Add in complete Ticket support from Citra

src/core/ncch/cia_common.h

@@ -0,0 +1,39 @@
+// Copyright 2018 Citra Emulator Project / 2021 threeSD Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Core {
+
+enum TMDSignatureType : u32 {
+    Rsa4096Sha1 = 0x10000,
+    Rsa2048Sha1 = 0x10001,
+    EllipticSha1 = 0x10002,
+    Rsa4096Sha256 = 0x10003,
+    Rsa2048Sha256 = 0x10004,
+    EcdsaSha256 = 0x10005
+};
+
+inline u32 GetSignatureSize(u32 signature_type) {
+    switch (signature_type) {
+    case Rsa4096Sha1:
+    case Rsa4096Sha256:
+        return 0x200;
+
+    case Rsa2048Sha1:
+    case Rsa2048Sha256:
+        return 0x100;
+
+    case EllipticSha1:
+    case EcdsaSha256:
+        return 0x3C;
+    }
+
+    LOG_ERROR(Common_Filesystem, "Tried to read ticket with bad signature {}", signature_type);
+    return 0;
+}
+
+} // namespace Core