Add Deterministic DSA and ECDSA Signatures (Issue 121)

Based on Douglas Roark PR 131

1 files changed, 30 insertions, 1 deletions

diff --git a/eccrypto.h b/eccrypto.h
index c5049f13..ebfda2a8 100644
--- a/eccrypto.h
+++ b/eccrypto.h
@@ -1,4 +1,5 @@
 // eccrypto.h - written and placed in the public domain by Wei Dai

+//              deterministic signatures added by by Douglas Roark

 

 //! \file eccrypto.h

 //! \brief Classes and functions for Elliptic Curves over prime and binary fields

@@ -343,6 +344,16 @@ public:
   CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECDSA";}

 };

 

+//! \class DL_Algorithm_ECDSA_RFC6979

+//! \brief Elliptic Curve DSA (ECDSA) signature algorithm

+//! \tparam EC elliptic curve field

+template <class EC, class H>

+class DL_Algorithm_ECDSA_RFC6979 : public DL_Algorithm_DSA_RFC6979<typename EC::Point, H>

+{

+public:

+  CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECDSA-RFC6979";}

+};

+

 //! \class DL_Algorithm_ECNR

 //! \brief Elliptic Curve NR (ECNR) signature algorithm

 //! \tparam EC elliptic curve field

@@ -363,6 +374,23 @@ struct ECDSA : public DL_SS<DL_Keys_ECDSA<EC>, DL_Algorithm_ECDSA<EC>, DL_Signat
 {

 };

 

+//! \class ECDSA_RFC6979

+//! \brief Elliptic Curve DSA (ECDSA) deterministic signature scheme

+//! \tparam EC elliptic curve field

+//! \tparam H HashTransformation derived class

+//! \sa <a href="http://tools.ietf.org/rfc/rfc6979.txt">Deterministic Usage of the

+//!   Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA)</a>

+template <class EC, class H>

+struct ECDSA_RFC6979 : public DL_SS<

+	DL_Keys_ECDSA<EC>,

+	DL_Algorithm_ECDSA_RFC6979<EC, H>,

+	DL_SignatureMessageEncodingMethod_DSA,

+	H,

+	ECDSA_RFC6979<EC,H> >

+{

+	static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string("ECDSA-RFC6979/") + H::StaticAlgorithmName();}

+};

+

 //! \class ECNR

 //! \brief Elliptic Curve NR (ECNR) signature scheme

 //! \tparam EC elliptic curve field

@@ -415,7 +443,8 @@ struct ECIES
 		DL_EncryptionAlgorithm_Xor<HMAC<HASH>, DHAES_MODE, LABEL_OCTETS>,

 		ECIES<EC> >

 {

-	static std::string CRYPTOPP_API StaticAlgorithmName() {return "ECIES";}	// TODO: fix this after name is standardized

+	// TODO: fix this after name is standardized

+	CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "ECIES";}

 };

 

 NAMESPACE_END