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rct: make the amount key derivable by a third party with the tx key

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Scheme design from luigi1114.
This commit is contained in:
moneromooo-monero 2016-07-24 17:53:34 +01:00
parent cf33e1a52a
commit 9b70856ccb
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GPG key ID: 686F07454D6CEFC3
12 changed files with 141 additions and 93 deletions
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8
tests/core_tests/rct.cpp
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@ -125,13 +125,11 @@ bool gen_rct_tx_validation_base::generate_with(std::vector<test_event_entry>& ev
crypto::public_key tx_pub_key = get_tx_pub_key_from_extra(rct_txes[n]);
for (size_t o = 0; o < 4; ++o)
{
cryptonote::keypair in_ephemeral;
crypto::key_image ki;
cryptonote::generate_key_image_helper(miner_accounts[n].get_keys(), tx_pub_key, o, in_ephemeral, ki);
rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(tx_pub_key), rct::sk2rct(miner_accounts[n].get_keys().m_view_secret_key)));
if (rct_txes[n].rct_signatures.simple)
rct::decodeRctSimple(rct_txes[n].rct_signatures, rct::sk2rct(in_ephemeral.sec), o, rct_tx_masks[o+n*4]);
rct::decodeRctSimpleFromSharedSecret(rct_txes[n].rct_signatures, amount_key, o, rct_tx_masks[o+n*4]);
else
rct::decodeRct(rct_txes[n].rct_signatures, rct::sk2rct(in_ephemeral.sec), o, rct_tx_masks[o+n*4]);
rct::decodeRctFromSharedSecret(rct_txes[n].rct_signatures, amount_key, o, rct_tx_masks[o+n*4]);
}
CHECK_AND_ASSERT_MES(generator.construct_block_manually(blk_txes[n], blk_last, miner_account,