upgpkg: discord-electron-openasar 0.0.59+828-2: update krisp patcher

* Fix segfault after patching Krisp binary
This commit is contained in:
Manuel 2024-07-14 23:57:30 +02:00
parent 10a0cea6bf
commit a18f9f79d4
Signed by: Manuel
GPG key ID: 4085037435E1F07A
3 changed files with 8 additions and 6 deletions

View file

@ -41,9 +41,10 @@ found_issigned_by_discord_test = False
found_issigned_by_discord_je = False
found_already_patched = False
je_location = None
je_size = 0
# We are looking for a call to IsSignedByDiscord, followed by a test, followed by a je.
# Then we patch the je into a two byte nop.
# Then we replace the je with nops.
md = Cs(CS_ARCH_X86, CS_MODE_64)
md.detail = True
@ -61,6 +62,7 @@ for i in md.disasm(krisp_initialize, krisp_initialize_address):
if found_issigned_by_discord_test:
found_issigned_by_discord_je = True
je_location = i.address
je_size = len(i.bytes)
break
if i.id == X86_INS_NOP:
@ -74,7 +76,7 @@ if je_location:
shutil.copyfile(executable, executable + ".orig")
f = open(executable, 'rb+')
f.seek(je_location - address_to_file)
f.write(b'\x66\x90') # Two byte NOP
f.write(b'\x90' * je_size) # je can be larger than 2 bytes given a large enough displacement :(
f.close()
else:
if found_already_patched: