go-ethereum/crypto/crypto.go
2014-10-31 12:37:43 +01:00

48 lines
875 B
Go

package crypto
import (
"crypto/sha256"
"code.google.com/p/go.crypto/ripemd160"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/obscuren/secp256k1-go"
"github.com/obscuren/sha3"
)
// TODO refactor, remove (bin)
func Sha3(data []byte) []byte {
d := sha3.NewKeccak256()
d.Write(data)
return d.Sum(nil)
}
// Creates an ethereum address given the bytes and the nonce
func CreateAddress(b []byte, nonce uint64) []byte {
return Sha3(ethutil.NewValue([]interface{}{b, nonce}).Encode())[12:]
}
func Sha256(data []byte) []byte {
hash := sha256.Sum256(data)
return hash[:]
}
func Ripemd160(data []byte) []byte {
ripemd := ripemd160.New()
ripemd.Write(data)
return ripemd.Sum(nil)
}
func Ecrecover(data []byte) []byte {
var in = struct {
hash []byte
sig []byte
}{data[:32], data[32:]}
r, _ := secp256k1.RecoverPubkey(in.hash, in.sig)
return r
}