Base Emoji

Ben Craton — Fri, 03 Mar 2017 00:00:00 +0000

What is it?</h2>
A silly project to learn unicode, baseEmoji</a> is a base1024 encoding scheme that uses emoji as its lookup table. The primary purpose is to represent otherwise ugly data in more “pleasing” form in social media.</p>

The impetus for this module was to represent digital signatures in social media in a less obtrusive way. A signature on a tweet from a user to a bot is useful in alerting the bot to run commands that can be trusted to have come from a specific source. However, these signatures look like jibberish to human readers. Instead, this signature could be represented by emoji using baseEmoji and appear to a human reader like a typical Instagram user.</p>

“Practical” Example: Signing a Tweet</h3>

Signing</h4>

</span>
import</span> sys</span></span>
import</span> tweepy</span></span>
import</span> baseEmoji</span></span>
from</span> ecdsa</span> import</span> SigningKey</span></span>
</span>
CONSUMER_KEY</span> =</span> '********'</span></span>
CONSUMER_SECRET</span> =</span> '********'</span></span>
ACCESS_KEY</span> =</span> '********'</span></span>
ACCESS_SECRET</span> =</span> '********'</span></span>
</span>
#set up tweepy and connect to Twitter</span></span>
auth</span> =</span> tweepy</span>.</span>OAuthHandler</span>(</span>CONSUMER_KEY</span>,</span> CONSUMER_SECRET</span>)</span></span>
auth</span>.</span>set_access_token</span>(</span>ACCESS_KEY</span>,</span> ACCESS_SECRET</span>)</span></span>
api</span> =</span> tweepy</span>.</span>API</span>(</span>auth</span>)</span></span>
</span>
#create a signing key. In practice this would be saved</span></span>
signKey</span> =</span> SigningKey</span>.</span>generate</span>()</span></span>
</span>
#our message</span></span>
message</span> =</span> "This tweet is signed"</span></span>
</span>
#sign the message</span></span>
signature</span> =</span> signKey</span>.</span>sign</span>(</span>message</span>)</span></span>
</span>
#convert the signature into an emoji signature</span></span>
emSig</span> =</span> baseEmoji</span>.</span>encodeStr</span>(</span>signature</span>,</span>" "</span>)</span></span>
</span>
#create the tweet with a delimiter for later parsing</span></span>
tweet</span> =</span> message</span> +</span> " #blessed "</span> +</span> emSig</span></span>
</span>
#send the tweet</span></span>
t</span> =</span> api</span>.</span>update_status</span>(</span>tweet</span>)</span></span>
</span>
#...</span></span></code></pre>Viewing</h4>
</p>
Verifying</h4>
#...</span></span>
#get the verification key</span></span>
verifyKey</span> =</span> signKey</span>.</span>get_verifying_key</span>()</span></span>
</span>
#retrieve a tweet (in this case the tweet we just sent)</span></span>
v</span> =</span> api</span>.</span>get_status</span>(</span>t</span>.</span>id</span>)</span></span>
</span>
#split the text of the tweet into the message and the signature</span></span>
(</span>rmessage</span>,</span>remSig</span>)</span> =</span> v</span>.</span>text</span>.</span>split</span>(</span>" #blessed "</span>,</span>1</span>)</span></span>
</span>
#convert the emoji signature back to its original form</span></span>
rsignature</span> =</span> baseEmoji</span>.</span>decodeStr</span>(</span>remSig</span>,</span>" "</span>)</span></span>
</span>
#verify that the signature is valid for the message</span></span>
assert</span> verifyKey</span>.</span>verify</span>(</span>rsignature</span>,</span> rmessage</span>)</span></span></code></pre>
In the wild, it may be advantageous to use a smaller digital signature algorithm and to also check that the length of the message plus the delimiter and signature don’t go beyond 140 characters. While the signature itself can be a fixed size of bytes, because some emoji require more than one code point, the emoji signature could be a few characters longer according to Twitter’s counting.</p>

FalseBlue - encoding

Base Emoji

What is it?</h2> A silly project to learn unicode, baseEmoji</a> is a base1024 encoding scheme that uses emoji as its lookup table. The primary purpose is to represent otherwise ugly data in more “pleasing” form in social media.</p>

“Practical” Example: Signing a Tweet</h3>

Viewing</h4> </p>

What is it?</h2>
A silly project to learn unicode, baseEmoji</a> is a base1024 encoding scheme that uses emoji as its lookup table. The primary purpose is to represent otherwise ugly data in more “pleasing” form in social media.</p>

Viewing</h4>
</p>