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121 lines
2.9 KiB
121 lines
2.9 KiB
package crypto
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import (
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"bytes"
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"fmt"
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. "github.com/tendermint/go-common"
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data "github.com/tendermint/go-data"
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"github.com/tendermint/go-wire"
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)
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// Signature is a part of Txs and consensus Votes.
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type Signature interface {
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Bytes() []byte
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IsZero() bool
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String() string
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Equals(Signature) bool
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}
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// Types of Signature implementations
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const (
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SignatureTypeEd25519 = byte(0x01)
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SignatureTypeSecp256k1 = byte(0x02)
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SignatureNameEd25519 = "ed25519"
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SignatureNameSecp256k1 = "secp256k1"
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)
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var sigMapper data.Mapper
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// register both public key types with go-data (and thus go-wire)
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func init() {
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sigMapper = data.NewMapper(SignatureS{}).
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RegisterInterface(SignatureEd25519{}, SignatureNameEd25519, SignatureTypeEd25519).
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RegisterInterface(SignatureSecp256k1{}, SignatureNameSecp256k1, SignatureTypeSecp256k1)
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}
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// SignatureS add json serialization to Signature
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type SignatureS struct {
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Signature
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}
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func (p SignatureS) MarshalJSON() ([]byte, error) {
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return sigMapper.ToJSON(p.Signature)
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}
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func (p *SignatureS) UnmarshalJSON(data []byte) (err error) {
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parsed, err := sigMapper.FromJSON(data)
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if err == nil {
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p.Signature = parsed.(Signature)
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}
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return
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}
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func (p SignatureS) Empty() bool {
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return p.Signature == nil
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}
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func SignatureFromBytes(sigBytes []byte) (sig Signature, err error) {
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err = wire.ReadBinaryBytes(sigBytes, &sig)
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return
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}
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//-------------------------------------
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// Implements Signature
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type SignatureEd25519 [64]byte
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func (sig SignatureEd25519) Bytes() []byte {
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return wire.BinaryBytes(struct{ Signature }{sig})
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}
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func (sig SignatureEd25519) IsZero() bool { return len(sig) == 0 }
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func (sig SignatureEd25519) String() string { return fmt.Sprintf("/%X.../", Fingerprint(sig[:])) }
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func (sig SignatureEd25519) Equals(other Signature) bool {
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if otherEd, ok := other.(SignatureEd25519); ok {
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return bytes.Equal(sig[:], otherEd[:])
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} else {
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return false
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}
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}
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func (p SignatureEd25519) MarshalJSON() ([]byte, error) {
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return data.Encoder.Marshal(p[:])
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}
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func (p *SignatureEd25519) UnmarshalJSON(enc []byte) error {
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var ref []byte
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err := data.Encoder.Unmarshal(&ref, enc)
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copy(p[:], ref)
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return err
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}
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//-------------------------------------
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// Implements Signature
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type SignatureSecp256k1 []byte
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func (sig SignatureSecp256k1) Bytes() []byte {
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return wire.BinaryBytes(struct{ Signature }{sig})
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}
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func (sig SignatureSecp256k1) IsZero() bool { return len(sig) == 0 }
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func (sig SignatureSecp256k1) String() string { return fmt.Sprintf("/%X.../", Fingerprint(sig[:])) }
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func (sig SignatureSecp256k1) Equals(other Signature) bool {
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if otherEd, ok := other.(SignatureSecp256k1); ok {
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return bytes.Equal(sig[:], otherEd[:])
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} else {
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return false
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}
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}
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func (p SignatureSecp256k1) MarshalJSON() ([]byte, error) {
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return data.Encoder.Marshal(p)
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}
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func (p *SignatureSecp256k1) UnmarshalJSON(enc []byte) error {
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return data.Encoder.Unmarshal((*[]byte)(p), enc)
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}
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