介绍一种给博客文章加密的方法。
很多时候当我们写了一篇博客，但并不想所有人能够访问它。对于WordPress这很容易做到，但是对于hexo，由于是静态网页，并不能做到完全的加密。
在GitHub上发现了有个人做了一个加密的插件，还挺好用，推荐给大家。
安装
在你的hexo根目录的package.json文件夹中添加：1
“hexo-blog-encrypt”: “2.0.*”
然后在命令行中输入：1
npm install
这样这个插件就安装好了。
找到根目录下的_config.yml文件，添加如下：1
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4# Security
##
encrypt:
enable: true
这样就可以使用插件了。
使用
在你要加密的文章头部写入password，例如：1
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7---
title: Hello World
date: 2016-03-30 21:18:02
password: abc123
abstract: Welcome to my blog, enter password to read.
message: Welcome to my blog, enter password to read.
---
这样就可以需要输入密码访问了。
Bugs
- 对于hexo-blog-encrypt2.0之前的版本，无法触发渲染mathjax的函数，需要进行升级。
- 如果想对TOC进行加密，以next主题为例，将
next/layout/_macro/sidebar.swig的文件替换为：1
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197{% macro render(is_post) %}
<div class="sidebar-toggle">
<div class="sidebar-toggle-line-wrap">
<span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
<span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
</div>
</div>
<aside id="sidebar" class="sidebar">
<div class="sidebar-inner">
{% set display_toc = is_post and theme.toc.enable %}
{% if page.encrypt == true %}
{% if display_toc and toc(page.origin).length > 1 %}
<ul class="sidebar-nav motion-element">
<li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap" >
{{ __('sidebar.toc') }}
</li>
<li class="sidebar-nav-overview" data-target="site-overview">
{{ __('sidebar.overview') }}
</li>
</ul>
{% endif %}
{% else %}
{% if display_toc and toc(page.content).length > 1 %}
<ul class="sidebar-nav motion-element">
<li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap" >
{{ __('sidebar.toc') }}
</li>
<li class="sidebar-nav-overview" data-target="site-overview">
{{ __('sidebar.overview') }}
</li>
</ul>
{% endif %}
{% endif %}
<section class="site-overview sidebar-panel{% if not display_toc or toc(page.content).length <= 1 %} sidebar-panel-active{% endif %}">
<div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
<img class="site-author-image" itemprop="image"
src="{{ url_for( theme.avatar | default(theme.images + '/avatar.gif') ) }}"
alt="{{ theme.author }}" />
<p class="site-author-name" itemprop="name">{{ theme.author }}</p>
{% if theme.seo %}
<p class="site-description motion-element" itemprop="description">{{ theme.signature }}</p>
{% else %}
<p class="site-description motion-element" itemprop="description">{{ theme.description }}</p>
{% endif %}
</div>
<nav class="site-state motion-element">
{% if config.archive_dir != '/' %}
<div class="site-state-item site-state-posts">
<a href="{{ url_for(theme.menu.archives) }}">
<span class="site-state-item-count">{{ site.posts.length }}</span>
<span class="site-state-item-name">{{ __('state.posts') }}</span>
</a>
</div>
{% endif %}
{% if site.categories.length > 0 %}
{% set categoriesPageQuery = site.pages.find({type: 'categories'}, {lean: true}) %}
{% set hasCategoriesPage = categoriesPageQuery.length > 0 %}
<div class="site-state-item site-state-categories">
{% if hasCategoriesPage %}<a href="{{ url_for(categoriesPageQuery[0].path) }}">{% endif %}
<span class="site-state-item-count">{{ site.categories.length }}</span>
<span class="site-state-item-name">{{ __('state.categories') }}</span>
{% if hasCategoriesPage %}</a>{% endif %}
</div>
{% endif %}
{% if site.tags.length > 0 %}
{% set tagsPageQuery = site.pages.find({type: 'tags'}, {lean: true}) %}
{% set hasTagsPage = tagsPageQuery.length > 0 %}
