diff options
| -rw-r--r-- | vim/plugin/gnupg.vim | 1177 |
1 files changed, 1177 insertions, 0 deletions
diff --git a/vim/plugin/gnupg.vim b/vim/plugin/gnupg.vim new file mode 100644 index 0000000..09116d6 --- /dev/null +++ b/vim/plugin/gnupg.vim @@ -0,0 +1,1177 @@ +" Name: gnupg.vim +" Version: $Id: gnupg.vim 3026 2010-01-27 08:18:04Z mbr $ +" Author: Markus Braun <markus.braun@krawel.de> +" Summary: Vim plugin for transparent editing of gpg encrypted files. +" Licence: This program is free software; you can redistribute it and/or +" modify it under the terms of the GNU General Public License. +" See http://www.gnu.org/copyleft/gpl.txt +" +" Section: Documentation {{{1 +" +" Description: {{{2 +" +" This script implements transparent editing of gpg encrypted files. The +" filename must have a ".gpg", ".pgp" or ".asc" suffix. When opening such +" a file the content is decrypted, when opening a new file the script will +" ask for the recipients of the encrypted file. The file content will be +" encrypted to all recipients before it is written. The script turns off +" viminfo and swapfile to increase security. +" +" Installation: {{{2 +" +" Copy the gnupg.vim file to the $HOME/.vim/plugin directory. +" Refer to ':help add-plugin', ':help add-global-plugin' and ':help +" runtimepath' for more details about Vim plugins. +" +" From "man 1 gpg-agent": +" +" ... +" You should always add the following lines to your .bashrc or whatever +" initialization file is used for all shell invocations: +" +" GPG_TTY=`tty` +" export GPG_TTY +" +" It is important that this environment variable always reflects the out‐ +" put of the tty command. For W32 systems this option is not required. +" ... +" +" Most distributions provide software to ease handling of gpg and gpg-agent. +" Examples are keychain or seahorse. +" +" Commands: {{{2 +" +" :GPGEditRecipients +" Opens a scratch buffer to change the list of recipients. Recipients that +" are unknown (not in your public key) are highlighted and have +" a prepended "!". Closing the buffer makes the changes permanent. +" +" :GPGViewRecipients +" Prints the list of recipients. +" +" :GPGEditOptions +" Opens a scratch buffer to change the options for encryption (symmetric, +" asymmetric, signing). Closing the buffer makes the changes permanent. +" WARNING: There is no check of the entered options, so you need to know +" what you are doing. +" +" :GPGViewOptions +" Prints the list of options. +" +" Variables: {{{2 +" +" g:GPGExecutable +" If set used as gpg executable, otherwise the system chooses what is run +" when "gpg" is called. Defaults to "gpg". +" +" g:GPGUseAgent +" If set to 0 a possible available gpg-agent won't be used. Defaults to 1. +" +" g:GPGPreferSymmetric +" If set to 1 symmetric encryption is preferred for new files. Defaults to 0. +" +" g:GPGPreferArmor +" If set to 1 armored data is preferred for new files. Defaults to 0. +" +" g:GPGPreferSign +" If set to 1 signed data is preferred for new files. Defaults to 0. +" +" g:GPGDefaultRecipients +" If set, these recipients are used as defaults when no other recipient is +" defined. This variable is a Vim list. Default is unset. +" +" Known Issues: {{{2 +" +" In some cases gvim can't decryt files + +" This is caused by the fact that a running gvim has no TTY and thus gpg is +" not able to ask for the passphrase by itself. This is a problem for Windows +" and Linux versions of gvim and could not be solved unless a "terminal +" emulation" is implemented for gvim. To circumvent this you have to use any +" combination of gpg-agent and a graphical pinentry program: +" +" - gpg-agent only: +" you need to provide the passphrase for the needed key to gpg-agent +" in a terminal before you open files with gvim which require this key. +" +" - pinentry only: +" you will get a popup window every time you open a file that needs to +" be decrypted. +" +" - gpgagent and pinentry: +" you will get a popup window the first time you open a file that +" needs to be decrypted. +" +" Credits: {{{2 +" +" - Mathieu Clabaut for inspirations through his vimspell.vim script. +" - Richard Bronosky for patch to enable ".pgp" suffix. +" - Erik Remmelzwaal for patch to enable windows support and patient beta +" testing. +" - Lars Becker for patch to make gpg2 working. +" - Thomas Arendsen Hein for patch to convert encoding of gpg output +" - Karl-Heinz Ruskowski for patch to fix unknown recipients and trust model +" and patient beta testing. +" - Giel van Schijndel for patch to get GPG_TTY dynamically. +" - Sebastian Luettich for patch to fix issue with symmetric encryption an set +" recipients. +" - Tim Swast for patch to generate signed files +" +" Section: Plugin header {{{1 + +" guard against multiple loads {{{2 +if (exists("g:loaded_gnupg") || &cp || exists("#BufReadPre#*.