1 files changed, 25 insertions, 0 deletions
diff --git a/internal/notify/vapid.go b/internal/notify/vapid.go
new file mode 100644
index 0000000..684bf4d
--- /dev/null
+++ b/internal/notify/vapid.go
@@ -0,0 +1,25 @@
+package notify
+
+import (
+	"encoding/base64"
+
+	webpush "github.com/SherClockHolmes/webpush-go"
+)
+
+// GenerateVAPIDKeys generates a VAPID key pair for web push notifications.
+// Returns the base64url-encoded public and private keys.
+// Note: webpush.GenerateVAPIDKeys returns (privateKey, publicKey) — we swap here.
+func GenerateVAPIDKeys() (publicKey, privateKey string, err error) {
+	privateKey, publicKey, err = webpush.GenerateVAPIDKeys()
+	return
+}
+
+// ValidateVAPIDPublicKey reports whether key is a valid VAPID public key:
+// a base64url-encoded 65-byte uncompressed P-256 point (starts with 0x04).
+func ValidateVAPIDPublicKey(key string) bool {
+	b, err := base64.RawURLEncoding.DecodeString(key)
+	if err != nil {
+		return false
+	}
+	return len(b) == 65 && b[0] == 0x04
+}