private void verifySignature(
final ByteBuf buf, final int readerBefore, final int len, final boolean donePayload)
throws SignatureException, InvalidKeyException {
if (!message.isSign()) {
return;
}
// if we read the complete data, we also read the signature
// for the verification, we should not use this for the signature
final int length = donePayload ? len - signatureFactory.signatureSize() : len;
ByteBuffer[] byteBuffers = buf.nioBuffers(readerBefore, length);
if (signature == null) {
signature = signatureFactory.update(message.publicKey(0), byteBuffers);
} else {
for (int i = 0; i < byteBuffers.length; i++) {
signature.update(byteBuffers[i]);
}
}
if (donePayload) {
byte[] signatureReceived = message.receivedSignature().encode();
LOG.debug("Verifying received signature: {}", Arrays.toString(signatureReceived));
if (signature.verify(signatureReceived)) {
// set public key only if signature is correct
message.setVerified();
LOG.debug("Signature check OK.");
} else {
LOG.warn("Signature check NOT OK. Message: {}.", message);
}
}
}
