uint_t ftpServerGetFilePermCallback(FtpClientConnection *connection,
const char_t *user, const char_t *path)
{
uint_t perm;
//Debug message
TRACE_INFO("FTP server: Checking access rights for %s\r\n", path);
//Manage access rights
if(!strcmp(user, "anonymous"))
{
//Allow read/write access to temp directory
if(pathMatch(path, "/temp/*"))
perm = FTP_FILE_PERM_LIST | FTP_FILE_PERM_READ | FTP_FILE_PERM_WRITE;
//Allow read access only to other directories
else
perm = FTP_FILE_PERM_LIST | FTP_FILE_PERM_READ;
}
else if(!strcmp(user, "admin"))
{
//Allow read/write access
perm = FTP_FILE_PERM_LIST | FTP_FILE_PERM_READ | FTP_FILE_PERM_WRITE;
}
else
{
//Deny access
perm = 0;
}
//Return the relevant permissions
return perm;
}
HttpAccessStatus httpServerAuthCallback(HttpConnection *connection,
const char_t *user, const char_t *uri)
{
HttpAccessStatus status;
//Manage access rights
if(pathMatch(uri, "/passwords.txt"))
{
//This file is not visible
status = HTTP_ACCESS_DENIED;
}
else if(pathMatch(uri, "/config/*"))
{
//This directory is not visible
status = HTTP_ACCESS_DENIED;
}
else if(pathMatch(uri, "/admin/*"))
{
//Only the administrator can access this directory
if(!strcmp(user, "administrator"))
{
//Check the administrator password
if(httpCheckPassword(connection, "password", HTTP_AUTH_MODE_BASIC))
status = HTTP_ACCESS_ALLOWED;
else
status = HTTP_ACCESS_BASIC_AUTH_REQUIRED;
}
else
{
//Users other than administrator cannot access this directory
status = HTTP_ACCESS_BASIC_AUTH_REQUIRED;
}
}
else
{
//No restriction for other directories
status = HTTP_ACCESS_ALLOWED;
}
//Return access status
return status;
}
bool_t pathMatch(const char_t *path, const char_t* pattern)
{
size_t i = 0;
size_t j = 0;
//Parse the pattern string
while(pattern[j] != '\0')
{
//Any wildcard character found?
if(pattern[j] == '?')
{
//The question mark matches a single character
if(path[i] == '\0')
{
return FALSE;
}
else
{
//Advance position in pathname
i++;
//Advance position in pattern string
j++;
}
}
else if(pattern[j] == '*')
{
//The asterisk sign matches zero or more characters
if(path[i] == '\0')
{
//Advance position in pattern string
j++;
}
else if(pathMatch(path + i, pattern + j + 1))
{
return TRUE;
}
else
{
//Advance position in pathname
i++;
}
}
else
{
//Case insensitive comparison
if(tolower((uint8_t) path[i]) != tolower((uint8_t) pattern[j]))
{
return FALSE;
}
else
{
//Advance position in pathname
i++;
//Advance position in pattern string
j++;
}
}
}
//Check whether the file name matches the specified pattern
if(path[i] == '\0' && pattern[j] == '\0')
return TRUE;
else
return FALSE;
}
