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+/*
+* GOST 34.10-2001
+* (C) 2007 Falko Strenzke, FlexSecure GmbH
+* Manuel Hartl, FlexSecure GmbH
+* (C) 2008-2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_GOST_3410_KEY_H__
+#define BOTAN_GOST_3410_KEY_H__
+
+#include <botan/ecc_key.h>
+
+namespace Botan {
+
+/**
+* This class represents GOST_3410 Public Keys.
+*/
+class BOTAN_DLL GOST_3410_PublicKey : public virtual EC_PublicKey,
+ public PK_Verifying_wo_MR_Key
+ {
+ public:
+
+ /**
+ * Get this keys algorithm name.
+ * @result this keys algorithm name
+ */
+ std::string algo_name() const { return "GOST-34.10"; }
+
+ /**
+ * 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;
+
+ u32bit message_parts() const { return 2; }
+
+ u32bit message_part_size() const
+ { return mp_dom_pars->get_order().bytes(); }
+
+ /**
+ * Verify a message with this key.
+ * @param message the byte array containing the message
+ * @param mess_len the number of bytes in the message byte array
+ * @param signature the byte array containing the signature
+ * @param sig_len the number of bytes in the signature byte array
+ */
+ bool verify(const byte message[], u32bit mess_len,
+ const byte signature[], u32bit sig_len) const;
+
+ /**
+ * Default constructor. Use this one if you want to later fill
+ * this object with data from an encoded key.
+ */
+ GOST_3410_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
+ */
+ GOST_3410_PublicKey(const EC_Domain_Params& dom_par,
+ const PointGFp& public_point); // sets core
+
+ GOST_3410_PublicKey const& operator=(const GOST_3410_PublicKey& rhs);
+
+ GOST_3410_PublicKey(const GOST_3410_PublicKey& other);
+
+ /**
+ * Set the domain parameters of this key. This function has to be
+ * used when a key encoded without domain parameters was decoded into
+ * this key. Otherwise it will not be able to verify a signature.
+ * @param dom_pars the domain_parameters associated with this key
+ * @throw Invalid_Argument if the point was found not to be satisfying the
+ * curve equation of the provided domain parameters
+ * or if this key already has domain parameters set
+ * and these are differing from those given as the parameter
+ */
+ void set_domain_parameters(const EC_Domain_Params& dom_pars);
+
+ /**
+ * Ensure that the public point and domain parameters of this key are set.
+ * @throw Invalid_State if either of the two data members is not set
+ */
+ virtual void affirm_init() const;
+
+ /**
+ * Get an x509_encoder that can be used to encode this key.
+ * @result an x509_encoder for this key
+ */
+ X509_Encoder* x509_encoder() const;
+
+ /**
+ * Get an x509_decoder that can be used to decode a stored key into
+ * this key.
+ * @result an x509_decoder for this key
+ */
+ X509_Decoder* x509_decoder();
+
+ protected:
+ void X509_load_hook();
+ void set_all_values(const GOST_3410_PublicKey& other);
+ };
+
+/**
+* This class represents GOST_3410 Private Keys
+*/
+class BOTAN_DLL GOST_3410_PrivateKey : public GOST_3410_PublicKey,
+ public EC_PrivateKey,
+ public PK_Signing_Key
+ {
+ public:
+ /**
+ * Default constructor. Use this one if you want to later fill
+ * this object with data from an encoded key.
+ */
+ GOST_3410_PrivateKey() {}
+
+ /**
+ * Generate a new private key
+ * @param the domain parameters to used for this key
+ */
+ GOST_3410_PrivateKey(RandomNumberGenerator& rng,
+ const EC_Domain_Params& domain);
+
+ /**
+ * Load a private key
+ * @param domain parameters
+ * @param x the private key
+ */
+ GOST_3410_PrivateKey(const EC_Domain_Params& domain, const BigInt& x);
+
+ GOST_3410_PrivateKey(const GOST_3410_PrivateKey& other);
+ GOST_3410_PrivateKey const& operator=(const GOST_3410_PrivateKey& rhs);
+
+ /**
+ * Sign a message with this key.
+ * @param message the byte array representing the message to be signed
+ * @param mess_len the length of the message byte array
+ * @result the signature
+ */
+
+ SecureVector<byte> sign(const byte message[], u32bit mess_len,
+ RandomNumberGenerator& rng) const;
+
+ /**
+ * Make sure that the public key parts of this object are set
+ * (calls EC_PublicKey::affirm_init()) as well as the private key
+ * value.
+ * @throw Invalid_State if the above conditions are not satisfied
+ */
+ virtual void affirm_init() const;
+
+ private:
+ void set_all_values(const GOST_3410_PrivateKey& other);
+ void PKCS8_load_hook(bool = false);
+ };
+
+}
+
+#endif