PHP - Aes-256-cbc Encrypt Decrypt with IV vector

function encrypt_decrypt($action, $string) {
    $output = false;
    $encrypt_method = "aes-256-cbc";
    $secret_key = 'abcdefghi1234567890';
    $secret_iv = '';
 
// hash
    $key = hash('sha256', $secret_key);
    echo "

".$key;

    // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
    $iv = substr(hash('sha256', $secret_iv), 0, 16);
    if ( $action == 'encrypt' ) {
        $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
        $output = base64_encode($output);
    } else if( $action == 'decrypt' ) {
        $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
    }
    return $output;
}
$plain_txt = "I am vijay";
echo "

Plain Text =" .$plain_txt. "\n";
$encrypted_txt = encrypt_decrypt('encrypt', $plain_txt);
echo "

Encrypted Text = " .$encrypted_txt. "\n";

$decrypted_txt = encrypt_decrypt('decrypt', $encrypted_txt);
echo "

Decrypted Text =" .$decrypted_txt. "\n";

if ( $plain_txt === $decrypted_txt ) echo "

SUCCESS";
else echo "

FAILED";
echo "\n";

?>



Output

Plain Text =I am vijay

681448fb66d8704c7d52f6770f6087882db21c899fe48d21012a587bbe70cdd3

Encrypted Text = THRtUkJYWFUzb1NzUFRoOUw5T3Q2UT09

681448fb66d8704c7d52f6770f6087882db21c899fe48d21012a587bbe70cdd3

Decrypted Text =I am vijay

SUCCESS

PHP - Encrypt / Decrypt with out IV Vector with AES-256-CBC

const PASSWORD = 'abcdefghi1234567890';
const CIPHER_METHOD = 'AES-256-CBC';

function encrypt($str) {
    $val = openssl_encrypt($str, CIPHER_METHOD, hash('sha256', PASSWORD, true));
    return $val;    
}

function decrypt($str) {
   return openssl_decrypt($str, CIPHER_METHOD, hash('sha256', PASSWORD, true));
}

$plain_data = 'I am vijay';

$encrypted = encrypt($plain_data);
echo "Encrypted : ".$encrypted."

";

$decrypted = decrypt($encrypted);
echo "Decrypted : ".$decrypted."

";

?>


Output

: openssl_encrypt(): Using an empty Initialization Vector (iv) is potentially insecure and not recommended in D:\php\test.php >

Encrypted : zmuNrqZ+GwtQC5B0riJoMw==

Decrypted : I am vijay

Cassandra to connect from remote

#comment the below keys
#listen_address

#change to your ip
seeds
rpc_address

#uncomment the below keys and add ur ip
broadcast_address
broadcast_rpc_address

#restart cassandra


note: you should not give any space in front of each keys..


in your command prompt, 

cqlsh 
or
cqlsh 

Error: The server encountered an error processing the request. See server logs for more details

This issue comes into picture whenever there is any issue at WCF service.
So see more details about the issue, you need to includeexceptiondetailInfaults attribute to true in servicedebug tag.

Go to your web.config

<servicebehaviors>
        <behavior name="myServiceBehavior">
          <servicedebug includeexceptiondetailinfaults="true" />
        </behavior>
</servicebehaviors>

Either you can also add class attribute to the service class.

Cassandra Group By clause in Select command

1. Go to C:\Program Files\DataStax-DDC\apache-cassandra\conf\cassandra.yaml
change false to true

enable_user_defined_functions: true


2. Paste below functions in cqlsh window

CREATE OR REPLACE FUNCTION state_group_and_count( state map, type text )
CALLED ON NULL INPUT
RETURNS map
LANGUAGE java AS '
Integer count = (Integer) state.get(type);  if (count == null) count = 1; else count++; state.put(type, count); return state; ' ;

CREATE OR REPLACE AGGREGATE group_and_count(text)
SFUNC state_group_and_count
STYPE map 
INITCOND {};


3. execute the query like below

--select group_and_count(column) from table;
-- ex
-- select group_and_count(item) from skutable;



4. you may see like this 
Failed to format value OrderedMapSerializedKey([(u'xxx', 4)]) : 'NoneType' object has no attribute 'sub_types'
this is a cqlsh error. so you can try from programming languages like java..., it may work perfectly.

Java UniRest to call POST Http/Https Protocols

add - unirest, httpasynclient, httpcore-nio jars

// to get https post

HttpResponse response = Unirest.post ( "https://www.infovijay.com/api/call" ).header ( "content-type", "application/json" ).header ( "cache-control", "no-cache" ).body ( "{\"id\":\"12345\",\"name\":\"vijay\"}\r\n" ).asString ();

System.out.println ( response.getStatus () );
System.out.println ( response.getStatusText () );
System.out.println ( response.getHeaders () );
System.out.println ( response.getBody () );



// to file download

HttpResponse is = Unirest.get ( "https://www.infovijay.com/api/file.pdf" ).asBinary ();
byte [] buffer = new byte[is.getRawBody ().available ()];
is.getRawBody ().read ( buffer );

File targetFile = new File ( "d:/abc.pdf" );
OutputStream outStream = new FileOutputStream ( targetFile );
outStream.write ( buffer );

Java HttpClient to call POST Http/Https Protocols

                String url = "https://www.infovijay.com/api/call";
                JSONObject json = new JSONObject ();
json.put ( "id", "123" );
json.put ( "name", "vijay" );
StringEntity params = new StringEntity ( json.toString () );

