commit 131530a54d0f72b820b027606231744e3a09b9ef
author Bram Moolenaar <Bram@vim.org> Thu Jul 29 20:37:49 2021 +0200
committer Bram Moolenaar <Bram@vim.org> Thu Jul 29 20:37:49 2021 +0200
tree d288b74f18adb46ab6917e506dc78616fd0463c7
parent 41114a2a27047bf1884e092b98c6298c128eb2f0

patch 8.2.3245: the crypt key may appear in a swap partition

Problem:    The crypt key may appear in a swap partition.
Solution:   When using xchaha20 use sodium_mlock(). (Christian Brabandt,
            closes #8657)

src/buffer.c

diff --git a/src/buffer.c b/src/buffer.c
index 59397e4..628c82f 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2306,6 +2306,10 @@
     clear_string_option(&buf->b_p_fex);
 #endif
 #ifdef FEAT_CRYPT
+# ifdef FEAT_SODIUM
+    if (buf->b_p_key != NULL && (crypt_get_method_nr(buf) == CRYPT_M_SOD))
+	sodium_munlock(buf->b_p_key, STRLEN(buf->b_p_key));
+# endif
     clear_string_option(&buf->b_p_key);
 #endif
     clear_string_option(&buf->b_p_kp);