Mercurial > dropbear
annotate dropbearkey.c @ 1191:b370b4b172d0
Fix ses.channel_signal_pending race
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 27 Nov 2015 21:26:43 +0800 |
parents | 6fb4c010c448 |
children | c6346c63281b |
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 /* The format of the keyfiles is basically a raw dump of the buffer. Data types |
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26 * are specified in the transport rfc 4253 - string is a 32-bit len then the |
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27 * non-null-terminated string, mp_int is a 32-bit len then the bignum data. |
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28 * The actual functions are buf_put_rsa_priv_key() and buf_put_dss_priv_key() |
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29 |
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30 * RSA: |
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31 * string "ssh-rsa" |
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32 * mp_int e |
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33 * mp_int n |
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34 * mp_int d |
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35 * mp_int p (newer versions only) |
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36 * mp_int q (newer versions only) |
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37 * |
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38 * DSS: |
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39 * string "ssh-dss" |
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40 * mp_int p |
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41 * mp_int q |
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42 * mp_int g |
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43 * mp_int y |
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44 * mp_int x |
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45 * |
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46 */ |
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47 #include "includes.h" |
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48 #include "signkey.h" |
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49 #include "buffer.h" |
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50 #include "dbutil.h" |
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51 |
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52 #include "genrsa.h" |
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53 #include "gendss.h" |
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54 #include "ecdsa.h" |
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55 #include "crypto_desc.h" |
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56 #include "dbrandom.h" |
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57 #include "gensignkey.h" |
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58 |
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59 static void printhelp(char * progname); |
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60 |
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61 |
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62 static void printpubkey(sign_key * key, int keytype); |
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63 static int printpubfile(const char* filename); |
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64 |
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65 /* Print a help message */ |
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66 static void printhelp(char * progname) { |
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67 |
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68 fprintf(stderr, "Usage: %s -t <type> -f <filename> [-s bits]\n" |
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69 "-t type Type of key to generate. One of:\n" |
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70 #ifdef DROPBEAR_RSA |
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71 " rsa\n" |
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72 #endif |
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73 #ifdef DROPBEAR_DSS |
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74 " dss\n" |
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75 #endif |
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76 #ifdef DROPBEAR_ECDSA |
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77 " ecdsa\n" |
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78 #endif |
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79 "-f filename Use filename for the secret key.\n" |
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80 " ~/.ssh/id_dropbear is recommended for client keys.\n" |
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81 "-s bits Key size in bits, should be a multiple of 8 (optional)\n" |
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82 #ifdef DROPBEAR_DSS |
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83 " DSS has a fixed size of 1024 bits\n" |
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84 #endif |
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85 #ifdef DROPBEAR_ECDSA |
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86 " ECDSA has sizes " |
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87 #ifdef DROPBEAR_ECC_256 |
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88 "256 " |
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89 #endif |
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90 #ifdef DROPBEAR_ECC_384 |
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91 "384 " |
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92 #endif |
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93 #ifdef DROPBEAR_ECC_521 |
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94 "521 " |
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95 #endif |
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96 "\n" |
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97 #endif |
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98 "-y Just print the publickey and fingerprint for the\n private key in <filename>.\n" |
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99 #ifdef DEBUG_TRACE |
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100 "-v verbose\n" |
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101 #endif |
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102 ,progname); |
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103 } |
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104 |
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105 /* fails fatally */ |
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106 static void check_signkey_bits(enum signkey_type type, int bits) |
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107 { |
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108 switch (type) { |
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109 #ifdef DROPBEAR_RSA |
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110 case DROPBEAR_SIGNKEY_RSA: |
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111 if (bits < 512 || bits > 4096 || (bits % 8 != 0)) { |
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112 dropbear_exit("Bits must satisfy 512 <= bits <= 4096, and be a" |
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113 " multiple of 8\n"); |
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114 } |
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115 break; |
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116 #endif |
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117 #ifdef DROPEAR_DSS |
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118 case DROPBEAR_SIGNKEY_DSS: |
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119 if (bits != 1024) { |
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120 dropbear_exit("DSS keys have a fixed size of 1024 bits\n"); |
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121 exit(EXIT_FAILURE); |
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122 } |
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123 #endif |
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124 default: |
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125 (void)0; /* quiet, compiler. ecdsa handles checks itself */ |
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126 } |
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127 } |
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128 |
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129 #if defined(DBMULTI_dropbearkey) || !defined(DROPBEAR_MULTI) |
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130 #if defined(DBMULTI_dropbearkey) && defined(DROPBEAR_MULTI) |
