/* This is take directly from Part 1
*
* Change the a specific file privalages
* Same as the user change but in this one you change all the privilages for an object
*
*/
void changeFilePriv(int** array, int num_users, int num_files, int num_perm, SYSUSER *tempUser, SYSFILE *tempFile, SYSPERM *tempPerm) {
char input_file[25] = "";
char temp_priv[10] = "";
int len,i,j,k;
// Promt for the User
printf("Which file would you like to change(file change only): ");
if (fgets(input_file, MAX_LEN, stdin) != NULL) {
clearInputStream(input_file);
len = strlen(input_file);
if(input_file[len - 1] == '\n') input_file[len - 1] = '\0';
}
//Promt for the Privilage to change
printf("Which privelages would you like to set(NO, R, W, RW): ");
if (fgets(temp_priv, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_priv);
len = strlen(temp_priv);
if(temp_priv[len - 1] == '\n') temp_priv[len - 1] = '\0';
}
//Go thought the matrix if the object is matched then change the privalges
for (i = 0; i < num_files; i++)
if(strcmp(input_file, tempFile[i].label) == 0)
for (j=0; j < num_users; j++)
for(k=0; k < num_perm; k++)
if(strcmp(temp_priv,tempPerm[k].label) == 0){
array[j][i] = tempPerm[k].permission;
}
}
/*
*
* Change the a specific labs permissions for all the students in it
* Ask for the user, object and the permission and apply all of those. Same as in the other two
*
*/
void changeStudentLabPerm(int** array, int num_users, int num_files, int num_perm, SYSUSER *tempUser, SYSFILE *tempFile, SYSPERM *tempPerm) {
char temp_priv[15] = "";
char input_group[25] = "";
int input_lab;
char term;
int len,i,j,k,x, temp_user_perm;
// Select Lab Number
printf("Which lab would you like to modify(integer): ");
if(scanf("%d%c", &input_lab, &term) != 2 || term != '\n')
printf("failure\n");
//Select Object
printf("Which group would you like to change: ");
//Clearing of Input Buffer
if (fgets(input_group, MAX_LEN, stdin) != NULL) {
clearInputStream(input_group);
len = strlen(input_group);
if(input_group[len - 1] == '\n') input_group[len - 1] = '\0';
}
//Select Privilege
printf("Which privelages would you like to set(NO, R, W, RW): ");
//Clearing of Input Buffer
if (fgets(temp_priv, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_priv);
len = strlen(temp_priv);
if(temp_priv[len - 1] == '\n') temp_priv[len - 1] = '\0';
}
//printf("Lab#:%d, group:%s, privelage:%s\n", input_lab, input_group, temp_priv);
//Go thought the matrix matching the Lab number, the file, and the privilage
// Then change the permissions and after that call the "checkChangesForInstructor" to make sure that any other lower hierarchical users are changed as well
for(i=0; i<num_users; i++){
for(x=0; x< arraySize(tempUser[i].group_num); x++){
if((strcmp(input_group, tempUser[i].group) == 0) && input_lab == tempUser[i].group_num[x])
for (j=0; j < num_files; j++)
for(k=0; k < num_perm; k++)
if(strcmp(temp_priv,tempPerm[k].label) == 0){
array[i][j] = tempPerm[k].permission;
temp_user_perm = tempPerm[k].permission;
checkChangesForInstructor(array, tempUser[i].group, num_users, tempUser, input_lab, num_files, tempFile[j].label, tempFile, num_perm, tempPerm, temp_user_perm);
}
}
}
}
/*
*
* Change the a specific user and object privalages
* Ask for the user, object and the permission and apply all of those. Same as in the other two
*
*/
void changeUserObjectPriv(int** array, int num_users, int num_files, int num_perm, SYSUSER *tempUser, SYSFILE *tempFile, SYSPERM *tempPerm) {
char temp_user[15] = "";
char temp_priv[15] = "";
char input_file[25] = "";
int len,i,j,k;
// Select User
printf("Which user permission would you like to change(user and file change): ");
//Clearing of Input Buffer
if (fgets(temp_user, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_user);
len = strlen(temp_user);
if(temp_user[len - 1] == '\n') temp_user[len - 1] = '\0';
}
//Select Object
printf("Which file would you like to change: ");
//Clearing of Input Buffer
if (fgets(input_file, MAX_LEN, stdin) != NULL) {
clearInputStream(input_file);
len = strlen(input_file);
if(input_file[len - 1] == '\n') input_file[len - 1] = '\0';
}
//Select Privilege
printf("Which privelages would you like to set(NO, R, W, RW): ");
//Clearing of Input Buffer
if (fgets(temp_priv, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_priv);
len = strlen(temp_priv);
