SISE_Traning_CTF_RE | SNST Traning RE Project .华软网络安全小组逆向工程训练营 , 尝试以CTF | Hacking library
kandi X-RAY | SISE_Traning_CTF_RE Summary
kandi X-RAY | SISE_Traning_CTF_RE Summary
###SNST Reverse Engineering Traning. 把代码导入到IDA ,用Hex-ray 把Main 函数汇编转到伪C 代码,结果如下. Ollydbg 会卡在0x40109D 这个地方(下断点的快捷键是F2 ). 程序原理:判断输入的字符串长度是否为19 ,符合的话把输入的字符串里面的每个字符的值加50 和byte_408030 里面的数据进行对比,于是我们把进去byte_408030 ,设置它的Array (数组)长度. 提取这些数据出来,拿到python 里面做逆运算(因为程序是把我们输入的数据加上50 再和这些数据做比较的,所以我们把这些数据减50 就可以获取到原来的字符串了). 跳到jmp loc_401113 中分析代码,可以看到这里有SEH 异常处理,异常回调的地址是0x401053. 可以看到这里的对比运算:输入的字符串和byte_40B938 里面的数据做异或运算之后再对比两个字符是否相同,异或运算的key 是80 加上当前对比的偏移位置,于是可以写出解密python. 第一步首先要绕过IDA 本身的bug ,因为IDA 默认是从第一区块开始解析数据的,但是在入口点中的跳转却是在第一区块之前的,所以IDA 无法从这个位置中获取数据,于是使用OllyDbg 跟踪. sub_40102D 的代码如下(为什么会显示sub_401400 呢?因为代码是从sub_40102D 直接jmp 到sub_401400 的):从PEB 中获取程序是否被调试. 因为Push EAX + Retn 等价于Jmp Eax ,eax 的值是ecx+40 (sub -40 等于add 40),ecx 的值是这个函数的入口地址,于是可以计算出接下来程序运行到这里的将会跳转到下面这个地址. Case 3 把OK 写入缓冲区. Case 4 是flag 对比,然后我们把精力主要集中在此. 可以看到,一个是0x10 ,一个是缓冲区地址,所以我们可以大胆的确定,a1 是要加密的数据地址,a2 是数据长度.
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Trending Discussions on Hacking
QUESTION
I am learning SwiftUI on 100 Days of SwiftUI on Hacking with Swift. My Xcode SwiftUI Preview crashes and I don't know why. Running on Simulator works though. I tried to completely reinstall Xcode (deleting the app, preferences, libraries etc), but it still doesn't work. I am using Xcode 13.2.1 on iMac 2019 i9 9900K 64GB RAM.
Here is the problem details. (cannot contain full report because of 30000 word limit)
...ANSWER
Answered 2022-Mar-29 at 10:26Solved by adding ZStack in Preview struct solved it.. This is maybe a bug. Solution
QUESTION
I have source (src
) image(s) I wish to align to a destination (dst
) image using an Affine Transformation whilst retaining the full extent of both images during alignment (even the non-overlapping areas).
I am already able to calculate the Affine Transformation rotation and offset matrix, which I feed to scipy.ndimage.interpolate.affine_transform
to recover the dst
-aligned src
image.
The problem is that, when the images are not fuly overlapping, the resultant image is cropped to only the common footprint of the two images. What I need is the full extent of both images, placed on the same pixel coordinate system. This question is almost a duplicate of this one - and the excellent answer and repository there provides this functionality for OpenCV transformations. I unfortunately need this for scipy
's implementation.
Much too late, after repeatedly hitting a brick wall trying to translate the above question's answer to scipy
, I came across this issue and subsequently followed to this question. The latter question did give some insight into the wonderful world of scipy
's affine transformation, but I have as yet been unable to crack my particular needs.
The transformations from src
to dst
can have translations and rotation. I can get translations only working (an example is shown below) and I can get rotations only working (largely hacking around the below and taking inspiration from the use of the reshape
argument in scipy.ndimage.interpolation.rotate
). However, I am getting thoroughly lost combining the two. I have tried to calculate what should be the correct offset
(see this question's answers again), but I can't get it working in all scenarios.
Translation-only working example of padded affine transformation, which follows largely this repo, explained in this answer:
...ANSWER
Answered 2022-Mar-22 at 16:44If you have two images that are similar (or the same) and you want to align them, you can do it using both functions rotate and shift :
QUESTION
I'm currently using isort --profile=black --line-length=79
as a linter in my project for python files.
