Add file path validation

Add file path validation for EnvVarFileResolver.  Refactored
PathValidator to org.onap.ccsdk.sli.core.utils so it can be used here.

Change-Id: Ibb50df0ad020cf376c1ce20e7b598f7ad7223d48
Issue-ID: CCSDK-2918
Signed-off-by: Dan Timoney <dtimoney@att.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/PathValidator.java b/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/PathValidator.java
new file mode 100644
index 00000000..97352501
--- /dev/null
+++ b/utils/provider/src/main/java/org/onap/ccsdk/sli/core/utils/PathValidator.java
@@ -0,0 +1,17 @@
+package org.onap.ccsdk.sli.core.utils;
+import java.util.regex.Pattern;
+
+public class PathValidator {
+    public static boolean isValidXmlPath(String path) {
+        Pattern allowList = Pattern.compile("[-\\w/\\/]+\\.xml$");
+        return (allowList.matcher(path).matches());
+    }
+    public static boolean isValidPropertiesPath(String path) {
+        Pattern allowList = Pattern.compile("[-\\w/\\/]+\\.properties$");
+        return (allowList.matcher(path).matches());
+    }
+    public static boolean isValidFilePath(String path) {
+        Pattern allowList = Pattern.compile("[-\\w/\\/]+");
+        return (allowList.matcher(path).matches());
+    }
+}