/*
* HttpClient httpClient = new DefaultHttpClient();
* HttpPost httpPost = new HttpPost(url);
* ResponseHandler responseHandler = new BasicResponseHandler();
* String responseBody = null;
* try {
* httpPost.setEntity(params);
* httpPost.setHeader("Content-type", "application/json");
* httpPost.setHeader("Cache-Control", "no-cache");
* responseBody = httpClient.execute(httpPost, responseHandler);
* } catch (IOException e) {
* throw e;
* } finally {
* httpClient.getConnectionManager().shutdown();
* }
* System.out.println ( responseBody );
*/


HttpPost post = null;
HttpClient httpClient = HttpClientBuilder.create ().build ();
HttpResponse httpResponse = null;
BufferedReader br = null;
String result = null;

try
{
StringEntity jsonParams = new StringEntity ( json.toString () );
post = new HttpPost ( url );
post.setEntity ( jsonParams );
post.setHeader ( "Content-type", "application/json" );
post.setHeader ( "Cache-Control", "no-cache" );
httpResponse = httpClient.execute ( post );

br = new BufferedReader ( new InputStreamReader ( httpResponse.getEntity ().getContent () ) );
result = br.readLine ();
}
catch ( Exception e )
{
e.printStackTrace ();
}
finally
{
try
{
httpResponse = null;
post = null;
httpClient = null;

if ( br != null )
{
br.close ();
}
}
catch ( IOException e )
{
e.printStackTrace ();
}
}
System.out.println( result );
}

NodeJs Access Form-Data Property Values

For recent version of NodeJs, You have to install multer plugin.

Package.json

{
  "name": "form-data-nodejs",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "dependencies": {
    "body-parser": "~1.15.1",
    "cookie-parser": "~1.4.3",
    "express": "~4.13.4",
    "multer": "^1.3.0"
  }
}

app.js

const express = require('express')

const app = express()

app.get('/', function (req, res) {

  res.send('Hello World!')

})

app.listen(3000, function () {

  console.log('Example app listening on port 3000!')

})

//let multer = require('multer');

//let upload = multer();

//if let gives error, use var

var multer = require('multer');

var upload = multer();

app.post('/send', upload.fields([]), (req, res) => {

  let formData = req.body;

  console.log('form data', formData.test);

  res.sendStatus(200);

});

>> node install --save

>> node app.js

https://github.com/expressjs/multer

Dynamic Web Module 3.0 requires Java 1.6 or newer” in Maven Projects

Open your project’s pom.xml and add this plugin tag

<build>     <plugins>         <plugin>         <groupId>org.apache.maven.plugins</groupId>         <artifactId>maven-compiler-plugin</artifactId>         <version>3.1</version>         <configuration>             <source>1.8</source>             <target>1.8</target>         </configuration>     </plugin>     </plugins> </build>

Finally, right click on your project > Maven > Update Project

Docker - Setup with Two Tomcat with Nginx / SFTP

imp commands
************
find / -name tomcat8


Oracle jdk 1.8
**************
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

#this will give all ip and other details
docker inspect


imp commands
+++++++++++++
docker run -it ubuntu
apt-get update
apt-get install vim
apt-get install net-tools
apt-get install python-software-properties
apt-get install software-properties-common
add-apt-repository ppa:webupd8team/java
apt-get update
apt-get install oracle-java8-installer
apt-get install -y net-tools
apt-get update
apt-get install tomcat7 vim
echo $JAVA_HOME
export JAVA_HOME=/usr/lib/jvm/java-8-oracle
vim /etc/default/tomcat7
# now ensure in tomcat7 file
# remove the comment
JAVA_HOME=/usr/lib/jvm/java-8-oracle
ifconfig
service tomcat7 start

wget localhost:8080

docker commit/push/pull
docker ps -a
docker commit
docker push drvijayy2k2/ubuntutomcat1
docker pull drvijayy2k2/ubuntutomcat1


to show all process - ps aux


Now instead of exiting the container, detach from it back to your terminal by typing:
ctrl-p then ctrl-q
(If you’re using gnu screen, remember it’s ctrl-a a ctrl-p, then ctrl-q)


uninstall
*********
sudo apt-get purge docker-engine
sudo apt-get autoremove --purge docker-engine

umount /var/lib/docker/overlay #check and remvoe all the containers
umount /var/lib/docker/overlay2

rm -rf /var/lib/docker # This deletes all images, containers, and volumes

dettach
ctrl + a + p + q

80, 8080,8081,8082, 8888 - opened for outside

tomcat1
docker run --name tomcat1 -p 8080:8080 -it drvijayy2k2/tomcat8
service tomcat8 start
wget localhost:8080
ctrl + a + p + q
browser - http://ip-1:8080/

you can change the root file
apt-get install vim
find / -name tomcat8
vi /var/lib/tomcat8/webapps/ROOT/index.html
vi /usr/share/tomcat8/startup.sh

tomcat2
docker run --name tomcat2 -p 8081:8080 -it drvijayy2k2/tomcat8
service tomcat8 start
wget localhost:8080
backgroun [ -d is not working] - ctrl + a + p + q
browser - http://ip-2:8081/


nginx
172.17.0.3
#sudo docker run --name docker-nginx -p 80:80 -d -v ~/docker-nginx/tml:/usr/share/nginx/html nginx

docker run --name ubuntu-nginx -it -p 80:80 drvijayy2k2/nginx
vi /etc/nginx/conf.d/default.conf
service nginx start
ctrl + a + p + q
browser http://ip-3
docker attach

#add host entry c:\windows\system32\drivers\etc\hosts
ip-3 docker.poc.com
open browser
http://docker.poc.com
#stop the tomcat to see or refersh, it will do the roundrobin by default

SFTP - ip-4
*******
docker run -it -p 8081:22 drvijayy2k2/sftp
service vsftpd start
service ssh start
ctrl + a p q

open winscp
type ur public ip ip-4
port 8081
user john
pwd test123

copy some files to www folder