updated for version 7.4.009
Problem: When a file was not decrypted (yet), writing it may destroy the
contents.
Solution: Mark the file as readonly until decryption was done. (Christian
Brabandt)
diff --git a/src/fileio.c b/src/fileio.c
index b48a83a..010d933 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2926,9 +2926,14 @@
int *did_ask; /* flag: whether already asked for key */
{
int method = crypt_method_from_magic((char *)ptr, *sizep);
+ int b_p_ro = curbuf->b_p_ro;
if (method >= 0)
{
+ /* Mark the buffer as read-only until the decryption has taken place.
+ * Avoids accidentally overwriting the file with garbage. */
+ curbuf->b_p_ro = TRUE;
+
set_crypt_method(curbuf, method);
if (method > 0)
(void)blowfish_self_test();
@@ -2977,6 +2982,8 @@
*sizep -= CRYPT_MAGIC_LEN + salt_len + seed_len;
mch_memmove(ptr, ptr + CRYPT_MAGIC_LEN + salt_len + seed_len,
(size_t)*sizep);
+ /* Restore the read-only flag. */
+ curbuf->b_p_ro = b_p_ro;
}
}
/* When starting to edit a new file which does not have encryption, clear
diff --git a/src/version.c b/src/version.c
index 22fc9b9..9b5343e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -728,6 +728,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 9,
+/**/
8,
/**/
7,
