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annotate common-algo.c @ 790:7bd88d546627

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Avoid segfault for locked accounts (invalid salt to crypt())
author Matt Johnston <matt@ucc.asn.au>
date Mon, 29 Apr 2013 23:42:37 +0800
parents 077bbe1eb220
children 7dcb46da72d9 3ca7113936c1
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1 /*
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2 * Dropbear SSH
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * Copyright (c) 2004 by Mihnea Stoenescu
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6 * All rights reserved.
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7 *
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8 * Permission is hereby granted, free of charge, to any person obtaining a copy
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9 * of this software and associated documentation files (the "Software"), to deal
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10 * in the Software without restriction, including without limitation the rights
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11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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12 * copies of the Software, and to permit persons to whom the Software is
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13 * furnished to do so, subject to the following conditions:
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14 *
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15 * The above copyright notice and this permission notice shall be included in
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16 * all copies or substantial portions of the Software.
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17 *
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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24 * SOFTWARE. */
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25
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26 #include "algo.h"
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27 #include "session.h"
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28 #include "dbutil.h"
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29
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30 /* This file (algo.c) organises the ciphers which can be used, and is used to
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31 * decide which ciphers/hashes/compression/signing to use during key exchange*/
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32
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33 static int void_cipher(const unsigned char* in, unsigned char* out,
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34 unsigned long len, void *cipher_state) {
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35 if (in != out) {
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36 memmove(out, in, len);
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37 }
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38 return CRYPT_OK;
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39 }
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40
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41 static int void_start(int cipher, const unsigned char *IV,
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42 const unsigned char *key,
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43 int keylen, int num_rounds, void *cipher_state) {
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44 return CRYPT_OK;
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45 }
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46
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47 /* Mappings for ciphers, parameters are
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48 {&cipher_desc, keysize, blocksize} */
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49
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50 /* Remember to add new ciphers/hashes to regciphers/reghashes too */
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51
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52 #ifdef DROPBEAR_AES256
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53 static const struct dropbear_cipher dropbear_aes256 =
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54 {&aes_desc, 32, 16};
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55 #endif
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56 #ifdef DROPBEAR_AES128
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57 static const struct dropbear_cipher dropbear_aes128 =
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58 {&aes_desc, 16, 16};
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59 #endif
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60 #ifdef DROPBEAR_BLOWFISH
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61 static const struct dropbear_cipher dropbear_blowfish =
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62 {&blowfish_desc, 16, 8};
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63 #endif
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64 #ifdef DROPBEAR_TWOFISH256
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65 static const struct dropbear_cipher dropbear_twofish256 =
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66 {&twofish_desc, 32, 16};
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67 #endif
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68 #ifdef DROPBEAR_TWOFISH128
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69 static const struct dropbear_cipher dropbear_twofish128 =
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70 {&twofish_desc, 16, 16};
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71 #endif
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72 #ifdef DROPBEAR_3DES
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73 static const struct dropbear_cipher dropbear_3des =
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74 {&des3_desc, 24, 8};
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75 #endif
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77 /* used to indicate no encryption, as defined in rfc2410 */
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78 const struct dropbear_cipher dropbear_nocipher =
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79 {NULL, 16, 8};
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81 /* A few void* s are required to silence warnings
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82 * about the symmetric_CBC vs symmetric_CTR cipher_state pointer */
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83 const struct dropbear_cipher_mode dropbear_mode_cbc =
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84 {(void*)cbc_start, (void*)cbc_encrypt, (void*)cbc_decrypt};
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85 const struct dropbear_cipher_mode dropbear_mode_none =
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86 {void_start, void_cipher, void_cipher};
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87 #ifdef DROPBEAR_ENABLE_CTR_MODE
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88 /* a wrapper to make ctr_start and cbc_start look the same */
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89 static int dropbear_big_endian_ctr_start(int cipher,
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90 const unsigned char *IV,
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91 const unsigned char *key, int keylen,
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92 int num_rounds, symmetric_CTR *ctr) {
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93 return ctr_start(cipher, IV, key, keylen, num_rounds, CTR_COUNTER_BIG_ENDIAN, ctr);
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94 }
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95 const struct dropbear_cipher_mode dropbear_mode_ctr =
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96 {(void*)dropbear_big_endian_ctr_start, (void*)ctr_encrypt, (void*)ctr_decrypt};
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97 #endif
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98
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99 /* Mapping of ssh hashes to libtomcrypt hashes, including keysize etc.
