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Challenge #19 - CSAW CTF Crypto #1

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11-08-2011, 08:49 PM #11
Morpheus
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Posts: 228 Threads:44 Joined: Sep 2011 Reputation: 5

RE: Challenge #19 - CSAW CTF Crypto #1
Hi clifford

Nice work!


Great coders aren't born. They're compiled and released.
Expert coders do not need a keyboard. They just throw magnets at the RAM chips.

11-08-2011, 11:28 PM #12
Posts: 228 Threads:18 Joined: Jul 2011 Reputation: 9

RE: Challenge #19 - CSAW CTF Crypto #1
Beginners luck :) :)


Question of the day; How many smilies do I need to add to achieve the 25 character post requirement? LOL

11-09-2011, 01:04 AM #13
Holmes.Sherlock
Senior Member
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Posts: 370 Threads:46 Joined: Oct 2011 Reputation: 7

RE: Challenge #19 - CSAW CTF Crypto #1
(11-08-2011, 11:52 AM)clifford_cooley Wrote:  WooHoo, Another one bites the dust. :)


I don't know why I'm not getting mail notification for all the replies on this thread. So, I'm a bit late to congratulate you. Both Thumbs Up


(11-08-2011, 11:28 PM)clifford_cooley Wrote:  Beginners luck :) :)


Too much moved with 'Paulo Coelho' or 'The Alchemist' ?


This post was last modified: 11-09-2011, 01:06 AM by Holmes.Sherlock.

11-09-2011, 02:26 AM #14
AceInfinity
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Posts: 9,733 Threads:1,026 Joined: Jun 2011 Reputation: 76

RE: Challenge #19 - CSAW CTF Crypto #1
I created a powershell script to solve this.

Here's my output:
Quote:[Current Directory: C:\Users\Infinity\Desktop]
Input: file.txt
------------------------------------------------------
Welcome to the 2011 NYU Poly CSAW CTF event. We have planned many challenges for you and we hope you have fun solving them all. The key for this challenge is cryptography.

The file I get the contents of:
Code:
87
101
108
99
111
109
101
32
116
111
32
116
104
101
32
50
48
49
49
32
78
89
85
32
80
111
108
121
32
67
83
65
87
32
67
84
70
32
101
118
101
110
116
46
32
87
101
32
104
97
118
101
32
112
108
97
110
110
101
100
32
109
97
110
121
32
99
104
97
108
108
101
110
103
101
115
32
102
111
114
32
121
111
117
32
97
110
100
32
119
101
32
104
111
112
101
32
121
111
117
32
104
97
118
101
32
102
117
110
32
115
111
108
118
105
110
103
32
116
104
101
109
32
97
108
108
46
32
84
104
101
32
107
101
121
32
102
111
114
32
116
104
105
115
32
99
104
97
108
108
101
110
103
101
32
105
115
32
99
114
121
112
116
111
103
114
97
112
104
121
46

And my powershell script:
Code:
$path = read-host "Enter a path to a file"
$cd = [IO.Directory]::GetCurrentDirectory()
"[Current Directory: $cd]" > ".\output.txt"
"Input: $path" >> ".\output.txt"
"------------------------------------------------------" >> ".\output.txt"

Get-Content $path | %{
    $data = $_.split([char]0x0010);
    $output += [char][int]"$($data[0])"
}

$output >> ".\output.txt"
This post was last modified: 11-09-2011, 02:28 AM by AceInfinity.


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

Development Site: aceinfinity.net

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