mirror of
https://git.wownero.com/wownero/wownero.git
synced 2024-08-15 01:03:23 +00:00
145 lines
6.4 KiB
C++
145 lines
6.4 KiB
C++
// Copyright (c) 2016, Monero Research Labs
|
|
//
|
|
// Author: Shen Noether <shen.noether@gmx.com>
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other
|
|
// materials provided with the distribution.
|
|
//
|
|
// 3. Neither the name of the copyright holder nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without specific
|
|
// prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#pragma once
|
|
|
|
//#define DBG
|
|
|
|
#ifndef RCTSIGS_H
|
|
#define RCTSIGS_H
|
|
|
|
#include <cstddef>
|
|
#include <mutex>
|
|
#include <vector>
|
|
#include <tuple>
|
|
|
|
#include "crypto/generic-ops.h"
|
|
|
|
extern "C" {
|
|
#include "crypto/random.h"
|
|
#include "crypto/keccak.h"
|
|
}
|
|
#include "crypto/crypto.h"
|
|
|
|
|
|
#include "rctTypes.h"
|
|
#include "rctOps.h"
|
|
|
|
//Define this flag when debugging to get additional info on the console
|
|
#ifdef DBG
|
|
#define DP(x) dp(x)
|
|
#else
|
|
#define DP(x)
|
|
#endif
|
|
|
|
|
|
|
|
using namespace std;
|
|
using namespace crypto;
|
|
|
|
namespace rct {
|
|
|
|
//Schnorr Non-linkable
|
|
//Gen Gives a signature (L1, s1, s2) proving that the sender knows "x" such that xG = one of P1 or P2
|
|
//Ver Verifies that signer knows an "x" such that xG = one of P1 or P2
|
|
//These are called in the below ASNL sig generation
|
|
void GenSchnorrNonLinkable(key & L1, key & s1, key & s2, const key & x, const key & P1, const key & P2, int index);
|
|
bool VerSchnorrNonLinkable(const key & P1, const key & P2, const key & L1, const key & s1, const key & s2);
|
|
|
|
//Aggregate Schnorr Non-linkable Ring Signature (ASNL)
|
|
// c.f. http://eprint.iacr.org/2015/1098 section 5.
|
|
// These are used in range proofs (alternatively Borromean could be used)
|
|
// Gen gives a signature which proves the signer knows, for each i,
|
|
// an x[i] such that x[i]G = one of P1[i] or P2[i]
|
|
// Ver Verifies the signer knows a key for one of P1[i], P2[i] at each i
|
|
asnlSig GenASNL(key64 x, key64 P1, key64 P2, bits indices);
|
|
bool VerASNL(const key64 P1, const key64 P2, const asnlSig &as);
|
|
|
|
//Multilayered Spontaneous Anonymous Group Signatures (MLSAG signatures)
|
|
//These are aka MG signatutes in earlier drafts of the ring ct paper
|
|
// c.f. http://eprint.iacr.org/2015/1098 section 2.
|
|
// keyImageV just does I[i] = xx[i] * HashToPoint(xx[i] * G) for each i
|
|
// Gen creates a signature which proves that for some column in the keymatrix "pk"
|
|
// the signer knows a secret key for each row in that column
|
|
// Ver verifies that the MG sig was created correctly
|
|
keyV keyImageV(const keyV &xx);
|
|
mgSig MLSAG_Gen(key message, const keyM & pk, const keyV & xx, const unsigned int index);
|
|
bool MLSAG_Ver(key message, const keyM &pk, const mgSig &sig);
|
|
//mgSig MLSAG_Gen_Old(const keyM & pk, const keyV & xx, const int index);
|
|
|
|
//proveRange and verRange
|
|
//proveRange gives C, and mask such that \sumCi = C
|
|
// c.f. http://eprint.iacr.org/2015/1098 section 5.1
|
|
// and Ci is a commitment to either 0 or 2^i, i=0,...,63
|
|
// thus this proves that "amount" is in [0, 2^64]
|
|
// mask is a such that C = aG + bH, and b = amount
|
|
//verRange verifies that \sum Ci = C and that each Ci is a commitment to 0 or 2^i
|
|
rangeSig proveRange(key & C, key & mask, const xmr_amount & amount);
|
|
bool verRange(const key & C, const rangeSig & as);
|
|
|
|
//Ring-ct MG sigs
|
|
//Prove:
|
|
// c.f. http://eprint.iacr.org/2015/1098 section 4. definition 10.
|
|
// This does the MG sig on the "dest" part of the given key matrix, and
|
|
// the last row is the sum of input commitments from that column - sum output commitments
|
|
// this shows that sum inputs = sum outputs
|
|
//Ver:
|
|
// verifies the above sig is created corretly
|
|
mgSig proveRctMG(const ctkeyM & pubs, const ctkeyV & inSk, const keyV &outMasks, const ctkeyV & outPk, unsigned int index);
|
|
bool verRctMG(mgSig mg, const ctkeyM & pubs, const ctkeyV & outPk);
|
|
|
|
//These functions get keys from blockchain
|
|
//replace these when connecting blockchain
|
|
//getKeyFromBlockchain grabs a key from the blockchain at "reference_index" to mix with
|
|
//populateFromBlockchain creates a keymatrix with "mixin" columns and one of the columns is inPk
|
|
// the return value are the key matrix, and the index where inPk was put (random).
|
|
void getKeyFromBlockchain(ctkey & a, size_t reference_index);
|
|
tuple<ctkeyM, xmr_amount> populateFromBlockchain(ctkeyV inPk, int mixin);
|
|
|
|
//RingCT protocol
|
|
//genRct:
|
|
// creates an rctSig with all data necessary to verify the rangeProofs and that the signer owns one of the
|
|
// columns that are claimed as inputs, and that the sum of inputs = sum of outputs.
|
|
// Also contains masked "amount" and "mask" so the receiver can see how much they received
|
|
//verRct:
|
|
// verifies that all signatures (rangeProogs, MG sig, sum inputs = outputs) are correct
|
|
//decodeRct: (c.f. http://eprint.iacr.org/2015/1098 section 5.1.1)
|
|
// uses the attached ecdh info to find the amounts represented by each output commitment
|
|
// must know the destination private key to find the correct amount, else will return a random number
|
|
rctSig genRct(ctkeyV & inSk, ctkeyV & inPk, const keyV & destinations, const vector<xmr_amount> amounts, const int mixin);
|
|
bool verRct(rctSig & rv);
|
|
xmr_amount decodeRct(rctSig & rv, key & sk, unsigned int i);
|
|
|
|
|
|
|
|
}
|
|
#endif /* RCTSIGS_H */
|
|
|