Mercurial > dropbear
annotate common-algo.c @ 1647:07b0d56d186d
Added tag DROPBEAR_2019.77 for changeset 6d1bbe7d5fa5
| author | Matt Johnston <matt@ucc.asn.au> |
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| date | Sat, 23 Mar 2019 21:54:21 +0800 |
| parents | 049b28f4be4a |
| children | d32bcb5c557d |
| rev | line source |
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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 "includes.h" |
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27 #include "algo.h" |
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28 #include "session.h" |
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29 #include "dbutil.h" |
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30 #include "dh_groups.h" |
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31 #include "ltc_prng.h" |
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32 #include "ecc.h" |
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33 |
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34 /* This file (algo.c) organises the ciphers which can be used, and is used to |
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35 * decide which ciphers/hashes/compression/signing to use during key exchange*/ |
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36 |
| 502 | 37 static int void_cipher(const unsigned char* in, unsigned char* out, |
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38 unsigned long len, void* UNUSED(cipher_state)) { |
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39 if (in != out) { |
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40 memmove(out, in, len); |
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41 } |
| 502 | 42 return CRYPT_OK; |
| 43 } | |
| 44 | |
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45 static int void_start(int UNUSED(cipher), const unsigned char* UNUSED(IV), |
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46 const unsigned char* UNUSED(key), |
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47 int UNUSED(keylen), int UNUSED(num_rounds), void* UNUSED(cipher_state)) { |
| 502 | 48 return CRYPT_OK; |
| 49 } | |
| 50 | |
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51 /* Mappings for ciphers, parameters are |
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52 {&cipher_desc, keysize, blocksize} */ |
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53 |
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54 /* Remember to add new ciphers/hashes to regciphers/reghashes too */ |
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55 |
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56 #if DROPBEAR_AES256 |
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57 static const struct dropbear_cipher dropbear_aes256 = |
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58 {&aes_desc, 32, 16}; |
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59 #endif |
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60 #if DROPBEAR_AES128 |
| 227 | 61 static const struct dropbear_cipher dropbear_aes128 = |
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62 {&aes_desc, 16, 16}; |
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63 #endif |
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64 #if DROPBEAR_BLOWFISH |
| 227 | 65 static const struct dropbear_cipher dropbear_blowfish = |
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66 {&blowfish_desc, 16, 8}; |
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67 #endif |
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68 #if DROPBEAR_TWOFISH256 |
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69 static const struct dropbear_cipher dropbear_twofish256 = |
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70 {&twofish_desc, 32, 16}; |
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71 #endif |
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72 #if DROPBEAR_TWOFISH128 |
| 227 | 73 static const struct dropbear_cipher dropbear_twofish128 = |
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74 {&twofish_desc, 16, 16}; |
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75 #endif |
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76 #if DROPBEAR_3DES |
| 227 | 77 static const struct dropbear_cipher dropbear_3des = |
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78 {&des3_desc, 24, 8}; |
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79 #endif |
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80 |
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81 /* used to indicate no encryption, as defined in rfc2410 */ |
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82 const struct dropbear_cipher dropbear_nocipher = |
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83 {NULL, 16, 8}; |
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84 |
| 502 | 85 /* A few void* s are required to silence warnings |
| 86 * about the symmetric_CBC vs symmetric_CTR cipher_state pointer */ | |
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87 #if DROPBEAR_ENABLE_CBC_MODE |
| 502 | 88 const struct dropbear_cipher_mode dropbear_mode_cbc = |
| 89 {(void*)cbc_start, (void*)cbc_encrypt, (void*)cbc_decrypt}; | |
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90 #endif /* DROPBEAR_ENABLE_CBC_MODE */ |
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91 |
| 502 | 92 const struct dropbear_cipher_mode dropbear_mode_none = |
| 93 {void_start, void_cipher, void_cipher}; | |
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94 |
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95 #if DROPBEAR_ENABLE_CTR_MODE |
| 502 | 96 /* a wrapper to make ctr_start and cbc_start look the same */ |
| 97 static int dropbear_big_endian_ctr_start(int cipher, | |
| 98 const unsigned char *IV, | |
| 99 const unsigned char *key, int keylen, | |
| 100 int num_rounds, symmetric_CTR *ctr) { | |
| 101 return ctr_start(cipher, IV, key, keylen, num_rounds, CTR_COUNTER_BIG_ENDIAN, ctr); | |
| 102 } | |
| 103 const struct dropbear_cipher_mode dropbear_mode_ctr = | |
| 104 {(void*)dropbear_big_endian_ctr_start, (void*)ctr_encrypt, (void*)ctr_decrypt}; | |
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105 #endif /* DROPBEAR_ENABLE_CTR_MODE */ |
| 502 | 106 |
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107 /* Mapping of ssh hashes to libtomcrypt hashes, including keysize etc. |
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108 {&hash_desc, keysize, hashsize} */ |
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109 |
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110 #if DROPBEAR_SHA1_HMAC |
| 227 | 111 static const struct dropbear_hash dropbear_sha1 = |
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112 {&sha1_desc, 20, 20}; |
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113 #endif |
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114 #if DROPBEAR_SHA1_96_HMAC |
