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Changed new methods to use ecdsa package for pub prv keys

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This commit is contained in:
obscuren 2014-12-10 14:17:10 +01:00
parent 186948da22
commit 0f5c6c5e2d
2 changed files with 36 additions and 27 deletions
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57
crypto/crypto.go
View File

@ -18,19 +18,6 @@ func init() {
ecies.AddParamsForCurve(S256(), ecies.ECIES_AES128_SHA256)
}
func ToECDSA(prv []byte) *ecdsa.PrivateKey {
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 {
return prv.D.Bytes()
}
// TODO refactor, remove (bin)
func Sha3(data []byte) []byte {
d := sha3.NewKeccak256()
d.Write(data)
@ -67,23 +54,45 @@ func Ecrecover(data []byte) []byte {
return r
}
func SigToPub(hash, sig []byte) []byte {
return Ecrecover(append(hash, sig...))
// New methods using proper ecdsa keys from the stdlib
func ToECDSA(prv []byte) *ecdsa.PrivateKey {
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 Sign(hash, prv []byte) (sig []byte, err error) {
sig, err = secp256k1.Sign(hash, prv)
func FromECDSA(prv *ecdsa.PrivateKey) []byte {
return prv.D.Bytes()
}
func PubToECDSA(pub []byte) *ecdsa.PublicKey {
x, y := elliptic.Unmarshal(S256(), pub)
return &ecdsa.PublicKey{S256(), x, 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, message []byte) ([]byte, error) {
x, y := elliptic.Unmarshal(S256(), pub)
epub := &ecdsa.PublicKey{S256(), x, y}
return ecies.Encrypt(rand.Reader, ecies.ImportECDSAPublic(epub), message, nil, nil)
func Encrypt(pub *ecdsa.PublicKey, message []byte) ([]byte, error) {
return ecies.Encrypt(rand.Reader, ecies.ImportECDSAPublic(pub), message, nil, nil)
}
func Decrypt(prv, ct []byte) ([]byte, error) {
key := ecies.ImportECDSA(ToECDSA(prv))
func Decrypt(prv *ecdsa.PrivateKey, ct []byte) ([]byte, error) {
key := ecies.ImportECDSA(prv)
return key.Decrypt(rand.Reader, ct, nil, nil)
}

6
crypto/encrypt_decrypt_test.go
View File

@ -9,9 +9,9 @@ import (
)
func TestBox(t *testing.T) {
prv1 := ethutil.Hex2Bytes("4b50fa71f5c3eeb8fdc452224b2395af2fcc3d125e06c32c82e048c0559db03f")
prv2 := ethutil.Hex2Bytes("d0b043b4c5d657670778242d82d68a29d25d7d711127d17b8e299f156dad361a")
pub2 := ethutil.Hex2Bytes("04bd27a63c91fe3233c5777e6d3d7b39204d398c8f92655947eb5a373d46e1688f022a1632d264725cbc7dc43ee1cfebde42fa0a86d08b55d2acfbb5e9b3b48dc5")
prv1 := ToECDSA(ethutil.Hex2Bytes("4b50fa71f5c3eeb8fdc452224b2395af2fcc3d125e06c32c82e048c0559db03f"))
prv2 := ToECDSA(ethutil.Hex2Bytes("d0b043b4c5d657670778242d82d68a29d25d7d711127d17b8e299f156dad361a"))
pub2 := PubToECDSA(ethutil.Hex2Bytes("04bd27a63c91fe3233c5777e6d3d7b39204d398c8f92655947eb5a373d46e1688f022a1632d264725cbc7dc43ee1cfebde42fa0a86d08b55d2acfbb5e9b3b48dc5"))
message := []byte("Hello, world.")
ct, err := Encrypt(pub2, message)