\(gpg\|asc\|pgp\)")) + finish +endif +let g:loaded_gnupg = "$Revision: 3026 $" + +" check for correct vim version {{{2 +if (v:version < 700) + echohl ErrorMsg | echo 'plugin gnupg.vim requires Vim version >= 7.0' | echohl None + finish +endif + +" Section: Autocmd setup {{{1 + +augroup GnuPG + autocmd! + + " initialize the internal variables + autocmd BufNewFile,BufReadPre,FileReadPre *.\(gpg\|asc\|pgp\) call s:GPGInit() + " force the user to edit the recipient list if he opens a new file and public + " keys are preferred + autocmd BufNewFile *.\(gpg\|asc\|pgp\) if (exists("g:GPGPreferSymmetric") && g:GPGPreferSymmetric == 0) | call s:GPGEditRecipients() | endif + " do the decryption + autocmd BufReadPost,FileReadPost *.\(gpg\|asc\|pgp\) call s:GPGDecrypt() + + " convert all text to encrypted text before writing + autocmd BufWritePre,FileWritePre *.\(gpg\|asc\|pgp\) call s:GPGEncrypt() + " undo the encryption so we are back in the normal text, directly + " after the file has been written. + autocmd BufWritePost,FileWritePost *.\(gpg\|asc\|pgp\) call s:GPGEncryptPost() + + " cleanup on leaving vim + autocmd VimLeave *.\(gpg\|asc\|pgp\) call s:GPGCleanup() +augroup END + +" Section: Constants {{{1 + +let s:GPGMagicString = "\t \t" + +" Section: Highlight setup {{{1 + +highlight default link GPGWarning WarningMsg +highlight default link GPGError ErrorMsg +highlight default link GPGHighlightUnknownRecipient ErrorMsg + +" Section: Functions {{{1 + +" Function: s:GPGInit() {{{2 +" +" initialize the plugin +" +function s:GPGInit() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGInit()") + + " first make sure nothing is written to ~/.viminfo while editing + " an encrypted file. + set viminfo= + + " we don't want a swap file, as it writes unencrypted data to disk + set noswapfile + + " check what gpg command to use + if (!exists("g:GPGExecutable")) + let g:GPGExecutable = "gpg --trust-model always" + endif + + " check if gpg-agent is allowed + if (!exists("g:GPGUseAgent")) + let g:GPGUseAgent = 1 + endif + + " check if symmetric encryption is preferred + if (!exists("g:GPGPreferSymmetric")) + let g:GPGPreferSymmetric = 0 + endif + + " check if armored files are preferred + if (!exists("g:GPGPreferArmor")) + let g:GPGPreferArmor = 0 + endif + + " check if signed files are preferred + if (!exists("g:GPGPreferSign")) + let g:GPGPreferSign = 0 + endif + + " start with empty default recipients if none is defined so far + if (!exists("g:GPGDefaultRecipients")) + let g:GPGDefaultRecipients = [] + endif + + " print version + call s:GPGDebug(1, "gnupg.vim ". g:loaded_gnupg) + + " determine if gnupg can use the gpg-agent + if (exists("$GPG_AGENT_INFO") && g:GPGUseAgent == 1) + if (!exists("$GPG_TTY") && !has("gui_running")) + let $GPG_TTY = system("tty") + if (v:shell_error) + let $GPG_TTY = "" + echohl GPGError + echom "The GPG_TTY is not set and no TTY could be found using the `tty` command!" + echom "gpg-agent might not work." + echohl None + endif + endif + let s:GPGCommand = g:GPGExecutable . " --use-agent" + else + let s:GPGCommand = g:GPGExecutable . " --no-use-agent" + endif + + " don't use tty in gvim + " FIXME find a better way to avoid an error. + " with this solution only --use-agent will work + if (has("gui_running")) + let s:GPGCommand = s:GPGCommand . " --no-tty" + endif + + " setup shell environment for unix and windows + let s:shellredirsave = &shellredir + let s:shellsave = &shell + if (has("unix")) + " unix specific settings + let s:shellredir = ">%s 2>&1" + let s:shell = '/bin/sh' + let s:stderrredirnull = '2>/dev/null' + let s:GPGCommand = "LANG=C LC_ALL=C " . s:GPGCommand + else + " windows specific settings + let s:shellredir = '>%s' + let s:shell = &shell + let s:stderrredirnull = '2>nul' + endif + + call s:GPGDebug(3, "shellredirsave: " . s:shellredirsave) + call s:GPGDebug(3, "shellsave: " . s:shellsave) + + call s:GPGDebug(3, "shell: " . s:shell) + call s:GPGDebug(3, "shellcmdflag: " . &shellcmdflag) + call s:GPGDebug(3, "shellxquote: " . &shellxquote) + call s:GPGDebug(3, "shellredir: " . s:shellredir) + call s:GPGDebug(3, "stderrredirnull: " . s:stderrredirnull) + + call s:GPGDebug(3, "shell implementation: " . resolve(s:shell)) + + " find the supported algorithms + let commandline = s:GPGCommand . " --version" + call s:GPGDebug(2, "command: ". commandline) + let &shellredir = s:shellredir + let &shell = s:shell + let output = system(commandline) + let &shellredir = s:shellredirsave + let &shell = s:shellsave + call s:GPGDebug(2, "output: ". output) + + let s:GPGPubkey = substitute(output, ".