Re: Re:Re: Blowfish[2] failed to encrypt big text file of 24MB

On Friday, February 13, 2015 at 4:16:01 AM UTC-6, might1 wrote:
> At 2015-02-13 18:00:32，"might1" <might1@126.com> wrote:
> > Right now, I just tried vim7.4 downloaded from www.vim.org.
> According to your way, I tried in commanld line 'vim -u NONE -N
> test.txt'   and  'gvim -u NONE -N test.txt' to encrypt with blowfish
> method, both failed. The resulting files all growed to 113MB. Really
> strange! No error jumped out.
>
> Do you need I attach the resulting encrypted file whose size remains 113MB after max compression?
>

Actually, attaching the already encrypted file is pretty much useless.

I experimented some, with the attached toy input file (compressed with 7-zip to avoid a huge attachment), and found that the issue seems to be related to writing *new* files somehow.

If I create an encrypted output file as follows, everything works fine:

:e encrypt_in.txt
:saveas encrypt_blowfish2.txt
:X
password
password
:w

However, if I encrypt as follows, I see the E381 error repeated a bunch of times, and Vim seems to hang if I quit that error and try the password again and write, presumably creating that giant file the OP mentioned:

:r encrypt_in.txt
ggdd
:X
password
password
:w encrypt_blowfish2.txt

Oddly enough, this also fails:

:r encrypt_in.txt
ggdd
:w encrypt_blowfish2.txt
:X
password
password
:w

But this succeeds (after a really long time):

:r encrypt_in.txt
ggdd
:w encrypt_blowfish2.txt
:e
:X
password
password
:w

It seems to be related to encrypting the swapfile for the new file. This fails:

:set swapfile noundofile
:r encrypt_in.txt
ggdd
:X
password
password
:w encrypt_blowfish2.txt

But this succeeds:

:set noswapfile undofile
:r encrypt_in.txt
ggdd
:X
password
password
:w encrypt_blowfish2.txt

Using the following Vim version on Windows 7:

VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Feb 4 2015 10:16:41)
MS-Windows 64-bit GUI version with OLE support
Included patches: 1-608
Compiled by {my user name}
Huge version with GUI. Features included (+) or not (-):
+acl +cryptv +file_in_path +listcmds +persistent_undo +statusline +visual
+arabic +cscope +find_in_path +localmap -postscript -sun_workshop +visualextra
+autocmd +cursorbind +float -lua +printer +syntax +viminfo
+balloon_eval +cursorshape +folding +menu +profile +tag_binary +vreplace
+browse +dialog_con_gui -footer +mksession +python/dyn +tag_old_static +wildignore
++builtin_terms +diff +gettext/dyn +modify_fname -python3 -tag_any_white +wildmenu
+byte_offset +digraphs -hangul_input +mouse +quickfix -tcl +windows
+cindent -directx +iconv/dyn +mouseshape +reltime -tgetent +writebackup
+clientserver -dnd +insert_expand +multi_byte +rightleft -termresponse -xfontset
+clipboard -ebcdic +jumplist +multi_lang -ruby +textobjects -xim
+cmdline_compl +emacs_tags +keymap -mzscheme +scrollbind +title -xterm_save
+cmdline_hist +eval +langmap +netbeans_intg +signs +toolbar +xpm_w32
+cmdline_info +ex_extra +libcall +ole +smartindent +user_commands
+comments +extra_search +linebreak +path_extra -sniff +vertsplit
+conceal +farsi +lispindent -perl +startuptime +virtualedit

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