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update steg readme
master
unknown 2015-10-09 14:57:03 -07:00
parent f924170032
commit 347fe14551
6 changed files with 107 additions and 5 deletions
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8
CheatingDesertRalley/README.md Normal file
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CheatingDesertRally
===================
http://www.y8.com/games/desert_rally
<p align="center">
<img src="https://github.com/voussoir/else/blob/master/CheatingDesertRalley/cdr.png?raw=true" alt="cheating desert rally"/>
</p>

3
CheatingDesertRalley/cdr.png Normal file
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version https://git-lfs.github.com/spec/v1
oid sha256:af834461d8b9efbac051ff90c7784b866bf050b3bb7e09c777157b3667c5ff6f
size 210404

40
CheatingDesertRalley/cdr.py Normal file
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import requests
import time as timem
import random
URL = 'http://www.uf3k.com/games/safarirally/record.php'
HEADERS = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36',
'Host': 'www.uf3k.com',
'Referer': 'http://media-ak.y8.com/system/contents/4531/original/desertrally.swf',
'X-Requested-With': 'ShockwaveFlash/19.0.0.185',
'Accept': '*/*',
'Accept-Encoding': 'gzip, deflate',
'Accept-Language': 'en-US;en;q=0.8',
'Connection': 'keep-alive',
}
def make_run(name, distance, avg_speed=None, top_speed=None, time=None, course=1, vehicle=None):
if avg_speed is None:
avg_speed = round(random.randint(20, 25) + random.triangular(), 4)
if top_speed is None:
top_speed = random.randint(140, 170)
if time is None:
time = round(distance * avg_speed * TIME_MULT, 4)
if vehicle is None:
vehicle = random.randint(0, 4)
params = {'cachebuster': int(timem.time() * 1000)}
data = {
'long_name': 'ultraflash3000',
'avg_speed': avg_speed,
'top_speed': top_speed,
'time': time,
'distance': distance,
'course': course,
'vehicle': vehicle,
'name': name
}
request = requests.Request('POST', url=URL, params=params, data=data)
session = requests.Session()
return session.send(request.prepare())
TIME_MULT = 0.0008128971962616823

51
Steganographic/README.md
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@ -3,6 +3,57 @@ Steganographic
Let's be honest, this was really just an excuse to make big Terminal headers out of hashmarks.
&nbsp;
Requires `pip install pillow`
&nbsp;
Hide files in images!
For each color channel of each pixel in an Image, modify the least significant bit to represent a bit of the Secret file.
This changes the RGB value of the pixel by a usually-imperceptible amount.
The first 32 bits (10.66 pixels) will be used to store the length of the Secret content in big endian.
Then, the Secret's extension is stored. A null byte indicates the end of the extension. This section is of variable length.
A file with no extension requires only that null byte. A file with an extension requires 1 additional byte per character.
Smallest image possible = 16 pixels with 48 bit secret: 32 for header; 8 for null extension; 8 for data.
Each Image pixel holds 3 Secret bits, so the Image must have at least `((secretbytes * (8 / 3)) + 14)` pixels.
An Image can hold `((3 * (pixels - 14)) / 8)` Secret bytes.
Usage:
> steganographic.py encode imagefilename.png secretfilename.ext
> steganographic.py decode lacedimagename.png
Reference table for files with NO EXTENSION.
For each extension character, subtract 1 byte from secret size
pixels | example dimensions | Secret file size
100 | 10 x 10 | 32 bytes
400 | 20 x 20 | 144 bytes
2,500 | 50 x 50 | 932 bytes
10,000 | 100 x 100 | 3,744 bytes
40,000 | 200 x 200 | 14,994 bytes
25,000 | 500 x 500 | 93,744 bytes (91 kb)
1,000,000 | 1,000 x 1,000 | 374,994 bytes (366 kb)
4,000,000 | 2,000 x 2,000 | 1,499,994 bytes (1.43 mb)
25,000,000 | 5,000 x 5,000 | 9,374,994 bytes (8.94 mb)
100,000,000 | 10,000 x 10,000 | 37,499,994 bytes (35.7 mb)
pixels | example dimensions | Secret file size
100 | 10 x 10 | 32 bytes
697 | 25 x 28 (700) | 256 bytes
2,745 | 50 x 55 (2,750) | 1,024 bytes (1 kb)
21,860 | 142 x 154 (21,868) | 8,192 bytes (8 kb)
87,396 | 230 x 380 (87,400) | 32,768 bytes (32 kb)
349,540 | 463 x 755 (349,565) | 131,072 bytes (128 kb)
1,398,116 | 1146 x 1120 (1,398,120) | 524,288 bytes (512 kb)
2,796,217 | 1621 x 1725 (2,796,225) | 1,048,576 bytes (1 mb)
11,184,825 | 3500 x 3200 (11,200,000) | 4,194,304 bytes (4 mb)
44,739,257 | 6700 x 6700 (44,890,000) | 16,777,216 bytes (16 mb)
89,478,500 | 9500 x 9500 (90,250,000) | 33,554,432 bytes (32 mb)
<p align="center">
<img src="https://github.com/voussoir/else/blob/master/.GitImages/steganographic_logo.png?raw=true" alt="steganographic"/>
</p>

2
Steganographic/steg_test.py
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@ -28,4 +28,4 @@ def decode(i):
#decode('examples\\steg_trespassing (3bp_thats_advertising_mp4).png')
encode('examples\\trespassing.png', 'examples\\thats_advertising.mp4')
decode('examples\\trespassing (thats_advertising_mp4).png')
#decode('examples\\trespassing (thats_advertising_mp4).png')

8
Steganographic/steganographic.py
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@ -5,13 +5,13 @@ The first 32 bits (10.66 pixels) will be used to store the length of the Secret
Then, the Secret's extension is stored. A null byte indicates the end of the extension. This section is of variable length.
A file with no extension requires only that null byte. A file with an extension requires 1 additional byte per character.
Smallest image possible = 16 pixels with 48 bit secret: 32 for header; 8 for null extension; 8 for data
Each Image pixel holds 3 Secret bits, so the Image must have at least ((secretbytes * (8 / 3)) + 14) pixels
Smallest image possible = 16 pixels with 48 bit secret: 32 for header; 8 for null extension; 8 for data.
Each Image pixel holds 3 Secret bits, so the Image must have at least ((secretbytes * (8 / 3)) + 14) pixels.
An Image can hold ((3 * (pixels - 14)) / 8) Secret bytes.
Usage:
> 3bitspixel.py encode imagefilename.png secretfilename.ext
> 3bitspixel.py decode lacedimagename.png
> steganographic.py encode imagefilename.png secretfilename.ext
> steganographic.py decode lacedimagename.png
Reference table for files with NO EXTENSION.