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115 static const struct dropbear_hash dropbear_sha1_96 = |
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116 {&sha1_desc, 20, 12}; |
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117 #endif |
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118 #if DROPBEAR_SHA2_256_HMAC |
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119 static const struct dropbear_hash dropbear_sha2_256 = |
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120 {&sha256_desc, 32, 32}; |
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121 #endif |
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122 #if DROPBEAR_SHA2_512_HMAC |
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123 static const struct dropbear_hash dropbear_sha2_512 = |
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124 {&sha512_desc, 64, 64}; |
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125 #endif |
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126 #if DROPBEAR_MD5_HMAC |
| 227 | 127 static const struct dropbear_hash dropbear_md5 = |
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128 {&md5_desc, 16, 16}; |
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129 #endif |
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130 |
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131 const struct dropbear_hash dropbear_nohash = |
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132 {NULL, 16, 0}; /* used initially */ |
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133 |
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134 |
| 502 | 135 /* The following map ssh names to internal values. |
| 136 * The ordering here is important for the client - the first mode | |
| 137 * that is also supported by the server will get used. */ | |
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138 |
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139 algo_type sshciphers[] = { |
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140 #if DROPBEAR_ENABLE_CTR_MODE |
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141 #if DROPBEAR_AES128 |
| 502 | 142 {"aes128-ctr", 0, &dropbear_aes128, 1, &dropbear_mode_ctr}, |
| 143 #endif | |
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144 #if DROPBEAR_AES256 |
| 502 | 145 {"aes256-ctr", 0, &dropbear_aes256, 1, &dropbear_mode_ctr}, |
| 146 #endif | |
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147 #if DROPBEAR_TWOFISH_CTR |
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148 /* twofish ctr is conditional as it hasn't been tested for interoperability, see options.h */ |
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149 #if DROPBEAR_TWOFISH256 |
| 1012 | 150 {"twofish256-ctr", 0, &dropbear_twofish256, 1, &dropbear_mode_ctr}, |
| 151 #endif | |
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152 #if DROPBEAR_TWOFISH128 |
| 1012 | 153 {"twofish128-ctr", 0, &dropbear_twofish128, 1, &dropbear_mode_ctr}, |
| 154 #endif | |
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155 #endif /* DROPBEAR_TWOFISH_CTR */ |
| 502 | 156 #endif /* DROPBEAR_ENABLE_CTR_MODE */ |
| 157 | |
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158 #if DROPBEAR_ENABLE_CBC_MODE |
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159 #if DROPBEAR_AES128 |
| 502 | 160 {"aes128-cbc", 0, &dropbear_aes128, 1, &dropbear_mode_cbc}, |
| 161 #endif | |
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162 #if DROPBEAR_AES256 |
| 502 | 163 {"aes256-cbc", 0, &dropbear_aes256, 1, &dropbear_mode_cbc}, |
|
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164 #endif |
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165 #if DROPBEAR_TWOFISH256 |
| 502 | 166 {"twofish256-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc}, |
| 167 {"twofish-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc}, | |
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168 #endif |
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169 #if DROPBEAR_TWOFISH128 |
| 502 | 170 {"twofish128-cbc", 0, &dropbear_twofish128, 1, &dropbear_mode_cbc}, |
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171 #endif |
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172 #if DROPBEAR_3DES |
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173 {"3des-ctr", 0, &dropbear_3des, 1, &dropbear_mode_ctr}, |
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174 #endif |
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175 #if DROPBEAR_3DES |
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176 {"3des-cbc", 0, &dropbear_3des, 1, &dropbear_mode_cbc}, |
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177 #endif |
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178 #if DROPBEAR_BLOWFISH |
| 502 | 179 {"blowfish-cbc", 0, &dropbear_blowfish, 1, &dropbear_mode_cbc}, |
| 180 #endif | |
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181 #endif /* DROPBEAR_ENABLE_CBC_MODE */ |
| 502 | 182 {NULL, 0, NULL, 0, NULL} |
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183 }; |
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184 |
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185 algo_type sshhashes[] = { |
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186 #if DROPBEAR_SHA1_96_HMAC |
| 1017 | 187 {"hmac-sha1-96", 0, &dropbear_sha1_96, 1, NULL}, |
| 188 #endif | |
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189 #if DROPBEAR_SHA1_HMAC |
| 1017 | 190 {"hmac-sha1", 0, &dropbear_sha1, 1, NULL}, |
| 191 #endif | |
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192 #if DROPBEAR_SHA2_256_HMAC |
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193 {"hmac-sha2-256", 0, &dropbear_sha2_256, 1, NULL}, |
|
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194 #endif |
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195 #if DROPBEAR_SHA2_512_HMAC |
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196 {"hmac-sha2-512", 0, &dropbear_sha2_512, 1, NULL}, |
|
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197 #endif |
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198 #if DROPBEAR_MD5_HMAC |
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199 {"hmac-md5", 0, (void*)&dropbear_md5, 1, NULL}, |
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200 #endif |
| 502 | 201 {NULL, 0, NULL, 0, NULL} |
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202 }; |
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203 |
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204 #ifndef DISABLE_ZLIB |
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205 algo_type ssh_compress[] = { |
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206 {"[email protected]", DROPBEAR_COMP_ZLIB_DELAY, NULL, 1, NULL}, |
| 502 | 207 {"zlib", DROPBEAR_COMP_ZLIB, NULL, 1, NULL}, |
