102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
package ed25519vm
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import (
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"encoding/json"
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"errors"
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"fmt"
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"github.com/MetaMask/go-did-it"
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"github.com/MetaMask/go-did-it/crypto"
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"github.com/MetaMask/go-did-it/crypto/ed25519"
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)
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// Specification: https://w3c.github.io/cg-reports/credentials/CG-FINAL-di-eddsa-2020-20220724/
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const (
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JsonLdContext2020 = "https://w3id.org/security/suites/ed25519-2020/v1"
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Type2020 = "Ed25519VerificationKey2020"
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)
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var _ did.VerificationMethodSignature = &VerificationKey2020{}
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type VerificationKey2020 struct {
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id string
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pubkey ed25519.PublicKey
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controller string
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}
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func NewVerificationKey2020(id string, pubkey ed25519.PublicKey, controller did.DID) *VerificationKey2020 {
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return &VerificationKey2020{
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id: id,
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pubkey: pubkey,
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controller: controller.String(),
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}
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}
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func (v VerificationKey2020) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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ID string `json:"id"`
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Type string `json:"type"`
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Controller string `json:"controller"`
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PublicKeyMultibase string `json:"publicKeyMultibase"`
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}{
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ID: v.ID(),
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Type: v.Type(),
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Controller: v.Controller(),
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PublicKeyMultibase: v.pubkey.ToPublicKeyMultibase(),
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})
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}
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func (v *VerificationKey2020) UnmarshalJSON(bytes []byte) error {
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aux := struct {
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ID string `json:"id"`
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Type string `json:"type"`
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Controller string `json:"controller"`
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PublicKeyMultibase string `json:"publicKeyMultibase"`
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}{}
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err := json.Unmarshal(bytes, &aux)
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if err != nil {
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return err
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}
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if aux.Type != v.Type() {
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return errors.New("invalid type")
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}
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v.id = aux.ID
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if len(v.id) == 0 {
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return errors.New("invalid id")
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}
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v.pubkey, err = ed25519.PublicKeyFromPublicKeyMultibase(aux.PublicKeyMultibase)
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if err != nil {
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return fmt.Errorf("invalid publicKeyMultibase: %w", err)
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}
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v.controller = aux.Controller
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if !did.HasValidDIDSyntax(v.controller) {
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return errors.New("invalid controller")
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}
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return nil
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}
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func (v VerificationKey2020) ID() string {
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return v.id
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}
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func (v VerificationKey2020) Type() string {
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return Type2020
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}
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func (v VerificationKey2020) Controller() string {
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return v.controller
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}
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func (v VerificationKey2020) JsonLdContext() string {
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return JsonLdContext2020
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}
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func (v VerificationKey2020) VerifyBytes(data []byte, sig []byte, opts ...crypto.SigningOption) (bool, error) {
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return v.pubkey.VerifyBytes(data, sig, opts...), nil
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}
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func (v VerificationKey2020) VerifyASN1(data []byte, sig []byte, opts ...crypto.SigningOption) (bool, error) {
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return v.pubkey.VerifyASN1(data, sig, opts...), nil
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}
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