1 | //authfile.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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5 | * |
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6 | * This file is part of libroar a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * libroar is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | struct roar_authfile { |
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39 | size_t refc; |
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40 | size_t lockc; |
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41 | int type; |
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42 | int rw; |
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43 | int version; |
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44 | size_t magiclen; |
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45 | struct roar_vio_calls vio; |
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46 | }; |
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47 | |
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48 | struct roar_authfile * roar_authfile_open(int type, const char * filename, int rw, int version) { |
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49 | struct roar_vio_defaults def; |
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50 | struct roar_authfile * ret; |
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51 | size_t magiclen = 0; |
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52 | #if defined(ROAR_HAVE_STAT) && defined(ROAR_HAVE_H_SYS_STAT) |
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53 | struct stat filestat; |
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54 | #endif |
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55 | |
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56 | if ( type == ROAR_AUTHFILE_TYPE_AUTO ) { |
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57 | #if defined(ROAR_HAVE_STAT) && defined(ROAR_HAVE_H_SYS_STAT) |
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58 | if ( stat(filename, &filestat) != 0 ) |
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59 | return NULL; |
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60 | |
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61 | if ( filestat.st_size == 16 ) { |
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62 | type = ROAR_AUTHFILE_TYPE_ESD; |
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63 | } else if ( filestat.st_size == 256 ) { |
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64 | type = ROAR_AUTHFILE_TYPE_PULSE; |
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65 | } else { |
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66 | return NULL; |
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67 | } |
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68 | #else |
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69 | return NULL; |
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70 | #endif |
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71 | } |
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72 | |
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73 | switch (type) { |
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74 | case ROAR_AUTHFILE_TYPE_ESD: |
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75 | case ROAR_AUTHFILE_TYPE_PULSE: |
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76 | break; |
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77 | default: |
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78 | return NULL; |
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79 | break; |
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80 | } |
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81 | |
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82 | if ( roar_vio_dstr_init_defaults(&def, ROAR_VIO_DEF_TYPE_NONE, rw ? O_RDWR|O_CREAT : O_RDONLY, 0600) == -1 ) |
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83 | return NULL; |
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84 | |
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85 | if ( (ret = roar_mm_malloc(sizeof(struct roar_authfile))) == NULL ) |
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86 | return NULL; |
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87 | |
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88 | memset(ret, 0, sizeof(struct roar_authfile)); |
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89 | |
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90 | ret->refc = 1; |
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91 | ret->lockc = 0; |
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92 | ret->type = type; |
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93 | ret->rw = rw; |
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94 | ret->version = version; |
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95 | ret->magiclen = magiclen; |
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96 | |
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97 | filename = roar_mm_strdup(filename); |
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98 | |
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99 | if ( roar_vio_open_dstr(&(ret->vio), filename, &def, 1) == -1 ) { |
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100 | roar_mm_free((void*)filename); |
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101 | roar_mm_free(ret); |
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102 | return NULL; |
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103 | } |
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104 | |
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105 | roar_mm_free((void*)filename); |
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106 | |
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107 | return ret; |
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108 | } |
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109 | |
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110 | int roar_authfile_close(struct roar_authfile * authfile) { |
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111 | if ( authfile == NULL ) |
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112 | return -1; |
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113 | |
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114 | roar_vio_close(&(authfile->vio)); |
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115 | |
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116 | roar_mm_free(authfile); |
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117 | |
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118 | return 0; |
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119 | } |
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120 | |
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121 | int roar_authfile_lock(struct roar_authfile * authfile) { |
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122 | if ( authfile == NULL ) |
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123 | return -1; |
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124 | |
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125 | // TODO: implement real locking here. |
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126 | return 0; |
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127 | } |
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128 | |
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129 | int roar_authfile_unlock(struct roar_authfile * authfile) { |
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130 | if ( authfile == NULL ) |
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131 | return -1; |
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132 | |
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133 | // TODO: implement real unlocking here. |
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134 | return 0; |
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135 | } |
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136 | |
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137 | int roar_authfile_sync(struct roar_authfile * authfile) { |
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138 | if ( authfile == NULL ) |
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139 | return -1; |
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140 | |
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141 | return roar_vio_sync(&(authfile->vio)); |
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142 | } |
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143 | |
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144 | |
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145 | struct roar_authfile_key * roar_authfile_key_new(int type, size_t len, const char * addr) { |
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146 | struct roar_authfile_key * ret; |
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147 | size_t addrlen; |
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148 | size_t retlen; |
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149 | |
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150 | if ( addr == NULL ) { |
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151 | addrlen = 0; |
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152 | } else { |
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153 | addrlen = strlen(addr) + 1; |
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154 | } |
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155 | |
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156 | retlen = sizeof(struct roar_authfile_key) + len + addrlen; |
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157 | |
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158 | if ( (ret = roar_mm_malloc(retlen)) == NULL ) |
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159 | return NULL; |
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160 | |
