sami7777
150828b806
- Replace ~320 NULL occurrences with nullptr across 47 files (-184 net lines) - static const -> constexpr for version, coin, utility constants - Collapse 9 PushMessage overloads into 1 variadic template with fold expressions - Convert boost::array -> std::array, boost::type_traits -> std:: equivalents - pwalletMain, pScriptCheckQueue, pScriptCheckThreads -> unique_ptr - mapOrphanBlocks values: raw CBlock* -> unique_ptr<CBlock> - Fix data races: add locks to wallet registration, pindexBest reads, mempool exists - pwalletdbEncryption: raw new/delete -> local unique_ptr, remove exit() calls - PoS reward overflow: CBigNum intermediate for nCoinAge * nRewardCoinYear - memset -> OPENSSL_cleanse for secure zeroing - Fix const-cast UB in SetMerkleBranch - Log silent catch(...) blocks instead of silently swallowing - Enum class: GetMinFeeMode, WalletFeature - std::string_view for 8 utility function parameters - Range-for with structured bindings: 63 iterator loops modernized - std::make_pair -> brace init: 35 sites - Delegating constructors: CWallet, CBlockIndex - Merkle tree caching, std::array for GetMedianTimePast - CScript copy ctor -> = default, operator!= -> = default
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// Copyright (c) 2026 The Triangles developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "crypto_ecdh.h"
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#include <cstring>
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#include <mutex>
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#include <secp256k1.h>
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#include <secp256k1_ecdh.h>
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namespace {
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// One process-wide context is sufficient for ECDH — no signing or verification
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// flags needed. Created lazily on first use; libsecp256k1 contexts are
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// thread-safe for read-only operations like ECDH.
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secp256k1_context* GetECDHContext()
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{
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static std::once_flag once;
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static secp256k1_context* ctx = nullptr;
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std::call_once(once, []() {
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ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
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});
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return ctx;
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}
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// Hash function callback that returns the raw X coordinate of the shared
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// point. Mirrors OpenSSL's ECDH_compute_key behaviour when the KDF is nullptr.
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int hash_xonly(unsigned char* output,
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const unsigned char* x32,
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const unsigned char* /*y32*/,
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void* /*data*/)
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{
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std::memcpy(output, x32, 32);
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return 1;
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}
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} // namespace
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bool ECDH_xonly_secp256k1(unsigned char out32[32],
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const unsigned char privkey32[32],
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const unsigned char* pubkey,
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std::size_t pubkey_len)
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{
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if (pubkey_len != 33 && pubkey_len != 65) return false;
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secp256k1_context* ctx = GetECDHContext();
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if (!ctx) return false;
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secp256k1_pubkey pk;
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if (!secp256k1_ec_pubkey_parse(ctx, &pk, pubkey, pubkey_len))
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return false;
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return secp256k1_ecdh(ctx, out32, &pk, privkey32, hash_xonly, nullptr) == 1;
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}
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