Mercurial > trustbridge

annotate cinst/main.c @ 396:26651cc0cc47

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Remove all certificates if a new list is loaded from file.
author Raimund Renkert <rrenkert@intevation.de>
date Tue, 15 Apr 2014 16:45:37 +0200
parents 5fa58979cb3a
children 124f08a85532
rev   line source
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1 /**
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2 * @file main.c
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3 * @brief Main entry point for the cinst process.
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4 *
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5 * The cinst process may or may not be run with elevated
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6 * privileges. When run with elevated privileges this
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7 * process will modify system wide certificate stores.
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8 * Otherwise only the users certificate stores are modified.
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9 *
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10 * The first parameter to this process should be list=<file_name>
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11 * of the certificate list to work on. The second parameter should
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12 * be instruction=<instruction_file_name>|uninstall
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13 *
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14 * instruction_file_name should be the absolute path to an
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15 * instructions file formatted as:
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16 *
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17 * I:<certificate>
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18 * R:<certificate>
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19 *
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20 * Line breaks can be system dependent in the Instructions file.
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21 *
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22 * It will only execute the instructions if the
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23 * I and R instructions are also part of the signed
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24 * certificate list. The signature is validated with the
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25 * built in key.
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26 *
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27 * The special instruction "uninstall" will cause the installer
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28 * to remove all certificates (Even those marked with I) that
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29 * are part of the list.
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30 *
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31 **/
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32 #include <stdio.h>
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33 #include <stdlib.h>
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34 #include <string.h>
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35 #include <assert.h>
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36 #include <stdbool.h>
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38 #include "strhelp.h"
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39 #include "listutil.h"
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40 #include "logging.h"
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41 #include "errorcodes.h"
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42 #include "windowsstore.h"
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43 #include "nssstore.h"
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44
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45 /* The certificate list + instructions may only be so long as
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46 * twice the accepted certificatelist size */
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47 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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48
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49 /* @brief Read stdin into data structures.
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50 *
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51 * Reads instructions from an input file into the to_install
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52 * and to_remove buffers.
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53 *
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54 * Lines starting with I: are treated as install instructions.
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55 * Lines starting with R: are treated as remove instructions.
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56 * Other lines are ignored.
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57 *
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58 * Terminates in OOM conditions.
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59 *
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60 * The caller needs to free the memory allocated by this function
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61 * even when an error is returned.
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62 *
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63 * @param[in] file_name absolute path to the instructions file.
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64 * @param[out] to_install strv of installation instructions or NULL
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65 * @param[out] to_remove strv of remove instructions or NULL
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66 *
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67 * @returns: 0 on success. An error code otherwise.
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68 */
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69 static int
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70 read_instructions_file (char *file_name, char ***to_install,
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71 char ***to_remove)
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72 {
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73 int lines_read = 0;
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74 char buf[MAX_LINE_LENGTH + 2];
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75 FILE *f = NULL;
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76 long file_size;
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77
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78 if (*to_install || *to_remove)
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79 {
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80 printf ("Error invalid parameters.\n");
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81 return -1;
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82 }
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83
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84 f = fopen (file_name, "rb");
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85 if (f == NULL)
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86 return ERR_NO_INSTRUCTIONS;
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87
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88 fseek (f, 0, SEEK_END);
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89 file_size = ftell (f);
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90 if (file_size <= 0)
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91 {
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92 fclose (f);
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93 return ERR_NO_INSTRUCTIONS;
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94 }
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95
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96 fseek (f, 0, SEEK_SET);
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97
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98 if (file_size + 1 == 0)
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99 {
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100 fclose (f);
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101 return ERR_INVALID_INSTRUCTIONS;
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102 }
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103
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104 while (fgets (buf, MAX_LINE_LENGTH + 1, f) )
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105 {
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106 size_t len = strlen (buf); /* fgets ensures buf is terminated */
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107 if (len <= 3)
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108 {
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109 printf ("Line too short.\n");
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110 fclose (f);
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111 return ERR_INVALID_INPUT;
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112 }
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113 if (lines_read++ > MAX_LINES)
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114 {
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115 printf ("Too many lines\n");
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116 fclose (f);
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117 return ERR_TOO_MUCH_INPUT;
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118 }
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119 if (*buf == 'I')
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120 {
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121 char *trimmed = buf+2;
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122 /* Remove leading I: and trailing whitespace */
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123 str_trim(&trimmed);
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124 strv_append (to_install, trimmed, strlen(trimmed));
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125 continue;
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126 }
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127 if (*buf == 'R')
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128 {
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129 char *trimmed = buf+2;
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130 /* Remove leading R: and trailing whitespace */
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131 str_trim(&trimmed);
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132 strv_append (to_remove, trimmed, strlen(trimmed));
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133 continue;
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134 }
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parents: 26
diff changeset
135 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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parents: 26
diff changeset
136
339
5fa58979cb3a Fix ressource leak found by cppcheck
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diff changeset
137 fclose (f);
163
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138 return 0;
59
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diff changeset
139 }
148
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140
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141 /** @brief Check that the insturctions match to the list
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142 *
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143 * Only certificates part of the certificate_list are allowed
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144 * for installation.
