ccrypt

installation

install
1 2	`brew install ccrypt apt-get install ccrypt`

For simple file encryption :

encrypt a file
1	`ccrypt file`

Results in file.cpt, decrypting it back to file would be :

decrypting
1	`ccrypt -d file.cpt`

But that's mostly not what you want, since you would have to encrypt it again. So use -c or the command ccat to do it to stdout :

ccat
1 2	`ccrypt -c file.cpt ccat file.cpt`

Or redirect it to file, there is no -o option :

ccat into file
1	`ccat file.cpt > file`

Also i see no option for changing the key, but decrypt and encrypt again works perfectly. Also these autocommands in vim (taken from : visit) work out of the box :

~/.vimrc

augroup CPT
 au!
 au BufReadPre *.cpt set bin
 au BufReadPre *.cpt set viminfo=
 au BufReadPre *.cpt set noswapfile
 au BufReadPost *.cpt let $vimpass = inputsecret("Password: ")
 au BufReadPost *.cpt silent '[,']!ccrypt -cb -E vimpass
 au BufReadPost *.cpt set nobin
 au BufWritePre *.cpt set bin
 au BufWritePre *.cpt silent! '[,']!ccrypt -e -E vimpass
 au BufWritePost *.cpt silent! u
 au BufWritePost *.cpt set nobin
augroup END

I added these to the .vimrc file in bitbucket.