electron: [Bug]: safeStorage.decryptString - Error while decrypting the ciphertext

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a bug report that matches the one I want to file, without success.

Electron Version

16.0.7

What operating system are you using?

macOS

Operating System Version

macOS Monterey 12.1

What arch are you using?

x64

Last Known Working Electron version

No response

Expected Behavior

safeStorage.decryptString(buffer) should decrypt a previously encrypted string (using safeStorage.encryptString(plainText))

Given the following module for storing settings for an application.

Settings are stored to a file and retrieved on next app start.

Sensitive information, e.g. personalAccessToken should only be stored encrypted.

const { join } = require('path')
const { existsSync, promises: { readFile, writeFile } } = require('fs')
const { app, safeStorage } = require('electron')
const { Buffer } = require('buffer')

const userData = app.getPath('userData')
const settingsPath = join(userData, 'settings.json')

const defaultSettings = {
  baseUrl: '',
  personalAccessToken: '',
  fetchInterval: 5
}

const encrypt = plainText => {
  const buffer = safeStorage.encryptString(plainText)
  const encrypted = buffer.toString('base64')
  return encrypted
}

const decrypt = encrypted => {
  const buffer = Buffer.from(encrypted, 'base64')
  const plainText = safeStorage.decryptString(buffer)
  return plainText
}

module.exports = {
  async save ({ baseUrl, personalAccessToken, fetchInterval }) {
    const json = JSON.stringify({
      baseUrl,
      personalAccessToken: encrypt(personalAccessToken),
      fetchInterval
    })
    await writeFile(settingsPath, json, 'utf8')
  },

  async load () {
    if (!existsSync(settingsPath)) { 
      return defaultSettings
    }
    const json = await readFile(settingsPath, 'utf8')
    const { baseUrl, personalAccessToken, fetchInterval } = JSON.parse(json)
    return {
      ...defaultSettings,
      baseUrl,
      personalAccessToken: decrypt(personalAccessToken),
      fetchInterval
    }
  }
}

Actual Behavior

safeStorage.encryptString(plainText) works as expected but whenever a safeStorage.decryptString(buffer) is called it throws an error:

Error while decrypting the ciphertext provided to safeStorage.decryptString.

Testcase Gist URL

No response

Additional Information

No response