- from sys import version_info
- def b(x):
- if version_info[0] == 2: return x
- else: return x.encode('latin1')
- assert(type(message) == type(b('')))
- block_size = 0
- n = key[0]
- while n:
- block_size += 1
- n >>= 8
- signature = pow(int(signature, 16), key[1], key[0])
- raw_bytes = []
- while signature:
- raw_bytes.insert(0, pack("B", signature & 0xFF))
- signature >>= 8
- signature = (block_size - len(raw_bytes)) * b('\x00') + b('').join(raw_bytes)
- if signature[0:2] != b('\x00\x01'): return False
- signature = signature[2:]
- if not b('\x00') in signature: return False
- signature = signature[signature.index(b('\x00'))+1:]
- if not signature.startswith(b('\x30\x31\x30\x0D\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20')): return False
- signature = signature[19:]
- if signature != sha256(message).digest(): return False
- return True
-
-def update_self(to_screen, verbose):
+ assert isinstance(message, bytes)
+ byte_size = (len(bin(key[0])) - 2 + 8 - 1) // 8
+ signature = ('%x' % pow(int(signature, 16), key[1], key[0])).encode()
+ signature = (byte_size * 2 - len(signature)) * b'0' + signature
+ asn1 = b'3031300d060960864801650304020105000420'
+ asn1 += sha256(message).hexdigest().encode()
+ if byte_size < len(asn1) // 2 + 11:
+ return False
+ expected = b'0001' + (byte_size - len(asn1) // 2 - 3) * b'ff' + b'00' + asn1
+ return expected == signature
+
+
+def update_self(to_screen, verbose, opener):