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208 {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL}, |
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209 {NULL, 0, NULL, 0, NULL} |
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210 }; |
|
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211 |
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212 algo_type ssh_delaycompress[] = { |
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213 {"[email protected]", DROPBEAR_COMP_ZLIB_DELAY, NULL, 1, NULL}, |
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214 {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL}, |
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215 {NULL, 0, NULL, 0, NULL} |
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216 }; |
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217 #endif |
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218 |
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219 algo_type ssh_nocompress[] = { |
| 502 | 220 {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL}, |
| 221 {NULL, 0, NULL, 0, NULL} | |
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222 }; |
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223 |
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224 algo_type sshhostkey[] = { |
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225 #if DROPBEAR_ECDSA |
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226 #if DROPBEAR_ECC_256 |
| 795 | 227 {"ecdsa-sha2-nistp256", DROPBEAR_SIGNKEY_ECDSA_NISTP256, NULL, 1, NULL}, |
| 228 #endif | |
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229 #if DROPBEAR_ECC_384 |
| 795 | 230 {"ecdsa-sha2-nistp384", DROPBEAR_SIGNKEY_ECDSA_NISTP384, NULL, 1, NULL}, |
| 231 #endif | |
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232 #if DROPBEAR_ECC_521 |
| 795 | 233 {"ecdsa-sha2-nistp521", DROPBEAR_SIGNKEY_ECDSA_NISTP521, NULL, 1, NULL}, |
| 234 #endif | |
| 235 #endif | |
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236 #if DROPBEAR_RSA |
| 502 | 237 {"ssh-rsa", DROPBEAR_SIGNKEY_RSA, NULL, 1, NULL}, |
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238 #endif |
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239 #if DROPBEAR_DSS |
| 502 | 240 {"ssh-dss", DROPBEAR_SIGNKEY_DSS, NULL, 1, NULL}, |
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241 #endif |
| 502 | 242 {NULL, 0, NULL, 0, NULL} |
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243 }; |
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244 |
|
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245 #if DROPBEAR_DH_GROUP1 |
| 848 | 246 static const struct dropbear_kex kex_dh_group1 = {DROPBEAR_KEX_NORMAL_DH, dh_p_1, DH_P_1_LEN, NULL, &sha1_desc }; |
|
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247 #endif |
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248 #if DROPBEAR_DH_GROUP14_SHA1 |
|
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249 static const struct dropbear_kex kex_dh_group14_sha1 = {DROPBEAR_KEX_NORMAL_DH, dh_p_14, DH_P_14_LEN, NULL, &sha1_desc }; |
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250 #endif |
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251 #if DROPBEAR_DH_GROUP14_SHA256 |
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252 static const struct dropbear_kex kex_dh_group14_sha256 = {DROPBEAR_KEX_NORMAL_DH, dh_p_14, DH_P_14_LEN, NULL, &sha256_desc }; |
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253 #endif |
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254 #if DROPBEAR_DH_GROUP16 |
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255 static const struct dropbear_kex kex_dh_group16_sha512 = {DROPBEAR_KEX_NORMAL_DH, dh_p_16, DH_P_16_LEN, NULL, &sha512_desc }; |
|
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256 #endif |
| 756 | 257 |
|
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258 /* These can't be const since dropbear_ecc_fill_dp() fills out |
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259 ecc_curve at runtime */ |
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260 #if DROPBEAR_ECDH |
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261 #if DROPBEAR_ECC_256 |
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262 static const struct dropbear_kex kex_ecdh_nistp256 = {DROPBEAR_KEX_ECDH, NULL, 0, &ecc_curve_nistp256, &sha256_desc }; |
| 756 | 263 #endif |
|
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264 #if DROPBEAR_ECC_384 |
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265 static const struct dropbear_kex kex_ecdh_nistp384 = {DROPBEAR_KEX_ECDH, NULL, 0, &ecc_curve_nistp384, &sha384_desc }; |
| 756 | 266 #endif |
|
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267 #if DROPBEAR_ECC_521 |
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268 static const struct dropbear_kex kex_ecdh_nistp521 = {DROPBEAR_KEX_ECDH, NULL, 0, &ecc_curve_nistp521, &sha512_desc }; |
| 756 | 269 #endif |
| 848 | 270 #endif /* DROPBEAR_ECDH */ |
| 756 | 271 |
|
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272 #if DROPBEAR_CURVE25519 |
| 848 | 273 /* Referred to directly */ |
|
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274 static const struct dropbear_kex kex_curve25519 = {DROPBEAR_KEX_CURVE25519, NULL, 0, NULL, &sha256_desc }; |
| 848 | 275 #endif |
| 756 | 276 |
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277 algo_type sshkex[] = { |
|
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278 #if DROPBEAR_CURVE25519 |
|
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279 {"curve25519-sha256", 0, &kex_curve25519, 1, NULL}, |
| 848 | 280 {"[email protected]", 0, &kex_curve25519, 1, NULL}, |
| 281 #endif | |
|
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282 #if DROPBEAR_ECDH |
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283 #if DROPBEAR_ECC_521 |
|
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284 {"ecdh-sha2-nistp521", 0, &kex_ecdh_nistp521, 1, NULL}, |
| 756 | 285 #endif |
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286 #if DROPBEAR_ECC_384 |
|
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287 {"ecdh-sha2-nistp384", 0, &kex_ecdh_nistp384, 1, NULL}, |
| 756 | 288 #endif |
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289 #if DROPBEAR_ECC_256 |
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290 {"ecdh-sha2-nistp256", 0, &kex_ecdh_nistp256, 1, NULL}, |
| 756 | 291 #endif |
| 292 #endif | |
|
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293 #if DROPBEAR_DH_GROUP14_SHA256 |
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294 {"diffie-hellman-group14-sha256", 0, &kex_dh_group14_sha256, 1, NULL}, |
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295 #endif |
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296 #if DROPBEAR_DH_GROUP14_SHA1 |
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297 {"diffie-hellman-group14-sha1", 0, &kex_dh_group14_sha1, 1, NULL}, |
