├── .github └── ISSUE_TEMPLATE │ ├── bug_report.md │ └── feature_request.md ├── .gitignore ├── COPYING ├── README.md ├── samloader ├── __init__.py ├── __main__.py ├── auth.py ├── crypt.py ├── fusclient.py ├── main.py ├── request.py └── versionfetch.py └── setup.py /.github/ISSUE_TEMPLATE/bug_report.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Bug report 3 | about: Create a bug report 4 | 5 | --- 6 | 7 | ## Description 8 | 9 | 10 | ## Reproduction Steps 11 | 12 | 13 | ## Output 14 | 15 | 16 | ## Environment 17 | 18 | -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/feature_request.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Feature request 3 | about: Suggest a new feature 4 | labels: enhancement 5 | 6 | --- 7 | 8 | ## Description 9 | 10 | 11 | ## Background 12 | 13 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | __pycache__ 2 | samloader.egg-info 3 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # samloader 2 | Download firmware for Samsung devices (without any extra Windows drivers). 3 | ## Installation 4 | ``` 5 | pip3 install git+https://github.com/nlscc/samloader.git 6 | ``` 7 | ## Usage 8 | Run with `samloader` or `python3 -m samloader`. See `samloader --help` and `samloader (command) --help` for help. 9 | 10 | `-m -r checkupdate`: Check the latest firmware version 11 | 12 | `-m -r download -v (-O or -o )`: Download the specified firmware version for a given phone and region to a specified file or directory 13 | 14 | `-m -r decrypt -v -V -i -o `: Decrypt encrypted firmware 15 | ### Example 16 | ``` 17 | $ samloader -m GT-I8190N -r BTU checkupdate 18 | I8190NXXAMJ2/I8190NBTUAMJ1/I8190NXXAMJ2/I8190NXXAMJ2 19 | $ samloader -m GT-I8190N -r BTU download -v I8190NXXAMJ2/I8190NBTUAMJ1/I8190NXXAMJ2/I8190NXXAMJ2 -O . 20 | downloading GT-I8190N_BTU_1_20131118100230_9ae3yzkqmu_fac.zip.enc2 21 | [################################] 10570/10570 - 00:02:02 22 | $ samloader -m GT-I8190N -r BTU decrypt -v I8190NXXAMJ2/I8190NBTUAMJ1/I8190NXXAMJ2/I8190NXXAMJ2 -V 2 -i GT-I8190N_BTU_1_20131118100230_9ae3yzkqmu_fac.zip.enc2 -o GT-I8190N_BTU_1_20131118100230_9ae3yzkqmu_fac.zip 23 | [################################] 169115/169115 - 00:00:08 24 | ``` 25 | -------------------------------------------------------------------------------- /samloader/__init__.py: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/topjohnwu/samloader/74ea6e3ac5de5b89d95259bdc3fd75bf53e8b95e/samloader/__init__.py -------------------------------------------------------------------------------- /samloader/__main__.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | from .main import main 5 | 6 | main() 7 | -------------------------------------------------------------------------------- /samloader/auth.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | # FUS authentication functions (decrypting nonce, calculating auth token) 5 | 6 | from Cryptodome.Cipher import AES 7 | import base64 8 | import requests 9 | 10 | KEY_1 = "hqzdurufm2c8mf6bsjezu1qgveouv7c7" 11 | KEY_2 = "w13r4cvf4hctaujv" 12 | 13 | unpad = lambda d: d[:-d[-1]] 14 | pad = lambda d: d + bytes([16 - (len(d) % 16)]) * (16 - (len(d) % 16)) 15 | 16 | def aes_encrypt(inp, key): 17 | cipher = AES.new(key, AES.MODE_CBC, key[:16]) 18 | return cipher.encrypt(pad(inp)) 19 | 20 | def aes_decrypt(inp, key): 21 | cipher = AES.new(key, AES.MODE_CBC, key[:16]) 22 | return unpad(cipher.decrypt(inp)) 23 | 24 | def getfkey(inp): 25 | key = "" 26 | for i in range(16): 27 | key += KEY_1[inp[i]] 28 | key += KEY_2 29 | return key.encode() 30 | 31 | def getauth(nonce): 32 | keydata = [ord(c) % 16 for c in nonce] 33 | fkey = getfkey(keydata) 34 | return base64.b64encode(aes_encrypt(nonce.encode(), fkey)).decode() 35 | 36 | def decryptnonce(inp): 37 | nonce = aes_decrypt(base64.b64decode(inp), KEY_1.encode()).decode() 38 | return nonce 39 | -------------------------------------------------------------------------------- /samloader/crypt.