/**
* Loop to encode a data packet nIterations times.
* @param nIterations The number of iterations.
* @param useComplex If true, use a large name, large content and all fields.
* If false, use a small name, small content
* and only required fields.
* @param useCrypto If true, sign the data packet. If false, use a blank
* signature.
* @param keyType KeyType.RSA or EC, used if useCrypto is true.
* @param encoding Set encoding[0] to the wire encoding.
* @return The number of seconds for all iterations.
*/
private static double benchmarkEncodeDataSeconds(int nIterations, bool useComplex, bool useCrypto, KeyType keyType,
Blob[] encoding)
{
Name name;
Blob content;
if (useComplex) {
// Use a large name and content.
name = new Name
("/ndn/ucla.edu/apps/lwndn-test/numbers.txt/%FD%05%05%E8%0C%CE%1D/%00");
StringBuilder contentStream = new StringBuilder();
int count = 1;
contentStream.append(count++);
while (contentStream.toString().Length < 1115)
contentStream.append(" ").append(count++);
content = new Blob(contentStream.toString());
}
else {
// Use a small name and content.
name = new Name("/test");
content = new Blob("abc");
}
Name.Component finalBlockId =
new Name.Component(new Blob(new byte[] { (byte)0 }));
// Initialize the KeyChain storage in case useCrypto is true.
MemoryIdentityStorage identityStorage = new MemoryIdentityStorage();
MemoryPrivateKeyStorage privateKeyStorage = new MemoryPrivateKeyStorage();
KeyChain keyChain = new KeyChain
(new IdentityManager(identityStorage, privateKeyStorage),
new SelfVerifyPolicyManager(identityStorage));
Name keyName = new Name("/testname/DSK-123");
Name certificateName = keyName.getSubName(0, keyName.size() - 1).append
("KEY").append(keyName.get(-1)).append("ID-CERT").append("0");
privateKeyStorage.setKeyPairForKeyName
(keyName, KeyType.RSA, new ByteBuffer(DEFAULT_RSA_PUBLIC_KEY_DER),
new ByteBuffer(DEFAULT_RSA_PRIVATE_KEY_DER));
Blob signatureBits = new Blob(new byte[256]);
Blob emptyBlob = new Blob(new byte[0]);
double start = getNowSeconds();
for (int i = 0; i < nIterations; ++i) {
Data data = new Data(name);
data.setContent(content);
if (useComplex) {
data.getMetaInfo().setFreshnessPeriod(30000);
data.getMetaInfo().setFinalBlockId(finalBlockId);
}
if (useCrypto)
// This sets the signature fields.
keyChain.sign(data, certificateName);
else {
// Imitate IdentityManager.signByCertificate to set up the signature
// fields, but don't sign.
KeyLocator keyLocator = new KeyLocator();
keyLocator.setType(KeyLocatorType.KEYNAME);
keyLocator.setKeyName(certificateName);
Sha256WithRsaSignature sha256Signature =
(Sha256WithRsaSignature)data.getSignature();
sha256Signature.setKeyLocator(keyLocator);
sha256Signature.setSignature(signatureBits);
}
encoding[0] = data.wireEncode();
}
double finish = getNowSeconds();
return finish - start;
}
/// <summary>
/// Append a timestamp component and a random value component to interest's
/// name. This ensures that the timestamp is greater than the timestamp used in
/// the previous call. Then use keyChain to sign the interest which appends a
/// SignatureInfo component and a component with the signature bits. If the
/// interest lifetime is not set, this sets it.
/// </summary>
///
/// <param name="interest">The interest whose name is append with components.</param>
/// <param name="keyChain">The KeyChain for calling sign.</param>
/// <param name="certificateName">The certificate name of the key to use for signing.</param>
/// <param name="wireFormat"></param>
public void generate(Interest interest, KeyChain keyChain,
Name certificateName, WireFormat wireFormat)
{
double timestamp;
lock (lastTimestampLock_) {
timestamp = Math.Round(net.named_data.jndn.util.Common.getNowMilliseconds(),MidpointRounding.AwayFromZero);
while (timestamp <= lastTimestamp_)
timestamp += 1.0d;
// Update the timestamp now while it is locked. In the small chance that
// signing fails, it just means that we have bumped the timestamp.
lastTimestamp_ = timestamp;
}
// The timestamp is encoded as a TLV nonNegativeInteger.
TlvEncoder encoder = new TlvEncoder(8);
encoder.writeNonNegativeInteger((long) timestamp);
interest.getName().append(new Blob(encoder.getOutput(), false));
// The random value is a TLV nonNegativeInteger too, but we know it is 8 bytes,
// so we don't need to call the nonNegativeInteger encoder.
ByteBuffer randomBuffer = ILOG.J2CsMapping.NIO.ByteBuffer.allocate(8);
// Note: SecureRandom is thread safe.
net.named_data.jndn.util.Common.getRandom().nextBytes(randomBuffer.array());
interest.getName().append(new Blob(randomBuffer, false));
keyChain.sign(interest, certificateName, wireFormat);
if (interest.getInterestLifetimeMilliseconds() < 0)
// The caller has not set the interest lifetime, so set it here.
interest.setInterestLifetimeMilliseconds(1000.0d);
}
static void Main(string[] args)
{
var data = new Data();
data.wireDecode(new Blob(TlvData));
Console.Out.WriteLine("Decoded Data:");
dumpData(data);
// Set the content again to clear the cached encoding so we encode again.
data.setContent(data.getContent());
var encoding = data.wireEncode();
var reDecodedData = new Data();
reDecodedData.wireDecode(encoding);
Console.Out.WriteLine("");
Console.Out.WriteLine("Re-decoded Data:");
dumpData(reDecodedData);
var identityStorage = new MemoryIdentityStorage();
var privateKeyStorage = new MemoryPrivateKeyStorage();
var keyChain = new KeyChain
(new IdentityManager(identityStorage, privateKeyStorage),
new SelfVerifyPolicyManager(identityStorage));
// Initialize the storage.
var keyName = new Name("/testname/DSK-123");
var certificateName = keyName.getSubName(0, keyName.size() - 1).append
("KEY").append(keyName.get(-1)).append("ID-CERT").append("0");
identityStorage.addKey(keyName, KeyType.RSA, new Blob(DEFAULT_RSA_PUBLIC_KEY_DER));
privateKeyStorage.setKeyPairForKeyName
(keyName, KeyType.RSA, new ByteBuffer(DEFAULT_RSA_PUBLIC_KEY_DER),
new ByteBuffer(DEFAULT_RSA_PRIVATE_KEY_DER));
VerifyCallbacks callbacks = new VerifyCallbacks("Re-decoded Data");
keyChain.verifyData(reDecodedData, callbacks, callbacks);
var freshData = new Data(new Name("/ndn/abc"));
freshData.setContent(new Blob("SUCCESS!"));
freshData.getMetaInfo().setFreshnessPeriod(5000);
freshData.getMetaInfo().setFinalBlockId(new Name("/%00%09").get(0));
keyChain.sign(freshData, certificateName);
Console.Out.WriteLine("");
Console.Out.WriteLine("Freshly-signed Data:");
dumpData(freshData);
callbacks = new VerifyCallbacks("Freshly-signed Data");
keyChain.verifyData(freshData, callbacks, callbacks);
}