ardinusawan

 import java.lang.reflect.UndeclaredThrowableException;
 import java.security.GeneralSecurityException;
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
 import java.math.BigInteger;
 import java.util.TimeZone;

ardinusawan

# http://pandas.pydata.org/pandas-docs/stable/merging.html
# Search on 'Brief primer on merge methods (relational algebra)'
import pandas as pd

csv_input = pd.read_csv('./file_A.csv')
df = pd.DataFrame(csv_input)
csv_input2 = pd.read_csv('./file_B.csv')
df2 = pd.DataFrame(csv_input2)
combined = pd.merge(csv_input, csv_input2, on='Primary Key')
combined.to_csv('output.csv', index=False)

ardinusawan

# https://www.hackerrank.com/contests/capture-the-flag/challenges/secret-key/copy-from/1301466914
from urllib import urlopen
import json
import ast
url = urlopen('https://cdn.hackerrank.com/hackerrank/static/contests/capture-the-flag/secret/key.json').read().decode('utf8')
result = json.dumps(json.loads(url))
result = ast.literal_eval(result)

i = 0
data = list()

ardinusawan

for pdfile in *.pdf ; do
  convert -verbose -density 500 "${pdfile}" -quality 100 "${pdfile%.*}".png
  # rm "${pdfile}"
done

ardinusawan

[Unit]
Description=Auto SSH Service
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=pi
WorkingDirectory=/home/pi/autossh
ExecStart=/home/pi/autossh/script.sh

ardinusawan

JWS & JWT using JOSE

How

1. npm i jose

JWE using alg dir and A128GCM enc

node jwe.js

JWS using alg EdDSA and ed25519 enc