C# Interest.wireEncode方法代码示例

        public void testMaxNdnPacketSize()
        {
            // Construct an interest whose encoding is one byte larger than getMaxNdnPacketSize.
            int targetSize = net.named_data.jndn.Face.getMaxNdnPacketSize() + 1;
            // Start with an interest which is almost the right size.
            Interest interest = new Interest();
            interest.getName().append(new byte[targetSize]);
            int initialSize = interest.wireEncode().size();
            // Now replace the component with the desired size which trims off the extra encoding.
            interest.setName(new Name().append(new byte[targetSize
                    - (initialSize - targetSize)]));
            int interestSize = interest.wireEncode().size();
            AssertEquals("Wrong interest size for MaxNdnPacketSize", targetSize,
                    interestSize);

            CallbackCounter counter = new CallbackCounter();
            bool gotError = true;
            try {
                face.expressInterest(interest, counter, counter);
                gotError = false;
            } catch (Exception ex) {
            }
            if (!gotError)
                Fail("expressInterest didn't throw an exception when the interest size exceeds getMaxNdnPacketSize()");
        }

        static void Main(string[] args)
        {
            var interest = new Interest();
              interest.wireDecode(new Blob(TlvInterest));
              Console.Out.WriteLine("Interest:");
              dumpInterest(interest);

              // Set the name again to clear the cached encoding so we encode again.
              interest.setName(interest.getName());
              var encoding = interest.wireEncode();
              Console.Out.WriteLine("");
              Console.Out.WriteLine("Re-encoded interest " + encoding.toHex());

              var reDecodedInterest = new Interest();
              reDecodedInterest.wireDecode(encoding);
              Console.Out.WriteLine("");
              Console.Out.WriteLine("Re-decoded Interest:");
              dumpInterest(reDecodedInterest);

              var freshInterest = new Interest(new Name("/ndn/abc"));
              freshInterest.setMinSuffixComponents(4);
              freshInterest.setMaxSuffixComponents(6);
              freshInterest.setInterestLifetimeMilliseconds(30000);
              freshInterest.setChildSelector(1);
              freshInterest.setMustBeFresh(true);
              freshInterest.getKeyLocator().setType(KeyLocatorType.KEY_LOCATOR_DIGEST);
              freshInterest.getKeyLocator().setKeyData
            (new Blob(new byte[] {
              0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
              0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F }));
              freshInterest.getExclude().appendComponent(new Name("abc").get(0)).appendAny();

              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));

              // Make a Face just so that we can sign the interest.
              var face = new Face("localhost");
              face.setCommandSigningInfo(keyChain, certificateName);
              face.makeCommandInterest(freshInterest);

              Interest reDecodedFreshInterest = new Interest();
              reDecodedFreshInterest.wireDecode(freshInterest.wireEncode());
              Console.Out.WriteLine("");
              Console.Out.WriteLine("Re-decoded fresh Interest:");
              dumpInterest(reDecodedFreshInterest);

              VerifyCallbacks callbacks = new VerifyCallbacks("Freshly-signed Interest");
              keyChain.verifyInterest(reDecodedFreshInterest, callbacks, callbacks);
        }

        /// <summary>
        /// Use wireFormat.decodeSignatureInfoAndValue to decode the last two name
        /// components of the signed interest. Look in the IdentityStorage for the
        /// public key with the name in the KeyLocator (if available) and use it to
        /// verify the interest. If the public key can't be found, call onVerifyFailed.
        /// </summary>
        ///
        /// <param name="interest">The interest with the signature to check.</param>
        /// <param name="stepCount"></param>
        /// <param name="onVerified">NOTE: The library will log any exceptions thrown by this callback, but for better error handling the callback should catch and properly handle any exceptions.</param>
        /// <param name="onValidationFailed">onValidationFailed.onInterestValidationFailed(interest, reason). NOTE: The library will log any exceptions thrown by this callback, but for better error handling the callback should catch and properly handle any exceptions.</param>
        /// <returns>null for no further step for looking up a certificate chain.</returns>
        public override ValidationRequest checkVerificationPolicy(Interest interest,
				int stepCount, OnVerifiedInterest onVerified,
				OnInterestValidationFailed onValidationFailed, WireFormat wireFormat)
        {
            if (interest.getName().size() < 2) {
                try {
                    onValidationFailed.onInterestValidationFailed(interest,
                            "The signed interest has less than 2 components: "
                                    + interest.getName().toUri());
                } catch (Exception exception) {
                    logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                            "Error in onInterestValidationFailed", exception);
                }
                return null;
            }

