53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
package types
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import (
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"crypto/ecdsa"
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"fmt"
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ethcmn "github.com/ethereum/go-ethereum/common"
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ethcrypto "github.com/ethereum/go-ethereum/crypto"
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ethsha "github.com/ethereum/go-ethereum/crypto/sha3"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/pkg/errors"
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)
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// PrivKeyToEthAddress generates an Ethereum address given an ECDSA private key.
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func PrivKeyToEthAddress(p *ecdsa.PrivateKey) ethcmn.Address {
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return ethcrypto.PubkeyToAddress(p.PublicKey)
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}
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// GenerateAddress generates an Ethereum address.
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func GenerateEthAddress() ethcmn.Address {
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priv, err := ethcrypto.GenerateKey()
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if err != nil {
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panic(err)
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}
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return PrivKeyToEthAddress(priv)
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}
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// ValidateSigner attempts to validate a signer for a given slice of bytes over
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// which a signature and signer is given. An error is returned if address
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// derived from the signature and bytes signed does not match the given signer.
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func ValidateSigner(signBytes, sig []byte, signer ethcmn.Address) error {
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pk, err := ethcrypto.SigToPub(signBytes, sig)
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if err != nil {
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return errors.Wrap(err, "failed to derive public key from signature")
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} else if ethcrypto.PubkeyToAddress(*pk) != signer {
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return fmt.Errorf("invalid signature for signer: %s", signer)
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}
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return nil
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}
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func rlpHash(x interface{}) (hash ethcmn.Hash) {
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hasher := ethsha.NewKeccak256()
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rlp.Encode(hasher, x)
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hasher.Sum(hash[:0])
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return
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}
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