这段 Python 代码用 Java 怎么实现 - V2EX
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unco020511

这段 Python 代码用 Java 怎么实现

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  •   unco020511 Dec 3, 2021 3458 views
    This topic created in 1626 days ao, the information mentioned may be changed or developed.

    楼主确实没接触过 python

    def getHash(code, challenge): byteCode = to_byte_array(code) byteChallenge = to_byte_array(challenge) b = bytes(byteCode + byteChallenge) return sha512(b).hexdigest().upper() def to_byte_array(hexString: str): result = [] for i in range(0, len(hexString), 2): result.append(int(hexString[i : i + 2], 16)) return result 
    12 replies    2021-12-05 14:56:05 +08:00
    szq8014
        1
    szq8014  
       Dec 3, 2021
    org.apache.commons.codec.digest.DigestUtils.sha512Hex(code + challenge) ?
    pcbl
        2
    pcbl  
       Dec 3, 2021 via Android   2
    总感觉这 python 代码写的没有 python 味
    yangyaofei
        3
    yangyaofei  
       Dec 3, 2021
    一般 Python 程序猿肯定不会写这种 hash......

    c/c++ 的倒是有可能
    yanbo92
        4
    yanbo92  
       Dec 3, 2021 via iPhone
    sha512b 第一眼会忽略 512
    unco020511
        5
    unco020511  
    OP
       Dec 3, 2021
    @yangyaofei #这是抓的某个国外 app 的包,不是自己写的
    Juszoe
        6
    Juszoe  
       Dec 3, 2021
    这段代码逻辑挺简单的,一楼是正解。
    核心思想就是 sha512(code + challenge)
    unco020511
        7
    unco020511  
    OP
       Dec 3, 2021
    @szq8014 好像还是不太一样,我看上面代码不是做了什么每两个转一个 16 进制吗
    gleox
        8
    gleox  
       Dec 4, 2021
    to_byte_array()函数是把 16 进制字符串转换为 byte 数组。一个字节编码时对应的是 2 个 16 进制字符,所以解码 16 进制字符串的时候会截取 2 个字符转换为 1 个字节。
    iyaozhen
        9
    iyaozhen  
       Dec 4, 2021
    怎么感觉这个 py 代码是 java 转过去的,java 才常操作 byte array
    szq8014
        10
    szq8014  
       Dec 4, 2021
    @Juszoe
    @unco020511 里面的 code + challenge 需要再 Hex 转成 byte 一下, sha512 也支持直接传入 byte[]
    Juszoe
        11
    Juszoe  
       Dec 4, 2021
    @unco020511 #7 是每两个转成 16 进制,你既然读懂了写成 java 不是难事吧
    例如“FA12” -> 0xFA12
    2i2Re2PLMaDnghL
        12
    2i2Re2PLMaDnghL  
       Dec 5, 2021
    每两个字符被当作 Hex 转成 byte
    "3132333435363738" -> b"12345678"
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