            // Decode the last two name components of the signed interest
            Signature signature;
            try {
                signature = wireFormat.decodeSignatureInfoAndValue(interest
                        .getName().get(-2).getValue().buf(), interest.getName()
                        .get(-1).getValue().buf(), false);
            } catch (EncodingException ex) {
                logger_.log(
                        ILOG.J2CsMapping.Util.Logging.Level.INFO,
                        "Cannot decode the signed interest SignatureInfo and value",
                        ex);
                try {
                    onValidationFailed.onInterestValidationFailed(interest,
                            "Error decoding the signed interest signature: " + ex);
                } catch (Exception exception_0) {
                    logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                            "Error in onInterestValidationFailed", exception_0);
                }
                return null;
            }

            String[] failureReason = new String[] { "unknown" };
            // wireEncode returns the cached encoding if available.
            if (verify(signature, interest.wireEncode(wireFormat), failureReason)) {
                try {
                    onVerified.onVerifiedInterest(interest);
                } catch (Exception ex_1) {
                    logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onVerifiedInterest", ex_1);
                }
            } else {
                try {
                    onValidationFailed.onInterestValidationFailed(interest,
                            failureReason[0]);
                } catch (Exception ex_2) {
                    logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                            "Error in onInterestValidationFailed", ex_2);
                }
            }

            // No more steps, so return a null ValidationRequest.
            return null;
        }

        /// <summary>
        /// Append a SignatureInfo to the Interest name, sign the name components and
        /// append a final name component with the signature bits.
        /// </summary>
        ///
        /// <param name="interest"></param>
        /// <param name="certificateName">The certificate name of the key to use for signing.</param>
        /// <param name="wireFormat">A WireFormat object used to encode the input.</param>
        public void signInterestByCertificate(Interest interest,
				Name certificateName, WireFormat wireFormat)
        {
            DigestAlgorithm[] digestAlgorithm = new DigestAlgorithm[1];
            Signature signature = makeSignatureByCertificate(certificateName,
                    digestAlgorithm);

            // 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, and sign.
            SignedBlob encoding = interest.wireEncode(wireFormat);
            signature.setSignature(privateKeyStorage_.sign(encoding.signedBuf(),
                    net.named_data.jndn.security.certificate.IdentityCertificate
                            .certificateNameToPublicKeyName(certificateName),
                    digestAlgorithm[0]));

            // Remove the empty signature and append the real one.
            interest.setName(interest.getName().getPrefix(-1)
                    .append(wireFormat.encodeSignatureValue(signature)));
        }

        public void testEncodeDecodeInterestWithLink()
        {
            Link link1 = new Link();
            link1.setName(new Name("test"));
            link1.addDelegation(10, new Name("/test1"));
            link1.addDelegation(20, new Name("/test2"));
            link1.addDelegation(100, new Name("/test3"));

            try {
                keyChain.sign(link1, certificateName);
            } catch (SecurityException ex) {
                Assert.Fail(ex.Message);
            }

            Interest interestA = new Interest();
            interestA.setName(new Name("/Test/Encode/Decode/With/Link"));
            interestA.setChildSelector(1);
            interestA.setInterestLifetimeMilliseconds(10000);
            interestA.setLinkWireEncoding(link1.wireEncode());

            Blob interestEncoding = interestA.wireEncode();
            Interest interestB = new Interest();
            try {
                interestB.wireDecode(interestEncoding);
            } catch (EncodingException ex_0) {
                Assert.Fail(ex_0.Message);
            }

            Assert.AssertEquals(interestA.getName(), interestB.getName());

            Link link2 = null;
            try {
                link2 = interestB.getLink();
            } catch (Exception ex_1) {
                Assert.Fail("interestB.getLink(): " + ex_1.Message);
            }

