mirror of
https://github.com/JogmansonReal/Radicade.git
synced 2026-10-25 23:18:56 -07:00
JogmansonReal
146 lines
6.6 KiB
Python
146 lines
6.6 KiB
Python
"""Build an unsigned, logging-only diagnostic APK for the exact Quest Unity binary.
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Preserves certificate decisions. Adds Android log probes after native X509
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verification and after the Unity verification callback. Never edits the input.
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Run zipalign and sign with the installed test application's key afterward.
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"""
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import argparse
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import hashlib
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import struct
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import zipfile
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from pathlib import Path
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EXPECTED = 'd68dd33530dc9c6f963da17cad03d56fbaF51ac4bef297d05bf56684a44ee607'.lower()
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CAVE = 0x125AE00
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LIMIT = 0x125B100
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LOG_PRINT = 0xBA9F0
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def word(v):
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return struct.pack('<I', v)
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def branch(pc, target, link=False):
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delta = target - pc
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assert delta % 4 == 0 and -(1 << 27) <= delta < (1 << 27)
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return word((0x94000000 if link else 0x14000000) | ((delta >> 2) & 0x3FFFFFF))
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def adr(pc, target, reg):
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delta = target - pc
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assert -(1 << 20) <= delta < (1 << 20)
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return word(0x10000000 | ((delta & 3) << 29) | (((delta >> 2) & 0x7FFFF) << 5) | reg)
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def mov(dst, src, wide=True):
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return word((0xAA0003E0 if wide else 0x2A0003E0) | (src << 16) | dst)
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def pair(a, b, offset, load=False):
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return word((0xA9400000 if load else 0xA9000000) | ((offset // 8) << 15) | (b << 10) | (31 << 5) | a)
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def patch(binary, radicade_system_trust=False):
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assert hashlib.sha256(binary).hexdigest() == EXPECTED, 'Unknown Unity binary'
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out = bytearray(binary)
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assert not any(out[CAVE:LIMIT]), 'Diagnostic space is occupied'
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# Existing RX PT_LOAD ends before alignment padding; extend only into that
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# verified empty padding, staying before the following RW PT_LOAD file range.
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ph = struct.unpack_from('<Q', out, 32)[0]
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assert struct.unpack_from('<II', out, ph) == (1, 5)
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assert struct.unpack_from('<QQ', out, ph + 32) == (0x125ADF4, 0x125ADF4)
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struct.pack_into('<QQ', out, ph + 32, LIMIT, LIMIT)
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tag = CAVE + 0x240
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fmt1 = tag + 16
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fmt2 = fmt1 + 96
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strings = {
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tag: b'RadicadeTLS\0',
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fmt1: b'x509 result=%d raw_flags=0x%x unity_flags=0x%x hostname=%s callback=%p\0',
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fmt2: b'callback result=0x%x callback=%p error_code=%u\0',
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}
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for addr, data in strings.items():
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assert addr + len(data) <= LIMIT
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out[addr:addr + len(data)] = data
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probes = [(0x75BA0C, CAVE, fmt1), (0x75F3B8, CAVE + 0x120, fmt2)]
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for hook, start, fmt in probes:
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code = bytearray(word(0xD10283FF)) # sub sp, sp, #160
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for reg in range(0, 18, 2):
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code += pair(reg, reg + 1, reg * 8)
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code += pair(18, 30, 144)
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if hook == 0x75BA0C:
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assert binary[hook:hook+4] == word(0x1284DFE8) # mov w8, #-0x2700
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code += mov(3, 21, False)
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code += word(0xB8400000 | ((-0x5C & 0x1FF) << 12) | (29 << 5) | 4)
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code += mov(5, 20, False) + mov(6, 28) + mov(7, 25)
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else:
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assert binary[hook:hook+4] == word(0xB90AC280) # str w0, [x20,#0xac0]
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code += mov(3, 0, False) + mov(4, 24)
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# Original errorstate at pre-probe SP+0x10; code is its +4 field.
