trustbridge: cinst/main.c annotate

annotate cinst/main.c @ 60:6acb1dae6185

Use strn functions and improve error handling. Even if we know the strings are NULL terminated we use length terminated string functions after a first strlen this makes it easier to assert that at one point we know the string is terminated and afterwards use the length of that.

author	Andre Heinecke <aheinecke@intevation.de>
date	Tue, 18 Mar 2014 11:28:02 +0000
parents	3f6378647371
children	fb9f78f7ab2f

rev	line source
25 92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	1 /** @brief Main entry point for the cinst process.
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	2 *
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	3 * The cinst process may or may not be run with elevated
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	4 * privileges. When run with elevated privileges this
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	5 * process will modify system wide certificate stores.
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	6 * Otherwise only the users certificate stores are modified.
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	7 *
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	8 * It expects a certificatelist on stdin enclosed in a
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	9 * -----BEGIN CERTIFICATE LIST-----
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	10 * ...
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	11 * -----END CERTIFICATE LIST-----
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	12 *
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	13 * Followed by additional instruction lines of:
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	14 * I:<certificate>
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	15 * R:<certificate>
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	16 *
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	17 * It will only execute the instructions if the
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	18 * I and R instructions are also part of the signed
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	19 * certificate list. The signature is validated with the
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	20 * built in key.
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	21 *
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	22 * The special instruction "UNINSTALL" will cause the installer
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	23 * to remove all certificates (Even those marked with I) that
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	24 * are part of the list to be removed.
25 92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	25 *
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	26 **/
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	27 #define MAX_LINE_LENGTH 1000
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	28 #define MAX_LINES 1000
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	29 #define MAX_INPUT_SIZE 2000000 /* MAX_LINE_LENGTH * (MAX_LINES 2) /
25 92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	30
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	31 #include <stdio.h>
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	32 #include <string.h>
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	33 #include <assert.h>
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	34
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	35 #include "strhelp.h"
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	36 #include "listutil.h"
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	37 #include "errorcodes.h"
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	38
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	39 /* @brief Read stdin into data structures.
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	40 *
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	41 * Reads from stdin and sorts the input into the respective
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	42 * variables. The pointers returned need to be freed by the caller.
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	43 * Terminates in OOM conditions.
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	44 *
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	45 * The caller needs to free the memory allocated by this function
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	46 * even when an error is returned.
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	47 *
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	48 * @returns: 0 on success. An error code otherwise.
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	49 */
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	50 int readInput(char certificateList, char *to_install,
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	51 char ***to_remove)
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	52 {
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	53 int lines_read = 0;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	54 int readingList = 0;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	55 char buf[MAX_LINE_LENGTH + 1];
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	56
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	57 while (fgets(buf, MAX_LINE_LENGTH + 1, stdin)) {
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	58 size_t len = strlen(buf); /* fgets ensures buf is terminated */
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	59 if (lines_read ++ > MAX_LINES) {
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	60 printf("Too many lines\n");
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	61 return ERR_TOO_MUCH_INPUT;
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	62 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	63 if (strcmp("-----BEGIN CERTIFICATE LIST-----", buf) == 0){
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	64 readingList = 1;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	65 continue;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	66 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	67 if (strcmp("-----END CERTIFICATE LIST-----", buf) == 0){
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	68 readingList = 0;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	69 continue;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	70 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	71 if (readingList) {
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	72 str_append_str(certificateList, buf, len);
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	73 continue;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	74 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	75 if (*buf == 'I') {
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	76 array_append_str(to_install, buf+2, len - 2);
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	77 continue;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	78 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	79 if (*buf == 'R') {
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	80 array_append_str(to_remove, buf+2, len - 2);
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	81 continue;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	82 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	83 if (strcmp("UNINSTALL", buf) == 0) {
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	84 array_append_str(to_remove, buf, len - 2);
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	85 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	86 }
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	87
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	88 return 0;
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	89 }
25 92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	90
26 cbd57d767dfa Move layout around. Restructure CMakeLists Andre Heinecke <andre.heinecke@intevation.de> parents: 25 diff changeset	91 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	92
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	93 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	94 char **to_remove = NULL;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	95 char *certificateList = NULL;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	96 int ret = -1;
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	97
60 6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	98 ret = readInput(&certificateList, &to_install, &to_remove);
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	99
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	100 if (ret != 0) {
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	101 return ret;
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	102 }
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	103
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	104 if (!certificateList) {
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	105 return ERR_INVALID_INPUT_NO_LIST;
6acb1dae6185 Use strn functions and improve error handling. Andre Heinecke <aheinecke@intevation.de> parents: 59 diff changeset	106 }
59 3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	107
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	108 ret = verify_list(certificateList, strlen(certificateList));
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	109
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	110 printf ("Verify List returned %i\n", ret);
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String Andre Heinecke <aheinecke@intevation.de> parents: 26 diff changeset	111
25 92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	112 return 0;
92108a2120f1 Move certificatelist to common. Add cinst directory Andre Heinecke <aheinecke@intevation.de> parents: diff changeset	113 }

Mercurial > trustbridge

annotate cinst/main.c @ 60:6acb1dae6185