*Pubkey: \\(.\\{-}\\)\n.*", "\\1", "") + let s:GPGCipher = substitute(output, ".*Cipher: \\(.\\{-}\\)\n.*", "\\1", "") + let s:GPGHash = substitute(output, ".*Hash: \\(.\\{-}\\)\n.*", "\\1", "") + let s:GPGCompress = substitute(output, ".*Compress.\\{-}: \\(.\\{-}\\)\n.*", "\\1", "") + + call s:GPGDebug(2, "public key algorithms: " . s:GPGPubkey) + call s:GPGDebug(2, "cipher algorithms: " . s:GPGCipher) + call s:GPGDebug(2, "hashing algorithms: " . s:GPGHash) + call s:GPGDebug(2, "compression algorithms: " . s:GPGCompress) + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGInit()") +endfunction + +" Function: s:GPGCleanup() {{{2 +" +" cleanup on leaving vim +" +function s:GPGCleanup() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGCleanup()") + + " wipe out screen + new +only + redraw! + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGCleanup()") +endfunction + +" Function: s:GPGDecrypt() {{{2 +" +" decrypt the buffer and find all recipients of the encrypted file +" +function s:GPGDecrypt() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGDecrypt()") + + " switch to binary mode to read the encrypted file + set bin + + " get the filename of the current buffer + let filename = escape(expand("%:p"), '\"') + + " clear GPGEncrypted, GPGRecipients and GPGOptions + let b:GPGEncrypted = 0 + let b:GPGRecipients = [] + let b:GPGOptions = [] + + " find the recipients of the file + let commandline = s:GPGCommand . " --verbose --decrypt --list-only --dry-run --batch --no-use-agent --logger-fd 1 \"" . filename . "\"" + call s:GPGDebug(3, "command: " . commandline) + let &shellredir = s:shellredir + let &shell = s:shell + let output = system(commandline) + let &shellredir = s:shellredirsave + let &shell = s:shellsave + call s:GPGDebug(3, "output: ". output) + + " check if the file is symmetric/asymmetric encrypted + if (match(output, "gpg: encrypted with [[:digit:]]\\+ passphrase") >= 0) + " file is symmetric encrypted + let b:GPGEncrypted = 1 + call s:GPGDebug(1, "this file is symmetric encrypted") + + let b:GPGOptions += ["symmetric"] + + " find the used cipher algorithm + let cipher = substitute(output, ".*gpg: \\([^ ]\\+\\) encrypted data.*", "\\1", "") + if (match(s:GPGCipher, "\\<" . cipher . "\\>") >= 0) + let b:GPGOptions += ["cipher-algo " . cipher] + call s:GPGDebug(1, "cipher-algo is " . cipher) + else + echohl GPGWarning + echom "The cipher " . cipher . " is not known by the local gpg command. Using default!" + echo + echohl None + endif + elseif (match(output, "gpg: public key is [[:xdigit:]]\\{8}") >= 0) + " file is asymmetric encrypted + let b:GPGEncrypted = 1 + call s:GPGDebug(1, "this file is asymmetric encrypted") + + let b:GPGOptions += ["encrypt"] + + " find the used public keys + let start = match(output, "gpg: public key is [[:xdigit:]]\\{8}") + while (start >= 0) + let start = start + strlen("gpg: public key is ") + let recipient = strpart(output, start, 8) + call s:GPGDebug(1, "recipient is " . recipient) + let name = s:GPGNameToID(recipient) + if (strlen(name) > 0) + let b:GPGRecipients += [name] + call s:GPGDebug(1, "name of recipient is " . name) + else + let b:GPGRecipients += [recipient] + echohl GPGWarning + echom "The recipient \"" . recipient . "\" is not in your public keyring!" + echohl None + end + let start = match(output, "gpg: public key is [[:xdigit:]]\\{8}", start) + endwhile + else + " file is not encrypted + let b:GPGEncrypted = 0 + call s:GPGDebug(1, "this file is not encrypted") + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + set nobin + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGDecrypt()") + return + endif + + " check if the message is armored + if (match(output, "gpg: armor header") >= 0) + call s:GPGDebug(1, "this file is armored") + let b:GPGOptions += ["armor"] + endif + + " finally decrypt the buffer content + " since even with the --quiet option passphrase typos will be reported, + " we must redirect stderr (using shell temporarily) + call s:GPGDebug(1, "decrypting file") + let commandline = "'[,']!" . s:GPGCommand . " --quiet --decrypt " . s:stderrredirnull + call s:GPGDebug(1, "command: " . commandline) + let &shellredir = s:shellredir + let &shell = s:shell + execute commandline + let &shellredir = s:shellredirsave + let &shell = s:shellsave + if (v:shell_error) " message could not be decrypted + silent u + echohl GPGError + let blackhole = input("Message could not be decrypted! (Press ENTER)") + echohl None + bwipeout + set nobin + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGDecrypt()") + return + endif + + " turn off binary mode + set nobin + + " call the autocommand for the file minus .gpg$ + execute ":doautocmd BufReadPost " . escape(expand("%:r"), ' *?