func (m *Message) ToBackend() proto.Message {
msg := proto.Message{
UnixTime: proto.Time(m.Posted),
Sender: &proto.SessionView{
IdentityView: &proto.IdentityView{
ID: proto.UserID(m.SenderID),
Name: m.SenderName,
ServerID: m.ServerID,
ServerEra: m.ServerEra,
},
SessionID: m.SessionID,
},
Content: m.Content,
}
// ignore id parsing errors
_ = msg.ID.FromString(m.ID)
_ = msg.Parent.FromString(m.Parent)
if m.PreviousEditID.Valid {
_ = msg.PreviousEditID.FromString(m.PreviousEditID.String)
}
// other optionals
if m.EncryptionKeyID.Valid {
msg.EncryptionKeyID = m.EncryptionKeyID.String
}
if m.Deleted.Valid {
msg.Deleted = proto.Time(m.Deleted.Time)
}
if m.Edited.Valid {
msg.Edited = proto.Time(m.Edited.Time)
}
return msg
}
func TestGrants(t *testing.T) {
Convey("Grant a capability on a room", t, func() {
kms := security.LocalKMS()
kms.SetMasterKey(make([]byte, security.AES256.KeySize()))
ctx := scope.New()
client := &proto.Client{Agent: &proto.Agent{}}
client.FromRequest(ctx, &http.Request{})
backend := &mock.TestBackend{}
room, err := backend.CreateRoom(ctx, kms, true, "test")
So(err, ShouldBeNil)
rkey, err := room.MessageKey(ctx)
So(err, ShouldBeNil)
mkey := rkey.ManagedKey()
So(kms.DecryptKey(&mkey), ShouldBeNil)
// Sign in as alice and send an encrypted message with aliceSendTime
// as the nonce.
aliceSendTime := time.Now()
msgNonce := []byte(snowflake.NewFromTime(aliceSendTime).String())
aliceKey := &security.ManagedKey{
KeyType: security.AES256,
Plaintext: make([]byte, security.AES256.KeySize()),
}
grant, err := security.GrantSharedSecretCapability(aliceKey, rkey.Nonce(), nil, mkey.Plaintext)
So(err, ShouldBeNil)
alice := mock.TestSession("Alice", "A1", "ip1")
_, err = room.Join(ctx, alice)
So(err, ShouldBeNil)
msg := proto.Message{
ID: snowflake.NewFromTime(aliceSendTime),
UnixTime: proto.Time(aliceSendTime),
Content: "hello",
}
iv, err := base64.URLEncoding.DecodeString(grant.CapabilityID())
So(err, ShouldBeNil)
payload := grant.EncryptedPayload()
So(aliceKey.BlockCrypt(iv, aliceKey.Plaintext, payload, false), ShouldBeNil)
key := &security.ManagedKey{
KeyType: security.AES128,
}
So(json.Unmarshal(aliceKey.Unpad(payload), &key.Plaintext), ShouldBeNil)
digest, ciphertext, err := security.EncryptGCM(
key, msgNonce, []byte(msg.Content), []byte("Alice"))
So(err, ShouldBeNil)
digestStr := base64.URLEncoding.EncodeToString(digest)
cipherStr := base64.URLEncoding.EncodeToString(ciphertext)
msg.Content = digestStr + "/" + cipherStr
_, err = room.Send(ctx, alice, msg)
So(err, ShouldBeNil)
// Now sign in as bob and decrypt the message.
bobKey := &security.ManagedKey{
KeyType: security.AES256,
Plaintext: make([]byte, security.AES256.KeySize()),
}
//bobKey.Plaintext[0] = 1
grant, err = security.GrantSharedSecretCapability(bobKey, rkey.Nonce(), nil, mkey.Plaintext)
So(err, ShouldBeNil)
iv, err = base64.URLEncoding.DecodeString(grant.CapabilityID())
So(err, ShouldBeNil)
payload = grant.EncryptedPayload()
So(bobKey.BlockCrypt(iv, bobKey.Plaintext, payload, false), ShouldBeNil)
key = &security.ManagedKey{
KeyType: security.AES128,
}
So(json.Unmarshal(bobKey.Unpad(payload), &key.Plaintext), ShouldBeNil)
bob := mock.TestSession("Bob", "B1", "ip2")
_, err = room.Join(ctx, bob)
So(err, ShouldBeNil)
log, err := room.Latest(ctx, 1, 0)
So(err, ShouldBeNil)
So(len(log), ShouldEqual, 1)
msg = log[0]
parts := strings.Split(msg.Content, "/")
So(len(parts), ShouldEqual, 2)
digest, err = base64.URLEncoding.DecodeString(parts[0])
So(err, ShouldBeNil)
ciphertext, err = base64.URLEncoding.DecodeString(parts[1])
So(err, ShouldBeNil)
plaintext, err := security.DecryptGCM(key, msgNonce, digest, ciphertext, []byte("Alice"))
So(err, ShouldBeNil)
So(string(plaintext), ShouldEqual, "hello")
})
}