261f86fdf2
* bump sdk version to v0.39.0 candidate * updates * update evm * bump commit * more changes * build * genesis * fix tests * fix tests * bump commit * bump commit * bump commit * add keygen func * bump version to 0.39.0-rc0 * update AnteHandler * fix TxDecoder * lint * fix test * update statedb * changelog * fixes * remove extra files * update make test-import * rename test * bump SDK version to final release * update to 0.39.1-rc1 * fix evm tests * update RPC * minor fixes * update to rc2 * bump to v0.39.1 * fix personal API * fix string type cast ambiguity (#449) * init * fix estimate gas test * minor genesis change * remove comments from unstable commit (stargate release) Co-authored-by: Alessio Treglia <quadrispro@ubuntu.com>
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
package crypto
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import (
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"fmt"
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"github.com/pkg/errors"
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"crypto/hmac"
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"crypto/sha512"
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"github.com/tyler-smith/go-bip39"
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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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)
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const (
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// EthSecp256k1 defines the ECDSA secp256k1 used on Ethereum
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EthSecp256k1 = keys.SigningAlgo("eth_secp256k1")
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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 PrivKeySecp256k1(bz), nil
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}
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func DeriveSecp256k1(mnemonic, bip39Passphrase, _ string) ([]byte, error) {
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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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// HMAC the seed to produce the private key and chain code
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mac := hmac.New(sha512.New, []byte("Bitcoin seed"))
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_, err = mac.Write(seed)
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if err != nil {
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return nil, err
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}
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seed = mac.Sum(nil)
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priv, err := ethcrypto.ToECDSA(seed[:32])
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if err != nil {
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return nil, err
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}
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derivedKey := PrivKeySecp256k1(ethcrypto.FromECDSA(priv))
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return derivedKey, nil
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}
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