Key Manager

- keypair, keyring:
-- consistent naming of methods
-- error propagation
-- no panic
- keyManager: persist, import, export, initialize and (re)set keyring
- no global public "singleton" keyring, instead interface via keyManager
- keys test
- KeyStore interface, DB and File store implementations

ethcrypto/keyring.go

@@ -0,0 +1,118 @@
+package ethcrypto
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go/ethutil"
+	"io/ioutil"
+	"strings"
+)
+
+type KeyRing struct {
+	keys []*KeyPair
+}
+
+func NewKeyRing() *KeyRing {
+	return &KeyRing{}
+}
+
+func (k *KeyRing) AddKeyPair(keyPair *KeyPair) {
+	k.keys = append(k.keys, keyPair)
+}
+
+func (k *KeyRing) GetKeyPair(i int) *KeyPair {
+	if len(k.keys) > i {
+		return k.keys[i]
+	}
+
+	return nil
+}
+
+func (k *KeyRing) Empty() bool {
+	return k.Len() == 0
+}
+
+func (k *KeyRing) Len() int {
+	return len(k.keys)
+}
+
+func (k *KeyRing) Each(f func(*KeyPair)) {
+	for _, keyPair := range k.keys {
+		f(keyPair)
+	}
+}
+
+func NewGeneratedKeyRing(len int) *KeyRing {
+	keyRing := NewKeyRing()
+	for i := 0; i < len; i++ {
+		keyRing.AddKeyPair(GenerateNewKeyPair())
+	}
+	return keyRing
+}
+
+func NewKeyRingFromFile(secfile string) (*KeyRing, error) {
+	var content []byte
+	var err error
+	content, err = ioutil.ReadFile(secfile)
+	if err != nil {
+		return nil, err
+	}
+	keyRing, err := NewKeyRingFromString(string(content))
+	if err != nil {
+		return nil, err
+	}
+	return keyRing, nil
+}
+
+func NewKeyRingFromString(content string) (*KeyRing, error) {
+	secretStrings := strings.Split(content, "\n")
+	var secrets [][]byte
+	for _, secretString := range secretStrings {
+		secret := secretString
+		words := strings.Split(secretString, " ")
+		if len(words) == 24 {
+			secret = MnemonicDecode(words)
+		} else if len(words) != 1 {
+			return nil, fmt.Errorf("Unrecognised key format")
+		}
+		secrets = append(secrets, ethutil.Hex2Bytes(secret))
+	}
+	return NewKeyRingFromSecrets(secrets)
+}
+
+func NewKeyRingFromSecrets(secs [][]byte) (*KeyRing, error) {
+	keyRing := NewKeyRing()
+	for _, sec := range secs {
+		keyPair, err := NewKeyPairFromSec(sec)
+		if err != nil {
+			return nil, err
+		}
+		keyRing.AddKeyPair(keyPair)
+	}
+	return keyRing, nil
+}
+
+func NewKeyRingFromBytes(data []byte) (*KeyRing, error) {
+	var secrets [][]byte
+	it := ethutil.NewValueFromBytes(data).NewIterator()
+	for it.Next() {
+		secret := it.Value().Bytes()
+		secrets = append(secrets, secret)
+	}
+	keyRing, err := NewKeyRingFromSecrets(secrets)
+	if err != nil {
+		return nil, err
+	}
+	return keyRing, nil
+}
+
+func (k *KeyRing) RlpEncode() []byte {
+	return k.RlpValue().Encode()
+}
+
+func (k *KeyRing) RlpValue() *ethutil.Value {
+	v := ethutil.EmptyValue()
+	k.Each(func(keyPair *KeyPair) {
+		v.Append(keyPair.RlpValue())
+	})
+	return v
+}