Mercurial > trustbridge
annotate common/listutil.c @ 1286:4d2c4873334b
Removed old unused translation strings (vanished/obsolete)
author | Emanuel Schuetze <emanuel@intevation.de> |
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date | Mon, 29 Sep 2014 13:02:05 +0200 |
parents | 3cd8dd706aaa |
children | 8d27c6d226cd |
rev | line source |
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404 | 1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik |
2 * Software engineering by Intevation GmbH | |
3 * | |
4 * This file is Free Software under the GNU GPL (v>=2) | |
5 * and comes with ABSOLUTELY NO WARRANTY! | |
6 * See LICENSE.txt for details. | |
7 */ | |
4
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8 #include "listutil.h" |
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9 |
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10 #include <stdio.h> |
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11 #include <stdlib.h> |
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12 #include <errno.h> |
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13 #include <fcntl.h> |
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14 #include <unistd.h> |
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15 #include <sys/types.h> |
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16 #include <sys/stat.h> |
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17 #include <string.h> |
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18 |
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19 #ifdef WIN32 |
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20 #include <share.h> |
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21 #endif |
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22 |
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23 #include "strhelp.h" |
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24 #include "logging.h" |
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25 #include "portpath.h" |
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26 |
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27 #ifdef RELEASE_BUILD |
28
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28 #include "pubkey-release.h" |
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29 #else |
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30 #include "pubkey-test.h" |
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31 #endif |
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32 |
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33 #ifndef __clang__ |
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34 #pragma GCC diagnostic ignored "-Wconversion" |
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35 #endif |
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36 /* Polarssl mh.h contains a conversion which gcc warns about */ |
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37 #include <polarssl/pk.h> |
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38 #include <polarssl/base64.h> |
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39 #include <polarssl/sha256.h> |
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40 #ifndef __clang__ |
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41 #pragma GCC diagnostic pop |
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42 #endif |
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43 |
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44 #define MAX_FILESIZE (MAX_LINE_LENGTH * MAX_LINES) |
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45 |
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46 #define READ_FILE_UNREADABLE -1 |
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47 #define READ_FILE_TOO_LARGE -2 |
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48 #define READ_FILE_NO_MEMORY -3 |
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49 #define READ_FILE_READ_FAILED -4 |
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50 #define READ_FILE_INVALID_CALL -5 |
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51 int |
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52 read_file(const char *file_name, char **data, size_t *size, |
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53 const size_t max_size, FILE **fptr) |
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54 { |
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55 FILE *f; |
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56 long file_size; |
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57 |
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58 if (!file_name || !data || !size || !max_size) |
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59 { |
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60 return READ_FILE_INVALID_CALL; |
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61 } |
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62 |
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63 f = port_fopen_rb(file_name, true); |
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64 if (f == NULL) |
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65 return READ_FILE_UNREADABLE; |
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66 |
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67 fseek(f, 0, SEEK_END); |
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68 file_size = ftell(f); |
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69 if (file_size <= 0) |
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70 { |
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71 fclose(f); |
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72 return READ_FILE_UNREADABLE; |
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73 } |
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74 |
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75 fseek(f, 0, SEEK_SET); |
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76 |
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77 if (file_size + 1 == 0) |
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78 { |
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79 fclose(f); |
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80 return READ_FILE_TOO_LARGE; |
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81 } |
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82 *size = (size_t) file_size; |
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83 |
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84 if (*size > max_size) |
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85 { |
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86 fclose(f); |
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87 return READ_FILE_TOO_LARGE; |
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88 } |
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89 |
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90 *data = (char *) malloc( *size + 1 ); |
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91 if (*data == NULL) |
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92 { |
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93 fclose(f); |
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94 return READ_FILE_NO_MEMORY; |
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95 } |
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96 |
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97 if (fread(*data, 1, *size, f) != *size) |
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98 { |
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99 free(*data); |
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100 fclose(f); |
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101 return READ_FILE_READ_FAILED; |
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102 } |
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103 |
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104 if (fptr) |
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105 { |
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106 *fptr = f; |
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107 } |
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108 else |
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109 { |
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110 fclose(f); |
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111 } |
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112 |
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113 (*data)[*size] = '\0'; |
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114 |
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115 return 0; |
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116 } |
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117 |
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118 int verify_list(const char *data, const size_t size) |
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119 { |
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120 int ret = -1; |
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121 pk_context pub_key_ctx; |
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122 char *p; |
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123 |
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124 /* Modulus / 8 are the necessary bytes. */ |
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125 #ifndef TRUSTBRIDGE_RSA_KEY_SIZE |
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126 # error "Key size undefined" |
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127 #endif |
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128 const size_t sig_b64_size = TRUSTBRIDGE_RSA_KEY_SIZE / 8 * 4 / 3; |
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129 size_t sig_size = TRUSTBRIDGE_RSA_KEY_SIZE / 8; |
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130 |
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131 char signature_b64[sig_b64_size + 1]; |
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132 unsigned char signature[sig_size]; |
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133 /* Hash algroithm is sha256 */ |
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134 unsigned char hash[32]; |
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135 |
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136 if (!data || !size) |
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137 { |
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138 return -1; |
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139 } |
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140 |
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141 /* Fetch the signature from the first line od data */ |
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142 p = strchr(data, '\r'); |
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143 if (p == 0 || (unsigned int)(p - (data + 2)) != sig_b64_size) |
