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-rw-r--r--net/rxrpc/ar-key.c32
1 files changed, 29 insertions, 3 deletions
diff --git a/net/rxrpc/ar-key.c b/net/rxrpc/ar-key.c
index 7e049ff6ae60..9a8ff684da79 100644
--- a/net/rxrpc/ar-key.c
+++ b/net/rxrpc/ar-key.c
@@ -15,7 +15,7 @@
#include <linux/module.h>
#include <linux/net.h>
#include <linux/skbuff.h>
-#include <linux/key.h>
+#include <linux/key-type.h>
#include <linux/crypto.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
@@ -40,7 +40,6 @@ struct key_type key_type_rxrpc = {
.destroy = rxrpc_destroy,
.describe = rxrpc_describe,
};
-
EXPORT_SYMBOL(key_type_rxrpc);
/*
@@ -330,5 +329,32 @@ error:
_leave(" = -ENOMEM [ins %d]", ret);
return -ENOMEM;
}
-
EXPORT_SYMBOL(rxrpc_get_server_data_key);
+
+/**
+ * rxrpc_get_null_key - Generate a null RxRPC key
+ * @keyname: The name to give the key.
+ *
+ * Generate a null RxRPC key that can be used to indicate anonymous security is
+ * required for a particular domain.
+ */
+struct key *rxrpc_get_null_key(const char *keyname)
+{
+ struct key *key;
+ int ret;
+
+ key = key_alloc(&key_type_rxrpc, keyname, 0, 0, current,
+ KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA);
+ if (IS_ERR(key))
+ return key;
+
+ ret = key_instantiate_and_link(key, NULL, 0, NULL, NULL);
+ if (ret < 0) {
+ key_revoke(key);
+ key_put(key);
+ return ERR_PTR(ret);
+ }
+
+ return key;
+}
+EXPORT_SYMBOL(rxrpc_get_null_key);

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