コード例 #1
0
ファイル: Interest.cs プロジェクト: named-data/ndn-dot-net
 /// <summary>
 /// Set this interest to use a copy of the given Exclude object.
 /// </summary>
 ///
 /// @note You can also call getExclude and change the exclude entries directly.
 /// <param name="exclude">size() 0.</param>
 /// <returns>This Interest so that you can chain calls to update values.</returns>
 public Interest setExclude(Exclude exclude)
 {
     exclude_.set((exclude == null) ? new Exclude() : new Exclude(exclude));
     ++changeCount_;
     return this;
 }
コード例 #2
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        private static void encodeExclude(Exclude exclude, TlvEncoder encoder)
        {
            int saveLength = encoder.getLength();

            // TODO: Do we want to order the components (except for ANY)?
            // Encode the entries backwards.
            for (int i = exclude.size() - 1; i >= 0; --i) {
                Exclude.Entry entry = exclude.get(i);

                if (entry.getType() == net.named_data.jndn.Exclude.Type.ANY)
                    encoder.writeTypeAndLength(net.named_data.jndn.encoding.tlv.Tlv.Any, 0);
                else
                    encodeNameComponent(entry.getComponent(), encoder);
            }

            encoder.writeTypeAndLength(net.named_data.jndn.encoding.tlv.Tlv.Exclude, encoder.getLength()
                    - saveLength);
        }
コード例 #3
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ファイル: Exclude.cs プロジェクト: named-data/ndn-dot-net
 /// <summary>
 /// Create a new Exclude as a copy of the given exclude.
 /// </summary>
 ///
 /// <param name="exclude">The Exclude to copy.</param>
 public Exclude(Exclude exclude)
 {
     this.changeCount_ = 0;
     // Each entry is read-only, so do a shallow copy.
     entries_ = new ArrayList<Entry>(exclude.entries_);
 }
コード例 #4
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ファイル: Interest.cs プロジェクト: redfood/ndn-dot-net
 /// <summary>
 /// Set this interest to use a copy of the given Exclude object.
 /// </summary>
 ///
 /// @note You can also call getExclude and change the exclude entries directly.
 /// <param name="exclude">size() 0.</param>
 /// <returns>This Interest so that you can chain calls to update values.</returns>
 public Interest setExclude(Exclude exclude)
 {
     exclude_.set((exclude == null) ? new Exclude() : new Exclude(exclude));
     ++changeCount_;
     return(this);
 }
コード例 #5
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        private static void decodeExclude(Exclude exclude, TlvDecoder decoder,
				bool copy)
        {
            int endOffset = decoder.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.Exclude);

            exclude.clear();
            while (decoder.getOffset() < endOffset) {
                if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.Any, endOffset)) {
                    // Read past the Any TLV.
                    decoder.readBooleanTlv(net.named_data.jndn.encoding.tlv.Tlv.Any, endOffset);
                    exclude.appendAny();
                } else
                    exclude.appendComponent(decodeNameComponent(decoder, copy));
            }

            decoder.finishNestedTlvs(endOffset);
        }
コード例 #6
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ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
        /// <summary>
        /// Set the Exclude object from the list of ExcludeEntry.
        /// </summary>
        ///
        /// <param name="exclude">The Exclude object to update.</param>
        /// <param name="entries">The list of ExcludeEntry.</param>
        private static void setExcludeEntries(Exclude exclude, ArrayList entries)
        {
            exclude.clear();

            for (int i = 0; i < entries.Count; ++i) {
                Producer.ExcludeEntry  entry = (Producer.ExcludeEntry ) entries[i];

                if (i == 0 && entry.component_.getValue().size() == 0
                        && entry.anyFollowsComponent_)
                    // This is a "beginning ANY".
                    exclude.appendAny();
                else {
                    exclude.appendComponent(entry.component_);
                    if (entry.anyFollowsComponent_)
                        exclude.appendAny();
                }
            }
        }
コード例 #7
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 /// <summary>
 /// Create a new Exclude as a copy of the given exclude.
 /// </summary>
 ///
 /// <param name="exclude">The Exclude to copy.</param>
 public Exclude(Exclude exclude)
 {
     this.changeCount_ = 0;
     // Each entry is read-only, so do a shallow copy.
     entries_ = new ArrayList <Entry>(exclude.entries_);
 }
コード例 #8
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ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
        /// <summary>
        /// Exclude all components in the range beginning at "from" and ending at "to".
        /// </summary>
        ///
        /// <param name="exclude">The Exclude object to update.</param>
        /// <param name="from">The first component in the exclude range.</param>
        /// <param name="to">The last component in the exclude range.</param>
        private static void excludeRange(Exclude exclude, Name.Component from,
				Name.Component to)
        {
            if (from.compare(to) >= 0) {
                if (from.compare(to) == 0)
                    throw new Exception(
                            "excludeRange: from == to. To exclude a single component, sue excludeOne.");
                else
                    throw new Exception(
                            "excludeRange: from must be less than to. Invalid range: ["
                                    + from.toEscapedString() + ", "
                                    + to.toEscapedString() + "]");
            }

