static void Main(string[] args)
{
var data = new Data();
data.wireDecode(new Blob(TlvData));
// Use a hard-wired secret for testing. In a real application the signer
// ensures that the verifier knows the shared key and its keyName.
var key = new Blob(new byte[] {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
});
if (KeyChain.verifyDataWithHmacWithSha256(data, key))
Console.Out.WriteLine("Hard-coded data signature verification: VERIFIED");
else
Console.Out.WriteLine("Hard-coded data signature verification: FAILED");
var freshData = new Data(new Name("/ndn/abc"));
var signature = new HmacWithSha256Signature();
signature.getKeyLocator().setType(KeyLocatorType.KEYNAME);
signature.getKeyLocator().setKeyName(new Name("key1"));
freshData.setSignature(signature);
freshData.setContent(new Blob("SUCCESS!"));
Console.Out.WriteLine("Signing fresh data packet " + freshData.getName().toUri());
KeyChain.signWithHmacWithSha256(freshData, key);
if (KeyChain.verifyDataWithHmacWithSha256(freshData, key))
Console.Out.WriteLine("Freshly-signed data signature verification: VERIFIED");
else
Console.Out.WriteLine("Freshly-signed data signature verification: FAILED");
}
/**
* 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;
}
/**
* Call benchmarkEncodeDataSeconds and benchmarkDecodeDataSeconds with
* appropriate nInterations. Print the results to System.out.
* @param useComplex See benchmarkEncodeDataSeconds.
* @param useCrypto See benchmarkEncodeDataSeconds and
* benchmarkDecodeDataSeconds.
* @param keyType KeyType.RSA or EC, used if useCrypto is true.
*/
private static void benchmarkEncodeDecodeData(bool useComplex, bool useCrypto, KeyType keyType)
{
String format = "TLV";
Blob[] encoding = new Blob[1];
{
int nIterations = useCrypto ? 30 : 200000;
double duration = benchmarkEncodeDataSeconds
(nIterations, useComplex, useCrypto, keyType, encoding);
Console.Out.WriteLine("Encode " + (useComplex ? "complex " : "simple ") +
format + " data: Crypto? " +
(useCrypto ? (keyType == KeyType.ECDSA ? "EC " : "RSA") : "no ") +
", Duration sec, Hz: " + duration + ", " + (nIterations / duration));
}
{
// Use an extra long duration for decoding until we understand why it gets
// a different rate at a shorter duration.
int nIterations = useCrypto ? 1000 : 200000;
double duration = benchmarkDecodeDataSeconds
(nIterations, useCrypto, keyType, encoding[0]);
Console.Out.WriteLine("Decode " + (useComplex ? "complex " : "simple ") +
format + " data: Crypto? " +
(useCrypto ? (keyType == KeyType.ECDSA ? "EC " : "RSA") : "no ") +
", Duration sec, Hz: " + duration + ", " + (nIterations / duration));
}
}
/**
* Loop to decode a data packet nIterations times.
* @param nIterations The number of iterations.
* @param useCrypto If true, verify the signature. If false, don't verify.
* @param keyType KeyType.RSA or EC, used if useCrypto is true.
* @param encoding The wire encoding to decode.
* @return The number of seconds for all iterations.
* @throws EncodingException
*/
private static double benchmarkDecodeDataSeconds(int nIterations, bool useCrypto, KeyType keyType, Blob encoding)
{
// Initialize the KeyChain storage in case useCrypto is true.
MemoryIdentityStorage identityStorage = new MemoryIdentityStorage();
KeyChain keyChain = new KeyChain
(new IdentityManager(identityStorage, new MemoryPrivateKeyStorage()),
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");
identityStorage.addKey(keyName, KeyType.RSA, new Blob(DEFAULT_RSA_PUBLIC_KEY_DER));
VerifyCallbacks callbacks = new VerifyCallbacks();
double start = getNowSeconds();
for (int i = 0; i < nIterations; ++i) {
Data data = new Data();
data.wireDecode(encoding.buf());
if (useCrypto)
keyChain.verifyData(data, callbacks, callbacks);
}
double finish = getNowSeconds();
return finish - start;
}
