key-locator: KeyDigest
refs #1426
Change-Id: Ib4de0c7348786879775e52c803f6a2eaeaa2100c
diff --git a/src/encoding/tlv.hpp b/src/encoding/tlv.hpp
index ecd9453..7f8169d 100644
--- a/src/encoding/tlv.hpp
+++ b/src/encoding/tlv.hpp
@@ -71,7 +71,7 @@
FinalBlockId = 26,
SignatureType = 27,
KeyLocator = 28,
- KeyLocatorDigest = 29,
+ KeyDigest = 29,
AppPrivateBlock1 = 128,
AppPrivateBlock2 = 32767
diff --git a/src/key-locator.cpp b/src/key-locator.cpp
new file mode 100644
index 0000000..ba17771
--- /dev/null
+++ b/src/key-locator.cpp
@@ -0,0 +1,185 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "key-locator.hpp"
+#include "encoding/block-helpers.hpp"
+
+namespace ndn {
+
+KeyLocator::KeyLocator()
+ : m_type(KeyLocator_None)
+{
+}
+
+KeyLocator::KeyLocator(const Block& wire)
+{
+ wireDecode(wire);
+}
+
+KeyLocator::KeyLocator(const Name& name)
+{
+ setName(name);
+}
+
+template<bool T>
+size_t
+KeyLocator::wireEncode(EncodingImpl<T>& block) const
+{
+ // KeyLocator ::= KEY-LOCATOR-TYPE TLV-LENGTH (Name | KeyDigest)
+ // KeyDigest ::= KEY-DIGEST-TYPE TLV-LENGTH BYTE+
+
+ size_t totalLength = 0;
+
+ switch (m_type) {
+ case KeyLocator_None:
+ break;
+ case KeyLocator_Name:
+ totalLength += m_name.wireEncode(block);
+ break;
+ case KeyLocator_KeyDigest:
+ totalLength += block.prependBlock(m_keyDigest);
+ break;
+ default:
+ throw Error("Unsupported KeyLocator type");
+ }
+
+ totalLength += block.prependVarNumber(totalLength);
+ totalLength += block.prependVarNumber(tlv::KeyLocator);
+ return totalLength;
+}
+
+template size_t
+KeyLocator::wireEncode<true>(EncodingImpl<true>& estimator) const;
+
+template size_t
+KeyLocator::wireEncode<false>(EncodingImpl<false>& encoder) const;
+
+const Block&
+KeyLocator::wireEncode() const
+{
+ if (m_wire.hasWire())
+ return m_wire;
+
+ EncodingEstimator estimator;
+ size_t estimatedSize = wireEncode(estimator);
+
+ EncodingBuffer buffer(estimatedSize, 0);
+ wireEncode(buffer);
+
+ m_wire = buffer.block();
+ return m_wire;
+}
+
+void
+KeyLocator::wireDecode(const Block& wire)
+{
+ if (wire.type() != tlv::KeyLocator)
+ throw Error("Unexpected TLV type during KeyLocator decoding");
+
+ m_wire = wire;
+ m_wire.parse();
+
+ if (m_wire.elements().empty()) {
+ m_type = KeyLocator_None;
+ return;
+ }
+
+ switch (m_wire.elements_begin()->type()) {
+ case tlv::Name:
+ m_type = KeyLocator_Name;
+ m_name.wireDecode(*m_wire.elements_begin());
+ break;
+ case tlv::KeyDigest:
+ m_type = KeyLocator_KeyDigest;
+ m_keyDigest = *m_wire.elements_begin();
+ break;
+ default:
+ m_type = KeyLocator_Unknown;
+ break;
+ }
+}
+
+KeyLocator&
+KeyLocator::clear()
+{
+ m_wire.reset();
+ m_type = KeyLocator_None;
+ m_name.clear();
+ m_keyDigest.reset();
+ return *this;
+}
+
+const Name&
+KeyLocator::getName() const
+{
+ if (m_type != KeyLocator_Name)
+ throw Error("KeyLocator type is not Name");
+
+ return m_name;
+}
+
+KeyLocator&
+KeyLocator::setName(const Name& name)
+{
+ this->clear();
+ m_type = KeyLocator_Name;
+ m_name = name;
+ return *this;
+}
+
+const Block&
+KeyLocator::getKeyDigest() const
+{
+ if (m_type != KeyLocator_KeyDigest)
+ throw Error("KeyLocator type is not KeyDigest");
+
+ return m_keyDigest;
+}
+
+KeyLocator&
+KeyLocator::setKeyDigest(const Block& keyDigest)
+{
+ if (keyDigest.type() != tlv::KeyDigest)
+ throw Error("expecting KeyDigest block");
+
+ this->clear();
+ m_type = KeyLocator_KeyDigest;
+ m_keyDigest = keyDigest;
+ return *this;
+}
+
+KeyLocator&
+KeyLocator::setKeyDigest(const ConstBufferPtr& keyDigest)
+{
+ // WARNING: ConstBufferPtr is shared_ptr<const Buffer>
+ // This function takes a constant reference of a shared pointer.
