From: Paul Hänsch Date: Fri, 18 Feb 2022 15:04:27 +0000 (+0100) Subject: Squashed 'cgilite/' content from commit 1d27862 X-Git-Url: https://git.plutz.net/?a=commitdiff_plain;h=fc078f8f292eb97889e014ad7b76682c134c6df8;p=shellwiki Squashed 'cgilite/' content from commit 1d27862 git-subtree-dir: cgilite git-subtree-split: 1d27862fc4c0ced76afb8bdfa04a9ab0f50208ef --- fc078f8f292eb97889e014ad7b76682c134c6df8 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..5c9950a --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +cgilite +serverkey +users.db diff --git a/cgilite.sh b/cgilite.sh new file mode 100755 index 0000000..90d6557 --- /dev/null +++ b/cgilite.sh @@ -0,0 +1,347 @@ +#!/bin/sh + +# Copyright 2017 - 2021 Paul Hänsch +# +# This is CGIlite. +# A collection of posix shell functions for writing CGI scripts. +# +# CGIlite is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# CGIlite is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with CGIlite. If not, see . + +[ -n "$include_cgilite" ] && return 0 +# guard set after webserver part + +# ksh and zsh workaround +# set -o posix # ksh, not portable +setopt -o OCTAL_ZEROES 2>&- + +# Integrated webserver request timeout +cgilite_timeout=2 + +# General environment variables +# $_EXEC - directory containing application itself +# $_DATA - direcotry where application data may be stored +# $_BASE - optional prefix for http path, e.g. "/myapp" +# +# Programmers should take care to use those variables throughout the +# application. +# Variables may be set via CLI argument, in environment, or left as default. + +for cgilite_arg in "$@"; do case $cgilite_arg in + --exec=*) _EXEC="${cgilite_arg#*=}";; + --data=*) _DATA="${cgilite_arg#*=}";; + --base=*) _BASE="${cgilite_arg#*=}";; +esac; done +unset cgilite_arg + +_EXEC="${_EXEC:-${0%/*}}" +_DATA="${_DATA:-.}" +_EXEC="${_EXEC%/}" _DATA="${_DATA%/}" _BASE="${_BASE%/}" + +export _EXEC _DATA _BASE + +# Carriage Return and Line Break characters for convenience +CR=" " +BR=' +' + +PATH(){ + local str seg out + # normalize path + # read from stdin if no arguments are provided + + [ $# -eq 0 ] && str="$(cat)" || str="$*" + while [ "$str" ]; do + seg=${str%%/*}; str="${str#*/}" + case $seg in + ..) out="${out%/}"; out="${out%/*}/";; + .|'') out="${out%/}/";; + *) out="${out%/}/${seg}";; + esac; + [ "$seg" = "$str" ] && break + done + [ "${str}" -a "${out}" ] && printf %s "$out" || printf %s/ "${out%/}" +} + +HEX_DECODE(){ + local pfx="$1" in="$2" out + # Print out Data encoded as Hex + # + # Arguments: + # pfx - required, prefix for a hex tupel, e.g. "\x", "%" "\", may be empty + # in - required, string to be decoded + # + # anything that does not constitute a tupel of valid Hex numerals + # will be copied to the output literally + + while [ "$in" ]; do + case $in in + "$pfx"[0-9a-fA-F][0-9a-fA-F]*) in="${in#${pfx}}";; + \\*) in="${in#?}"; out="${out}\\\\"; continue;; + %*) in="${in#?}"; out="${out}%%"; continue;; + *) out="${out}${in%"${in#?}"}"; in="${in#?}"; continue;; + esac; + + # Hex escapes for printf (e.g. \x41) are not portable + # The portable way for Hex output is transforming Hex to Octal + # (e.g. \x41 = \101) + case $in in + [0123]?*) out="${out}\\0";; + [4567]?*) out="${out}\\1";; + [89aAbB]?*) out="${out}\\2";; + [c-fC-F]?*) out="${out}\\3";; + esac + case $in in + [048cC][0-7]*) out="${out}0";; + [048cC][89a-fA-F]*) out="${out}1";; + [159dD][0-7]*) out="${out}2";; + [159dD][89a-fA-F]*) out="${out}3";; + [26aAeE][0-7]*) out="${out}4";; + [26aAeE][89a-fA-F]*) out="${out}5";; + [37bBfF][0-7]*) out="${out}6";; + [37bBfF][89a-fA-F]*) out="${out}7";; + esac + case $in in + ?[08]*) out="${out}0";; + ?[19]*) out="${out}1";; + ?[2aA]*) out="${out}2";; + ?[3bB]*) out="${out}3";; + ?[4cC]*) out="${out}4";; + ?[5dD]*) out="${out}5";; + ?[6eE]*) out="${out}6";; + ?[7fF]*) out="${out}7";; + esac + in="${in#?}" + in="${in#?}" + done + printf -- "$out" +} + +if [ -z "$REQUEST_METHOD" ]; then + # no webserver variables means we are running via inetd / ncat + # so use builtin web server + + # Use env from inetd as webserver variables + REMOTE_ADDR="${TCPREMOTEIP}" + SERVER_NAME="${TCPLOCALIP}" + SERVER_PORT="${TCPLOCALPORT}" + + # Wait 2 seconds for request or kill connection through watchdog. + # Once Request is received the watchdog will be suspended (killed). + # At the end of the loop the watchdog will be restarted to enable + # timeout for the subsequent request. + + (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$! + while read REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL; do + [ "${SERVER_PROTOCOL#HTTP/1.[01]${CR}}" ] && break + kill $cgilite_watchdog + + SERVER_PROTOCOL="${SERVER_PROTOCOL%${CR}}" + PATH_INFO="$(HEX_DECODE % "${REQUEST_URI%\?*}" |PATH)" + [ "${REQUEST_URI}" = "${REQUEST_URI#*\?}" ] \ + && QUERY_STRING='' \ + || QUERY_STRING="${REQUEST_URI#*\?}" + cgilite_headers=''; while read -r hl; do + hl="${hl%${CR}}"; [ "$hl" ] || break + case $hl in + 'Content-Length: '*) CONTENT_LENGTH="${hl#*: }";; + 'Content-Type: '*) CONTENT_TYPE="${hl#*: }";; + esac + cgilite_headers="${cgilite_headers}${hl}${BR}" + done + + export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \ + PATH_INFO QUERY_STRING CONTENT_TYPE CONTENT_LENGTH + + # Try to serve multiple requests, provided that script serves a + # Content-Length header. + # Without Content-Length header, connection will terminate after + # script. + + cgilite_status='200 OK'; cgilite_response=''; cgilite_cl="Connection: close${CR}${BR}"; + . "$0" | while read -r l; do case $l in + Status:*) + cgilite_status="${l#Status: }";; + Content-Length:*) + cgilite_cl="" + cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";; + Connection:*) + cgilite_cl="${l}${BR}";; + $CR) printf '%s %s\r\n%s%s\r\n' \ + 'HTTP/1.1' "${cgilite_status%${CR}}" \ + "${cgilite_response}${cgilite_response:+${BR}}" "${cgilite_cl}" + cat || kill $$ + [ "${cgilite_cl#Connection}" = "${cgilite_cl}" ]; exit;; + *) cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";; + esac; done || exit 0; + (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$! + done + kill $cgilite_watchdog + exit 0 +fi + +include_cgilite="$0" + +if [ "${REQUEST_METHOD}" = POST -a "${CONTENT_LENGTH:-0}" -gt 0 -a \ + "${CONTENT_TYPE}" = "application/x-www-form-urlencoded" ]; then + cgilite_post="$(head -c "$CONTENT_LENGTH")" +fi + +PATH_INFO="$(PATH "/${PATH_INFO#${_BASE}}")" + +debug(){ [ $# -gt 0 ] && printf '%s\n' "$@" >&2 || tee -a /dev/stderr; } +[ "${DEBUG+x}" ] && env >&2 + +# general helper functions, see GET, POST, and REF below + +cgilite_count(){ + printf %s "&$1" \ + | grep -oE '&'"$2"'=[^&]*' \ + | wc -l +} + +cgilite_value(){ + local str="&$1" name="$2" cnt="${3:-1}" + while [ $cnt -gt 0 ]; do + [ "${str}" = "${str#*&${name}=}" ] && return 1 + str="${str#*&${name}=}" + cnt=$((cnt - 1)) + done + HEX_DECODE % "$(printf %s "${str%%&*}" |tr + \ )" +} + +cgilite_keys(){ + local str="&$1" + while [ "${str#*&}" != "${str}" ]; do + str="${str#*&}" + printf '%s\n' "${str%%=*}" + done \ + | sort -u +} + +# Read arguments from GET, POST, or the query string of the referrer (REF). +# Example: +# GET varname n +# +# where n is number for the Nth occurence of a variable and defaults to 1 +# +# *_COUNT varname +# -> returns number of ocurences +# *_KEYS +# -> returns list of available varnames + +GET(){ cgilite_value "${QUERY_STRING}" "$@"; } +GET_COUNT(){ cgilite_count "${QUERY_STRING}" $1; } +GET_KEYS(){ cgilite_keys "${QUERY_STRING}"; } + +POST(){ cgilite_value "${cgilite_post}" "$@"; } +POST_COUNT(){ cgilite_count "${cgilite_post}" $1; } +POST_KEYS(){ cgilite_keys "${cgilite_post}"; } + +REF(){ cgilite_value "${HTTP_REFERER#*\?}" "$@"; } +REF_COUNT(){ cgilite_count "${HTTP_REFERER#*\?}" $1; } +REF_KEYS(){ cgilite_keys "${HTTP_REFERER#*\?}"; } + +HEADER(){ + # Read value of header line. Use this instead of + # referencing HTTP_* environment variables. + if [ -n "${cgilite_headers+x}" ]; then + local str="${BR}${cgilite_headers}" + [ "${str}" = "${str#*${BR}${1}: }" ] && return 1 + str="${str#*${BR}${1}: }" + printf %s "${str%%${BR}*}" + else + local var="HTTP_$(printf %s "$1" |tr a-z- A-Z-)" + eval "[ \"\$$var\" ] && printf %s \"\$$var\" || return 1" + # eval "printf %s \"\$HTTP_$(printf %s "${1}" |tr a-z A-Z |tr -c A-Z _)\"" + fi +} + +COOKIE(){ + # Read value of cookie + HEX_DECODE % "$( + HEADER Cookie \ + | grep -oE '(^|; ?)'"$1"'=[^;]*' \ + | sed -En "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}' + )" +} + +HTML(){ + # Escape HTML cahracters + # Also escape [, ], and \n for use in html-sh + local str out + [ $# -eq 0 ] && str="$(cat)" || str="$*" + while [ "$str" ]; do case $str in + \&*) out="${out}&"; str="${str#?}";; + \<*) out="${out}<"; str="${str#?}";; + \>*) out="${out}>"; str="${str#?}";; + \"*) out="${out}""; str="${str#?}";; + \'*) out="${out}'"; str="${str#?}";; + \[*) out="${out}["; str="${str#?}";; + \]*) out="${out}]"; str="${str#?}";; + "${CR}"*) out="${out} "; str="${str#?}";; + "${BR}"*) out="${out} "; str="${str#?}";; + *) out="${out}${str%%[]&<>\"\'[]*}"; str="${str#"${str%%[]&<>\"\'[]*}"}";; + esac; done + printf %s "$out" +} + +URL(){ + # Escape pathes, so they can be used in link tags and HTTP Headers + local str out + [ $# -eq 0 ] && str="$(cat)" || str="$*" + while [ "$str" ]; do case $str in + \&*) out="${out}%26"; str="${str#?}";; + \"*) out="${out}%22"; str="${str#?}";; + \'*) out="${out}%27"; str="${str#?}";; + \?*) out="${out}%3F"; str="${str#?}";; + \#*) out="${out}%23"; str="${str#?}";; + \[*) out="${out}%5B"; str="${str#?}";; + \]*) out="${out}%5D"; str="${str#?}";; + \ *) out="${out}%20"; str="${str#?}";; + " "*) out="${out}%09"; str="${str#?}";; + "${CR}"*) out="${out}%0D"; str="${str#?}";; + "${BR}"*) out="${out}%0A"; str="${str#?}";; + %*) out="${out}%25"; str="${str#?}";; + *) out="${out}${str%%[]&\"\'\?# ${CR}${BR}%[]*}"; str="${str#"${str%%[]&\"\'\?# ${CR}${BR}%[]*}"}";; + esac; done + printf %s "$out" +} + +SET_COOKIE(){ + # Param: session | +seconds | [date] + # Param: name=value + # Param: Path= | Domain= | Secure + local expire cookie + case "$1" in + ''|0|session) expire='';; + [+-][0-9]*) expire="$(date -R -d @$(($(date +%s) + $1)))";; + *) expire="$(date -R -d "$1")";; + esac + cookie="$2" + + printf 'Set-Cookie: %s; HttpOnly; SameSite=Lax' "$cookie" + [ -n "$expire" ] && printf '; Expires=%s' "${expire%+????}${expire:+GMT}" + [ $# -ge 3 ] && shift 2 && printf '; %s' "$@" + printf '\r\n' +} + +REDIRECT(){ + # Trigger redirct and terminate script + printf '%s: %s\r\n' \ + Status "303 See Other" \ + Content-Length 0 \ + Location "$*" + printf '\r\n' + exit 0 +} diff --git a/common.css b/common.css new file mode 100644 index 0000000..71bead6 --- /dev/null +++ b/common.css @@ -0,0 +1,143 @@ +/* ======= GENERIC HTML STYLES ======= */ + +* { + box-sizing: border-box; + position: relative; + font: inherit; + text-decoration: inherit; + color: inherit; background: transparent; + max-width: 100%; + margin: 0; padding: 0; + border: none; +} + +body { + font: normal normal normal medium/1.5em sans-serif; + color: #000; background: #FFF; +} + +ul, ol, dl, table, p { margin-bottom: .5em; } + +a { + font-style: italic; + text-decoration: underline; + color: #068; +} +a.button { + font-style: inherit; + text-decoration: inherit; + color: inherit; +} + +sup { vertical-align: super; } +sub { vertical-align: sub; } +small { font-size: .75em; } +big { font-size: 1.25em; } +strike, del, s { text-decoration: line-through; } +u {text-decoration: underline; } +i, em { font-style: italic; } +b, strong { font-weight: bolder; } +tt, code, var, samp, kbd { font-family: monospace; } +kbd { font-style: italic; } + +ul, ol { margin-left: 1.125em; } +dl dt { font-weight: bolder; } +table th { font-weight: bold; } + +h1, h2, h3 { + font-weight: bold; + margin-top: .75em; + margin-bottom: .5em; +} + +h4, h5, h6, form legend { + font-weight: bolder; + margin-bottom: .25em; +} + +h1 { font-size: 1.5em; } +h2 { font-size: 1.125em; } + +select, input, button, textarea, a.button { + display: inline-block; + color: #000; background-color: #FFF; + border: .5pt solid; + padding: .25em .75em; + vertical-align: text-bottom; + border: .5pt solid #000; + border-radius: 2pt; +} +select { padding: .375em 0; } +textarea { min-height: 7em; } + +input[type=radio], input[type=checkbox] { + vertical-align: baseline; +} +input[type=number] { text-align: right; padding-right: 0; } + +button, input[type=button], a.button { + box-shadow: .125em .125em .25em; + cursor: pointer; +} +input[type=radio], input[type=checkbox], label[for] { + cursor: pointer; +} + +label { margin-right: .75em; } +input + label { + margin-left: .375em; +} + +@media print { + @page { margin: 20mm; } + + h1 { text-align: center; } + + h1, h2, h3, h4, h5, h6, form legend { + page-break-inside: avoid; + page-break-after: avoid; + page-break-before: auto; + } + li { page-break-inside: avoid; } + th, dt { page-break-after: avoid; } +} + +/* ======= End