\"'."'") + call s:GPGDebug(2, "called autocommand for " . escape(expand("%:r"), ' *?\"'."'")) + + " refresh screen + redraw! + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGDecrypt()") +endfunction + +" Function: s:GPGEncrypt() {{{2 +" +" encrypts the buffer to all previous recipients +" +function s:GPGEncrypt() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGEncrypt()") + + " save window view + let s:GPGWindowView = winsaveview() + call s:GPGDebug(2, "saved window view " . string(s:GPGWindowView)) + + " store encoding and switch to a safe one + if (&fileencoding != &encoding) + let s:GPGEncoding = &encoding + let &encoding = &fileencoding + call s:GPGDebug(2, "encoding was \"" . s:GPGEncoding . "\", switched to \"" . &encoding . "\"") + else + let s:GPGEncoding = "" + call s:GPGDebug(2, "encoding and fileencoding are the same (\"" . &encoding . "\"), not switching") + endif + + " switch buffer to binary mode + set bin + + " guard for unencrypted files + if (!exists("b:GPGEncrypted") || b:GPGEncrypted == 0) + echohl GPGError + let blackhole = input("Message could not be encrypted! File might be empty! (Press ENTER)") + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEncrypt()") + return + endif + + " initialize GPGOptions if not happened before + if (!exists("b:GPGOptions") || len(b:GPGOptions) == 0) + let b:GPGOptions = [] + if (exists("g:GPGPreferSymmetric") && g:GPGPreferSymmetric == 1) + let b:GPGOptions += ["symmetric"] + let b:GPGRecipients = [] + else + let b:GPGOptions += ["encrypt"] + endif + if (exists("g:GPGPreferArmor") && g:GPGPreferArmor == 1) + let b:GPGOptions += ["armor"] + endif + if (exists("g:GPGPreferSign") && g:GPGPreferSign == 1) + let b:GPGOptions += ["sign"] + endif + call s:GPGDebug(1, "no options set, so using default options: " . string(b:GPGOptions)) + endif + + " built list of options + let options = "" + for option in b:GPGOptions + let options = options . " --" . option . " " + endfor + + " check here again if all recipients are available in the keyring + let [ recipients, unknownrecipients ] = s:GPGCheckRecipients(b:GPGRecipients) + + " check if there are unknown recipients and warn + if (len(unknownrecipients) > 0) + echohl GPGWarning + echom "Please use GPGEditRecipients to correct!!" + echo + echohl None + + " Let user know whats happend and copy known_recipients back to buffer + let dummy = input("Press ENTER to quit") + endif + + " built list of recipients + if (len(recipients) > 0) + for gpgid in recipients + let options = options . " -r " . gpgid + endfor + else + if (match(b:GPGOptions, "encrypt") >= 0) + echohl GPGError + echom "There are no recipients!!" + echom "Please use GPGEditRecipients to correct!!" + echo + echohl None + endif + endif + + " encrypt the buffer + let commandline = "'[,']!" . s:GPGCommand . " --quiet --no-encrypt-to " . options . " " . s:stderrredirnull + call s:GPGDebug(1, "command: " . commandline) + let &shellredir = s:shellredir + let &shell = s:shell + silent execute commandline + let &shellredir = s:shellredirsave + let &shell = s:shellsave + if (v:shell_error) " message could not be encrypted + " delete content of the buffer to be sure no data is written unencrypted + " content will be recovered in GPGEncryptPost() + silent normal! 