39 ifstream
file(file_name, ios::in);
40 if (!
file.is_open()) {
51 return (::stat(path.c_str(), &statbuf) == 0);
57 if (::stat(path.c_str(), &statbuf) < 0) {
61 return (statbuf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO));
72 if (::stat(path.c_str(), &statbuf) < 0) {
75 return ((statbuf.st_mode & S_IFMT) == S_IFDIR);
81 if (::stat(path.c_str(), &statbuf) < 0) {
84 return ((statbuf.st_mode & S_IFMT) == S_IFREG);
90 if (::stat(path.c_str(), &statbuf) < 0) {
93 return ((statbuf.st_mode & S_IFMT) == S_IFSOCK);
99 mode_t mask(S_IWGRP | S_IRWXO);
100 mode_t orig = umask(mask);
102 if ((orig | mask) != mask) {
103 static_cast<void>(umask(orig | mask));
108 dir_present_ =
false;
109 if (!full_name.empty()) {
111 size_t last_slash = full_name.find_last_of(
'/');
112 if (last_slash != string::npos) {
118 parent_path_ = full_name.substr(0, last_slash);
119 if (last_slash == full_name.size()) {
127 size_t last_dot = full_name.find_last_of(
'.');
128 if ((last_dot == string::npos) || (dir_present_ && (last_dot < last_slash))) {
133 stem_ = full_name.substr(last_slash + 1);
139 extension_ = full_name.substr(last_dot);
142 if ((last_dot - last_slash) > 1) {
143 stem_ = full_name.substr(last_slash + 1, last_dot - last_slash - 1);
150 return (parent_path_ + (dir_present_ ?
"/" :
"") + stem_ + extension_);
155 return (parent_path_);
160 return (parent_path_ + (dir_present_ ?
"/" :
""));
175 return (stem_ + extension_);
180 string const trimmed_replacement(
trim(replacement));
181 if (trimmed_replacement.empty()) {
182 extension_ = string();
184 size_t const last_dot(trimmed_replacement.find_last_of(
'.'));
185 if (last_dot == string::npos) {
186 extension_ =
"." + trimmed_replacement;
188 extension_ = trimmed_replacement.substr(last_dot);
196 string const trimmed_replacement(
trim(replacement));
197 dir_present_ = (trimmed_replacement.find_last_of(
'/') != string::npos);
198 if (trimmed_replacement.empty() || (trimmed_replacement ==
"/")) {
199 parent_path_ = string();
200 }
else if (trimmed_replacement.at(trimmed_replacement.size() - 1) ==
'/') {
201 parent_path_ = trimmed_replacement.substr(0, trimmed_replacement.size() - 1);
203 parent_path_ = trimmed_replacement;
209 char dir[](
"/tmp/kea-tmpdir-XXXXXX");
210 char const* dir_name = mkdtemp(dir);
214 dir_name_ = string(dir_name);
218 DIR *dir(opendir(dir_name_.c_str()));
223 std::unique_ptr<DIR, void(*)(DIR*)> defer(dir, [](DIR* d) { closedir(d); });
227 while ((i = readdir(dir))) {
228 if (strcmp(i->d_name,
".") == 0 || strcmp(i->d_name,
"..") == 0) {
232 filepath = dir_name_ +
'/' + i->d_name;
233 remove(filepath.c_str());
236 rmdir(dir_name_.c_str());
244 const std::string env_name )
245 : default_path_(default_path), env_name_(env_name),
246 default_overridden_(false) {
252 const std::string explicit_path ) {
254 if (!explicit_path.empty()) {
255 path_ = explicit_path;
256 }
else if (!env_name_.empty()) {
257 path_ = std::string(std::getenv(env_name_.c_str()) ?
258 std::getenv(env_name_.c_str()) : default_path_);
260 path_ = default_path_;
265 while (!path_.empty() && path_.back() ==
'/') {
269 default_overridden_ = (path_ != default_path_);
277 bool enforce_path )
const {
278 Path input_path(
trim(input_path_str));
279 auto filename = input_path.
filename();
280 if (filename.empty()) {
286 if (!parent_dir.empty()) {
289 return (input_path_str);
293 if ((parent_path != path_) || (parent_dir ==
"/")) {
295 << (parent_path.empty() ?
"/" : parent_path)
296 <<
"', supported path is '"
301 std::string valid_path(path_ +
"/" + filename);
307 bool enforce_path )
const {
308 std::string input_copy =
trim(input_path_str);
314 if (!input_path_str.empty()) {
315 std::string input_copy = input_path_str;
316 while (!input_copy.empty() && input_copy.back() ==
'/') {
317 input_copy.pop_back();
320 if (input_copy != path_) {
322 << input_path_str <<
"', supported path is '"
338 return (default_overridden_);
342 return (enforce_security_);
346 enforce_security_ = enable;
349bool PathChecker::enforce_security_ =
true;
A generic exception that is thrown if a parameter given to a method is considered invalid in that con...
A generic exception that is thrown when an unexpected error condition occurs.
std::string getPath(bool reset=false, const std::string explicit_path="")
Fetches the supported path.
static bool shouldEnforceSecurity()
Indicates security checks should be enforced.
PathChecker(const std::string default_path, const std::string env_name="")
Constructor.
bool isDefaultOverridden()
Indicates if the default path has been overridden.
static void enableEnforcement(bool enable)
Enables or disables security enforcment checks.
std::string validateDirectory(const std::string input_path_str, bool enforce_path=shouldEnforceSecurity()) const
Validates a directory against a supported path.
bool pathHasPermissions(mode_t permissions, bool enforce_perms=shouldEnforceSecurity()) const
Check if the path has expected permissions.
std::string validatePath(const std::string input_path_str, bool enforce_path=shouldEnforceSecurity()) const
Validates a file path against a supported path.
#define isc_throw(type, stream)
A shortcut macro to insert known values into exception arguments.
bool isSocket(string const &path)
Check if there is a socket at the given path.
string getContent(string const &file_name)
Get the content of a regular file.
bool isFile(string const &path)
Check if there is a file at the given path.
bool exists(string const &path)
Check if there is a file or directory at the given path.
bool isDir(string const &path)
Check if there is a directory at the given path.
mode_t getPermissions(const std::string path)
Fetches the file permissions mask.
bool hasPermissions(const std::string path, const mode_t &permissions)
Check if there if file or directory has the given permissions.
void setUmask()
Set umask (at least 0027 i.e. no group write and no other access).
string trim(const string &input)
Trim leading and trailing spaces.
Defines the logger used by the top-level component of kea-lfc.
Path(std::string const &path)
Constructor.
Path & replaceParentPath(std::string const &replacement=std::string())
Trims {replacement} and replaces this instance's parent path with it.
std::string parentDirectory() const
Get the parent directory.
std::string extension() const
Get the extension of the file.
Path & replaceExtension(std::string const &replacement=std::string())
Identifies the extension in {replacement}, trims it, and replaces this instance's extension with it.
std::string stem() const
Get the base name of the file without the extension.
std::string parentPath() const
Get the parent path.
std::string filename() const
Get the name of the file, extension included.
std::string str() const
Get the path in textual format.