Bin To Nsp [TOP]

#!/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()

Create a folder on your desktop called BIN2NSP. Download:

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)?

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This is the easiest method for mobile users.

What it is

Common reasons to convert

Important legal and safety notes (brief) bin to nsp

Typical workflows (high-level)

  • Extract or split the .bin if needed

  • Prepare NSP layout

  • Build/sign the NSP

  • Verification and installation

    • Practical tools (examples)

    Step-by-step example (assumes .bin is a Switch game dump needing NSP packaging)

    Practical tips

    Common pitfalls

    If you want, I can:

    The Ultimate Guide to Converting BIN to NSP: A Step-by-Step Tutorial

    Are you a gamer looking to convert your BIN files to NSP for seamless installation on your Nintendo Switch console? Or perhaps you're a developer seeking to understand the intricacies of file conversion for your projects? Whatever your reason, this comprehensive article will walk you through the process of converting BIN to NSP, covering the what, why, and how of this essential conversion.

    What are BIN and NSP files?

    Before diving into the conversion process, it's essential to understand what BIN and NSP files are and their roles in the gaming world.

    Why convert BIN to NSP?

    Converting BIN to NSP is necessary for several reasons:

    Methods for converting BIN to NSP

    There are a few methods to convert BIN to NSP, each with its pros and cons:

    Once you have your .nsp file:

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