131 if (len < 0) { |
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132 if (errno == EINTR || errno == EAGAIN) { |
165
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133 TRACE(("leave read_packet: EINTR or EAGAIN")) |
27
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134 return; |
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135 } else { |
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136 dropbear_exit("error reading: %s", strerror(errno)); |
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137 } |
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138 } |
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139 |
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140 buf_incrpos(ses.readbuf, len); |
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141 |
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142 if ((unsigned int)len == maxlen) { |
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143 /* The whole packet has been read */ |
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144 decrypt_packet(); |
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145 /* The main select() loop process_packet() to |
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146 * handle the packet contents... */ |
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147 } |
165
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148 TRACE(("leave read_packet")) |
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149 } |
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150 |
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151 /* Function used to read the initial portion of a packet, and determine the |
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152 * length. Only called during the first BLOCKSIZE of a packet. */ |
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153 static void read_packet_init() { |
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154 |
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155 unsigned int maxlen; |
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156 int len; |
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157 unsigned char blocksize; |
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158 unsigned char macsize; |
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159 |
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160 |
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161 blocksize = ses.keys->recv_algo_crypt->blocksize; |
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162 macsize = ses.keys->recv_algo_mac->hashsize; |
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163 |
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164 if (ses.readbuf == NULL) { |
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165 /* start of a new packet */ |
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166 ses.readbuf = buf_new(INIT_READBUF); |
241
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167 dropbear_assert(ses.decryptreadbuf == NULL); |
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168 ses.decryptreadbuf = buf_new(blocksize); |
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169 } |
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170 |
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171 maxlen = blocksize - ses.readbuf->pos; |
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172 |
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173 /* read the rest of the packet if possible */ |
479
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174 len = read(ses.sock_in, buf_getwriteptr(ses.readbuf, maxlen), |
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175 maxlen); |
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176 if (len == 0) { |
33 | 177 ses.remoteclosed(); |
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178 } |
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179 if (len < 0) { |
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180 if (errno == EINTR) { |
165
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181 TRACE(("leave read_packet_init: EINTR")) |
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182 return; |
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183 } |
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184 dropbear_exit("error reading: %s", strerror(errno)); |
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185 } |
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186 |
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187 buf_incrwritepos(ses.readbuf, len); |
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188 |
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189 if ((unsigned int)len != maxlen) { |
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190 /* don't have enough bytes to determine length, get next time */ |
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191 return; |
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192 } |
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193 |
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194 /* now we have the first block, need to get packet length, so we decrypt |
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195 * the first block (only need first 4 bytes) */ |
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196 buf_setpos(ses.readbuf, 0); |
502 | 197 if (ses.keys->recv_crypt_mode->decrypt(buf_getptr(ses.readbuf, blocksize), |
198 buf_getwriteptr(ses.decryptreadbuf,blocksize), | |
199 blocksize, | |
200 &ses.keys->recv_cipher_state) != CRYPT_OK) { | |
201 dropbear_exit("error decrypting"); | |
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202 } |
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203 buf_setlen(ses.decryptreadbuf, blocksize); |
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204 len = buf_getint(ses.decryptreadbuf) + 4 + macsize; |
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205 |
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206 buf_setpos(ses.readbuf, blocksize); |
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207 |
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208 /* check packet length */ |
448
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209 if ((len > RECV_MAX_PACKET_LEN) || |
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210 (len < MIN_PACKET_LEN + macsize) || |
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211 ((len - macsize) % blocksize != 0)) { |
228
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194
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212 dropbear_exit("bad packet size %d", len); |
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213 } |
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214 |
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215 buf_resize(ses.readbuf, len); |
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216 buf_setlen(ses.readbuf, len); |
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217 |
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218 } |
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219 |
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220 /* handle the received packet */ |
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221 void decrypt_packet() { |
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222 |
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223 unsigned char blocksize; |