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145 *
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146 * @param[in] all_certs strv of all valid certificates in a list
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147 * @param[in] to_validate strv of instructions
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148 *
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149 * @returns 0 on success, an error otherwise
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150 */
163
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151 int
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152 validate_instructions (char **all_certs, char **to_validate)
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
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153 {
163
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diff changeset
154 int i = 0, j = 0;
148
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155
163
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156 if (!all_certs || strv_length (all_certs) < 1)
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157 {
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158 /* Invalid parameters */
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159 return -1;
148
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160 }
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161
163
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162 if (to_validate == NULL)
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163 {
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164 /* Nothing is valid */
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165 return 0;
148
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166 }
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167
163
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168 for (i = 0; to_validate[i]; i++)
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169 {
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170 bool found = false;
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171 for (j = 0; all_certs[j]; j++)
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172 {
291
5ab445e6a4da Trim instruction lines to avoid line ending trouble
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173 if (strncmp (to_validate[i], all_certs[j], MAX_LINE_LENGTH) ==
163
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174 0)
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175 {
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176 found = true;
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diff changeset
177 break;
148
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178 }
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179 }
163
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180 if (!found)
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181 {
291
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182 DEBUGPRINTF ("Failed to find certificate; \n%s\n", to_validate[i]);
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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183 return ERR_INVALID_INSTRUCTIONS;
148
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184 }
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185 }
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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186
163
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diff changeset
187 return 0;
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
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diff changeset
188 }
148
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diff changeset
189
68
8ffbb48528ae Add certificate installation for windows
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190
163
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191 int
289
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diff changeset
192 main (int argc, char **argv)
163
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193 {
289
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194 /* TODO handle wchar arguments on Windows or do conversion dance */
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195 char **to_install = NULL,
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196 **to_remove = NULL,
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197 **all_valid_certs = NULL;
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198 int ret = -1;
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199
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200 char *certificate_list = NULL,
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201 *certificate_file_name = NULL,
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202 *instruction_file_name = NULL;
163
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203 size_t list_len = 0;
289
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204 list_status_t list_status;
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205 bool do_uninstall = false;
60
6acb1dae6185 Use strn functions and improve error handling.
