func NewOcCredLoadFromFile(filename string) (*OcCred, error) {
if filename == "" {
filename = PRIVATE_KEY_FILENAME
}
file, err := util.GetAppData(filename)
if err != nil {
return nil, fmt.Errorf("error getting app data: %v", err.Error())
}
var d big.Int
fmt.Fscanf(file, "%x\n", &d)
curve := elliptic.P256()
x, y := curve.ScalarBaseMult(d.Bytes())
priv := ecdsa.PrivateKey{
PublicKey: ecdsa.PublicKey{
Curve: curve,
X: x,
Y: y,
},
D: &d,
}
ocCred := OcCred{
Priv: &priv,
}
return &ocCred, nil
}
func NewOcCredLoadOrCreate(filename string) (*OcCred, error) {
if filename == "" {
filename = PRIVATE_KEY_FILENAME
}
file, _ := util.GetAppData(filename)
if file != nil {
return NewOcCredLoadFromFile(filename)
} else {
ocCred := NewOcCred()
err := ocCred.StorePrivateKey("")
if err != nil {
return nil, err
}
return ocCred, nil
}
}