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298 #endif |
|
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299 #if DROPBEAR_DH_GROUP1 |
| 756 | 300 {"diffie-hellman-group1-sha1", 0, &kex_dh_group1, 1, NULL}, |
|
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301 #endif |
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302 #if DROPBEAR_DH_GROUP16 |
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303 {"diffie-hellman-group16-sha512", 0, &kex_dh_group16_sha512, 1, NULL}, |
|
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304 #endif |
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305 #if DROPBEAR_KEXGUESS2 |
| 740 | 306 {KEXGUESS2_ALGO_NAME, KEXGUESS2_ALGO_ID, NULL, 1, NULL}, |
|
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307 #endif |
| 502 | 308 {NULL, 0, NULL, 0, NULL} |
|
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309 }; |
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310 |
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311 /* algolen specifies the length of algo, algos is our local list to match |
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312 * against. |
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313 * Returns DROPBEAR_SUCCESS if we have a match for algo, DROPBEAR_FAILURE |
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314 * otherwise */ |
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315 int have_algo(const char* algo, size_t algolen, const algo_type algos[]) { |
|
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316 |
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317 int i; |
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318 |
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319 for (i = 0; algos[i].name != NULL; i++) { |
|
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320 if (strlen(algos[i].name) == algolen |
|
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321 && (strncmp(algos[i].name, algo, algolen) == 0)) { |
|
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322 return DROPBEAR_SUCCESS; |
|
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323 } |
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324 } |
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325 |
|
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326 return DROPBEAR_FAILURE; |
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|
327 } |
|
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328 |
|
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329 /* Output a comma separated list of algorithms to a buffer */ |
|
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330 void buf_put_algolist(buffer * buf, const algo_type localalgos[]) { |
|
4
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331 |
|
238
e923801a7678
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|
332 unsigned int i, len; |
|
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use a buffer rather than raw char array for creating
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333 unsigned int donefirst = 0; |
|
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use a buffer rather than raw char array for creating
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334 buffer *algolist = NULL; |
|
4
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335 |
|
1225
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add dh group15 and group16, disabled by default
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336 algolist = buf_new(300); |
|
4
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337 for (i = 0; localalgos[i].name != NULL; i++) { |
|
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338 if (localalgos[i].usable) { |
|
238
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use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
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diff
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339 if (donefirst) |
|
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diff
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|
340 buf_putbyte(algolist, ','); |
|
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diff
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|
341 donefirst = 1; |
|
4
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|
342 len = strlen(localalgos[i].name); |
|
1106
2052b53d3034
Turn Algo_Type's name attribute into const char *
Gaël PORTAY <gael.portay@gmail.com>
parents:
1094
diff
changeset
|
343 buf_putbytes(algolist, (const unsigned char *) localalgos[i].name, len); |
|
4
fe6bca95afa7
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|
344 } |
|
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|
345 } |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
diff
changeset
|
346 buf_putstring(buf, (const char*)algolist->data, algolist->len); |
|
1294
56aba7dedbea
options for disabling "normal" DH
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diff
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|
347 TRACE(("algolist add '%*s'", algolist->len, algolist->data)) |
|
238
e923801a7678
use a buffer rather than raw char array for creating
Matt Johnston <matt@ucc.asn.au>
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237
diff
changeset
|
348 buf_free(algolist); |
|
4
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Matt Johnston <matt@ucc.asn.au>
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changeset
|
349 } |
|
682
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
350 |
|
741
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
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740
diff
changeset
|
351 /* 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
|
352 * also in localalgos[], or return NULL on failure. |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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parents:
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diff
changeset
|
353 * (*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>
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740
diff
changeset
|
354 * 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
|
355 * guessed correctly */ |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
356 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
|
357 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
|
358 { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
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740
diff
changeset
|
359 |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1038
diff
changeset
|
360 char * algolist = NULL; |
|
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1038
diff
changeset
|
361 const char *remotenames[MAX_PROPOSED_ALGO], *localnames[MAX_PROPOSED_ALGO]; |
|
741
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
362 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
|
