Issue #6: implement api key hashing and verification

2026-04-26 16:40:36 -04:00
parent 4094e64ee0
commit 696be17139
17 changed files with 524 additions and 0 deletions
@@ -0,0 +1,45 @@
+namespace MxGateway.Server.Security.Authentication;
+
+public sealed class ApiKeyParser : IApiKeyParser
+{
+    private const string BearerPrefix = "Bearer ";
+    private const string TokenPrefix = "mxgw_";
+
+    public bool TryParseAuthorizationHeader(string? authorizationHeader, out ParsedApiKey? apiKey)
+    {
+        apiKey = null;
+
+        if (string.IsNullOrWhiteSpace(authorizationHeader)
+            || !authorizationHeader.StartsWith(BearerPrefix, StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        string token = authorizationHeader[BearerPrefix.Length..].Trim();
+
+        if (!token.StartsWith(TokenPrefix, StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        string keyPayload = token[TokenPrefix.Length..];
+        int separatorIndex = keyPayload.IndexOf('_', StringComparison.Ordinal);
+
+        if (separatorIndex <= 0 || separatorIndex == keyPayload.Length - 1)
+        {
+            return false;
+        }
+
+        string keyId = keyPayload[..separatorIndex];
+        string secret = keyPayload[(separatorIndex + 1)..];
+
+        if (string.IsNullOrWhiteSpace(keyId) || string.IsNullOrWhiteSpace(secret))
+        {
+            return false;
+        }
+
+        apiKey = new ParsedApiKey(keyId, secret);
+
+        return true;
+    }
+}