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