Generic Styles ======= */ + +/* ======= Common Styles ======= */ + +*[tooltip]:hover:after { + display: block; + position: absolute; + min-width: 12em; + bottom: 100%; left: 50%; transform: translate(-50%, 0); + content: attr(tooltip); + padding: .5em; + color: #000; background-color: #FFC; + border: .5pt solid; + z-index: 1; +} + +input[type=radio].tab { display: none; } +input[type=radio].tab + label { + display: table-cell; + padding: .5em 1em; + color: #000; background-color: #EEE; + border: .5pt solid; +} +input[type=radio].tab:checked + label { + background-color: #FFF; + border-bottom: none; + box-shadow: .125em -.125em .125em #888; + z-index: 1; +} +input[type=radio].tab ~ *.tab { + display: none; + width: 100%; + margin-top: -.5pt; padding: .25em .75em; + border: .5pt solid; + border-radius: 0; + box-shadow: .125em .125em .125em #888; +} + +/* ======= End Common Styles ======= */ diff --git a/file.sh b/file.sh new file mode 100755 index 0000000..6f956df --- /dev/null +++ b/file.sh @@ -0,0 +1,125 @@ +#!/bin/sh + +# Copyright 2016 - 2019 Paul Hänsch +# +# This file is part of cgilite. +# +# cgilite is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# cgilite is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with cgilite. If not, see . + +[ -n "$include_fileserve" ] && return 0 +include_fileserve="$0" + +file_type(){ + case ${1##*.} in + html|html) printf 'text/html';; + css) printf 'text/css';; + js) printf 'text/javascript';; + txt) printf 'text/plain';; + sh) printf 'text/shellscript';; + jpg|jpeg) printf 'image/jpeg';; + png) printf 'image/png';; + svg) printf 'image/svg+xml';; + gif) printf 'image/gif';; + webm) printf 'video/webm';; + mp4|m4v) printf 'video/mp4';; + m4a) printf 'audio/mp4';; + ogg) printf 'audio/ogg';; + xml) printf 'application/xml';; + m3u8) printf 'application/x-mpegURL';; + ts) printf 'video/MP2T';; + mpd) printf 'application/dash+xml';; + m4s) printf 'video/iso.segment';; + *) printf 'application/octet-stream';; + esac +} + +FILE(){ + local file file_size file_date http_date cachedate range mime + file="$1" mime="$2" + + if ! [ -f "$file" ]; then + printf 'Content-Length: 0\r\nStatus: 404 Not Found\r\n\r\n' + exit 0 + elif ! [ -r "$file" ]; then + printf 'Content-Length: 0\r\nStatus: 403 Forbidden\r\n\r\n' + exit 0 + fi + + file_size="$(stat -Lc %s "$file")" + file_date="$(stat -Lc %Y "$file")" + http_date="$(date -ud "@$file_date" +"%a, %d %b %Y %T GMT")" + cachedate="$( + # Parse the allowable date formats from Section 3.3.1 of + # https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html + HEADER If-Modified-Since \ + | sed -E 's;^[^ ]+, ([0-9]{2}) (...) ([0-9]{4}) (..:..:..) GMT$;\3-\2-\1 \4;; + s;^[^ ]+, ([0-9]{2})-(...)-([789][0-9]) (..:..:..) GMT$;19\3-\2-\1 \4;; + s;^[^ ]+, ([0-9]{2})-(...)-([0-6][0-9]) (..:..:..) GMT$;20\3-\2-\1 \4;; + s;^[^ ]+ (...) ([0-9]{2}) (..:..:..) ([0-9]{4})$;\4-\1-\2 \3;; + s;^[^ ]+ (...) ([0-9]) (..:..:..) ([0-9]{4})$;\4-\1-\2 \3;; + s;Jan;01;; s;Feb;02;; s;Mar;03;; s;Apr;04;; s;May;05;; s;Jun;06;; + s;Jul;07;; s;Aug;08;; s;Sep;09;; s;Oct;10;; s;Nov;11;; s;Dec;12;;' \ + | xargs -r0 date +%s -ud 2>&- + )" + + range="$(HEADER Range |sed -nE 's;^bytes=([0-9]+-[0-9]*|-[0-9]+)$;\1;p;q;')" + case "$range" in + *-) range="${range}$((file_size - 1))";; + -*) [ ${range#-} -le $file_size ] \ + && range="$((file_size - ${range#-}))-$((file_size - 1))" \ + || range="0-$((file_size - 1))";; + *-*) [ ${range#*-} -ge $file_size ] \ + && range="${range%-*}-$((file_size - 1))";; + esac + + if [ "$file_date" -lt "$cachedate" ] 2>&-; then + printf '%s: %s\r\n' \ + Status '304 Not Modified' \ + Content-Length 0 \ + Last-Modified "$http_date" + printf '\r\n' + + elif [ -z "$range" ]; then + printf '%s: %s\r\n' \ + Status "200 OK" \ + Accept-Ranges bytes \ + Last-Modified "$http_date" \ + Content-Type "${mime:-$(file_type "$file")}" \ + Content-Length $file_size + printf '\r\n' + + [ "$REQUEST_METHOD" != HEAD ] && cat "$file" + + elif [ "${range%-*}" -le "${range#*-}" ]; then + printf '%s: %s\r\n' \ + Status "206 Partial Content" \ + Accept-Ranges bytes \ + Last-Modified "$http_date" \ + Content-Type "${mime:-$(file_type "$file")}" \ + Content-Range "bytes ${range}/${file_size}" \ + Content-Length "$((${range#*-} - ${range%-*} + 1))" + printf '\r\n' + + [ "$REQUEST_METHOD" != HEAD ] \ + && tail -c+$((${range%-*} + 1)) "$file" \ + | head -c "$((${range#*-} - ${range%-*} + 1))" + + elif [ "${range%-*}" -gt "${range#*-}" ]; then + printf '%s: %s\r\n' \ + Status "216 Range Not Satisfiable" \ + Content-Length 0 \ + Content-Range \*/${file_size} + printf '\r\n' + fi +} diff --git a/html-sh.sed b/html-sh.sed new file mode 100755 index 0000000..8d7b61c --- /dev/null +++ b/html-sh.sed @@ -0,0 +1,69 @@ +#!/bin/sed -nEf + +:Escapes +s,\\\\,\\,g; s,\\&,\&,g; +s,\\<,\<,g; s,\\>,\>,g; +s,\\",\",g; s,\\',\',g; +s,\\\[,\[,g; s,\\\],\],g; +s,\\\.,\.,g; s,\\#,\#,g; +s,\\,,g; + +:CommentHandle +x; /^<\/!-->/{ + x; /--]/{ + H; s;^(.*)--].*$;\1-->;p; + g; s;^.*--]([^\n]*)$;\1; + x; s;^\n(.*)\n[^\n]*$;\1;; x; + bCommentEnd + } + p; b; +} +x; +:CommentEnd + +:shortcuts +s;\[hidden[ \t]+"([^"]*)"[ \t]+"([^"]*)";[input type="hidden" name="\1" value="\2";g; +s;\[checkbox[ \t]+"([^"]*)"[ \t]+"([^"]*)";[input type="checkbox" name="\1" value="\2";g; +s;\[radio[ \t]+"([^"]*)"[ \t]+"([^"]*)";[input type="radio" name="\1" value="\2";g; +s;\[submit[ \t]+"([^"]*)"[ \t]+"([^"]*)";[button type="submit" name="\1" value="\2";g; +s;\[a[ \t]+"([^"]*)";[a href="\1";g; +s;\[img[ \t]+"([^"]*)"[ \t]+"([^"]*)";[img src="\1" alt="\2";g; + +s;\[!([^]\[]*)\];;g; +s;\[!--([^]\[]*)--\];;g; + +:tags +s;\[([^]\[< \t]+)([^]\[]*)\];<\1>\2;g; +t tags; + +G; +:tagclose +s;^([^]\n]*)\]([^\n]*)\n([^\n]+);\1\3\2; +t tagclose; +h; s;^([^\n]*)\n;;; x; s;\n.*$;;; + +:tagopen +s;^([^\[\n]*)\[([^]\[< \t\n]+)([^\n]*);\1<\2>\3\n; +t tagopen; +G; h; s;^[^\n]*\n+;;; x; s;\n.*$;;; + +:attribs +s;class="([^>]+)>[ \t]*\.([^< \t]+);class="\2 \1>;g; t attribs; +s;(<[^/][^>]*)>[ \t]*\.([^< \t]+);\1 class="\2">;g; +s;(<[^/][^>]*)>[ \t]*#([^< \t]+);\1 id="\2">;g; +s;(<[^/][^>]*)>[ \t]*([^ \t=<]+=("[^"]*"|'[^']*'|[^< \t]*));\1 \2>;g; +t attribs; +s;(]+ )?type=(radio|"radio"|'radio')( [^>]+)?)>[ \t]*(checked|selected);\1 checked="checked">;g; +s;(]+ )?type=(checkbox|"checkbox"|'checkbox')( [^>]+)?)>[ \t]*(checked|selected);\1 checked="checked">;g; +s;(]+)?)>[ \t]*(checked|selected);\1 selected="selected">;g; +s;(]+)?)>[ \t]*multiple;\1 multiple="multiple">;g; +t attribs; +s;(<[^/][^>]*>)[ \t]*\.