if(temp_priv[len - 1] == '\n') temp_priv[len - 1] = '\0';
}
//printf("used:%s, file:%s, privelage:%s\n", temp_user, input_file, temp_priv);
//Go thought the matrix if the object and the user is matched then change the privilege
for (i = 0; i < num_files; i++){
if(strcmp(input_file, tempFile[i].label) == 0){
for (j=0; j < num_users; j++){
if(strcmp(temp_user, tempUser[j].name) == 0){
for(k=0; k < num_perm; k++){
if(strcmp(temp_priv,tempPerm[k].label) == 0){
array[j][i] = tempPerm[k].permission;
}
}
}
}
}
}
}
/*
* This is Take from the Last Lab
*
* Print the Capability Ticket for a specific user
* Prompt for input for the user and then show capabilities for each file
*/
void printCapabilityTicket(int** array, int num_users, int num_files, int num_perm, SYSUSER *tempUser, SYSFILE *tempFile, SYSPERM *tempPerm) {
int i, j, len, k;
char temp_user[25] = "";
// Select User
printf("Which user would you like to view: ");
//Clearing of Input Buffer
if (fgets(temp_user, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_user);
len = strlen(temp_user);
if(temp_user[len - 1] == '\n') temp_user[len - 1] = '\0';
}
for(i=0; i<num_users; i++){
if(strcmp(temp_user, tempUser[i].name) == 0){
printf("Capability Ticket for: %s\n\n", tempUser[i].name);
for (j=0; j < num_files; j++){
printf("%*s:", 25,tempFile[j].name);
for(k=0; k < num_perm; k++){
if(array[i][j] == '\0'){
printf(" ");
break;
}else if(array[i][j] == tempPerm[k].permission){
printf(" %s ", tempPerm[k].label);
}
}
printf("\n");
}
}
}
}
/* This function prints out an access control list for a particular file.
* Every user in the access matrix is listed with their corresponding
* access privileges to the file.
*/
void printAccessControlList(int** array, int num_users, int num_files, int num_perm, SYSUSER *tempUser, SYSFILE *tempFile, SYSPERM *tempPerm){
int i, j, k, len;
char temp_file[MAX_LEN] = "";
int sizeOfArray = num_users * num_files;
// Select User
printf("Which file would you like to view: ");
//Clearing of Input Buffer
if (fgets(temp_file, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_file);
len = strlen(temp_file);
if(temp_file[len - 1] == '\n') temp_file[len - 1] = '\0';
}
/* Look for the file label the user is searching for and when found
* print all users in the access matrix along with the corresponding
* list of privileges in the file's field.
*/
for(i=0; i<sizeOfArray; i++){
if(strcmp(temp_file, tempFile[i].label) == 0){
printf("Access Control List for: %s\n\n", tempFile[i].name);
for (j=0; j < num_users; j++){
printf("%*s:", 25,tempUser[j].name);
for(k=0; k < num_perm; k++){
if(array[j][i] == tempPerm[k].permission){
printf(" %s ", tempPerm[k].label);
}
}
printf("\n");
}
}
}
}
/*
* Change the user privilages
* Does all the change but does not work with the group array for the TAs
* This could be done in further iteration
*
*/
void changeUserRole(int num_users, SYSUSER *tempUser){
char temp_user[15] = "";
char new_group[15] = "";
char term;
int i, len, new_lab;
// Promt for the User
printf("Which user would you like to change: ");
if (fgets(temp_user, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_user);
len = strlen(temp_user);
if(temp_user[len - 1] == '\n') temp_user[len - 1] = '\0';
}
for(i=0;i<num_users; i++){
if(strcmp(temp_user, tempUser[i].name) == 0){
printf("User: %s is part of group:%s and lab number:%d\n", tempUser[i].name, tempUser[i].group, tempUser[i].group_num[0]);
// Promt for Lab change
printf("Which lab would you like to assign to this user(integer): ");
if(scanf("%d%c", &new_lab, &term) != 2 || term != '\n')
printf("failure\n");
// Promt for the group change
printf("Which group would you like to assign the user to: ");
if (fgets(new_group, MAX_LEN, stdin) != NULL) {
clearInputStream(new_group);
len = strlen(new_group);
if(new_group[len - 1] == '\n') new_group[len - 1] = '\0';
}
strcpy(tempUser[i].group, new_group);
tempUser[i].group_num[0] = new_lab;
}
}
}
bool transmitFromDriverRequestBuffer() {
// Handle redirection
if (redirectFunction != NULL) {
bool result = redirectFunction();
return result;
}
// We do exactly as if the data was written by a end-user
// requestBuffer must be filled before calling this method
Buffer* requestBuffer = getDriverRequestBuffer();
Buffer* responseBuffer = getDriverResponseBuffer();
InputStream* inputStream = getDriverResponseInputStream();