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224 unsigned char macsize; |
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225 unsigned int padlen; |
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226 unsigned int len; |
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227 |
165
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228 TRACE(("enter decrypt_packet")) |
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229 blocksize = ses.keys->recv_algo_crypt->blocksize; |
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230 macsize = ses.keys->recv_algo_mac->hashsize; |
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231 |
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232 ses.kexstate.datarecv += ses.readbuf->len; |
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233 |
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234 /* we've already decrypted the first blocksize in read_packet_init */ |
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235 buf_setpos(ses.readbuf, blocksize); |
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236 |
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237 buf_resize(ses.decryptreadbuf, ses.readbuf->len - macsize); |
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238 buf_setlen(ses.decryptreadbuf, ses.decryptreadbuf->size); |
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239 buf_setpos(ses.decryptreadbuf, blocksize); |
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240 |
502 | 241 /* decrypt it */ |
242 while (ses.readbuf->pos < ses.readbuf->len - macsize) { | |
243 if (ses.keys->recv_crypt_mode->decrypt( | |
244 buf_getptr(ses.readbuf, blocksize), | |
245 buf_getwriteptr(ses.decryptreadbuf, blocksize), | |
246 blocksize, | |
247 &ses.keys->recv_cipher_state) != CRYPT_OK) { | |
248 dropbear_exit("error decrypting"); | |
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249 } |
502 | 250 buf_incrpos(ses.readbuf, blocksize); |
251 buf_incrwritepos(ses.decryptreadbuf, blocksize); | |
27
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252 } |
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253 |
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254 /* check the hmac */ |
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255 buf_setpos(ses.readbuf, ses.readbuf->len - macsize); |
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256 if (checkmac(ses.readbuf, ses.decryptreadbuf) != DROPBEAR_SUCCESS) { |
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257 dropbear_exit("Integrity error"); |
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258 } |
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259 |
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260 /* readbuf no longer required */ |
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261 buf_free(ses.readbuf); |
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262 ses.readbuf = NULL; |
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263 |
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264 /* get padding length */ |
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265 buf_setpos(ses.decryptreadbuf, PACKET_PADDING_OFF); |
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266 padlen = buf_getbyte(ses.decryptreadbuf); |
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267 |
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|
268 /* payload length */ |
08da099e8337
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parents:
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|
269 /* - 4 - 1 is for LEN and PADLEN values */ |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
270 len = ses.decryptreadbuf->len - padlen - 4 - 1; |
448
9c61e7af0156
Rearrange the channel buffer sizes into three neat use-editable values in
Matt Johnston <matt@ucc.asn.au>
parents:
426
diff
changeset
|
271 if ((len > RECV_MAX_PAYLOAD_LEN) || (len < 1)) { |
27
08da099e8337
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parents:
diff
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|
272 dropbear_exit("bad packet size"); |
08da099e8337
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parents:
diff
changeset
|
273 } |
08da099e8337
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parents:
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|
274 |
08da099e8337
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parents:
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|
275 buf_setpos(ses.decryptreadbuf, PACKET_PAYLOAD_OFF); |
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|
276 |
08da099e8337
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diff
changeset
|
277 #ifndef DISABLE_ZLIB |
501
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
278 if (is_compress_recv()) { |
27
08da099e8337
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diff
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|
279 /* decompress */ |
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parents:
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280 ses.payload = buf_decompress(ses.decryptreadbuf, len); |
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parents:
diff
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|
281 } else |
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parents:
diff
changeset
|
282 #endif |
08da099e8337
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parents:
diff
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|
283 { |
08da099e8337
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parents:
diff
changeset
|
284 /* copy payload */ |
08da099e8337
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parents:
diff
changeset
|
285 ses.payload = buf_new(len); |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
286 memcpy(ses.payload->data, buf_getptr(ses.decryptreadbuf, len), len); |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
287 buf_incrlen(ses.payload, len); |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
288 } |
08da099e8337
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parents:
diff
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|
289 |
08da099e8337
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parents:
diff
changeset
|
290 buf_free(ses.decryptreadbuf); |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
291 ses.decryptreadbuf = NULL; |
08da099e8337
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parents:
diff
changeset
|
292 buf_setpos(ses.payload, 0); |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
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changeset
|
293 |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
294 ses.recvseq++; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
295 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
296 TRACE(("leave decrypt_packet")) |
27
08da099e8337
- Rename common-packet.c to packet.c
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changeset
|
297 } |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
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|
298 |
08da099e8337
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parents:
diff
changeset
|
299 /* Checks the mac in hashbuf, for the data in readbuf. |
08da099e8337
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parents:
diff
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|
