// ImportPrivateKey imports a private key in SIPA format
func ImportPrivateKey(keydata string, testnet bool) (*ecc.PrivateKey, error) {
// decode and check data
data, err := Base58Decode(keydata)
if err != nil {
return nil, err
}
if testnet {
if data[0] != 0xEF {
msg := fmt.Sprintf("Invalid key version: %d (testnet)\n", int(data[0]))
return nil, errors.New(msg)
}
} else {
if data[0] != 0x80 {
msg := fmt.Sprintf("Invalid key version: %d\n", int(data[0]))
return nil, errors.New(msg)
}
}
// copy key data
var k, c []byte
if len(data) == 37 {
// uncompressed public key
k = data[1:33]
c = data[33:37]
} else if len(data) == 38 {
// compressed public key
k = data[1:34]
c = data[34:38]
if data[33] != 1 {
msg := fmt.Sprintf("Invalid key compression indicator: %d\n", int(data[33]))
return nil, errors.New(msg)
}
} else {
return nil, errors.New("Invalid key format")
}
// recompute and verify checksum
var t []byte
t = append(t, data[0])
t = append(t, k...)
cs := Hash256(t)
if bytes.Compare(c, cs[:4]) != 0 {
return nil, errors.New("Invalid key data")
}
// return key
return ecc.PrivateKeyFromBytes(k)
}
func TestAddress(t *testing.T) {
for _, d := range data {
idhex, err := hex.DecodeString(d.IDhex)
if err != nil {
t.Fatal("test data failure")
}
idaddr, err := Base58Decode(d.IDaddr)
if err != nil {
t.Fatal("test data failure")
}
if !bytes.Equal(idaddr[1:len(idhex)+1], idhex) {
t.Fatal("test data mismatch")
}
pub, err := hex.DecodeString(d.PubHex)
if err != nil {
t.Fatal("test data failure")
}
pubkey, err := ecc.PublicKeyFromBytes(pub)
if err != nil {
t.Fatal("test data failure")
}
if !ecc.IsOnCurve(pubkey.Q) {
t.Fatal("public point not on curve")
}
addr := MakeTestAddress(pubkey)
addr = MakeAddress(pubkey)
if string(addr) != d.IDaddr {
t.Fatal("makeaddress failed")
}
pubkeyhex := hex.EncodeToString(pubkey.Bytes())
if pubkeyhex != d.SerPubHex[90:] {
t.Fatal("pubkey mismatch")
}
if d.Chain != d.SerPubHex[26:90] {
t.Fatal("chain mismatch")
}
if versionMainPublic != d.SerPubHex[:8] {
t.Fatal("version mismatch")
}
b, err := hex.DecodeString(d.SerPubHex)
if err != nil {
t.Fatal("test data failure")
}
b = append(b, prefix(b)...)
pubser := Base58Encode(b)
if pubser != d.SerPubB58 {
t.Fatal("test data failure")
}
prv, err := hex.DecodeString(d.SerPrvHex[90:])
if err != nil {
t.Fatal("test data failure")
}
if len(prv) == 33 {
if prv[0] != 0 {
t.Fatal("no leading zero")
}
prv = prv[1:]
}
prvkey, err := ecc.PrivateKeyFromBytes(prv)
if err != nil {
t.Fatal("privatekeyfrombytes failed")
}
q := ecc.ScalarMultBase(prvkey.D)
if !ecc.IsEqual(q, pubkey.Q) {
t.Fatal("pub/private mismatch")
}
if d.Chain != d.SerPubHex[26:90] {
t.Fatal("chain mismatch")
}
if versionMainPrivate != d.SerPrvHex[:8] {
t.Fatal("version mismatch")
}
b, err = hex.DecodeString(d.SerPrvHex)
if err != nil {
t.Fatal("test data failure")
}
b = append(b, prefix(b)...)
prvser := Base58Encode(b)
if prvser != d.SerPrvB58 {
t.Fatal("test data failure")
}
}
}