Mercurial > vim
view runtime/indent/occam.vim @ 33664:06b59278bfcf v9.0.2070
patch 9.0.2070: [security] disallow setting env in restricted mode
Commit: https://github.com/vim/vim/commit/6b89dd6a7257a1e2e9c7ea070b407bc4674a5118
Author: Christian Brabandt <cb@256bit.org>
Date: Thu Oct 26 22:14:17 2023 +0200
patch 9.0.2070: [security] disallow setting env in restricted mode
Problem: [security] disallow setting env in restricted mode
Solution: Setting environment variables in restricted mode could
potentially be used to execute shell commands. Disallow this.
restricted mode: disable allow setting of environment variables
Setting environment variables in restricted mode, may have some unwanted
consequences. So, for example by setting $GCONV_PATH in restricted mode
and then calling the iconv() function, one may be able to execute some
unwanted payload, because the `iconv_open()` function internally uses
the `$GCONV_PATH` variable to find its conversion data.
So let's disable setting environment variables, even so this is no
complete protection, since we are not clearing the existing environment.
I tried a few ways but wasn't successful :(
One could also argue to disable the iconv() function completely in
restricted mode, but who knows what other API functions can be
influenced by setting some other unrelated environment variables.
So let's leave it as it is currently.
closes: #13394
See: https://huntr.com/bounties/b0a2eda1-459c-4e36-98e6-0cc7d7faccfe/
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Thu, 26 Oct 2023 22:30:03 +0200 |
parents | 6dd88e45d47d |
children |
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" Vim indent file " Language: occam " Maintainer: Mario Schweigler <ms44@kent.ac.uk> (Invalid email address) " Doug Kearns <dougkearns@gmail.com> " Last Change: 2022 Apr 06 " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 "{{{ Settings " Set the occam indent function setlocal indentexpr=GetOccamIndent() " Indent after new line and after initial colon setlocal indentkeys=o,O,0=: "}}} let b:undo_indent = "setl inde< indk<" " Only define the function once if exists("*GetOccamIndent") finish endif let s:keepcpo= &cpo set cpo&vim "{{{ Indent definitions " Define carriage return indent let s:FirstLevelIndent = '^\C\s*\(IF\|ALT\|PRI\s\+ALT\|PAR\|SEQ\|PRI\s\+PAR\|WHILE\|VALOF\|CLAIM\|FORKING\)\>\|\(--.*\)\@<!\(\<PROC\>\|??\|\<CASE\>\s*\(--.*\)\=\_$\)' let s:FirstLevelNonColonEndIndent = '^\C\s*PROTOCOL\>\|\(--.*\)\@<!\<\(\(CHAN\|DATA\)\s\+TYPE\|FUNCTION\)\>' let s:SecondLevelIndent = '^\C\s*\(IF\|ALT\|PRI\s\+ALT\)\>\|\(--.*\)\@<!?\s*\<CASE\>\s*\(--.*\)\=\_$' let s:SecondLevelNonColonEndIndent = '\(--.*\)\@<!\<\(CHAN\|DATA\)\s\+TYPE\>' " Define colon indent let s:ColonIndent = '\(--.*\)\@<!\<PROC\>' let s:ColonNonColonEndIndent = '^\C\s*PROTOCOL\>\|\(--.*\)\@<!\<\(\(CHAN\|DATA\)\s\+TYPE\|FUNCTION\)\>' let s:ColonEnd = '\(--.*\)\@<!:\s*\(--.*\)\=$' let s:ColonStart = '^\s*:\s*\(--.*\)\=$' " Define comment let s:CommentLine = '^\s*--' "}}} "{{{ function GetOccamIndent() " Auxiliary function to get the correct indent for a line of occam code function GetOccamIndent() " Ensure magic is on let save_magic = &magic setlocal magic " Get reference line number let linenum = prevnonblank(v:lnum - 1) while linenum > 0 && getline(linenum) =~ s:CommentLine let linenum = prevnonblank(linenum - 1) endwhile " Get current indent let curindent = indent(linenum) " Get current line let line = getline(linenum) " Get previous line number let prevlinenum = prevnonblank(linenum - 1) while prevlinenum > 0 && getline(prevlinenum) =~ s:CommentLine let prevlinenum = prevnonblank(prevlinenum - 1) endwhile " Get previous line let prevline = getline(prevlinenum) " Colon indent if getline(v:lnum) =~ s:ColonStart let found = 0 while found < 1 if line =~ s:ColonStart let found = found - 1 elseif line =~ s:ColonIndent || (line =~ s:ColonNonColonEndIndent && line !~ s:ColonEnd) let found = found + 1 endif if found < 1 let linenum = prevnonblank(linenum - 1) if linenum > 0 let line = getline(linenum) else let found = 1 endif endif endwhile if linenum > 0 let curindent = indent(linenum) else let colonline = getline(v:lnum) let tabstr = '' while strlen(tabstr) < &tabstop let tabstr = ' ' . tabstr endwhile let colonline = substitute(colonline, '\t', tabstr, 'g') let curindent = match(colonline, ':') endif " Restore magic if !save_magic|setlocal nomagic|endif return curindent endif if getline(v:lnum) =~ '^\s*:' let colonline = getline(v:lnum) let tabstr = '' while strlen(tabstr) < &tabstop let tabstr = ' ' . tabstr endwhile let colonline = substitute(colonline, '\t', tabstr, 'g') let curindent = match(colonline, ':') " Restore magic if !save_magic|setlocal nomagic|endif return curindent endif " Carriage return indenat if line =~ s:FirstLevelIndent || (line =~ s:FirstLevelNonColonEndIndent && line !~ s:ColonEnd) \ || (line !~ s:ColonStart && (prevline =~ s:SecondLevelIndent \ || (prevline =~ s:SecondLevelNonColonEndIndent && prevline !~ s:ColonEnd))) let curindent = curindent + shiftwidth() " Restore magic if !save_magic|setlocal nomagic|endif return curindent endif " Commented line if getline(prevnonblank(v:lnum - 1)) =~ s:CommentLine " Restore magic if !save_magic|setlocal nomagic|endif return indent(prevnonblank(v:lnum - 1)) endif " Look for previous second level IF / ALT / PRI ALT let found = 0 while !found if indent(prevlinenum) == curindent - shiftwidth() let found = 1 endif if !found let prevlinenum = prevnonblank(prevlinenum - 1) while prevlinenum > 0 && getline(prevlinenum) =~ s:CommentLine let prevlinenum = prevnonblank(prevlinenum - 1) endwhile if prevlinenum == 0 let found = 1 endif endif endwhile if prevlinenum > 0 if getline(prevlinenum) =~ s:SecondLevelIndent let curindent = curindent + shiftwidth() endif endif " Restore magic if !save_magic|setlocal nomagic|endif return curindent endfunction "}}} let &cpo = s:keepcpo unlet s:keepcpo