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100 {&hash_desc, keysize, hashsize} */
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101
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102 #ifdef DROPBEAR_SHA1_HMAC
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103 static const struct dropbear_hash dropbear_sha1 =
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104 {&sha1_desc, 20, 20};
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105 #endif
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106 #ifdef DROPBEAR_SHA1_96_HMAC
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107 static const struct dropbear_hash dropbear_sha1_96 =
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108 {&sha1_desc, 20, 12};
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109 #endif
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110 #ifdef DROPBEAR_SHA2_256_HMAC
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111 static const struct dropbear_hash dropbear_sha2_256 =
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112 {&sha256_desc, 32, 32};
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113 #endif
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114 #ifdef DROPBEAR_SHA2_512_HMAC
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115 static const struct dropbear_hash dropbear_sha2_512 =
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116 {&sha512_desc, 64, 64};
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117 #endif
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118 #ifdef DROPBEAR_MD5_HMAC
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119 static const struct dropbear_hash dropbear_md5 =
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120 {&md5_desc, 16, 16};
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121 #endif
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122
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123 const struct dropbear_hash dropbear_nohash =
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124 {NULL, 16, 0}; /* used initially */
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125
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126
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127 /* The following map ssh names to internal values.
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128 * The ordering here is important for the client - the first mode
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129 * that is also supported by the server will get used. */
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130
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131 algo_type sshciphers[] = {
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132 #ifdef DROPBEAR_ENABLE_CTR_MODE
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133 #ifdef DROPBEAR_AES128
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134 {"aes128-ctr", 0, &dropbear_aes128, 1, &dropbear_mode_ctr},
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135 #endif
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136 #ifdef DROPBEAR_3DES
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137 {"3des-ctr", 0, &dropbear_3des, 1, &dropbear_mode_ctr},
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138 #endif
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139 #ifdef DROPBEAR_AES256
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140 {"aes256-ctr", 0, &dropbear_aes256, 1, &dropbear_mode_ctr},
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141 #endif
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142 #endif /* DROPBEAR_ENABLE_CTR_MODE */
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143
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144 /* CBC modes are always enabled */
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145 #ifdef DROPBEAR_AES128
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146 {"aes128-cbc", 0, &dropbear_aes128, 1, &dropbear_mode_cbc},
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147 #endif
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148 #ifdef DROPBEAR_3DES
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149 {"3des-cbc", 0, &dropbear_3des, 1, &dropbear_mode_cbc},
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150 #endif
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151 #ifdef DROPBEAR_AES256
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152 {"aes256-cbc", 0, &dropbear_aes256, 1, &dropbear_mode_cbc},
235
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153 #endif
502
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154 #ifdef DROPBEAR_TWOFISH256
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155 {"twofish256-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc},
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156 {"twofish-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc},
235
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157 #endif
502
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158 #ifdef DROPBEAR_TWOFISH128
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159 {"twofish128-cbc", 0, &dropbear_twofish128, 1, &dropbear_mode_cbc},
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160 #endif
502
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161 #ifdef DROPBEAR_BLOWFISH
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162 {"blowfish-cbc", 0, &dropbear_blowfish, 1, &dropbear_mode_cbc},
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163 #endif
252
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164 #ifdef DROPBEAR_NONE_CIPHER
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165 {"none", 0, (void*)&dropbear_nocipher, 1, &dropbear_mode_none},
252
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166 #endif
502
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167 {NULL, 0, NULL, 0, NULL}
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168 };
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169
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170 algo_type sshhashes[] = {
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171 #ifdef DROPBEAR_SHA2_256_HMAC
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172 {"hmac-sha2-256", 0, &dropbear_sha2_256, 1, NULL},
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173 #endif
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174 #ifdef DROPBEAR_SHA2_512_HMAC
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175 {"hmac-sha2-512", 0, &dropbear_sha2_512, 1, NULL},
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176 #endif
228
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177 #ifdef DROPBEAR_SHA1_96_HMAC
502
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178 {"hmac-sha1-96", 0, &dropbear_sha1_96, 1, NULL},
228
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179 #endif
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180 #ifdef DROPBEAR_SHA1_HMAC
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181 {"hmac-sha1", 0, &dropbear_sha1, 1, NULL},
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182 #endif
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183 #ifdef DROPBEAR_MD5_HMAC
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184 {"hmac-md5", 0, (void*)&dropbear_md5, 1, NULL},
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185 #endif
252
