Bin To Nsp Link

#!/usr/bin/env python3
"""
bin2nsp.py - Convert BIN dumps to NSP format
"""
import os
import sys
import struct
import argparse
from pathlib import Path
class NSPBuilder:
NSP_MAGIC = b'NSP\0'
TICKET_SIZE = 0x2C0   # 704 bytes
CERT_SIZE   = 0x500   # 1280 bytes
TMD_SIZE    = 0x400    # 1024 bytes (typical)
def __init__(self, output_path):
    self.output_path = Path(output_path)
    self.sections = []
def add_bin_file(self, bin_path):
    """Add a raw BIN file as a section"""
    self.sections.append(
        'path': Path(bin_path),
        'offset': 0  # will be recalculated
    )
    return self
def add_ticket(self, ticket_path):
    """Add a ticket.bin file (required for NSP)"""
    self.ticket_path = Path(ticket_path)
    return self
def add_cert(self, cert_path):
    """Add a cert.bin file (optional but recommended)"""
    self.cert_path = Path(cert_path)
    return self
def add_tmd(self, tmd_path):
    """Add a title metadata file"""
    self.tmd_path = Path(tmd_path)
    return self
def _write_padding(self, f, alignment=0x200):
    """Pad to 512-byte boundary (NCA/NSP standard)"""
    pos = f.tell()
    pad = (alignment - (pos % alignment)) % alignment
    if pad:
        f.write(b'\x00' * pad)
def build(self):
    """Write final NSP file"""
    with open(self.output_path, 'wb') as nsp:
        # Write file header
        nsp.write(self.NSP_MAGIC)
        nsp.write(struct.pack('<I', 0x100))  # header size
        nsp.write(struct.pack('<I', len(self.sections)))  # section count
        nsp.write(b'\x00' * (0x100 - 16))  # reserved
section_offset = 0x100
# Write each section (raw BIN data)
        for idx, sec in enumerate(self.sections):
            size = os.path.getsize(sec['path'])
            sec['offset'] = section_offset
# Write section entry in header
            nsp.seek(0x100 + (idx * 0x20))
            nsp.write(struct.pack('<QQQ', sec['offset'], size, 0))  # offset, size, type
# Write actual data
            nsp.seek(sec['offset'])
            with open(sec['path'], 'rb') as bin_f:
                nsp.write(bin_f.read())
            self._write_padding(nsp)
            section_offset = nsp.tell()
# Append ticket, cert, TMD if provided
        if hasattr(self, 'ticket_path'):
            nsp.seek(0, 2)  # EOF
            ticket_start = nsp.tell()
            with open(self.ticket_path, 'rb') as f:
                nsp.write(f.read())
            self._write_padding(nsp)
            # Update NSP header with ticket offset
            nsp.seek(0x08)
            nsp.write(struct.pack('<Q', ticket_start))
if hasattr(self, 'cert_path'):
            nsp.seek(0, 2)
            with open(self.cert_path, 'rb') as f:
                nsp.write(f.read())
            self._write_padding(nsp)
if hasattr(self, 'tmd_path'):
            nsp.seek(0, 2)
            with open(self.tmd_path, 'rb') as f:
                nsp.write(f.read())
            self._write_padding(nsp)
print(f"[✓] NSP built: self.output_path (self.output_path.stat().st_size / 1e6:.2f MB)")

def merge_bin_files(bin_list, output_bin):
"""Merge multiple .bin.001, .bin.002 etc into one raw BIN"""
with open(output_bin, 'wb') as out:
for bin_file in sorted(bin_list):
with open(bin_file, 'rb') as inp:
out.write(inp.read())
return output_bin
def main():
parser = argparse.ArgumentParser(description='Convert BIN dump(s) to NSP')
parser.add_argument('input', nargs='+', help='BIN file(s) or pattern')
parser.add_argument('-o', '--output', required=True, help='Output .nsp file')
parser.add_argument('--ticket', help='Ticket.bin file')
parser.add_argument('--cert', help='Cert.bin file')
parser.add_argument('--tmd', help='TMD.bin file')
parser.add_argument('--merge', action='store_true', help='Merge multi-part BINs first')
args = parser.parse_args()
builder = NSPBuilder(args.output)
if args.merge and len(args.input) > 1:
    merged = Path(args.output).with_suffix('.merged.bin')
    print(f"Merging len(args.input) files into merged...")
    merge_bin_files(args.input, merged)
    builder.add_bin_file(merged)
    # Optionally delete merged temp file after? Keep for now.
else:
    for f in args.input:
        builder.add_bin_file(f)
if args.ticket:
    builder.add_ticket(args.ticket)
if args.cert:
    builder.add_cert(args.cert)
if args.tmd:
    builder.add_tmd(args.tmd)
builder.build()

if name == 'main':
main()

Summary

Key steps (typical workflow)

Tools commonly referenced

Pros

Cons / Risks

Alternatives

Practical tips

Note on legality and safety

Would you like a concise step-by-step command-line example for a common toolchain (assume you have legal access and necessary keys)? bin to nsp

Related search suggestions incoming.

Technical Report: "BIN to NSP" Conversion In the context of Nintendo Switch homebrew and modifications, "BIN to NSP"

primarily refers to the process of converting various binary files (such as game data or bootloader payloads) into an installable Nintendo Submission Package (.nsp)

. This allows these files to be launched directly from the Nintendo Switch home screen. 1. Primary Conversion Types

There is no single "BIN" format; rather, multiple binary file types associated with the Switch may need to be wrapped into an NSP for better accessibility: Payload Binaries (payload.bin):

Used for booting custom firmware (CFW) like Atmosphere. Converting these to NSP (forwarders) allows users to reboot or switch payloads without using an external RCM injector. Homebrew Executables (NRO to NSP): While technically

files, these are often referred to in conversion discussions. They are wrapped into NSP "forwarders" so homebrew apps appear as tiles on the main menu. Game Assets & Save Data (.bin): def merge_bin_files(bin_list, output_bin): """Merge multiple

Binary files used for game mods or save data (e.g., Smash Bros. stage files) can sometimes be packaged into an NSP for easier installation, though they are more commonly managed through specific save managers like Mig Switch Requirements: Mig Switch flashcart requires specific files (certificate and initial data) alongside

files to function. Users often look for ways to convert or merge these into standard formats for broader compatibility. 2. Recommended Tools

The following tools are widely used by the community for these conversion and management tasks:

| If your .bin is... | Do this... | | :--- | :--- | | A Switch Cartridge Dump | Use NSP Builder (Android) or 4NXCI (PC) to convert to .nsp. | | A Retro Game (PS1/Sega) | Do NOT convert. Use an emulator (RetroArch) and load the file directly. | | A GameCube/Wii Game | Convert to .iso or .wbfs, load via Dolphin emulator. | | Unknown/Corrupt | Check file size. If it is very small, it is likely a system file or junk data. |

The "Multiple .BIN" Scenario If you see files named game.bin, game.part1.bin, game.r00, or archive.part01.rar, these are compressed archives.

The "XCI to NSP" Scenario If you extract the files and get a large .xci file (Cartridge Dump), or if your source was an XCI to begin with, that is likely what you are trying to convert.