protected byte[] engineSign() throws SignatureException {
byte[] hash = new byte[digest.getDigestSize()];
digest.doFinal(hash, 0);
try {
BigInteger[] sig = signer.generateSignature(hash);
return encoder.encode(sig[0], sig[1]);
} catch (Exception e) {
throw new SignatureException(e.toString());
}
}
protected boolean engineVerify(byte[] sigBytes) throws SignatureException {
byte[] hash = new byte[digest.getDigestSize()];
digest.doFinal(hash, 0);
BigInteger[] sig;
try {
sig = encoder.decode(sigBytes);
} catch (Exception e) {
throw new SignatureException("error decoding signature bytes.");
}
return signer.verifySignature(hash, sig[0], sig[1]);
}