diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cryptonote_config.h | 1 | ||||
| -rw-r--r-- | src/cryptonote_core/CMakeLists.txt | 4 | ||||
| -rw-r--r-- | src/cryptonote_core/blockchain.cpp | 81 | ||||
| -rw-r--r-- | src/cryptonote_core/blockchain.h | 22 | ||||
| -rw-r--r-- | src/cryptonote_core/tx_verification_utils.cpp | 167 | ||||
| -rw-r--r-- | src/cryptonote_core/tx_verification_utils.h | 78 | ||||
| -rw-r--r-- | src/ringct/rctSigs.cpp | 37 | ||||
| -rw-r--r-- | src/ringct/rctSigs.h | 1 | ||||
| -rw-r--r-- | src/ringct/rctTypes.h | 8 |
9 files changed, 288 insertions, 111 deletions
diff --git a/src/cryptonote_config.h b/src/cryptonote_config.h index 2ec194ef8..d37463af0 100644 --- a/src/cryptonote_config.h +++ b/src/cryptonote_config.h @@ -248,6 +248,7 @@ namespace config const unsigned char HASH_KEY_MM_SLOT = 'm'; const constexpr char HASH_KEY_MULTISIG_TX_PRIVKEYS_SEED[] = "multisig_tx_privkeys_seed"; const constexpr char HASH_KEY_MULTISIG_TX_PRIVKEYS[] = "multisig_tx_privkeys"; + const constexpr char HASH_KEY_TXHASH_AND_MIXRING[] = "txhash_and_mixring"; // Multisig const uint32_t MULTISIG_MAX_SIGNERS{16}; diff --git a/src/cryptonote_core/CMakeLists.txt b/src/cryptonote_core/CMakeLists.txt index 69411e379..beead6217 100644 --- a/src/cryptonote_core/CMakeLists.txt +++ b/src/cryptonote_core/CMakeLists.txt @@ -31,7 +31,9 @@ set(cryptonote_core_sources cryptonote_core.cpp tx_pool.cpp tx_sanity_check.cpp - cryptonote_tx_utils.cpp) + cryptonote_tx_utils.cpp + tx_verification_utils.cpp +) set(cryptonote_core_headers) diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp index 8edb33b5a..28d52a2d1 100644 --- a/src/cryptonote_core/blockchain.cpp +++ b/src/cryptonote_core/blockchain.cpp @@ -57,6 +57,7 @@ #include "common/notify.h" #include "common/varint.h" #include "common/pruning.h" +#include "common/data_cache.h" #include "time_helper.h" #undef MONERO_DEFAULT_LOG_CATEGORY @@ -98,7 +99,8 @@ Blockchain::Blockchain(tx_memory_pool& tx_pool) : m_difficulty_for_next_block(1), m_btc_valid(false), m_batch_success(true), - m_prepare_height(0) + m_prepare_height(0), + m_rct_ver_cache() { LOG_PRINT_L3("Blockchain::" << __func__); } @@ -3211,7 +3213,7 @@ bool Blockchain::have_tx_keyimges_as_spent(const transaction &tx) const } return false; } -bool Blockchain::expand_transaction_2(transaction &tx, const crypto::hash &tx_prefix_hash, const std::vector<std::vector<rct::ctkey>> &pubkeys) const +bool Blockchain::expand_transaction_2(transaction &tx, const crypto::hash &tx_prefix_hash, const std::vector<std::vector<rct::ctkey>> &pubkeys) { PERF_TIMER(expand_transaction_2); CHECK_AND_ASSERT_MES(tx.version == 2, false, "Transaction version is not 2"); @@ -3534,6 +3536,13 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc, false, "Transaction spends at least one output which is too young"); } + // Warn that new RCT types are present, and thus the cache is not being used effectively + static constexpr const std::uint8_t RCT_CACHE_TYPE = rct::RCTTypeBulletproofPlus; + if (tx.rct_signatures.type > RCT_CACHE_TYPE) + { + MWARNING("RCT cache is not caching new verification results. Please update RCT_CACHE_TYPE!"); + } + if (tx.version == 1) { if (threads > 1) @@ -3555,12 +3564,6 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc, } else { - if (!expand_transaction_2(tx, tx_prefix_hash, pubkeys)) - { - MERROR_VER("Failed to expand rct signatures!"); - return false; - } - // from version 2, check ringct signatures // obviously, the original and simple rct APIs use a mixRing that's indexes // in opposite orders, because it'd be too simple otherwise... @@ -3578,61 +3581,7 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc, case rct::RCTTypeCLSAG: case rct::RCTTypeBulletproofPlus: { - // check all this, either reconstructed (so should really pass), or not - { - if (pubkeys.size() != rv.mixRing.size()) - { - MERROR_VER("Failed to check ringct signatures: mismatched pubkeys/mixRing size"); - return false; - } - for (size_t i = 0; i < pubkeys.size(); ++i) - { - if (pubkeys[i].size() != rv.mixRing[i].size()) - { - MERROR_VER("Failed to check ringct signatures: mismatched pubkeys/mixRing size"); - return false; - } - } - - for (size_t n = 