Exemplo n.º 1
0
        /// <summary>
        /// Append a timestamp component and a random nonce component to interest's
        /// name. This ensures that the timestamp is greater than the timestamp used in
        /// the previous call.
        /// </summary>
        ///
        /// <param name="interest">The interest whose name is append with components.</param>
        /// <param name="wireFormat">A WireFormat object used to encode the SignatureInfo.</param>
        public void prepareCommandInterestName(Interest interest,
                                               WireFormat wireFormat)
        {
            double timestamp;

            lock (lastUsedTimestampLock_) {
                // nowOffsetMilliseconds_ is only used for testing.
                double now = net.named_data.jndn.util.Common.getNowMilliseconds() + nowOffsetMilliseconds_;
                timestamp = Math.Round(now, MidpointRounding.AwayFromZero);
                while (timestamp <= lastUsedTimestamp_)
                {
                    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.
                lastUsedTimestamp_ = 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));
        }
Exemplo n.º 2
0
        /// <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);
            }
        }