yikes,

2026-09-06 19:59:27 -04:00
parent 55d8e11a5d
commit fe3468c65d
247 changed files with 338183 additions and 0 deletions
@@ -0,0 +1,27 @@
+using System.Security.Cryptography;
+using System.Text;
+using Vanadium.Classes;
+
+namespace Vanadium.Utils
+{
+    public static class ImageSignatureValidation
+    {
+        public static string GenerateCacheKey(string path, int? w, int? h, bool crop)
+        {
+            string rawKey = $"{path}_{w}_{h}_{crop}";
+            byte[] hashBytes = SHA256.HashData(Encoding.UTF8.GetBytes(rawKey));
+            return Convert.ToHexString(hashBytes);
+        }
+
+        public static string SignPayload(byte[] payload, string sig)
+        {
+            using var rsa = RSA.Create();
+            rsa.ImportParameters(ServerConfig.RsaParams);
+
+            byte[] signatureBytes = rsa.SignData(payload, HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1);
+            string base64Signature = Convert.ToBase64String(signatureBytes);
+
+            return $"key-id=KEY:RSA:{sig}.rec.net; data={base64Signature};";
+        }
+    }
+}