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Add SFTP user setup script for SSL certificate management
This script automates the setup of an SFTP user for managing SSL certificates, including creating necessary directories, setting permissions, and configuring SSH.
This commit is contained in:
Mr.Lin
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#!/bin/bash
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set -e
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# 自用创建上传证书
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CERT_USER="3x-ui-cert"
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CERT_DIR="/mnt/docker/docker-compose/dpanel/dpanel/compose/3x-ui/data/cert"
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SFTP_ROOT="/srv/sftp/${CERT_USER}"
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SFTP_DIR="${SFTP_ROOT}/cert"
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echo "========== 3x-ui 证书 SFTP 用户一条龙配置 =========="
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if [ "$(id -u)" != "0" ]; then
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echo "错误：请使用 root 用户执行"
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exit 1
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fi
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echo
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echo "1. 安装依赖..."
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apt update
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apt install -y openssh-server acl
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echo
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echo "2. 创建/检查 3x-ui 证书目录..."
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mkdir -p "$CERT_DIR"
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echo
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echo "3. 创建/检查 SFTP 用户：$CERT_USER"
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if id "$CERT_USER" >/dev/null 2>&1; then
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echo "用户已存在：$CERT_USER"
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else
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useradd --badname -m -s /usr/sbin/nologin "$CERT_USER"
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echo "请设置 $CERT_USER 的密码："
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passwd "$CERT_USER"
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fi
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CERT_UID="$(id -u "$CERT_USER")"
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CERT_GID="$(id -g "$CERT_USER")"
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echo "当前用户 UID：$CERT_UID"
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echo "当前用户 GID：$CERT_GID"
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echo
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echo "4. 创建 SFTP 隔离目录..."
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mkdir -p "$SFTP_DIR"
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# Chroot 根目录必须 root 拥有，且不能给普通用户写权限
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chown root:root /srv
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chmod 755 /srv
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mkdir -p /srv/sftp
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chown root:root /srv/sftp
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chmod 755 /srv/sftp
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chown root:root "$SFTP_ROOT"
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chmod 755 "$SFTP_ROOT"
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echo
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echo "5. 重新 bind 挂载证书目录..."
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if mountpoint -q "$SFTP_DIR"; then
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umount "$SFTP_DIR" 2>/dev/null || umount -l "$SFTP_DIR"
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fi
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mount --bind "$CERT_DIR" "$SFTP_DIR"
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echo
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echo "6. 修复 /etc/fstab 自动挂载..."
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cp /etc/fstab "/etc/fstab.bak.$(date +%F-%H%M%S)"
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TMP_FSTAB="$(mktemp)"
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awk -v sftp="$SFTP_DIR" '$2 != sftp {print}' /etc/fstab > "$TMP_FSTAB"
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cat "$TMP_FSTAB" > /etc/fstab
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rm -f "$TMP_FSTAB"
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echo "$CERT_DIR $SFTP_DIR none bind 0 0" >> /etc/fstab
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systemctl daemon-reload 2>/dev/null || true
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echo
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echo "7. 给真实路径上级目录添加穿透权限..."
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P="$(dirname "$CERT_DIR")"
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while [ "$P" != "/" ]; do
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setfacl -m u:${CERT_USER}:--x "$P" 2>/dev/null || true
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setfacl -m m::rwx "$P" 2>/dev/null || true
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P="$(dirname "$P")"
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done
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echo
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echo "8. 修复 cert 目录本身权限..."
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chgrp -R "$CERT_GID" "$CERT_DIR"
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chmod -R g+rwX "$CERT_DIR"
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find "$CERT_DIR" -type d -exec chmod g+s {} \;
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# 给 SFTP 用户完整读写权限
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setfacl -R -m u:${CERT_USER}:rwX "$CERT_DIR"
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setfacl -R -m u:${CERT_UID}:rwX "$CERT_DIR"
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setfacl -R -m m::rwx "$CERT_DIR"
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# 默认继承权限：以后新建文件夹/文件也能写
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find "$CERT_DIR" -type d -exec setfacl -m d:u:${CERT_USER}:rwx {} \;
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find "$CERT_DIR" -type d -exec setfacl -m d:u:${CERT_UID}:rwx {} \;
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find "$CERT_DIR" -type d -exec setfacl -m d:m::rwx {} \;
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echo
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echo "9. 可选给 UID 1000 读取权限，避免覆盖当前用户..."
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if [ "$CERT_UID" != "1000" ]; then
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setfacl -R -m u:1000:rX "$CERT_DIR" 2>/dev/null || true
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find "$CERT_DIR" -type d -exec setfacl -m d:u:1000:rX {} \; 2>/dev/null || true
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else
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echo "当前 $CERT_USER 就是 UID 1000，跳过 u:1000:rX，避免覆盖写权限"
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fi
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# 最终再覆盖一次，确保 3x-ui-cert 一定是 rwx
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setfacl -R -m u:${CERT_USER}:rwX "$CERT_DIR"
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setfacl -R -m m::rwx "$CERT_DIR"
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find "$CERT_DIR" -type d -exec setfacl -m d:u:${CERT_USER}:rwx {} \;
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find "$CERT_DIR" -type d -exec setfacl -m d:m::rwx {} \;
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echo
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echo "10. 写入 SSH SFTP 限制配置..."
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rm -f /etc/ssh/sshd_config.d/3x-ui-cert-sftp.conf
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sed -i '/# BEGIN 3X_UI_CERT_SFTP/,/# END 3X_UI_CERT_SFTP/d' /etc/ssh/sshd_config
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cat >>/etc/ssh/sshd_config <<'SSHEOF'
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# BEGIN 3X_UI_CERT_SFTP
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Match User 3x-ui-cert
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ChrootDirectory /srv/sftp/3x-ui-cert
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ForceCommand internal-sftp -d /cert
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PasswordAuthentication yes
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PubkeyAuthentication no
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PermitTTY no
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AllowTcpForwarding no
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X11Forwarding no
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AllowAgentForwarding no
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# END 3X_UI_CERT_SFTP
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SSHEOF
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echo
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echo "11. 检查并重启 SSH..."
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sshd -t
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systemctl restart ssh 2>/dev/null || systemctl restart sshd 2>/dev/null || service ssh restart
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echo
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echo "12. 测试 SFTP 实际路径写入..."
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runuser -u "$CERT_USER" -- touch "$SFTP_DIR/.sftp_write_test"
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rm -f "$SFTP_DIR/.sftp_write_test"
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echo
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echo "13. 测试新建域名目录和证书文件..."
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TEST_DIR="$SFTP_DIR/.test-domain"
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runuser -u "$CERT_USER" -- mkdir -p "$TEST_DIR"
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runuser -u "$CERT_USER" -- touch "$TEST_DIR/fullchain.pem"
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runuser -u "$CERT_USER" -- touch "$TEST_DIR/privkey.pem"
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rm -rf "$TEST_DIR"
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echo
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echo "========== 配置完成 =========="
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echo
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echo "SFTP 用户：$CERT_USER"
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echo "SFTP 端口：22"
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echo "SFTP 上传目录：/cert"
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echo "真实目录：$CERT_DIR"
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echo
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echo "第三方连接命令："
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echo "sftp -o PubkeyAuthentication=no -o PreferredAuthentications=password ${CERT_USER}@服务器IP"
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echo
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echo "当前 ACL："
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getfacl "$CERT_DIR"
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echo
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echo "重点确认应该看到："
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echo "user:${CERT_USER}:rwx"
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echo "default:user:${CERT_USER}:rwx"
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