300 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
301 static int checkmac(buffer* macbuf, buffer* sourcebuf) { |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
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|
302 |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
303 unsigned int macsize; |
27
08da099e8337
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
304 hmac_state hmac; |
08da099e8337
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parents:
diff
changeset
|
305 unsigned char tempbuf[MAX_MAC_LEN]; |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
306 unsigned long bufsize; |
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
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parents:
194
diff
changeset
|
307 unsigned int len; |
27
08da099e8337
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parents:
diff
changeset
|
308 |
08da099e8337
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
309 macsize = ses.keys->recv_algo_mac->hashsize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
310 if (macsize == 0) { |
08da099e8337
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parents:
diff
changeset
|
311 return DROPBEAR_SUCCESS; |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
312 } |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
313 |
08da099e8337
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parents:
diff
changeset
|
314 /* calculate the mac */ |
08da099e8337
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parents:
diff
changeset
|
315 if (hmac_init(&hmac, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
316 find_hash(ses.keys->recv_algo_mac->hashdesc->name), |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
317 ses.keys->recvmackey, |
08da099e8337
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parents:
diff
changeset
|
318 ses.keys->recv_algo_mac->keysize) |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
319 != CRYPT_OK) { |
08da099e8337
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parents:
diff
changeset
|
320 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
321 } |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
322 |
08da099e8337
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
323 /* sequence number */ |
08da099e8337
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
324 STORE32H(ses.recvseq, tempbuf); |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
325 if (hmac_process(&hmac, tempbuf, 4) != CRYPT_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
326 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
327 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
328 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
329 buf_setpos(sourcebuf, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
330 len = sourcebuf->len; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
331 if (hmac_process(&hmac, buf_getptr(sourcebuf, len), len) != CRYPT_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
332 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
333 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
334 |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
335 bufsize = sizeof(tempbuf); |
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
336 if (hmac_done(&hmac, tempbuf, &bufsize) != CRYPT_OK) { |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
337 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
338 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
339 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
340 /* compare the hash */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
341 if (memcmp(tempbuf, buf_getptr(macbuf, macsize), macsize) != 0) { |
08da099e8337
- Rename common-packet.c to packet.c
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parents:
diff
changeset
|
342 return DROPBEAR_FAILURE; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
343 } else { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
344 return DROPBEAR_SUCCESS; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
345 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
346 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
347 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
348 #ifndef DISABLE_ZLIB |
08da099e8337
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
349 /* returns a pointer to a newly created buffer */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
350 static buffer* buf_decompress(buffer* buf, unsigned int len) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
351 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
352 int result; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
353 buffer * ret; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
354 z_streamp zstream; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
355 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
356 zstream = ses.keys->recv_zstream; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
357 ret = buf_new(len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
358 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
359 zstream->avail_in = len; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
360 zstream->next_in = buf_getptr(buf, len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
361 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
362 /* decompress the payload, incrementally resizing the output buffer */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
363 while (1) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
364 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
365 zstream->avail_out = ret->size - ret->pos; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
366 zstream->next_out = buf_getwriteptr(ret, zstream->avail_out); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
367 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
368 result = inflate(zstream, Z_SYNC_FLUSH); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
369 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
370 buf_setlen(ret, ret->size - zstream->avail_out); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
371 buf_setpos(ret, ret->len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
372 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
373 if (result != Z_BUF_ERROR && result != Z_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
374 dropbear_exit("zlib error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
375 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
376 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
377 if (zstream->avail_in == 0 && |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
378 (zstream->avail_out != 0 || result == Z_BUF_ERROR)) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
379 /* we can only exit if avail_out hasn't all been used, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
380 * and there's no remaining input */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
381 return ret; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
382 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
383 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
384 if (zstream->avail_out == 0) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
385 buf_resize(ret, ret->size + ZLIB_DECOMPRESS_INCR); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
386 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
387 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
