keystorev4

type AES128CTRParams struct {
	IV JsonBytes `json:"iv"`
}

type ChecksumParams interface {
	// Computes the checksum
	Checksum(decryptionKey []byte, cipherMessage []byte) ([]byte, error)
	Function() string
}

type CipherParams interface {
	Decipher(cipherMsg []byte, decryptionKey []byte) (secret []byte, err error)
	Encipher(decryptionKey []byte, secret []byte) (cipherMsg []byte, err error)
	Function() string
}

type HashChecksumParams struct {
	Hasher func() hash.Hash `json:"-"`
	// Name is already declared in the Function field
	Name string `json:"-"`
}

type JsonBytes []byte

type KDFParams interface {
	DecryptionKey(normedPassphrase []byte) ([]byte, error)
	Function() string
}

type Keystore struct {
	Crypto      KeystoreCrypto `json:"crypto"`
	Description string         `json:"description,omitempty"`
	Pubkey      JsonBytes      `json:"pubkey,omitempty"`
	// Path used in HD derivation.
	// EIP-2335 marks this as required field, but it may not exist, thus sometimes empty here.
	Path    string    `json:"path"`
	UUID    uuid.UUID `json:"uuid"`
	Version uint      `json:"version"`
}

type KeystoreChecksumModule struct {
	Function string         `json:"function"`
	Params   ChecksumParams `json:"params"`
	Message  JsonBytes      `json:"message"`
}

type KeystoreCipherModule struct {
	Function string       `json:"function"`
	Params   CipherParams `json:"params"`
	Message  JsonBytes    `json:"message"`
}

type KeystoreCrypto struct {
	KDF      KeystoreKDFModule      `json:"kdf"`
	Checksum KeystoreChecksumModule `json:"checksum"`
	Cipher   KeystoreCipherModule   `json:"cipher"`
}

type KeystoreKDFModule struct {
	Function string    `json:"function"`
	Params   KDFParams `json:"params"`
	Message  JsonBytes `json:"message"`
}

type PBKDF2Params struct {
	Dklen int       `json:"dklen"`
	C     int       `json:"c"`
	Prf   string    `json:"prf"`
	Salt  JsonBytes `json:"salt"`
}

type ScryptParams struct {
	Dklen int       `json:"dklen"`
	N     int       `json:"n"`
	P     int       `json:"p"`
	R     int       `json:"r"`
	Salt  JsonBytes `json:"salt"`
}