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Rangeproof commits to scriptpubkey

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This commit is contained in:
Gregory Sanders 2017-02-09 11:35:00 -05:00
parent 74cb1f5cab
commit 714e8fc0d0
4 changed files with 9 additions and 8 deletions
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4
src/blind.cpp
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@ -57,7 +57,7 @@ bool UnblindOutput(const CKey &key, const CTxOut& txout, CAmount& amount_out, ui
return false;
if (secp256k1_pedersen_commitment_parse(secp256k1_blind_context, &commit, &txout.nValue.vchCommitment[0]) != 1)
return false;
int res = secp256k1_rangeproof_rewind(secp256k1_blind_context, blinding_factor_out.begin(), &amount, msg, &msg_size, nonce.begin(), &min_value, &max_value, &commit, &txout.nValue.vchRangeproof[0], txout.nValue.vchRangeproof.size(), NULL, 0, &gen);
int res = secp256k1_rangeproof_rewind(secp256k1_blind_context, blinding_factor_out.begin(), &amount, msg, &msg_size, nonce.begin(), &min_value, &max_value, &commit, &txout.nValue.vchRangeproof[0], txout.nValue.vchRangeproof.size(), txout.scriptPubKey.size() ? &txout.scriptPubKey.front() : NULL, txout.scriptPubKey.size(), &gen);
secp256k1_generator recoveredGen;
if (!res || amount > (uint64_t)MAX_MONEY || !MoneyRange((CAmount)amount) || msg_size != 64 || secp256k1_generator_generate_blinded(secp256k1_blind_context, &recoveredGen, msg+32, msg+64) != 1 || !memcmp(&gen, &recoveredGen, 33)) {
@ -237,7 +237,7 @@ bool BlindOutputs(std::vector<uint256 >& input_blinding_factors, const std::vect
memcpy(assetsMessage+32, assetblindptrs[assetblindptrs.size()-1], 32);
// Sign rangeproof
int res = secp256k1_rangeproof_sign(secp256k1_blind_context, &value.vchRangeproof[0], &nRangeProofLen, 0, &commit, blindptrs.back(), nonce.begin(), std::min(std::max((int)GetArg("-ct_exponent", 0), -1),18), std::min(std::max((int)GetArg("-ct_bits", 32), 1), 51), amount, assetsMessage, sizeof(assetsMessage), NULL, 0, &gen);
int res = secp256k1_rangeproof_sign(secp256k1_blind_context, &value.vchRangeproof[0], &nRangeProofLen, 0, &commit, blindptrs.back(), nonce.begin(), std::min(std::max((int)GetArg("-ct_exponent", 0), -1),18), std::min(std::max((int)GetArg("-ct_bits", 32), 1), 51), amount, assetsMessage, sizeof(assetsMessage), out.scriptPubKey.size() ? &out.scriptPubKey.front() : NULL, out.scriptPubKey.size(), &gen);
value.vchRangeproof.resize(nRangeProofLen);
// TODO: do something smarter here
assert(res);