+ // It MUST NOT change the reference count of that shared pointer.
+
+ return this->setKeyDigest(dataBlock(tlv::KeyDigest, keyDigest->get(), keyDigest->size()));
+}
+
+bool
+KeyLocator::operator==(const KeyLocator& other) const
+{
+ return wireEncode() == other.wireEncode();
+}
+
+} // namespace ndn
diff --git a/src/key-locator.hpp b/src/key-locator.hpp
index a86275d..2528912 100644
--- a/src/key-locator.hpp
+++ b/src/key-locator.hpp
@@ -22,9 +22,7 @@
#ifndef NDN_KEY_LOCATOR_HPP
#define NDN_KEY_LOCATOR_HPP
-#include "encoding/block.hpp"
#include "encoding/encoding-buffer.hpp"
-
#include "name.hpp"
namespace ndn {
@@ -42,174 +40,128 @@
}
};
- enum {
- KeyLocator_None = 65535, // just an arbitrarily large number (used only internally)
+ enum Type {
+ /** \brief indicates KeyLocator is empty (internal use only)
+ */
+ KeyLocator_None = 65535,
+ /** \brief indicates KeyLocator contains a Name
+ */
KeyLocator_Name = 0,
-
+ /** \brief indicates KeyLocator contains a KeyDigest
+ */
+ KeyLocator_KeyDigest = 1,
+ /** \brief indicates KeyLocator contains an unknown element
+ */
KeyLocator_Unknown = 255
};
- KeyLocator()
- : m_type(KeyLocator_None)
- {
- }
+public: // constructors
+ /** \brief construct an empty KeyLocator
+ */
+ KeyLocator();
- KeyLocator(const Name& name)
- {
- setName(name);
- }
-
- /**
- * @brief Create from wire encoding
+ /** \brief construct from wire encoding
*/
explicit
- KeyLocator(const Block& wire)
- {
- wireDecode(wire);
- }
+ KeyLocator(const Block& wire);
- ///////////////////////////////////////////////////////////////////////////////
+ /** \brief construct from Name
+ * \note implicit conversion is permitted
+ */
+ KeyLocator(const Name& name);
+public: // encode and decode
+ /** \brief prepend wire encoding
+ * \param block EncodingBuffer or Estimator
+ */
template<bool T>
size_t
wireEncode(EncodingImpl<T>& block) const;
+ /** \return wire encoding
+ */
const Block&
wireEncode() const;
+ /** \brief decode from wire encoding
+ * \throw Error outer TLV type is not KeyLocator
+ * \note No error is thrown for unrecognized inner TLV, but type becomes KeyLocator_Unknown.