if (inputStream == NULL) {
writeError(DRIVER_INPUT_STREAM_NULL);
return false;
}
// The first char is the device header
unsigned dataDispacherLength = 0;
unsigned char deviceHeader = bufferGetCharAtIndex(requestBuffer, DEVICE_HEADER_INDEX);
if (deviceHeader == DISPATCHER_COMMAND_HEADER) {
dataDispacherLength = DISPATCHER_COMMAND_AND_INDEX_HEADER_LENGTH;
// Reload the real Device Header
deviceHeader = bufferGetCharAtIndex(requestBuffer, dataDispacherLength + DEVICE_HEADER_INDEX);
}
// The second char is the command header
unsigned char commandHeader = bufferGetCharAtIndex(requestBuffer, dataDispacherLength + COMMAND_HEADER_INDEX);
bool result = handleStreamInstruction(
requestBuffer,
responseBuffer,
// Don't copy to an outputStream, because, we
// want to read the content of responseBuffer
NULL,
// TODO : Check why we don't provide any NotificationOutputStream
NULL,
// No Input Filter
NULL,
// No Output Filter
NULL);
// We need ack
result = checkIsAck(inputStream);
if (!result) {
// The buffer is corrupted, but we would like to avoid further problem
clearInputStream(inputStream);
return false;
}
// Device header answer with the same header as the request
checkIsChar(inputStream, deviceHeader);
if (!result) {
// The buffer is corrupted, but we would like to avoid further problem
clearInputStream(inputStream);
return false;
}
// Command header answer with the same header as the request
checkIsChar(inputStream, commandHeader);
if (!result) {
// The buffer is corrupted, but we would like to avoid further problem
clearInputStream(inputStream);
return false;
}
return result;
}
/*
* Works for the hierchies of the system
* Change the a specific labs permissions for all the students in it
* Ask for the user, object and the permission and apply all of those. Same as in the other two
*
*/
void changeStudentLabFilePerm(int** array, int num_users, int num_files, int num_perm, SYSUSER *tempUser, SYSFILE *tempFile, SYSPERM *tempPerm) {
char temp_priv[15] = "";
char input_group[25] = "";
char input_file[25] = "";
char temp_user_group[25] = "";
char temp_file_name[25];
int input_lab = 0;
char term;
int len,i,j,k,x, temp_group_num=0;
int temp_user_perm = 0;
// Select Lab
printf("Which lab would you like to modify(integer)(0 for instructors): ");
if(scanf("%d%c", &input_lab, &term) != 2 || term != '\n')
printf("failure\n");
//Select Group
printf("Which user role would you like to change: ");
//Clearing of Input Buffer
if (fgets(input_group, MAX_LEN, stdin) != NULL) {
clearInputStream(input_group);
len = strlen(input_group);
if(input_group[len - 1] == '\n') input_group[len - 1] = '\0';
}
//Select File
printf("Which file would you like to change: ");
//Clearing of Input Buffer
if (fgets(input_file, MAX_LEN, stdin) != NULL) {
clearInputStream(input_file);
len = strlen(input_file);
if(input_file[len - 1] == '\n') input_file[len - 1] = '\0';
}
//Select Privilege
printf("Which privelages would you like to set(NO, R, W, RW): ");
//Clearing of Input Buffer
if (fgets(temp_priv, MAX_LEN, stdin) != NULL) {
clearInputStream(temp_priv);
len = strlen(temp_priv);
if(temp_priv[len - 1] == '\n') temp_priv[len - 1] = '\0';
}
printf("Lab#:%d, group:%s, privelage:%s\n", input_lab, input_group, temp_priv);
//Go thought the matrix matching the Lab number, the file, privilage and name of the group
// Then change the permissions and after that call the "checkChangesForInstructor" to make sure that any other lower hierarchical users are changed as well
// in this one the checkChangesForInstructor is called after the loop, using the set temporary_files
for (i = 0; i < num_users; i++){
for(x=0; x<= arraySize(tempUser[i].group_num)+1; x++){
if((strcmp(input_group, tempUser[i].group) == 0) && input_lab == tempUser[i].group_num[x]){
for (j=0; j < num_files; j++){
if (strcmp(input_file, tempFile[j].label) == 0){
for(k=0; k < num_perm; k++){
if(strcmp(temp_priv,tempPerm[k].label) == 0){
array[i][j] = tempPerm[k].permission;
strcpy(temp_user_group, tempUser[i].group);
strcpy(temp_file_name, tempFile[j].label);
temp_user_perm = tempPerm[k].permission;
temp_group_num = tempUser[i].group_num[x];
}
}
}
}
}
}
}
checkChangesForInstructor(array, temp_user_group, num_users, tempUser, temp_group_num, num_files, temp_file_name, tempFile, num_perm, tempPerm, temp_user_perm);
}
