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90 lines
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package crypto
import (
"fmt"
"crypto/subtle"
. "github.com/tendermint/tendermint/libs/common"
)
func SignatureFromBytes(pubKeyBytes []byte) (pubKey Signature, err error) {
err = cdc.UnmarshalBinaryBare(pubKeyBytes, &pubKey)
return
}
//----------------------------------------
type Signature interface {
Bytes() []byte
IsZero() bool
Equals(Signature) bool
}
//-------------------------------------
var _ Signature = SignatureEd25519{}
const SignatureEd25519Size = 64
// Implements Signature
type SignatureEd25519 [SignatureEd25519Size]byte
func (sig SignatureEd25519) Bytes() []byte {
bz, err := cdc.MarshalBinaryBare(sig)
if err != nil {
panic(err)
}
return bz
}
func (sig SignatureEd25519) IsZero() bool { return len(sig) == 0 }
func (sig SignatureEd25519) String() string { return fmt.Sprintf("/%X.../", Fingerprint(sig[:])) }
func (sig SignatureEd25519) Equals(other Signature) bool {
if otherEd, ok := other.(SignatureEd25519); ok {
return subtle.ConstantTimeCompare(sig[:], otherEd[:]) == 1
} else {
return false
}
}
func SignatureEd25519FromBytes(data []byte) Signature {
var sig SignatureEd25519
copy(sig[:], data)
return sig
}
//-------------------------------------
var _ Signature = SignatureSecp256k1{}
// Implements Signature
type SignatureSecp256k1 []byte
func (sig SignatureSecp256k1) Bytes() []byte {
bz, err := cdc.MarshalBinaryBare(sig)
if err != nil {
panic(err)
}
return bz
}
func (sig SignatureSecp256k1) IsZero() bool { return len(sig) == 0 }
func (sig SignatureSecp256k1) String() string { return fmt.Sprintf("/%X.../", Fingerprint(sig[:])) }
func (sig SignatureSecp256k1) Equals(other Signature) bool {
if otherSecp, ok := other.(SignatureSecp256k1); ok {
return subtle.ConstantTimeCompare(sig[:], otherSecp[:]) == 1
} else {
return false
}
}
func SignatureSecp256k1FromBytes(data []byte) Signature {
sig := make(SignatureSecp256k1, len(data))
copy(sig[:], data)
return sig
}