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keybag.go
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keybag.go
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package crypto
import (
"bufio"
"os"
"strings"
"github.com/CybexDex/cybex-go/types"
"github.com/CybexDex/cybex-go/util"
"github.com/juju/errors"
)
// KeyBag is a PrivateKey collection for signing and verifying purposes.
type KeyBag struct {
keys []*types.PrivateKey
}
func NewKeyBag() *KeyBag {
bag := KeyBag{
keys: make([]*types.PrivateKey, 0),
}
return &bag
}
func (p KeyBag) Marshal(enc *util.TypeEncoder) error {
if err := enc.EncodeUVarint(uint64(len(p.keys))); err != nil {
return errors.Annotate(err, "encode length")
}
for _, k := range p.keys {
if err := enc.Encode(k); err != nil {
return errors.Annotate(err, "encode Key")
}
}
return nil
}
func (p *KeyBag) Unmarshal(dec *util.TypeDecoder) error {
var len uint64
if err := dec.DecodeUVarint(&len); err != nil {
return errors.Annotate(err, "decode length")
}
for i := len; i > 0; i-- {
key := &types.PrivateKey{}
if err := dec.Decode(&key); err != nil {
return errors.Annotate(err, "decode key")
}
p.keys = append(p.keys, key)
}
return nil
}
func (b *KeyBag) Add(wifKey string) error {
privKey, err := types.NewPrivateKeyFromWif(wifKey)
if err != nil {
return errors.Annotate(err, "NewPrivateKeyFromWif")
}
b.keys = append(b.keys, privKey)
return nil
}
// Merge ...
func (b *KeyBag) Merge(a *KeyBag) error {
for _, privKey := range a.keys {
add := true
for _, k := range b.keys {
if k.PublicKey().Equal(privKey.PublicKey()) {
add = false
}
}
if add {
b.keys = append(b.keys, privKey)
}
}
return nil
}
func (b *KeyBag) Remove(pub string) bool {
for _, p := range b.Publics() {
if p.String() == pub {
for idx, k := range b.keys {
if k.PublicKey().Equal(&p) {
b.keys = append(b.keys[:idx], b.keys[idx+1:]...)
return true
}
}
}
}
return false
}
func (b *KeyBag) ImportFromFile(path string) error {
inFile, err := os.Open(path)
if err != nil {
return errors.Errorf("import keys from file [%s], %s", path, err)
}
defer inFile.Close()
scanner := bufio.NewScanner(inFile)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
key := strings.TrimSpace(strings.Split(scanner.Text(), " ")[0])
if strings.Contains(key, "/") || strings.Contains(key, "#") || strings.Contains(key, ";") {
return errors.Errorf("lines should consist of a private key on each line, with an optional whitespace and comment")
}
if err := b.Add(key); err != nil {
return err
}
}
return nil
}
func (b KeyBag) Publics() (out types.PublicKeys) {
for _, k := range b.keys {
pub := k.PublicKey()
out = append(out, *pub)
}
return
}
func (b KeyBag) PublicPresent(pub *types.PublicKey) bool {
for _, k := range b.keys {
if k.PublicKey().Equal(pub) {
return true
}
}
return false
}
func (b KeyBag) Privates() (out types.PrivateKeys) {
for _, k := range b.keys {
priv := k
out = append(out, *priv)
}
return
}
func (b KeyBag) PrivatesByPublics(pubKeys types.PublicKeys) (out types.PrivateKeys) {
for _, pub := range pubKeys {
for _, k := range b.keys {
if pub.Equal(k.PublicKey()) {
priv := k
out = append(out, *priv)
}
}
}
return
}