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annotate cinst/main.c @ 150:a99339d0dce8

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Fix test for invalid instructions The missing line break made it invalid_input and not an instruction.
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 24 Mar 2014 17:23:42 +0000
parents bd5a5d3e5674
children dbbd761959ae
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 * It expects a certificatelist on stdin enclosed in a
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11 * -----BEGIN CERTIFICATE LIST-----
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12 * ...
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13 * -----END CERTIFICATE LIST-----
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14 *
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15 * Followed by additional instruction lines of:
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16 * I:<certificate>
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17 * R:<certificate>
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18 *
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19 * It will only execute the instructions if the
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20 * I and R instructions are also part of the signed
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21 * certificate list. The signature is validated with the
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22 * built in key.
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23 *
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24 * The special instruction "UNINSTALL" will cause the installer
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25 * to remove all certificates (Even those marked with I) that
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26 * are part of the list to be removed.
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27 *
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28 **/
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <string.h>
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32 #include <assert.h>
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33 #include <stdbool.h>
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34
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35 #include "strhelp.h"
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36 #include "listutil.h"
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37 #include "errorcodes.h"
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38 #include "windowsstore.h"
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39
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40 /* The certificate list + instructions may only be so long as
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41 * twice the accepted certificatelist size */
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42 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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43
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44 /* @brief Read stdin into data structures.
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45 *
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46 * Reads from stdin and sorts the input into the respective
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47 * variables. The pointers returned need to be freed by the caller.
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48 * Terminates in OOM conditions.
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49 *
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50 * The caller needs to free the memory allocated by this function
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51 * even when an error is returned.
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52 *
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53 * Uninstall certificates are all certificates that are pa
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54 *
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55 * @param[out] certificate_list the parsed certificate list
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56 * @param[out] to_install strv of installation instructions or NULL
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57 * @param[out] to_remove strv of remove instructions or NULL
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58 * @param[out] all_certs strv of uninstallation instructions or NULL
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59 *
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60 * @returns: 0 on success. An error code otherwise.
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61 */
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62 int readInput(char **certificate_list, char ***to_install,
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63 char ***to_remove, char ***all_certs)
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64 {
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65 int lines_read = 0;
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66 int readingList = 0;
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67 size_t list_size = 0;
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68 char buf[MAX_LINE_LENGTH + 2];
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69
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70 if (*certificate_list || *to_install || *to_remove) {
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71 printf("Error invalid parameters\n");
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72 return -1;
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73 }
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74
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75 while (fgets(buf, MAX_LINE_LENGTH + 1, stdin)) {
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76 size_t len = strlen(buf); /* fgets ensures buf is terminated */
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77 if (len <= 3) {
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78 printf("Line too short.\n");
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79 return ERR_INVALID_INPUT;
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80 }
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81 if (lines_read ++ > MAX_LINES) {
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82 printf("Too many lines\n");
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83 return ERR_TOO_MUCH_INPUT;
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84 }
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85
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86 if (buf[len-2] != '\r') {
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87 if (buf[len-1] != '\n') {
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88 printf("Line too long.\n");
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89 return ERR_INVALID_INPUT;
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90 }
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91 buf[len-1] = '\r';
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92 buf[len] = '\n';
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93 buf[len+1] = '\0';
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94 len++;
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95 }
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96
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97 if (strcmp("-----BEGIN CERTIFICATE LIST-----\r\n", buf) == 0){
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98 readingList = 1;
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99 continue;
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100 }
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101 if (strcmp("-----END CERTIFICATE LIST-----\r\n", buf) == 0){
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102 readingList = 0;
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103 continue;
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104 }
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105 if (readingList) {
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106 str_append_str(certificate_list, &list_size, buf, len);
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107 } else if (strcmp("UNINSTALL", buf) == 0) {
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108 /* Remove trailing \r\n */
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109 strv_append(to_remove, buf, len - 2);
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110 continue;
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111 }
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112 if (*buf == 'I') {
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113 /* Remove leading I: and trailing \r\n */
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114 strv_append(readingList ? all_certs : to_install,
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115 buf+2, len - 4);
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116 continue;
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117 }
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118 if (*buf == 'R') {
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119 /* Remove leading R: and trailing \r\n */
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120 strv_append(readingList ? all_certs : to_remove,
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121 buf+2, len - 4);
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122 continue;
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123 }
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124 }
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125
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126 return 0;
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127 }
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128
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129 /** @brief Check that the insturctions match to the list
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130 *
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131 * Only certificates part of the certificate_list are allowed
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132 * for installation.