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diff changeset
206
289
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207 /* Some very static argument parsing. list= and instructions= is only
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208 added to make it more transparent how this programm is called if
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diff changeset
209 a user looks at the detailed uac dialog. */
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210 if (argc != 3 || strncmp(argv[1], "list=", 5) != 0 ||
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211 strncmp(argv[2], "instructions=", 13) != 0)
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diff changeset
212 {
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213 ERRORPRINTF ("Invalid arguments.\n"
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214 "Expected arguments: list=<certificate_list> \n"
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diff changeset
215 " instructions=<instructions_file>|uninstall\n");
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216 return ERR_INVALID_PARAMS;
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diff changeset
217 }
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diff changeset
218
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219 certificate_file_name = strchr(argv[1], '=') + 1;
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220 instruction_file_name = strchr(argv[2], '=') + 1;
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diff changeset
221
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diff changeset
222 if (!certificate_file_name || !instruction_file_name)
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diff changeset
223 {
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diff changeset
224 ERRORPRINTF ("Invalid arguments.\n"
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diff changeset
225 "Expected arguments: list=<certificate_list> \n"
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diff changeset
226 " instructions=<instructions_file>|uninstall\n");
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diff changeset
227 return ERR_INVALID_PARAMS;
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diff changeset
228 }
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diff changeset
229
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diff changeset
230 if (strncmp(instruction_file_name, "uninstall", 9) == 0)
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diff changeset
231 {
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diff changeset
232 do_uninstall = true;
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diff changeset
233 instruction_file_name = NULL;
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diff changeset
234 }
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diff changeset
235
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diff changeset
236 list_status = read_and_verify_list (certificate_file_name, &certificate_list,
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diff changeset
237 &list_len);
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diff changeset
238
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
239 if (list_status != Valid)
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diff changeset
240 {
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parents: 247
diff changeset
241 if (list_status == InvalidSignature)
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diff changeset
242 {
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diff changeset
243 return ERR_INVALID_SIGNATURE;
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diff changeset
244 }
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diff changeset
245
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diff changeset
246 return ERR_INVALID_INPUT_NO_LIST;
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parents: 247
diff changeset
247 }
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diff changeset
248
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diff changeset
249 all_valid_certs = get_certs_from_list (certificate_list, list_len);
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diff changeset
250
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
251 if (!all_valid_certs)
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diff changeset
252 {
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diff changeset
253 /* Impossible */
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diff changeset
254 return -1;
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diff changeset
255 }
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diff changeset
256
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
257
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diff changeset
258 /* For uninstall we are done now */
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diff changeset
259 if (do_uninstall)
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diff changeset
260 {
290
b460d2cf088d Move ifdef for write_stores_win call lower so that do_uninstall is no longer unused on linux
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parents: 289
diff changeset
261 #ifdef WIN32
302
fac7e1b0e558 Add nss store calling function and use it in cinst
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diff changeset
262 ret = write_stores_win (NULL, all_valid_certs);
fac7e1b0e558 Add nss store calling function and use it in cinst
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parents: 299
diff changeset
263 if (ret != 0)
fac7e1b0e558 Add nss store calling function and use it in cinst
Andre Heinecke <andre.heinecke@intevation.de>
parents: 299
diff changeset
264 {
fac7e1b0e558 Add nss store calling function and use it in cinst
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parents: 299
diff changeset
265 ERRORPRINTF ("Failed to write windows stores retval: %i\n", ret);
fac7e1b0e558 Add nss store calling function and use it in cinst
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parents: 299
diff changeset
266 }
299
ccb00bf48b75 Fix misplaced endif
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parents: 297
diff changeset
267 #endif
302
fac7e1b0e558 Add nss store calling function and use it in cinst
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diff changeset
268 ret = write_stores_nss (NULL, all_valid_certs);
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parents: 299
diff changeset
269 return ret;
289
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diff changeset
270 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
271
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272 ret = read_instructions_file (instruction_file_name, &to_install,
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273 &to_remove);
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274
163
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275 if (ret)
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276 {
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277 return ret;
60
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278 }
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279
163
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280 if (!strv_length (to_install) && !strv_length (to_remove) )
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281 {
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282 return ERR_NO_INSTRUCTIONS;
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283 }
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284
163
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285 /* Check that the instructions are ok to execute */
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286 if (to_install)
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287 {
289
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288 ret = validate_instructions (all_valid_certs, to_install);
163
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289 if (ret)
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290 {
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291 return ret;
148
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292 }
64
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293 }
68
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294
163
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295 if (to_remove)
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296 {
289
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297 ret = validate_instructions (all_valid_certs, to_remove);
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298 if (ret)
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299 {
289
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300 return ret;
68
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301 }
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302 }
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303
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304 #ifdef WIN32
302
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305 ret = write_stores_win (to_install, to_remove);
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306 if (ret != 0)
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307 {
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308 ERRORPRINTF ("Failed to write windows stores retval: %i\n", ret);
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309 }
68
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310 #endif
302
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311 ret = write_stores_nss (to_install, to_remove);
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312 if (ret != 0)
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313 {
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314 ERRORPRINTF ("Failed to write nss stores");
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315 }
68
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316
163
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317 /* Make valgrind happy */
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318 strv_free (to_install);
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319 strv_free (to_remove);
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320 free (certificate_list);
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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321
163
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322 return 0;
25
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323 }
http://wald.intevation.org/projects/trustbridge/