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code += word(0xB9400000 | ((180 // 4) << 10) | (31 << 5) | 5)
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code += word(0x52800080) # mov w0, #4 (INFO)
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code += adr(start + len(code), tag, 1)
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code += adr(start + len(code), fmt, 2)
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code += branch(start + len(code), LOG_PRINT, True)
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for reg in range(0, 18, 2):
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code += pair(reg, reg + 1, reg * 8, True)
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code += pair(18, 30, 144, True)
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code += word(0x910283FF) # add sp, sp, #160
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code += binary[hook:hook+4]
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code += branch(start + len(code), hook + 4)
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assert len(code) <= 0x120
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out[start:start+len(code)] = code
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out[hook:hook+4] = branch(hook, start)
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if radicade_system_trust:
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# Route only this exact hostname through Unity's existing platform-root
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# verifier. It checks the complete chain AND hostname. All other hosts
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# retain the configured managed callback. No accept-all return patch.
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start = CAVE + 0x90
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host = CAVE + 0x2E0
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hook = 0x75F3B4
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assert binary[hook:hook+4] == word(0xD63F0300) # blr x24
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hostname = b'ns.radicade.app\0'
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out[host:host+len(hostname)] = hostname
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code = bytearray(word(0xD10083FF)) # sub sp, sp, #32
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code += pair(0, 1, 0) + pair(2, 30, 16)
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code += word(0xF9400000 | ((0xA90 // 8) << 10) | (20 << 5))
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# A null hostname must keep the original path.
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null_branch = len(code)
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code += word(0)
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code += adr(start + len(code), host, 1)
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code += branch(start + len(code), 0xBA7D0, True) # strcmp
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mismatch_branch = len(code)
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code += word(0)
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code += pair(0, 1, 0, True) + pair(2, 30, 16, True)
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code += word(0x910083FF) + mov(0, 20)
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code += branch(start + len(code), 0x75F5D0, True)
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code += branch(start + len(code), hook + 4)
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original_path = start + len(code)
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code += pair(0, 1, 0, True) + pair(2, 30, 16, True)
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code += word(0x910083FF) + binary[hook:hook+4]
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code += branch(start + len(code), hook + 4)
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struct.pack_into('<I', code, null_branch, 0xB4000000 | (((original_path - start - null_branch) // 4) << 5))
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struct.pack_into('<I', code, mismatch_branch, 0x35000000 | (((original_path - start - mismatch_branch) // 4) << 5))
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assert len(code) <= 0x90
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out[start:start+len(code)] = code
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out[hook:hook+4] = branch(hook, start)
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return bytes(out)
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def main():
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p = argparse.ArgumentParser(description=__doc__)
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p.add_argument('input', type=Path)
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p.add_argument('output', type=Path)
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p.add_argument('--radicade-system-trust', action='store_true', help='Use Unity platform certificate+hostname verification for the exact Radicade host')
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args = p.parse_args()
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if args.output.exists():
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raise SystemExit('Output already exists; choose a new file')
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args.output.parent.mkdir(parents=True, exist_ok=True)
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with zipfile.ZipFile(args.input) as source:
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original = source.read('lib/arm64-v8a/libunity.so')
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modified = patch(original, args.radicade_system_trust)
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with zipfile.ZipFile(args.output, 'w') as target:
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for entry in source.infolist():
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if entry.filename.upper().startswith('META-INF/') and entry.filename.upper().endswith(('.RSA', '.SF', '.MF', '.DSA', '.EC')):
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continue
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data = modified if entry.filename == 'lib/arm64-v8a/libunity.so' else source.read(entry)
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target.writestr(entry, data)
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print('Unsigned diagnostic APK:', args.output)
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print('Patched Unity SHA256:', hashlib.sha256(modified).hexdigest())
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if __name__ == '__main__':
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main()
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