logic855
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helm-external-secrets
mirror of https://github.com/external-secrets/external-secrets


			
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<h1 id="decoding-strategies">Decoding Strategies</h1>
<p>The External Secrets Operator has the feature to allow multiple decoding strategies during an object generation.</p>
<p>The <code>decodingStrategy</code> field allows the user to set the following Decoding Strategies based on their needs. <code>decodingStrategy</code> can be placed under <code>spec.data.remoteRef</code>, <code>spec.dataFrom.extract</code> or <code>spec.dataFrom.find</code>. It will configure the decoding strategy for that specific operation, leaving others with the default behavior if not set.</p>
<h3 id="none-default">None (default)</h3>
<p>ESO will not try to decode the secret value.</p>
<h3 id="base64">Base64</h3>
<p>ESO will try to decode the secret value using <a href="https://datatracker.ietf.org/doc/html/rfc4648#section-4">base64</a> method. If the decoding fails, an error is produced.</p>
<h3 id="base64url">Base64URL</h3>
<p>ESO will try to decode the secret value using <a href="https://datatracker.ietf.org/doc/html/rfc4648#section-5">base64url</a> method. If the decoding fails, an error is produced.</p>
<h3 id="auto">Auto</h3>
<p>ESO will try to decode using Base64/Base64URL strategies. If the decoding fails, ESO will apply decoding strategy None. No error is produced to the user.</p>
<h2 id="examples">Examples</h2>
<h3 id="setting-decoding-strategy-auto-in-a-datafromextract">Setting Decoding strategy Auto in a DataFrom.Extract</h3>
<p>Given that we have the given secret information:
<div class="highlight"><pre><span></span><code>{
    &quot;name&quot;: &quot;Gustavo&quot;,
    &quot;surname&quot;: &quot;Fring&quot;,
    &quot;address&quot;:&quot;aGFwcHkgc3RyZWV0&quot;,
}
</code></pre></div>
if we apply the following dataFrom:
<div class="highlight"><pre><span></span><code>spec:
  dataFrom:
  - extract:
      key: my-secret
      decodingStrategy: Auto
</code></pre></div>
It will render the following Kubernetes Secret:
<div class="highlight"><pre><span></span><code>data:
  name: R3VzdGF2bw==        #Gustavo
  surname: RnJpbmc=         #Fring
  address: aGFwcHkgc3RyZWV0 #happy street
</code></pre></div></p>
<h2 id="limitations">Limitations</h2>
<p>At this time, decoding Strategy Auto is only trying to check if the original input is valid to perform Base64 operations. This means that some non-encoded secret values might end up being decoded, producing gibberish. This is the case for numbered values like <code>123456</code> or some specially crafted string values such as <code>happy/street</code>. </p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>If you are using <code>decodeStrategy: Auto</code> and start to see ESO pulling completely wrong secret values into your kubernetes secret, consider changing it to <code>None</code> to investigate it.</p>
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