Constructor Detail

• ECGOST3410Signer

  public ECGOST3410Signer()

Method Detail

• init

  public void init​(boolean forSigning,
                   CipherParameters param)

  Description copied from interface: DSA
  initialise the signer for signature generation or signature verification.

  Specified by:

  init in interface DSA

  Parameters:

  forSigning - true if we are generating a signature, false otherwise.

  param - key parameters for signature generation.

• generateSignature

  public java.math.BigInteger[] generateSignature​(byte[] message)

  generate a signature for the given message using the key we were initialised with. For conventional GOST3410 the message should be a GOST3411 hash of the message of interest.

  Specified by:

  generateSignature in interface DSA

  Parameters:

  message - the message that will be verified later.

  Returns:

  two big integers representing the r and s values respectively.

• verifySignature

  public boolean verifySignature​(byte[] message,
                                 java.math.BigInteger r,
                                 java.math.BigInteger s)

  return true if the value r and s represent a GOST3410 signature for the passed in message (for standard GOST3410 the message should be a GOST3411 hash of the real message to be verified).

  Specified by:

  verifySignature in interface DSA

  Parameters:

  message - the message that was supposed to have been signed.

  r - the r signature value.

  s - the s signature value.

• createBasePointMultiplier

  protected ECMultiplier createBasePointMultiplier()