[ \t];\1;g; + +s;(<[^/][^>]*>)[ \t]*;\1;g; +# s;(<[^/][^>]*)>[ \t]*]+>;\1/>;g; +s;(<(br|hr|img|input|link|meta|area|base|col|command|embed|keygen|param|source|track|wbr)[^>]*)>[ \t]*;\1>;g; + +s;;|<\?([^\?]|\?[^>])*\?>|]*>|])*\]\]>|<\/[A-Za-z][A-Za-z0-9-]*[[:space:]]*>|<[A-Za-z][A-Za-z0-9-]*([[:space:]]+[A-Za-z_:][A-Za-z0-9_\.:-]*([[:space:]]*=[[:space:]]*([[:space:]"'=<>`]+|"[^"]*"|'[^']*'))?)*[[:space:]]*\/?>)/) ) { + len = RLENGTH; + return substr( line, 1, len) inline(substr(line, len + 1)); + + # Literal HTML entities + } else if ( match( line, /^&([a-zA-Z]{2,32}|#[0-9]{1,7}|#[xX][0-9a-fA-F]{1,6});/) ) { + len = RLENGTH; + return substr( line, 1, len ) inline(substr(line, len + 1)); + + # Escape lone HTML character + } else if ( match( line, /^[&<>"']/) ) { + return HTML(substr(line, 1, 1)) inline(substr(line, 2)); + + # continue walk over string + } else { + return substr(line, 1, 1) inline( substr(line, 2) ); + } +} + +function _block( block, LOCAL, st, len, hlvl, htxt, guard, code, indent ) { + gsub( /^\n+|\n+$/, "", block ); + + if ( block == "" ) { + return ""; + + # HTML #2 #3 #4 $5 + } else if ( AllowHTML && match( block, /(^|\n) ? ? ?(|$)|<\?([^\?]|\?[^>])*(\?>|$)|]*(>|$)|])*(\]\]>|$))/) ) { + len = RLENGTH; st = RSTART; + return _block(substr(block, 1, st - 1)) substr(block, st, len) _block(substr(block, st + len)); + + # HTML #6 + } else if ( AllowHTML && match( tolower(block), /(^|\n) ? ? ?<\/?(address|article|aside|base|basefont|blockquote|body|caption|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption|figure|footer|form|frame|frameset|h[123456]|head|header|hr|html|iframe|legend|li|link|main|menu|menuitem|nav|noframes|ol|optgroup|option|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr|track|ul)([[:space:]\n>]|\/>)([^\n]|\n[ \t]*[^\n])*(\n[[:space:]]*\n|$)/) ) { + len = RLENGTH; st = RSTART; + return _block(substr(block, 1, st - 1)) substr(block, st, len) _block(substr(block, st + len)); + + # HTML #1 + } else if ( AllowHTML && match( tolower(block), /(^|\n) ? ? ?<(script|pre|style)([[:space:]\n>]).*(<\/script>|<\/pre>|<\/style>|$)/) ) { + len = RLENGTH; st = RSTART; + match( tolower(substr(block, st, len)), /(<\/script>|<\/pre>|<\/style>)/); + len = RSTART + RLENGTH; + return _block(substr(block, 1, st - 1)) substr(block, st, len) _block(substr(block, st + len)); + + # HTML #7 + } else if ( AllowHTML && match( block, /^ ? ? ?(<\/[A-Za-z][A-Za-z0-9-]*[[:space:]]*>|<[A-Za-z][A-Za-z0-9-]*([[:space:]]+[A-Za-z_:][A-Za-z0-9_\.:-]*([[:space:]]*=[[:space:]]*([[:space:]"'=<>`]+|"[^"]*"|'[^']*'))?)*[[:space:]]*\/?>)([[:space:]]*\n)([^\n]|\n[ \t]*[^\n])*(\n[[:space:]]*\n|$)/) ) { + len = RLENGTH; st = RSTART; + return substr(block, st, len) _block(substr(block, st + len)); + + # Blockquote (leading >) + } else if ( match( block, /^> /) ) { + match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match(block, /$/); + len = RLENGTH; st = RSTART; + return "
\n" _block( gensub( /(^|\n)> /, "\n", "g", substr(block, 1, st - 1) ) ) "
\n\n" \ + _block( substr(block, st + len) ); + + # Line Blocks (pandoc) + } else if ( match(block, /^\| [^\n]*(\n|$)(\| [^\n]*(\n|$)|[ \t]+[^\n[:space:]][^\n]*(\n|$))*/) ) { + len = RLENGTH; st = RSTART; + code = substr(block, 1, len); + gsub(/\n[[:space:]]+/, " ", code); + gsub(/\n\| /, "\n", code); + gsub(/^\| |\n$/, "", code); + return "
" gensub(/\n/, "
\n", "g", inline( code )) "
\n" \ + _block( substr( block, len + 1) ); + + # Indented Code Block + } else if ( match(block, /^( |\t)[^\n]+(\n|$)(( |\t)[^\n]+(\n|$)|[ \t]*(\n|$))*/) ) { + len = RLENGTH; st = RSTART; + code = substr(block, 1, len); + gsub(/(^|\n)( |\t)/, "\n", code); + gsub(/^\n|\n+$/, "", code); + return "
" HTML( code ) "
\n" \ + _block( substr( block, len + 1 ) ); + + # Fenced Code Block (pandoc) + } else if ( match( block, /^(~~~+|```+)/ ) ) { + guard = substr( block, 1, RLENGTH ); + code = gensub(/^[^\n]+\n/, "", 1, block); + if ( match(code, "(^|\n)" guard "+(\n|$)" ) ) { + len = RLENGTH; st = RSTART; + return "
" HTML( substr(code, 1, st - 1) ) "
\n" \ + _block( substr( code, st + len ) ); + } else { + match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match( block, /$/ ); + len = RLENGTH; st = RSTART; + return "

" inline( substr(block, 1, st - 1) ) "

\n" \ + _block( substr(block, st + len) ); + } + + # Unordered list + } else if ( match( block, "^ ? ? ?[-+*][ \t]+[^\n]+(\n|$)" \ + "(([ \t]*\n)* ? ? ?[-+*][ \t]+[^\n]+(\n|$)" \ + "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \ + "|[^\n]+(\n|$))*" ) ) { + list = substr( block, 1, RLENGTH); + block = substr( block, RLENGTH + 1); + indent = length( gensub(/[-+*][ \t]+[^\n]+.*$/, "", 1, list) ); + + gsub("(^|\n) {0," indent "}", "\n", list); + return "\n
    \n" _list( substr(list, 2) ) "
\n" _block( block ); + + # Ordered list + } else if ( match( block, "^ ? ? ?([0-9]+|#)\\.[ \t]+[^\n]+(\n|$)" \ + "(([ \t]*\n)* ? ? ?([0-9]+|#)\\.[ \t]+[^\n]+(\n|$)" \ + "|([ \t]*\n)*( ? ? ?\t| +)[^\n]+(\n|$)" \ + "|[^\n]+(\n|$))*" ) ) { + list = substr( block, 1, RLENGTH); + block = substr( block, RLENGTH + 1); + indent = length( gensub(/([0-9]+|#)\.[ \t]+[^\n]+.*$/, "", 1, list) ); + + gsub("(^|\n) {0," indent "}", "\n", list); + return "\n
    \n" _list( substr(list, 2) ) "
\n" _block( block ); + + # First Order Heading + } else if ( match( block, /^[^\n]+\n===+(\n|$)/ ) ) { + len = RLENGTH; + HL[1]++; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0; + return "

" inline( gensub( /\n.*$/, "", "g", block ) ) "

\n\n" \ + _block( substr( block, len + 1 ) ); + + # Second Order Heading + } else if ( match( block, /^[^\n]+\n---+(\n|$)/ ) ) { + len = RLENGTH; + HL[2]++; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0; + return "

" inline( gensub( /\n.*$/, "", "g", block ) ) "

\n\n" \ + _block( substr( block, len + 1) ); + + # Nth Order Heading + } else if ( match( block, /^#{1,6}[ \t]*[^\n]+([ \t]*#*)(\n|$)/ ) ) { + len = RLENGTH; + hlvl = length( gensub( /^(#{1,6}).*$/, "\\1", "g", block ) ); + htxt = gensub(/^#{1,6}[ \t]*(([^ \t\n]+|[ \t]+[^ \t\n#]|[ \t]+#+[^\n#])+)([ \t]*#*)(\n.*)?$/, "\\1", 1, block); + HL[hlvl]++; for ( n = hlvl + 1; n < 7; n++) { HL[n] = 0;} + hid = HL[1]; for ( n = 2; n <= hlvl; n++) { hid = hid "." HL[n] ; } + return "" inline( htxt ) "\n\n" \ + _block( substr( block, len + 1) ); + + # Horizontal rule + } else if ( match( block, /(^|\n) ? ? ?((\* *){3,}|(- *){3,}|(_ *){3,})($|\n)/) ) { + len = RLENGTH; st = RSTART; + return _block(substr(block, 1, st - 1)) "
