## [RE] uniapp - cew

f["encrypt"](c)调用类似chacha加密的函数，依葫芦画瓢解密即可

``iv = [0, 0, 0, 0, 0, 0, 0, 74, 0, 0, 0, 0]``key = [_ for _ in range(32)]              ``def _get32(t, e):``    return t[e] ^ t[e+1] << 8 ^ t[e+2] << 16 ^ t[e+3] << 24``n = 1``_rounds = 20``_sigma = [1634760805, 857760878, 2036477234, 1797285236]``_param = [_sigma[0], _sigma[1], _sigma[2], _sigma[3], _get32(key, 0), _get32(key, 4), _get32(key, 8), _get32(key, 12), _get32(key, 16), _get32(key, 20), _get32(key, 24), _get32(key, 28), n, _get32(iv, 0), _get32(iv, 4), _get32(iv, 8)]``_keystream = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]``_byteCounter = 0``def _rotl(num, e):``    return (num << e | num >> 32 - e) & 0xffffffff``def _quarterround(t, e, n, r, o):``    print(t)``    t[e] += t[n]``    t[e] &= 0xffffffff``    t[o``

## [RE] capp - cew

``#define _CRT_SECURE_NO_WARNINGS``#include <cstdio>``#include <cstdlib>``unsigned char input[38] = { 0 };``unsigned char ctr = 0;``char my_getchar() {``    return input[ctr++];``}``int main(int argc, const char** argv, const char** envp)``{``    int result; // w0``    long long v4; // [xsp+0h] [xbp+0h] BYREF``    int* v5; // [xsp+20h] [xbp+20h]``    long long v6; // [xsp+28h] [xbp+28h]``    int v7; // [xsp+34h] [xbp+34h]``    int i; // [xsp+38h] [xbp+38h]``    int j; // [xsp+3Ch] [xbp+3Ch]``    v7 = 1000;``    v6 = 999LL;``    //   v5 = (int *)(4 * (((unsigned __int64)&v4 + 3) >> 2));``    v5 = (int*)malloc(4 * 10000);``    i = 0;``    //   slogan();``    scanf("%s", (char*)input);``    for (i = 0; i < v7; ++i)``        v5[i] = 0;``    for (j = 43; v5[j]; --v5[j])``        ;``    ++j;``    --j;``    ++j;``    while (v5[j])``        --v5[j];``    for (j -= 43; v5[j]; --v5[j])``        ;``    for (j += 42; v5[j]; --v5[j])``    {``     ``