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annotate common/listutil.c @ 754:27043d74dc90

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(Issue25) Align header contents in their own column. We now also stretch column 3 so that the contents are aligned with the descriptive labels without a space in between. Sadly this causes the quit button to be resized to it's minimum instead of sharing the space with the installation button as the installation button is so large that it squeezes the push button.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 07 Jul 2014 12:38:33 +0200
parents aa48ea7ead1f
children 44257ecdae6d
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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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 #include "strhelp.h"
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20 #include "logging.h"
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21
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22 #ifdef RELEASE_BUILD
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23 #include "pubkey-release.h"
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24 #else
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25 #include "pubkey-test.h"
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26 #endif
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27
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28 #pragma GCC diagnostic ignored "-Wconversion"
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29 /* Polarssl mh.h contains a conversion which gcc warns about */
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30 #include <polarssl/pk.h>
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31 #include <polarssl/base64.h>
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32 #include <polarssl/sha256.h>
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33 #pragma GCC diagnostic pop
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34
178
b0579d4fa186 Made macro MAX_FILESIZE saver with brackets. A perror debugging line.
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35 #define MAX_FILESIZE (MAX_LINE_LENGTH * MAX_LINES)
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36
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37 /**
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38 * @brief Read a file into memory.
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39 *
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40 * The caller needs to free data
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41 *
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42 * @param[in] fileName Name of the file.
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43 * @param[out] data the file content
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44 * @param[out] size size in bytes of the file content.
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45 * @param[in] max_size the maximum amount of bytes to read.
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46 *
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47 * @return 0 on success an error code otherwise.
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48 */
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49 #define READ_FILE_UNREADABLE -1
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50 #define READ_FILE_TOO_LARGE -2
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51 #define READ_FILE_NO_MEMORY -3
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52 #define READ_FILE_READ_FAILED -4
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53 #define READ_FILE_INVALID_CALL -5
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54 static int read_file(const char *file_name, char **data, size_t *size,
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55 const size_t max_size)
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56 {
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57 FILE *f;
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58 long file_size;
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59
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60 if (!file_name || !data || !size || !max_size) {
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61 return READ_FILE_INVALID_CALL;
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62 }
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63
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64 f = fopen(file_name, "rb");
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65 if (f == NULL)
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66 return READ_FILE_UNREADABLE;
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67
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68 fseek(f, 0, SEEK_END);
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69 file_size = ftell(f);
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70 if (file_size <= 0){
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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 fclose(f);
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79 return READ_FILE_TOO_LARGE;
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80 }
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81 *size = (size_t) file_size;
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82
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83 if (*size > max_size) {
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84 fclose(f);
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85 return READ_FILE_TOO_LARGE;
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86 }
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87
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88 *data = (char *) malloc( *size + 1 );
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89 if (*data == NULL) {
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90 fclose(f);
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91 return READ_FILE_NO_MEMORY;
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92 }
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93
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94 if (fread(*data, 1, *size, f) != *size) {
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4f79cf993737 Tiny improvement: free resources first that you have aquired last. Added TODO for better error reporting.
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95 free(*data);
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96 fclose(f);
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97 return READ_FILE_READ_FAILED;
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98 }
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99
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100 fclose(f);
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101
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102 (*data)[*size] = '\0';
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103
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104 return 0;
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105 }
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106
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107 int verify_list(const char *data, const size_t size)
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108 {
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109 int ret = -1;
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110 pk_context pub_key_ctx;
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111 char *p;
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112 /* Fixed key size of 3072 implies the sizes*/
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113 const size_t sig_b64_size = 512;
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114 size_t sig_size = 384;
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115
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116 char signature_b64[sig_b64_size + 1];
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117 unsigned char signature[sig_size];
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118 /* Hash algroithm is sha256 */
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119 unsigned char hash[32];
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120
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121 if (!data || !size) {
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122 return -1;
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123 }
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124
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125 /* Fetch the signature from the first line od data */
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126 p = strchr(data, '\r');
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127 if (p == 0 || (unsigned int)(p - (data + 2)) != sig_b64_size) {
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128 /* printf("Invalid data. Signature might be too long.\n"); */
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129 return -1;
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130 }
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131 strncpy(signature_b64, data + 2, sig_b64_size);
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132 signature_b64[sig_b64_size] = '\0';
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133
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134 ret = base64_decode(signature, &sig_size,
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135 (unsigned char *)signature_b64, sig_b64_size);
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136
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137 if (ret != 0 || sig_size != 384) {
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138 /* printf("failed to decode signature\n"); */
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139 return -1;
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140 }
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141
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142 /* Hash is calculated over the data without the first line.