\n" _block(substr(block, st + len)); + + # Plain paragraph + } else { + match( block, /(^|\n)[[:space:]]*(\n|$)/ ) || match( block, /$/ ); + len = RLENGTH; st = RSTART; + return "

" inline( substr(block, 1, st - 1) ) "

\n" \ + _block( substr(block, st + len) ); + } +} + +function _list( block, last, LOCAL, p) { + if ( ! length(block) ) return ""; + gsub(/^([-+*]|[0-9]+\.|#\.)( ? ? ?|\t)/, "", block) + + # slice next list item from input + if ( match( block, /\n([-+*]|[0-9]+\.|#\.)[ \t]+[^\n]+/) ) { + p = substr( block, 1, RSTART); + block = substr( block, RSTART + 1); + } else { + p = block; block = ""; + } + sub( /\n +([-+*]|[0-9]+\.|#\.)/, "\n&", p ); + + # if this should be a paragraph item + # either previous item (last) or current item (p) contains blank lines + if (match(last, /\n[[:space:]]*\n/) || match(p, /\n[[:space:]]*\n/) ) { + last = p; p = _block(p); + } else { + last = p; p = _block(p); + sub( /^

/, "", p ); + sub( /<\/p>\n/, "", p ); + } + sub( /\n$/, "", p ); + + # Task List (pandoc) + if ( p ~ /^\[ \].*/ ) { p = "" substr(p, 4); } + else if ( p ~ /^\[[xX]\].*/ ) { p = "" substr(p, 4); } + else if ( p ~ /^

\[ \].*/ ) { p = "

" substr(p, 7); } + else if ( p ~ /^

\[[xX]\].*/ ) { p = "

" substr(p, 7); } + return "

  • " p "
    • \n" _list( block, last ); +} + +BEGIN { + # Global Vars + file = ""; rl_href[""] = ""; rl_title[""] = ""; + if (ENVIRON["MD_HTML"] == "true") { AllowHTML = "true"; } + HL[1] = 0; HL[2] = 0; HL[3] = 0; HL[4] = 0; HL[5] = 0; HL[6] = 0; + + # Buffering of full file ist necessary, e.g. to find reference links + while (getline) { file = file $0 "\n"; } + # Clean up MS-DOS line breaks + gsub(/\r\n/, "\n", file); + + # Fill array of reference links + f = file; rl_id; + re_reflink = "(^|\n) ? ? ?\\[([^]\n]+)\\]: ([^ \t\n]+)(\n?[ \t]+(\"([^\"]+)\"|'([^']+)'|\\(([^)]+)\\)))?(\n|$)"; + # /(^|\n) ? ? ?\[([^]\n]+)\]: ([^ \t\n]+)(\n?[ \t]+("([^"]+)"|'([^']+)'|\(([^)]+)\)))?(\n|$)/ + while ( match(f, re_reflink ) ) { + rl_id = gensub( re_reflink, "\\2", 1, substr(f, RSTART, RLENGTH) ); + rl_href[rl_id] = gensub( re_reflink, "\\3", 1, substr(f, RSTART, RLENGTH) ); + rl_title[rl_id] = gensub( re_reflink, "\\5", 1, substr(f, RSTART, RLENGTH) ); + f = substr(f, RSTART + RLENGTH); + rl_title[rl_id] = substr( rl_title[rl_id], 2, length(rl_title[rl_id]) - 2 ); + if ( rl_href[rl_id] ~ /<.*>/ ) rl_href[rl_id] = substr( rl_href[rl_id], 2, length(rl_href[rl_id]) - 2 ); + } + # Clear reflinks from File + while( gsub(re_reflink, "\n", file ) ); + # for (n in rl_href) { debug(n " | " rl_href[n] " | " rl_title[n] ); } + + # Run Block Processing -> The Actual Markdown! + printf "%s", _block( file ); +} diff --git a/session.sh b/session.sh new file mode 100755 index 0000000..8fb6236 --- /dev/null +++ b/session.sh @@ -0,0 +1,140 @@ +#!/bin/sh + +[ -n "$include_session" ] && return 0 +include_session="$0" + +_DATE="$(date +%s)" +SESSION_TIMEOUT="${SESSION_TIMEOUT:-7200}" + +if ! which uuencode >/dev/null; then + uuencode() { busybox uuencode "$@"; } +fi +if ! which sha256sum >/dev/null; then + sha256sum() { busybox sha256sum "$@"; } +fi + +if which openssl >/dev/null; then + session_mac(){ { [ $# -gt 0 ] && printf %s "$*" || cat; } | openssl dgst -sha1 -hmac "$(server_key)" -binary |slopecode; } +else + # Gonzo MAC if openssl is unavailable + session_mac(){ + { server_key | dd status=none bs=256 count=1 skip=1 + { server_key | dd status=none bs=256 count=1 + [ $# -gt 0 ] && printf %s "$*" || cat + } \ + | sha256sum -; + } \ + | sha256sum | cut -d\ -f1 + } +fi + +server_key(){ + IDFILE="${IDFILE:-${_DATA:-.}/serverkey}" + if [ "$(stat -c %s "$IDFILE")" -ne 512 ] || ! cat "$IDFILE"; then + dd count=1 bs=512 if=/dev/urandom \ + | tee "$IDFILE" + fi 2>&- +} + +slopecode(){ + # 6-Bit Code that retains sort order of input data, while beeing safe to use + # in ascii transmissions, unix file names, HTTP URLs, and HTML attributes + + { [ $# -gt 0 ] && printf %s "$*" || cat; } \ + | uuencode -m - | sed ' + 1d;$d; + y;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/;0123456789:=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz; + ' +} + +randomid(){ + dd bs=12 count=1 if=/dev/urandom 2>&- \ + | slopecode +} + +timeid(){ + d=$(($_DATE % 4294967296)) + { printf "$( + printf \\%o \ + $((d / 16777216 % 256)) \ + $((d / 65536 % 256)) \ + $((d / 256 % 256)) \ + $((d % 256)) + )" + dd bs=8 count=1 if=/dev/urandom 2>&- + } | slopecode +} + +transid(){ + # transaction ID to modify a given file + local file="$1" + session_mac "$(stat -c %F%i%n%N%s%Y "$file" 2>&-)" "$SESSION_ID" +} + +checkid(){ { [ $# -gt 0 ] && printf %s "$*" || cat; } | grep -m 1 -xE '[0-9a-zA-Z:=]{16}'; } + +update_session(){ + local session sid time sig checksig + unset SESSION_KEY SESSION_ID + + read -r sid time sig <<-END + $(POST session_key || COOKIE session) + END + + checksig="$(session_mac "$sid" "$time")" + + if [ "$checksig" = "$sig" \ + -a "$time" -ge "$_DATE" \ + -a "$(checkid "$sid")" ] 2>&- + then + time=$(( $_DATE + $SESSION_TIMEOUT )) + sig="$(session_mac "$sid" "$time")" + + SESSION_KEY="${sid} ${time} ${sig}" + SESSION_ID="${sid}" + return 0 + else + return 1 + fi + +} + +new_session(){ + local sid time sig + + debug "Setting up new session" + sid="$(randomid)" + time=$(( $_DATE + $SESSION_TIMEOUT )) + sig="$(session_mac "$sid" "$time")" + + SESSION_KEY="${sid} ${time} ${sig}" + SESSION_ID="${sid}" +} + +SESSION_BIND() { + # Set tamper-proof authenticated cookie + local key="$1" value="$2" + SET_COOKIE session "$key"="${value} $(session_mac "$value" "$SESSION_ID")" Path="/${_BASE#/}" SameSite=Strict HttpOnly +} + +SESSION_VAR() { + # read authenticated cookie + # fail if value has been tampered with + local key="$1" value sig + value="$(COOKIE "$key")" + sig="${value##* }" value="${value% *}" + if [ "$sig" = "$(session_mac "$value" "$SESSION_ID")" ]; then + printf %s\\n "$value" + else + return 1 + fi +} + +SESSION_COOKIE() { + [ "$1" = new ] && new_session + SET_COOKIE 0 session="$SESSION_KEY" Path="/${_BASE#/}" SameSite=Strict HttpOnly +} + +update_session || new_session + +[ "$1" = nocookie ] || SESSION_COOKIE diff --git a/storage.sh b/storage.sh new file mode 100755 index 0000000..22e6acc --- /dev/null +++ b/storage.sh @@ -0,0 +1,191 @@ +#!