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133 *
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134 * @param[in] all_certs strv of all valid certificates in a list
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135 * @param[in] to_validate strv of instructions
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136 *
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137 * @returns 0 on success, an error otherwise
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138 */
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139 int validate_instructions(char **all_certs,
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140 char **to_validate)
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
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141 {
148
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142 int i = 0,
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143 j = 0;
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144
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145 if (!all_certs || strv_length(all_certs) < 1) {
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146 /* Invalid parameters */
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147 return -1;
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148 }
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149
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150 if (to_validate == NULL) {
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151 /* Nothing is valid */
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152 return 0;
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153 }
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154
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155 for (i=0; to_validate[i]; i++) {
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156 bool found = false;
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157 for (j=0; all_certs[j]; j++) {
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158 if (strncmp(to_validate[i], all_certs[j], MAX_LINE_LENGTH - 2) == 0) {
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159 found = true;
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160 break;
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161 }
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162 }
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163 if (!found) {
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164 printf("Install instruction with invalid certificate\n.");
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165 return ERR_INVALID_INSTRUCTIONS;
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166 }
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167 }
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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168
64
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169 return 0;
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170 }
148
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171
68
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172
26
cbd57d767dfa Move layout around. Restructure CMakeLists
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173 int main() {
59
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174 char **to_install = NULL;
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175 char **to_remove = NULL;
148
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176 char **all_certs = NULL;
64
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177 char *certificate_list = NULL;
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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178 size_t list_len = 0;
59
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179 int ret = -1;
148
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180 bool uninstall = false;
60
6acb1dae6185 Use strn functions and improve error handling.
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181
148
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182 ret = readInput(&certificate_list, &to_install, &to_remove, &all_certs);
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183
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184 if (ret) {
60
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185 return ret;
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186 }
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187
64
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188 if (!certificate_list) {
60
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189 return ERR_INVALID_INPUT_NO_LIST;
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190 }
59
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191
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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192 list_len = strnlen(certificate_list, MAX_INPUT_SIZE);
59
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193
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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194 ret = verify_list(certificate_list, list_len);
64
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195
148
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196 if (ret) {
64
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197 return ERR_INVALID_SIGNATURE;
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198 }
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199
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diff changeset
200 if (!strv_length(to_install) && !strv_length(to_remove)) {
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diff changeset
201 return ERR_NO_INSTRUCTIONS;
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diff changeset
202 }
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diff changeset
203
68
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204
148
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
205 /* Check that the instructions are ok to execute */
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206 if (to_install) {
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207 ret = validate_instructions(all_certs, to_install);
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diff changeset
208 if (ret) {
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209 return ret;
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210 }
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
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diff changeset
211 }
68
8ffbb48528ae Add certificate installation for windows
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212
8ffbb48528ae Add certificate installation for windows
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diff changeset
213 if (to_remove) {
148
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diff changeset
214 if (to_remove[0] && strncmp("UNINSTALL", to_remove[0], MAX_LINE_LENGTH) == 0) {
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parents: 137
diff changeset
215 uninstall = true;
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diff changeset
216 strv_free(to_remove);
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diff changeset
217 to_remove = NULL;
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diff changeset
218 } else {
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
219 ret = validate_instructions(all_certs, to_remove);
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diff changeset
220 if (ret) {
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diff changeset
221 return ret;
68
8ffbb48528ae Add certificate installation for windows
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diff changeset
222 }
8ffbb48528ae Add certificate installation for windows
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diff changeset
223 }
8ffbb48528ae Add certificate installation for windows
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diff changeset
224 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
225
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
226 if (uninstall) {
148
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
227 /* To uninstall does not have to be verified as it part of the
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diff changeset
228 * signed list.*/
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Andre Heinecke <aheinecke@intevation.de>
parents: 137
diff changeset
229 to_remove = all_certs;
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parents: 137
diff changeset
230 } else {
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
231 strv_free(all_certs);
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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parents: 137
diff changeset
232 all_certs = NULL;
68
8ffbb48528ae Add certificate installation for windows
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diff changeset
233 }
8ffbb48528ae Add certificate installation for windows
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diff changeset
234
8ffbb48528ae Add certificate installation for windows
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diff changeset
235 #ifdef WIN32
149
bd5a5d3e5674 We decided to use bool. So let's use it.
Andre Heinecke <aheinecke@intevation.de>
parents: 148
diff changeset
236 return install_certificates_win((const char**) to_install, true);
68
8ffbb48528ae Add certificate installation for windows
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parents: 65
diff changeset
237 //remove_certificates_win((const char**) to_remove, 1);
8ffbb48528ae Add certificate installation for windows
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diff changeset
238 #endif
8ffbb48528ae Add certificate installation for windows
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parents: 65
diff changeset
239
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
240 /* Make valgrind happy */
116
c602d8cfa619 Refactoring: unified naming of string vector functions.
Sascha Wilde <wilde@intevation.de>
parents: 91
diff changeset
241 strv_free(to_install);
c602d8cfa619 Refactoring: unified naming of string vector functions.
Sascha Wilde <wilde@intevation.de>
parents: 91
diff changeset
242 strv_free(to_remove);
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
243 free(certificate_list);
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
244
25
92108a2120f1 Move certificatelist to common. Add cinst directory
Andre Heinecke <aheinecke@intevation.de>
parents:
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245 return 0;
92108a2120f1 Move certificatelist to common. Add cinst directory
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
246 }
http://wald.intevation.org/projects/trustbridge/