0; n < pubkeys.size(); ++n) - { - for (size_t m = 0; m < pubkeys[n].size(); ++m) - { - if (pubkeys[n][m].dest != rct::rct2pk(rv.mixRing[n][m].dest)) - { - MERROR_VER("Failed to check ringct signatures: mismatched pubkey at vin " << n << ", index " << m); - return false; - } - if (pubkeys[n][m].mask != rct::rct2pk(rv.mixRing[n][m].mask)) - { - MERROR_VER("Failed to check ringct signatures: mismatched commitment at vin " << n << ", index " << m); - return false; - } - } - } - } - - const size_t n_sigs = rct::is_rct_clsag(rv.type) ? rv.p.CLSAGs.size() : rv.p.MGs.size(); - if (n_sigs != tx.vin.size()) - { - MERROR_VER("Failed to check ringct signatures: mismatched MGs/vin sizes"); - return false; - } - for (size_t n = 0; n < tx.vin.size(); ++n) - { - bool error; - if (rct::is_rct_clsag(rv.type)) - error = memcmp(&boost::get<txin_to_key>(tx.vin[n]).k_image, &rv.p.CLSAGs[n].I, 32); - else - error = rv.p.MGs[n].II.empty() || memcmp(&boost::get<txin_to_key>(tx.vin[n]).k_image, &rv.p.MGs[n].II[0], 32); - if (error) - { - MERROR_VER("Failed to check ringct signatures: mismatched key image"); - return false; - } - } - - if (!rct::verRctNonSemanticsSimpleCached(rv)) + if (!ver_rct_non_semantics_simple_cached(tx, pubkeys, m_rct_ver_cache, RCT_CACHE_TYPE)) { MERROR_VER("Failed to check ringct signatures!"); return false; @@ -3641,6 +3590,12 @@ bool Blockchain::check_tx_inputs(transaction& tx, tx_verification_context &tvc, } case rct::RCTTypeFull: { + if (!expand_transaction_2(tx, tx_prefix_hash, pubkeys)) + { + MERROR_VER("Failed to expand rct signatures!"); + return false; + } + // check all this, either reconstructed (so should really pass), or not { bool size_matches = true; diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h index c61ce4466..42246fca2 100644 --- a/src/cryptonote_core/blockchain.h +++ b/src/cryptonote_core/blockchain.h @@ -57,6 +57,7 @@ #include "rpc/core_rpc_server_commands_defs.h" #include "cryptonote_basic/difficulty.h" #include "cryptonote_tx_utils.h" +#include "tx_verification_utils.h" #include "cryptonote_basic/verification_context.h" #include "crypto/hash.h" #include "checkpoints/checkpoints.h" @@ -597,6 +598,15 @@ namespace cryptonote bool store_blockchain(); /** + * @brief expands v2 transaction data from blockchain + * + * RingCT transactions do not transmit some of their data if it + * can be reconstituted by the receiver. This function expands + * that implicit data. + */ + static bool expand_transaction_2(transaction &tx, const crypto::hash &tx_prefix_hash, const std::vector<std::vector<rct::ctkey>> &pubkeys); + + /** * @brief validates a transaction's inputs * * validates a transaction's inputs as correctly used and not previously @@ -1222,6 +1232,9 @@ namespace cryptonote uint64_t m_prepare_nblocks; std::vector<block> *m_prepare_blocks; + // cache for verifying transaction RCT non semantics + mutable rct_ver_cache_t m_rct_ver_cache; + /** * @brief collects the keys for all outputs being "spent" as an input * @@ -1575,15 +1588,6 @@ namespace cryptonote void load_compiled_in_block_hashes(const GetCheckpointsCallback& get_checkpoints); /** - * @brief expands v2 transaction data from blockchain - * - * RingCT transactions do not transmit some of their data if it - * can be reconstituted by the receiver. This function expands - * that implicit data. - */ - bool expand_transaction_2(transaction &tx, const crypto::hash &tx_prefix_hash, const std::vector<std::vector<rct::ctkey>> &pubkeys) const; - - /** * @brief invalidates any cached block template */ void invalidate_block_template_cache(); diff --git a/src/cryptonote_core/tx_verification_utils.cpp b/src/cryptonote_core/tx_verification_utils.cpp new file mode 100644 index 000000000..a93ef2f25 --- /dev/null +++ b/src/cryptonote_core/tx_verification_utils.cpp @@ -0,0 +1,167 @@ +// Copyright (c) 2023, The Monero Project +// +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without modification, are +// permitted provided that the following conditions are met: +// +// 1. Redistributions of source code must retain the above copyright notice, this list of +// conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright notice, this list +// of conditions and the