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gatsby-remark-encrypt

v1.1.0

Published

Gatsby plugin to encrypt markdown posts

Downloads

3

Readme

gatsby-remark-encrypt

Encrypt your markdown posts in Gatsby website.

Install

npm install --save gatsby-remark-encrypt crypto-js

How to use

Add plugin at the LAST of plugins array in gatsby-transform-remark.

Because the plugin needs to encrypt the whole html after other plugins' process finish.

// In your gatsby-config.js
plugins: [
  {
    resolve: `gatsby-transformer-remark`,
    options: {
      plugins: [
        ...otherPlugins,
+       `gatsby-remark-encrypt`
      ],
    },
  },
]

Add password field in frontmatter of the post you want to encrypt.

  ---
  title: My encrypted post
  date: 2020-12-05 21:00:00
+ password: 123456
  ---

In your page query, add the encrypted field to tell whether the post is encrypted.

NOTE: Do not query password in frontmatter, or the raw password may leaked in page-data.json.

// In your src/templates/post.js
export const pageQuery = graphql`
  query($id: String!) {
    markdownRemark(id: { eq: $id }) {
      id
      html
      frontmatter {
        title
        date(formatString: "yyyy/MM/DD")
      }
      fields {
        slug
+       encrypted
      }
    }
  }
`

Then you will find your html is encrypted, you can decrypt it use CryptoJS.

import CryptoJS from 'crypto-js'

if (post.fields.encrypted) {
  const realHtml = CryptoJS.AES.decrypt(post.html, '123456').toString(CryptoJS.enc.Utf8)
}

Code example

Prompt user to input password.

// this html is encrypted
const Encrypted = ({ html }) => {
  // the decrypted content
  const [decrypted, setDecrypted] = useState('')
  // save user input
  const [password, setPassword] = useState('')
  
  return decrypted ? (
    <section
      dangerouslySetInnerHTML={{ __html: decrypted }}
      itemProp="articleBody"
    />
  ) : (
    <section itemProp="articleBody">
      <input
        type='password'
        value={password}
        onChange={e => setPassword(e.target.value)}
        onKeyUp={e => {
          if (e.keyCode === 13) {
            try {
              setDecrypted(CryptoJS.AES.decrypt(html, password).toString(CryptoJS.enc.Utf8))
            } catch (e) {
              alert('password error')
            }
          }
        }}
      />
    </section>
  )
}

// in your template, decide to show encrypted view or normal view according to `frontmatter.password`
export default ({ data }) => (
  ...
  {post.fields.encrypted ? (
    <Encrypted html={post.html} />
  ) : (
    <section
      dangerouslySetInnerHTML={{ __html: post.html }}
      itemProp="articleBody"
    />
  )}
  ...
)