Creates inbound message
if (length == 0) {
fatalAlert(AlertProtocol.DECODE_ERROR,
"DECODE ERROR: incorrect CertificateVerify");
} else {
if (in.readUint16() != length - 2) {
fatalAlert(AlertProtocol.DECODE_ERROR,
"DECODE ERROR: incorrect CertificateVerify");
}
signedHash = in.read(length -2);
}
this.length = length;