plugeth/ethcrypto/crypto.go

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package ethcrypto
import (
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"crypto/sha256"
"code.google.com/p/go.crypto/ripemd160"
"github.com/ethereum/go-ethereum/ethutil"
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"github.com/obscuren/secp256k1-go"
"github.com/obscuren/sha3"
)
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// TODO refactor, remove (bin)
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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
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func CreateAddress(b []byte, nonce uint64) []byte {
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return Sha3(ethutil.NewValue([]interface{}{b, nonce}).Encode())[12:]
}
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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
}