jwks_item_key_oct: New function to retrieve octect data

Signed-off-by: Ben Collins <[email protected]>

include/jwt.h

@@ -1295,6 +1295,21 @@ jwk_key_op_t jwks_item_key_ops(const jwk_item_t *item);
 JWT_EXPORT
 const char *jwks_item_pem(const jwk_item_t *item);
 
+/**
+ * @brief Retrieve binary octet data of a key
+ *
+ * Only valid for JWT_KEY_TYPE_OCT.
+ *
+ * @param item A JWK Item
+ * @param buf Pointer to a pointer buffer
+ * @param len Pointer to a length
+ * @return 0 on success. @p buf will point to data of @c len length. Non-zero on
+ *  error.
+ */
+JWT_EXPORT
+int jwks_item_key_oct(const jwk_item_t *item, const unsigned char **buf,
+		      size_t *len);
+
 /**
  * @brief The number of bits in this JWK
  *

libjwt/jwks.c

@@ -258,6 +258,18 @@ int jwks_item_key_bits(const jwk_item_t *item)
 	return item->bits;
 }
 
+int jwks_item_key_oct(const jwk_item_t *item, const unsigned char **buf,
+		      size_t *len)
+{
+	if (!item->oct.key || !item->oct.len)
+		return 1;
+
+	*buf = item->oct.key;
+	*len = item->oct.len;
+
+	return 0;
+}
+
 int jwks_error(const jwk_set_t *jwk_set)
 {
 	return jwk_set->error ? 1 : 0;