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | # Calculate keys and decrypt encrypted firmware packages. 5 | 6 | import hashlib 7 | import xml.etree.ElementTree as ET 8 | from Cryptodome.Cipher import AES 9 | from clint.textui import progress 10 | 11 | from . import request 12 | from . import fusclient 13 | from . import versionfetch 14 | 15 | unpad = lambda d: d[:-d[-1]] 16 | 17 | def getv4key(version, model, region): 18 | client = fusclient.FUSClient() 19 | req = request.binaryinform(version, model, region, client.nonce) 20 | resp = client.makereq("NF_DownloadBinaryInform.do", req) 21 | root = ET.fromstring(resp) 22 | fwver = root.find("./FUSBody/Results/LATEST_FW_VERSION/Data").text 23 | logicval = root.find("./FUSBody/Put/LOGIC_VALUE_FACTORY/Data").text 24 | deckey = request.getlogiccheck(fwver, logicval) 25 | return hashlib.md5(deckey.encode()).digest() 26 | 27 | def getv2key(version, model, region): 28 | deckey = region + ":" + model + ":" + version 29 | return hashlib.md5(deckey.encode()).digest() 30 | 31 | def decrypt_progress(inf, outf, key, length): 32 | cipher = AES.new(key, AES.MODE_ECB) 33 | assert length % 16 == 0 34 | chunks = length//4096+1 35 | for i in progress.bar(range(chunks)): 36 | block = inf.read(4096) 37 | if not block: 38 | break 39 | decblock = cipher.decrypt(block) 40 | if i == chunks - 1: 41 | outf.write(unpad(decblock)) 42 | else: 43 | outf.write(decblock) 44 | -------------------------------------------------------------------------------- /samloader/fusclient.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | # FUS request helper (automatically sign requests and update tokens) 5 | 6 | import requests 7 | 8 | from . import auth 9 | 10 | class FUSClient(object): 11 | def __init__(self): 12 | self.auth = "" 13 | self.sessid = "" 14 | self.makereq("NF_DownloadGenerateNonce.do") 15 | def makereq(self, path, data=""): 16 | authv = 'FUS nonce="", signature="' + self.auth + '", nc="", type="", realm="", newauth="1"' 17 | r = requests.post("https://neofussvr.sslcs.cdngc.net/" + path, data=data, 18 | headers={"Authorization": authv}, cookies={"JSESSIONID": self.sessid}) 19 | if "NONCE" in r.headers: 20 | self.encnonce = r.headers["NONCE"] 21 | self.nonce = auth.decryptnonce(self.encnonce) 22 | self.auth = auth.getauth(self.nonce) 23 | if "JSESSIONID" in r.cookies: 24 | self.sessid = r.cookies["JSESSIONID"] 25 | r.raise_for_status() 26 | return r.text 27 | def downloadfile(self, filename, start=0): 28 | authv = 'FUS nonce="' + self.encnonce + '", signature="' + self.auth + '", nc="", type="", realm="", newauth="1"' 29 | headers = {"Authorization": authv} 30 | if start > 0: 31 | headers["Range"] = "bytes={}-".format(start) 32 | r = requests.get("http://cloud-neofussvr.sslcs.cdngc.net/NF_DownloadBinaryForMass.do", 33 | params={"file": filename}, headers=headers, stream=True) 34 | r.raise_for_status() 35 | return r 36 | -------------------------------------------------------------------------------- /samloader/main.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | import argparse 5 | import os 6 | import base64 7 | import xml.etree.ElementTree as ET 8 | from clint.textui import progress 9 | 10 | from . import request 11 | from . import crypt 12 | from . import fusclient 13 | from . import versionfetch 14 | 15 | def main(): 16 | parser = argparse.ArgumentParser(description="Download and query firmware for Samsung devices.") 