func SignatureVerify(publicKey, sig, hash []byte) bool {
b, _ := base58.DecodeToBig(publicKey)
publ := splitBig(b, 2)
x, y := publ[0], publ[1]
b, _ = base58.DecodeToBig(sig)
sigg := splitBig(b, 2)
r, s := sigg[0], sigg[1]
pub := ecdsa.PublicKey{elliptic.P224(), x, y}
return ecdsa.Verify(&pub, hash, r, s)
}
// NewNodeIDFromString generates NodeID from the given base58-encoded string.
func NewNodeIDFromString(str string) (NodeID, error) {
i, err := base58.DecodeToBig([]byte(str))
if err != nil {
return NodeID{}, err
}
return NewNodeIDFromBytes(i.Bytes())
}
func checkSignature(signature string, request string, token string) bool {
mac := hmac.New(sha256.New, []byte(token))
mac.Write([]byte(request))
expectedMAC := mac.Sum(nil)
decoded_sig, _ := base58.DecodeToBig([]byte(signature))
messageMAC := decoded_sig.Bytes()
return hmac.Equal(messageMAC, expectedMAC)
}
func (k *Keypair) Sign(hash []byte) ([]byte, error) {
d, err := base58.DecodeToBig(k.Private)
if err != nil {
return nil, err
}
b, _ := base58.DecodeToBig(k.Public)
pub := splitBig(b, 2)
x, y := pub[0], pub[1]
key := ecdsa.PrivateKey{ecdsa.PublicKey{elliptic.P224(), x, y}, d}
r, s, _ := ecdsa.Sign(rand.Reader, &key, hash)
return base58.EncodeBig([]byte{}, bigJoin(KEY_SIZE, r, s)), nil
}
func BenchmarkBase58DecodeStringSmall(b *testing.B) {
data := make([]byte, 8)
data[0] = 0xff // without this, it's just an inefficient zero
data = []byte(basen.Base58.EncodeToString(data))
b.SetBytes(int64(len(data)))
b.ResetTimer()
for i := 0; i < b.N; i++ {
base58.DecodeToBig(data)
}
}
// PrivateKeyFromString generates PrivateKey from the given base58-encoded string.
func PrivateKeyFromString(str string) *PrivateKey {
b, err := base58.DecodeToBig([]byte(str))
if err != nil {
return nil
}
var out PrivateKey
err = msgpack.Unmarshal(b.Bytes(), &out)
if err != nil {
return nil
}
if !out.verifyKey() {
return nil
}
return &out
}
func main() {
log.SetFlags(0)
log.SetPrefix(prog + ": ")
flag.Usage = usage
flag.Parse()
if flag.NArg() < 1 {
usage()
os.Exit(1)
}
for _, enc := range flag.Args() {
buf := []byte(enc)
dec, err := base58.DecodeToBig(buf)
if err != nil {
log.Fatal(err)
}
_, err = fmt.Println(dec)
if err != nil {
log.Fatal(err)
}
}
}