1GdG + + echohl GPGError + let blackhole = input("Message could not be encrypted! File might be empty! (Press ENTER)") + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEncrypt()") + return + endif + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEncrypt()") +endfunction + +" Function: s:GPGEncryptPost() {{{2 +" +" undo changes don by encrypt, after writing +" +function s:GPGEncryptPost() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGEncryptPost()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEncryptPost()") + return + endif + + " undo encryption of buffer content + silent u + + " switch back from binary mode + set nobin + + " restore encoding + if (s:GPGEncoding != "") + let &encoding = s:GPGEncoding + call s:GPGDebug(2, "restored encoding \"" . &encoding . "\"") + endif + + " restore window view + call winrestview(s:GPGWindowView) + call s:GPGDebug(2, "restored window view" . string(s:GPGWindowView)) + + " refresh screen + redraw! + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEncryptPost()") +endfunction + +" Function: s:GPGViewRecipients() {{{2 +" +" echo the recipients +" +function s:GPGViewRecipients() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGViewRecipients()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGViewRecipients()") + return + endif + + let [ recipients, unknownrecipients ] = s:GPGCheckRecipients(b:GPGRecipients) + + echo 'This file has following recipients (Unknown recipients have a prepended "!"):' + " echo the recipients + for name in recipients + let name = s:GPGIDToName(name) + echo name + endfor + + " echo the unknown recipients + echohl GPGWarning + for name in unknownrecipients + let name = "!" . name + echo name + endfor + echohl None + + " check if there is any known recipient + if (len(recipients) == 0) + echohl GPGError + echom 'There are no known recipients!' + echohl None + endif + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGViewRecipients()") +endfunction + +" Function: s:GPGEditRecipients() {{{2 +" +" create a scratch buffer with all recipients to add/remove recipients +" +function s:GPGEditRecipients() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGEditRecipients()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEditRecipients()") + return + endif + + " only do this if it isn't already a GPGRecipients_* buffer + if (match(bufname("%"), "^\\(GPGRecipients_\\|GPGOptions_\\)") != 0 && match(bufname("%"), "\.\\(gpg\\|asc\\|pgp\\)$") >= 0) + + " save buffer name + let buffername = bufname("%") + let editbuffername = "GPGRecipients_" . buffername + + " check if this buffer exists + if (!bufexists(editbuffername)) + " create scratch buffer + execute 'silent! split ' . escape(editbuffername, ' *?\"'."'") + + " add a autocommand to regenerate the recipients after a write + autocmd BufHidden,BufUnload,BufWriteCmd <buffer> call s:GPGFinishRecipientsBuffer() + else + if (bufwinnr(editbuffername) >= 0) + " switch to scratch buffer window + execute 'silent! ' . bufwinnr(editbuffername) . "wincmd w" + else + " split scratch buffer window + execute 'silent! sbuffer ' . escape(editbuffername, ' *?\"'."'") + + " add a autocommand to regenerate the recipients after a write + autocmd BufHidden,BufUnload,BufWriteCmd <buffer> call s:GPGFinishRecipientsBuffer() + endif + + " empty the buffer + silent normal! 1GdG + endif + + " Mark the buffer as a scratch buffer + setlocal buftype=acwrite + setlocal bufhidden=hide + setlocal noswapfile + setlocal nowrap + setlocal nobuflisted + setlocal nonumber + + " so we know for which other buffer this edit buffer is + let b:GPGCorrespondingTo = buffername + + " put some comments to the scratch buffer + silent put ='GPG: ----------------------------------------------------------------------' + silent put ='GPG: Please edit the list of recipients, one recipient per line.' + silent put ='GPG: Unknown recipients have a prepended \"!\".' + silent put ='GPG: Lines beginning with \"GPG:\" are removed automatically.' + silent put ='GPG: Data after recipients between and including \"(\" and \")\" is ignored.' + silent put ='GPG: Closing this buffer commits changes.' + silent put ='GPG: ----------------------------------------------------------------------' + + " get the recipients + let [ recipients, unknownrecipients ] = s:GPGCheckRecipients(getbufvar(b:GPGCorrespondingTo, "GPGRecipients")) + + " if there are no known or unknown recipients, use the default ones + if (len(recipients) == 0 && len(unknownrecipients) == 0) + if (type(g:GPGDefaultRecipients) == type([])) + let [ recipients, unknownrecipients ] = s:GPGCheckRecipients(g:GPGDefaultRecipients) + else + echohl GPGWarning + echom "g:GPGDefaultRecipients is not a Vim list, please correct this in your vimrc!" + echohl None + endif + endif + + " put the recipients in the scratch buffer + for name in recipients + let name = s:GPGIDToName(name) + silent put =name + endfor + + " put the unknown recipients in the scratch buffer + let syntaxPattern = "\\(nonexxistinwordinthisbuffer" + for name in unknownrecipients + let name = "!" . name + let syntaxPattern = syntaxPattern . "\\|" . name + silent put =name + endfor + let syntaxPattern = syntaxPattern . "\\)" + + " define highlight + if (has("syntax") && exists("g:syntax_on")) + execute 'syntax match GPGUnknownRecipient "' . syntaxPattern . '"' + highlight clear GPGUnknownRecipient + highlight link GPGUnknownRecipient GPGHighlightUnknownRecipient + + syntax match GPGComment "^GPG:.