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Bouncy Castle Cryptography 1.11 API Specification: Class ECDSASigner

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Bouncy Castle Cryptography 1.11

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org.bouncycastle.crypto.signers
Class ECDSASigner

java.lang.Object
  |
  +--org.bouncycastle.crypto.signers.ECDSASigner

All Implemented Interfaces:: DSA, ECConstants

public class ECDSASigner
extends java.lang.Object
implements ECConstants, DSA

EC-DSA as described in X9.62

Fields inherited from interface org.bouncycastle.math.ec.ECConstants

ONE, ZERO

Constructor Summary

ECDSASigner()


Method Summary

java.math.BigInteger[] generateSignature(byte[] message)
          generate a signature for the given message using the key we were initialised with.

void init(boolean forSigning, CipherParameters param)
          initialise the signer for signature generation or signature verification.

boolean verifySignature(byte[] message, java.math.BigInteger r, java.math.BigInteger s)
          return true if the value r and s represent a DSA signature for the passed in message (for standard DSA the message should be a SHA-1 hash of the real message to be verified).

Methods inherited from class java.lang.Object

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

Constructor Detail

ECDSASigner

public ECDSASigner()

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

Following copied from interface: org.bouncycastle.crypto.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 DSA the message should be a SHA-1 hash of the message of interest.

Specified by:: generateSignature in interface DSA

Parameters:: message - the message that will be verified later.

verifySignature

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

return true if the value r and s represent a DSA signature for the passed in message (for standard DSA the message should be a SHA-1 hash of the real message to be verified).

Specified by:: verifySignature in interface DSA