+ */
void
wireDecode(const Block& wire);
- ///////////////////////////////////////////////////////////////////////////////
-
+public: // attributes
bool
empty() const
{
return m_type == KeyLocator_None;
}
- uint32_t
- getType() const { return m_type; }
+ Type
+ getType() const
+ {
+ return m_type;
+ }
- ////////////////////////////////////////////////////////
- // Helper methods for different types of key locators
- //
- // For now only Name type is actually supported
+ /** \brief clear KeyLocator
+ * \details type becomes KeyLocator_None
+ * \return self
+ */
+ KeyLocator&
+ clear();
+ /** \brief get Name element
+ * \throw Error if type is not KeyLocator_Name
+ */
const Name&
getName() const;
- void
+ /** \brief set Name element
+ * \details type becomes KeyLocator_Name
+ * \return self
+ */
+ KeyLocator&
setName(const Name& name);
+ /** \brief get KeyDigest element
+ * \throw Error if type is not KeyLocator_KeyDigest
+ */
+ const Block&
+ getKeyDigest() const;
+
+ /** \brief set KeyDigest element
+ * \details type becomes KeyLocator_KeyDigest
+ * \throw Error if Block type is not KeyDigest
+ * \return self
+ */
+ KeyLocator&
+ setKeyDigest(const Block& keyDigest);
+
+ /** \brief set KeyDigest value
+ * \details type becomes KeyLocator_KeyDigest
+ * \return self
+ */
+ KeyLocator&
+ setKeyDigest(const ConstBufferPtr& keyDigest);
+
public: // EqualityComparable concept
bool
operator==(const KeyLocator& other) const;
bool
- operator!=(const KeyLocator& other) const;
+ operator!=(const KeyLocator& other) const
+ {
+ return !this->operator==(other);
+ }
private:
- uint32_t m_type;
+ Type m_type;
Name m_name;
+ Block m_keyDigest;
mutable Block m_wire;
};
-template<bool T>
-inline size_t
-KeyLocator::wireEncode(EncodingImpl<T>& block) const
-{
- // KeyLocator ::= KEY-LOCATOR-TYPE TLV-LENGTH KeyLocatorValue
-
- // KeyLocatorValue ::= Name |
- // KeyLocatorDigest | (not supported yet)
- // ...
-
- // KeyLocatorDigest ::= KEY-LOCATOR-DIGEST-TYPE TLV-LENGTH BYTE+
-
- size_t totalLength = 0;
-
- switch (m_type) {
- case KeyLocator_None:
- break;
- case KeyLocator_Name:
- totalLength += m_name.wireEncode(block);
- break;
- default:
- throw Error("Unsupported KeyLocator type");
- }
-
- totalLength += block.prependVarNumber(totalLength);
- totalLength += block.prependVarNumber(tlv::KeyLocator);
- return totalLength;
-}
-
-inline const Block&
-KeyLocator::wireEncode() const
-{
- if (m_wire.hasWire())
- return m_wire;
-
- EncodingEstimator estimator;
- size_t estimatedSize = wireEncode(estimator);
-
- EncodingBuffer buffer(estimatedSize, 0);
- wireEncode(buffer);
-
- m_wire = buffer.block();
- return m_wire;
-}
-
-inline void
-KeyLocator::wireDecode(const Block& value)
-{
- if (value.type() != tlv::KeyLocator)
- throw Error("Unexpected TLV type during KeyLocator decoding");
-
- m_wire = value;
- m_wire.parse();
-
- if (!m_wire.elements().empty() && m_wire.elements_begin()->type() == tlv::Name)
- {
- m_type = KeyLocator_Name;
- m_name.wireDecode(*m_wire.elements_begin());
- }
- else
- {
- m_type = KeyLocator_Unknown;
- }
-}
-
-inline const Name&
-KeyLocator::getName() const
-{
- if (m_type != KeyLocator_Name)
- throw Error("Requested Name, but KeyLocator is not of the Name type");
-
- return m_name;
-}
-
-inline void
-KeyLocator::setName(const Name& name)
-{
- m_wire.reset();
- m_type = KeyLocator_Name;
- m_name = name;
-}
-
-inline bool
-KeyLocator::operator==(const KeyLocator& other) const
-{
- return wireEncode() == other.wireEncode();
-}
-
-inline bool
-KeyLocator::operator!=(const KeyLocator& other) const
-{
- return !this->operator==(other);
-}
-
} // namespace ndn
-#endif
+#endif // NDN_KEY_LOCATOR_HPP