[Developer] #424 implement VPD ORDS backoffice

Refs #424

src/main/java/com/cloudhandson/vpdbackoffice/service/TokenHasher.java

@@ -0,0 +1,19 @@
+package com.cloudhandson.vpdbackoffice.service;
+
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.util.HexFormat;
+import org.springframework.stereotype.Component;
+
+@Component
+public class TokenHasher {
+
+  public String sha256(String token) {
+    try {
+      MessageDigest digest = MessageDigest.getInstance("SHA-256");
+      return HexFormat.of().formatHex(digest.digest(token.getBytes(StandardCharsets.UTF_8))).toUpperCase();
+    } catch (Exception e) {
+      throw new AppException("Failed to hash bearer token");
+    }
+  }
+}