Web

HGAME 2020 week1 writeup Web Cosmos 的博客 看提示去 GitHub 上找这个网站的源代码，搜索 Cosmos Hgame 就可以找到，点开 3 commits，点开 new file 就可以看到： aGdhbWV7ZzF0X2xlQGtfMXNfZGFuZ2VyMHVzXyEhISF9 base64 解码得到 flag: hgame{g1t_le@k_1s_danger0us_!!!} Crypto InfantRSA 题目： p = 681782737450022065655472455411; q = 675274897132088253519831953441; e = 13; c = pow(m, e, p * q) = 275698465082361070145173688411496311542172902608559859019841 exp： p = 681782737450022065655472455411 q = 675274897132088253519831953441 e = 13 c = 275698465082361070145173688411496311542172902608559859019841 def egcd(a, b): if a == 0: return (b, 0, 1) else: g, y, x = egcd(b % a, a) return (g, x - (b // a) * y, y) def modinv(a, m): g, x, y = egcd(a, m) if g !...