/bin/sh + +# Copyright 2018, 2019, 2021 Paul Hänsch +# +# This is a file format helper, part of CGIlite. +# +# CGIlite is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# CGIlite is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with CGIlite. If not, see . + +[ -n "$include_storage" ] && return 0 +include_storage="$0" + +CR=" " +BR=' +' + +LOCK(){ + local lock="${1}.lock" timeout="${2-20}" block + + if [ \! -w "${lock%/*}" ] || [ -e "$lock" -a \! -f "$lock" ]; then + debug "Impossible to get lock: $lock" + return 1 + fi + + while [ $timeout -gt 0 ]; do + printf '%i\n' $$ >>"${lock}" + read block <"$lock" + if [ "$block" = $$ ]; then + return 0 + elif ! { ps -eo pid |grep -qwF "$block"; }; then + debug "Trying to override stale lock: $lock" + if LOCK "$lock" 1; then + rm -- "$lock" + RELEASE "$lock" + fi + else + timeout=$((timeout - 1)) + [ $timeout -gt 0 ] && sleep 1 + fi + done + + debug "Timeout while trying to get lock: $lock" + return 1 +} + +RELEASE(){ + local lock="${1}.lock" block + + read block <"$lock" + if [ "$block" = $$ ]; then + rm -- "$lock" + return 0 + else + debug "Refusing to release foreign lock: $lock" + return 1 + fi +} + +STRING(){ + local in out='' + [ $# -gt 0 ] && in="$*" || in="$(cat)" + while [ "$in" ]; do case $in in + \\*) out="${out}\\\\"; in="${in#\\}" ;; + "$BR"*) out="${out}\\n"; in="${in#${BR}}" ;; + "$CR"*) out="${out}\\r"; in="${in#${CR}}" ;; + " "*) out="${out}\\t"; in="${in# }" ;; + +*) out="${out}\\+"; in="${in#+}" ;; + " "*) out="${out}+"; in="${in# }" ;; + *) out="${out}${in%%[\\${CR}${BR} + ]*}"; in="${in#"${in%%[\\${BR}${CR} + ]*}"}" ;; + esac; done + printf '%s' "${out:-\\}" +} + +UNSTRING(){ + local in out='' + [ $# -gt 0 ] && in="$*" || in="$(cat)" + while [ "$in" ]; do case $in in + \\\\*) out="${out}\\"; in="${in#\\\\}" ;; + \\n*) out="${out}${BR}"; in="${in#\\n}" ;; + \\r*) out="${out}${CR}"; in="${in#\\r}" ;; + \\t*) out="${out} "; in="${in#\\t}" ;; + \\+*) out="${out}+"; in="${in#\\+}" ;; + +*) out="${out} "; in="${in#+}" ;; + \\*) in="${in#\\}" ;; + *) out="${out}${in%%[\\+]*}"; in="${in#"${in%%[\\+]*}"}" ;; + esac; done + printf '%s\n' "$out" +} + +DBM() { + local file="$1" cmd="$2" + local k v key value + shift 2; + + case "$cmd" in + check|contains) + key="$(STRING "$1")" + while read -r k v; do if [ "$k" = "$key" ]; then + return 0 + fi; done <"$file" 2>&- + return 1 + ;; + get) + key="$(STRING "$1")" + while read -r k v; do if [ "$k" = "$key" ]; then + UNSTRING "$v" + return 0 + fi; done <"$file" 2>&- + return 1 + ;; + set|store) + key="$(STRING "$1")" value="$(STRING "$2")" + LOCK "$file" || return 1 + { while read -r k v; do + [ "$k" = "$key" ] || printf '%s\t%s\n' "$k" "$v" + done <"$file" 2>&- + printf '%s\t%s\n' "$key" "$value" + } >"${file}.$$.tmp" + mv "${file}.$$.tmp" "${file}" + RELEASE "$file" + return 0 + ;; + add|insert) + k="$1" key="$(STRING "$1")" value="$(STRING "$2")" + LOCK "$file" || return 1 + if DBM "$file" check "$k"; then + RELEASE "$file" + return 1 + else + printf '%s\t%s\n' "$key" "$value" >>"${file}" + RELEASE "$file" + return 0 + fi + ;; + update|replace) + k="$1" key="$(STRING "$1")" value="$(STRING "$2")" + LOCK "$file" || return 1 + if ! DBM "$file" check "$k"; then + RELEASE "$file" + return 1 + fi + { while read -r k v; do + [ "$k" = "$key" ] \ + && printf '%s\t%s\n' "$key" "$value" \ + || printf '%s\t%s\n' "$k" "$v" + done <"$file" 2>&- + } >"${file}.$$.tmp" + mv "${file}.$$.tmp" "${file}" + RELEASE "$file" + return 0 + ;; + append) + key="$(STRING "$1")" value="$(STRING "$2")" + LOCK "$file" || return 1 + if ! DBM "$file" check "$1"; then + RELEASE "$file" + return 1 + fi + { while read -r k v; do + [ "$k" = "$key" ] \ + && printf '%s\t%s\n' "$key" "$v$value" \ + || printf '%s\t%s\n' "$k" "$v" + done <"$file" 2>&- + } >"${file}.$$.tmp" + mv "${file}.$$.tmp" "${file}" + RELEASE "$file" + return 0 + ;; + delete|remove) + key="$(STRING "$1")" + LOCK "$file" || return 1 + { while read -r k v; do + [ "$k" = "$key" ] || printf '%s\t%s\n' "$k" "$v" + done <"$file" 2>&- + } >"${file}.$$.tmp" + mv "${file}.$$.tmp" "${file}" + RELEASE "$file" + return 0 + ;; + esac +} diff --git a/users.sh b/users.sh new file mode 100755 index 0000000..873edf0 --- /dev/null +++ b/users.sh @@ -0,0 +1,515 @@ +#!/bin/sh + +[ -n "$include_users" ] && return 0 +include_users="$0" + +. "${_EXEC}/cgilite/session.sh" +. "${_EXEC}/cgilite/storage.sh" + +USER_REGISTRATION="${USER_REGISTRATION:-true}" +USER_REQUIREEMAIL="${USER_REQUIREEMAIL:-true}" + +HTTP_HOST="$(HEADER Host)" +MAILFROM="${MAILDOMAIN:-noreply@${HTTP_HOST%:*}}" + +# == FILE FORMAT == +# UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE +# (pending|active|deleted) + +# == GLOBALS == +UNSET_USER='unset \ + USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \ + USER_EXPIRE USER_DEVICES USER_FUTUREUSE +' + +LOCAL_USER='local \ + USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \ + USER_EXPIRE USER_DEVICES USER_FUTUREUSE +' + +unset USER_IDMAP +eval "$UNSET_USER" + +user_db="${user_db:-${_DATA}/users.db}" + +read_user() { + local user="$1" + + # Global exports + USER_ID='' USER_NAME='' USER_STATUS='' USER_EMAIL='' USER_PWSALT='' + USER_PWHASH='' USER_EXPIRE='' USER_DEVICES='' USER_FUTUREUSE='' + + if [ $# -eq 0 ]; then + read -r USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \ + USER_EXPIRE USER_DEVICES USER_FUTUREUSE + elif [ "$user" -a -f "$user_db" -a -r "$user_db" ]; then + read -r USER_ID USER_NAME USER_STATUS USER_EMAIL USER_PWSALT USER_PWHASH \ + USER_EXPIRE USER_DEVICES USER_FUTUREUSE <<-EOF + $(grep "^${user} " "${user_db}") + EOF + fi + if [ "$USER_ID" -a "${USER_EXPIRE:-0}" -gt "$_DATE" ]; then + USER_NAME="$(UNSTRING "$USER_NAME")" + USER_EMAIL="$(UNSTRING "$USER_EMAIL")" + USER_DEVICES="$(UNSTRING "$USER_DEVICES")" + unset USER_PWSALT USER_PWHASH + else + eval "$UNSET_USER" + return 1 + fi +} + +update_user() { + # internal function for user update + local uid="$1" uname status email pwsalt pwhash expire devices futureuse + local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE + local arg + + for arg in "$@"; do case $arg in + uname=*) uname="${arg#*=}";; + status=*) status="${arg#*=}";; + email=*) email="${arg#*=}";; + password=*) pwsalt="$(randomid)"; pwhash="$(user_pwhash "$pwsalt" "${arg#*=}")";; + expire=*) expire="${arg#*=}";; + devices=*) devices="${arg#*=}";; + esac; done + + if LOCK "$user_db"; then + while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES \ + FUTUREUSE; do + if [ "$UID" = "$uid" ]; then + printf '%s %s %s %s %s %s %i %s %s\n' \ + "$uid" "$(STRING "${uname-$(UNSTRING "$UNAME")}")" \ + "${status:-${status-${STATUS}}${status+\\}}" \ + "${email:-${email-${EMAIL}}${email+\\}}" \ + "${pwsalt:-${PWSALT}}" "${pwhash:-${PWHASH}}" \ + "${expire:-$((_DATE + 86400 * 730))}" \ + "$(STRING "${devices-$(UNSTRING "$DEVICES")}")" \ + "${FUTUREUSE:-\\}" + elif [ "$STATUS" = pending -a ! "$EXPIRE" -ge "$_DATE" ]; then + # omit expired invitations from output + : + else + printf '%s %s %s %s %s %s %i %s %s\n' \ + "$UID" "$UNAME" "$STATUS" "$EMAIL" "$PWSALT" "$PWHASH" \ + "$EXPIRE" "$DEVICES" "$FUTUREUSE" + fi + done <"$user_db" >"${user_db}.