Null terminate the sodium_crypto_kx_keypair() result

diff --git a/ext/sodium/libsodium.c b/ext/sodium/libsodium.c
index 32e54dc05fd8c63a9829fc0489a10981fa1ec846..142393b7c2e91b7c78deaa21456aea6a97a22f9f 100644 (file)
--- a/ext/sodium/libsodium.c
+++ b/ext/sodium/libsodium.c
@@ -2885,6 +2885,7 @@ PHP_FUNCTION(sodium_crypto_kx_keypair)
                zend_throw_exception(sodium_exception_ce, "internal error", 0);
                return;
        }
+       ZSTR_VAL(keypair)[crypto_kx_SECRETKEYBYTES + crypto_kx_PUBLICKEYBYTES] = 0;
        RETURN_STR(keypair);
 }