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https://github.com/ton-blockchain/ton
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25b4c6794a
* TVM instructions: SECP256K1_XONLY_PUBKEY_TWEAK_ADD, SETCONTCTRMANY(X) * Add tests for xonly_pubkey_tweak_add * added secp256k1 as submodule, since we need extrakeys feature of secp256k1 * cleanup * add ton_crypto_core secp256k1 dependency * adjust Dockerfile, android and wasm builds * adjust nix build * test windows build with SECP256K1_ENABLE_MODULE_EXTRAKEYS * test windows build with SECP256K1_ENABLE_MODULE_EXTRAKEYS * adjust android build * adjust emscripten build * adjust emscripten build * try macos-13 * emscripten build adjustments * windows build adjustments * final corrections --------- Co-authored-by: neodix <neodix@ton.org>
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "secp256k1.h"
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#include "td/utils/check.h"
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#include "td/utils/logging.h"
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#include <secp256k1_recovery.h>
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#include <secp256k1_extrakeys.h>
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#include <cstring>
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namespace td::secp256k1 {
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static const secp256k1_context* get_context() {
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static secp256k1_context* ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY);
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LOG_CHECK(ctx) << "Failed to create secp256k1_context";
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return ctx;
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}
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bool ecrecover(const unsigned char* hash, const unsigned char* signature, unsigned char* public_key) {
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const secp256k1_context* ctx = get_context();
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secp256k1_ecdsa_recoverable_signature ecdsa_signature;
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if (signature[64] > 3 ||
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!secp256k1_ecdsa_recoverable_signature_parse_compact(ctx, &ecdsa_signature, signature, signature[64])) {
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return false;
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}
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secp256k1_pubkey pubkey;
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if (!secp256k1_ecdsa_recover(ctx, &pubkey, &ecdsa_signature, hash)) {
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return false;
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}
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size_t len = 65;
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secp256k1_ec_pubkey_serialize(ctx, public_key, &len, &pubkey, SECP256K1_EC_UNCOMPRESSED);
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CHECK(len == 65);
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return true;
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}
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bool xonly_pubkey_tweak_add(const unsigned char* xonly_pubkey_bytes, const unsigned char* tweak,
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unsigned char* output_pubkey_bytes) {
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const secp256k1_context* ctx = get_context();
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secp256k1_xonly_pubkey xonly_pubkey;
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secp256k1_pubkey output_pubkey;
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if (!secp256k1_xonly_pubkey_parse(ctx, &xonly_pubkey, xonly_pubkey_bytes)) {
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return false;
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}
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if (!secp256k1_xonly_pubkey_tweak_add(ctx, &output_pubkey, &xonly_pubkey, tweak)) {
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return false;
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}
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size_t len = 65;
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secp256k1_ec_pubkey_serialize(ctx, output_pubkey_bytes, &len, &output_pubkey, SECP256K1_EC_UNCOMPRESSED);
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CHECK(len == 65);
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return true;
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}
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} // namespace td::secp256k1
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