312 lines
10 KiB
Bash
312 lines
10 KiB
Bash
#!/bin/bash
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# ==============================================================================
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# Script: create_pma_gateway.sh
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# Purpose: Create a time-limited gateway URL for phpMyAdmin on Virtuozzo LLSMP.
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# Usage: create_pma_gateway.sh --validity=30 [--slug=myalias]
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# Outputs: Prints the generated URL.
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# ==============================================================================
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set -euo pipefail
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SLUG=""
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VALIDITY=30 # minutes
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for arg in "$@"; do
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case $arg in
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--slug=*) SLUG="${arg#*=}" ;;
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--validity=*) VALIDITY="${arg#*=}" ;;
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*) echo "Unknown argument $arg"; exit 1 ;;
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esac
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done
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if [[ -z "$SLUG" ]]; then
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SLUG=$(openssl rand -hex 4) # 8-char random
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fi
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# Determine environment public host (no node prefix)
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if [[ -n "${JELASTIC_ENV_DOMAIN:-}" ]]; then
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ENV_HOST="$JELASTIC_ENV_DOMAIN"
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else
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ENV_HOST=$(hostname -f)
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ENV_HOST=${ENV_HOST#node*-} # strip nodeXXXX-
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fi
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# ==============================================================================
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# Step 1: Ensure xmlstarlet is installed for safe XML parsing
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# ==============================================================================
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if ! command -v xmlstarlet &> /dev/null; then
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echo "xmlstarlet not found. Installing for safe XML parsing..." >&2
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if ! sudo dnf install -y xmlstarlet; then
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echo "FATAL: Failed to install xmlstarlet. Cannot safely read LiteSpeed config." >&2
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exit 1
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fi
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fi
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# ==============================================================================
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# Step 2: Dynamically read SSL configuration from main LiteSpeed config
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# ==============================================================================
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LITESPEED_CONFIG="/var/www/conf/httpd_config.xml"
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KEY_FILE_PATH=""
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CERT_FILE_PATH=""
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if [[ -f "$LITESPEED_CONFIG" ]]; then
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echo "Reading SSL configuration from LiteSpeed main config..." >&2
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# Query the main HTTPS listener (port 443) for keyFile and certFile
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# This is the most specific and robust XPath
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KEY_FILE_PATH=$(sudo xmlstarlet sel -t -v \
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"//httpServerConfig/listenerList/listener[name='HTTPS' and secure='1' and address='*:443'][1]/keyFile" \
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"$LITESPEED_CONFIG" 2>/dev/null | xargs)
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CERT_FILE_PATH=$(sudo xmlstarlet sel -t -v \
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"//httpServerConfig/listenerList/listener[name='HTTPS' and secure='1' and address='*:443'][1]/certFile" \
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"$LITESPEED_CONFIG" 2>/dev/null | xargs)
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fi
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# ==============================================================================
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# Step 3: Implement fallback to default self-signed certificate
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# ==============================================================================
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if [[ -z "$KEY_FILE_PATH" ]] || [[ -z "$CERT_FILE_PATH" ]]; then
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echo "No custom SSL certificate found. Falling back to default self-signed certificate." >&2
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# Use SINGLE quotes to write the literal string "$SERVER_ROOT" to the config,
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# not the shell variable. This is critical.
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KEY_FILE_PATH='$SERVER_ROOT/ssl/litespeed.key'
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CERT_FILE_PATH='$SERVER_ROOT/ssl/litespeed.crt'
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else
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echo "Using SSL certificate: $CERT_FILE_PATH" >&2
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fi
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PMADB_DIR="/usr/share/phpMyAdmin"
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GATEWAY_FILE="$PMADB_DIR/access-db-$SLUG.php"
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SECRET_FILE="/var/lib/jelastic/keys/mbadmin_secret"
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sudo mkdir -p "$(dirname $SECRET_FILE)"
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if [[ ! -f "$SECRET_FILE" ]]; then
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sudo sh -c "openssl rand -hex 32 > $SECRET_FILE"
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fi
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sudo chown litespeed:litespeed "$SECRET_FILE"
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sudo chmod 644 "$SECRET_FILE"
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SECRET=$(sudo cat "$SECRET_FILE" | xargs)
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now=$(date +%s)
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expires=$((now + VALIDITY*60))
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# token = base64("$SLUG:$expires") . '.' . HMAC_SHA256(secret, data)
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data="$SLUG:$expires"
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base=$(printf "%s" "$data" | base64 | tr -d '\n')
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mac=$(php -r "echo hash_hmac('sha256', '$data', '$SECRET');")
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token="$base.$mac"
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# Secure the phpMyAdmin vhost with Rewrite Rules to block direct access
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VHOST_CONFIG="/usr/share/phpMyAdmin/vhost.conf"
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NEEDS_RESTART=0
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# If vhost config is missing or empty, recreate it from a known-good default.