            Assert.AssertTrue("Interest link object not specified", link2 != null);
            DelegationSet delegations = link2.getDelegations();
            for (int i = 0; i < delegations.size(); ++i) {
                if (i == 0) {
                    Assert.AssertEquals(10, delegations.get(i).getPreference());
                    Assert.AssertEquals(new Name("/test1"), delegations.get(i).getName());
                }
                if (i == 1) {
                    Assert.AssertEquals(20, delegations.get(i).getPreference());
                    Assert.AssertEquals(new Name("/test2"), delegations.get(i).getName());
                }
                if (i == 2) {
                    Assert.AssertEquals(100, delegations.get(i).getPreference());
                    Assert.AssertEquals(new Name("/test3"), delegations.get(i).getName());
                }
            }
        }

        /// <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)));
        }

        /// <summary>
        /// Do the work of expressInterest once we know we are connected. Add the entry
        /// to the PIT, encode and send the interest.
        /// </summary>
        ///
        /// <param name="pendingInterestId"></param>
        /// <param name="interestCopy"></param>
        /// <param name="onData"></param>
        /// <param name="onTimeout"></param>
        /// <param name="onNetworkNack"></param>
        /// <param name="wireFormat">A WireFormat object used to encode the message.</param>
        /// <param name="face"></param>
        /// <exception cref="IOException">For I/O error in sending the interest.</exception>
        /// <exception cref="System.Exception">If the encoded interest size exceeds getMaxNdnPacketSize().</exception>
        internal void expressInterestHelper(long pendingInterestId,
				Interest interestCopy, OnData onData, OnTimeout onTimeout,
				OnNetworkNack onNetworkNack, WireFormat wireFormat, Face face)
        {
            PendingInterestTable.Entry pendingInterest = pendingInterestTable_
                    .add(pendingInterestId, interestCopy, onData, onTimeout,
                            onNetworkNack);
            if (pendingInterest == null)
                // removePendingInterest was already called with the pendingInterestId.
                return;

            if (onTimeout != null
                    || interestCopy.getInterestLifetimeMilliseconds() >= 0.0d) {
                // Set up the timeout.
                double delayMilliseconds = interestCopy
                        .getInterestLifetimeMilliseconds();
                if (delayMilliseconds < 0.0d)
                    // Use a default timeout delay.
                    delayMilliseconds = 4000.0d;

                face.callLater(delayMilliseconds, new Node.Anonymous_C0 (this, pendingInterest));
            }

            // Special case: For timeoutPrefix_ we don't actually send the interest.
            if (!timeoutPrefix_.match(interestCopy.getName())) {
                Blob encoding = interestCopy.wireEncode(wireFormat);
                if (encoding.size() > getMaxNdnPacketSize())
                    throw new Exception(
                            "The encoded interest size exceeds the maximum limit getMaxNdnPacketSize()");
                transport_.send(encoding.buf());
            }
        }

        /// <summary>
        /// Check whether the received signed interest complies with the verification
        /// policy, and get the indication of the next verification step.
        /// </summary>
        ///
        /// <param name="interest">The interest with the signature to check.</param>
        /// <param name="stepCount"></param>
        /// <param name="onVerified">better error handling the callback should catch and properly handle any exceptions.</param>
        /// <param name="onValidationFailed">NOTE: The library will log any exceptions thrown by this callback, but for better error handling the callback should catch and properly handle any exceptions.</param>
        /// <returns>the indication of next verification step, null if there is no
        /// further step.</returns>
        public override sealed ValidationRequest checkVerificationPolicy(Interest interest,
				int stepCount, OnVerifiedInterest onVerified,
				OnInterestValidationFailed onValidationFailed, WireFormat wireFormat)
        {
            String[] failureReason = new String[] { "unknown" };
            Signature signature = extractSignature(interest, wireFormat,
                    failureReason);
            if (signature == null) {
                // Can't get the signature from the interest name.
                try {
                    onValidationFailed.onInterestValidationFailed(interest,
                            failureReason[0]);
                } catch (Exception ex) {
                    logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                            "Error in onInterestValidationFailed", ex);
                }
                return null;
            }

