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Crypto

古典密码

RSA

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  • CRC32 碰撞脚本

    crc32.py -h
    usage: crc32.py [-h] action ...
    
    Reverse, undo, and calculate CRC32 checksums
    
    positional arguments:
      action
        flip      flip the bits to convert normal(msbit-first) polynomials to
                  reversed (lsbit-first) and vice versa
        reciprocal
                  find the reciprocal (Koopman notation) of a reversed (lsbit-
                  first) polynomial and vice versa
        table     generate a lookup table for a polynomial
        reverse   find a patch that causes the CRC32 checksum to become a desired
                  value
        undo      rewind a CRC32 checksum
        calc      calculate the CRC32 checksum
    
    optional arguments:
      -h, --help  show this help message and exit
    

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