laconicd-deprecated/types/utils.go
2018-08-08 21:06:40 -04:00

42 lines
1.1 KiB
Go

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