GODT-1779: Remove go-imap

internal/user/crypto.go

@@ -0,0 +1,30 @@
+package user
+
+import (
+	"github.com/ProtonMail/gopenpgp/v2/crypto"
+	"gitlab.protontech.ch/go/liteapi"
+)
+
+func unlockKeyRings(user liteapi.User, addresses []liteapi.Address, keyPass []byte) (*crypto.KeyRing, map[string]*crypto.KeyRing, error) {
+	userKR, err := user.Keys.Unlock(keyPass, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	addrKRs := make(map[string]*crypto.KeyRing)
+
+	for _, address := range addresses {
+		if !address.HasKeys.Bool() {
+			continue
+		}
+
+		addrKR, err := address.Keys.Unlock(keyPass, userKR)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		addrKRs[address.ID] = addrKR
+	}
+
+	return userKR, addrKRs, nil
+}