rsa: Add iterator for rsa keys

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/crypto/rsa.c b/crypto/rsa.c
index 4e2d463b54..2eeb9984b1 100644
--- a/crypto/rsa.c
+++ b/crypto/rsa.c
@@ -446,6 +446,15 @@ void rsa_key_free(struct rsa_public_key *key)
 
 static LIST_HEAD(rsa_keys);
 
+const struct rsa_public_key *rsa_key_next(const struct rsa_public_key *prev)
+{
+	prev = list_prepare_entry(prev, &rsa_keys, list);
+	list_for_each_entry_continue(prev, &rsa_keys, list)
+		return prev;
+
+	return NULL;
+}
+
 const struct rsa_public_key *rsa_get_key(const char *name)
 {
 	const struct rsa_public_key *key;