17 | parser.add_argument("-m", "--dev-model", help="device region code", required=True) 18 | parser.add_argument("-r", "--dev-region", help="device model", required=True) 19 | subparsers = parser.add_subparsers(dest="command") 20 | dload = subparsers.add_parser("download", help="download a firmware") 21 | dload.add_argument("-v", "--fw-ver", help="firmware version to download", required=True) 22 | dload.add_argument("-R", "--resume", help="resume an unfinished download", action="store_true") 23 | dload.add_argument("-M", "--show-md5", help="print the expected MD5 hash of the downloaded file", action="store_true") 24 | dload_out = dload.add_mutually_exclusive_group(required=True) 25 | dload_out.add_argument("-O", "--out-dir", help="output the server filename to the specified directory") 26 | dload_out.add_argument("-o", "--out-file", help="output to the specified file") 27 | chkupd = subparsers.add_parser("checkupdate", help="check for the latest available firmware version") 28 | decrypt = subparsers.add_parser("decrypt", help="decrypt an encrypted firmware") 29 | decrypt.add_argument("-v", "--fw-ver", help="encrypted firmware version", required=True) 30 | decrypt.add_argument("-V", "--enc-ver", type=int, choices=[2, 4], default=4, help="encryption version (default 4)") 31 | decrypt.add_argument("-i", "--in-file", help="encrypted firmware file input", required=True) 32 | decrypt.add_argument("-o", "--out-file", help="decrypted firmware file output", required=True) 33 | args = parser.parse_args() 34 | if args.command == "download": 35 | client = fusclient.FUSClient() 36 | path, filename, size = getbinaryfile(client, args.fw_ver, args.dev_model, args.dev_region) 37 | print("resuming" if args.resume else "downloading", filename) 38 | out = args.out_file if args.out_file else os.path.join(args.out_dir, filename) 39 | dloffset = os.stat(out).st_size if args.resume else 0 40 | if dloffset == size: 41 | print("already downloaded!") 42 | return 43 | fd = open(out, "ab" if args.resume else "wb") 44 | initdownload(client, filename) 45 | r = client.downloadfile(path+filename, dloffset) 46 | if args.show_md5 and "Content-MD5" in r.headers: 47 | print("MD5:", base64.b64decode(r.headers["Content-MD5"]).hex()) 48 | # TODO: use own progress bar instead of clint 49 | for chunk in progress.bar(r.iter_content(chunk_size=0x10000), expected_size=((size-dloffset)/0x10000)+1): 50 | if chunk: 51 | fd.write(chunk) 52 | fd.flush() 53 | fd.close() 54 | elif args.command == "checkupdate": 55 | print(versionfetch.getlatestver(args.dev_model, args.dev_region)) 56 | elif args.command == "decrypt": 57 | getkey = crypt.getv4key if args.enc_ver == 4 else crypt.getv2key 58 | key = getkey(args.fw_ver, args.dev_model, args.dev_region) 59 | length = os.stat(args.in_file).st_size 60 | with open(args.in_file, "rb") as inf: 61 | with open(args.out_file, "wb") as outf: 62 | crypt.decrypt_progress(inf, outf, key, length) 63 | 64 | def initdownload(client, filename): 65 | req = request.binaryinit(filename, client.nonce) 66 | resp = client.makereq("NF_DownloadBinaryInitForMass.do", req) 67 | 68 | def getbinaryfile(client, fw, model, region): 69 | req = request.binaryinform(fw, model, region, client.nonce) 70 | resp = client.makereq("NF_DownloadBinaryInform.do", req) 71 | root = ET.fromstring(resp) 72 | status = int(root.find("./FUSBody/Results/Status").text) 73 | if status != 200: 74 | raise Exception("DownloadBinaryInform returned {}, firmware could not be found?".format(status)) 75 | size = int(root.find("./FUSBody/Put/BINARY_BYTE_SIZE/Data").text) 76 | filename = root.find("./FUSBody/Put/BINARY_NAME/Data").text 77 | path = root.find("./FUSBody/Put/MODEL_PATH/Data").text 78 | return path, filename, size 79 | -------------------------------------------------------------------------------- /samloader/request.