*$" + execute 'syntax match GPGComment "' . s:GPGMagicString . '.*$"' + highlight clear GPGComment + highlight link GPGComment Comment + endif + + " delete the empty first line + silent normal! 1Gdd + + " jump to the first recipient + silent normal! G + + endif + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEditRecipients()") +endfunction + +" Function: s:GPGFinishRecipientsBuffer() {{{2 +" +" create a new recipient list from RecipientsBuffer +" +function s:GPGFinishRecipientsBuffer() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGFinishRecipientsBuffer()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGFinishRecipientsBuffer()") + return + endif + + " go to buffer before doing work + if (bufnr("%") != expand("<abuf>")) + " switch to scratch buffer window + execute 'silent! ' . bufwinnr(expand("<afile>")) . "wincmd w" + endif + + " delete the autocommand + autocmd! * <buffer> + + + " get the recipients from the scratch buffer + let recipients = [] + let lines = getline(1,"$") + for recipient in lines + " delete all text after magic string + let recipient = substitute(recipient, s:GPGMagicString . ".*$", "", "") + + " delete all spaces at beginning and end of the recipient + " also delete a '!' at the beginning of the recipient + let recipient = substitute(recipient, "^[[:space:]!]*\\(.\\{-}\\)[[:space:]]*$", "\\1", "") + + " delete comment lines + let recipient = substitute(recipient, "^GPG:.*$", "", "") + + " only do this if the line is not empty + if (strlen(recipient) > 0) + let gpgid = s:GPGNameToID(recipient) + if (strlen(gpgid) > 0) + if (match(recipients, gpgid) < 0) + let recipients += [gpgid] + endif + else + if (match(recipients, recipient) < 0) + let recipients += [recipient] + echohl GPGWarning + echom "The recipient \"" . recipient . "\" is not in your public keyring!" + echohl None + endif + endif + endif + endfor + + " write back the new recipient list to the corresponding buffer and mark it + " as modified. Buffer is now for sure a encrypted buffer. + call setbufvar(b:GPGCorrespondingTo, "GPGRecipients", recipients) + call setbufvar(b:GPGCorrespondingTo, "&mod", 1) + call setbufvar(b:GPGCorrespondingTo, "GPGEncrypted", 1) + + " check if there is any known recipient + if (len(recipients) == 0) + echohl GPGError + echom 'There are no known recipients!' + echohl None + endif + + " reset modified flag + set nomodified + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGFinishRecipientsBuffer()") +endfunction + +" Function: s:GPGViewOptions() {{{2 +" +" echo the recipients +" +function s:GPGViewOptions() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGViewOptions()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGViewOptions()") + return + endif + + if (exists("b:GPGOptions")) + echo 'This file has following options:' + " echo the options + for option in b:GPGOptions + echo option + endfor + endif + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGViewOptions()") +endfunction + +" Function: s:GPGEditOptions() {{{2 +" +" create a scratch buffer with all recipients to add/remove recipients +" +function s:GPGEditOptions() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGEditOptions()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEditOptions()") + return + endif + + " only do this if it isn't already a GPGOptions_* buffer + if (match(bufname("%"), "^\\(GPGRecipients_\\|GPGOptions_\\)") != 0 && match(bufname("%"), "\.\\(gpg\\|asc\\|pgp\\)$") >= 0) + + " save buffer name + let buffername = bufname("%") + let editbuffername = "GPGOptions_" . buffername + + " check if this buffer exists + if (!bufexists(editbuffername)) + " create scratch buffer + execute 'silent! split ' . escape(editbuffername, ' *?\"'."'") + + " add a autocommand to regenerate the options after a write + autocmd BufHidden,BufUnload,BufWriteCmd <buffer> call s:GPGFinishOptionsBuffer() + else + if (bufwinnr(editbuffername) >= 0) + " switch to scratch buffer window + execute 'silent! ' . bufwinnr(editbuffername) . "wincmd w" + else + " split scratch buffer window + execute 'silent! sbuffer ' . escape(editbuffername, ' *?