secretsdump.py 文件源码

def transformKey(self, InputKey):
        # Section 2.2.11.1.2 Encrypting a 64-Bit Block with a 7-Byte Key
        OutputKey = []
        OutputKey.append( chr(ord(InputKey[0]) >> 0x01) )
        OutputKey.append( chr(((ord(InputKey[0])&0x01)<<6) | (ord(InputKey[1])>>2)) )
        OutputKey.append( chr(((ord(InputKey[1])&0x03)<<5) | (ord(InputKey[2])>>3)) )
        OutputKey.append( chr(((ord(InputKey[2])&0x07)<<4) | (ord(InputKey[3])>>4)) )
        OutputKey.append( chr(((ord(InputKey[3])&0x0F)<<3) | (ord(InputKey[4])>>5)) )
        OutputKey.append( chr(((ord(InputKey[4])&0x1F)<<2) | (ord(InputKey[5])>>6)) )
        OutputKey.append( chr(((ord(InputKey[5])&0x3F)<<1) | (ord(InputKey[6])>>7)) )
        OutputKey.append( chr(ord(InputKey[6]) & 0x7F) )

        for i in range(8):
            OutputKey[i] = chr((ord(OutputKey[i]) << 1) & 0xfe)

        return "".join(OutputKey)