diff options
| author | Bram Moolenaar <Bram@vim.org> | 2013-08-25 17:46:08 +0200 |
|---|---|---|
| committer | Bram Moolenaar <Bram@vim.org> | 2013-08-25 17:46:08 +0200 |
| commit | cf81aefd9c33e2619965ce9854c79105dc7b8bea (patch) | |
| tree | 462ec2aceebe610b49294d98489ba4c0ed3a3611 /src/fileio.c | |
| parent | 41f1205fef7eb24656abb3eeb1dea9ff5cdf1b62 (diff) | |
updated for version 7.4.009v7.4.009
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)
Diffstat (limited to 'src/fileio.c')
| -rw-r--r-- | src/fileio.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/fileio.c b/src/fileio.c index b48a83a3cd..010d933a12 100644 --- a/src/fileio.c +++ b/src/fileio.c @@ -2926,9 +2926,14 @@ check_for_cryptkey(cryptkey, ptr, sizep, filesizep, newfile, fname, did_ask) 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 @@ check_for_cryptkey(cryptkey, ptr, sizep, filesizep, newfile, fname, did_ask) *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 |