Esempio n. 1
0
func (cf *Cifrador) Decrypt(desencriptar []byte) []byte {
	res := desencriptar
	rckey := cf.rckey[:]
	crc4, err := rc4.NewCipher(rckey)
	if err != nil {
		panic(err)
	}
	crc4.XORKeyStream(res, res)
	salsa20.XORKeyStream(res, res, cf.nonce, &cf.key)
	return res
}
Esempio n. 2
0
func load(r io.Reader, key []byte, password string) (*DB, error) {
	l := &loader{r: r, key: key, password: password, db: &DB{}}

	err := l.readFixedHeader()
	if err != nil {
		return nil, err
	}

	err = l.readDynamicHeader()
	if err != nil {
		return nil, err
	}

	err = l.readPayload()
	if err != nil {
		return nil, err
	}

	kpf := KeePassFile{}
	err = xml.Unmarshal(l.body, &kpf)
	if err != nil {
		return nil, err
	}
	l.db.KeePassFile = kpf

	err = l.removeProtect(false)
	if err != nil {
		return nil, err
	}

	// go's salsa20 library has no way to specify the offset (8-bytes of nonce)
	// into the stream so the entire stream needs to be decrypted via a single
	// operation.
	psk := sha256.Sum256(l.protectedStreamKey[:])
	salsa20.XORKeyStream(l.pwStream, l.pwStream, protectedIV, &psk)

	err = l.removeProtect(true)
	if err != nil {
		return nil, err
	}

	return l.db, nil
}