GetGroup () for GOST curve

Gost.h

@@ -29,6 +29,7 @@ namespace crypto
 			~GOSTR3410Curve ();			
 
 			size_t GetKeyLen () const { return m_KeyLen; }; 
+			const EC_GROUP * GetGroup () const { return m_Group; };
 			EC_POINT * MulP (const BIGNUM * n) const;
 			bool GetXY (const EC_POINT * p, BIGNUM * x, BIGNUM * y) const;
 			EC_POINT * CreatePoint (const BIGNUM * x, const BIGNUM * y) const;