ECNRSigner (Bouncy Castle Library 1.37 API Specification)

Class ECNRSigner

public class ECNRSigner extends Object implements DSA

EC-NR as described in IEEE 1363-2000

Method Summary
BigInteger[]	generateSignature(byte[] digest) generate a signature for the given message using the key we were initialised with.
void	init(boolean forSigning, CipherParameters param)
boolean	verifySignature(byte[] digest, BigInteger r, BigInteger s) return true if the value r and s represent a signature for the message passed in.

Method Summary

BigInteger[]

generateSignature(byte[] digest)

generate a signature for the given message using the key we were initialised with.

void

init(boolean forSigning, CipherParameters param)

boolean

verifySignature(byte[] digest, BigInteger r, BigInteger s)

return true if the value r and s represent a signature for the message passed in.

Method Detail

public BigInteger[] generateSignature(byte[] digest)

generate a signature for the given message using the key we were initialised with. Generally, the order of the curve should be at least as long as the hash of the message of interest, and with ECNR it *must* be at least as long.

Parameters: digest the digest to be signed.

Throws: DataLengthException if the digest is longer than the key allows

public void init(boolean forSigning, CipherParameters param)

public boolean verifySignature(byte[] digest, BigInteger r, BigInteger s)

return true if the value r and s represent a signature for the message passed in. Generally, the order of the curve should be at least as long as the hash of the message of interest, and with ECNR, it *must* be at least as long. But just in case the signer applied mod(n) to the longer digest, this implementation will apply mod(n) during verification.

Parameters: digest the digest to be verified. r the r value of the signature. s the s value of the signature.

Throws: DataLengthException if the digest is longer than the key allows