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144 { |
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145 /* printf("Invalid data. Signature might be too long.\n"); */ |
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146 return -1; |
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147 } |
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148 strncpy(signature_b64, data + 2, sig_b64_size); |
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149 signature_b64[sig_b64_size] = '\0'; |
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150 |
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151 ret = base64_decode(signature, &sig_size, |
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152 (unsigned char *)signature_b64, sig_b64_size); |
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153 |
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154 if (ret != 0 || sig_size != TRUSTBRIDGE_RSA_KEY_SIZE / 8) |
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155 { |
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156 /* printf("failed to decode signature\n"); */ |
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157 return -1; |
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158 } |
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159 |
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160 /* Hash is calculated over the data without the first line. |
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161 * linebreaks are \r\n so the first char of the new line is |
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162 * p+2 */ |
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163 p += 2; |
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164 /* Size of the data to hash is the size - signature line |
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165 * signature line is sig_b64_size - "S:" and - "\r\n" so -4*/ |
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166 sha256((unsigned char *)p, size - sig_b64_size - 4, hash, 0); |
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167 |
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168 pk_init(&pub_key_ctx); |
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169 |
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170 ret = pk_parse_public_key(&pub_key_ctx, public_key_pem, |
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171 public_key_pem_size); |
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172 if (ret != 0) |
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173 { |
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174 ERRORPRINTF ("pk_parse_public_key failed with -0x%04x\n\n", -ret); |
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175 pk_free(&pub_key_ctx); |
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176 return ret; |
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177 } |
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178 |
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179 ret = pk_verify(&pub_key_ctx, POLARSSL_MD_SHA256, hash, 0, |
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180 signature, sig_size); |
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181 |
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182 if (ret != 0) |
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183 { |
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184 ERRORPRINTF ("pk_verify failed with -0x%04x\n\n", -ret); |
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185 } |
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186 pk_free(&pub_key_ctx); |
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187 |
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188 return ret; |
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189 } |
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190 |
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191 list_status_t read_and_verify_list(const char *file_name, char **data, |
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192 size_t *size) |
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193 { |
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194 list_status_t retval = UnknownError; |
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195 *data = NULL; |
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196 *size = 0; |
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197 int ret = 0; |
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198 |
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199 ret = read_file(file_name, data, size, MAX_FILESIZE, NULL); |
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200 |
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201 /* printf ("Ret: %i \n", ret); */ |
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202 if (ret != 0) |
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203 { |
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204 if (ret == READ_FILE_TOO_LARGE) |
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205 { |
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206 return TooLarge; |
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207 } |
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208 if (ret == READ_FILE_UNREADABLE) |
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209 { |
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210 return SeekFailed; |
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211 } |
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212 if (ret == READ_FILE_READ_FAILED) |
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213 { |
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214 return ReadFailed; |
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215 } |
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216 return UnknownError; |
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217 } |
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218 |
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219 if (!*data || !*size) |
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220 { |
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221 /* File is probably empty */ |
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222 return UnknownError; |
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223 } |
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224 |
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225 if (**data != 'S') |
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226 { |
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227 retval = InvalidFormat; |
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228 } |
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229 else |
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230 { |
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231 ret = verify_list (*data, *size); |
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232 if (ret == 0) |
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233 { |
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234 /* Hooray */ |
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235 return Valid; |
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236 } |
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237 if (ret == -1) |
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238 { |
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239 /* our error */ |
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240 retval = InvalidFormat; |
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241 } |
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242 else |
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243 { |
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244 retval = InvalidSignature; |
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245 } |
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246 } |
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247 |
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248 if (retval != Valid && *data) |
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249 { |
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250 free(*data); |
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251 *data = NULL; |
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252 *size = 0; |
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253 } |
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254 return retval; |
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255 } |
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256 |
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257 char ** |
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258 get_certs_from_list (char *data, const size_t size) |
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259 { |
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260 char *cur = data; |
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261 char **retval = NULL; |
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262 |
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263 if (!data || !size) |
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264 { |
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Replace "normal printfs" with DEBUG / ERROR printf macros
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265 ERRORPRINTF ("Invalid call to get_certs_to_remove \n"); |
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266 return NULL; |
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267 } |
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268 |
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269 while (cur) |
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270 { |
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271 char *next = strchr(cur, '\n'); |
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272 if (strlen(cur) > 3 && (cur[0] == 'I' || cur[0] == 'R') && |
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273 next - cur > 4) |
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274 { |
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Do not cut off the last character of the line. (next-cur does not include \n)
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275 size_t len = (size_t) (next - cur - 3); |
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276 /* Remove I: or R: at the beginning and \r\n at the end */ |
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277 strv_append(&retval, cur + 2, len); |
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278 } |
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279 cur = next ? (next + 1) : NULL; |
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280 } |
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281 return retval; |
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282 } |
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283 |