crypto_secretbox_xchacha20poly1305.h in rbnacl-libsodium-1.0.15

- old
+ new

@@ -1,9 +1,10 @@
 #ifndef crypto_secretbox_xchacha20poly1305_H
 #define crypto_secretbox_xchacha20poly1305_H
 
 #include <stddef.h>
+#include "crypto_stream_xchacha20.h"
 #include "export.h"
 
 #ifdef __cplusplus
 # ifdef __GNUC__
 #  pragma GCC diagnostic ignored "-Wlong-long"
@@ -20,9 +21,14 @@
 size_t crypto_secretbox_xchacha20poly1305_noncebytes(void);
 
 #define crypto_secretbox_xchacha20poly1305_MACBYTES 16U
 SODIUM_EXPORT
 size_t crypto_secretbox_xchacha20poly1305_macbytes(void);
+
+#define crypto_secretbox_xchacha20poly1305_MESSAGEBYTES_MAX \
+    (crypto_stream_xchacha20_MESSAGEBYTES_MAX - crypto_secretbox_xchacha20poly1305_MACBYTES)
+SODIUM_EXPORT
+size_t crypto_secretbox_xchacha20poly1305_messagebytes_max(void);
 
 SODIUM_EXPORT
 int crypto_secretbox_xchacha20poly1305_easy(unsigned char *c,
                                             const unsigned char *m,
                                             unsigned long long mlen,