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if [ ! -s "$VHOST_CONFIG" ]; then
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echo "Warning: $VHOST_CONFIG is empty or missing. Recreating from default." >&2
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sudo tee "$VHOST_CONFIG" > /dev/null <<'EOF'
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<?xml version="1.0" encoding="UTF-8"?>
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<virtualHostConfig>
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<docRoot>/usr/share/phpMyAdmin/</docRoot>
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<enableGzip>1</enableGzip>
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<logging>
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<log>
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<useServer>0</useServer>
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<fileName>$SERVER_ROOT/logs/error.log</fileName>
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<logLevel>DEBUG</logLevel>
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<rollingSize>10M</rollingSize>
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</log>
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<accessLog>
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<useServer>0</useServer>
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<fileName>$SERVER_ROOT/logs/access.log</fileName>
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<rollingSize>10M</rollingSize>
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<keepDays>30</keepDays>
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<compressArchive>0</compressArchive>
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</accessLog>
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</logging>
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<index>
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<useServer>0</useServer>
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<indexFiles>index.php, index.html</indexFiles>
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<autoIndex>0</autoIndex>
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<autoIndexURI>/_autoindex/default.php</autoIndexURI>
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</index>
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<customErrorPages>
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<errorPage>
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<errCode>404</errCode>
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<url>/error404.html</url>
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</errorPage>
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</customErrorPages>
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<htAccess>
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<allowOverride>31</allowOverride>
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<accessFileName>.htaccess</accessFileName>
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</htAccess>
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<expires>
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<enableExpires>1</enableExpires>
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</expires>
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<security>
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<wpProtectAction>0</wpProtectAction>
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<hotlinkCtrl>
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<enableHotlinkCtrl>0</enableHotlinkCtrl>
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<suffixes>gif, jpeg, jpg</suffixes>
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<allowDirectAccess>1</allowDirectAccess>
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<onlySelf>1</onlySelf>
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</hotlinkCtrl>
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<accessControl>
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<allow>*</allow>
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</accessControl>
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<wpProtectLimit>10</wpProtectLimit></security>
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<cache>
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<storage>
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<cacheStorePath>/tmp/lscache/vhosts/$VH_NAME</cacheStorePath>
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</storage>
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</cache>
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<rewrite>
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<enable>0</enable>
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<logLevel>0</logLevel>
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<rules>RewriteCond %{HTTP_USER_AGENT} ^NameOfBadRobot
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RewriteRule ^/nospider/ - [F]</rules>
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</rewrite>
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<vhssl>
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<keyFile>__KEY_FILE_PLACEHOLDER__</keyFile>
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<certFile>__CERT_FILE_PLACEHOLDER__</certFile>
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<certChain>1</certChain>
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</vhssl>
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<frontPage>
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<enable>0</enable>
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<disableAdmin>0</disableAdmin>
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</frontPage>
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<awstats>
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<updateMode>0</updateMode>
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<workingDir>$VH_ROOT/awstats</workingDir>
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<awstatsURI>/awstats/</awstatsURI>
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<siteDomain>localhost</siteDomain>
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<siteAliases>127.0.0.1 localhost</siteAliases>
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<updateInterval>86400</updateInterval>
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<updateOffset>0</updateOffset>
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</awstats>
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</virtualHostConfig>
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EOF
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# ==============================================================================
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# Step 5: Inject the discovered certificate paths using sed
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# ==============================================================================
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# Escape special characters (/, $, &, \, ') in paths for use with sed
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ESCAPED_KEY_PATH=$(printf '%s\n' "$KEY_FILE_PATH" | sed 's/[\/&$\\'"'"']/\\&/g')
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ESCAPED_CERT_PATH=$(printf '%s\n' "$CERT_FILE_PATH" | sed 's/[\/&$\\'"'"']/\\&/g')
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# Replace placeholders with actual certificate paths
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sudo sed -i "s|__KEY_FILE_PLACEHOLDER__|$ESCAPED_KEY_PATH|g" "$VHOST_CONFIG"
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sudo sed -i "s|__CERT_FILE_PLACEHOLDER__|$ESCAPED_CERT_PATH|g" "$VHOST_CONFIG"
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echo "SSL certificate paths injected into vhost configuration." >&2
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NEEDS_RESTART=1
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fi
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if [ -f "$VHOST_CONFIG" ]; then
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MARKER="# PMA Gateway Security Rules"
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# If rules are not already in place, add them.
