Module org.refcodes.forwardsecrecy
Package org.refcodes.forwardsecrecy

Class ForwardSecrecyUtility

java.lang.Object
org.refcodes.forwardsecrecy.ForwardSecrecyUtility
public final class ForwardSecrecyUtility extends Object
The Class ForwardSecrecyUtility.

  • Field Details

  • Method Details

    • hasEncryptionPattern

      public static boolean hasEncryptionPattern(String aText)
      Returns true in case the given text provided the characteristics of an encrypted text as of the cipher and cipher UID pattern. ------------------------------------------------------------------------- CAUTION: A plain text may have the same characteristics, an encrypted text must have these characteristics! -------------------------------------------------------------------------
      Parameters:
      aText - The text to test whether it is encrypted.
      Returns:
      True in case the given text has the characteristics of an encrypted text

    • toCipherUidPrefix

      public static String toCipherUidPrefix(String aCipherUidWithEncryptedText)
      Expects a text with a prefixed cipher UID. Extracts the cipher UID with which the given text was encrypted.
      Parameters:
      aCipherUidWithEncryptedText - The encrypted text with the prefixed cipher UID
      Returns:
      The cipher UID or null if none cipher UID was found

    • toEncryptedTextBody

      public static String toEncryptedTextBody(String aCipherUidWithEncryptedText)
      Expects a text with a prefixed cipher UID. Extracts the encrypted Text without the prefixed cipher UID.
      Parameters:
      aCipherUidWithEncryptedText - The encrypted text with the prefixed cipher UID
      Returns:
      The encrypted text portion or null if none cipher UID was found (then we have an invalid format of the provided text)

    • createCipherUid

      public static String createCipherUid()
      Default way on how to create a cipher UID. In case the default way generated bad cipher UIDs, the default way's implementation is changed making it good again and all system using the default way. The timestamp is prepended so that regarding on the timestamp, encrypted texts can be easily selected, e.g. texts being encrypted with a cipher older than a given timestamp.
      Returns:
      A cipher UID created the default way.

    • createCipher

      public static String createCipher()
      Default way on how to create a cipher. In case the default way generated bad ciphers, the default way's implementation is changed making it secure again and all system using the default way.
      Returns:
      A cipher created the default way.

    • createMessage

      public static String createMessage()
      Default way on how to create a message which is to be signed in order to identify the owner of a public key.
      Returns:
      A message created the default way.

    • readPrivateKey

      public static PrivateKey readPrivateKey(File aFile, String aPassword) throws InvalidKeySpecException, NoSuchAlgorithmException, IOException
      Throws:
      InvalidKeySpecException
      NoSuchAlgorithmException
      IOException

    • readPublicKey

      public static PublicKey readPublicKey(File aFile) throws InvalidKeySpecException, NoSuchAlgorithmException, IOException
      Throws:
      InvalidKeySpecException
      NoSuchAlgorithmException
      IOException