/// <summary>
/// Append a SignatureInfo for DigestSha256 to the Interest name, digest the
/// name components and append a final name component with the signature bits
/// (which is the digest).
/// </summary>
///
/// <param name="interest"></param>
/// <param name="wireFormat">A WireFormat object used to encode the input.</param>
public void signInterestWithSha256(Interest interest,
WireFormat wireFormat)
{
DigestSha256Signature signature = new DigestSha256Signature();
// Append the encoded SignatureInfo.
interest.getName().append(wireFormat.encodeSignatureInfo(signature));
// Append an empty signature so that the "signedPortion" is correct.
interest.getName().append(new Name.Component());
// Encode once to get the signed portion.
SignedBlob encoding = interest.wireEncode(wireFormat);
// Digest and set the signature.
byte[] signedPortionDigest = net.named_data.jndn.util.Common.digestSha256(encoding.signedBuf());
signature.setSignature(new Blob(signedPortionDigest, false));
// Remove the empty signature and append the real one.
interest.setName(interest.getName().getPrefix(-1)
.append(wireFormat.encodeSignatureValue(signature)));
}
