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psse_decrypt.py
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psse_decrypt.py
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import os
import binascii
import sys
import struct
import math
import hashlib
from Crypto.Cipher import AES
from cryptography.hazmat.primitives.serialization import pkcs12
from cryptography.hazmat.primitives.asymmetric import padding
game_key = b""
content_id = b""
original_iv = b""
file_size = 0
total_blocks = 0
def ReadGameKey(filename): # Read from FAKE.RIF
global game_key
global content_id
riffd = open(filename, "rb")
riffd.seek(0x50, 0)
content_id = riffd.read(0x24)
riffd.seek(0x120, 0)
game_key = riffd.read(0x10)
riffd.close()
def ReadPublisherKey(p12, khapp): # used for PSM Developer Assistant (debug PSSE)
global game_key
print("[*] Reading PRIVATE KEY from "+p12)
pkcs12_file = open(p12, 'rb').read()
passphrase = b"password"
private_key, certificate, additional_certificates = pkcs12.load_key_and_certificates(pkcs12_file, passphrase) # Parse PKCS12 file
print("[*] Reading HKAPP "+khapp)
hkfd = open(khapp, "rb")
offset_by = 0
magic = hkfd.read(0x4)
if magic == b"PAKR": # Keyring
offset_by = 0x48
elif magic == b"tkdb": # Protected_kconsole.dat- needs more research
offset_by = 0x10
elif magic == b"PSHK": # Raw HKAPP
offset_by = 0
else:
print("[*] Invalid khapp, magic: "+magic.decode("UTF-8"))
exit()
hkfd.seek(0x200+offset_by, 0)
enc = hkfd.read(0x100)
dec = private_key.decrypt(enc, padding.PKCS1v15()) # RSA Decrypt
key = dec[0xC0:0xD0]
iv = dec[0xD0:0xE0]
hkfd.seek(0x80+offset_by, 0)
ebuffer = hkfd.read(0x240)
cipher = AES.new(key, AES.MODE_CBC, iv)
dec = cipher.decrypt(ebuffer) # AES Decrypt
# Dont know what these are for.
something1 = dec[0x00:0x10]
something2 = dec[0xA0:0xB0]
game_key = dec[0x60:0x70]
hkfd.close()
def IvRoll(location):
iv_next = location
iv = bytearray(original_iv)
new_iv = bytearray(iv_next.to_bytes(0x10, "little"))
for i in range(0,0x10):
new_iv[i] ^= iv[i]
return bytes(new_iv)
def GetBlock(fd, block_id):
global game_key
global file_size
global total_blocks
current_iv = IvRoll(block_id)
block_loc = block_id * 0x8000
total_read = 0x8000
trim_to = total_read
if block_id == 0: # Skip to filedata
block_loc = 0x680
total_read -= 0x680
trim_to = total_read
elif block_loc % 0x80000 == 0: # Skip signature block
block_loc += 0x400
total_read -= 0x400
trim_to = total_read
rd_amt = ((block_loc - 0x680) - (0x400*math.floor(block_loc / 0x80000))) # Total amount of file read so far.
if block_id >= total_blocks-1: # Is this the last block?
total_read = file_size - rd_amt
trim_to = total_read
total_read += (0x10-(total_read % 0x10))
if block_id > total_blocks-1:
return b""
if total_read <= 0:
return b""
fd.seek(block_loc, 0)
file_data = fd.read(total_read)
cipher = AES.new(game_key, AES.MODE_CBC, current_iv)
return cipher.decrypt(file_data)[:trim_to]
def DecryptFile(input_filename):
global game_key
global content_id
global original_iv
global file_size
global total_blocks
psm_dev = False
iv = b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F" # Header IV, used to find the real IV
key = b"\x4E\x29\x8B\x40\xF5\x31\xF4\x69\xD2\x1F\x75\xB1\x33\xC3\x07\xBE" # Header key for PSM Runtime and used in all retail games.
psm_dev_key = b"\x00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xAA\xBB\xCC\xDD\xEE\xFF" # Header key for PSM Dev, used for all files encrypted with psm_encryptor.dll
runtime_game_key = b"\xA8\x69\x3C\x4D\xF0\xAE\xED\xBC\x9A\xBF\xD8\x21\x36\x92\x91\x2D" # key for the PlayStation Mobile Runtime (eg used in Sce.PlayStation.Core.dll)
total_blocks = math.floor(os.path.getsize(input_filename) / 0x8000)+1
fd = open(input_filename, "rb")
# Check magic is "PSSE" or "PSME"
header = fd.read(4)
if header != b"PSSE" and header != b"PSME":
print("[*] "+input_filename.decode("UTF-8")+" is not a valid PSSE File")
print("[*] Is it already decrypted?")
