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@franzwarning
franzwarning / !Java Python JS AES CBC Encryption and Decryption Examples.md
Last active August 19, 2024 09:36
Java, Python, and Javascript Encryption/Decryption with AES/CBC/PKCS5PADDING

Had some trouble in the past with equivalent encryption/decryption across these three languages so figured I'd share my findings.

Note: I'm aware the IV you choose shouldn't be static, but for this example it saved some string manipulation code. What I've seen people do is attach the IV to the front of the encrypted string (first 16 characters), then substring when you are decryption.

Would love to hear your thoughts / comments!

@martinhynar
martinhynar / zookeeper.service
Created June 2, 2017 10:56
ZooKeeper SystemD Service Unit File
[Unit]
Description=ZooKeeper Service
Documentation=http://zookeeper.apache.org
Requires=network.target
After=network.target
[Service]
Type=forking
User=zookeeper
Group=zookeeper
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="test" transaction-type="RESOURCE_LOCAL">
<class>com.test.jpa.Student</class>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
@gambtho
gambtho / gist:36a2f01e9e7d8c1b0046fb074f1a44ee
Last active August 25, 2021 12:45
Zookeeper.service systemd script for zookeeper
from - http://davidssysadminnotes.blogspot.com/2016/01/installing-apache-kafka-and-zookeeper.html
[smack1]# vi /etc/systemd/system/kafka-zookeeper.service
[Unit]
Description=Apache Zookeeper server (Kafka)
Documentation=http://zookeeper.apache.org
Requires=network.target remote-fs.target
After=network.target remote-fs.target
[Service]
Type=simple
@ygotthilf
ygotthilf / jwtRS256.sh
Last active October 29, 2025 15:38
How to generate JWT RS256 key
ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub
@myusuf3
myusuf3 / delete_git_submodule.md
Created November 3, 2014 17:36
How effectively delete a git submodule.

To remove a submodule you need to:

  • Delete the relevant section from the .gitmodules file.
  • Stage the .gitmodules changes git add .gitmodules
  • Delete the relevant section from .git/config.
  • Run git rm --cached path_to_submodule (no trailing slash).
  • Run rm -rf .git/modules/path_to_submodule (no trailing slash).
  • Commit git commit -m "Removed submodule "
  • Delete the now untracked submodule files rm -rf path_to_submodule
@mychaelstyle
mychaelstyle / build.gradle
Created March 28, 2014 06:04
Example Gradle build Java with FindBugs and PMD and CPD
apply plugin: "java"
apply plugin: "eclipse"
apply plugin: "maven"
apply plugin: "findbugs"
apply plugin: "pmd"
def defaultEncoding = 'UTF-8'
[compileJava, compileTestJava]*.options*.encoding = defaultEncoding
sourceCompatibility = 1.7