following disclaimer in the documentation and/or other +// materials provided with the distribution. +// +// 3. Neither the name of the copyright holder nor the names of its contributors may be +// used to endorse or promote products derived from this software without specific +// prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY +// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL +// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF +// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include "cryptonote_core/blockchain.h" +#include "cryptonote_core/tx_verification_utils.h" +#include "ringct/rctSigs.h" + +#undef MONERO_DEFAULT_LOG_CATEGORY +#define MONERO_DEFAULT_LOG_CATEGORY "blockchain" + +#define VER_ASSERT(cond, msgexpr) CHECK_AND_ASSERT_MES(cond, false, msgexpr) + +using namespace cryptonote; + +// Do RCT expansion, then do post-expansion sanity checks, then do full non-semantics verification. +static bool expand_tx_and_ver_rct_non_sem(transaction& tx, const rct::ctkeyM& mix_ring) +{ + // Pruned transactions can not be expanded and verified because they are missing RCT data + VER_ASSERT(!tx.pruned, "Pruned transaction will not pass verRctNonSemanticsSimple"); + + // Calculate prefix hash + const crypto::hash tx_prefix_hash = get_transaction_prefix_hash(tx); + + // Expand mixring, tx inputs, tx key images, prefix hash message, etc into the RCT sig + const bool exp_res = Blockchain::expand_transaction_2(tx, tx_prefix_hash, mix_ring); + VER_ASSERT(exp_res, "Failed to expand rct signatures!"); + + const rct::rctSig& rv = tx.rct_signatures; + + // Check that expanded RCT mixring == input mixring + VER_ASSERT(rv.mixRing == mix_ring, "Failed to check ringct signatures: mismatched pubkeys/mixRing"); + + // Check CLSAG/MLSAG size against transaction input + const size_t n_sigs = rct::is_rct_clsag(rv.type) ? rv.p.CLSAGs.size() : rv.p.MGs.size(); + VER_ASSERT(n_sigs == tx.vin.size(), "Failed to check ringct signatures: mismatched input sigs/vin sizes"); + + // For each input, check that the key images were copied into the expanded RCT sig correctly + for (size_t n = 0; n < n_sigs; ++n) + { + const crypto::key_image& nth_vin_image = boost::get<txin_to_key>(tx.vin[n]).k_image; + + if (rct::is_rct_clsag(rv.type)) + { + const bool ki_match = 0 == memcmp(&nth_vin_image, &rv.p.CLSAGs[n].I, 32); + VER_ASSERT(ki_match, "Failed to check ringct signatures: mismatched CLSAG key image"); + } + else + { + const bool mg_nonempty = !rv.p.MGs[n].II.empty(); + VER_ASSERT(mg_nonempty, "Failed to check ringct signatures: missing MLSAG key image"); + const bool ki_match = 0 == memcmp(&nth_vin_image, &rv.p.MGs[n].II[0], 32); + VER_ASSERT(ki_match, "Failed to check ringct signatures: mismatched MLSAG key image"); + } + } + + // Mix ring data is now known to be correctly incorporated into the RCT sig inside tx. + return rct::verRctNonSemanticsSimple(rv); +} + +// Create a unique identifier for pair of tx blob + mix ring +static crypto::hash calc_tx_mixring_hash(const transaction& tx, const rct::ctkeyM& mix_ring) +{ + std::stringstream ss; + + // Start with domain seperation + ss << config::HASH_KEY_TXHASH_AND_MIXRING; + + // Then add TX hash + const crypto::hash tx_hash = get_transaction_hash(tx); + ss.write(tx_hash.data, sizeof(crypto::hash)); + + // Then serialize mix ring + binary_archive<true> ar(ss); + ::do_serialize(ar, const_cast<rct::ctkeyM&>(mix_ring)); + + // Calculate hash of TX hash and mix ring blob + crypto::hash tx_and_mixring_hash; + get_blob_hash(ss.str(), tx_and_mixring_hash); + + return tx_and_mixring_hash; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// + +namespace cryptonote +{ + +bool ver_rct_non_semantics_simple_cached +( + transaction& tx, + const rct::ctkeyM& mix_ring, + rct_ver_cache_t& cache, + const std::uint8_t rct_type_to_cache +) +{ + // Hello future Monero dev! If you got this assert, read the following carefully: + // + // For this version of RCT, the way we guaranteed that verification caches do not generate false + // positives (and thus possibly enabling double spends) is we take a hash of two things. One, + // we use get_transaction_hash() which gives us a (cryptographically secure) unique + // representation of all "knobs" controlled by the possibly malicious constructor of the + // transaction. Two, we take a hash of all *previously validated* blockchain data referenced by + // this transaction which is required to validate the ring signature. In our case, this is the + // mixring. Future versions of the protocol may differ in this regard, but if this assumptions + // holds true in the future, enable the verification hash by modifying the `untested_tx` + // condition below. + const bool untested_tx = tx.version > 2 || tx.rct_signatures.type > rct::RCTTypeBulletproofPlus; + VER_ASSERT(!untested_tx, "Unknown TX type. Make sure RCT cache works correctly with this type and then enable it in the code here."); + + // Don't cache older (or newer) rctSig types + // This cache only makes sense when it caches data from mempool first, + // so only "current fork version-enabled" RCT types need to be cached + if (tx.rct_signatures.type != rct_type_to_cache) + { + MDEBUG("RCT cache: tx " << get_transaction_hash(tx) << " skipped"); + return expand_tx_and_ver_rct_non_sem(tx, mix_ring); + } + + // Generate unique hash for tx+mix_ring pair + const crypto::hash tx_mixring_hash = calc_tx_mixring_hash(tx, mix_ring); + + // Search cache for successful verification of same TX + mix ring combination + if (cache.has(tx_mixring_hash)) + { + MDEBUG("RCT cache: tx " << get_transaction_hash(tx) << " hit"); + return true; + } + + // We had a cache miss, so now we must expand the mix ring and do full verification + MDEBUG("RCT cache: tx " << get_transaction_hash(tx) << " missed"); + if (!expand_tx_and_ver_rct_non_sem(tx, mix_ring)) + { + return false; + } + + // At this point, the TX RCT verified successfully, so add it to the cache and return true + cache.add(tx_mixring_hash); + + return true; +} + +} // namespace cryptonote diff --git a/src/cryptonote_core/tx_verification_utils.h b/src/cryptonote_core/tx_verification_utils.h new file mode 100644 index 000000000..ccd401d2a --- /dev/null +++ b/src/cryptonote_core/tx_verification_utils.h @@ -0,0 +1,78 @@ +// Copyright (c) 2023, The Monero Project +// +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without modification, are +// permitted provided that the following conditions are met: +// +// 1. Redistributions of source code must retain the above copyright notice, this list of +// conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright notice, this list +// of conditions and the following disclaimer in the documentation and/or other +// materials provided with the distribution. +// +// 3. Neither the name of the copyright holder nor the names of its contributors may be +// used to endorse or promote products derived from this software without specific +// prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY +// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL +// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF +// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#pragma once + +#include "common/data_cache.h" +#include "cryptonote_basic/cryptonote_basic.h" + +namespace cryptonote +{ + +// Modifying this value should not affect consensus. You can adjust it for performance needs +static constexpr const size_t RCT_VER_CACHE_SIZE = 8192; + +using rct_ver_cache_t = ::tools::data_cache<::crypto::hash, RCT_VER_CACHE_SIZE>; + +/** + * @brief Cached version of rct::verRctNonSemanticsSimple + * + * This function will not affect how the transaction is serialized and it will never modify the + * transaction prefix. + * + * The reference to tx is mutable since the transaction's ring signatures may be expanded by + * Blockchain::expand_transaction_2. However, on cache hits, the transaction will not be + * expanded. This means that the caller does not need to call expand_transaction_2 on this + * transaction before passing it; the transaction will not successfully verify with "old" RCT data + * if the transaction has been otherwise modified since the last verification. + * + * But, if cryptonote::get_transaction_hash(tx) returns a "stale" hash, this function is not + * guaranteed to work. So make sure that the cryptonote::transaction passed has not had + * modifications to it