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feat: fallback to SameSite Lax mode if cookie is not secure (#1105)

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Also, will allow to set cookie `SameSite` mode on command line or
environment. Note that `None` mode will be forced to ``Lax`` if
cookie is set to not be secure.

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>
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Valentin Lab 2025-09-13 18:56:54 +08:00 • committed by GitHub
parent 401e18f29f
commit 29ae2a4b87
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6 changed files with 94 additions and 2 deletions
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docs/docs/admin/installation.mdx
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@ -69,6 +69,7 @@ Anubis uses these environment variables for configuration:
| `COOKIE_PARTITIONED` | `false` | If set to `true`, enables the [partitioned (CHIPS) flag](https://developers.google.com/privacy-sandbox/cookies/chips), meaning that Anubis inside an iframe has a different set of cookies than the domain hosting the iframe. |
| `COOKIE_PREFIX` | `anubis-cookie` | The prefix used for browser cookies created by Anubis. Useful for customization or avoiding conflicts with other applications. |
| `COOKIE_SECURE` | `true` | If set to `true`, enables the [Secure flag](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Cookies#block_access_to_your_cookies), meaning that the cookies will only be transmitted over HTTPS. If Anubis is used in an unsecure context (plain HTTP), this will be need to be set to false |
| `COOKIE_SAME_SITE` | `None` | Controls the cookie’s [`SameSite` attribute](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie#samesitesamesite-value). Allowed: `None`, `Lax`, `Strict`, `Default`. `None` permits cross-site use but modern browsers require it to be **Secure**—so if `COOKIE_SECURE=false` or you serve over plain HTTP, use `Lax` (recommended) or `Strict` or the cookie will be rejected. `Default` uses the Go runtime’s `SameSiteDefaultMode`. `None` will be downgraded to `Lax` automatically if cookie is set NOT to be secure. |
| `DIFFICULTY` | `4` | The difficulty of the challenge, or the number of leading zeroes that must be in successful responses. |
| `DIFFICULTY_IN_JWT` | `false` | If set to `true`, adds the `difficulty` field into JWT claims, which indicates the difficulty the token has been generated. This may be useful for statistics and debugging. |
| `ED25519_PRIVATE_KEY_HEX` | unset | The hex-encoded ed25519 private key used to sign Anubis responses. If this is not set, Anubis will generate one for you. This should be exactly 64 characters long. **Required when using persistent storage backends** (like bbolt) to ensure challenges survive service restarts. When running multiple instances on the same base domain, the key must be the same across all instances. See below for details. |