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support old BP

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This commit is contained in:
wowario
2019-03-09 10:46:03 +03:00
parent 48eeca2077
commit d99c27e24d
14 changed files with 1567 additions and 49 deletions
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30
src/cryptonote_basic/cryptonote_format_utils.cpp
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@@ -180,7 +180,7 @@ namespace cryptonote
if (!base_only)
{
const bool bulletproof = rct::is_rct_bulletproof(rv.type);
if (bulletproof)
if (rct::is_rct_new_bulletproof(rv.type))
{
if (rv.p.bulletproofs.size() != 1)
{
@@ -193,7 +193,7 @@ namespace cryptonote
return false;
}
const size_t max_outputs = 1 << (rv.p.bulletproofs[0].L.size() - 6);
if (max_outputs < tx.vout.size())
if (max_outputs < tx.vout.size() && rv.type == rct::RCTTypeBulletproof)
{
LOG_PRINT_L1("Failed to parse transaction from blob, bad bulletproofs max outputs in tx " << get_transaction_hash(tx));
return false;
@@ -204,6 +204,26 @@ namespace cryptonote
for (size_t i = 0; i < n_amounts; ++i)
rv.p.bulletproofs[0].V[i] = rct::scalarmultKey(rv.outPk[i].mask, rct::INV_EIGHT);
}
else if (bulletproof)
{
if (rct::n_bulletproof_v1_amounts(rv.p.bulletproofs) != tx.vout.size())
{
LOG_PRINT_L1("Failed to parse transaction from blob, bad bulletproofs size in tx " << get_transaction_hash(tx));
return false;
}
size_t idx = 0;
for (size_t n = 0; n < rv.outPk.size(); ++n)
{
//rv.p.bulletproofs[n].V.resize(1);
//rv.p.bulletproofs[n].V[0] = rv.outPk[n].mask;
CHECK_AND_ASSERT_MES(rv.p.bulletproofs[n].L.size() >= 6, false, "Bad bulletproofs L size"); // at least 64 bits
const size_t n_amounts = rct::n_bulletproof_v1_amounts(rv.p.bulletproofs[n]);
CHECK_AND_ASSERT_MES(idx + n_amounts <= rv.outPk.size(), false, "Internal error filling out V");
rv.p.bulletproofs[n].V.resize(n_amounts);
for (size_t i = 0; i < n_amounts; ++i)
rv.p.bulletproofs[n].V[i] = rv.outPk[idx++].mask;
}
}
}
}
return true;
@@ -426,6 +446,12 @@ namespace cryptonote
const rct::rctSig &rv = tx.rct_signatures;
if (!rct::is_rct_bulletproof(rv.type))
return blob_size;
const size_t n_outputs = tx.vout.size();
if (n_outputs <= 2)
return blob_size;
if (rct::is_rct_old_bulletproof(rv.type))
return blob_size;
const uint64_t bp_base = 368;
const size_t n_padded_outputs = rct::n_bulletproof_max_amounts(rv.p.bulletproofs);
uint64_t bp_clawback = get_transaction_weight_clawback(tx, n_padded_outputs);
CHECK_AND_ASSERT_THROW_MES_L1(bp_clawback <= std::numeric_limits<uint64_t>::max() - blob_size, "Weight overflow");