Patch 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)
Files: src/fileio.c
*** ../vim-7.4.008/src/fileio.c 2013-08-05 21:58:03.000000000 +0200
--- src/fileio.c 2013-08-25 17:45:27.000000000 +0200
***************
*** 2926,2934 ****
--- 2926,2939 ----
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();
***************
*** 2977,2982 ****
--- 2982,2989 ----
*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
*** ../vim-7.4.008/src/version.c 2013-08-25 17:01:36.000000000 +0200
--- src/version.c 2013-08-25 17:44:30.000000000 +0200
***************
*** 729,730 ****
--- 729,732 ----
{ /* Add new patch number below this line */
+ /**/
+ 9,
/**/
--
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/// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net \\\
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