This produces the Vertical Hanging Indent (mode 3 in isort's documentation kind of output:
...ANSWER
Answered 2022-Mar-07 at 06:44You should use the --force-grid-wrap 2
flag in the CLI or set in the settings file like pyproject.toml
option force_grid_wrap = 2
. This would force isort to produce multiline output for 2 or more imports, regardless of line length. More info about this option
QUESTION
I have a little library where I can define integer types. These are intended for type-safe indexing into arrays and strings in the kind of algorithms I often write. For example, I can use it to define an offset type, Offset
and an index type, Idx
such that you can get an Offset
by subtracting two Idx
, you can get Idx
by adding or subtracting Offset
, but you cannot for example multiple or add Idx
.
ANSWER
Answered 2022-Feb-10 at 05:54No, you can't.
By definition of the orphan rules:
Given
impl Trait for T0
, animpl
is valid only if at least one of the following is true:
- Trait is a local trait
- All of
- At least one of the types
T0..=Tn
must be a local type. LetTi
be the first such type.- No uncovered type parameters
P1..=Pn
may appear inT0..Ti
(excludingTi
)Only the appearance of uncovered type parameters is restricted. Note that for the purposes of coherence, fundamental types are special. The T in Box is not considered covered, and Box is considered local.
Local traitA
trait
which was defined in the current crate. A trait definition is local or not independent of applied type arguments. Giventrait Foo
,Foo
is always local, regardless of the types substituted forT
andU
.
Local typeA
struct
,enum
, orunion
which was defined in the current crate. This is not affected by applied type arguments.struct Foo
is considered local, butVec
is not.LocalType
is local. Type aliases do not affect locality.
As neither Index
nor Range
nor Vec
are local, and Range
is not a fundamental type, you cannot impl Index<...>> for Vec
, no matter what you put in the place of the ...
.
The reason for these rules is that nothing prevents Range
or Vec
from implementing impl Index> for Vec
. Such impl does not exist, and probably never will, but the rules are the same among all types, and in the general case this definitely can happen.
You cannot overload the range operator either - it always creates a Range
(or RangeInclusive
, RangeFull
, etc.).
The only solution I can think about is to create a newtype wrapper for Vec
, as suggested in the comments.
If you want your vector to return a wrapped slice, you can use a bit of unsafe code:
QUESTION
I am not a coder by trade, but am working on hacking together an image carousel for our website. I've gotten everything to work except for this last weird problem I am having with spacing. In the attached image, you'll see there is too much spacing between the screenshot and the next-image button to the right of it.
Here is the code (apologies in advance, it is truly terrible):
...ANSWER
Answered 2022-Feb-01 at 19:44Replacing justify-content: space-between
with justify-content: center
in #p-10-s-i-s-image-container
will fix that.
QUESTION
I think the question is quite obvious. The I have tried so far:
...ANSWER
Answered 2022-Feb-01 at 12:18You can use std::bind_front
to bind this
to &test::member
and pass it to jthread
:
QUESTION
I want to change the background color of a SpTextInputFieldPresenter
e.g. to provide a visual feedback of the input, I want to react to whenTextChangedDo:
and change the background color of the field to show if the input is correct or wrong. I know this is not the best for everybody, but I still want to try it.
How can I do without hacking?
ANSWER
Answered 2022-Jan-28 at 14:01Spec previews the use of styles to change (up to a point) how a component looks.
Styles are added to an application (an instance of SpApplication
or child of it) and can be used by any presenter that is part of the application.
Styles can be seen as CSS stylesheets, and in the case of Gtk they actually are CSS stylesheets, but in the case of Morphic backend they have a complete different implementation (you can see all properties you can define in the SpPropertyStyle
hierarchy.
The following code will show how to
- declare styles (in a scripting way, in a production scenario styles would be likely defined in a configuration for the application).
- use them by adding or removing them.
QUESTION
Let's say I have the following Spark frame:
...ANSWER
Answered 2022-Jan-31 at 13:47Group by time window '1 day'
+ UserName
to count then group by window frame and pivot user names:
QUESTION
I have a playbook that performs some tasks on a GKE cluster. It works, but every now and again, the cluster will go into a "RECONCILING" state (we don't know why yet).
I want to add a task to wait for the cluster state to be in "RUNNING" before proceeding with the other tasks, in order to avoid tasks failing
This works:
...ANSWER
Answered 2022-Jan-29 at 11:28You've got it correct almost. The only thing is that the selectattr
and map
query is returning a list with 1 item, i.e.
QUESTION
Consider the following stream:
...ANSWER
Answered 2022-Jan-25 at 22:11If I understand the problem right, I would proceed like this.
First we isolate the source stream. Consider that we use the share
operator to make sure that the source$
stream is shared by the other Observables we are going to create later on starting from source$
.
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