Mercurial > trustbridge

annotate cinst/main.c @ 89:00f9b91f4039

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Do not leak a byte if the file is empty
author Andre Heinecke <aheinecke@intevation.de>
date Thu, 20 Mar 2014 18:40:15 +0000
parents 8ffbb48528ae
children 899fcddb92d0
rev   line source
25
92108a2120f1 Move certificatelist to common. Add cinst directory
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1 /** @brief Main entry point for the cinst process.
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2 *
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3 * The cinst process may or may not be run with elevated
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4 * privileges. When run with elevated privileges this
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5 * process will modify system wide certificate stores.
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6 * Otherwise only the users certificate stores are modified.
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7 *
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8 * It expects a certificatelist on stdin enclosed in a
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9 * -----BEGIN CERTIFICATE LIST-----
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10 * ...
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11 * -----END CERTIFICATE LIST-----
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12 *
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13 * Followed by additional instruction lines of:
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14 * I:<certificate>
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15 * R:<certificate>
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16 *
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17 * It will only execute the instructions if the
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18 * I and R instructions are also part of the signed
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19 * certificate list. The signature is validated with the
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20 * built in key.
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21 *
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22 * The special instruction "UNINSTALL" will cause the installer
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23 * to remove all certificates (Even those marked with I) that
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24 * are part of the list to be removed.
25
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25 *
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26 **/
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27 #include <stdio.h>
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28 #include <stdlib.h>
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29 #include <string.h>
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30 #include <assert.h>
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31
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32 #include <polarssl/base64.h>
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33
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34 #include "strhelp.h"
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35 #include "listutil.h"
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36 #include "errorcodes.h"
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37
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38 #ifdef WIN32
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39 #include <windows.h>
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40 #include <wincrypt.h>
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41 #endif
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42
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43 /* The certificate list + instructions may only be so long as
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44 * twice the accepted certificatelist size */
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45 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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46
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47 /* @brief Read stdin into data structures.
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48 *
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49 * Reads from stdin and sorts the input into the respective
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50 * variables. The pointers returned need to be freed by the caller.
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51 * Terminates in OOM conditions.
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52 *
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53 * The caller needs to free the memory allocated by this function
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54 * even when an error is returned.
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55 *
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56 * @returns: 0 on success. An error code otherwise.
59
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57 */
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58 int readInput(char **certificate_list, char ***to_install,
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59 char ***to_remove)
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60 {
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61 int lines_read = 0;
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62 int readingList = 0;
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63 char buf[MAX_LINE_LENGTH + 1];
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64
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65 while (fgets(buf, MAX_LINE_LENGTH + 1, stdin)) {
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66 size_t len = strlen(buf); /* fgets ensures buf is terminated */
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67 if (lines_read ++ > MAX_LINES) {
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68 printf("Too many lines\n");
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69 return ERR_TOO_MUCH_INPUT;
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70 }
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71 if (strcmp("-----BEGIN CERTIFICATE LIST-----\r\n", buf) == 0){
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72 readingList = 1;
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73 continue;
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74 }
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75 if (strcmp("-----END CERTIFICATE LIST-----\r\n", buf) == 0){
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76 readingList = 0;
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77 continue;
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78 }
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79 if (readingList) {
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80 str_append_str(certificate_list, buf, len);
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81 continue;
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82 }
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83 if (*buf == 'I') {
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84 /* Remove leading I: and trailing \r\n */
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85 array_append_str(to_install, buf+2, len - 4);
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86 continue;
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87 }
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88 if (*buf == 'R') {
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89 /* Remove leading R: and trailing \r\n */
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90 array_append_str(to_remove, buf+2, len - 4);
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91 continue;
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92 }
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93 if (strcmp("UNINSTALL", buf) == 0) {
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94 /* Remove trailing \r\n */
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95 array_append_str(to_remove, buf, len - 2);
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96 }
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97 }
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98
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99 return 0;
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100 }
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101 /*
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102 int validate_instructions(const char *certificate_list,
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103 const size_t list_len,
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104 const char **to_install,
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105 const char **to_remove)
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106 {
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107 TODO
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108 (void *) certificate_list;
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109 (void **) to_install;
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110 (void **) to_remove;
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111 (void) list_len;
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112
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113 return 0;
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114 }
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115 */
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116
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117 #ifdef WIN32
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118 /** @brief Install certificates into Windows store
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119 *
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120 * @param [in] to_install NULL terminated array of base64 encoded certificates.
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121 * @param [in] user_store set to True if the certificates shoudl be installed
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122 * only for the current user. O for system wide installation.
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123 * @returns 0 on success an errorcode otherwise.