$$" + mv -- "${user_db}.$$" "$user_db" + RELEASE "$user_db" + else + return 1 + fi +} + +new_user(){ + local user="${1:-$(timeid)}" + shift 1 + + if LOCK "$user_db"; then + if grep -q "^${user} " "$user_db"; then + RELEASE "$user_db" + return 1 + fi + printf '%s \\ %s \\ \\ \\ %i \\ \\\n' \ + "$user" "pending" "$(( $_DATE + 86400 ))" >>"$user_db" + else + return 1 + fi + + if [ $# -eq 0 ]; then + RELEASE "$user_db" + return 0 + elif update_user "$user" "$@"; then + return 0 + else + RELEASE "$user_db" + return 1 + fi +} + +user_idmap(){ + local uid="$1" ret + eval "$LOCAL_USER" + + if [ ! "$USER_IDMAP" ]; then + while read_user; do + USER_IDMAP="${USER_IDMAP}${USER_ID} ${USER_NAME}${BR}" + done <"$user_db" + fi + if [ "$uid" -a "$USER_IDMAP" != "${USER_IDMAP##*${uid} }" ]; then + ret="${USER_IDMAP##*${uid} }"; ret="${ret%%${BR}*}"; + printf '%s\n' "$ret" + return 0 + elif [ "$uid" ]; then + return 1 + else + printf '%s' "$USER_IDMAP" + return 0 + fi +} + +user_idof(){ + local name="$(STRING "$1")" ret + [ "$USER_IDMAP" ] || user_idmap >/dev/null + + if [ "${name%\\}" -a "$USER_IDMAP" != "${USER_IDMAP% ${name}${BR}*}" ]; then + ret="${USER_IDMAP% ${name}${BR}*}"; ret="${ret##*${BR}}" + printf '%s\n' "$ret" + return 0 + else + return 1 + fi +} + +user_checkname(){ + { [ $# -gt 0 ] && printf %s "$*" || cat; } \ + | sed -nE ' + :X; $!{N;bX;} + s;[ \t\r\n]+; ;g; + s;^ ;;; s; $;;; + /@/d; + /^[a-zA-Z][a-zA-Z0-9 -~]{2,127}$/!d; + p; + ' +} + +user_checkemail(){ + { [ $# -gt 0 ] && printf %s "$*" || cat; } \ + | sed -nE ' + # W3C recommended email regex + # https://html.spec.whatwg.org/multipage/input.html#email-state-(type=email) + /^[a-zA-Z0-9.!#$%&'\''*+\/=?^_`{|}~-]+@[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/p; + ' +} + +user_nameexist(){ + local uname="$(STRING "$1")" + local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE + [ -f "$user_db" -a -r "$user_db" ] \ + && while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE; do + [ "$EXPIRE" -gt "$_DATE" -a "$UNAME" = "$uname" ] && return 0 + done <"$user_db" + return 1 +} + +user_emailexist(){ + local email="$(STRING "$1")" + local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE + [ -f "$user_db" -a -r "$user_db" ] \ + && while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE; do + [ "$EXPIRE" -gt "$_DATE" -a "$EMAIL" = "$email" ] && return 0 + done <"$user_db" + return 1 +} + +user_pwhash(){ + local salt="$1" secret="$2" hash + hash="$(printf '%s\n%s\n' "$secret" "$salt" |sha256sum)" + printf '%s\n' "${hash%% *}" +} + +user_register(){ + # reserve account, send registration mail + # preliminary uid, expiration, signature + local uid="$(timeid)" + local uname="$(POST uname |user_checkname)" + local email="$(POST email |user_checkemail)" + local pwsalt="$(randomid)" + local pw="$(POST pw |grep -m1 -xE '.{6,}' )" pwconfirm="$(POST pwconfirm)" + + if [ "$USER_REGISTRATION" != true -a -s "$user_db" ]; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_REGISTRATION_DISABLED" + fi + + if [ "$USER_REQUIREEMAIL" = true ]; then + if [ ! "email" ]; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID" + elif user_emailexist "$email"; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS" + elif new_user "$uid" status=pending email="$email" expire="$((_DATE + 86400))"; then + debug "Sending Activation Link:" \ + "https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")" + sendmail -t -f "$MAILFROM" <<-EOF + From: ${MAILFROM} + To: ${email} + Subject: Your account registration at ${HTTP_HOST%:*} + + Someone tried to sign up for a user account using this email address. + + You can activate your account using this link: + + https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid") + + This registration link will expire after 24 hours. + + If you did not request an account at ${HTTP_HOST%:*}, then someone else + probably entered your email address by accident. In this case you shoud + simply ignore this message and we will remove your email address from + our database within the next day. + + This is an automatic email. Any direct reply will not be received. + Your Account Registration Robot. + EOF + REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM" + else + REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK" + fi + + elif [ "$USER_REQUIREEMAIL" != true ]; then + if [ ! "$uname" ]; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_UNAME_INVALID" + elif user_nameexist "$uname"; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_UNAME_EXISTS" + elif [ ! "$pw" ]; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_PW_EMPTYTOOSHORT" + elif [ "$pw" != "$pwconfirm" ]; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_PW_MISMATCH" + elif new_user "$uid" uname="$uname" status=active email="$email" password="$pw" expire="$((_DATE + 86400 * 730))"; then + SESSION_COOKIE new + SESSION_BIND user_id "$uid" + + REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM" + else + REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK" + fi + fi +} + +user_invite(){ + local uid="$(timeid)" + local email="$(POST email |user_checkemail)" + local message="$(POST message)" + + if [ ! "email" ]; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_INVALID" + elif user_emailexist "$email"; then + REDIRECT "${_BASE}${PATH_INFO}#ERROR_EMAIL_EXISTS" + elif new_user "$uid" status=pending email="$email" expire="$((_DATE + 86400))"; then + debug "Sending Invitation Link:" \ + "https://${HTTP_HOST}${BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid")" + sendmail -t -f "$MAILFROM" <<-EOF + From: ${MAILFROM} + To: ${email} + Subject: You have been invited to ${HTTP_HOST%:*} + + ${USER_NAME:-Someone} has offered an invitation to this email address. + + ${message} + + You can create your account using this link: + + https://${HTTP_HOST}${_BASE}${PATH_INFO}?user_confirm=${uid}+$(session_mac "$uid") + + This registration link will expire after 24 hours. + + If you do not know what this is about, then someone else probably + entered your email address by accident. In this case you shoud + simply ignore this message and we will remove your email address from + our database within the next day. + + This is an automatic email. Any direct reply will not be received. + Your Account Registration Robot. + EOF + REDIRECT "${_BASE}${PATH_INFO}#USER_REGISTER_CONFIRM" + else + REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK" + fi +} + +user_confirm(){ + # enable account + eval "$LOCAL_USER" + local uid="$(POST uid |checkid || printf invalid)" + local signature="$(POST signature)" + local uname="$(POST uname |user_checkname)" + local pwsalt="$(randomid)" + local pw="$(POST pw |grep -m1 -xE '.