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/*************************************************
* ECDSA Header File *
* (C) 2007 Falko Strenzke, FlexSecure GmbH *
* (C) 2008 Jack Lloyd *
*************************************************/
#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 ECDSA_Signature_Decoder;
class ECDSA_Signature_Encoder;
class ECDSA_Signature
{
friend class ECDSA_Signature_Decoder;
friend class ECDSA_Signature_Encoder;
public:
ECDSA_Signature(const BigInt& r, const BigInt& s);
ECDSA_Signature()
{}
;
ECDSA_Signature(ECDSA_Signature const& other);
ECDSA_Signature const& operator=(ECDSA_Signature const& other);
BigInt const get_r() const
{
return m_r;
}
BigInt const get_s() const
{
return m_s;
}
/**
* return the r||s
*/
SecureVector<byte> const get_concatenation() const;
ECDSA_Signature_Encoder* x509_encoder() const;
ECDSA_Signature_Decoder* x509_decoder();
private:
BigInt m_r;
BigInt m_s;
};
bool operator== ( ECDSA_Signature const& lhs, ECDSA_Signature const& rhs );
inline bool operator!= ( ECDSA_Signature const& lhs, ECDSA_Signature const& rhs )
{
return !operator== ( lhs, rhs );
}
class 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 ECDSA_Signature_Encoder
{
public:
MemoryVector<byte> signature_bits() const
{
return DER_Encoder()
.start_cons(SEQUENCE)
.encode(m_signature->m_r)
.encode(m_signature->m_s)
.end_cons()
.get_contents();
}
ECDSA_Signature_Encoder(const ECDSA_Signature* signature) : m_signature(signature)
{}
private:
const ECDSA_Signature* m_signature;
};
ECDSA_Signature const decode_seq(MemoryRegion<byte> const& seq);
ECDSA_Signature const decode_concatenation(MemoryRegion<byte> const& concatenation);
}
#endif
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