如何将Keycloak默认签名算法从RSA改为HMAC？

Got it, let's walk through how to switch Keycloak's default JWT signature algorithm from RSA to HMAC. It's actually straightforward once you know where to look (it's not in the Keys page you mentioned— that section just displays the available keys):

• First, log into your Keycloak admin console and navigate to the realm you created.
• From the left sidebar, go to Realm Settings (not the Keys section).
• Switch to the Tokens tab in the top navigation of the Realm Settings page.
• Look for the dropdown labeled Default Signature Algorithm. You'll see options like HS256, HS384, HS512 — these are the HMAC-based algorithms. Select the one you want to use as the default.
• Click the Save button at the bottom of the page to apply the change.

Quick Note: Client-Specific Overrides #

If any of your clients have their own signature algorithm configured, that setting will take precedence over the realm's default. To check this:

• Go to the Clients section, select the client you want to verify.
• Go to the Settings tab, scroll down to the Advanced section.
• Look for the Signature Algorithm field. If it's set to a specific value (not the realm default), you'll need to update it to the HMAC algorithm you want, or set it back to inherit the realm's default.

After making these changes, generate a new JWT token for your realm/client and you'll see it uses the HMAC signature algorithm you configured.

内容的提问来源于stack exchange，提问作者codependent