Mercurial > trustbridge

annotate cinst/main.c @ 1080:898b1ddcca11

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help-de: new introduction; switched faq to tech-ref and added arbeitsweise.
author Bernhard Reiter <bernhard@intevation.de>
date Thu, 11 Sep 2014 12:00:10 +0200
parents 1e429faf7c84
children fd7d04bb37cb
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 /**
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9 * @file main.c
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10 * @brief Main entry point for the cinst process.
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11 *
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12 * The cinst process may or may not be run with elevated
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13 * privileges. When run with elevated privileges this
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14 * process will modify system wide certificate stores.
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15 * Otherwise only the users certificate stores are modified.
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16 *
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17 * The first parameter to this process should be list=\<file_name\>
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18 * of the certificate list to work on. The second parameter should
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19 * be choices=\<choices_file_name\>|uninstall
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20 *
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21 * choices_file_name should be the absolute path to an
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22 * choices file formatted as:
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23 *
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24 * I:\<certificate\><BR>
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25 * R:\<certificate\>
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26 *
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27 * Line breaks can be system dependent in the Choices file.
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28 *
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29 * It will only execute the choices if the
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30 * I and R choices are also part of the signed
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31 * certificate list. The signature is validated with the
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32 * built in key.
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33 *
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34 * The special instruction "uninstall" will cause the installer
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35 * to remove all certificates (Even those marked with I) that
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36 * are part of the list.
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37 *
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38 * For more verbose debug output add --debug to the call.
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39 *
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40 **/
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41 #include <stdio.h>
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42 #include <stdlib.h>
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43 #include <string.h>
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44 #include <assert.h>
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45 #include <stdbool.h>
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46
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47 #include "strhelp.h"
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48 #include "listutil.h"
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49 #include "logging.h"
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50 #include "errorcodes.h"
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51 #include "windowsstore.h"
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52 #include "nssstore.h"
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53
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54 /* The certificate list + choices may only be so long as
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55 * twice the accepted certificatelist size */
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56 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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57
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58 /* @brief Read stdin into data structures.
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59 *
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60 * Reads choices from an input file into the to_install
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61 * and to_remove buffers.
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62 *
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63 * Lines starting with I: are treated as install choices.
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64 * Lines starting with R: are treated as remove choices.
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65 * Other lines are ignored.
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66 *
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67 * Terminates in OOM conditions.
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68 *
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69 * The caller needs to free the memory allocated by this function
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70 * even when an error is returned.
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71 *
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72 * @param[in] file_name absolute path to the choices file.
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73 * @param[out] to_install strv of installation choices or NULL
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74 * @param[out] to_remove strv of remove choices or NULL
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75 *
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76 * @returns: 0 on success. An error code otherwise.
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77 */
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78 static int
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79 read_choices_file (char *file_name, char ***to_install,
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80 char ***to_remove)
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81 {
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82 int lines_read = 0;
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83 char buf[MAX_LINE_LENGTH + 2];
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84 FILE *f = NULL;
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85 long file_size;
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86
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87 if (*to_install || *to_remove)
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88 {
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89 ERRORPRINTF ("Error invalid parameters.\n");
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90 return -1;
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91 }
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92
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93 f = fopen (file_name, "rb");
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94 if (f == NULL)
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95 {
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96 ERRORPRINTF ("Failed to open file: %s\n", file_name);
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97 return ERR_NO_INSTRUCTIONS;
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98 }
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99
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100 fseek (f, 0, SEEK_END);
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101 file_size = ftell (f);
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102 if (file_size <= 0)
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103 {
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104 fclose (f);
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105 ERRORPRINTF ("File size error: %s\n", file_name);
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106 return ERR_NO_INSTRUCTIONS;
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107 }
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108
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109 fseek (f, 0, SEEK_SET);
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110
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111 if (file_size + 1 == 0)
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112 {
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113 fclose (f);
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114 ERRORPRINTF ("File seek error: %s\n", file_name);
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115 return ERR_INVALID_INSTRUCTIONS;
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116 }
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117
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118 while (fgets (buf, MAX_LINE_LENGTH + 1, f) )
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119 {
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120 size_t len = strlen (buf); /* fgets ensures buf is terminated */
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121 if (len <= 3)
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122 {
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123 ERRORPRINTF ("Line too short.\n");
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124 fclose (f);
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125 return ERR_INVALID_INPUT;
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126 }
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127 if (lines_read++ > MAX_LINES)
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128 {
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129 ERRORPRINTF ("Too many lines\n");
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130 fclose (f);
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131 return ERR_TOO_MUCH_INPUT;
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132 }
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133 if (*buf == 'I')
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134 {
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135 char *trimmed = buf+2;
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diff changeset
136 /* Remove leading I: and trailing whitespace */
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diff changeset
137 str_trim(&trimmed);
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diff changeset
138 strv_append (to_install, trimmed, strlen(trimmed));
163
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diff changeset
139 continue;
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parents: 161
diff changeset
140 }
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parents: 161
diff changeset
141 if (*buf == 'R')
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parents: 161
diff changeset
142 {
291
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diff changeset
143 char *trimmed = buf+2;
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parents: 290
diff changeset
144 /* Remove leading R: and trailing whitespace */
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diff changeset
145 str_trim(&trimmed);
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diff changeset
146 strv_append (to_remove, trimmed, strlen(trimmed));
163
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diff changeset
147 continue;
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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parents: 26
diff changeset
148 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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parents: 26
diff changeset
149 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
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parents: 26
diff changeset
150
339
5fa58979cb3a Fix ressource leak found by cppcheck
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diff changeset
151 fclose (f);
163
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diff changeset
152 return 0;
59
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parents: 26
diff changeset
153 }
148
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diff changeset
154
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155 /** @brief Check that the insturctions match to the list
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156 *
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157 * Only certificates part of the certificate_list are allowed
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158 * for installation.
