diff options
Diffstat (limited to 'src/device/device_default.cpp')
| -rw-r--r-- | src/device/device_default.cpp | 55 |
1 files changed, 51 insertions, 4 deletions
diff --git a/src/device/device_default.cpp b/src/device/device_default.cpp index cb2f4e266..999fbc22f 100644 --- a/src/device/device_default.cpp +++ b/src/device/device_default.cpp @@ -1,4 +1,4 @@ -// Copyright (c) 2017-2018, The Monero Project +// Copyright (c) 2017-2019, The Monero Project // // All rights reserved. // @@ -34,8 +34,10 @@ #include "int-util.h" #include "cryptonote_basic/account.h" #include "cryptonote_basic/subaddress_index.h" +#include "cryptonote_core/cryptonote_tx_utils.h" #include "ringct/rctOps.h" +#include "log.hpp" #define ENCRYPTED_PAYMENT_ID_TAIL 0x8d #define CHACHA8_KEY_TAIL 0x8c @@ -278,10 +280,55 @@ namespace hw { return true; } + bool device_default::generate_output_ephemeral_keys(const size_t tx_version, + const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key, + const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index, + const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys, + std::vector<crypto::public_key> &additional_tx_public_keys, + std::vector<rct::key> &amount_keys, crypto::public_key &out_eph_public_key) { - bool device_default::add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index, - const rct::key &amount_key, const crypto::public_key &out_eph_public_key) { - return true; + crypto::key_derivation derivation; + + // make additional tx pubkey if necessary + cryptonote::keypair additional_txkey; + if (need_additional_txkeys) + { + additional_txkey.sec = additional_tx_keys[output_index]; + if (dst_entr.is_subaddress) + additional_txkey.pub = rct::rct2pk(rct::scalarmultKey(rct::pk2rct(dst_entr.addr.m_spend_public_key), rct::sk2rct(additional_txkey.sec))); + else + additional_txkey.pub = rct::rct2pk(rct::scalarmultBase(rct::sk2rct(additional_txkey.sec))); + } + + bool r; + if (change_addr && dst_entr.addr == *change_addr) + { + // sending change to yourself; derivation = a*R + r = generate_key_derivation(txkey_pub, sender_account_keys.m_view_secret_key, derivation); + CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to generate_key_derivation(" << txkey_pub << ", " << sender_account_keys.m_view_secret_key << ")"); + } + else + { + // sending to the recipient; derivation = r*A (or s*C in the subaddress scheme) + r = generate_key_derivation(dst_entr.addr.m_view_public_key, dst_entr.is_subaddress && need_additional_txkeys ? additional_txkey.sec : tx_key, derivation); + CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to generate_key_derivation(" << dst_entr.addr.m_view_public_key << ", " << (dst_entr.is_subaddress && need_additional_txkeys ? additional_txkey.sec : tx_key) << ")"); + } + + if (need_additional_txkeys) + { + additional_tx_public_keys.push_back(additional_txkey.pub); + } + + if (tx_version > 1) + { + crypto::secret_key scalar1; + derivation_to_scalar(derivation, output_index, scalar1); + amount_keys.push_back(rct::sk2rct(scalar1)); + } + r = derive_public_key(derivation, output_index, dst_entr.addr.m_spend_public_key, out_eph_public_key); + CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to derive_public_key(" << derivation << ", " << output_index << ", "<< dst_entr.addr.m_spend_public_key << ")"); + + return r; } bool device_default::encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) { |