1. import java.util.HashMap;
  2. import java.util.Map;
  4. public class SessionCookieValidator {
  6. /**
  7. * Validates the integrity of session cookies for maintenance tasks.
  8. * Implements defensive checks to prevent potential vulnerabilities.
  9. *
  10. * @param cookies A map containing session cookies (name -> value).
  11. * @param expectedCookies A map containing the expected session cookies (name -> value).
  12. * @return True if the cookies are valid, false otherwise.
  13. * @throws IllegalArgumentException if input maps are null.
  14. */
  15. public static boolean validateSessionCookies(Map<String, String> cookies, Map<String, String> expectedCookies) {
  16. if (cookies == null || expectedCookies == null) {
  17. throw new IllegalArgumentException("Input maps cannot be null.");
  18. }
  20. if (cookies.size() != expectedCookies.size()) {
  21. System.out.println("Warning: Cookie counts do not match. Potential issue.");
  22. return false; // Different number of cookies - likely invalid.
  23. }
  25. for (Map.Entry<String, String> entry : expectedCookies.entrySet()) {
  26. String cookieName = entry.getKey();
  27. String expectedCookieValue = entry.getValue();
  28. String actualCookieValue = cookies.get(cookieName);
  30. if (actualCookieValue == null) {
  31. System.out.println("Warning: Missing cookie: " + cookieName + ". Potential issue.");
  32. return false; // Cookie missing
  33. }
  35. if (!actualCookieValue.equals(expectedCookieValue)) {
  36. System.out.println("Warning: Cookie " + cookieName + " mismatch. Expected: " + expectedCookieValue + ", Actual: " + actualCookieValue + ". Potential issue.");
  37. return false; // Cookie value mismatch
  38. }
  40. // Defensive check: Verify cookie length (prevent buffer overflows).
  41. if (actualCookieValue.length() > 4096) { //Arbitrary limit. Adjust as needed.
  42. System.out.println("Warning: Cookie " + cookieName + " exceeds maximum length. Potential issue.");
  43. return false;
  44. }
  45. }
  47. return true; // All cookies match.
  48. }
  50. public static void main(String[] args) {
  51. //Example usage
  52. Map<String, String> validCookies = new HashMap<>();
  53. validCookies.put("session_id", "abcdef1234567890");
  54. validCookies.put("user_id", "user123");
  56. Map<String, String> expectedCookies = new HashMap<>();
  57. expectedCookies.put("session_id", "abcdef1234567890");
  58. expectedCookies.put("user_id", "user123");
  60. boolean isValid = validateSessionCookies(validCookies, expectedCookies);
  61. System.out.println("Cookies are valid: " + isValid);
  63. //Example with a mismatch
  64. Map<String, String> invalidCookies = new HashMap<>();
  65. invalidCookies.put("session_id", "wrong_value");
  66. invalidCookies.put("user_id", "user123");
  68. isValid = validateSessionCookies(invalidCookies, expectedCookies);
  69. System.out.println("Cookies are valid: " + isValid);
  71. //Example with missing cookie
  72. Map<String, String> missingCookie = new HashMap<>();
  73. missingCookie.put("session_id", "abcdef1234567890");
  75. isValid = validateSessionCookies(missingCookie, expectedCookies);
  76. System.out.println("Cookies are valid: " + isValid);
  78. }
  79. }

Add your comment