1 files changed, 148 insertions, 0 deletions
diff --git a/lib/pubkey/ec_group/ec_group.h b/lib/pubkey/ec_group/ec_group.h
new file mode 100644
index 000000000..80859bd71
--- /dev/null
+++ b/lib/pubkey/ec_group/ec_group.h
@@ -0,0 +1,148 @@
+/*
+* ECC Domain Parameters
+*
+* (C) 2007 Falko Strenzke, FlexSecure GmbH
+*     2008-2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ECC_DOMAIN_PARAMETERS_H__
+#define BOTAN_ECC_DOMAIN_PARAMETERS_H__
+
+#include <botan/point_gfp.h>
+#include <botan/curve_gfp.h>
+#include <botan/asn1_oid.h>
+
+namespace Botan {
+
+/**
+* This class represents elliptic curce domain parameters
+*/
+enum EC_Group_Encoding {
+   EC_DOMPAR_ENC_EXPLICIT = 0,
+   EC_DOMPAR_ENC_IMPLICITCA = 1,
+   EC_DOMPAR_ENC_OID = 2
+};
+
+/**
+* Class representing an elliptic curve
+*/
+class BOTAN_DLL EC_Group
+   {
+   public:
+
+      /**
+      * Construct Domain paramers from specified parameters
+      * @param curve elliptic curve
+      * @param base_point a base point
+      * @param order the order of the base point
+      * @param cofactor the cofactor
+      */
+      EC_Group(const CurveGFp& curve,
+               const PointGFp& base_point,
+               const BigInt& order,
+               const BigInt& cofactor) :
+         curve(curve),
+         base_point(base_point),
+         order(order),
+         cofactor(cofactor),
+         oid("")
+         {}
+
+      /**
+      * Decode a BER encoded ECC domain parameter set
+      * @param ber_encoding the bytes of the BER encoding
+      */
+      EC_Group(const std::vector<byte>& ber_encoding);
+
+      /**
+      * Create an EC domain by OID (or throw if unknown)
+      * @param oid the OID of the EC domain to create
+      */
+      EC_Group(const OID& oid);
+
+      /**
+      * Create an EC domain from PEM encoding (as from PEM_encode), or
+      * from an OID name (eg "secp256r1", or "1.2.840.10045.3.1.7")
+      * @param pem_or_oid PEM-encoded data, or an OID
+      */
+      EC_Group(const std::string& pem_or_oid = "");
+
+      /**
+      * Create the DER encoding of this domain
+      * @param form of encoding to use
+      * @returns bytes encododed as DER
+      */
+      std::vector<byte> DER_encode(EC_Group_Encoding form) const;
+
+      /**
+      * Return the PEM encoding (always in explicit form)
+      * @return string containing PEM data
+      */
+      std::string PEM_encode() const;
+
+      /**
+      * Return domain parameter curve
+      * @result domain parameter curve
+      */
+      const CurveGFp& get_curve() const { return curve; }
+
+      /**
+      * Return domain parameter curve
+      * @result domain parameter curve
+      */
+      const PointGFp& get_base_point() const { return base_point; }
+
+      /**
+      * Return the order of the base point
+      * @result order of the base point
+      */
+      const BigInt& get_order() const { return order; }
+
+      /**
+      * Return the cofactor
+      * @result the cofactor
+      */
+      const BigInt& get_cofactor() const { return cofactor; }
+
+      bool initialized() const { return !base_point.is_zero(); }
+
+      /**
+      * Return the OID of these domain parameters
+      * @result the OID
+      */
+      std::string get_oid() const { return oid; }
+
+      bool operator==(const EC_Group& other) const
+         {
+         return ((get_curve() == other.get_curve()) &&
+                 (get_base_point() == other.get_base_point()) &&
+                 (get_order() == other.get_order()) &&
+                 (get_cofactor() == other.get_cofactor()));
+         }
+
+      /**
+      * Return PEM representation of named EC group
+      */
+      static const char* PEM_for_named_group(const std::string& name);
+
+   private:
+      CurveGFp curve;
+      PointGFp base_point;
+      BigInt order, cofactor;
+      std::string oid;
+   };
+
+inline bool operator!=(const EC_Group& lhs,
+                       const EC_Group& rhs)
+   {
+   return !(lhs == rhs);
+   }
+
+// For compatability with 1.8
+typedef EC_Group EC_Domain_Params;
+
+}
+
+#endif