72 lines
1.3 KiB
Go
72 lines
1.3 KiB
Go
package jwtutil
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import (
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"crypto/rand"
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"crypto/rsa"
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"os"
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"github.com/lestrrat-go/jwx/v2/jwk"
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"github.com/pkg/errors"
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)
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func LoadOrGenerateKey(path string, defaultKeySize int) (jwk.Key, error) {
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key, err := LoadKey(path)
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if err != nil {
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if !errors.Is(err, os.ErrNotExist) {
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return nil, errors.WithStack(err)
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}
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key, err = GenerateKey(defaultKeySize)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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if err := SaveKey(path, key); err != nil {
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return nil, errors.WithStack(err)
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}
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}
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return key, nil
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}
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func LoadKey(path string) (jwk.Key, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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key, err := jwk.ParseKey(data, jwk.WithPEM(true))
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if err != nil {
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return nil, errors.WithStack(err)
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}
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return key, nil
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}
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func SaveKey(path string, key jwk.Key) error {
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data, err := jwk.Pem(key)
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if err != nil {
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return errors.WithStack(err)
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}
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if err := os.WriteFile(path, data, os.FileMode(0600)); err != nil {
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return errors.WithStack(err)
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}
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return nil
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}
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func GenerateKey(keySize int) (jwk.Key, error) {
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rsaKey, err := rsa.GenerateKey(rand.Reader, keySize)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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key, err := jwk.FromRaw(rsaKey)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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return key, nil
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}
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