From 29f26e72b5fd4e918c8d0d9f9d9ae384f7052a0a Mon Sep 17 00:00:00 2001
From: Kieran <kieran@harkin.me>
Date: Mon, 24 Apr 2023 10:32:03 +0100
Subject: [PATCH] NIP-98

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+NIP-98
+======
+
+HTTP Auth
+-------------------------
+
+`draft` `optional` `author:kieran` `author:melvincarvalho`
+
+This NIP defines and ephemerial event used to authenticate requests to HTTP servers using nostr events.
+
+This is useful for HTTP services which are build for Nostr and deal with Nostr user accounts.
+
+## Nostr event
+
+A `kind 27235` (In reference to [RFC 7235](https://www.rfc-editor.org/rfc/rfc7235)) event is used.
+
+The `content` SHOULD be empty.
+
+The following tags are defined as REQUIRED.
+
+* `url` - absolute URL
+* `method` - HTTP Request Method 
+
+Example event:
+```json
+{
+    "id": "fe964e758903360f28d8424d092da8494ed207cba823110be3a57dfe4b578734",
+    "pubkey": "63fe6318dc58583cfe16810f86dd09e18bfd76aabc24a0081ce2856f330504ed",
+    "content": "",
+    "kind": 27235,
+    "created_at": 1682327852,
+    "tags": [
+        [
+            "url",
+            "https://api.snort.social/api/v1/n5sp/list"
+        ],
+        [
+            "method",
+            "GET"
+        ]
+    ],
+    "sig": "5ed9d8ec958bc854f997bdc24ac337d005af372324747efe4a00e24f4c30437ff4dd8308684bed467d9d6be3e5a517bb43b1732cc7d33949a3aaf86705c22184"
+}
+```
+
+Servers MUST perform the following checks in order to validate the event:
+1. The `kind` MUST be `27235`.
+2. The `created_at` MUST be within a reasonable time window (suggestion 60 seconds).
+3. The `url` tag MUST be exactly the same as the absolute request URL (including query parameters).
+4. The `method` tag MUST be the same HTTP method used for the requested resource.
+
+All other checks which server MAY do are OPTIONAL, and implementation specific.
+
+## Request Flow
+
+Using the `Authorization` header, the `kind 27235` event MUST be `base64` encoded and use the Authorization scheme `Nostr`
+
+Example HTTP Authorization header:
+```
+Authorization: Nostr eyJpZCI6ImZlOTY0ZTc1ODkwMzM2MGYyOGQ4NDI0ZDA5MmRhODQ5NGVkMjA3Y2JhODIzMTEwYmUzYTU3ZGZlNGI1Nzg3MzQiLCJwdWJrZXkiOiI2M2ZlNjMxOGRjNTg1ODNjZmUxNjgxMGY4NmRkMDllMThiZmQ3NmFhYmMyNGEwMDgxY2UyODU2ZjMzMDUwNGVkIiwiY29udGVudCI6IiIsImtpbmQiOjI3MjM1LCJjcmVhdGVkX2F0IjoxNjgyMzI3ODUyLCJ0YWdzIjpbWyJ1cmwiLCJodHRwczovL2FwaS5zbm9ydC5zb2NpYWwvYXBpL3YxL241c3AvbGlzdCJdLFsibWV0aG9kIiwiR0VUIl1dLCJzaWciOiI1ZWQ5ZDhlYzk1OGJjODU0Zjk5N2JkYzI0YWMzMzdkMDA1YWYzNzIzMjQ3NDdlZmU0YTAwZTI0ZjRjMzA0MzdmZjRkZDgzMDg2ODRiZWQ0NjdkOWQ2YmUzZTVhNTE3YmI0M2IxNzMyY2M3ZDMzOTQ5YTNhYWY4NjcwNWMyMjE4NCJ9
+```
+
+## References
+- C# ASP.NET `AuthenticationHandler` [NostrAuth.cs](https://gist.github.com/v0l/74346ae530896115bfe2504c8cd018d3)
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