<div class="site-state-item site-state-tags">
{% if hasTagsPage %}<a href="{{ url_for(tagsPageQuery[0].path) }}">{% endif %}
<span class="site-state-item-count">{{ site.tags.length }}</span>
<span class="site-state-item-name">{{ __('state.tags') }}</span>
{% if hasTagsPage %}</a>{% endif %}
</div>
{% endif %}
</nav>
{% if theme.rss %}
<div class="feed-link motion-element">
<a href="{{ url_for(theme.rss) }}" rel="alternate">
<i class="fa fa-rss"></i>
RSS
</a>
</div>
{% endif %}
<div class="links-of-author motion-element">
{% if theme.social %}
{% for name, link in theme.social %}
<span class="links-of-author-item">
<a href="{{ link }}" target="_blank" title="{{ name }}">
{% if theme.social_icons.enable %}
<i class="fa fa-fw fa-{{ theme.social_icons[name] | default('globe') | lower }}"></i>
{% endif %}
{{ name }}
</a>
</span>
{% endfor %}
{% endif %}
</div>
{% set cc = {'by': 1, 'by-nc': 1, 'by-nc-nd': 1, 'by-nc-sa': 1, 'by-nd': 1, 'by-sa': 1, 'zero': 1} %}
{% if theme.creative_commons in cc %}
<div class="cc-license motion-element" itemprop="license">
<a href="https://creativecommons.org/{% if theme.creative_commons === 'zero' %}publicdomain/zero/1.0{% else %}licenses/{{ theme.creative_commons }}/4.0{% endif %}/" class="cc-opacity" target="_blank">
<img src="{{ url_for(theme.images) }}/cc-{{ theme.creative_commons }}.svg" alt="Creative Commons" />
</a>
</div>
{% endif %}
{# Blogroll #}
{% if theme.links %}
<div class="links-of-blogroll motion-element {{ "links-of-blogroll-" + theme.links_layout | default('inline') }}">
<div class="links-of-blogroll-title">
<i class="fa fa-fw fa-{{ theme.links_icon | default('globe') | lower }}"></i>
{{ theme.links_title }}
</div>
<ul class="links-of-blogroll-list">
{% for name, link in theme.links %}
<li class="links-of-blogroll-item">
<a href="{{ link }}" title="{{ name }}" target="_blank">{{ name }}</a>
</li>
{% endfor %}
</ul>
</div>
{% endif %}
{% include '../_custom/sidebar.swig' %}
</section>
{% if page.encrypt == true %}
{% if display_toc and toc(page.origin).length > 1 %}
<!--noindex-->
<section class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
<div class="post-toc">
{% if page.toc_number === undefined %}
{% set toc = toc(page.origin, { "class": "nav", list_number: theme.toc.number }) %}
{% else %}
{% set toc = toc(page.origin, { "class": "nav", list_number: page.toc_number }) %}
{% endif %}
{% if toc.length <= 1 %}
<p class="post-toc-empty">{{ __('post.toc_empty') }}</p>
{% else %}
<div class="post-toc-content">{{ toc }}</div>
{% endif %}
</div>
</section>
<!--/noindex-->
{% endif %}
{% else %}
{% if display_toc and toc(page.content).length > 1 %}
<!--noindex-->
<section class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
<div class="post-toc">
{% if page.toc_number === undefined %}
{% set toc = toc(page.content, { "class": "nav", list_number: theme.toc.number }) %}
{% else %}
{% set toc = toc(page.content, { "class": "nav", list_number: page.toc_number }) %}
{% endif %}
{% if toc.length <= 1 %}
<p class="post-toc-empty">{{ __('post.toc_empty') }}</p>
{% else %}
<div class="post-toc-content">{{ toc }}</div>
{% endif %}
</div>
</section>
<!--/noindex-->
{% endif %}
{% endif %}
{% if theme.sidebar.b2t %}
<div class="back-to-top">
<i class="fa fa-arrow-up"></i>
{% if theme.sidebar.scrollpercent %}
<span id="scrollpercent"><span>0</span>%</span>
{% endif %}
</div>
{% endif %}
</div>
</aside>
{% endmacro %}