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | # Build FUS XML requests. 5 | 6 | import xml.etree.ElementTree as ET 7 | 8 | def getlogiccheck(inp, nonce): 9 | if len(inp) < 16: 10 | raise Exception("getlogiccheck() input too short") 11 | out = "" 12 | for c in nonce: 13 | out += inp[ord(c) & 0xf] 14 | return out 15 | 16 | def binaryinform(fw, model, region, nonce): 17 | fusmsg = ET.Element("FUSMsg") 18 | fushdr = ET.SubElement(fusmsg, "FUSHdr") 19 | ET.SubElement(fushdr, "ProtoVer").text = "1.0" 20 | fusbody = ET.SubElement(fusmsg, "FUSBody") 21 | fput = ET.SubElement(fusbody, "Put") 22 | ET.SubElement(ET.SubElement(fput, "ACCESS_MODE"), "Data").text = "2" 23 | ET.SubElement(ET.SubElement(fput, "BINARY_NATURE"), "Data").text = "1" 24 | ET.SubElement(ET.SubElement(fput, "CLIENT_PRODUCT"), "Data").text = "Smart Switch" 25 | ET.SubElement(ET.SubElement(fput, "DEVICE_FW_VERSION"), "Data").text = fw 26 | ET.SubElement(ET.SubElement(fput, "DEVICE_LOCAL_CODE"), "Data").text = region 27 | ET.SubElement(ET.SubElement(fput, "DEVICE_MODEL_NAME"), "Data").text = model 28 | ET.SubElement(ET.SubElement(fput, "LOGIC_CHECK"), "Data").text = getlogiccheck(fw, nonce) 29 | return ET.tostring(fusmsg) 30 | 31 | def binaryinit(filename, nonce): 32 | fusmsg = ET.Element("FUSMsg") 33 | fushdr = ET.SubElement(fusmsg, "FUSHdr") 34 | ET.SubElement(fushdr, "ProtoVer").text = "1.0" 35 | fusbody = ET.SubElement(fusmsg, "FUSBody") 36 | fput = ET.SubElement(fusbody, "Put") 37 | ET.SubElement(ET.SubElement(fput, "BINARY_FILE_NAME"), "Data").text = filename 38 | checkinp = filename.split(".")[0][-16:] 39 | ET.SubElement(ET.SubElement(fput, "LOGIC_CHECK"), "Data").text = getlogiccheck(checkinp, nonce) 40 | return ET.tostring(fusmsg) 41 | -------------------------------------------------------------------------------- /samloader/versionfetch.py: -------------------------------------------------------------------------------- 1 | # SPDX-License-Identifier: GPL-3.0+ 2 | # Copyright (C) 2020 nlscc 3 | 4 | # Get the latest firmware version for a device. 5 | 6 | import xml.etree.ElementTree as ET 7 | import requests 8 | 9 | def getlatestver(model, region): 10 | r = requests.get("https://fota-cloud-dn.ospserver.net/firmware/" + region + "/" + model + "/version.xml") 11 | r.raise_for_status() 12 | root = ET.fromstring(r.text) 13 | vercode = root.find("./firmware/version/latest").text 14 | if vercode is None: 15 | raise Exception("No latest firmware found") 16 | vc = vercode.split("/") 17 | if len(vc) == 3: 18 | vc.append(vc[0]) 19 | if vc[2] == "": 20 | vc[2] = vc[0] 21 | return "/".join(vc) 22 | -------------------------------------------------------------------------------- /setup.py: -------------------------------------------------------------------------------- 1 | import setuptools 2 | 3 | with open("README.md", "r") as fh: 4 | long_description = fh.read() 5 | 6 | setuptools.setup( 7 | name="samloader", 8 | version="0.2", 9 | author="nlscc", 10 | author_email="dontsendmailhere@example.com", 11 | description="A tool to download firmware for Samsung phones.", 12 | long_description=long_description, 13 | long_description_content_type="text/markdown", 14 | url="", 15 | packages=setuptools.find_packages(), 16 | classifiers=[ 17 | "Programming Language :: Python :: 3", 18 | "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)", 19 | "Operating System :: OS Independent", 20 | ], 21 | entry_points={ 22 | "console_scripts": [ 23 | "samloader = samloader.main:main", 24 | ], 25 | }, 26 | install_requires=[ 27 | "clint", 28 | "pycryptodomex", 29 | "requests" 30 | ], 31 | python_requires='>=3.6', 32 | ) 33 | --------------------------------------------------------------------------------