CoinRequest Class Reference

#include <bank.h>

Inheritance diagram for CoinRequest:

Collaboration diagram for CoinRequest:

Public Member Functions
	CoinRequest (BIO *bio)
	CoinRequest (PublicBank &bank)
	~CoinRequest ()
BIGNUM *	Unblind (BIGNUM *bnSignedCoin, PublicBank &bank)
void	ProcessResponse (Coin *pCoin, PublicBank &bank, BIGNUM *bnSignedCoinRequest)
void	WriteBIO (BIO *bio)
void	ReadBIO (BIO *bio)
void	Dump ()
Public Member Functions inherited from PublicCoinRequest
	PublicCoinRequest ()
	PublicCoinRequest (BIO *bio)
	~PublicCoinRequest ()
BIGNUM *	Request ()
void	WriteBIO (BIO *bio)
void	ReadBIO (BIO *bio)
void	Dump ()

Additional Inherited Members
Protected Attributes inherited from PublicCoinRequest
BIGNUM *	m_bnCoinRequest

Detailed Description

Definition at line 249 of file bank.h.

Constructor & Destructor Documentation

CoinRequest::CoinRequest ( BIO *  bio )

inline

Definition at line 262 of file bank.h.

    {
    m_ctx=NULL;
    ReadBIO(bio);
    }

CoinRequest::CoinRequest ( PublicBank &  bank )

inline

Definition at line 267 of file bank.h.

    {
    m_ctx=NULL;

    BIGNUM *y=BN_new();
    for( ; ; )
        {
        m_coin.Random(bank.CoinLength());

        m_coin.GenerateCoinNumber(y,bank);

        if(BN_cmp(y,bank.p()) < 0)
        break;
        }

    // choose b
    m_bnBlindingFactor=BN_new();
    BN_rand(m_bnBlindingFactor,BLINDING_LENGTH*8,0,0);
    DumpNumber("b=        ",m_bnBlindingFactor);

    // calculate A->B: y g^b
    m_bnCoinRequest=BN_new();
    CheckCTX();

    BN_mod_exp(m_bnCoinRequest,bank.g(),m_bnBlindingFactor,bank.p(),m_ctx);
    BN_mod_mul(m_bnCoinRequest,m_bnCoinRequest,y,bank.p(),m_ctx);
    DumpNumber("A->B=     ",m_bnCoinRequest);

    BN_free(y);
    }

CoinRequest::~CoinRequest ( )

inline

Definition at line 297 of file bank.h.

    {
    BN_free(m_bnBlindingFactor);
    BN_CTX_free(m_ctx);
    }

Member Function Documentation

void CoinRequest::Dump ( )

inline

Definition at line 321 of file bank.h.

    {
    PublicCoinRequest::Dump();
    m_coin.Dump();
    DumpNumber("blinding= ",m_bnBlindingFactor);
    }

void CoinRequest::ProcessResponse ( Coin *  pCoin, PublicBank &  bank, BIGNUM *  bnSignedCoinRequest  )

inline

Definition at line 311 of file bank.h.

    {
    BIGNUM *bnCoinSignature=Unblind(bnSignedCoinRequest,bank);
    DumpNumber("z=        ",bnCoinSignature);
    pCoin->Set(m_coin,bnCoinSignature);
    }

void CoinRequest::ReadBIO

(

BIO *

bio

)

BIGNUM* CoinRequest::Unblind ( BIGNUM *  bnSignedCoin, PublicBank &  bank  )

inline

Definition at line 302 of file bank.h.

    {
    CheckCTX();
    BIGNUM *z=BN_new();
    BN_mod_exp(z,bank.pub_key(),m_bnBlindingFactor,bank.p(),m_ctx);
    BN_mod_inverse(z,z,bank.p(),m_ctx);
    BN_mod_mul(z,bnSignedCoin,z,bank.p(),m_ctx);
    return z;
    }

void CoinRequest::WriteBIO

(

BIO *

bio

)

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The documentation for this class was generated from the following file:

• /usr/local/src/opentxs/deps/lucre/include/lucre/bank.h