exit()
# Check PSSE Version is 0x1 (not sure what it would be otherwise)
fd.seek(0x4, 0)
version = struct.unpack('i', fd.read(4))[0]
if version != 0x01:
print("[*] Unsupported PSSE version: "+str(version))
exit()
fd.seek(0x8, 0)
file_size = struct.unpack('Q', fd.read(8))[0]
fd.seek(0x10, 0)
psse_type = struct.unpack('i', fd.read(4))[0]
if psse_type != 0x1:
print("[*] Unknown PSSE Type: "+str(psse_type))
exit()
fd.seek(0x14, 0)
read_content_id = fd.read(0x24)
if read_content_id == b"IP9100-NPXS10074_00-0000000000000000": # Sce.PlayStation.Core.dll
game_key = runtime_game_key
elif read_content_id == (b"\x00"*0x24): # PSM developer assistant doenst include a Content ID
psm_dev = True
elif content_id != read_content_id:
print("[*] Content ID Mismatch! Expected: "+content_id.decode("UTF-8")+" but got "+read_content_id.decode("UTF-8"))
exit()
fd.seek(0x40, 0)
file_md5 = fd.read(0x10)
# Supposadly this contains the filename.
#fd.seek(0x50, 0)
#enc1 = fd.read(0x20)
#cipher = AES.new(key, AES.MODE_CBC, iv)
#dec1 = cipher.decrypt(enc1)
# Determine file IV
fd.seek(0x70, 0)
enc = fd.read(0x10)
if psm_dev:
key = psm_dev_key
cipher = AES.new(key, AES.MODE_CBC, iv)
original_iv = cipher.decrypt(enc)
total_file_data = b""
for i in range(0, total_blocks):
file_block = GetBlock(fd, i)
total_file_data += file_block
fd.close()
total_file_data = total_file_data[:file_size] # trim to file_size
md5 = hashlib.md5()
md5.update(total_file_data)
got_md5 = md5.digest()
if file_md5 != got_md5: # Verify decrypted file.
print("[*] MD5 Mismatch, Expected: "+binascii.hexlify(file_md5).decode("UTF-8")+" got: "+binascii.hexlify(got_md5).decode("UTF-8"))
print("[*] The game key is most likely wrong.")
exit();
return total_file_data
if len(sys.argv) <= 1:
print("PSSE Decryptor by SilicaAndPina v3")
print("(for retail games) <PSM_GAME_FOLDER>")
print("(for PSM Dev Packages) <PSM_GAME_FOLDER> <PSM_PUBLISHER_KEY> <PSM_HKAPP_OR_KRNG>")
print("(for anything) <PSM_GAME_FOLDER> <PSM_GAME_KEY>")
print("")
print("For retail games, you require the RO/License/FAKE.RIF file")
print("And for PSM Dev Packages, you need there original publisher key and keyring.")
exit()
file = sys.argv[1]
fpath = file.encode("UTF-8")
# Some dumb dirbusting shit.
applications_folder = b"/RO/Application/"
license_file = os.path.normpath(fpath+b"/RO/License/FAKE.rif")
psse_list = os.path.normpath(fpath+applications_folder+b"psse.list")
if not os.path.exists(psse_list):
applications_folder = b"/Application/"
license_file = os.path.normpath(fpath+b"/License/FAKE.rif")
psse_list = os.path.normpath(fpath+applications_folder+b"psse.list")
if not os.path.exists(psse_list):
applications_folder = b"/"
license_file = os.path.normpath(fpath+b"/../License/FAKE.rif")
psse_list = os.path.normpath(fpath+applications_folder+b"psse.list")
if not os.path.exists(psse_list):
print("[*] Cannot find psse.list.")
exit()
# Direct specify direct game key
if len(sys.argv) == 3:
game_key = binascii.unhexlify(sys.argv[2])
f = open(psse_list, "rb")
f.seek(0x14, os.SEEK_SET)
content_id = f.read(0x24)
f.close()
# Read from publisher license
if game_key == b"":
if len(sys.argv) == 4:
pkcs12name = sys.argv[2]
khappname = sys.argv[3]
print("[*] Reading Publisher Key and App Key")
if not os.path.exists(pkcs12name):
print("[*] Publisher Key not found")
exit()
if not os.path.exists(khappname):
print("[*] App key file not found.")
exit()
ReadPublisherKey(pkcs12name, khappname)
# Read from fake.rif
if game_key == b"":
if os.path.exists(license_file):
ReadGameKey(license_file)
# Is this a particular file rather than a games folder?
if os.path.isfile(fpath):
print("Decrypting: "+file)
data = DecryptFile(file)
open(fpath, "wb").write(data)
exit()
# If game key is still unknown after all of this, abandon all hope!
if game_key == b"":
print("[*] Game key is unknown, i cant decrypt this ! :(")
exit()
print("[*] psse.list: "+psse_list.decode("UTF-8"))
print("[*] Using game key: "+binascii.hexlify(game_key).decode("UTF-8"))
file_data = DecryptFile(psse_list)
file_list = file_data.replace(b"\r", b"").split(b"\n")
for psse_file in file_list:
if psse_file == b"":
continue
file_path = os.path.normpath(fpath+applications_folder+psse_file)
print("[*] Decrypting: "+file_path.decode("UTF-8"))
if os.path.exists(file_path):
decrypted_data = DecryptFile(file_path)
open(file_path, "wb").write(decrypted_data)
else:
print("[*] Error: File not Found: "+file_path.decode("UTF-8"))
open(psse_list, "wb").write(file_data)
print("[*] Decryption Complete!")