FileSys/cia: add ticket parsing

src/core/file_sys/ticket.h

@@ -0,0 +1,58 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <string>
+#include <vector>
+#include <boost/optional.hpp>
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/swap.h"
+
+namespace Loader {
+enum class ResultStatus;
+}
+
+namespace FileSys {
+class Ticket {
+public:
+#pragma pack(push, 1)
+    struct Body {
+        std::array<u8, 0x40> issuer;
+        std::array<u8, 0x3C> ecc_public_key;
+        u8 version;
+        u8 ca_crl_version;
+        u8 signer_crl_version;
+        std::array<u8, 0x10> title_key;
+        INSERT_PADDING_BYTES(1);
+        u64_be ticket_id;
+        u32_be console_id;
+        u64_be title_id;
+        INSERT_PADDING_BYTES(2);
+        u16_be ticket_title_version;
+        INSERT_PADDING_BYTES(8);
+        u8 license_type;
+        u8 common_key_index;
+        INSERT_PADDING_BYTES(0x2A);
+        u32_be eshop_account_id;
+        INSERT_PADDING_BYTES(1);
+        u8 audit;
+        INSERT_PADDING_BYTES(0x42);
+        std::array<u8, 0x40> limits;
+        std::array<u8, 0xAC> content_index;
+    };
+    static_assert(sizeof(Body) == 0x210, "Ticket body structure size is wrong");
+#pragma pack(pop)
+
+    Loader::ResultStatus Load(const std::vector<u8> file_data, std::size_t offset = 0);
+    boost::optional<std::array<u8, 16>> GetTitleKey() const;
+
+private:
+    Body ticket_body;
+    u32_be signature_type;
+    std::vector<u8> ticket_signature;
+};
+} // namespace FileSys