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143 * linebreaks are \r\n so the first char of the new line is
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144 * p+2 */
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145 p += 2;
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146 /* Size of the data to hash is the size - signature line
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147 * signature line is sig_b64_size - "S:" and - "\r\n" so -4*/
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148 sha256((unsigned char *)p, size - sig_b64_size - 4, hash, 0);
28
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149
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150 pk_init(&pub_key_ctx);
31
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151 #if 0
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152 {
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153 int i;
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154 FILE *foo = fopen("/tmp/testdump", "w");
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155 FILE *foo2 = fopen("/tmp/rawdump", "w");
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156 for (i=0; i< (int)(size - sig_b64_size - 2); i++)
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157 fprintf (foo, "%c", p[i]);
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158 for (i=0; i< (int)(size); i++)
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159 fprintf (foo2, "%c", data[i]);
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160 fclose(foo);
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161 printf ("Hash: \n");
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162 for (i=0; i<32; i++) {
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163 printf ("%x", hash[i]);
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164 }
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165 printf("\n");
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166 }
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diff changeset
167 #endif
28
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diff changeset
168
31
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169 ret = pk_parse_public_key(&pub_key_ctx, public_key_pem,
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170 public_key_pem_size);
28
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diff changeset
171 if (ret != 0) {
626
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172 ERRORPRINTF ("pk_parse_public_key failed with -0x%04x\n\n", -ret);
31
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173 pk_free(&pub_key_ctx);
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174 return ret;
28
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diff changeset
175 }
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parents: 22
diff changeset
176
31
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diff changeset
177 ret = pk_verify(&pub_key_ctx, POLARSSL_MD_SHA256, hash, 0,
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diff changeset
178 signature, sig_size);
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diff changeset
179
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180 if (ret != 0) {
626
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diff changeset
181 ERRORPRINTF ("pk_verify failed with -0x%04x\n\n", -ret);
31
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diff changeset
182 }
28
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183 pk_free(&pub_key_ctx);
31
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diff changeset
184
28
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185 return ret;
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186 }
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187
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diff changeset
188 list_status_t read_and_verify_list(const char *file_name, char **data,
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189 size_t *size)
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190 {
4
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191 list_status_t retval = UnknownError;
7
992c0ec57660 Add unit tests make CertificateList work.
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192 *data = NULL;
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193 *size = 0;
31
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194 int ret = 0;
4
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195
31
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196 ret = read_file(file_name, data, size, MAX_FILESIZE);
4
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197
40
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198 /* printf ("Ret: %i \n", ret); */
31
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199 if (ret != 0) {
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200 if (ret == READ_FILE_TOO_LARGE) {
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201 return TooLarge;
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202 }
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diff changeset
203 if (ret == READ_FILE_UNREADABLE) {
66
4f79cf993737 Tiny improvement: free resources first that you have aquired last. Added TODO for better error reporting.
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parents: 61
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204 /* TODO: work with errno ? */
178
b0579d4fa186 Made macro MAX_FILESIZE saver with brackets. A perror debugging line.
