Package org.bouncycastle.crypto.signers

Class HashMLDSASigner

java.lang.Object
org.bouncycastle.crypto.signers.HashMLDSASigner
All Implemented Interfaces:
Signer
public class HashMLDSASigner extends Object implements Signer

  • Constructor Summary

    Constructors
    Constructor
    Description
    HashMLDSASigner()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    byte[]
    generateSignature()
    generate a signature for the message we've been loaded with using the key we were initialised with.
    byte[]
    generateSignature(byte[] hash)
    Sign a message that has already been hashed externally.
    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
    boolean
    verifySignature(byte[] signature)
    return true if the internal state represents the signature described in the passed in array.
    boolean
    verifySignature(byte[] hash, byte[] signature)
    Verify a signature over a message that has already been hashed externally; companion to generateSignature(byte[]).

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • HashMLDSASigner

      public HashMLDSASigner()

  • Method Details

    • 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.

    • update

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

    • update

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

    • generateSignature

      public byte[] generateSignature() throws CryptoException, DataLengthException
      Description copied from interface: Signer
      generate a signature for the message we've been loaded with using the key we were initialised with.
      Specified by:
      generateSignature in interface Signer
      Throws:
      CryptoException
      DataLengthException

    • verifySignature

      public boolean verifySignature(byte[] signature)
      Description copied from interface: Signer
      return true if the internal state represents the signature described in the passed in array.
      Specified by:
      verifySignature in interface Signer

    • generateSignature

      public byte[] generateSignature(byte[] hash) throws CryptoException, DataLengthException
      Sign a message that has already been hashed externally. See FIPS 204 sec. 5.4 (HashML-DSA): the caller supplies the digest of the message and the signer absorbs it together with the DER encoding of the digest algorithm's OID (derived from the parameter set this signer was initialised with) into the mu computation, just as the streaming form would. The supplied hash must have been produced with the digest algorithm matching the configured parameter set.
      Parameters:
      hash - the digest of the message.
      Returns:
      the ML-DSA signature.
      Throws:
      CryptoException
      DataLengthException

    • verifySignature

      public boolean verifySignature(byte[] hash, byte[] signature)
      Verify a signature over a message that has already been hashed externally; companion to generateSignature(byte[]).
      Parameters:
      hash - the digest of the message.
      signature - the candidate signature.
      Returns:
      true if the signature is valid.

    • reset

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