Package org.bouncycastle.crypto.signers

Class ISO9796d2Signer

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      byte[] generateSignature()
      generate a signature for the loaded message using the key we were initialised with.
      byte[] getRecoveredMessage()
      Return a reference to the recoveredMessage message, either as it was added to a just generated signature, or extracted from a verified one.
      boolean hasFullMessage()
      Return true if the full message was recoveredMessage.
      void init​(boolean forSigning, CipherParameters param)
      Initialise the signer for signing or verification.
      void reset()
      reset the internal state
      void update​(byte b)
      update the internal digest with the byte b
      void update​(byte[] in, int off, int len)
      update the internal digest with the byte array in
      void updateWithRecoveredMessage​(byte[] signature)
      Perform an update with the recovered message before adding any other data.
      boolean verifySignature​(byte[] signature)
      return true if the signature represents a ISO9796-2 signature for the passed in message.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • TRAILER_IMPLICIT

        public static final int TRAILER_IMPLICIT
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_RIPEMD160

        public static final int TRAILER_RIPEMD160
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_RIPEMD128

        public static final int TRAILER_RIPEMD128
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_SHA1

        public static final int TRAILER_SHA1
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_SHA256

        public static final int TRAILER_SHA256
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_SHA512

        public static final int TRAILER_SHA512
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_SHA384

        public static final int TRAILER_SHA384
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

      • TRAILER_WHIRLPOOL

        public static final int TRAILER_WHIRLPOOL
        Deprecated.
        use ISOTrailers
        See Also:
        Constant Field Values

    • Constructor Detail

      • ISO9796d2Signer

        public ISO9796d2Signer​(AsymmetricBlockCipher cipher,
                       Digest digest,
                       boolean implicit)
        Generate a signer with either implicit or explicit trailers for ISO9796-2.
        Parameters:
        cipher - base cipher to use for signature creation/verification
        digest - digest to use.
        implicit - whether or not the trailer is implicit or gives the hash.

      • ISO9796d2Signer

        public ISO9796d2Signer​(AsymmetricBlockCipher cipher,
                       Digest digest)
        Constructor for a signer with an explicit digest trailer.
        Parameters:
        cipher - cipher to use.
        digest - digest to sign with.

    • Method Detail

      • init

        public void init​(boolean forSigning,
                 CipherParameters param)
        Description copied from interface: Signer
        Initialise the signer for signing or verification.
        Specified by:
        init in interface Signer
        Parameters:
        forSigning - true if for signing, false otherwise
        param - necessary parameters.

      • updateWithRecoveredMessage

        public void updateWithRecoveredMessage​(byte[] signature)
                                throws InvalidCipherTextException
        Description copied from interface: SignerWithRecovery
        Perform an update with the recovered message before adding any other data. This must be the first update method called, and calling it will result in the signer assuming that further calls to update will include message content past what is recoverable.
        Specified by:
        updateWithRecoveredMessage in interface SignerWithRecovery
        Parameters:
        signature - the signature that we are in the process of verifying.
        Throws:
        InvalidCipherTextException

      • update

        public void update​(byte b)
        update the internal digest with the byte b
        Specified by:
        update in interface Signer

      • update

        public void update​(byte[] in,
                   int off,
                   int len)
        update the internal digest with the byte array in
        Specified by:
        update in interface Signer

      • reset

        public void reset()
        reset the internal state
        Specified by:
        reset in interface Signer

      • verifySignature

        public boolean verifySignature​(byte[] signature)
        return true if the signature represents a ISO9796-2 signature for the passed in message.
        Specified by:
        verifySignature in interface Signer