\"'."'") + + " add a autocommand to regenerate the options after a write + autocmd BufHidden,BufUnload,BufWriteCmd <buffer> call s:GPGFinishOptionsBuffer() + endif + + " empty the buffer + silent normal! 1GdG + endif + + " Mark the buffer as a scratch buffer + setlocal buftype=nofile + setlocal noswapfile + setlocal nowrap + setlocal nobuflisted + setlocal nonumber + + " so we know for which other buffer this edit buffer is + let b:GPGCorrespondingTo = buffername + + " put some comments to the scratch buffer + silent put ='GPG: ----------------------------------------------------------------------' + silent put ='GPG: THERE IS NO CHECK OF THE ENTERED OPTIONS!' + silent put ='GPG: YOU NEED TO KNOW WHAT YOU ARE DOING!' + silent put ='GPG: IF IN DOUBT, QUICKLY EXIT USING :x OR :bd.' + silent put ='GPG: Please edit the list of options, one option per line.' + silent put ='GPG: Please refer to the gpg documentation for valid options.' + silent put ='GPG: Lines beginning with \"GPG:\" are removed automatically.' + silent put ='GPG: Closing this buffer commits changes.' + silent put ='GPG: ----------------------------------------------------------------------' + + " put the options in the scratch buffer + let options = getbufvar(b:GPGCorrespondingTo, "GPGOptions") + + for option in options + silent put =option + endfor + + " delete the empty first line + silent normal! 1Gdd + + " jump to the first option + silent normal! G + + " define highlight + if (has("syntax") && exists("g:syntax_on")) + syntax match GPGComment "^GPG:.*$" + highlight clear GPGComment + highlight link GPGComment Comment + endif + endif + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGEditOptions()") +endfunction + +" Function: s:GPGFinishOptionsBuffer() {{{2 +" +" create a new option list from OptionsBuffer +" +function s:GPGFinishOptionsBuffer() + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGFinishOptionsBuffer()") + + " guard for unencrypted files + if (exists("b:GPGEncrypted") && b:GPGEncrypted == 0) + echohl GPGWarning + echom "File is not encrypted, all GPG functions disabled!" + echohl None + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGFinishOptionsBuffer()") + return + endif + + " go to buffer before doing work + if (bufnr("%") != expand("<abuf>")) + " switch to scratch buffer window + execute 'silent! ' . bufwinnr(expand("<afile>")) . "wincmd w" + endif + + " clear options and unknownOptions + let options = [] + let unknownOptions = [] + + " delete the autocommand + autocmd! * <buffer> + + " get the options from the scratch buffer + let lines = getline(1, "$") + for option in lines + " delete all spaces at beginning and end of the option + " also delete a '!' at the beginning of the option + let option = substitute(option, "^[[:space:]!]*\\(.\\{-}\\)[[:space:]]*$", "\\1", "") + " delete comment lines + let option = substitute(option, "^GPG:.*$", "", "") + + " only do this if the line is not empty + if (strlen(option) > 0 && match(options, option) < 0) + let options += [option] + endif + endfor + + " write back the new option list to the corresponding buffer and mark it + " as modified + call setbufvar(b:GPGCorrespondingTo, "GPGOptions", options) + call setbufvar(b:GPGCorrespondingTo, "&mod", 1) + + " reset modified flag + set nomodified + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGFinishOptionsBuffer()") +endfunction + +" Function: s:GPGCheckRecipients(tocheck) {{{2 +" +" check if recipients are known +" Returns: two lists recipients and unknownrecipients +" +function s:GPGCheckRecipients(tocheck) + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGCheckRecipients()") + + let recipients = [] + let unknownrecipients = [] + + if (type(a:tocheck) == type([])) + for recipient in a:tocheck + let gpgid = s:GPGNameToID(recipient) + if (strlen(gpgid) > 0) + if (match(recipients, gpgid) < 0) + let recipients += [gpgid] + endif + else + if (match(unknownrecipients, recipient) < 0) + let unknownrecipients += [recipient] + echohl GPGWarning + echom "The recipient \"" . recipient . "\" is not in your public keyring!" + echohl None + endif + end + endfor + endif + + call s:GPGDebug(2, "recipients are: " . string(recipients)) + call s:GPGDebug(2, "unknown recipients are: " . string(unknownrecipients)) + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGCheckRecipients()") + return [ recipients, unknownrecipients ] +endfunction + +" Function: s:GPGNameToID(name) {{{2 +" +" find GPG key ID corresponding to a name +" Returns: ID for the given name +" +function s:GPGNameToID(name) + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGNameToID()") + + " ask gpg for the id for a name + let commandline = s:GPGCommand . " --quiet --with-colons --fixed-list-mode --list-keys \"" . a:name . "\"" + call s:GPGDebug(2, "command: ". commandline) + let &shellredir = s:shellredir + let &shell = s:shell + let output = system(commandline) + let &shellredir = s:shellredirsave + let &shell = s:shellsave + call s:GPGDebug(2, "output: ". output) + + " when called with "--with-colons" gpg encodes its output _ALWAYS_ as UTF-8, + " so convert it, if necessary + if (&encoding != "utf-8") + let output = iconv(output, "utf-8", &encoding) + endif + let lines = split(output, "\n") + + " parse the output of gpg + let pubseen = 0 + let counter = 0 + let gpgids = [] + let choices = "The name \"" . a:name . "\" is ambiguous. Please select the correct key:\n" + for line in lines + let fields = split(line, ":") + " search for the next uid + if (pubseen == 1) + if (fields[0] == "uid") + let choices = choices . " " . fields[9] . "\n" + else + let pubseen = 0 + endif + endif + + " search for the next pub + if (pubseen == 0) + if (fields[0] == "pub") + let identity = fields[4] + let gpgids += [identity] + if exists("*strftime") + let choices = choices . counter . ": ID: 0x" . identity . " created at " . strftime("%c", fields[5]) . "\n" + else + let choices = choices . counter . ": ID: 0x" . identity . "\n" + endif + let counter = counter+1 + let pubseen = 1 + endif + endif + + endfor + + " counter > 1 means we have more than one results + let answer = 0 + if (counter > 1) + let choices = choices . "Enter number: " + let answer = input(choices, "0") + while (answer == "") + let answer = input("Enter number: ", "0") + endwhile + endif + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGIDToName()") + return get(gpgids, answer, "") +endfunction + +" Function: s:GPGIDToName(identity) {{{2 +" +" find name corresponding to a GPG key ID +" Returns: Name for the given ID +" +function s:GPGIDToName(identity) + call s:GPGDebug(3, ">>>>>>>> Entering s:GPGIDToName()") + + " TODO is the encryption subkey really unique? + + " ask gpg for the id for a name + let commandline = s:GPGCommand . " --quiet --with-colons --fixed-list-mode --list-keys " . a:identity + call s:GPGDebug(2, "command: ". commandline) + let &shellredir = s:shellredir + let &shell = s:shell + let output = system(commandline) + let &shellredir = s:shellredirsave + let &shell = s:shellsave + call s:GPGDebug(2, "output: ". output) + + " when called with "--with-colons" gpg encodes its output _ALWAYS_ as UTF-8, + " so convert it, if necessary + if (&encoding != "utf-8") + let output = iconv(output, "utf-8", &encoding) + endif + let lines = split(output, "\n") + + " parse the output of gpg + let pubseen = 0 + let uid = "" + for line in lines + let fields = split(line, ":") + if (pubseen == 0) " search for the next pub + if (fields[0] == "pub") + let pubseen = 1 + endif + else " search for the next uid + if (fields[0] == "uid") + let pubseen = 0 + if exists("*strftime") + let uid = fields[9] . s:GPGMagicString . "(ID: 0x" . a:identity . " created at " . strftime("%c", fields[5]) . ")" + else + let uid = fields[9] . s:GPGMagicString . "(ID: 0x" . a:identity . ")" + endif + break + endif + endif + endfor + + call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGIDToName()") + return uid +endfunction + +" Function: s:GPGDebug(level, text) {{{2 +" +" output debug message, if this message has high enough importance +" only define function if GPGDebugLevel set at all +" +function s:GPGDebug(level, text) + if exists("g:GPGDebugLevel") && g:GPGDebugLevel >= a:level + if exists("g:GPGDebugLog") + execute "redir >> " . g:GPGDebugLog + echom "GnuPG: " . a:text + redir END + else + echom "GnuPG: " . a:text + endif + endif +endfunction + +" Section: Commands {{{1 + +command! GPGViewRecipients call s:GPGViewRecipients() +command! GPGEditRecipients call s:GPGEditRecipients() +command! GPGViewOptions call s:GPGViewOptions() +command! GPGEditOptions call s:GPGEditOptions() + +" Section: Menu {{{1 + +if (has("menu")) + amenu <silent> Plugin.GnuPG.View\ Recipients :GPGViewRecipients<CR> + amenu <silent> Plugin.GnuPG.Edit\ Recipients :GPGEditRecipients<CR> + amenu <silent> Plugin.GnuPG.View\ Options :GPGViewOptions<CR> + amenu <silent> Plugin.GnuPG.Edit\ Options :GPGEditOptions<CR> +endif + +" vim600: set foldmethod=marker foldlevel=0 : |