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wallet2: workaround for lightwallet before supporting subaddress (followup #2656)

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kenshi84 2017-10-16 12:03:09 +09:00
parent 8d511f3c24
commit ac4018a7e6
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GPG Key ID: 085D092F1F43D51A
1 changed files with 21 additions and 5 deletions
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26
src/wallet/wallet2.cpp
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@ -5325,11 +5325,27 @@ bool wallet2::light_wallet_key_image_is_ours(const crypto::key_image& key_image,
crypto::key_image calculated_key_image;
cryptonote::keypair in_ephemeral;
// Subaddresses aren't supported in mymonero/openmonero yet. Using empty values.
const std::vector<crypto::public_key> additional_tx_pub_keys;
const crypto::public_key pkey = crypto::null_pkey;
cryptonote::generate_key_image_helper(get_account().get_keys(), m_subaddresses, pkey, tx_public_key, additional_tx_pub_keys, out_index, in_ephemeral, calculated_key_image);
// Subaddresses aren't supported in mymonero/openmonero yet. Roll out the original scheme:
// compute D = a*R
// compute P = Hs(D || i)*G + B
// compute x = Hs(D || i) + b (and check if P==x*G)
// compute I = x*Hp(P)
const account_keys& ack = get_account().get_keys();
crypto::key_derivation derivation;
bool r = crypto::generate_key_derivation(tx_public_key, ack.m_view_secret_key, derivation);
CHECK_AND_ASSERT_MES(r, false, "failed to generate_key_derivation(" << tx_public_key << ", " << ack.m_view_secret_key << ")");
r = crypto::derive_public_key(derivation, out_index, ack.m_account_address.m_spend_public_key, in_ephemeral.pub);
CHECK_AND_ASSERT_MES(r, false, "failed to derive_public_key (" << derivation << ", " << out_index << ", " << ack.m_account_address.m_spend_public_key << ")");
crypto::derive_secret_key(derivation, out_index, ack.m_spend_secret_key, in_ephemeral.sec);
crypto::public_key out_pkey_test;
r = crypto::secret_key_to_public_key(in_ephemeral.sec, out_pkey_test);
CHECK_AND_ASSERT_MES(r, false, "failed to secret_key_to_public_key(" << in_ephemeral.sec << ")");
CHECK_AND_ASSERT_MES(in_ephemeral.pub == out_pkey_test, false, "derived secret key doesn't match derived public key");
crypto::generate_key_image(in_ephemeral.pub, in_ephemeral.sec, calculated_key_image);
index_keyimage_map.emplace(out_index, calculated_key_image);
m_key_image_cache.emplace(tx_public_key, index_keyimage_map);
return key_image == calculated_key_image;