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[原创][推荐][原创] 2021 KCTF 秋季赛 防守方提交题目
发表于: 2021-10-7 11:36 7876

[原创][推荐][原创] 2021 KCTF 秋季赛 防守方提交题目

2021-10-7 11:36
7876

de23f9d82798377ea01743d43d5353cd

def pure_block_cipher_encrypt(p: list, k: list, round_n: int, constant_c: list):
    assert len(p) == 2
    assert len(k) == 2
    pl = p[0]
    pr = p[1]
    tmpl = pl
    tmpr = pr
    for i in range(round_n):
        tmpl, tmpr = pure_block_cipher_enc_round(tmpl, tmpr, k[i % 2], constant_c[i])
    return tmpl, tmpr
 
def pure_block_cipher_enc_round(xl, xr, ki, ci):
    yl = xr
    yr = xl + (xr + ki + ci)^3
    return (yl, yr)
def pure_block_cipher_encrypt(p: list, k: list, round_n: int, constant_c: list):
    assert len(p) == 2
    assert len(k) == 2
    pl = p[0]
    pr = p[1]
    tmpl = pl
    tmpr = pr
    for i in range(round_n):
        tmpl, tmpr = pure_block_cipher_enc_round(tmpl, tmpr, k[i % 2], constant_c[i])
    return tmpl, tmpr
 
def pure_block_cipher_enc_round(xl, xr, ki, ci):
    yl = xr
    yr = xl + (xr + ki + ci)^3

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最后于 2021-12-15 13:05 被kanxue编辑 ,原因:
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