From f6d7af21a399979952ac4b4f066c42c7e167f5bf Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Fri, 14 Aug 2020 15:51:00 +0200
Subject: Null terminate the sodium_crypto_kx_keypair() result

---
 ext/sodium/libsodium.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/ext/sodium/libsodium.c b/ext/sodium/libsodium.c
index 32e54dc05f..142393b7c2 100644
--- 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);
 }
 
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