Patch 9.0.1484

[Bram Moolenaar]

Patch 9.0.1484
Problem: Coverity warns for using invalid array index.
Solution: Add entry for Xchacha, even though it is not used.
Files: src/memline.c


*** ../vim-9.0.1483/src/memline.c 2023-04-23 17:50:14.853935966 +0100
--- src/memline.c 2023-04-24 18:09:04.776300439 +0100
***************
*** 64,70 ****
#define BLOCK0_ID1_C0 'c' // block 0 id 1 'cm' 0
#define BLOCK0_ID1_C1 'C' // block 0 id 1 'cm' 1
#define BLOCK0_ID1_C2 'd' // block 0 id 1 'cm' 2
! #define BLOCK0_ID1_C3 'S' // block 0 id 1 'cm' 3 - but not actually used

#if defined(FEAT_CRYPT)
static int id1_codes[] = {
--- 64,74 ----
#define BLOCK0_ID1_C0 'c' // block 0 id 1 'cm' 0
#define BLOCK0_ID1_C1 'C' // block 0 id 1 'cm' 1
#define BLOCK0_ID1_C2 'd' // block 0 id 1 'cm' 2
! // BLOCK0_ID1_C3 and BLOCK0_ID1_C4 are for libsodium enctyption. However, for
! // these the swapfile is disabled, thus they will not be used. Added for
! // consistency anyway.
! #define BLOCK0_ID1_C3 'S' // block 0 id 1 'cm' 3
! #define BLOCK0_ID1_C4 's' // block 0 id 1 'cm' 4

#if defined(FEAT_CRYPT)
static int id1_codes[] = {
***************
*** 72,77 ****
--- 76,82 ----
BLOCK0_ID1_C1, // CRYPT_M_BF
BLOCK0_ID1_C2, // CRYPT_M_BF2
BLOCK0_ID1_C3, // CRYPT_M_SOD - Unused!
+ BLOCK0_ID1_C4, // CRYPT_M_SOD2 - Unused!
};
#endif

***************
*** 444,449 ****
--- 449,456 ----

/*
* Prepare encryption for "buf" with block 0 "b0p".
+ * Note: should not be called with libsodium encryption, since xchacha20 does
+ * not support swapfile encryption.
*/
static void
ml_set_b0_crypt(buf_T *buf, ZERO_BL *b0p)
***************
*** 494,507 ****
return; // no memfile yet, nothing to do
old_method = crypt_method_nr_from_name(old_cm);

! // Swapfile encryption not supported by XChaCha20
! if (crypt_method_is_sodium(crypt_get_method_nr(buf)) && *buf->b_p_key != NUL)
{
// close the swapfile
mf_close_file(buf, TRUE);
buf->b_p_swf = FALSE;
return;
}
// First make sure the swapfile is in a consistent state, using the old
// key and method.
{
--- 501,517 ----
return; // no memfile yet, nothing to do
old_method = crypt_method_nr_from_name(old_cm);

! // Swapfile encryption is not supported by XChaCha20, therefore disable the
! // swapfile to avoid plain text being written to disk.
! if (crypt_method_is_sodium(crypt_get_method_nr(buf))
! && *buf->b_p_key != NUL)
{
// close the swapfile
mf_close_file(buf, TRUE);
buf->b_p_swf = FALSE;
return;
}
+
// First make sure the swapfile is in a consistent state, using the old
// key and method.
{
*** ../vim-9.0.1483/src/version.c 2023-04-24 17:15:20.371257120 +0100
--- src/version.c 2023-04-24 18:05:33.124364494 +0100
***************
*** 697,698 ****
--- 697,700 ----
{ /* Add new patch number below this line */
+ /**/
+ 1484,
/**/

--
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/// Bram Moolenaar -- Br...@Moolenaar.net -- http://www.Moolenaar.net \\\
/// \\\
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