merge bitcoin#23595: Add ParseHex<std::byte>() helper

includes:
- facd1fb911abfc595a3484ee53397eff515d4c40

continuation of cf4522f8 in dash#5901

src/key.cpp

@@ -348,11 +348,11 @@ bool CExtKey::Derive(CExtKey &out, unsigned int _nChild) const {
     return key.Derive(out.key, out.chaincode, _nChild, chaincode);
 }
 
-void CExtKey::SetSeed(Span<const uint8_t> seed)
+void CExtKey::SetSeed(Span<const std::byte> seed)
 {
     static const unsigned char hashkey[] = {'B','i','t','c','o','i','n',' ','s','e','e','d'};
     std::vector<unsigned char, secure_allocator<unsigned char>> vout(64);
-    CHMAC_SHA512{hashkey, sizeof(hashkey)}.Write(seed.data(), seed.size()).Finalize(vout.data());
+    CHMAC_SHA512{hashkey, sizeof(hashkey)}.Write(UCharCast(seed.data()), seed.size()).Finalize(vout.data());
     key.Set(vout.data(), vout.data() + 32, true);
     memcpy(chaincode.begin(), vout.data() + 32, 32);
     nDepth = 0;

src/key.h

@@ -91,7 +91,7 @@ public:
 
     //! Simple read-only vector-like interface.
     unsigned int size() const { return (fValid ? keydata.size() : 0); }
-    const unsigned char* data() const { return keydata.data(); }
+    const std::byte* data() const { return reinterpret_cast<const std::byte*>(keydata.data()); }
     const unsigned char* begin() const { return keydata.data(); }
     const unsigned char* end() const { return keydata.data() + size(); }
 
@@ -188,7 +188,7 @@ struct CExtKey {
     void Decode(const unsigned char code[BIP32_EXTKEY_SIZE]);
     bool Derive(CExtKey& out, unsigned int nChild) const;
     CExtPubKey Neuter() const;
-    void SetSeed(Span<const uint8_t> seed);
+    void SetSeed(Span<const std::byte> seed);
 };
 
 /** Initialize the elliptic curve support. May not be called twice without calling ECC_Stop first. */

src/test/bip32_tests.cpp

@@ -120,11 +120,12 @@ const std::vector<std::string> TEST5 = {
     "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHL"
 };
 
-void RunTest(const TestVector &test) {
+void RunTest(const TestVector& test)
-    std::vector<unsigned char> seed = ParseHex(test.strHexMaster);
+{
+    std::vector<std::byte> seed{ParseHex<std::byte>(test.strHexMaster)};
     CExtKey key;
     CExtPubKey pubkey;
-    key.SetSeed(seed);
+    key.SetSeed(MakeByteSpan(seed));
     pubkey = key.Neuter();
     for (const TestDerivation &derive : test.vDerive) {
         unsigned char data[74];

src/test/key_io_tests.cpp

@@ -36,7 +36,7 @@ BOOST_AUTO_TEST_CASE(key_io_valid_parse)
             continue;
         }
         std::string exp_base58string = test[0].get_str();
-        std::vector<unsigned char> exp_payload = ParseHex(test[1].get_str());
+        const std::vector<std::byte> exp_payload{ParseHex<std::byte>(test[1].get_str())};
         const UniValue &metadata = test[2].get_obj();
         bool isPrivkey = find_value(metadata, "isPrivkey").get_bool();
         SelectParams(find_value(metadata, "chain").get_str());

src/wallet/hdchain.cpp

@@ -140,7 +140,7 @@ void CHDChain::DeriveChildExtKey(uint32_t nAccountIndex, bool fInternal, uint32_
     CExtKey changeKey;              //key at m/purpose'/coin_type'/account'/change
     CExtKey childKey;               //key at m/purpose'/coin_type'/account'/change/address_index
 
-    masterKey.SetSeed(vchSeed);
+    masterKey.SetSeed(MakeByteSpan(vchSeed));
 
     // Use hardened derivation for purpose, coin_type and account
     // (keys >= 0x80000000 are hardened after bip32)

src/wallet/rpcdump.cpp

@@ -1007,7 +1007,7 @@ RPCHelpMan dumpwallet()
         file << "# HD seed: " << HexStr(vchSeed) << "\n\n";
 
         CExtKey masterKey;
-        masterKey.SetSeed(vchSeed);
+        masterKey.SetSeed(MakeByteSpan(vchSeed));
 
         file << "# extended private masterkey: " << EncodeExtKey(masterKey) << "\n";
 

src/wallet/scriptpubkeyman.cpp

@@ -350,7 +350,7 @@ void LegacyScriptPubKeyMan::UpgradeKeyMetadata()
 
     CExtKey masterKey;
     SecureVector vchSeed = hdChainCurrent.GetSeed();
-    masterKey.SetSeed(vchSeed);
+    masterKey.SetSeed(MakeByteSpan(vchSeed));
     CKeyID master_id = masterKey.key.GetPubKey().GetID();
 
     std::unique_ptr<WalletBatch> batch = std::make_unique<WalletBatch>(m_storage.GetDatabase());

src/wallet/test/bip39_tests.cpp

@@ -54,7 +54,7 @@ BOOST_AUTO_TEST_CASE(bip39_vectors)
         CExtKey key;
         CExtPubKey pubkey;
 
-        key.SetSeed(seed);
+        key.SetSeed(MakeByteSpan(seed));
         pubkey = key.Neuter();
 
         // printf("CBitcoinExtKey: %s\n", EncodeExtKey(key).c_str());

src/wallet/wallet.cpp

@@ -5866,7 +5866,7 @@ void CWallet::SetupDescriptorScriptPubKeyMans()
 
     // Get the extended key
     CExtKey master_key;
-    master_key.SetSeed(seed_key);
+    master_key.SetSeed(MakeByteSpan(seed_key));
 
     for (bool internal : {false, true}) {
         { // OUTPUT_TYPE is only one: LEGACY