            // For command interests, we need to ignore the last 4 components when
            //   matching the name.
            Interest certificateInterest = getCertificateInterest(stepCount,
                    "interest", interest.getName().getPrefix(-4), signature,
                    failureReason);
            if (certificateInterest == null) {
                try {
                    onValidationFailed.onInterestValidationFailed(interest,
                            failureReason[0]);
                } catch (Exception ex_0) {
                    logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                            "Error in onInterestValidationFailed", ex_0);
                }
                return null;
            }

            if (certificateInterest.getName().size() > 0)
                return new ValidationRequest(certificateInterest,
                        new ConfigPolicyManager.OnCertificateDownloadCompleteForInterest (this, interest,
                                stepCount, onVerified, onValidationFailed,
                                wireFormat), new ConfigPolicyManager.OnVerifyInterestFailedWrapper (
                                onValidationFailed, interest), 2, stepCount + 1);
            else {
                // For interests, we must check that the timestamp is fresh enough.
                // This is done after (possibly) downloading the certificate to avoid filling
                // the cache with bad keys.
                Name signatureName = net.named_data.jndn.KeyLocator.getFromSignature(signature)
                        .getKeyName();
                Name keyName = net.named_data.jndn.security.certificate.IdentityCertificate
                        .certificateNameToPublicKeyName(signatureName);
                double timestamp = interest.getName().get(-4).toNumber();

                if (!interestTimestampIsFresh(keyName, timestamp, failureReason)) {
                    try {
                        onValidationFailed.onInterestValidationFailed(interest,
                                failureReason[0]);
                    } catch (Exception ex_1) {
                        logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                                "Error in onInterestValidationFailed", ex_1);
                    }
                    return null;
                }

                // Certificate is known. Verify the signature.
                // wireEncode returns the cached encoding if available.
                if (verify(signature, interest.wireEncode(), failureReason)) {
                    try {
                        onVerified.onVerifiedInterest(interest);
                    } catch (Exception ex_2) {
                        logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE, "Error in onVerifiedInterest", ex_2);
                    }
                    updateTimestampForKey(keyName, timestamp);
                } else {
                    try {
                        onValidationFailed.onInterestValidationFailed(interest,
                                failureReason[0]);
                    } catch (Exception ex_3) {
                        logger_.log(ILOG.J2CsMapping.Util.Logging.Level.SEVERE,
                                "Error in onInterestValidationFailed", ex_3);
                    }
                }

                return null;
            }
        }

        public void extractEntriesForNackInterest(
				Interest interest, ArrayList<Entry> entries)
        {
            SignedBlob encoding = interest.wireEncode();

            // Go backwards through the list so we can remove entries.
            for (int i = table_.Count - 1; i >= 0; --i) {
                PendingInterestTable.Entry  pendingInterest = table_[i];
                if (pendingInterest.getOnNetworkNack() == null)
                    continue;

                // wireEncode returns the encoding cached when the interest was sent (if
                // it was the default wire encoding).
                if (pendingInterest.getInterest().wireEncode().equals(encoding)) {
                    ILOG.J2CsMapping.Collections.Collections.Add(entries,table_[i]);
                    // We let the callback from callLater call _processInterestTimeout, but
                    // for efficiency, mark this as removed so that it returns right away.
                    ILOG.J2CsMapping.Collections.Collections.RemoveAt(table_,i);
                    pendingInterest.setIsRemoved();
                }
            }
        }

        public void testRedecodeImplicitDigestExclude()
        {
            // Check that we encode and decode correctly with an implicit digest exclude.
            Interest interest = new Interest(new Name("/A"));
            interest.getExclude()
                    .appendComponent(
                            new Name(
                                    "/sha256digest="
                                            + "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f")
                                    .get(0));
            ArrayList dump = dumpInterest(interest);

            Blob encoding = interest.wireEncode();
            Interest reDecodedInterest = new Interest();
            try {
                reDecodedInterest.wireDecode(encoding);
            } catch (EncodingException ex) {
                Assert.Fail("Can't decode reDecodedInterest");
            }
            ArrayList redecodedDump = dumpInterest(reDecodedInterest);
            Assert.AssertTrue("Re-decoded interest does not match original",
                    interestDumpsEqual(dump, redecodedDump));
        }