363 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
|
364 algo_type * ret = NULL; |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1038
diff
changeset
|
365 const char **clinames, **servnames; |
|
741
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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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 (goodguess) { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
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740
diff
changeset
|
368 *goodguess = 0; |
|
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
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parents:
740
diff
changeset
|
371 /* 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
|
372 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
|
373 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
|
374 if (len > MAX_PROPOSED_ALGO*(MAX_NAME_LEN+1)) { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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740
diff
changeset
|
375 goto out; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
376 } |
|
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
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740
diff
changeset
|
378 /* remotenames will contain a list of the strings parsed out */ |
|
eafdf8b363f5
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740
diff
changeset
|
379 /* We will have at least one string (even if it's just "") */ |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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parents:
740
diff
changeset
|
380 remotenames[0] = algolist; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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740
diff
changeset
|
381 remotecount = 1; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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parents:
740
diff
changeset
|
382 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
|
383 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
|
384 /* 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
|
385 goto out; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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parents:
740
diff
changeset
|
386 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
387 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
|
388 algolist[i] = '\0'; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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parents:
740
diff
changeset
|
389 remotenames[remotecount] = &algolist[i+1]; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
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parents:
740
diff
changeset
|
390 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 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
|
393 break; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
394 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
395 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
396 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
|
397 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
|
398 { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
399 if (strcmp(remotenames[i], KEXGUESS2_ALGO_NAME) == 0) { |
|
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Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
400 *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
|
401 break; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
402 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
403 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
404 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
|
405 *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
|
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 |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
409 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
|
410 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
|
411 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
|
412 } else { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
413 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
|
414 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
415 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
416 localcount = i; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
417 |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
418 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
|
419 clinames = remotenames; |
|
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Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
420 clicount = remotecount; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
421 servnames = localnames; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
422 servcount = localcount; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
423 } else { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
424 clinames = localnames; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
425 clicount = localcount; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
426 servnames = remotenames; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
427 servcount = remotecount; |
|
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 |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
430 /* 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
|
431 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
|
432 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
|
433 if (!(servnames[j] && clinames[i])) { |
| 857 | 434 /* unusable algos are NULL */ |
|
741
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
435 continue; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
436 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
437 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
|
438 /* 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
|
439 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
|
440 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
|
441 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
|
442 *goodguess = 1; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
443 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
444 |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
445 } else { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
446 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
|
447 *goodguess = 1; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
448 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
449 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
450 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
451 /* 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
|
452 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
|
453 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
|
454 } else { |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
455 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
|
