kevin-wang-cy

kevin-wang-cy / testgist

Created October 12, 2017 03:56

test gist

this is the gist content

kevin-wang-cy / remove_git_tag

Created August 6, 2017 16:26 — forked from dearaujoj/remove_git_tag

git remove tag locally and remote

git tag -d TagName && git push origin :refs/tags/TagName

kevin-wang-cy / Compile_Bitcoin_on_Ubuntu_16_04_2

Last active August 5, 2017 12:48 — forked from kostaz/Compile_Bitcoin_on_Ubuntu_14_04

Compile Bitcoin on Ubuntu 16.04.2

	(a revise version basing on Kosta's )

	Assuming the username of the Ubuntu user is "theusername".

	Preparation
	-----------
	Make sure xenial-updates repository in your apt-get source list:

	```
	deb http://us.archive.ubuntu.com/ubuntu/ xenial-updates main restircted universe multiverse

kevin-wang-cy / Simple Java keytool key pair and trust store

Created March 11, 2017 06:47

OpenSSL and Java import/export

	Create self signed key pair and add to new key store:
	keytool -genkey -alias mykey -keyalg RSA -keystore keystore.jks -keysize 2048

	Export public key and import into new trust store:
	keytool -keystore keystore.jks -export -alias mykey -file my.cer
	keytool -import -alias mypub -file my.cer -keystore truststore.jks

	(Alternate way) Manually import certificate from HTTPS server to trust store:
	Firefox: Add Exception -> Get Certificat -> View -> Details -> Export as "a.der"
	keytool -importcert -keystore truststore.jks -file a.der

kevin-wang-cy / RsaExample.java

Created March 9, 2017 11:42 — forked from nielsutrecht/RsaExample.java

Example of RSA generation, sign, verify, encryption, decryption and keystores in Java

	import javax.crypto.Cipher;
	import java.io.InputStream;
	import java.security.*;
	import java.util.Base64;

	import static java.nio.charset.StandardCharsets.UTF_8;

	public class RsaExample {
	public static KeyPair generateKeyPair() throws Exception {
	KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");