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186 #ifdef DROPBEAR_NONE_INTEGRITY
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187 {"none", 0, (void*)&dropbear_nohash, 1, NULL},
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188 #endif
502
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189 {NULL, 0, NULL, 0, NULL}
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190 };
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191
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192 #ifndef DISABLE_ZLIB
575
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193 algo_type ssh_compress[] = {
502
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194 {"zlib", DROPBEAR_COMP_ZLIB, NULL, 1, NULL},
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195 {"[email protected]", DROPBEAR_COMP_ZLIB_DELAY, NULL, 1, NULL},
575
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196 {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL},
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197 {NULL, 0, NULL, 0, NULL}
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198 };
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199 #endif
575
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200
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201 algo_type ssh_nocompress[] = {
502
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202 {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL},
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203 {NULL, 0, NULL, 0, NULL}
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204 };
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205
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206 algo_type sshhostkey[] = {
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207 #ifdef DROPBEAR_RSA
502
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208 {"ssh-rsa", DROPBEAR_SIGNKEY_RSA, NULL, 1, NULL},
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209 #endif
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210 #ifdef DROPBEAR_DSS
502
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211 {"ssh-dss", DROPBEAR_SIGNKEY_DSS, NULL, 1, NULL},
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212 #endif
502
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213 {NULL, 0, NULL, 0, NULL}
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214 };
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215
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216 algo_type sshkex[] = {
747
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217 {"diffie-hellman-group1-sha1", DROPBEAR_KEX_DH_GROUP1, NULL, 1, NULL},
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15999b098cc9 Don't usually need to recalculate dh_e for the repeated kexdh_init packet
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218 {"diffie-hellman-group14-sha1", DROPBEAR_KEX_DH_GROUP14, NULL, 1, NULL},
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219 #ifdef USE_KEXGUESS2
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220 {KEXGUESS2_ALGO_NAME, KEXGUESS2_ALGO_ID, NULL, 1, NULL},
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221 #endif
502
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222 {NULL, 0, NULL, 0, NULL}
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223 };
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224
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225
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226 /* Register the compiled in ciphers.
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227 * This should be run before using any of the ciphers/hashes */
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228 void crypto_init() {
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229
194
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diff changeset
230 const struct ltc_cipher_descriptor *regciphers[] = {
502
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diff changeset
231 #ifdef DROPBEAR_AES
150
82fcf3185616 Cleaning out various dead wood found with -dead_strip
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232 &aes_desc,
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233 #endif
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234 #ifdef DROPBEAR_BLOWFISH
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235 &blowfish_desc,
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236 #endif
502
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237 #ifdef DROPBEAR_TWOFISH
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238 &twofish_desc,
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239 #endif
502
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diff changeset
240 #ifdef DROPBEAR_3DES
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241 &des3_desc,
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242 #endif
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243 NULL
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244 };
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245
194
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diff changeset
246 const struct ltc_hash_descriptor *reghashes[] = {
4
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247 /* we need sha1 for hostkey stuff regardless */
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248 &sha1_desc,
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249 #ifdef DROPBEAR_MD5_HMAC
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250 &md5_desc,
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251 #endif
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252 #ifdef DROPBEAR_SHA2_256_HMAC
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253 &sha256_desc,
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254 #endif
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255 #ifdef DROPBEAR_SHA2_512_HMAC
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256 &sha512_desc,
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257 #endif
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258 NULL
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259 };
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260 int i;
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261
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262 for (i = 0; regciphers[i] != NULL; i++) {
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263 if (register_cipher(regciphers[i]) == -1) {
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264 dropbear_exit("Error registering crypto");
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265 }
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266 }
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267
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268 for (i = 0; reghashes[i] != NULL; i++) {
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269 if (register_hash(reghashes[i]) == -1) {
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270 dropbear_exit("Error registering crypto");
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271 }
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272 }
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273 }
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274
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275 /* algolen specifies the length of algo, algos is our local list to match
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276 * against.
