mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-25 21:07:17 +00:00
116 lines
2.4 KiB
Go
116 lines
2.4 KiB
Go
package crypto
|
|
|
|
import (
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"crypto/sha256"
|
|
|
|
"code.google.com/p/go.crypto/ripemd160"
|
|
"github.com/ethereum/go-ethereum/ethutil"
|
|
"github.com/obscuren/ecies"
|
|
"github.com/obscuren/secp256k1-go"
|
|
"github.com/obscuren/sha3"
|
|
)
|
|
|
|
func init() {
|
|
// specify the params for the s256 curve
|
|
ecies.AddParamsForCurve(S256(), ecies.ECIES_AES128_SHA256)
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
// New methods using proper ecdsa keys from the stdlib
|
|
func ToECDSA(prv []byte) *ecdsa.PrivateKey {
|
|
if len(prv) == 0 {
|
|
return nil
|
|
}
|
|
|
|
priv := new(ecdsa.PrivateKey)
|
|
priv.PublicKey.Curve = S256()
|
|
priv.D = ethutil.BigD(prv)
|
|
priv.PublicKey.X, priv.PublicKey.Y = S256().ScalarBaseMult(prv)
|
|
return priv
|
|
}
|
|
|
|
func FromECDSA(prv *ecdsa.PrivateKey) []byte {
|
|
if prv == nil {
|
|
return nil
|
|
}
|
|
return prv.D.Bytes()
|
|
}
|
|
|
|
func ToECDSAPub(pub []byte) *ecdsa.PublicKey {
|
|
if len(pub) == 0 {
|
|
return nil
|
|
}
|
|
x, y := elliptic.Unmarshal(S256(), pub)
|
|
return &ecdsa.PublicKey{S256(), x, y}
|
|
}
|
|
|
|
func FromECDSAPub(pub *ecdsa.PublicKey) []byte {
|
|
if pub == nil {
|
|
return nil
|
|
}
|
|
return elliptic.Marshal(S256(), pub.X, pub.Y)
|
|
}
|
|
|
|
func GenerateKey() (*ecdsa.PrivateKey, error) {
|
|
return ecdsa.GenerateKey(S256(), rand.Reader)
|
|
}
|
|
|
|
func SigToPub(hash, sig []byte) *ecdsa.PublicKey {
|
|
s := Ecrecover(append(hash, sig...))
|
|
x, y := elliptic.Unmarshal(S256(), s)
|
|
|
|
return &ecdsa.PublicKey{S256(), x, y}
|
|
}
|
|
|
|
func Sign(hash []byte, prv *ecdsa.PrivateKey) (sig []byte, err error) {
|
|
sig, err = secp256k1.Sign(hash, prv.D.Bytes())
|
|
return
|
|
}
|
|
|
|
func Encrypt(pub *ecdsa.PublicKey, message []byte) ([]byte, error) {
|
|
return ecies.Encrypt(rand.Reader, ecies.ImportECDSAPublic(pub), message, nil, nil)
|
|
}
|
|
|
|
func Decrypt(prv *ecdsa.PrivateKey, ct []byte) ([]byte, error) {
|
|
key := ecies.ImportECDSA(prv)
|
|
return key.Decrypt(rand.Reader, ct, nil, nil)
|
|
}
|