diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h
index fda097e..067c242 100644
--- a/include/crypto/public_key.h
+++ b/include/crypto/public_key.h
@@ -40,6 +40,20 @@
 extern const char *const pkey_id_type_name[PKEY_ID_TYPE__LAST];
 
 /*
+ * The use to which an asymmetric key is being put.
+ */
+enum key_being_used_for {
+	VERIFYING_MODULE_SIGNATURE,
+	VERIFYING_FIRMWARE_SIGNATURE,
+	VERIFYING_KEXEC_PE_SIGNATURE,
+	VERIFYING_KEY_SIGNATURE,
+	VERIFYING_KEY_SELF_SIGNATURE,
+	VERIFYING_UNSPECIFIED_SIGNATURE,
+	NR__KEY_BEING_USED_FOR
+};
+extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
+
+/*
  * Cryptographic data for the public-key subtype of the asymmetric key type.
  *
  * Note that this may include private part of the key as well as the public