            ArrayList entries = getExcludeEntries(exclude);

            int iNewFrom;
            int iFoundFrom = findEntryBeforeOrAt(entries, from);
            if (iFoundFrom < 0) {
                // There is no entry before "from" so insert at the beginning.
                entries.Insert(0, new Producer.ExcludeEntry (from, true));
                iNewFrom = 0;
            } else {
                Producer.ExcludeEntry  foundFrom = (Producer.ExcludeEntry ) entries[iFoundFrom];

                if (!foundFrom.anyFollowsComponent_) {
                    if (foundFrom.component_.equals(from)) {
                        // There is already an entry with "from", so just set the "ANY" flag.
                        foundFrom.anyFollowsComponent_ = true;
                        iNewFrom = iFoundFrom;
                    } else {
                        // Insert following the entry before "from".
                        entries.Insert(iFoundFrom + 1, new Producer.ExcludeEntry (from, true));
                        iNewFrom = iFoundFrom + 1;
                    }
                } else
                    // The entry before "from" already has an "ANY" flag, so do nothing.
                    iNewFrom = iFoundFrom;
            }

            // We have at least one "from" before "to", so we know this will find an entry.
            int iFoundTo = findEntryBeforeOrAt(entries, to);
            Producer.ExcludeEntry  foundTo = (Producer.ExcludeEntry ) entries[iFoundTo];
            if (iFoundTo == iNewFrom)
                // Insert the "to" immediately after the "from".
                entries.Insert(iNewFrom + 1, new Producer.ExcludeEntry (to, false));
            else {
                int iRemoveEnd;
                if (!foundTo.anyFollowsComponent_) {
                    if (foundTo.component_.equals(to))
                        // The "to" entry already exists. Remove up to it.
                        iRemoveEnd = iFoundTo;
                    else {
                        // Insert following the previous entry, which will be removed.
                        entries.Insert(iFoundTo + 1, new Producer.ExcludeEntry (to, false));
                        iRemoveEnd = iFoundTo + 1;
                    }
                } else
                    // "to" follows a component which is already followed by "ANY", meaning
                    // the new range now encompasses it, so remove the component.
                    iRemoveEnd = iFoundTo + 1;

                // Remove intermediate entries since they are inside the range.
                int iRemoveBegin = iNewFrom + 1;
                int nRemoveNeeded = iRemoveEnd - iRemoveBegin;
                for (int i = 0; i < nRemoveNeeded; ++i)
                    ILOG.J2CsMapping.Collections.Collections.RemoveAt(entries,iRemoveBegin);
            }

            setExcludeEntries(exclude, entries);
        }
コード例 #9
0
ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
        /// <summary>
        /// Create a list of ExcludeEntry from the Exclude object.
        /// </summary>
        ///
        /// <param name="exclude">The Exclude object to read.</param>
        /// <returns>A new list of ExcludeEntry.</returns>
        private static ArrayList getExcludeEntries(Exclude exclude)
        {
            ArrayList entries = new ArrayList();

            for (int i = 0; i < exclude.size(); ++i) {
                if (exclude.get(i).getType() == net.named_data.jndn.Exclude.Type.ANY) {
                    if (entries.Count == 0)
                        // Add a "beginning ANY".
                        ILOG.J2CsMapping.Collections.Collections.Add(entries,new Producer.ExcludeEntry (new Name.Component(), true));
                    else
                        // Set anyFollowsComponent of the final component.
                        ((Producer.ExcludeEntry ) entries[entries.Count - 1]).anyFollowsComponent_ = true;
                } else
                    ILOG.J2CsMapping.Collections.Collections.Add(entries,new Producer.ExcludeEntry (exclude.get(i).getComponent(),
                                            false));
            }

            return entries;
        }
コード例 #10
0
ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
 /// <summary>
 /// Exclude all components in the range ending at "to".
 /// </summary>
 ///
 /// <param name="exclude">The Exclude object to update.</param>
 /// <param name="to">The last component in the exclude range.</param>
 private static void excludeBefore(Exclude exclude, Name.Component to)
 {
     excludeRange(exclude, new Name.Component(), to);
 }
コード例 #11
0
ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
        /// <summary>
        /// Exclude all components in the range beginning at "from".
        /// </summary>
        ///
        /// <param name="exclude">The Exclude object to update.</param>
        /// <param name="from">The first component in the exclude range.</param>
        private static void excludeAfter(Exclude exclude, Name.Component from)
        {
            ArrayList entries = getExcludeEntries(exclude);

