#ifndef HEADER_RC4_H
#define HEADER_RC4_H
+#include <openssl/opensslconf.h> /* OPENSSL_NO_RC4, RC4_INT */
#ifdef OPENSSL_NO_RC4
#error RC4 is disabled.
#endif
-#include <openssl/opensslconf.h> /* RC4_INT */
+#include <stddef.h>
#ifdef __cplusplus
extern "C" {
const char *RC4_options(void);
void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data);
-void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
+void RC4(RC4_KEY *key, size_t len, const unsigned char *indata,
unsigned char *outdata);
#ifdef __cplusplus