Bitcoin Core  22.99.0
P2P Digital Currency
secp256k1_ec_seckey_import_export_der.cpp
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1 // Copyright (c) 2020 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <key.h>
6 #include <secp256k1.h>
8 #include <test/fuzz/fuzz.h>
9 #include <test/fuzz/util.h>
10 
11 #include <cstdint>
12 #include <vector>
13 
14 int ec_seckey_import_der(const secp256k1_context* ctx, unsigned char* out32, const unsigned char* seckey, size_t seckeylen);
15 int ec_seckey_export_der(const secp256k1_context* ctx, unsigned char* seckey, size_t* seckeylen, const unsigned char* key32, bool compressed);
16 
17 FUZZ_TARGET(secp256k1_ec_seckey_import_export_der)
18 {
19  FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
21  {
22  std::vector<uint8_t> out32(32);
23  (void)ec_seckey_import_der(secp256k1_context_sign, out32.data(), ConsumeFixedLengthByteVector(fuzzed_data_provider, CKey::SIZE).data(), CKey::SIZE);
24  }
25  {
26  std::vector<uint8_t> seckey(CKey::SIZE);
27  const std::vector<uint8_t> key32 = ConsumeFixedLengthByteVector(fuzzed_data_provider, 32);
28  size_t seckeylen = CKey::SIZE;
29  const bool compressed = fuzzed_data_provider.ConsumeBool();
30  const bool exported = ec_seckey_export_der(secp256k1_context_sign, seckey.data(), &seckeylen, key32.data(), compressed);
31  if (exported) {
32  std::vector<uint8_t> out32(32);
33  const bool imported = ec_seckey_import_der(secp256k1_context_sign, out32.data(), seckey.data(), seckey.size()) == 1;
34  assert(imported && key32 == out32);
35  }
36  }
38 }
assert
assert(!tx.IsCoinBase())
SECP256K1_CONTEXT_SIGN
#define SECP256K1_CONTEXT_SIGN
Definition: secp256k1.h:185
secp256k1_context_struct
Definition: secp256k1.c:75
util.h
secp256k1_context_destroy
SECP256K1_API void secp256k1_context_destroy(secp256k1_context *ctx)
Destroy a secp256k1 context object (created in dynamically allocated memory).
Definition: secp256k1.c:202
secp256k1_context_create
SECP256K1_API secp256k1_context * secp256k1_context_create(unsigned int flags) SECP256K1_WARN_UNUSED_RESULT
Create a secp256k1 context object (in dynamically allocated memory).
Definition: secp256k1.c:158
CKey::SIZE
static const unsigned int SIZE
secp256k1:
Definition: key.h:32
ec_seckey_import_der
int ec_seckey_import_der(const secp256k1_context *ctx, unsigned char *out32, const unsigned char *seckey, size_t seckeylen)
These functions are taken from the libsecp256k1 distribution and are very ugly.
Definition: key.cpp:37
secp256k1.h
FuzzedDataProvider.h
FUZZ_TARGET
FUZZ_TARGET(secp256k1_ec_seckey_import_export_der)
Definition: secp256k1_ec_seckey_import_export_der.cpp:17
key.h
fuzz.h
FuzzedDataProvider
Definition: FuzzedDataProvider.h:31
secp256k1_context_sign
static secp256k1_context * secp256k1_context_sign
Definition: key.cpp:18
ConsumeFixedLengthByteVector
std::vector< uint8_t > ConsumeFixedLengthByteVector(FuzzedDataProvider &fuzzed_data_provider, const size_t length) noexcept
Returns a byte vector of specified size regardless of the number of remaining bytes available from th...
Definition: util.h:230
ec_seckey_export_der
int ec_seckey_export_der(const secp256k1_context *ctx, unsigned char *seckey, size_t *seckeylen, const unsigned char *key32, bool compressed)
This serializes to a DER encoding of the ECPrivateKey type from section C.4 of SEC 1 https://www....
Definition: key.cpp:94
ctx
static secp256k1_context * ctx
Definition: tests.c:42