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rct: rework serialization to avoid storing vector sizes

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moneromooo-monero 2016-09-14 20:23:06 +01:00
parent 0ce79ef10e
commit 7d413f635f
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GPG key ID: 686F07454D6CEFC3
6 changed files with 191 additions and 60 deletions
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34
src/cryptonote_core/cryptonote_format_utils.cpp
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@ -475,7 +475,7 @@ namespace cryptonote
tx.vin.clear();
tx.vout.clear();
tx.signatures.clear();
tx.rct_signatures = rct::rctSig();
tx.rct_signatures.type = rct::RCTTypeNull;
amount_keys.clear();
tx.version = rct ? 2 : 1;
@ -948,11 +948,35 @@ namespace cryptonote
// prefix
get_transaction_prefix_hash(t, hashes[0]);
// base rct data
get_blob_hash(t_serializable_object_to_blob((const rct::rctSigBase&)t.rct_signatures), hashes[1]);
transaction &tt = const_cast<transaction&>(t);
// prunable rct data
get_blob_hash(t_serializable_object_to_blob(t.rct_signatures.p), hashes[2]);
// base rct
{
std::stringstream ss;
binary_archive<true> ba(ss);
const size_t inputs = t.vin.size();
const size_t outputs = t.vout.size();
bool r = tt.rct_signatures.serialize_rctsig_base(ba, inputs, outputs);
CHECK_AND_ASSERT_MES(r, false, "Failed to serialize rct signatures base");
cryptonote::get_blob_hash(ss.str(), hashes[1]);
}
// prunable rct
if (t.rct_signatures.type == rct::RCTTypeNull)
{
hashes[2] = cryptonote::null_hash;
}
else
{
std::stringstream ss;
binary_archive<true> ba(ss);
const size_t inputs = t.vin.size();
const size_t outputs = t.vout.size();
const size_t mixin = t.vin.empty() ? 0 : t.vin[0].type() == typeid(txin_to_key) ? boost::get<txin_to_key>(t.vin[0]).key_offsets.size() - 1 : 0;
bool r = tt.rct_signatures.p.serialize_rctsig_prunable(ba, t.rct_signatures.type, inputs, outputs, mixin);
CHECK_AND_ASSERT_MES(r, false, "Failed to serialize rct signatures prunable");
cryptonote::get_blob_hash(ss.str(), hashes[2]);
}
// the tx hash is the hash of the 3 hashes
res = cn_fast_hash(hashes, sizeof(hashes));