add signing key

internal/services/signer/openpgp.go

@@ -0,0 +1,63 @@
+package signer
+
+import (
+	"context"
+	"os"
+
+	"git.front.kjuulh.io/kjuulh/curre"
+	"github.com/ProtonMail/gopenpgp/v2/crypto"
+	"go.uber.org/zap"
+)
+
+type OpenPGP struct {
+	logger         *zap.Logger
+	PrivateKeyRing *crypto.KeyRing
+	config         *OpenPgpConfig
+}
+
+type OpenPgpConfig struct {
+	PrivateKeyFilePath string
+	PrivateKeyPassword string
+}
+
+func NewOpenPGP(logger *zap.Logger, config *OpenPgpConfig) *OpenPGP {
+	return &OpenPGP{
+		logger: logger,
+		config: config,
+	}
+}
+
+func NewOpenPGPApp(openPGP *OpenPGP) curre.Component {
+	return curre.NewFunctionalComponent(&curre.FunctionalComponent{
+		InitFunc: func(fc *curre.FunctionalComponent, ctx context.Context) error {
+
+			content, err := os.ReadFile(openPGP.config.PrivateKeyFilePath)
+			if err != nil {
+				return err
+			}
+			privateKeyObj, err := crypto.NewKeyFromArmored(string(content))
+			if err != nil {
+				return err
+			}
+			unlockedPrivateKeyRing, err := privateKeyObj.Unlock([]byte(openPGP.config.PrivateKeyPassword))
+			if err != nil {
+				return err
+			}
+			privateKeyRing, err := crypto.NewKeyRing(unlockedPrivateKeyRing)
+			if err != nil {
+				return err
+			}
+
+			openPGP.PrivateKeyRing = privateKeyRing
+
+			return nil
+		},
+		StartFunc: func(fc *curre.FunctionalComponent, ctx context.Context) error {
+			return nil
+		},
+		StopFunc: func(fc *curre.FunctionalComponent, ctx context.Context) error {
+			return nil
+		},
+	})
+
+}