Updated whisper messages to new crypto api + added tests

1 files changed, 12 insertions, 6 deletions

diff --git a/whisper/message.go b/whisper/message.go
index 408b9f7df..8ce5d880b 100644
--- a/whisper/message.go
+++ b/whisper/message.go
@@ -1,6 +1,7 @@
 package whisper
 
 import (
+	"crypto/ecdsa"
 	"time"
 
 	"github.com/ethereum/go-ethereum/crypto"
@@ -20,13 +21,17 @@ func (self *Message) hash() []byte {
 	return crypto.Sha3(append([]byte{self.Flags}, self.Payload...))
 }
 
-func (self *Message) sign(key []byte) (err error) {
+func (self *Message) sign(key *ecdsa.PrivateKey) (err error) {
 	self.Flags = 1
 	self.Signature, err = crypto.Sign(self.hash(), key)
 	return
 }
 
-func (self *Message) Encrypt(from, to []byte) (err error) {
+func (self *Message) Recover() *ecdsa.PublicKey {
+	return crypto.SigToPub(self.hash(), self.Signature)
+}
+
+func (self *Message) Encrypt(from *ecdsa.PrivateKey, to *ecdsa.PublicKey) (err error) {
 	err = self.sign(from)
 	if err != nil {
 		return err
@@ -45,13 +50,14 @@ func (self *Message) Bytes() []byte {
 }
 
 type Opts struct {
-	From, To []byte // private(sender), public(receiver) key
-	Ttl      time.Duration
-	Topics   [][]byte
+	From   *ecdsa.PrivateKey
+	To     *ecdsa.PublicKey
+	Ttl    time.Duration
+	Topics [][]byte
 }
 
 func (self *Message) Seal(pow time.Duration, opts Opts) (*Envelope, error) {
-	if len(opts.To) > 0 && len(opts.From) > 0 {
+	if opts.To != nil && opts.From != nil {
 		if err := self.Encrypt(opts.From, opts.To); err != nil {
 			return nil, err
 		}