456 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
457 goto out; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
458 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
459 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
460 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
461 |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
462 out: |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
463 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
|
464 return ret; |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
465 } |
|
eafdf8b363f5
Get rid of client/server specific buf_match_algo, use single
Matt Johnston <matt@ucc.asn.au>
parents:
740
diff
changeset
|
466 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
467 #if DROPBEAR_USER_ALGO_LIST |
|
682
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
468 |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
469 char * |
|
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1316
diff
changeset
|
470 algolist_string(const 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
|
471 { |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
472 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
|
473 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
|
474 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
|
475 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
|
476 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
|
477 buf_setpos(b, 4); |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1038
diff
changeset
|
478 ret_list = m_strdup((const char *) buf_getptr(b, b->len - b->pos)); |
|
682
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
479 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
|
480 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
|
481 } |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
482 |
|
683
63f8d6c469cf
ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents:
682
diff
changeset
|
483 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
|
484 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
|
485 { |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
486 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
|
487 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
|
488 { |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
489 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
|
490 { |
|
683
63f8d6c469cf
ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents:
682
diff
changeset
|
491 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
|
492 } |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
493 } |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
494 |
|
683
63f8d6c469cf
ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents:
682
diff
changeset
|
495 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
|
496 } |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
497 |
|
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
498 /* 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
|
499 * 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
|
500 * 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
|
501 int |
|
683
63f8d6c469cf
ENABLE_USER_ALGO_LIST should work for the client
Matt Johnston <matt@ucc.asn.au>
parents:
682
diff
changeset
|
502 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
|
503 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
|
504 { |
|
1303
eed9376a4ad6
improve algorithm list parsing
Matt Johnston <matt@ucc.asn.au>
parents:
1273
diff
changeset
|
505 algo_type new_algos[MAX_PROPOSED_ALGO+1]; |
|
682
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
506 char *work_list = m_strdup(user_algo_list); |
|
1303
eed9376a4ad6
improve algorithm list parsing
Matt Johnston <matt@ucc.asn.au>
parents:
1273
diff
changeset
|
507 char *start = work_list; |
|
682
4edea9f363d0
Add rough support for choosing ciphers/hashes with "-c" or "-m"
Matt Johnston <matt@ucc.asn.au>
parents:
595
diff
changeset
|
508 char *c; |
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509 int n; |
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510 /* So we can iterate and look for null terminator */ |
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511 memset(new_algos, 0x0, sizeof(new_algos)); |
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512 for (c = work_list, n = 0; ; c++) |
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513 { |
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514 char oc = *c; |
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515 if (n >= MAX_PROPOSED_ALGO) { |
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516 dropbear_exit("Too many algorithms '%s'", user_algo_list); |
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517 } |
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518 if (*c == ',' || *c == '\0') { |
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519 algo_type *match_algo = NULL; |
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520 *c = '\0'; |
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521 match_algo = check_algo(start, algos); |
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522 if (match_algo) { |
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523 if (check_algo(start, new_algos)) { |
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524 TRACE(("Skip repeated algorithm '%s'", start)) |
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525 } else { |
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526 new_algos[n] = *match_algo; |
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527 n++; |
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528 } |
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529 } else { |
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530 dropbear_log(LOG_WARNING, "This Dropbear program does not support '%s' %s algorithm", start, algo_desc); |
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531 } |
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532 c++; |
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533 start = c; |
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534 } |
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535 if (oc == '\0') { |
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536 break; |
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537 } |
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538 } |
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539 m_free(work_list); |
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540 /* n+1 to include a null terminator */ |
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541 memcpy(algos, new_algos, sizeof(*new_algos) * (n+1)); |
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542 return n; |
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543 } |
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544 #endif /* DROPBEAR_USER_ALGO_LIST */ |