File not Found, Invalid path, Invalid Delimiter PTS errors case checks implemented

src/libpts/pts/pts.c

@@ -269,6 +269,37 @@ static char* get_filename(char *pathname)
 	return filename;
 }
 
+METHOD(pts_t, is_path_valid, bool, private_pts_t *this, char *path,
+						pts_error_code_t *error_code)
+{
+	int error;
+	struct stat sb;
+	
+	error_code = NULL;
+	error = stat(path, &sb);
+	if (error == 0)
+	{
+		return TRUE;
+	}
+	else if (error == ENOENT || error == ENOTDIR)
+	{
+		DBG1(DBG_IMC, "file/directory does not exist %s", path);
+		*error_code = TCG_PTS_FILE_NOT_FOUND;
+	}
+	else if (error == EFAULT)
+	{
+		DBG1(DBG_IMC, "bad address %s", path);
+		*error_code = TCG_PTS_INVALID_PATH;
+	}
+	else
+	{
+		DBG1(DBG_IMC, "error: %s occured while validating path: %s", strerror(error), path);
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
 METHOD(pts_t, do_measurements, pts_file_meas_t*,
 	   private_pts_t *this, u_int16_t request_id, char *pathname, bool is_directory)
 {
@@ -482,6 +513,7 @@ pts_t *pts_create(bool is_imc)
 			 .set_tpm_version_info = _set_tpm_version_info,
 			 .get_aik = _get_aik,
 			 .set_aik = _set_aik,
+			 .is_path_valid = _is_path_valid,
 			 .do_measurements = _do_measurements,
 			 .destroy = _destroy,
 		 },

src/libpts/pts/pts.h

@@ -23,12 +23,19 @@
 
 typedef struct pts_t pts_t;
 
+#include "pts_error.h"
 #include "pts_proto_caps.h"
 #include "pts_meas_algo.h"
 #include "pts_file_meas.h"
 
 #include <library.h>
 
+/**
+ * UTF-8 encoding of the character used to delimiter the filename
+ */
+#define SOLIDUS_UTF				0x002F
+#define REVERSE_SOLIDUS_UTF		0x005C
+
 /**
  * Class implementing the TCG Platform Trust System (PTS)
  *
@@ -106,6 +113,17 @@ struct pts_t {
 	 */
 	void (*set_aik)(pts_t *this, certificate_t *aik);
 
+	/**
+	 * Check whether path is valid file/directory on filesystem
+	 *
+	 * @param path			Absolute path
+	 * @param error_code	Output variable for PTS error code
+	 * @return				TRUE if path is valid or file/directory doesn't exist
+	 * 							or path is invalid
+	 * 						FALSE if local error occured within stat function
+	 */
+	bool (*is_path_valid)(pts_t *this, char *path, pts_error_code_t *error_code);
+
 	/**
 	 * Do PTS File Measurements
 	 *

src/libpts/pts/pts_error.c

@@ -56,4 +56,4 @@ pa_tnc_attr_t* pts_hash_alg_error_create(pts_meas_algorithms_t algorithms)
 	writer->destroy(writer);
 
 	return attr;
-}
+}