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131 int dropbearkey_main(int argc, char ** argv) { |
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132 #else |
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133 int main(int argc, char ** argv) { |
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134 #endif |
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135 |
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136 int i; |
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137 char ** next = 0; |
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138 char * filename = NULL; |
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139 enum signkey_type keytype = DROPBEAR_SIGNKEY_NONE; |
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140 char * typetext = NULL; |
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141 char * sizetext = NULL; |
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142 unsigned int bits = 0; |
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143 int printpub = 0; |
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144 |
795 | 145 crypto_init(); |
146 seedrandom(); | |
147 | |
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148 /* get the commandline options */ |
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149 for (i = 1; i < argc; i++) { |
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150 if (argv[i] == NULL) { |
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151 continue; /* Whack */ |
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152 } |
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153 if (next) { |
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154 *next = argv[i]; |
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155 next = NULL; |
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156 continue; |
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157 } |
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158 |
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159 if (argv[i][0] == '-') { |
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160 switch (argv[i][1]) { |
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161 case 'f': |
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162 next = &filename; |
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163 break; |
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164 case 't': |
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165 next = &typetext; |
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166 break; |
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167 case 's': |
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168 next = &sizetext; |
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169 break; |
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170 case 'y': |
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171 printpub = 1; |
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172 break; |
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173 case 'h': |
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174 printhelp(argv[0]); |
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175 exit(EXIT_SUCCESS); |
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176 break; |
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177 #ifdef DEBUG_TRACE |
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178 case 'v': |
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179 debug_trace = 1; |
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180 break; |
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181 #endif |
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182 default: |
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183 fprintf(stderr, "Unknown argument %s\n", argv[i]); |
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184 printhelp(argv[0]); |
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185 exit(EXIT_FAILURE); |
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186 break; |
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187 } |
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188 } |
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189 } |
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190 |
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191 if (!filename) { |
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192 fprintf(stderr, "Must specify a key filename\n"); |
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193 printhelp(argv[0]); |
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194 exit(EXIT_FAILURE); |
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195 } |
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196 |
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197 if (printpub) { |
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198 int ret = printpubfile(filename); |
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199 exit(ret); |
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200 } |
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201 |
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202 /* check/parse args */ |
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203 if (!typetext) { |
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204 fprintf(stderr, "Must specify key type\n"); |
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205 printhelp(argv[0]); |
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206 exit(EXIT_FAILURE); |
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207 } |
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208 |
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209 #ifdef DROPBEAR_RSA |
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210 if (strcmp(typetext, "rsa") == 0) |
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211 { |
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212 keytype = DROPBEAR_SIGNKEY_RSA; |
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213 } |
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214 #endif |
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215 #ifdef DROPBEAR_DSS |
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216 if (strcmp(typetext, "dss") == 0) |
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217 { |
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218 keytype = DROPBEAR_SIGNKEY_DSS; |
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219 } |
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220 #endif |
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221 #ifdef DROPBEAR_ECDSA |
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222 if (strcmp(typetext, "ecdsa") == 0) |
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223 { |
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224 keytype = DROPBEAR_SIGNKEY_ECDSA_KEYGEN; |
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225 } |
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226 #endif |
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227 |
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228 if (keytype == DROPBEAR_SIGNKEY_NONE) { |
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229 fprintf(stderr, "Unknown key type '%s'\n", typetext); |
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230 printhelp(argv[0]); |
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231 exit(EXIT_FAILURE); |
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232 } |
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233 |
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234 if (sizetext) { |
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235 if (sscanf(sizetext, "%u", &bits) != 1) { |
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236 fprintf(stderr, "Bits must be an integer\n"); |
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237 exit(EXIT_FAILURE); |
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238 } |
457
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239 |
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240 check_signkey_bits(keytype, bits);; |
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241 } |
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242 |
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243 fprintf(stderr, "Generating key, this may take a while...\n"); |
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244 if (signkey_generate(keytype, bits, filename) == DROPBEAR_FAILURE) |
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245 { |
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246 dropbear_exit("Failed to generate key.\n"); |
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247 } |