388 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
389 #endif |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
390 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
391 |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
392 /* returns 1 if the packet is a valid type during kex (see 7.1 of rfc4253) */ |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
393 static int packet_is_okay_kex(unsigned char type) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
394 if (type >= SSH_MSG_USERAUTH_REQUEST) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
395 return 0; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
396 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
397 if (type == SSH_MSG_SERVICE_REQUEST || type == SSH_MSG_SERVICE_ACCEPT) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
398 return 0; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
399 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
400 if (type == SSH_MSG_KEXINIT) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
401 /* XXX should this die horribly if !dataallowed ?? */ |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
402 return 0; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
403 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
404 return 1; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
405 } |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
406 |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
407 static void enqueue_reply_packet() { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
408 struct packetlist * new_item = NULL; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
409 new_item = m_malloc(sizeof(struct packetlist)); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
410 new_item->next = NULL; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
411 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
412 new_item->payload = buf_newcopy(ses.writepayload); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
413 buf_setpos(ses.writepayload, 0); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
414 buf_setlen(ses.writepayload, 0); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
415 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
416 if (ses.reply_queue_tail) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
417 ses.reply_queue_tail->next = new_item; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
418 } else { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
419 ses.reply_queue_head = new_item; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
420 } |
456
f6c999ba31da
Fix delayed packet queue handling
Matt Johnston <matt@ucc.asn.au>
parents:
454
diff
changeset
|
421 ses.reply_queue_tail = new_item; |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
422 TRACE(("leave enqueue_reply_packet")) |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
423 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
424 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
425 void maybe_flush_reply_queue() { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
426 struct packetlist *tmp_item = NULL, *curr_item = NULL; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
427 if (!ses.dataallowed) |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
428 { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
429 TRACE(("maybe_empty_reply_queue - no data allowed")) |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
430 return; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
431 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
432 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
433 for (curr_item = ses.reply_queue_head; curr_item; ) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
434 CHECKCLEARTOWRITE(); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
435 buf_putbytes(ses.writepayload, |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
436 curr_item->payload->data, curr_item->payload->len); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
437 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
438 buf_free(curr_item->payload); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
439 tmp_item = curr_item; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
440 curr_item = curr_item->next; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
441 m_free(tmp_item); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
442 encrypt_packet(); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
443 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
444 ses.reply_queue_head = ses.reply_queue_tail = NULL; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
445 } |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
446 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
447 /* encrypt the writepayload, putting into writebuf, ready for write_packet() |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
448 * to put on the wire */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
449 void encrypt_packet() { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
450 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
451 unsigned char padlen; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
452 unsigned char blocksize, macsize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
453 buffer * writebuf; /* the packet which will go on the wire */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
454 buffer * clearwritebuf; /* unencrypted, possibly compressed */ |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
455 unsigned char type; |
501
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
456 unsigned int clear_len; |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
457 |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
458 type = ses.writepayload->data[0]; |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
459 TRACE(("enter encrypt_packet()")) |
452
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
460 TRACE(("encrypt_packet type is %d", type)) |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
461 |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
462 if (!ses.dataallowed && !packet_is_okay_kex(type)) { |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
463 /* During key exchange only particular packets are allowed. |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
464 Since this type isn't OK we just enqueue it to send |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
465 after the KEX, see maybe_flush_reply_queue */ |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
466 enqueue_reply_packet(); |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
467 return; |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
468 } |
4cab61369879
Prevent invalid packets being sent during key-exchange, instead queue
Matt Johnston <matt@ucc.asn.au>
parents:
448
diff
changeset
|
469 |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
470 blocksize = ses.keys->trans_algo_crypt->blocksize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
471 macsize = ses.keys->trans_algo_mac->hashsize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
472 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
473 /* Encrypted packet len is payload+5, then worst case is if we are 3 away |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
474 * from a blocksize multiple. In which case we need to pad to the |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
