Mercurial > dropbear
annotate algo.h @ 1524:d35cf9a5e0b5
rename default_options.h.in in docs too
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 20 Feb 2018 19:29:55 +0800 |
parents | 06d52bcb8094 |
children | 3a97f14c0235 ba6fc7afe1c5 |
rev | line source |
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1 /* |
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2 * Dropbear - a SSH2 server |
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3 * |
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4 * Copyright (c) 2002,2003 Matt Johnston |
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5 * All rights reserved. |
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6 * |
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
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8 * of this software and associated documentation files (the "Software"), to deal |
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9 * in the Software without restriction, including without limitation the rights |
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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11 * copies of the Software, and to permit persons to whom the Software is |
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12 * furnished to do so, subject to the following conditions: |
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13 * |
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14 * The above copyright notice and this permission notice shall be included in |
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15 * all copies or substantial portions of the Software. |
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16 * |
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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23 * SOFTWARE. */ |
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24 |
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25 #ifndef DROPBEAR_ALGO_H_ |
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26 |
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27 #define DROPBEAR_ALGO_H_ |
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28 |
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29 #include "includes.h" |
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30 #include "buffer.h" |
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31 |
502 | 32 #define DROPBEAR_MODE_UNUSED 0 |
33 #define DROPBEAR_MODE_CBC 1 | |
34 #define DROPBEAR_MODE_CTR 2 | |
35 | |
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36 struct Algo_Type { |
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37 |
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38 const char *name; /* identifying name */ |
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39 char val; /* a value for this cipher, or -1 for invalid */ |
502 | 40 const void *data; /* algorithm specific data */ |
41 char usable; /* whether we can use this algorithm */ | |
42 const void *mode; /* the mode, currently only used for ciphers, | |
43 points to a 'struct dropbear_cipher_mode' */ | |
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44 }; |
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45 |
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46 typedef struct Algo_Type algo_type; |
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47 |
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48 /* lists mapping ssh types of algorithms to internal values */ |
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49 extern algo_type sshkex[]; |
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50 extern algo_type sshhostkey[]; |
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51 extern algo_type sshciphers[]; |
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52 extern algo_type sshhashes[]; |
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53 extern algo_type ssh_compress[]; |
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54 extern algo_type ssh_delaycompress[]; |
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55 extern algo_type ssh_nocompress[]; |
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56 |
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57 extern const struct dropbear_cipher dropbear_nocipher; |
502 | 58 extern const struct dropbear_cipher_mode dropbear_mode_none; |
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59 extern const struct dropbear_hash dropbear_nohash; |
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60 |
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61 struct dropbear_cipher { |
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62 const struct ltc_cipher_descriptor *cipherdesc; |
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63 const unsigned long keysize; |
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64 const unsigned char blocksize; |
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65 }; |
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66 |
502 | 67 struct dropbear_cipher_mode { |
68 int (*start)(int cipher, const unsigned char *IV, | |
69 const unsigned char *key, | |
70 int keylen, int num_rounds, void *cipher_state); | |
71 int (*encrypt)(const unsigned char *pt, unsigned char *ct, | |
72 unsigned long len, void *cipher_state); | |
73 int (*decrypt)(const unsigned char *ct, unsigned char *pt, | |
74 unsigned long len, void *cipher_state); | |
75 }; | |
76 | |
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77 struct dropbear_hash { |
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78 const struct ltc_hash_descriptor *hash_desc; |
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79 const unsigned long keysize; |
857 | 80 /* hashsize may be truncated from the size returned by hash_desc, |
81 eg sha1-96 */ | |
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82 const unsigned char hashsize; |
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83 }; |
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84 |
848 | 85 enum dropbear_kex_mode { |
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86 #if DROPBEAR_NORMAL_DH |
848 | 87 DROPBEAR_KEX_NORMAL_DH, |
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88 #endif |
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89 #if DROPBEAR_ECDH |
848 | 90 DROPBEAR_KEX_ECDH, |
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91 #endif |
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92 #if DROPBEAR_CURVE25519 |
848 | 93 DROPBEAR_KEX_CURVE25519, |
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94 #endif |
848 | 95 }; |
96 | |
756 | 97 struct dropbear_kex { |
848 | 98 enum dropbear_kex_mode mode; |
99 | |
100 /* "normal" DH KEX */ | |
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101 const unsigned char *dh_p_bytes; |
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102 const int dh_p_len; |
756 | 103 |
848 | 104 /* elliptic curve DH KEX */ |
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105 #if DROPBEAR_ECDH |
756 | 106 const struct dropbear_ecc_curve *ecc_curve; |
848 | 107 #else |
108 const void* dummy; | |
756 | 109 #endif |
110 | |
848 | 111 /* both */ |
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112 const struct ltc_hash_descriptor *hash_desc; |
756 | 113 }; |
114 | |
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115 int have_algo(const char* algo, size_t algolen, const algo_type algos[]); |
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116 void buf_put_algolist(buffer * buf, const algo_type localalgos[]); |
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117 |
740 | 118 enum kexguess2_used { |
119 KEXGUESS2_LOOK, | |
120 KEXGUESS2_NO, | |
121 KEXGUESS2_YES, | |
122 }; | |
123 | |
124 #define KEXGUESS2_ALGO_NAME "[email protected]" | |
125 #define KEXGUESS2_ALGO_ID 99 | |
126 | |
127 | |
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128 algo_type * buf_match_algo(buffer* buf, algo_type localalgos[], |
740 | 129 enum kexguess2_used *kexguess2, int *goodguess); |
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130 |
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131 #if DROPBEAR_USER_ALGO_LIST |
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132 int check_user_algos(const char* user_algo_list, algo_type * algos, |
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133 const char *algo_desc); |
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134 char * algolist_string(const algo_type algos[]); |
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135 #endif |
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136 |
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137 enum { |
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138 DROPBEAR_COMP_NONE, |
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139 DROPBEAR_COMP_ZLIB, |
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140 DROPBEAR_COMP_ZLIB_DELAY, |
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141 }; |
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142 |
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143 #endif /* DROPBEAR_ALGO_H_ */ |