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if ! sudo grep -qF "$MARKER" "$VHOST_CONFIG"; then
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# Ensure xmlstarlet is installed, as it's the safest way to edit XML.
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if ! command -v xmlstarlet &> /dev/null; then
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echo "xmlstarlet not found. Installing for safe XML editing..." >&2
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if ! sudo dnf install -y xmlstarlet; then
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echo "FATAL: Failed to install xmlstarlet. Cannot safely modify vhost." >&2
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exit 1
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fi
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fi
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# Define the new rules content. Note the lack of indentation.
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# xmlstarlet will handle the formatting.
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NEW_RULES_CONTENT=$(cat <<'EOF'
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# PMA Gateway Security Rules
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# Allow access to the gateway scripts themselves
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RewriteCond %{REQUEST_URI} ^/access-db-.*\.php$
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RewriteRule .* - [L]
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# For all other requests, block if the security cookie is not present
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RewriteCond %{HTTP_COOKIE} !pma_access_granted
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RewriteRule .* - [F,L]
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EOF
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)
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# Use xmlstarlet to atomically update the rewrite block in-place.
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# This is far safer than sed/awk for structured XML.
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if ! sudo xmlstarlet ed -L \
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-u "//virtualHostConfig/rewrite/enable" -v "1" \
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-u "//virtualHostConfig/rewrite/rules" -v "$NEW_RULES_CONTENT" \
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"$VHOST_CONFIG"; then
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echo "FATAL: xmlstarlet failed to update $VHOST_CONFIG." >&2
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exit 1
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fi
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NEEDS_RESTART=1
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fi
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else
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echo "Warning: phpMyAdmin vhost config not found at $VHOST_CONFIG. Cannot apply security rules." >&2
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fi
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sudo tee "$GATEWAY_FILE" >/dev/null <<'PHP'
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<?php
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// Secure phpMyAdmin gateway – auto-generated, do NOT edit manually.
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ini_set('session.cookie_httponly', 1);
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$param = 'token';
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function deny() {
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http_response_code(403);
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echo 'Access denied';
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exit;
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}
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if (!isset($_GET[$param])) {
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deny();
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}
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$token = $_GET[$param];
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if (strpos($token, '.') === false) {
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deny();
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}
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list($base, $sig) = explode('.', $token, 2);
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$data = base64_decode($base, true);
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if ($data === false) {
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deny();
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}
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if (strpos($data, ':') === false) {
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deny();
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}
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list($slug, $exp) = explode(':', $data, 2);
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if (time() > intval($exp)) {
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unlink(__FILE__); // Self-destruct if expired
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deny();
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}
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$secret = trim(file_get_contents('/var/lib/jelastic/keys/mbadmin_secret'));
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if (!hash_equals($sig, hash_hmac('sha256', $data, $secret))) {
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deny();
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}
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// Issue a short-lived cookie that the rewrite rule looks for.
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// This cookie acts as the temporary pass.
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setcookie('pma_access_granted', $sig, intval($exp), '/', '', true, true);
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header('Location: /');
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exit;
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?>
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PHP
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sudo chown litespeed:litespeed "$GATEWAY_FILE"
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sudo chmod 644 "$GATEWAY_FILE"
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# Restart LiteSpeed if we modified the config
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if [[ "${NEEDS_RESTART:-0}" -eq 1 ]]; then
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echo "Applying security rules and restarting LiteSpeed..." >&2
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if ! sudo systemctl restart lsws; then
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echo "Warning: LiteSpeed restart failed. Manual restart may be required." >&2
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fi
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fi
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URL="https://$ENV_HOST:8443/access-db-$SLUG.php?token=$token"
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echo "$URL"
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