475 * multiple, then add another blocksize (or MIN_PACKET_LEN) */ |
501
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
476 clear_len = (ses.writepayload->len+4+1) + MIN_PACKET_LEN + 3; |
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
477 |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
478 #ifndef DISABLE_ZLIB |
501
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
479 clear_len += ZLIB_COMPRESS_INCR; /* bit of a kludge, but we can't know len*/ |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
480 #endif |
501
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
481 clearwritebuf = buf_new(clear_len); |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
482 buf_setlen(clearwritebuf, PACKET_PAYLOAD_OFF); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
483 buf_setpos(clearwritebuf, PACKET_PAYLOAD_OFF); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
484 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
485 buf_setpos(ses.writepayload, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
486 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
487 #ifndef DISABLE_ZLIB |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
488 /* compression */ |
501
d58c478bd399
Add support for [email protected] delayed compression.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
489 if (is_compress_trans()) { |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
490 buf_compress(clearwritebuf, ses.writepayload, ses.writepayload->len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
491 } else |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
492 #endif |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
493 { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
494 memcpy(buf_getwriteptr(clearwritebuf, ses.writepayload->len), |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
495 buf_getptr(ses.writepayload, ses.writepayload->len), |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
496 ses.writepayload->len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
497 buf_incrwritepos(clearwritebuf, ses.writepayload->len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
498 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
499 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
500 /* finished with payload */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
501 buf_setpos(ses.writepayload, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
502 buf_setlen(ses.writepayload, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
503 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
504 /* length of padding - packet length must be a multiple of blocksize, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
505 * with a minimum of 4 bytes of padding */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
506 padlen = blocksize - (clearwritebuf->len) % blocksize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
507 if (padlen < 4) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
508 padlen += blocksize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
509 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
510 /* check for min packet length */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
511 if (clearwritebuf->len + padlen < MIN_PACKET_LEN) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
512 padlen += blocksize; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
513 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
514 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
515 buf_setpos(clearwritebuf, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
516 /* packet length excluding the packetlength uint32 */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
517 buf_putint(clearwritebuf, clearwritebuf->len + padlen - 4); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
518 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
519 /* padding len */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
520 buf_putbyte(clearwritebuf, padlen); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
521 /* actual padding */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
522 buf_setpos(clearwritebuf, clearwritebuf->len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
523 buf_incrlen(clearwritebuf, padlen); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
524 genrandom(buf_getptr(clearwritebuf, padlen), padlen); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
525 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
526 /* do the actual encryption */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
527 buf_setpos(clearwritebuf, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
528 /* create a new writebuffer, this is freed when it has been put on the |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
529 * wire by writepacket() */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
530 writebuf = buf_new(clearwritebuf->len + macsize); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
531 |
502 | 532 /* encrypt it */ |
533 while (clearwritebuf->pos < clearwritebuf->len) { | |
534 if (ses.keys->trans_crypt_mode->encrypt( | |
535 buf_getptr(clearwritebuf, blocksize), | |
536 buf_getwriteptr(writebuf, blocksize), | |
537 blocksize, | |
538 &ses.keys->trans_cipher_state) != CRYPT_OK) { | |
539 dropbear_exit("error encrypting"); | |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
540 } |
502 | 541 buf_incrpos(clearwritebuf, blocksize); |
542 buf_incrwritepos(writebuf, blocksize); | |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
543 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
544 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
545 /* now add a hmac and we're done */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
546 writemac(writebuf, clearwritebuf); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
547 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
548 /* clearwritebuf is finished with */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
549 buf_free(clearwritebuf); |
70
b0316ce64e4b
Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
550 clearwritebuf = NULL; |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
551 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
552 /* enqueue the packet for sending */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
553 buf_setpos(writebuf, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
554 enqueue(&ses.writequeue, (void*)writebuf); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
555 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
556 /* Update counts */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
557 ses.kexstate.datatrans += writebuf->len; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
558 ses.transseq++; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
559 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
560 TRACE(("leave encrypt_packet()")) |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
561 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
562 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
563 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
564 /* Create the packet mac, and append H(seqno|clearbuf) to the output */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
565 static void writemac(buffer * outputbuffer, buffer * clearwritebuf) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
