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Challenge #27: Addition PPC

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08-13-2013, 06:10 AM #1
Icecube
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Challenge #27: Addition PPC
Addition PPC

nc 5.231.58.182 1338

Code:
$ nc 5.231.58.182 1338

Team Reboot challenge 27
------------------------

To get the flag, you need to solve 100 additions in a row.

Writing a script/program that connects via a socket to this
server, is the way to solve this challenge.


2 + 5 =

You can try your solution at: http://tech.reboot.pro/mybbchallenges/ch...allenge=27

Solved by:
1. AceInfinity
2. Florin
3. DarkPhoeniX
This post was last modified: 08-17-2013, 04:56 AM by AceInfinity.

08-13-2013, 07:40 PM #2
AceInfinity
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RE: Challenge #27: Addition PPC
lol, this would be too easy if I wrote a program to automate the answers for the sending. So I tried with my C++ program that I started for the Sudoku version, to solve it manually Laugh



I think I got to around ~25 before getting a "So sloooow!" message. I think this is more fun though than trying to solve the equations programmatically hahaha.
This post was last modified: 08-13-2013, 10:39 PM by AceInfinity.


Microsoft MVP .NET Programming - (2012 - Present)
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Development Site: aceinfinity.net

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08-13-2013, 09:11 PM #3
AceInfinity
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RE: Challenge #27: Addition PPC
Solved it :)

Flag: cc15cd88caa389d42d2511b1b15e98fd6099e133f753f41b281fda1ea85b44cf [SHA-256]



I realized I probably wasn't going to solve it manually as the numbers get larger haha.

edit: For some reason that Challenges vault won't let me submit the answer though. I know this is the correct answer (it's obvious once you get the flag, what the flag is), but it still says "Sorry Try again".

To solve this challenge, or not to solve it :) Let's see who else can do this one lol. It's simple though, but I enjoyed it. I did it in C++, I think there might be some answers utilizing Python, C#, and VB.net though if certain people solve it.
This post was last modified: 08-13-2013, 09:17 PM by AceInfinity.


Microsoft MVP .NET Programming - (2012 - Present)
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Development Site: aceinfinity.net

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08-14-2013, 12:37 AM #4
Florin
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Posts: 456 Threads:71 Joined: Dec 2011 Reputation: 14

RE: Challenge #27: Addition PPC
Hmm ...

I think this challenge might be more complex, since I didn't succeed to validate my flag.

Code:
print hashlib.sha1(flag).hexdigest()
814d75b76a0337e704ec3d12af8a6d87c40a368f

Earlier, or yesterday:
Code:
print hashlib.sha1(flag).hexdigest()
6120a50356e7cd7bc7413e100a505da06f01545b

Two versions of a flag or the flag has changed?

08-14-2013, 12:48 AM #5
AceInfinity
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RE: Challenge #27: Addition PPC
(08-14-2013, 12:37 AM)Florin Wrote:  Hmm ...

I think this challenge might be more complex, since I didn't succeed to validate my flag.

Code:
print hashlib.sha1(flag).hexdigest()
814d75b76a0337e704ec3d12af8a6d87c40a368f

Earlier, or yesterday:
Code:
print hashlib.sha1(flag).hexdigest()
6120a50356e7cd7bc7413e100a505da06f01545b

Two versions of a flag or the flag has changed?

I think that may be an issue with the challenge vault though and not that you don't have the correct answer. I'd have to check with IceCube to be sure that I have the correct answer... But i'm sure you got it as well.

TLF is still recovering from the Apache issues effecting all of Reboot. Perhaps IceCube can provide a hash of the flag so we can verify our answers? Unsure
This post was last modified: 08-14-2013, 12:50 AM by AceInfinity.


Microsoft MVP .NET Programming - (2012 - Present)
®Crestron DMC-T Certified Automation Programmer

Development Site: aceinfinity.net

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08-14-2013, 02:24 AM #6
Icecube
Team Reboot
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Posts: 34 Threads:2 Joined: Jan 2012 Reputation: 5

RE: Challenge #27: Addition PPC
Yeah there are problems with the challenge flag submission. KoBE is trying to resolve the issue.
If you solved 100 additions correctly, you have the right flag.

@ Florin
The flag changed indeed because I realised that "additions" is more correct English than "summations".

Code:
md5sum
d1497c0dca8d71efc52f0b6d48e95534

sha1sum:
814d75b76a0337e704ec3d12af8a6d87c40a368f

sha256sum:
cc15cd88caa389d42d2511b1b15e98fd6099e133f753f41b281fda1ea85b44cf

Good to see that this challenge was solved quickly.
This post was last modified: 08-14-2013, 02:44 AM by Icecube.

08-16-2013, 11:37 PM #7
Holmes.Sherlock
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RE: Challenge #27: Addition PPC
Portal is still not recording the solvers' names. Add DP, too, to the list of solvers.

08-17-2013, 01:11 AM #8
AceInfinity
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RE: Challenge #27: Addition PPC
(08-16-2013, 11:37 PM)Holmes.Sherlock Wrote:  Portal is still not recording the solvers' names. Add DP, too, to the list of solvers.

Who is DP? I thought it was only florin and myself that solved this as no one else posted about getting the solution. Confused

I can't find this one on Reboot either, only the Sudoku one...
This post was last modified: 08-17-2013, 01:12 AM by AceInfinity.


Microsoft MVP .NET Programming - (2012 - Present)
®Crestron DMC-T Certified Automation Programmer

Development Site: aceinfinity.net

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08-17-2013, 01:18 AM #9
Holmes.Sherlock
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RE: Challenge #27: Addition PPC
(08-17-2013, 01:11 AM)AceInfinity Wrote:  
(08-16-2013, 11:37 PM)Holmes.Sherlock Wrote:  Portal is still not recording the solvers' names. Add DP, too, to the list of solvers.

Who is DP? I thought it was only florin and myself that solved this as no one else posted about getting the solution. Confused

I can't find this one on Reboot either, only the Sudoku one...

DarkPhoeniX.

http://reboot.pro/topic/18786-challenge-...ntry175883

08-17-2013, 04:56 AM #10
AceInfinity
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RE: Challenge #27: Addition PPC
Okay, I added him, hope IceCube doesn't mind (I saved him a bit of time anyways cheers).


Microsoft MVP .NET Programming - (2012 - Present)
®Crestron DMC-T Certified Automation Programmer

Development Site: aceinfinity.net

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