4e01da905a
* changelog * update changelog * crypto: refactor for stargate * fixes * fix keys * changelog
97 lines
2.6 KiB
Go
97 lines
2.6 KiB
Go
package hd
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import (
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"fmt"
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"github.com/pkg/errors"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcutil/hdkeychain"
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"github.com/tyler-smith/go-bip39"
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ethaccounts "github.com/ethereum/go-ethereum/accounts"
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ethcrypto "github.com/ethereum/go-ethereum/crypto"
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tmcrypto "github.com/tendermint/tendermint/crypto"
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"github.com/cosmos/cosmos-sdk/crypto/keys"
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"github.com/cosmos/ethermint/crypto/ethsecp256k1"
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)
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const (
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// EthSecp256k1 defines the ECDSA secp256k1 used on Ethereum
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EthSecp256k1 = keys.SigningAlgo(ethsecp256k1.KeyType)
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)
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// SupportedAlgorithms defines the list of signing algorithms used on Ethermint:
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// - eth_secp256k1 (Ethereum)
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// - secp256k1 (Tendermint)
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var SupportedAlgorithms = []keys.SigningAlgo{EthSecp256k1, keys.Secp256k1}
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// EthSecp256k1Options defines a keys options for the ethereum Secp256k1 curve.
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func EthSecp256k1Options() []keys.KeybaseOption {
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return []keys.KeybaseOption{
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keys.WithKeygenFunc(EthermintKeygenFunc),
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keys.WithDeriveFunc(DeriveKey),
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keys.WithSupportedAlgos(SupportedAlgorithms),
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keys.WithSupportedAlgosLedger(SupportedAlgorithms),
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}
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}
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func DeriveKey(mnemonic, bip39Passphrase, hdPath string, algo keys.SigningAlgo) ([]byte, error) {
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switch algo {
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case keys.Secp256k1:
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return keys.StdDeriveKey(mnemonic, bip39Passphrase, hdPath, algo)
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case EthSecp256k1:
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return DeriveSecp256k1(mnemonic, bip39Passphrase, hdPath)
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default:
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return nil, errors.Wrap(keys.ErrUnsupportedSigningAlgo, string(algo))
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}
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}
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// EthermintKeygenFunc is the key generation function to generate secp256k1 ToECDSA
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// from ethereum.
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func EthermintKeygenFunc(bz []byte, algo keys.SigningAlgo) (tmcrypto.PrivKey, error) {
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if algo != EthSecp256k1 {
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return nil, fmt.Errorf("signing algorithm must be %s, got %s", EthSecp256k1, algo)
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}
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return ethsecp256k1.PrivKey(bz), nil
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}
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// DeriveSecp256k1 derives and returns the eth_secp256k1 private key for the given mnemonic and HD path.
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func DeriveSecp256k1(mnemonic, bip39Passphrase, path string) ([]byte, error) {
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hdpath, err := ethaccounts.ParseDerivationPath(path)
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if err != nil {
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return nil, err
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}
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seed, err := bip39.NewSeedWithErrorChecking(mnemonic, bip39Passphrase)
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if err != nil {
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return nil, err
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}
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masterKey, err := hdkeychain.NewMaster(seed, &chaincfg.MainNetParams)
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if err != nil {
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return nil, err
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}
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key := masterKey
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for _, n := range hdpath {
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key, err = key.Child(n)
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if err != nil {
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return nil, err
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}
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}
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privateKey, err := key.ECPrivKey()
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if err != nil {
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return nil, err
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}
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privateKeyECDSA := privateKey.ToECDSA()
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derivedKey := ethsecp256k1.PrivKey(ethcrypto.FromECDSA(privateKeyECDSA))
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return derivedKey, nil
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}
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