+/* --- @rc4_addkey@ --- *
+ *
+ * Arguments: @rc4_ctx *ctx@ = pointer to context to key
+ * @const void *k@ = pointer to key data to use
+ * @size_t sz@ = size of the key data
+ *
+ * Returns: ---
+ *
+ * Use: Mixes key data with an RC4 context. The RC4 context is not
+ * reset before mixing. This may be used to mix new key
+ * material with an existing RC4 context.
+ */
+
+extern void rc4_addkey(rc4_ctx */*ctx*/, const void */*k*/, size_t /*sz*/);
+