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248 |
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249 printpubfile(filename); |
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250 |
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251 return EXIT_SUCCESS; |
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252 } |
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253 #endif |
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254 |
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255 static int printpubfile(const char* filename) { |
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256 |
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257 buffer *buf = NULL; |
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258 sign_key *key = NULL; |
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259 enum signkey_type keytype; |
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260 int ret; |
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261 int err = DROPBEAR_FAILURE; |
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262 |
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Dropbearkey can now print out pubkey portions
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263 buf = buf_new(MAX_PRIVKEY_SIZE); |
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264 ret = buf_readfile(buf, filename); |
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265 |
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266 if (ret != DROPBEAR_SUCCESS) { |
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267 fprintf(stderr, "Failed reading '%s'\n", filename); |
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268 goto out; |
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269 } |
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270 |
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271 key = new_sign_key(); |
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272 keytype = DROPBEAR_SIGNKEY_ANY; |
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273 |
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274 buf_setpos(buf, 0); |
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275 ret = buf_get_priv_key(buf, key, &keytype); |
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276 if (ret == DROPBEAR_FAILURE) { |
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277 fprintf(stderr, "Bad key in '%s'\n", filename); |
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278 goto out; |
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279 } |
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280 |
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281 printpubkey(key, keytype); |
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282 |
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283 err = DROPBEAR_SUCCESS; |
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284 |
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285 out: |
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286 buf_burn(buf); |
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287 buf_free(buf); |
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288 buf = NULL; |
340 | 289 if (key) { |
290 sign_key_free(key); | |
291 key = NULL; | |
292 } | |
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293 return err; |
73
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294 } |
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295 |
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296 static void printpubkey(sign_key * key, int keytype) { |
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297 |
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298 buffer * buf = NULL; |
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299 unsigned char base64key[MAX_PUBKEY_SIZE*2]; |
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300 unsigned long base64len; |
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301 int err; |
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302 const char * typestring = NULL; |
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303 char *fp = NULL; |
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304 int len; |
324
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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diff
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305 struct passwd * pw = NULL; |
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Include user@host in the pubkey line, since it's sometimes very useful
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306 char * username = NULL; |
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Include user@host in the pubkey line, since it's sometimes very useful
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307 char hostname[100]; |
73
0bf5cebe622c
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diff
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308 |
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309 buf = buf_new(MAX_PUBKEY_SIZE); |
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310 buf_put_pub_key(buf, key, keytype); |
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diff
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|
311 buf_setpos(buf, 4); |
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312 |
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313 len = buf->len - buf->pos; |
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314 |
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315 base64len = sizeof(base64key); |
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316 err = base64_encode(buf_getptr(buf, len), len, base64key, &base64len); |
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317 |
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318 if (err != CRYPT_OK) { |
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319 fprintf(stderr, "base64 failed"); |
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Dropbearkey can now print out pubkey portions
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|
320 } |
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321 |
794
d386defb5376
more ecdsa signkey work, not correct
Matt Johnston <matt@ucc.asn.au>
parents:
766
diff
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|
322 typestring = signkey_name_from_type(keytype, NULL); |
73
0bf5cebe622c
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diff
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323 |
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324 fp = sign_key_fingerprint(buf_getptr(buf, len), len); |
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325 |
324
bc7c134982df
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326 /* a user@host comment is informative */ |
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327 username = ""; |
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|
328 pw = getpwuid(getuid()); |
325
0e4f225b7e07
Add -N "no remote command" dbclient option.
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parents:
324
diff
changeset
|
329 if (pw) { |
324
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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330 username = pw->pw_name; |
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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331 } |
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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|
332 |
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Include user@host in the pubkey line, since it's sometimes very useful
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|
333 gethostname(hostname, sizeof(hostname)); |
bc7c134982df
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diff
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|
334 hostname[sizeof(hostname)-1] = '\0'; |
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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diff
changeset
|
335 |
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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|
336 printf("Public key portion is:\n%s %s %s@%s\nFingerprint: %s\n", |
bc7c134982df
Include user@host in the pubkey line, since it's sometimes very useful
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diff
changeset
|
337 typestring, base64key, username, hostname, fp); |
73
0bf5cebe622c
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diff
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|
338 |
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|
339 m_free(fp); |
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|
340 buf_free(buf); |
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|
341 } |