diff --git a/lib/libnx/include/nx/xci.h b/lib/libnx/include/nx/xci.h
new file mode 100644
index 0000000..47d3c1e
--- /dev/null
+++ b/lib/libnx/include/nx/xci.h
@@ -0,0 +1,108 @@
+#include <string>
+#include <fnd/types.h>
+#include <fnd/List.h>
+#include <crypto/aes.h>
+#include <crypto/sha.h>
+#include <fnd/ISerialiseableBinary.h>
+
+namespace nx
+{
+	namespace xci
+	{
+		const std::string kXciSig = "HEAD";
+		static const uint32_t kHeaderEncOffset = 0x90;
+		static const uint32_t kHeaderEncSize = 0x70;
+		static const uint32_t kPageSize = 0x200;
+		static const uint32_t kCardKeyAreaPageCount = 8;
+		static const uint32_t kCardHeaderPageCount = 1;
+		static const uint32_t kReservedAreaPageCount = 55;
+		static const uint32_t kCertAreaStartPageAddress = kCardHeaderPageCount + kReservedAreaPageCount + kCardKeyAreaPageCount;
+		static const uint32_t kCertAreaPageCount = 64;
+		static const uint32_t kNormalAreaStartPageAddress = kReservedAreaPageCount + kCertAreaPageCount + kCardHeaderPageCount + kCardKeyAreaPageCount;
+
+
+		enum RomSize
+		{
+			ROM_SIZE_1GB = 0xFA,
+			ROM_SIZE_2GB = 0xF8,
+			ROM_SIZE_4GB = 0xF0,
+			ROM_SIZE_8GB = 0xE0,
+			ROM_SIZE_16GB = 0xE1,
+			ROM_SIZE_32GB = 0xE2
+		};
+
+		enum HeaderFlags
+		{
+			FLAG_AUTOBOOT,
+			FLAG_HISTORY_ERASE,
+			FLAG_REPAIR_TOOL
+		};
+
+		enum FwVersionIndex
+		{
+			FWVER_MINOR,
+			FWVER_MAJOR
+		};
+
+		enum CardClockRate
+		{
+			CLOCK_RATE_25 = 10551312,
+			CLOCK_RATE_50 = 10551313,
+		};
+	}
+	
+#pragma pack(push,1)
+	struct sXciHeader
+	{
+		char signature[4];
+		le_uint32_t rom_area_start_page;
+		le_uint32_t backup_area_start_page;
+		byte_t key_flag;
+		byte_t rom_size;
+		byte_t card_header_version;
+		byte_t flags;
+		le_uint64_t package_id;
+		le_uint32_t valid_data_end_page;
+		byte_t reserved_01[4];
+		byte_t encryption_iv[16];
+		le_uint64_t partition_fs_header_address;
+		le_uint64_t partition_fs_header_size;
+		byte_t partition_fs_header_hash[0x20];
+		byte_t initial_data_hash[0x20];
+		le_uint32_t sel_sec;
+		le_uint32_t sel_t1_key;
+		le_uint32_t sel_key;
+		le_uint32_t lim_area;
+		// START ENCRYPTION
+		le_uint32_t fw_version[2];
+		le_uint32_t acc_ctrl_1;
+		le_uint32_t wait_1_time_read;
+		le_uint32_t wait_2_time_read;
+		le_uint32_t wait_1_time_write;
+		le_uint32_t wait_2_time_write;
+		le_uint32_t fw_mode;
+		le_uint32_t upp_version;
+		byte_t reserved_03[0x4];
+		byte_t upp_hash[8];
+		le_uint64_t upp_id;
+		byte_t reserved_04[0x38];
+		// END ENCRYPTION
+	};
+
+	struct sInitialData
+	{
+		byte_t key_source[16]; // { package_id[8], zeros[8]}
+		byte_t title_key_enc[16];
+		byte_t ccm_mac[16];
+		byte_t ccm_nonce[12];
+	}; // sizeof() = 512 (1 page)
+
+	struct sKeyDataArea
+	{
+		sInitialData initial_data; // AES128-CCM encrypted {titlekey[16]}
+		byte_t encrypted_00[0x200*6]; // AES128-CTR encrypted {titlekey[16]}
+		byte_t encrypted_00_aesctr_data[0x100]; // RSA2048-OAEP-SHA256 encrypted AES-CTR data used for encrypted_00 {key[16],iv[16]}
+		byte_t reserved_01[0x100];
+	}; // sizeof() = 512*8 (8 pages)
+#pragma pack(pop)
+}