{6,}' )" pwconfirm="$(POST pwconfirm)" + + read_user "${uid}" + + if [ "$signature" != "$(session_mac "$uid")" ]; then + REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_LINK_INVALID" + elif [ ! "$uname" ]; then + REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_UNAME_INVALID" + elif user_nameexist "$uname"; then + REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_UNAME_EXISTS" + elif [ ! "$pw" ]; then + REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_PW_EMPTYTOOSHORT" + elif [ "$pw" != "$pwconfirm" ]; then + REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_PW_MISMATCH" + elif [ "$USER_STATUS" != pending -o \! "$USER_EXPIRE" -gt "$_DATE" ]; then + REDIRECT "${_BASE}${PATH_INFO}?${QUERY_STRING}#ERROR_LINK_INVALID" + elif update_user "$USER_ID" uname="$uname" status=active password="$pw"; then + SESSION_COOKIE new + SESSION_BIND user_id "$USER_ID" + REDIRECT "${_BASE}${PATH_INFO}?user_register=confirm#USER_REGISTER_CONFIRM" + else + REDIRECT "${_BASE}${PATH_INFO}#ERROR_USER_NOLOCK" + fi +} + +user_login(){ + # set cookie + # keep logged in - device cookie? + # initialize new session! + local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE + local uname="$(POST uname |STRING)" pw="$(POST pw)" + + [ -f "$user_db" -a -r "$user_db" ] \ + && while read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE; do + if [ "$UNAME" = "$uname" -o "$EMAIL" = "$uname" ]; then + if [ "$STATUS" = active -a "$EXPIRE" -gt "$_DATE" -a "$PWHASH" = "$(user_pwhash "$PWSALT" "$pw")" ]; then + SESSION_COOKIE new + SESSION_BIND user_id "$UID" + REDIRECT "${_BASE}${PATH_INFO}#USER_LOGGED_IN" + fi + fi + done <"$user_db" + REDIRECT "${_BASE}${PATH_INFO}#ERROR_INVALID_LOGIN" +} + +user_logout(){ + # destroy cookie, destroy session + # keep device cookie + new_session + SESSION_COOKIE new + SET_COOKIE 0 user_id="" Path="/${_BASE#/}" SameSite=Strict HttpOnly + REDIRECT "${_BASE}${PATH_INFO}#USER_LOGGED_OUT" +} + +user_update(){ + # passphrase, email + : +} +user_recover(){ + # send recover link + : +} +user_disable(){ + : +} + +read_user "$(SESSION_VAR user_id)" +[ "$USER_STATUS" -a "$USER_STATUS" != active ] && eval $UNSET_USER + +[ "$REQUEST_METHOD" = POST ] && case "$(POST action)" in + user_register) user_register ;; + user_confirm) user_confirm ;; + user_invite) user_invite ;; + user_login) user_login ;; + user_logout) user_logout ;; + user_update) + :;; + user_recover) + :;; + user_disable) + :;; +esac + +w_user_register(){ + if [ "$(GET user_confirm)" ]; then + w_user_confirm + elif [ "$USER_REGISTRATION" != true -a -s "$user_db" ]; then + cat <<-EOF + [div #user_register .disabled + User Registration is disabled. + ] + EOF + elif [ "$USER_REQUIREEMAIL" = true ]; then + cat <<-EOF + [form #user_register .registeremail method=POST + [p We will send an activation mail to your email address. + You can continue the signup process when you click on the + activation link in this email.] + [input type=email name=email placeholder="Email"] + [submit "action" "user_register" Sign Up] + ] + EOF + elif [ "$USER_REQUIREEMAIL" != true ]; then + cat <<-EOF + [form #user_register .registername method=POST + [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[a-zA-Z\]\[a-zA-Z0-9 -~\]{2,127}$" autocomplete=off] + [input type=password name=pw placeholder="Choose Passphrase" pattern=".{6,}"] + [input type=password name=pwconfirm placeholder="Confirm Passphrase" pattern=".{6,}"] + [submit "action" "user_register" Sign Up] + ] + EOF + fi +} + +w_user_confirm(){ + local UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE + local user_confirm="$(GET user_confirm)" + local uid="${user_confirm% *}" signature="${user_confirm#* }" + + if [ "$signature" = "$(session_mac "$uid")" ]; then + read -r UID UNAME STATUS EMAIL PWSALT PWHASH EXPIRE DEVICES FUTUREUSE <<-EOF + $(grep "^${uid} " "$user_db") + EOF + if [ "$STATUS" = pending -a "$EXPIRE" -gt "$_DATE" ]; then + cat <<-EOF + [form #user_confirm method=POST + [input type=hidden name=uid value="${uid}"] + [input type=hidden name=signature value="${signature}"] + [input disabled=disabled value="$(HTML "$EMAIL")"] + [input name=uname placeholder="Choose Username" tooltip="Your username may contain any character but the @ sign. It must be at least 3 characters long, and it must start with a letter." pattern="^\[a-zA-Z\]\[a-zA-Z0-9 -~\]{2,127}$" autocomplete=off] + [input type=password name=pw placeholder="Choose Passphrase" pattern=".{6,}"] + [input type=password name=pwconfirm placeholder="Confirm Passphrase" pattern=".{6,}"] + [submit "action" "user_confirm" Finish Registration] + ] + EOF + else + cat <<-EOF + [div #user_confirm .expired + [p This activation link is not valid anymore.] + ] + EOF + fi + else + cat <<-EOF + [div #user_confirm .invalid + [p This activation link is invalid. Make sure you copied the whole activation link from your email and be careful not to include any line breaks.] + ] + EOF + fi +} + +w_user_invite(){ + if [ "$(GET user_confirm)" ]; then + w_user_confirm + elif [ "$USER_ID" ]; then + cat <<-EOF + [form #user_invite method=POST + [input placeholder="Email Recipient" name=email autocomplete=off] + [textarea name="message" placeholder="Message to recipient" . ] + [submit "action" "user_invite" Send Invitation] + ] + EOF + else + cat <<-EOF + [div #user_invite .notallowed + Only registered users may send an invitation to another user. + ] + EOF + fi +} + +w_user_login(){ + if [ ! "$USER_ID" ]; then + cat <<-EOF + [form #user_login .login method=POST + [input name=uname placeholder="Username or Email" autocomplete=off] + [input type=password name=pw placeholder="Passphrase"] + [submit "action" "user_login" Login] + ] + EOF + elif [ "$USER_ID" ]; then + cat <<-EOF + [form #user_login .logout method=POST + [p Logged in as [span . $(HTML ${USER_NAME})]] + [submit "action" "user_logout" Logout] + ] + EOF + fi +}