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annotate cinst/main.c @ 291:5ab445e6a4da

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Trim instruction lines to avoid line ending trouble
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 02 Apr 2014 15:35:12 +0000
parents b460d2cf088d
children f733f4aa2a90
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
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44 /* The certificate list + instructions may only be so long as
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45 * twice the accepted certificatelist size */
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46 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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47
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48 /* @brief Read stdin into data structures.
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49 *
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50 * Reads instructions from an input file into the to_install
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51 * and to_remove buffers.
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52 *
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53 * Lines starting with I: are treated as install instructions.
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54 * Lines starting with R: are treated as remove instructions.
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55 * Other lines are ignored.
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56 *
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57 * Terminates in OOM conditions.
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58 *
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59 * The caller needs to free the memory allocated by this function
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60 * even when an error is returned.
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61 *
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62 * @param[in] file_name absolute path to the instructions file.
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63 * @param[out] to_install strv of installation instructions or NULL
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64 * @param[out] to_remove strv of remove instructions or NULL
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65 *
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66 * @returns: 0 on success. An error code otherwise.
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67 */
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68 static int
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69 read_instructions_file (char *file_name, char ***to_install,
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70 char ***to_remove)
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71 {
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72 int lines_read = 0;
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73 char buf[MAX_LINE_LENGTH + 2];
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74 FILE *f = NULL;
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75 long file_size;
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76
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77 if (*to_install || *to_remove)
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78 {
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79 printf ("Error invalid parameters.\n");
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80 return -1;
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81 }
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82
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83 f = fopen (file_name, "rb");
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84 if (f == NULL)
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85 return ERR_NO_INSTRUCTIONS;
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86
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87 fseek (f, 0, SEEK_END);
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88 file_size = ftell (f);
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89 if (file_size <= 0)
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90 {
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91 fclose (f);
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92 return ERR_NO_INSTRUCTIONS;
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93 }
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94
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95 fseek (f, 0, SEEK_SET);
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96
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97 if (file_size + 1 == 0)
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98 {
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99 fclose (f);
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100 return ERR_INVALID_INSTRUCTIONS;
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101 }
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102
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103 while (fgets (buf, MAX_LINE_LENGTH + 1, f) )
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104 {
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105 size_t len = strlen (buf); /* fgets ensures buf is terminated */
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106 if (len <= 3)
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107 {
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108 printf ("Line too short.\n");
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109 return ERR_INVALID_INPUT;
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110 }
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111 if (lines_read++ > MAX_LINES)
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112 {
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113 printf ("Too many lines\n");
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114 return ERR_TOO_MUCH_INPUT;
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115 }
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116 if (*buf == 'I')
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117 {
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118 char *trimmed = buf+2;
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119 /* Remove leading I: and trailing whitespace */
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120 str_trim(&trimmed);
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121 strv_append (to_install, trimmed, strlen(trimmed));
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122 continue;
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123 }
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124 if (*buf == 'R')
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125 {
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126 char *trimmed = buf+2;
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127 /* Remove leading R: and trailing whitespace */
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128 str_trim(&trimmed);
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129 strv_append (to_remove, trimmed, strlen(trimmed));
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130 continue;
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131 }
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132 }
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133
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134 return 0;
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135 }
148
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136
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137 /** @brief Check that the insturctions match to the list
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138 *
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139 * Only certificates part of the certificate_list are allowed
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140 * for installation.
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141 *
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142 * @param[in] all_certs strv of all valid certificates in a list
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143 * @param[in] to_validate strv of instructions
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144 *
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145 * @returns 0 on success, an error otherwise
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146 */
163
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147 int
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148 validate_instructions (char **all_certs, char **to_validate)
64
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149 {
163
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150 int i = 0, j = 0;
148
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151
163
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152 if (!all_certs || strv_length (all_certs) < 1)
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153 {
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154 /* Invalid parameters */
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155 return -1;
148
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156 }
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157
163
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158 if (to_validate == NULL)
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159 {
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160 /* Nothing is valid */
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161 return 0;
148
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162 }
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163
163
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164 for (i = 0; to_validate[i]; i++)
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165 {
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166 bool found = false;
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167 for (j = 0; all_certs[j]; j++)
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168 {
291
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169 if (strncmp (to_validate[i], all_certs[j], MAX_LINE_LENGTH) ==
163
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170 0)
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171 {
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172 found = true;
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173 break;
148
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174 }
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175 }
163
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176 if (!found)
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177 {
291
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178 DEBUGPRINTF ("Failed to find certificate; \n%s\n", to_validate[i]);
163
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179 return ERR_INVALID_INSTRUCTIONS;
148
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180 }
