title: Travis-ci decryption of encrypted files
body: <p>I encrypted my .env file, and I now have a <code>.env.enc</code> file. How does my team decrypt this?
  I got this response when I encrypted the file, and it is stored in my .travis.yml file</p>
  
  <pre><code>openssl aes-256-cbc -K $encrypted_cf94abc85bdc_key -iv $encrypted_cf94abc85bdc_iv -in .env.enc -out .env -d
  </code></pre>
  
  <p>I tried that on the terminal and this I just get:</p>
  
  <pre><code>iv undefined
  </code></pre>
  
  <p>I tried decrypting with the travis-cli:</p>
  
  <pre><code>travis encrypt-file .env.enc .env -d 
  </code></pre>
  
  <p>I just get this:</p>
  
  <pre><code>key must be 64 characters long and a valid hex number
  </code></pre>
  
  <p>I tried it with the key and iv</p>
  
  <pre><code>travis encrypt-file .env.enc .env -d -K $encrypted_cf94abc85bdc_key -iv $encrypted_cf94abc85bdc_iv
  </code></pre>
  
  <p>I checked if the travis env variables exist, and they do:</p>
  
  <pre><code>encrypted_cf94abc85bdc_key=[secure]
  encrypted_cf94abc85bdc_iv=[secure]
  </code></pre>