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33 lines
1.3 KiB
C++
33 lines
1.3 KiB
C++
// Copyright (c) 2020 The Bitcoin Core developers
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// Distributed under the MIT 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 <key.h>
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#include <secp256k1.h>
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#include <test/fuzz/FuzzedDataProvider.h>
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#include <test/fuzz/fuzz.h>
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#include <test/fuzz/util.h>
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#include <cstdint>
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#include <vector>
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bool SigHasLowR(const secp256k1_ecdsa_signature* sig);
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int ecdsa_signature_parse_der_lax(const secp256k1_context* ctx, secp256k1_ecdsa_signature* sig, const unsigned char* input, size_t inputlen);
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FUZZ_TARGET(secp256k1_ecdsa_signature_parse_der_lax)
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{
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FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
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const std::vector<uint8_t> signature_bytes = ConsumeRandomLengthByteVector(fuzzed_data_provider);
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if (signature_bytes.data() == nullptr) {
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return;
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}
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secp256k1_context* secp256k1_context_verify = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY);
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secp256k1_ecdsa_signature sig_der_lax;
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const bool parsed_der_lax = ecdsa_signature_parse_der_lax(secp256k1_context_verify, &sig_der_lax, signature_bytes.data(), signature_bytes.size()) == 1;
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if (parsed_der_lax) {
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ECC_Start();
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(void)SigHasLowR(&sig_der_lax);
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ECC_Stop();
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}
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secp256k1_context_destroy(secp256k1_context_verify);
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}
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