vendor/libsodium/src/libsodium/crypto_stream/chacha20/stream_chacha20.c in rbnacl-libsodium-1.0.13 vs vendor/libsodium/src/libsodium/crypto_stream/chacha20/stream_chacha20.c in rbnacl-libsodium-1.0.15

@@ -25,16 +25,28 @@
 crypto_stream_chacha20_noncebytes(void) {
     return crypto_stream_chacha20_NONCEBYTES;
 }
 
 size_t
+crypto_stream_chacha20_messagebytes_max(void)
+{
+    return crypto_stream_chacha20_MESSAGEBYTES_MAX;
+}
+
+size_t
 crypto_stream_chacha20_ietf_keybytes(void) {
     return crypto_stream_chacha20_ietf_KEYBYTES;
 }
 
 size_t
 crypto_stream_chacha20_ietf_noncebytes(void) {
     return crypto_stream_chacha20_ietf_NONCEBYTES;
+}
+
+size_t
+crypto_stream_chacha20_ietf_messagebytes_max(void)
+{
+    return crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX;
 }
 
 int
 crypto_stream_chacha20(unsigned char *c, unsigned long long clen,
                        const unsigned char *n, const unsigned char *k)