70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package pkilib
|
|
|
|
import (
|
|
"crypto"
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"errors"
|
|
)
|
|
|
|
const (
|
|
PemLabelEcdsa = "EC PRIVATE KEY"
|
|
)
|
|
|
|
type (
|
|
// This type handles the function calls to the ecdsa private key by
|
|
// implementing the interface.
|
|
EcdsaPrivateKey struct {
|
|
private_key *ecdsa.PrivateKey
|
|
}
|
|
|
|
EcdsaPublicKey struct {
|
|
public_key *ecdsa.PublicKey
|
|
}
|
|
)
|
|
|
|
// generate a new ecdsa private key
|
|
func NewPrivateKeyEcdsa(curve elliptic.Curve) (*EcdsaPrivateKey, error) {
|
|
key, err := ecdsa.GenerateKey(curve, rand.Reader)
|
|
if err != nil { return nil, err }
|
|
return &EcdsaPrivateKey{key}, nil
|
|
}
|
|
|
|
// load the private key from the raw data
|
|
func LoadPrivateKeyEcdsa(raw []byte) (*EcdsaPrivateKey, error) {
|
|
key, err := x509.ParseECPrivateKey(raw)
|
|
if err != nil { return nil, err }
|
|
return &EcdsaPrivateKey{key}, nil
|
|
}
|
|
|
|
// derive a public key from the private key
|
|
func (pr EcdsaPrivateKey) Public() PublicKey {
|
|
return &EcdsaPublicKey{pr.private_key.Public().(*ecdsa.PublicKey)}
|
|
}
|
|
|
|
// sign a message with the private key
|
|
func (pr EcdsaPrivateKey) Sign(message []byte) ([]byte, error) {
|
|
return make([]byte, 0), errors.New("not implemented yet!")
|
|
}
|
|
|
|
// get the private key
|
|
func (pr EcdsaPrivateKey) privateKey() crypto.PrivateKey {
|
|
return pr.private_key
|
|
}
|
|
|
|
// implement Pemmer interface
|
|
func (pr EcdsaPrivateKey) MarshalPem() (marshalledPemBlock, error) {
|
|
asn1, err := x509.MarshalECPrivateKey(pr.private_key)
|
|
if err != nil { return nil, err }
|
|
pem_block := pem.Block{Type: PemLabelEcdsa, Bytes: asn1}
|
|
return pem.EncodeToMemory(&pem_block), nil
|
|
}
|
|
|
|
// verify a message using the ecdsa public key
|
|
func (pu *EcdsaPublicKey) Verify(message []byte, signature []byte) (bool, error) {
|
|
return false, errors.New("not implemented yet!")
|
|
}
|