/
ecdsa-private.go
81 lines (69 loc) · 1.85 KB
/
ecdsa-private.go
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/*
© 2022–present Harald Rudell <harald.rudell@gmail.com> (https://haraldrudell.github.io/haraldrudell/)
ISC License
*/
package parlca
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
"encoding/pem"
"github.com/haraldrudell/parl"
"github.com/haraldrudell/parl/perrors"
)
type EcdsaPrivateKey struct {
ecdsa.PrivateKey
}
func NewEcdsa() (privateKey parl.PrivateKey, err error) {
var ecdsaPrivateKey *ecdsa.PrivateKey
// P-256 is 128 bit security
if ecdsaPrivateKey, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader); perrors.IsPF(&err, "ecdsa.GenerateKey %w", err) {
return
}
privateKey = &EcdsaPrivateKey{PrivateKey: *ecdsaPrivateKey}
return
}
func (key *EcdsaPrivateKey) Algo() (algo x509.PublicKeyAlgorithm) {
return x509.ECDSA
}
func (key *EcdsaPrivateKey) DER() (bytes parl.PrivateKeyDer, err error) {
if bytes, err = x509.MarshalPKCS8PrivateKey(&key.PrivateKey); err != nil {
err = perrors.Errorf("x509.MarshalPKCS8PrivateKey: '%w'", err)
}
return
}
func (key *EcdsaPrivateKey) DERe() (privateKeyDer parl.PrivateKeyDer) {
var err error
if privateKeyDer, err = key.DER(); err != nil {
panic(err)
}
return
}
func (key *EcdsaPrivateKey) PEM() (pemBytes parl.PemBytes, err error) {
block := pem.Block{
Type: pemPrivateKeyType,
}
if block.Bytes, err = key.DER(); err != nil {
return
}
pemBytes = append([]byte(PemText(block.Bytes)), pem.EncodeToMemory(&block)...)
return
}
func (key *EcdsaPrivateKey) PEMe() (pemBytes parl.PemBytes) {
var err error
if pemBytes, err = key.PEM(); err != nil {
panic(err)
}
return
}
func (key *EcdsaPrivateKey) PublicKey() (publicKey parl.PublicKey) {
return &EcdsaPublicKey{PublicKey: key.PrivateKey.PublicKey}
}
func (key *EcdsaPrivateKey) Validate() (err error) {
if key.PrivateKey.D == nil {
err = perrors.New("Uninitialized ecdsa private key")
return
}
return
}