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authorlloyd <[email protected]>2010-03-02 05:08:15 +0000
committerlloyd <[email protected]>2010-03-02 05:08:15 +0000
commit3c15bd259f0921f1fa08ec91ee3cf2621c64a02d (patch)
tree54351d5e865a872896c6a95175693cc0ffa9e246 /src/pubkey/ecdh/ecdh.h
parent5fec937bd0c72858d6cf2f09b58b219294c7d5cc (diff)
parent54a3c5ae67f8b987d05ffd18e2d49a2da1d5988e (diff)
propagate from branch 'net.randombit.botan' (head fc86fc4842254088bf820ea6ebf05877aa63fb22)
to branch 'net.randombit.botan.c++0x' (head 77565ff7252df7f8faad86d65075498b0adb93d8)
Diffstat (limited to 'src/pubkey/ecdh/ecdh.h')
-rw-r--r--src/pubkey/ecdh/ecdh.h102
1 files changed, 102 insertions, 0 deletions
diff --git a/src/pubkey/ecdh/ecdh.h b/src/pubkey/ecdh/ecdh.h
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+/*
+* ECDH
+* (C) 2007 Falko Strenzke, FlexSecure GmbH
+* Manuel Hartl, FlexSecure GmbH
+* (C) 2008-2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ECDH_KEY_H__
+#define BOTAN_ECDH_KEY_H__
+
+#include <botan/ecc_key.h>
+
+namespace Botan {
+
+/**
+* This class represents ECDH Public Keys.
+*/
+class BOTAN_DLL ECDH_PublicKey : public virtual EC_PublicKey
+ {
+ public:
+
+ /**
+ * Default constructor. Use this one if you want to later fill
+ * this object with data from an encoded key.
+ */
+ ECDH_PublicKey() {}
+
+ /**
+ * Construct a public key from a given public point.
+ * @param dom_par the domain parameters associated with this key
+ * @param public_point the public point defining this key
+ */
+ ECDH_PublicKey(const EC_Domain_Params& dom_par,
+ const PointGFp& public_point) :
+ EC_PublicKey(dom_par, public_point) {}
+
+ /**
+ * Get this keys algorithm name.
+ * @result this keys algorithm name
+ */
+ std::string algo_name() const { return "ECDH"; }
+
+ /**
+ * Get the maximum number of bits allowed to be fed to this key.
+ * This is the bitlength of the order of the base point.
+
+ * @result the maximum number of input bits
+ */
+ u32bit max_input_bits() const { return domain().get_order().bits(); }
+ };
+
+/**
+* This class represents ECDH Private Keys.
+*/
+class BOTAN_DLL ECDH_PrivateKey : public ECDH_PublicKey,
+ public EC_PrivateKey,
+ public PK_Key_Agreement_Key
+ {
+ public:
+
+ /**
+ * Default constructor. Use this one if you want to later fill
+ * this object with data from an encoded key.
+ */
+ ECDH_PrivateKey() {}
+
+ /**
+ * Generate a new private key
+ * @param the domain parameters to used for this key
+ */
+ ECDH_PrivateKey(RandomNumberGenerator& rng,
+ const EC_Domain_Params& domain) :
+ EC_PrivateKey(rng, domain) {}
+
+ MemoryVector<byte> public_value() const
+ { return EC2OSP(public_point(), PointGFp::UNCOMPRESSED); }
+
+ /**
+ * Derive a shared key with the other parties public key.
+ * @param key the other partys public key
+ * @param key_len the other partys public key
+ */
+ SecureVector<byte> derive_key(const byte key[], u32bit key_len) const;
+
+ /**
+ * Derive a shared key with the other parties public key.
+ * @param other the other partys public key
+ */
+ SecureVector<byte> derive_key(const ECDH_PublicKey& other) const;
+
+ /**
+ * Derive a shared key with the other parties public key.
+ * @param point the public point of the other parties key
+ */
+ SecureVector<byte> derive_key(const PointGFp& point) const;
+ };
+
+}
+
+#endif