566 |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
567 unsigned int macsize; |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
568 unsigned char seqbuf[4]; |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
569 unsigned char tempbuf[MAX_MAC_LEN]; |
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
570 unsigned long bufsize; |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
571 hmac_state hmac; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
572 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
573 TRACE(("enter writemac")) |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
574 |
232
cbf1165d9386
trans, not recv for macsize
Matt Johnston <matt@ucc.asn.au>
parents:
228
diff
changeset
|
575 macsize = ses.keys->trans_algo_mac->hashsize; |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
576 if (macsize > 0) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
577 /* calculate the mac */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
578 if (hmac_init(&hmac, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
579 find_hash(ses.keys->trans_algo_mac->hashdesc->name), |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
580 ses.keys->transmackey, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
581 ses.keys->trans_algo_mac->keysize) != CRYPT_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
582 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
583 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
584 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
585 /* sequence number */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
586 STORE32H(ses.transseq, seqbuf); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
587 if (hmac_process(&hmac, seqbuf, 4) != CRYPT_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
588 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
589 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
590 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
591 /* the actual contents */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
592 buf_setpos(clearwritebuf, 0); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
593 if (hmac_process(&hmac, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
594 buf_getptr(clearwritebuf, |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
595 clearwritebuf->len), |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
596 clearwritebuf->len) != CRYPT_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
597 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
598 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
599 |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
600 bufsize = sizeof(tempbuf); |
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
601 if (hmac_done(&hmac, tempbuf, &bufsize) |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
602 != CRYPT_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
603 dropbear_exit("HMAC error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
604 } |
228
5e4110bb753a
- Fixed twofish algorithm naming so it actually works.
Matt Johnston <matt@ucc.asn.au>
parents:
194
diff
changeset
|
605 buf_putbytes(outputbuffer, tempbuf, macsize); |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
606 } |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
607 TRACE(("leave writemac")) |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
608 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
609 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
610 #ifndef DISABLE_ZLIB |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
611 /* compresses len bytes from src, outputting to dest (starting from the |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
612 * respective current positions. */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
613 static void buf_compress(buffer * dest, buffer * src, unsigned int len) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
614 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
615 unsigned int endpos = src->pos + len; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
616 int result; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
617 |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
618 TRACE(("enter buf_compress")) |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
619 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
620 while (1) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
621 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
622 ses.keys->trans_zstream->avail_in = endpos - src->pos; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
623 ses.keys->trans_zstream->next_in = |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
624 buf_getptr(src, ses.keys->trans_zstream->avail_in); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
625 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
626 ses.keys->trans_zstream->avail_out = dest->size - dest->pos; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
627 ses.keys->trans_zstream->next_out = |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
628 buf_getwriteptr(dest, ses.keys->trans_zstream->avail_out); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
629 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
630 result = deflate(ses.keys->trans_zstream, Z_SYNC_FLUSH); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
631 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
632 buf_setpos(src, endpos - ses.keys->trans_zstream->avail_in); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
633 buf_setlen(dest, dest->size - ses.keys->trans_zstream->avail_out); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
634 buf_setpos(dest, dest->len); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
635 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
636 if (result != Z_OK) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
637 dropbear_exit("zlib error"); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
638 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
639 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
640 if (ses.keys->trans_zstream->avail_in == 0) { |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
641 break; |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
642 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
643 |
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
232
diff
changeset
|
644 dropbear_assert(ses.keys->trans_zstream->avail_out == 0); |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
645 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
646 /* the buffer has been filled, we must extend. This only happens in |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
647 * unusual circumstances where the data grows in size after deflate(), |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
648 * but it is possible */ |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
649 buf_resize(dest, dest->size + ZLIB_COMPRESS_INCR); |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
650 |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
651 } |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
70
diff
changeset
|
652 TRACE(("leave buf_compress")) |
27
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
653 } |
08da099e8337
- Rename common-packet.c to packet.c
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
654 #endif |