Package org.bouncycastle.crypto

Interface DSA

All Known Subinterfaces:
DSAExt
All Known Implementing Classes:
DSASigner, DSTU4145Signer, ECDSASigner, ECGOST3410_2012Signer, ECGOST3410Signer, ECNRSigner, GOST3410Signer
public interface DSA
interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.

  • Method Summary

    Modifier and Type
    Method
    Description
    BigInteger[]
    generateSignature(byte[] message)
    sign the passed in message (usually the output of a hash function).
    void
    init(boolean forSigning, CipherParameters param)
    initialise the signer for signature generation or signature verification.
    boolean
    verifySignature(byte[] message, BigInteger r, BigInteger s)
    verify the message message against the signature values r and s.

  • Method Details

    • init

      void init(boolean forSigning, CipherParameters param)
      initialise the signer for signature generation or signature verification.
      Parameters:
      forSigning - true if we are generating a signature, false otherwise.
      param - key parameters for signature generation.

    • generateSignature

      BigInteger[] generateSignature(byte[] message)
      sign the passed in message (usually the output of a hash function).
      Parameters:
      message - the message to be signed.
      Returns:
      two big integers representing the r and s values respectively.

    • verifySignature

      boolean verifySignature(byte[] message, BigInteger r, BigInteger s)
      verify the message message against the signature values r and s.
      Parameters:
      message - the message that was supposed to have been signed.
      r - the r signature value.
      s - the s signature value.