since the last time its hash was fetched without properly invalidating the + * hashes. + * + * rct_type_to_cache can be any RCT version value as long as rct::verRctNonSemanticsSimple works for + * this RCT version, but for most applications, it doesn't make sense to not make this version + * the "current" RCT version (i.e. the version that transactions in the mempool are). + * + * @param tx transaction which contains RCT signature to verify + * @param mix_ring mixring referenced by this tx. THIS DATA MUST BE PREVIOUSLY VALIDATED + * @param cache saves tx+mixring hashes used to cache calls + * @param rct_type_to_cache Only RCT sigs with version (e.g. RCTTypeBulletproofPlus) will be cached + * @return true when verRctNonSemanticsSimple() w/ expanded tx.rct_signatures would return true + * @return false when verRctNonSemanticsSimple() w/ expanded tx.rct_signatures would return false + */ +bool ver_rct_non_semantics_simple_cached +( + transaction& tx, + const rct::ctkeyM& mix_ring, + rct_ver_cache_t& cache, + std::uint8_t rct_type_to_cache +); + +} // namespace cryptonote diff --git a/src/ringct/rctSigs.cpp b/src/ringct/rctSigs.cpp index 7b16f017b..477a7907d 100644 --- a/src/ringct/rctSigs.cpp +++ b/src/ringct/rctSigs.cpp @@ -30,7 +30,6 @@ #include "misc_log_ex.h" #include "misc_language.h" -#include "common/data_cache.h" #include "common/perf_timer.h" #include "common/threadpool.h" #include "common/util.h" @@ -1579,42 +1578,6 @@ namespace rct { } } - bool verRctNonSemanticsSimpleCached(const rctSig & rv) - { - // Hello future Monero dev! If you got this assert, read the following carefully: - // - // RCT cache assumes that this function will serialize and hash all rv's fields used for RingCT verification - // If you're about to add a new RCTType here, first you must check that binary_archive serialization writes all rv's fields to the binary blob - // If it's not the case, rewrite this function to serialize everything, even some "temporary" fields which are not serialized normally - CHECK_AND_ASSERT_MES_L1(rv.type <= RCTTypeBulletproofPlus, false, "Unknown RCT type. Make sure RCT cache works correctly with this type and then enable it in the code here."); - - // Don't cache older (or newer) rctSig types - // This cache only makes sense when it caches data from mempool first, - // so only "current fork version-enabled" RCT types need to be cached - if (rv.type != RCTTypeBulletproofPlus) - return verRctNonSemanticsSimple(rv); - - // Get the hash of rv - std::stringstream ss; - binary_archive<true> ar(ss); - - ::do_serialize(ar, const_cast<rctSig&>(rv)); - - crypto::hash h; - cryptonote::get_blob_hash(ss.str(), h); - - static tools::data_cache<crypto::hash, 8192> cache; - - if (cache.has(h)) - return true; - - const bool res = verRctNonSemanticsSimple(rv); - if (res) - cache.add(h); - - return res; - } - //RingCT protocol //genRct: // creates an rctSig with all data necessary to verify the rangeProofs and that the signer owns one of the diff --git a/src/ringct/rctSigs.h b/src/ringct/rctSigs.h index 18c7e5fe6..17cfd77b9 100644 --- a/src/ringct/rctSigs.h +++ b/src/ringct/rctSigs.h @@ -132,7 +132,6 @@ namespace rct { bool verRctSemanticsSimple(const rctSig & rv); bool verRctSemanticsSimple(const std::vector<const rctSig*> & rv); bool verRctNonSemanticsSimple(const rctSig & rv); - bool verRctNonSemanticsSimpleCached(const rctSig & rv); static inline bool verRctSimple(const rctSig & rv) { return verRctSemanticsSimple(rv) && verRctNonSemanticsSimple(rv); } xmr_amount decodeRct(const rctSig & rv, const key & sk, unsigned int i, key & mask, hw::device &hwdev); xmr_amount decodeRct(const rctSig & rv, const key & sk, unsigned int i, hw::device &hwdev); diff --git a/src/ringct/rctTypes.h b/src/ringct/rctTypes.h index 59ed4d6a6..ab1a26b26 100644 --- a/src/ringct/rctTypes.h +++ b/src/ringct/rctTypes.h @@ -97,6 +97,14 @@ namespace rct { struct ctkey { key dest; key mask; //C here if public + + bool operator==(const ctkey &other) const { + return (dest == other.dest) && (mask == other.mask); + } + + bool operator!=(const ctkey &other) const { + return !(*this == other); + } }; typedef std::vector<ctkey> ctkeyV; typedef std::vector<ctkeyV> ctkeyM; |