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277 * Returns DROPBEAR_SUCCESS if we have a match for algo, DROPBEAR_FAILURE
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278 * otherwise */
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279 int have_algo(char* algo, size_t algolen, algo_type algos[]) {
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280
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281 int i;
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282
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283 for (i = 0; algos[i].name != NULL; i++) {
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284 if (strlen(algos[i].name) == algolen
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285 && (strncmp(algos[i].name, algo, algolen) == 0)) {
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286 return DROPBEAR_SUCCESS;
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287 }
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288 }
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diff changeset
289
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
290 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
291 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
292
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
293 /* Output a comma separated list of algorithms to a buffer */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
294 void buf_put_algolist(buffer * buf, algo_type localalgos[]) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
295
238
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
296 unsigned int i, len;
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
297 unsigned int donefirst = 0;
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
298 buffer *algolist = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
299
502
43bbe17d6ba0 - Add Counter Mode support
Matt Johnston <matt@ucc.asn.au>
parents: 501
diff changeset
300 algolist = buf_new(160);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
301 for (i = 0; localalgos[i].name != NULL; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
302 if (localalgos[i].usable) {
238
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
303 if (donefirst)
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
304 buf_putbyte(algolist, ',');
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
305 donefirst = 1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
306 len = strlen(localalgos[i].name);
238
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
307 buf_putbytes(algolist, localalgos[i].name, len);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
308 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
309 }
238
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
310 buf_putstring(buf, algolist->data, algolist->len);
e923801a7678 use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
parents: 237
diff changeset
311 buf_free(algolist);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
312 }
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
313
741
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
314 /* match the first algorithm in the comma-separated list in buf which is
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
315 * also in localalgos[], or return NULL on failure.
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
316 * (*goodguess) is set to 1 if the preferred client/server algos match,
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
317 * 0 otherwise. This is used for checking if the kexalgo/hostkeyalgos are
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
318 * guessed correctly */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
319 algo_type * buf_match_algo(buffer* buf, algo_type localalgos[],
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
320 enum kexguess2_used *kexguess2, int *goodguess)
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
321 {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
322
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
323 unsigned char * algolist = NULL;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
324 const unsigned char *remotenames[MAX_PROPOSED_ALGO], *localnames[MAX_PROPOSED_ALGO];
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
325 unsigned int len;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
326 unsigned int remotecount, localcount, clicount, servcount, i, j;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
327 algo_type * ret = NULL;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
328 const unsigned char **clinames, **servnames;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
329
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
330 if (goodguess) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
331 *goodguess = 0;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
332 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
333
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
334 /* get the comma-separated list from the buffer ie "algo1,algo2,algo3" */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
335 algolist = buf_getstring(buf, &len);
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
336 TRACE(("buf_match_algo: %s", algolist))
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
337 if (len > MAX_PROPOSED_ALGO*(MAX_NAME_LEN+1)) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
338 goto out;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
339 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
340
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
341 /* remotenames will contain a list of the strings parsed out */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
342 /* We will have at least one string (even if it's just "") */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
343 remotenames[0] = algolist;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
344 remotecount = 1;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
345 for (i = 0; i < len; i++) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
346 if (algolist[i] == '\0') {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
347 /* someone is trying something strange */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
348 goto out;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
349 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
350 if (algolist[i] == ',') {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
351 algolist[i] = '\0';
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
352 remotenames[remotecount] = &algolist[i+1];
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
353 remotecount++;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
354 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
355 if (remotecount >= MAX_PROPOSED_ALGO) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
356 break;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
357 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
358 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
359 if (kexguess2 && *kexguess2 == KEXGUESS2_LOOK) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
360 for (i = 0; i < remotecount; i++)
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
361 {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
362 if (strcmp(remotenames[i], KEXGUESS2_ALGO_NAME) == 0) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
363 *kexguess2 = KEXGUESS2_YES;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
364 break;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
365 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
366 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
367 if (*kexguess2 == KEXGUESS2_LOOK) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
368 *kexguess2 = KEXGUESS2_NO;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
369 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
370 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
371
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
372 for (i = 0; localalgos[i].name != NULL; i++) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
373 if (localalgos[i].usable) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
374 localnames[i] = localalgos[i].name;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
375 } else {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
376 localnames[i] = NULL;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
377 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
378 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
379 localcount = i;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
380
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
381 if (IS_DROPBEAR_SERVER) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
382 clinames = remotenames;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
383 clicount = remotecount;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
384 servnames = localnames;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
385 servcount = localcount;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
386 } else {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
387 clinames = localnames;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
388 clicount = localcount;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
389 servnames = remotenames;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
390 servcount = remotecount;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
391 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
392
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
393 /* iterate and find the first match */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
394 for (i = 0; i < clicount; i++) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
395 for (j = 0; j < servcount; j++) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
396 if (!(servnames[j] && clinames[i])) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
397 // unusable algos are NULL
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
398 continue;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
399 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
400 if (strcmp(servnames[j], clinames[i]) == 0) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
401 /* set if it was a good guess */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
402 if (goodguess && kexguess2) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
403 if (*kexguess2 == KEXGUESS2_YES) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
