KEYS: Add a key type op to permit the key description to be vetted

[pandora-kernel.git] / net / rxrpc / ar-key.c

diff --git a/net/rxrpc/ar-key.c b/net/rxrpc/ar-key.c
index d763793..43ea7de 100644 (file)
--- a/net/rxrpc/ar-key.c
+++ b/net/rxrpc/ar-key.c
@@ -25,6 +25,7 @@
 #include <keys/user-type.h>
 #include "ar-internal.h"
 
+static int rxrpc_vet_description_s(const char *);
 static int rxrpc_instantiate(struct key *, const void *, size_t);
 static int rxrpc_instantiate_s(struct key *, const void *, size_t);
 static void rxrpc_destroy(struct key *);
@@ -52,12 +53,30 @@ EXPORT_SYMBOL(key_type_rxrpc);
  */
 struct key_type key_type_rxrpc_s = {
        .name           = "rxrpc_s",
+       .vet_description = rxrpc_vet_description_s,
        .instantiate    = rxrpc_instantiate_s,
        .match          = user_match,
        .destroy        = rxrpc_destroy_s,
        .describe       = rxrpc_describe,
 };
 
+/*
+ * Vet the description for an RxRPC server key
+ */
+static int rxrpc_vet_description_s(const char *desc)
+{
+       unsigned long num;
+       char *p;
+
+       num = simple_strtoul(desc, &p, 10);
+       if (*p != ':' || num > 65535)
+               return -EINVAL;
+       num = simple_strtoul(p + 1, &p, 10);
+       if (*p || num < 1 || num > 255)
+               return -EINVAL;
+       return 0;
+}
+
 /*
  * parse an RxKAD type XDR format token
  * - the caller guarantees we have at least 4 words