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159 *
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160 * @param[in] all_certs strv of all valid certificates in a list
382
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161 * @param[in] to_validate strv of choices
148
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162 *
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163 * @returns 0 on success, an error otherwise
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164 */
163
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165 int
382
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166 validate_choices (char **all_certs, char **to_validate)
64
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167 {
163
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diff changeset
168 int i = 0, j = 0;
148
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169
163
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170 if (!all_certs || strv_length (all_certs) < 1)
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171 {
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172 /* Invalid parameters */
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173 return -1;
148
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174 }
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175
163
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176 if (to_validate == NULL)
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177 {
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178 /* Nothing is valid */
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179 return 0;
148
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180 }
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181
163
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diff changeset
182 for (i = 0; to_validate[i]; i++)
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183 {
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184 bool found = false;
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185 for (j = 0; all_certs[j]; j++)
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186 {
291
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187 if (strncmp (to_validate[i], all_certs[j], MAX_LINE_LENGTH) ==
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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diff changeset
188 0)
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189 {
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190 found = true;
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diff changeset
191 break;
148
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192 }
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193 }
163
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diff changeset
194 if (!found)
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195 {
291
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196 DEBUGPRINTF ("Failed to find certificate; \n%s\n", to_validate[i]);
163
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197 return ERR_INVALID_INSTRUCTIONS;
148
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198 }
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199 }
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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200
163
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201 return 0;
64
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diff changeset
202 }
148
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203
1072
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204 #ifdef DO_RELEASE_BUILD
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205 bool g_debug = false;
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206 #else
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207 bool g_debug = true;
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208 #endif
68
8ffbb48528ae Add certificate installation for windows
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209
163
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210 int
289
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diff changeset
211 main (int argc, char **argv)
163
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212 {
289
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213 /* TODO handle wchar arguments on Windows or do conversion dance */
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diff changeset
214 char **to_install = NULL,
905
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215 **to_remove = NULL,
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diff changeset
216 **all_valid_certs = NULL;
289
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diff changeset
217 int ret = -1;
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diff changeset
218
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219 char *certificate_list = NULL,
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diff changeset
220 *certificate_file_name = NULL,
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diff changeset
221 *choices_file_name = NULL;
163
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diff changeset
222 size_t list_len = 0;
289
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diff changeset
223 list_status_t list_status;
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224 bool do_uninstall = false;
60
6acb1dae6185 Use strn functions and improve error handling.
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diff changeset
225
382
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226 /* Some very static argument parsing. list= and choices= is only
289
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diff changeset
227 added to make it more transparent how this programm is called if
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diff changeset
228 a user looks at the detailed uac dialog. */
1060
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229 if ((argc != 3 && argc != 4) || strncmp(argv[1], "list=", 5) != 0 ||
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230 strncmp(argv[2], "choices=", 8) != 0)
289
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diff changeset
231 {
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232 ERRORPRINTF ("Invalid arguments.\n"
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233 "Expected arguments: list=<certificate_list> \n"
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234 " choices=<choices_file>|uninstall\n"
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235 "Optional: --debug\n");
289
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
236 return ERR_INVALID_PARAMS;
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diff changeset
237 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
238
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
239 certificate_file_name = strchr(argv[1], '=') + 1;
382
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diff changeset
240 choices_file_name = strchr(argv[2], '=') + 1;
289
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diff changeset
241
1060
317ee9dc4684 (issue46) Make debug output optional in cinst and mozilla and propagate its setting.
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diff changeset
242 if (argc == 4 && strncmp(argv[3], "--debug", 7) == 0)
317ee9dc4684 (issue46) Make debug output optional in cinst and mozilla and propagate its setting.
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diff changeset
243 {
317ee9dc4684 (issue46) Make debug output optional in cinst and mozilla and propagate its setting.
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diff changeset
244 g_debug = true;
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diff changeset
245 }
317ee9dc4684 (issue46) Make debug output optional in cinst and mozilla and propagate its setting.
