crypto

type Algo int

type Algos map[string]Algo

type Hash224 [Hash224Size]byte

type Hash256 [Hash256Size]byte

type Hasher interface {
	// Hash returns calculates hash checksum.
	Hash() (Hash256, error)
}

type PrivateKey interface {
	// Embedded Signer interface.
	Signer

	// Algo returns the private key Algo.
	Algo() Algo

	// PublicKey returns the public key paired with this private key.
	PublicKey() PublicKey
}

type PublicKey interface {
	// Embedded equaler interface.
	equal.Equaler

	// Algo returns the public key Algo.
	Algo() Algo

	// Base64 encodes a public key to base64 string.
	Base64() (string, error)

	// Decode sets decoded data from protobuf message.
	Decode(*pb.PublicKey) error

	// Encode converts data to protobuf message.
	Encode() (*pb.PublicKey, error)

	// Equals checks whether two public keys are the same.
	Equals(PublicKey) bool

	// Hash224 calculates SHA224 checksum
	// over SHA256 checksum over public key value.
	Hash224() (Hash224, error)

	// Marshal implements marshaler interface for types
	// that can marshal themselves into bytes.
	Marshal() ([]byte, error)

	// MarshalJSON implements marshaler interface for types
	// that can marshal themselves into valid JSON.
	MarshalJSON() ([]byte, error)

	// String implements stringer interface for types
	// that can converts themselves to string format.
	String() string

	// Unmarshal implements unmarshaler interface for types
	// that can unmarshal bytes of themselves.
	Unmarshal([]byte) error

	// UnmarshalJSON implements unmarshaler interface for types
	// that can unmarshal a JSON description of themselves.
	UnmarshalJSON([]byte) error

	// Verify verifies signable object.
	Verify(Signable) (bool, error)
}

type Signable interface {
	// Embedded Hasher interface.
	Hasher

	// GetSignature returns the signature.
	GetSignature() Signature

	// SetSignature sets the sign to the particular property.
	SetSignature(Signature)

	// SetPublicKey sets the public key to the particular property.
	SetPublicKey(PublicKey)
}

type SignableStub struct {
	Blob  []byte
	Sign  Signature
	PbKey PublicKey
}

type Signature interface {
	// Embedded equaler interface.
	equal.Equaler

	// Decode sets decoded data from protobuf message.
	Decode(*pb.Signature)

	// Encode converts data to protobuf message.
	Encode() *pb.Signature

	// Equals checks whether two signatures are the same.
	Equals(Signature) bool

	// Marshal implements marshaler interface for types
	// that can marshal themselves into bytes.
	Marshal() ([]byte, error)

	// MarshalJSON implements marshaler interface for types
	// that can marshal themselves into valid JSON.
	MarshalJSON() ([]byte, error)

	// String implements stringer interface for types
	// that can converts themselves to string format.
	String() string

	// Unmarshal implements unmarshaler interface for types
	// that can unmarshal bytes of themselves.
	Unmarshal(b []byte) error

	// UnmarshalJSON implements unmarshaler interface for types
	// that can unmarshal a JSON description of themselves.
	UnmarshalJSON([]byte) error
}

type Signer interface {
	// Sign signs signable object.
	Sign(Signable) (Signature, error)
}