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181 }
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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182
163
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183 return 0;
64
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184 }
148
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185
68
8ffbb48528ae Add certificate installation for windows
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186
163
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187 int
289
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188 main (int argc, char **argv)
163
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189 {
289
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190 /* TODO handle wchar arguments on Windows or do conversion dance */
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191 char **to_install = NULL,
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192 **to_remove = NULL,
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193 **all_valid_certs = NULL;
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194 int ret = -1;
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195
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196 char *certificate_list = NULL,
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197 *certificate_file_name = NULL,
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198 *instruction_file_name = NULL;
163
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199 size_t list_len = 0;
289
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200 list_status_t list_status;
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201 bool do_uninstall = false;
60
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202
289
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203 /* Some very static argument parsing. list= and instructions= is only
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204 added to make it more transparent how this programm is called if
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205 a user looks at the detailed uac dialog. */
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206 if (argc != 3 || strncmp(argv[1], "list=", 5) != 0 ||
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207 strncmp(argv[2], "instructions=", 13) != 0)
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208 {
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209 ERRORPRINTF ("Invalid arguments.\n"
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210 "Expected arguments: list=<certificate_list> \n"
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211 " instructions=<instructions_file>|uninstall\n");
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212 return ERR_INVALID_PARAMS;
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213 }
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214
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215 certificate_file_name = strchr(argv[1], '=') + 1;
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216 instruction_file_name = strchr(argv[2], '=') + 1;
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diff changeset
217
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218 if (!certificate_file_name || !instruction_file_name)
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219 {
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220 ERRORPRINTF ("Invalid arguments.\n"
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221 "Expected arguments: list=<certificate_list> \n"
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222 " instructions=<instructions_file>|uninstall\n");
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223 return ERR_INVALID_PARAMS;
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diff changeset
224 }
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diff changeset
225
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226 if (strncmp(instruction_file_name, "uninstall", 9) == 0)
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227 {
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228 do_uninstall = true;
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229 instruction_file_name = NULL;
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230 }
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231
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232 list_status = read_and_verify_list (certificate_file_name, &certificate_list,
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diff changeset
233 &list_len);
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diff changeset
234
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diff changeset
235 if (list_status != Valid)
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diff changeset
236 {
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diff changeset
237 if (list_status == InvalidSignature)
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diff changeset
238 {
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239 return ERR_INVALID_SIGNATURE;
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diff changeset
240 }
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diff changeset
241
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diff changeset
242 return ERR_INVALID_INPUT_NO_LIST;
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diff changeset
243 }
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diff changeset
244
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245 all_valid_certs = get_certs_from_list (certificate_list, list_len);
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diff changeset
246
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diff changeset
247 if (!all_valid_certs)
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diff changeset
248 {
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diff changeset
249 /* Impossible */
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250 return -1;
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diff changeset
251 }
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diff changeset
252
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diff changeset
253
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diff changeset
254 /* For uninstall we are done now */
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diff changeset
255 if (do_uninstall)
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diff changeset
256 {
290
b460d2cf088d Move ifdef for write_stores_win call lower so that do_uninstall is no longer unused on linux
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diff changeset
257 #ifdef WIN32
289
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diff changeset
258 return write_stores_win (NULL, all_valid_certs);
290
b460d2cf088d Move ifdef for write_stores_win call lower so that do_uninstall is no longer unused on linux
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diff changeset
259 #else
b460d2cf088d Move ifdef for write_stores_win call lower so that do_uninstall is no longer unused on linux
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diff changeset
260 /*TODO*/
289
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diff changeset
261 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
262 #endif
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diff changeset
263
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diff changeset
264 ret = read_instructions_file (instruction_file_name, &to_install,
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diff changeset
265 &to_remove);
148
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
266
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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parents: 161
diff changeset
267 if (ret)
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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diff changeset
268 {
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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diff changeset
269 return ret;
60
6acb1dae6185 Use strn functions and improve error handling.
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diff changeset
270 }
6acb1dae6185 Use strn functions and improve error handling.
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parents: 59
diff changeset
271
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
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272 if (!strv_length (to_install) && !strv_length (to_remove) )
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273 {
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274 return ERR_NO_INSTRUCTIONS;
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275 }
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276
163
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277 /* Check that the instructions are ok to execute */
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278 if (to_install)
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279 {
289
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280 ret = validate_instructions (all_valid_certs, to_install);
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281 if (ret)
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282 {
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283 return ret;
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284 }
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285 }
68
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286
163
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287 if (to_remove)
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288 {
289
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289 ret = validate_instructions (all_valid_certs, to_remove);
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290 if (ret)
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291 {
289
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292 return ret;
68
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293 }
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294 }
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295
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296 #ifdef WIN32
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297 return write_stores_win (to_install, to_remove);
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298 #endif
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299
163
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300 /* Make valgrind happy */
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301 strv_free (to_install);
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302 strv_free (to_remove);
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303 free (certificate_list);
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304
163
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305 return 0;
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306 }
http://wald.intevation.org/projects/trustbridge/