            int iNewFrom;
            int iFoundFrom = findEntryBeforeOrAt(entries, from);
            if (iFoundFrom < 0) {
                // There is no entry before "from" so insert at the beginning.
                entries.Insert(0, new Producer.ExcludeEntry (from, true));
                iNewFrom = 0;
            } else {
                Producer.ExcludeEntry  foundFrom = (Producer.ExcludeEntry ) entries[iFoundFrom];

                if (!foundFrom.anyFollowsComponent_) {
                    if (foundFrom.component_.equals(from)) {
                        // There is already an entry with "from", so just set the "ANY" flag.
                        foundFrom.anyFollowsComponent_ = true;
                        iNewFrom = iFoundFrom;
                    } else {
                        // Insert following the entry before "from".
                        entries.Insert(iFoundFrom + 1, new Producer.ExcludeEntry (from, true));
                        iNewFrom = iFoundFrom + 1;
                    }
                } else
                    // The entry before "from" already has an "ANY" flag, so do nothing.
                    iNewFrom = iFoundFrom;
            }

            // Remove entries after the new "from".
            int iRemoveBegin = iNewFrom + 1;
            int nRemoveNeeded = entries.Count - iRemoveBegin;
            for (int i = 0; i < nRemoveNeeded; ++i)
                ILOG.J2CsMapping.Collections.Collections.RemoveAt(entries,iRemoveBegin);

            setExcludeEntries(exclude, entries);
        }
コード例 #12
0
ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
        /// <summary>
        /// This is called from an expressInterest OnData to check that the encryption
        /// key contained in data fits the timeSlot. This sends a refined interest if
        /// required.
        /// </summary>
        ///
        /// <param name="interest">The interest given to expressInterest.</param>
        /// <param name="data">The fetched Data packet.</param>
        /// <param name="timeSlot_0">The time slot as milliseconds since Jan 1, 1970 UTC.</param>
        /// <param name="onEncryptedKeys_1">encrypted content key Data packets. If onEncryptedKeys is null, this does not use it.</param>
        internal void handleCoveringKey(Interest interest, Data data,
				double timeSlot_0, Producer.OnEncryptedKeys  onEncryptedKeys_1, net.named_data.jndn.encrypt.EncryptError.OnError  onError_2)
        {
            double timeCount = Math.Round(timeSlot_0,MidpointRounding.AwayFromZero);
            Producer.KeyRequest  keyRequest = (Producer.KeyRequest ) ILOG.J2CsMapping.Collections.Collections.Get(keyRequests_,timeCount);

            Name interestName = interest.getName();
            Name keyName = data.getName();

            double begin = net.named_data.jndn.encrypt.Schedule.fromIsoString(keyName
                    .get(START_TIME_STAMP_INDEX).getValue().toString());
            double end = net.named_data.jndn.encrypt.Schedule.fromIsoString(keyName.get(END_TIME_STAMP_INDEX)
                    .getValue().toString());

            if (timeSlot_0 >= end) {
                // If the received E-KEY covers some earlier period, try to retrieve an
                // E-KEY covering a later one.
                Exclude timeRange = new Exclude(interest.getExclude());
                excludeBefore(timeRange, keyName.get(START_TIME_STAMP_INDEX));
                ILOG.J2CsMapping.Collections.Collections.Put(keyRequest.repeatAttempts,interestName,0);

                sendKeyInterest(new Interest(interestName).setExclude(timeRange)
                        .setChildSelector(1), timeSlot_0, onEncryptedKeys_1, onError_2);
            } else {
                // If the received E-KEY covers the content key, encrypt the content.
                Blob encryptionKey = data.getContent();
                // If everything is correct, save the E-KEY as the current key.
                if (encryptContentKey(encryptionKey, keyName, timeSlot_0,
                        onEncryptedKeys_1, onError_2)) {
                    Producer.KeyInfo  keyInfo = (Producer.KeyInfo ) ILOG.J2CsMapping.Collections.Collections.Get(eKeyInfo_,interestName);
                    keyInfo.beginTimeSlot = begin;
                    keyInfo.endTimeSlot = end;
                    keyInfo.keyBits = encryptionKey;
                }
            }
        }
コード例 #13
0
ファイル: Producer.cs プロジェクト: named-data/ndn-dot-net
        /// <summary>
        /// Create the content key corresponding to the timeSlot. This first checks if
        /// the content key exists. For an existing content key, this returns the
        /// content key name directly. If the key does not exist, this creates one and
        /// encrypts it using the corresponding E-KEYs. The encrypted content keys are
        /// passed to the onEncryptedKeys callback.
        /// </summary>
        ///
        /// <param name="timeSlot_0">The time slot as milliseconds since Jan 1, 1970 UTC.</param>
        /// <param name="onEncryptedKeys_1">content key Data packets. If onEncryptedKeys is null, this does not use it. 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="onError_2">better error handling the callback should catch and properly handle any exceptions.</param>
        /// <returns>The content key name.</returns>
        public Name createContentKey(double timeSlot_0,
				Producer.OnEncryptedKeys  onEncryptedKeys_1, net.named_data.jndn.encrypt.EncryptError.OnError  onError_2)
        {
            double hourSlot = getRoundedTimeSlot(timeSlot_0);