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124 */
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125 int install_certificates_win(const char **to_install, int user_store)
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126 {
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127 int i = 0;
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128 HCERTSTORE hStore = NULL;
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129
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130 if (!user_store) {
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131 // Access user store
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132 hStore = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0,
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133 0, CERT_SYSTEM_STORE_CURRENT_USER, L"Root");
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134 } else {
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135 // Access machine store
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136 hStore = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0,
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
137 0, CERT_SYSTEM_STORE_LOCAL_MACHINE, L"Root");
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
138 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
139
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
140 if (!hStore) {
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
141 return ERR_STORE_ACCESS_DENIED;
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
142 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
143
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
144 while (to_install[i]) {
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parents: 65
diff changeset
145 size_t needed_len = 0;
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parents: 65
diff changeset
146 size_t cert_len = strnlen(to_install[i], MAX_LINE_LENGTH);
8ffbb48528ae Add certificate installation for windows
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parents: 65
diff changeset
147 int ret = -1;
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parents: 65
diff changeset
148 unsigned char *buf;
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
149 /* Check the needed size for the buffer */
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
150 ret = base64_decode(NULL, &needed_len,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
151 (unsigned char *)to_install[i], cert_len);
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
152
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
153 if (ret != 0 && ret != POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL) {
8ffbb48528ae Add certificate installation for windows
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parents: 65
diff changeset
154 return ERR_INVALID_INSTRUCTIONS;
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
155 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
156
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
157 buf = xmalloc(needed_len);
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
158 memset (buf, 0, needed_len);
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
159
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
160 ret = base64_decode(buf, &needed_len,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
161 (unsigned char *)to_install[i], cert_len);
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
162
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
163 if (ret != 0) {
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parents: 65
diff changeset
164 return ERR_INVALID_INSTRUCTIONS;
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
165 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
166
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
167 ret = CertAddEncodedCTLToStore (hStore,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
168 X509_ASN_ENCODING,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
169 (PBYTE)buf,
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diff changeset
170 needed_len,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
171 CERT_STORE_ADD_ALWAYS,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
172 NULL);
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
173
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parents: 65
diff changeset
174 if (ret != 0) {
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
175 printf("Failed to add certificate\n");
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parents: 65
diff changeset
176 free(buf);
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
177 return ret;
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
178 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
179 free(buf);
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
180 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
181 if(hStore) {
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
182 CertCloseStore(hStore, 0);
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
183 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
184 return 0;
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
185 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
186 #endif
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
187
26
cbd57d767dfa Move layout around. Restructure CMakeLists
Andre Heinecke <andre.heinecke@intevation.de>
parents: 25
diff changeset
188 int main() {
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
189 char **to_install = NULL;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
190 char **to_remove = NULL;
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
191 char *certificate_list = NULL;
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
Andre Heinecke <aheinecke@intevation.de>
parents: 64
diff changeset
192 size_t list_len = 0;
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
193 int ret = -1;
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
194 /*
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
195 i = 0 ,
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Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
196 uninstall = 0;
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
197 */
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
198 ret = readInput(&certificate_list, &to_install, &to_remove);
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
199
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
200 if (ret != 0) {
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
201 return ret;
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
202 }
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
203
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
204 if (!certificate_list) {
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
205 return ERR_INVALID_INPUT_NO_LIST;
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
206 }
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
207
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
Andre Heinecke <aheinecke@intevation.de>
parents: 64
diff changeset
208 list_len = strnlen(certificate_list, MAX_INPUT_SIZE);
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents: 26
diff changeset
209
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
Andre Heinecke <aheinecke@intevation.de>
parents: 64
diff changeset
210 ret = verify_list(certificate_list, list_len);
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
211
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
212 if (ret != 0) {
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
213 return ERR_INVALID_SIGNATURE;
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
214 }
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
215
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
216 if (!strv_length(to_install) && !strv_length(to_remove)) {
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
217 return ERR_NO_INSTRUCTIONS;
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
218 }
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
219
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
220
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
221 /* Check that the instructions are ok to execute
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
Andre Heinecke <aheinecke@intevation.de>
parents: 64
diff changeset
222 ret = validate_instructions(certificate_list, list_len, to_install,
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
Andre Heinecke <aheinecke@intevation.de>
parents: 64
diff changeset
223 to_remove);
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
224 if (ret != 0) {
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
225 return ERR_INVALID_INSTRUCTIONS;
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
226 }
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
227
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
228 if (to_remove) {
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
229 for (i=0; to_remove[i]; i++) {
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
230 if (strncmp("UNINSTALL", to_remove[i], MAX_LINE_LENGTH)) {
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
231 uninstall = 1;
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
232 break;
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
233 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
234 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
235 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
236
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
237 if (uninstall) {
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
238
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
239 }
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
240 */
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
241
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
242 #ifdef WIN32
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
243 install_certificates_win((const char**) to_install, 1);
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
244 //remove_certificates_win((const char**) to_remove, 1);
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
245 #endif
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
246
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
247 /* Make valgrind happy */
68
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
248 strfreev(to_install);
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
249 strfreev(to_remove);
8ffbb48528ae Add certificate installation for windows
Andre Heinecke <aheinecke@intevation.de>
parents: 65
diff changeset
250 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
251
25
92108a2120f1 Move certificatelist to common. Add cinst directory
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
252 return 0;
92108a2120f1 Move certificatelist to common. Add cinst directory
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
253 }
http://wald.intevation.org/projects/trustbridge/