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205 /* errsv = errno; */
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206 /* perror("read_and_verify_list(), READ_FILE_UNREADABLE:"); */
31
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207 return SeekFailed;
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208 }
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diff changeset
209 if (ret == READ_FILE_READ_FAILED) {
66
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diff changeset
210 /* TODO: work with ferror() or feof() ? */
31
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diff changeset
211 return ReadFailed;
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diff changeset
212 }
4
9849250f50f2 Start implementation of certificatelist parser
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213 return UnknownError;
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214 }
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diff changeset
215
31
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diff changeset
216 if (!*data || !*size) {
40
5cb1eb928253 Clean up debug output / functions
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diff changeset
217 /* File is probably empty */
31
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diff changeset
218 return UnknownError;
4
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diff changeset
219 }
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parents:
diff changeset
220
31
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diff changeset
221 if (**data != 'S') {
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diff changeset
222 retval = InvalidFormat;
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diff changeset
223 } else {
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diff changeset
224 ret = verify_list (*data, *size);
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diff changeset
225 if (ret == 0) {
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diff changeset
226 /* Hooray */
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227 return Valid;
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diff changeset
228 }
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diff changeset
229 if (ret == -1) {
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diff changeset
230 /* our error */
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231 retval = InvalidFormat;
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diff changeset
232 } else {
92
4980b0deb773 Fix memleak in case of invalid signature
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diff changeset
233 retval = InvalidSignature;
31
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diff changeset
234 }
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diff changeset
235 }
9
2ad9a96518e3 Actually parse all elements in the list
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parents: 7
diff changeset
236
7
992c0ec57660 Add unit tests make CertificateList work.
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parents: 4
diff changeset
237 if (retval != Valid && *data) {
992c0ec57660 Add unit tests make CertificateList work.
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parents: 4
diff changeset
238 free(*data);
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diff changeset
239 *data = NULL;
4
9849250f50f2 Start implementation of certificatelist parser
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240 *size = 0;
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241 }
9849250f50f2 Start implementation of certificatelist parser
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242 return retval;
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243 }
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parents:
diff changeset
244
286
881ce5126f07 Add helper function to get all certificates in a list
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diff changeset
245 char **
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diff changeset
246 get_certs_from_list (char *data, const size_t size)
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parents: 178
diff changeset
247 {
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parents: 178
diff changeset
248 char *cur = data;
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parents: 178
diff changeset
249 char **retval = NULL;
68
8ffbb48528ae Add certificate installation for windows
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diff changeset
250
286
881ce5126f07 Add helper function to get all certificates in a list
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parents: 178
diff changeset
251 if (!data || !size)
881ce5126f07 Add helper function to get all certificates in a list
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parents: 178
diff changeset
252 {
626
f595fcbe3e76 Replace "normal printfs" with DEBUG / ERROR printf macros
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parents: 404
diff changeset
253 ERRORPRINTF ("Invalid call to get_certs_to_remove \n");
286
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parents: 178
diff changeset
254 return NULL;
68
8ffbb48528ae Add certificate installation for windows
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parents: 66
diff changeset
255 }
286
881ce5126f07 Add helper function to get all certificates in a list
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parents: 178
diff changeset
256
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Andre Heinecke <aheinecke@intevation.de>
parents: 178
diff changeset
257 while (cur)
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parents: 178
diff changeset
258 {
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parents: 178
diff changeset
259 char *next = strchr(cur, '\n');
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parents: 178
diff changeset
260 if (strlen(cur) > 3 && (cur[0] == 'I' || cur[0] == 'R') &&
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parents: 178
diff changeset
261 next - cur > 4)
881ce5126f07 Add helper function to get all certificates in a list
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parents: 178
diff changeset
262 {
292
57867a523dcf Do not cut off the last character of the line. (next-cur does not include \n)
Andre Heinecke <aheinecke@intevation.de>
parents: 286
diff changeset
263 size_t len = (size_t) (next - cur - 3);
286
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parents: 178
diff changeset
264 /* Remove I: or R: at the beginning and \r\n at the end */
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parents: 178
diff changeset
265 strv_append(&retval, cur + 2, len);
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parents: 178
diff changeset
266 }
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parents: 178
diff changeset
267 cur = next ? (next + 1) : NULL;
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parents: 178
diff changeset
268 }
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parents: 178
diff changeset
269 return retval;
68
8ffbb48528ae Add certificate installation for windows
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parents: 66
diff changeset
270 }
8ffbb48528ae Add certificate installation for windows
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parents: 66
diff changeset
271
http://wald.intevation.org/projects/trustbridge/