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Mar 6, 2025
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[cloudflare] Add nextauth infos #88

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[cloudflare] Add nextauth infos
markdembo Mar 6, 2025
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markdembo Mar 6, 2025
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Fix missing import and formatting
markdembo Mar 6, 2025
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Update pages/cloudflare/howtos/NextAuth.mdx
markdembo Mar 6, 2025
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20 changes: 20 additions & 0 deletions pages/cloudflare/howtos/NextAuth.mdx
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Expand Up @@ -4,6 +4,11 @@ NextAuth.js is an open-source authentication solution for Next.js applications.

### Solving a broken build

<Callout>
This section offers a solution for NextAuth.js v4. Use of v5 is currently blocked by the lack of `createCipheriv` implementation.
</Callout>


NextAuth.js relies on [`createCipheriv`](https://nodejs.org/docs/v22.13.1/api/crypto.html#cryptocreatecipherivalgorithm-key-iv-options) from [`node:crypto`](https://nodejs.org/docs/v22.13.1/api/crypto.html).

`createCipheriv` is not currently implemented by the workerd runtime so apps using NextAuth.js with the default configuration break at build time.
Expand All @@ -28,3 +33,18 @@ Kudos to Arnav Gupta ([`@arnavgupta00`](https://github.com/arnavgupta00)) for co
You can find an example of this on his [example repository](https://github.com/arnavgupta00/deployment-cf-workers-prisma-nextauth).

Related issues: [`workers-sdk#206`](https://github.com/opennextjs/opennextjs-cloudflare/issues/206) and [`workerd#3277`](https://github.com/cloudflare/workerd/issues/3277).

### Solving issues in local dev

When trying to access bindings (for instance to use [D1](/d1/) as database) depending on your implementation, you might run into:

`ERROR: getCloudflareContext has been called without having called initOpenNextCloudflareForDev from the Next.js config file.`

You can resolve this issue, by following the the following pattern in your `auth.ts` configuration:

```
export const { handlers, auth, signIn, signOut } = NextAuth( async _ => {
let { env } = await getCloudflareContext({async: true})
..
}
```
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