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diff changeset
246
382
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diff changeset
247 if (!certificate_file_name || !choices_file_name)
289
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diff changeset
248 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
249 ERRORPRINTF ("Invalid arguments.\n"
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
250 "Expected arguments: list=<certificate_list> \n"
382
124f08a85532 Rename instructions to choices
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diff changeset
251 " choices=<choices_file>|uninstall\n");
289
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
252 return ERR_INVALID_PARAMS;
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diff changeset
253 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
254
382
124f08a85532 Rename instructions to choices
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diff changeset
255 if (strncmp(choices_file_name, "uninstall", 9) == 0)
289
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diff changeset
256 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
257 do_uninstall = true;
382
124f08a85532 Rename instructions to choices
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diff changeset
258 choices_file_name = NULL;
289
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
259 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
260
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
261 list_status = read_and_verify_list (certificate_file_name, &certificate_list,
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diff changeset
262 &list_len);
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diff changeset
263
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
264 if (list_status != Valid)
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diff changeset
265 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
266 if (list_status == InvalidSignature)
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
267 {
382
124f08a85532 Rename instructions to choices
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diff changeset
268 ERRORPRINTF ("Failed to verify signature.\n");
289
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
269 return ERR_INVALID_SIGNATURE;
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parents: 247
diff changeset
270 }
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271
382
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272 ERRORPRINTF ("Failed to read certificate list.\n");
289
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273 return ERR_INVALID_INPUT_NO_LIST;
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274 }
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275
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276 all_valid_certs = get_certs_from_list (certificate_list, list_len);
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277 free (certificate_list);
289
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278
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279 if (!all_valid_certs)
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280 {
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281 /* Impossible */
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282 return -1;
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283 }
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284
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285
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286 /* For uninstall we are done now */
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287 if (do_uninstall)
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288 {
290
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289 #ifdef WIN32
302
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290 ret = write_stores_win (NULL, all_valid_certs);
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291 if (ret != 0)
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292 {
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293 ERRORPRINTF ("Failed to write windows stores retval: %i\n", ret);
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294 }
299
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295 #endif
302
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296 ret = write_stores_nss (NULL, all_valid_certs);
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297 strv_free (all_valid_certs);
302
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298 return ret;
289
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299 }
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300
382
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301 ret = read_choices_file (choices_file_name, &to_install,
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302 &to_remove);
148
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303
163
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304 if (ret)
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305 {
382
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306 ERRORPRINTF ("Failed to read choices file\n");
163
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307 return ret;
60
6acb1dae6185 Use strn functions and improve error handling.
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308 }
6acb1dae6185 Use strn functions and improve error handling.
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309
163
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310 if (!strv_length (to_install) && !strv_length (to_remove) )
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311 {
382
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312 ERRORPRINTF ("Failed to read choices file\n");
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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313 return ERR_NO_INSTRUCTIONS;
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
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diff changeset
314 }
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315
382
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316 /* Check that the choices are ok to execute */
163
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317 if (to_install)
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diff changeset
318 {
382
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319 ret = validate_choices (all_valid_certs, to_install);
163
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diff changeset
320 if (ret)
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diff changeset
321 {
382
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diff changeset
322 ERRORPRINTF ("Failed to validate choices\n");
163
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diff changeset
323 return ret;
148
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
324 }
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
325 }
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
326
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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parents: 161
diff changeset
327 if (to_remove)
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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parents: 161
diff changeset
328 {
382
124f08a85532 Rename instructions to choices
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diff changeset
329 ret = validate_choices (all_valid_certs, to_remove);
289
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
330 if (ret)
163
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diff changeset
331 {
382
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diff changeset
332 ERRORPRINTF ("Failed to validate removal choices\n");
289
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
333 return ret;
68
8ffbb48528ae Add certificate installation for windows
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parents: 65
diff changeset
334 }
8ffbb48528ae Add certificate installation for windows
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diff changeset
335 }
8ffbb48528ae Add certificate installation for windows
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diff changeset
336
944
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337 strv_free (all_valid_certs);
76c410aff382 Fix two "memory leaks"
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338
68
8ffbb48528ae Add certificate installation for windows
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diff changeset
339 #ifdef WIN32
302
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diff changeset
340 ret = write_stores_win (to_install, to_remove);
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diff changeset
341 if (ret != 0)
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Andre Heinecke <andre.heinecke@intevation.de>
parents: 299
diff changeset
342 {
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diff changeset
343 ERRORPRINTF ("Failed to write windows stores retval: %i\n", ret);
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diff changeset
344 }
68
8ffbb48528ae Add certificate installation for windows
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diff changeset
345 #endif
302
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diff changeset
346 ret = write_stores_nss (to_install, to_remove);
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parents: 299
diff changeset
347 if (ret != 0)
fac7e1b0e558 Add nss store calling function and use it in cinst
Andre Heinecke <andre.heinecke@intevation.de>
parents: 299
diff changeset
348 {
fac7e1b0e558 Add nss store calling function and use it in cinst
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
349 ERRORPRINTF ("Failed to write nss stores");
fac7e1b0e558 Add nss store calling function and use it in cinst
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parents: 299
diff changeset
350 }
68
8ffbb48528ae Add certificate installation for windows
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parents: 65
diff changeset
351
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
352 /* Make valgrind happy */
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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parents: 161
diff changeset
353 strv_free (to_install);
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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parents: 161
diff changeset
354 strv_free (to_remove);
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
355
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
356 return 0;
25
92108a2120f1 Move certificatelist to common. Add cinst directory
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
357 }
http://wald.intevation.org/projects/trustbridge/