Exemple #1
0
func (p *KeybasePacket) unmarshalBinary(data []byte) error {
	ch := codecHandle()
	if err := MsgpackDecodeAll(data, ch, p); err != nil {
		return err
	}

	if err := p.unpackBody(ch); err != nil {
		return err
	}

	// Test for nonstandard msgpack data (which could be maliciously crafted)
	// by re-encoding and making sure we get the same thing.
	// https://github.com/keybase/client/issues/423
	//
	// Ideally this should be done at a lower level, like MsgpackDecodeAll, but
	// our msgpack library doesn't sort maps the way we expect. See
	// https://github.com/ugorji/go/issues/103
	var reencoded []byte
	if err := codec.NewEncoderBytes(&reencoded, ch).Encode(p); err != nil {
		return err
	}

	if reencoded, err := p.Encode(); err != nil {
		return err
	} else if !bytes.Equal(reencoded, data) {
		return FishyMsgpackError{data, reencoded}
	}

	return p.checkHash()
}
Exemple #2
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func (p *KeybasePacket) unpackBody(ch *codec.MsgpackHandle) error {
	var body interface{}

	switch p.Tag {
	case TagP3skb:
		// XXX this function should get a G passed into it, but to do that requires
		// a lot of changes upstream.
		body = NewSKB(G)
	case TagSignature:
		body = &NaclSigInfo{}
	case TagEncryption:
		body = &NaclEncryptionInfo{}
	default:
		return fmt.Errorf("Unknown packet tag: %d", p.Tag)
	}
	var encoded []byte
	if err := codec.NewEncoderBytes(&encoded, ch).Encode(p.Body); err != nil {
		return err
	}
	if err := MsgpackDecodeAll(encoded, ch, body); err != nil {
		return err
	}
	p.Body = body

	return nil
}
Exemple #3
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func (e *framedMsgpackEncoder) encodeFrame(i interface{}) ([]byte, error) {
	enc := codec.NewEncoderBytes(&[]byte{}, e.handle)
	content, err := e.encodeToBytes(enc, i)
	if err != nil {
		return nil, err
	}
	length, err := e.encodeToBytes(enc, len(content))
	if err != nil {
		return nil, err
	}
	return append(length, content...), nil
}
Exemple #4
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func (c *Conn) encryptOutgoingMessage(seqno Seqno, buf []byte) (ret []byte, err error) {
	var nonce [24]byte
	var n int

	if n, err = rand.Read(nonce[:]); err != nil {
		return nil, err
	} else if n != 24 {
		return nil, ErrNotEnoughRandomness
	}
	im := innerMsg{
		SenderID:  c.deviceID,
		SessionID: c.sessionID,
		Seqno:     seqno,
		Payload:   buf,
	}
	mh := codec.MsgpackHandle{WriteExt: true}
	var imPacked []byte
	enc := codec.NewEncoderBytes(&imPacked, &mh)
	if err = enc.Encode(im); err != nil {
		return nil, err
	}
	ciphertext := secretbox.Seal(nil, imPacked, &nonce, (*[32]byte)(&c.secret))

	om := outerMsg{
		SenderID:  c.deviceID,
		SessionID: c.sessionID,
		Seqno:     seqno,
		Nonce:     nonce,
		Payload:   ciphertext,
	}
	enc = codec.NewEncoderBytes(&ret, &mh)
	if err = enc.Encode(om); err != nil {
		return nil, err
	}
	return ret, nil
}
Exemple #5
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func isBase64KeybaseV0Sig(s string) bool {
	firstKey := "body"
	dataBytes := len(firstKey) + 1
	b64dataBytes := (dataBytes + 1) * 4 / 3
	if len(s) < b64dataBytes {
		return false
	}
	buf, err := base64.StdEncoding.DecodeString(s[0:b64dataBytes])
	if err != nil {
		return false
	}
	// Packet should be an encoded dictionary of 3 values
	if buf[0] != 0x83 {
		return false
	}
	var mh codec.MsgpackHandle
	var encoded []byte
	codec.NewEncoderBytes(&encoded, &mh).Encode(firstKey)
	return bytes.HasPrefix(buf[1:], encoded)
}
Exemple #6
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// Encode implements the Codec interface for CodecMsgpack
func (c *CodecMsgpack) Encode(obj interface{}) (buf []byte, err error) {
	err = codec.NewEncoderBytes(&buf, c.h).Encode(obj)
	return
}
Exemple #7
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func encodeToBytes(i interface{}) ([]byte, error) {
	var encoded []byte
	err := codec.NewEncoderBytes(&encoded, codecHandle()).Encode(i)
	return encoded, err
}
Exemple #8
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func (s State) Marshal() ([]byte, error) {
	var b []byte
	err := codec.NewEncoderBytes(&b, &codec.MsgpackHandle{WriteExt: true}).Encode(s)
	return b, err
}
Exemple #9
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func (p KeybasePackets) Encode() ([]byte, error) {
	var encoded []byte
	err := codec.NewEncoderBytes(&encoded, codecHandle()).Encode(p)
	return encoded, err
}