404 if (i == 0) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
405 *goodguess = 1;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
406 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
407
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
408 } else {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
409 if (i == 0 && j == 0) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
410 *goodguess = 1;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
411 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
412 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
413 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
414 /* set the algo to return */
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
415 if (IS_DROPBEAR_SERVER) {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
416 ret = &localalgos[j];
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
417 } else {
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
418 ret = &localalgos[i];
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
419 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
420 goto out;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
421 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
422 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
423 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
424
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
425 out:
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
426 m_free(algolist);
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
427 return ret;
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
428 }
eafdf8b363f5 Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents: 740
diff changeset
429
686
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
430 #ifdef DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
431
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
432 void
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
433 set_algo_usable(algo_type algos[], const char * algo_name, int usable)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
434 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
435 algo_type *a;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
436 for (a = algos; a->name != NULL; a++)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
437 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
438 if (strcmp(a->name, algo_name) == 0)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
439 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
440 a->usable = usable;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
441 return;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
442 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
443 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
444 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
445
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
446 int
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
447 get_algo_usable(algo_type algos[], const char * algo_name)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
448 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
449 algo_type *a;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
450 for (a = algos; a->name != NULL; a++)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
451 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
452 if (strcmp(a->name, algo_name) == 0)
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
453 {
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
454 return a->usable;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
455 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
456 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
457 return 0;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
458 }
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
459
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
460 #endif // DROPBEAR_NONE_CIPHER
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
461
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
462 #ifdef ENABLE_USER_ALGO_LIST
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
463
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
464 char *
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
465 algolist_string(algo_type algos[])
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
466 {
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
467 char *ret_list;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
468 buffer *b = buf_new(200);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
469 buf_put_algolist(b, algos);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
470 buf_setpos(b, b->len);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
471 buf_putbyte(b, '\0');
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
472 buf_setpos(b, 4);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
473 ret_list = m_strdup(buf_getptr(b, b->len - b->pos));
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
474 buf_free(b);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
475 return ret_list;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
476 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
477
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
478 static algo_type*
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
479 check_algo(const char* algo_name, algo_type *algos)
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
480 {
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
481 algo_type *a;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
482 for (a = algos; a->name != NULL; a++)
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
483 {
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
484 if (strcmp(a->name, algo_name) == 0)
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
485 {
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
486 return a;
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
487 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
488 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
489
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
490 return NULL;
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
491 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
492
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
493 static void
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
494 try_add_algo(const char *algo_name, algo_type *algos,
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
495 const char *algo_desc, algo_type * new_algos, int *num_ret)
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
496 {
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
497 algo_type *match_algo = check_algo(algo_name, algos);
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
498 if (!match_algo)
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
499 {
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
500 dropbear_log(LOG_WARNING, "This Dropbear program does not support '%s' %s algorithm", algo_name, algo_desc);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
501 return;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
502 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
503
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
504 new_algos[*num_ret] = *match_algo;
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
505 (*num_ret)++;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
506 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
507
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
508 /* Checks a user provided comma-separated algorithm list for available
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
509 * options. Any that are not acceptable are removed in-place. Returns the
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
510 * number of valid algorithms. */
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
511 int
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
512 check_user_algos(const char* user_algo_list, algo_type * algos,
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
513 const char *algo_desc)
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
514 {
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
515 algo_type new_algos[MAX_PROPOSED_ALGO];
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
516 /* this has two passes. first we sweep through the given list of
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
517 * algorithms and mark them as usable=2 in the algo_type[] array... */
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
518 int num_ret = 0;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
519 char *work_list = m_strdup(user_algo_list);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
520 char *last_name = work_list;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
521 char *c;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
522 for (c = work_list; *c; c++)
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
523 {
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
524 if (*c == ',')
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
525 {
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
526 *c = '\0';
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
527 try_add_algo(last_name, algos, algo_desc, new_algos, &num_ret);
686
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
528 c++;
983a817f8e41 - Only request "none" cipher after auth has succeeded
Matt Johnston <matt@ucc.asn.au>
parents: 684
diff changeset
529 last_name = c;
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
530 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
531 }
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
532 try_add_algo(last_name, algos, algo_desc, new_algos, &num_ret);
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
533 m_free(work_list);
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
534
683
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
535 new_algos[num_ret].name = NULL;
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
536
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
537 /* Copy one more as a blank delimiter */
63f8d6c469cf ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents: 682
diff changeset
538 memcpy(algos, new_algos, sizeof(*new_algos) * (num_ret+1));
682
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
539 return num_ret;
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
540 }
4edea9f363d0 Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents: 595
diff changeset
541 #endif // ENABLE_USER_ALGO_LIST