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Bits rotation
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| def rotate_left(byte): | |
| """ | |
| Rotate bits left. | |
| """ | |
| bit = byte & 0x80 | |
| byte <<= 1 | |
| if(bit): | |
| byte |= 0x01 | |
| byte &= 0xFF | |
| return byte | |
| def rotate_right(byte): | |
| """ | |
| Rotate bits right. | |
| """ | |
| byte &= 0xFF | |
| bit = byte & 0x01 | |
| byte >>= 1 | |
| if(bit): | |
| byte |= 0x80 | |
| return byte |
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