example.go

func NewLegacyCryptoModule(cipherKey string, randomIv bool) (CryptorModule, error) {
	legacyCryptoAlgorithm, e := NewLegacyCryptoAlgorithm(cipherKey, randomIv)
	if e != nil {
		return nil, e
	}
	aesCBCCryptoAlgorithm, e := NewAesCBCCryptoAlgorithm(cipherKey)

	if e != nil {
		return nil, e
	}

	decryptors := []CryptoAlgorithm{aesCBCCryptoAlgorithm}
	return NewCryptoModule(legacyCryptoAlgorithm, decryptors), nil
}

func NewDefaultCryptoModule(cipherKey string, randomIv bool) (CryptorModule, error) {
	aesCBCCryptoAlgorithm, e := NewAesCBCCryptoAlgorithm(cipherKey)
	if e != nil {
		return nil, e
	}

	legacyCryptoAlgorithm, e := NewLegacyCryptoAlgorithm(cipherKey, randomIv)
	if e != nil {
		return nil, e
	}

	decryptors := []CryptoAlgorithm{legacyCryptoAlgorithm}
	return NewCryptoModule(aesCBCCryptoAlgorithm, decryptors), nil
}

func NewCryptoModule(defaultCryptoAlgorithm CryptoAlgorithm, decryptingAlgorithms []CryptoAlgorithm) CryptorModule {

	decryptors := make(map[string]cryptorWrapper, len(decryptingAlgorithms)+1)
	for _, decryptor := range decryptingAlgorithms {
		decryptors[decryptor.Id()] = NewCryptor(decryptor)
	}
	encryptor := NewCryptor(defaultCryptoAlgorithm)

	decryptors[defaultCryptoAlgorithm.Id()] = encryptor

	return &Module{
		encryptor:  encryptor,
		decryptors: decryptors,
	}
}