/
ecdsakey.go
102 lines (84 loc) · 2.39 KB
/
ecdsakey.go
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package sw
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/sha256"
"crypto/x509"
"errors"
"fmt"
"github.com/hello2mao/go-common/stable/csp"
)
type ecdsaPrivateKey struct {
privKey *ecdsa.PrivateKey
}
// Bytes converts this key to its byte representation,
// if this operation is allowed.
func (k *ecdsaPrivateKey) Bytes() ([]byte, error) {
return nil, errors.New("Not supported.")
}
// SKI returns the subject key identifier of this key.
func (k *ecdsaPrivateKey) SKI() []byte {
if k.privKey == nil {
return nil
}
// Marshall the public key
raw := elliptic.Marshal(k.privKey.Curve, k.privKey.PublicKey.X, k.privKey.PublicKey.Y)
// Hash it
hash := sha256.New()
hash.Write(raw)
return hash.Sum(nil)
}
// Symmetric returns true if this key is a symmetric key,
// false if this key is asymmetric
func (k *ecdsaPrivateKey) Symmetric() bool {
return false
}
// Private returns true if this key is a private key,
// false otherwise.
func (k *ecdsaPrivateKey) Private() bool {
return true
}
// PublicKey returns the corresponding public key part of an asymmetric public/private key pair.
// This method returns an error in symmetric key schemes.
func (k *ecdsaPrivateKey) PublicKey() (csp.Key, error) {
return &ecdsaPublicKey{&k.privKey.PublicKey}, nil
}
type ecdsaPublicKey struct {
pubKey *ecdsa.PublicKey
}
// Bytes converts this key to its byte representation,
// if this operation is allowed.
func (k *ecdsaPublicKey) Bytes() (raw []byte, err error) {
raw, err = x509.MarshalPKIXPublicKey(k.pubKey)
if err != nil {
return nil, fmt.Errorf("Failed marshalling key [%s]", err)
}
return
}
// SKI returns the subject key identifier of this key.
func (k *ecdsaPublicKey) SKI() []byte {
if k.pubKey == nil {
return nil
}
// Marshall the public key
raw := elliptic.Marshal(k.pubKey.Curve, k.pubKey.X, k.pubKey.Y)
// Hash it
hash := sha256.New()
hash.Write(raw)
return hash.Sum(nil)
}
// Symmetric returns true if this key is a symmetric key,
// false if this key is asymmetric
func (k *ecdsaPublicKey) Symmetric() bool {
return false
}
// Private returns true if this key is a private key,
// false otherwise.
func (k *ecdsaPublicKey) Private() bool {
return false
}
// PublicKey returns the corresponding public key part of an asymmetric public/private key pair.
// This method returns an error in symmetric key schemes.
func (k *ecdsaPublicKey) PublicKey() (csp.Key, error) {
return k, nil
}