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/*
* ECDSA
* (C) 2007 Falko Strenzke, FlexSecure GmbH
* (C) 2008-2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ECDSA_SIGNATURE_H__
#define BOTAN_ECDSA_SIGNATURE_H__
#include <botan/bigint.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
namespace Botan {
class BOTAN_DLL ECDSA_Signature
{
public:
friend class ECDSA_Signature_Decoder;
ECDSA_Signature() {}
ECDSA_Signature(const BigInt& r, const BigInt& s);
ECDSA_Signature(const ECDSA_Signature& other);
ECDSA_Signature& operator=(const ECDSA_Signature& other);
const BigInt& get_r() const { return m_r; }
const BigInt& get_s() const { return m_s; }
/**
* return the r||s
*/
SecureVector<byte> get_concatenation() const;
private:
BigInt m_r;
BigInt m_s;
};
/* Equality of ECDSA_Signature */
bool operator==(const ECDSA_Signature& lhs, const ECDSA_Signature& rhs);
inline bool operator!=(const ECDSA_Signature& lhs, const ECDSA_Signature& rhs)
{
return !(lhs == rhs);
}
class BOTAN_DLL ECDSA_Signature_Decoder
{
public:
void signature_bits(const MemoryRegion<byte>& bits)
{
BER_Decoder(bits)
.start_cons(SEQUENCE)
.decode(m_signature->m_r)
.decode(m_signature->m_s)
.verify_end()
.end_cons();
}
ECDSA_Signature_Decoder(ECDSA_Signature* signature) :
m_signature(signature)
{}
private:
ECDSA_Signature* m_signature;
};
class BOTAN_DLL ECDSA_Signature_Encoder
{
public:
MemoryVector<byte> signature_bits() const
{
return DER_Encoder()
.start_cons(SEQUENCE)
.encode(m_signature->get_r())
.encode(m_signature->get_s())
.end_cons()
.get_contents();
}
ECDSA_Signature_Encoder(const ECDSA_Signature* signature) :
m_signature(signature)
{}
private:
const ECDSA_Signature* m_signature;
};
ECDSA_Signature decode_seq(const MemoryRegion<byte>& seq);
ECDSA_Signature decode_concatenation(const MemoryRegion<byte>& concatenation);
}
#endif
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