            // Create the content key name.
            Name contentKeyName = new Name(namespace_);
            contentKeyName.append(net.named_data.jndn.encrypt.algo.Encryptor.NAME_COMPONENT_C_KEY);
            contentKeyName.append(net.named_data.jndn.encrypt.Schedule.toIsoString(hourSlot));

            Blob contentKeyBits;

            // Check if we have created the content key before.
            if (database_.hasContentKey(timeSlot_0))
                // We have created the content key. Return its name directly.
                return contentKeyName;

            // We haven't created the content key. Create one and add it into the database.
            AesKeyParams aesParams = new AesKeyParams(128);
            contentKeyBits = net.named_data.jndn.encrypt.algo.AesAlgorithm.generateKey(aesParams).getKeyBits();
            database_.addContentKey(timeSlot_0, contentKeyBits);

            // Now we need to retrieve the E-KEYs for content key encryption.
            double timeCount = Math.Round(timeSlot_0,MidpointRounding.AwayFromZero);
            ILOG.J2CsMapping.Collections.Collections.Put(keyRequests_,timeCount,new Producer.KeyRequest (eKeyInfo_.Count));
            Producer.KeyRequest  keyRequest = (Producer.KeyRequest ) ILOG.J2CsMapping.Collections.Collections.Get(keyRequests_,timeCount);

            // Check if the current E-KEYs can cover the content key.
            Exclude timeRange = new Exclude();
            excludeAfter(timeRange,
                    new Name.Component(net.named_data.jndn.encrypt.Schedule.toIsoString(timeSlot_0)));
            new ILOG.J2CsMapping.Collections.IteratorAdapter(eKeyInfo_.GetEnumerator());
            for (IIterator i = new ILOG.J2CsMapping.Collections.IteratorAdapter(eKeyInfo_.GetEnumerator()); i.HasNext();) {
                // For each current E-KEY.
                DictionaryEntry entry = (DictionaryEntry) i.Next();
                Producer.KeyInfo  keyInfo = (Producer.KeyInfo ) ((DictionaryEntry) entry).Value;
                if (timeSlot_0 < keyInfo.beginTimeSlot
                        || timeSlot_0 >= keyInfo.endTimeSlot) {
                    // The current E-KEY cannot cover the content key, so retrieve one.
                    ILOG.J2CsMapping.Collections.Collections.Put(keyRequest.repeatAttempts,((DictionaryEntry) entry).Key,0);
                    sendKeyInterest(
                            new Interest((Name) ((DictionaryEntry) entry).Key).setExclude(
                                    timeRange).setChildSelector(1), timeSlot_0,
                            onEncryptedKeys_1, onError_2);
                } else {
                    // The current E-KEY can cover the content key.
                    // Encrypt the content key directly.
                    Name eKeyName = new Name((Name) ((DictionaryEntry) entry).Key);
                    eKeyName.append(net.named_data.jndn.encrypt.Schedule.toIsoString(keyInfo.beginTimeSlot));
                    eKeyName.append(net.named_data.jndn.encrypt.Schedule.toIsoString(keyInfo.endTimeSlot));
                    encryptContentKey(keyInfo.keyBits, eKeyName, timeSlot_0,
                            onEncryptedKeys_1, onError_2);
                }
            }

            return contentKeyName;
        }
コード例 #14
0
        public void testExcludeMatches()
        {
            Exclude exclude = new Exclude();
            exclude.appendComponent(new Name("%00%02").get(0));
            exclude.appendAny();
            exclude.appendComponent(new Name("%00%20").get(0));

            Name.Component component;
            component = new Name("%00%01").get(0);
            Assert.AssertFalse(component.toEscapedString() + " should not match "
                    + exclude.toUri(), exclude.matches(component));
            component = new Name("%00%0F").get(0);
            Assert.AssertTrue(
                    component.toEscapedString() + " should match "
                            + exclude.toUri(), exclude.matches(component));
            component = new Name("%00%21").get(0);
            Assert.AssertFalse(component.toEscapedString() + " should not match "
                    + exclude.toUri(), exclude.matches(component));
        }