base64

模板

import base64
code = base64.b64decode(b'aaaaaa')

例题

qwb-heap2

}
    v14 = v5;
    if ( *(_BYTE *)(text + idx_add_2) == '=' )
    {
      idx_add_3 = idx_add_2 + 1;
      LODWORD(v7) = 0;
    }
    else
    {
      v8 = idx_add_2;
      idx_add_3 = idx_add_2 + 1;
      v7 = strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", *(char *)(text + v8))// 查找密文中的该字符在base64字符集中的位置
         - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";// 然后减去基地址得到偏移
    }