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161 | memset(ret, 0, retlen); |
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162 | |
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163 | ret->refc = 1; |
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164 | ret->type = type; |
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165 | ret->index = -1; |
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166 | |
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167 | if ( addrlen == 0 ) { |
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168 | ret->address = NULL; |
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169 | } else { |
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170 | ret->address = (const void *)ret+sizeof(struct roar_authfile_key); |
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171 | memcpy((void*)ret->address, addr, addrlen); |
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172 | } |
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173 | |
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174 | ret->data = (void*)ret + sizeof(struct roar_authfile_key) + addrlen; |
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175 | |
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176 | ret->len = len; |
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177 | |
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178 | return ret; |
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179 | } |
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180 | |
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181 | int roar_authfile_key_ref(struct roar_authfile_key * key) { |
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182 | if ( key == NULL ) |
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183 | return -1; |
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184 | |
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185 | key->refc++; |
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186 | |
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187 | return 0; |
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188 | } |
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189 | |
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190 | int roar_authfile_key_unref(struct roar_authfile_key * key) { |
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191 | if ( key == NULL ) |
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192 | return -1; |
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193 | |
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194 | if ( key->refc == 0 ) { |
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195 | ROAR_ERR("roar_authfile_key_unref(key=%p): Key has reference count of zero. This is bad. assuming refc=1", key); |
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196 | key->refc = 1; |
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197 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION, NULL); |
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198 | } |
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199 | |
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200 | key->refc--; |
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201 | |
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202 | if ( key->refc > 0 ) |
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203 | return 0; |
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204 | |
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205 | roar_mm_free(key); |
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206 | |
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207 | return 0; |
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208 | } |
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209 | |
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210 | int roar_authfile_add_key(struct roar_authfile * authfile, struct roar_authfile_key * key) { |
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211 | if ( authfile == NULL || key == NULL ) |
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212 | return -1; |
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213 | |
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214 | switch (authfile->type) { |
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215 | case ROAR_AUTHFILE_TYPE_ESD: |
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216 | case ROAR_AUTHFILE_TYPE_PULSE: |
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217 | if ( key->type != ROAR_AUTH_T_COOKIE || (key->index != 0 && key->index != -1) ) |
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218 | return -1; |
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219 | if ( roar_authfile_sync(authfile) == -1 ) |
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220 | return -1; |
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221 | if ( roar_authfile_lock(authfile) == -1 ) |
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222 | return -1; |
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223 | if ( roar_vio_lseek(&(authfile->vio), 0, SEEK_SET) != 0 ) |
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224 | return -1; |
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225 | if ( roar_vio_write(&(authfile->vio), key->data, key->len) != (ssize_t)key->len ) |
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226 | return -1; |
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227 | if ( roar_authfile_unlock(authfile) == -1 ) |
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228 | return -1; |
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229 | return 0; |
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230 | break; |
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231 | default: |
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232 | return -1; |
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233 | break; |
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234 | } |
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235 | } |
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236 | |
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237 | struct roar_authfile_key * roar_authfile_lookup_key(struct roar_authfile * authfile, |
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238 | int type, int minindex, const char * address) { |
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239 | struct roar_authfile_key * ret = NULL; |
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240 | ssize_t len; |
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241 | |
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242 | if ( authfile == NULL ) |
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243 | return NULL; |
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244 | |
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245 | switch (authfile->type) { |
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246 | case ROAR_AUTHFILE_TYPE_ESD: |
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247 | case ROAR_AUTHFILE_TYPE_PULSE: |
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248 | if ( (type != ROAR_AUTH_T_COOKIE && type != ROAR_AUTH_T_AUTO) || minindex > 0 ) |
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249 | return NULL; |
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250 | |
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251 | if ( (ret = roar_authfile_key_new(ROAR_AUTH_T_COOKIE, 256, NULL)) == NULL ) |
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252 | return NULL; |
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253 | |
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254 | len = roar_vio_read(&(authfile->vio), ret->data, ret->len); |
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255 | |
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256 | if ( len == -1 ) { |
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257 | roar_authfile_key_unref(ret); |
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258 | return NULL; |
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259 | } |
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260 | |
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261 | ret->len = len; |
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262 | ret->index = 0; |
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263 | break; |
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264 | default: |
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265 | return NULL; |
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266 | break; |
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267 | } |
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268 | |
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269 | return ret; |
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270 | } |
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271 | |
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272 | struct roar_authfile_key * roar_authfile_key_new_random(int type, size_t len, const char * addr) { |
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273 | struct roar_authfile_key * ret = roar_authfile_key_new(type, len, addr); |
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274 | |
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275 | if ( ret == NULL ) |
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276 | return NULL; |
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277 | |
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278 | roar_random_gen_nonce(ret->data, ret->len); |
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279 | |
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280 | return ret; |
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281 | } |
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282 | |
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283 | //ll |
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