Implementing PGP (Pretty Good Privacy) using Bouncy Castle Crypto APIs

I was just exploring the Java API's for encrypting and decrypting the file using PGP (Pretty Good Privacy), and I came across Bouncy Castle Crypto APIs. Here we will simply see how to use the Bouncy Castle APIs.

 Firstly download the cypto jar from the bouncy castle site, you can find the links in the end.

 1.       Extract the Jar “crypto-145” at  
2.    The java classes are at location “.crypto-145\src\org\bouncycastle\openpgp\examples”

Use the jar’s at “crypto-145\jars” as per your SDK:-

I have used bcpg-jdk16-145.jar and bcprov-jdk16-145.jar

You need to first compile the JAVA classes.

Lets create the public and private key:-

1. We will use  RSAKeyPairGenerator.java java class to generate the key’s
     
 java org.bouncycastle.openpgp.examples.RSAKeyPairGenerator charlie "open sesame"
   ---where
           -- Charlie is identity 
       -- “open sesame” is passName
Example:
java -cp "D:\pgp\crypto-145\crypto-145\jars\bcpg-jdk16-145.jar";"D:\pgp\crypto-145\crypto-145\jars\bcprov-jdk16-145.jar";. RSAKeyPairGenerator systemA "A"


The public and private keys will appear as pub.bpg, and secret.bpg


To Encrypt the message in file:


1. Create  public and private key using above steps.
2. You can use KeyBasedFileProcessor.java to encrypt and decrypt 
3. Use following command:-
4. java -cp "D:\pgp\crypto-145\crypto-145\jars\bcpg-jdk16-145.jar";"D:\pgp\crypto-145\crypto-145\jars\bcprov-jdk16-145.jar";. KeyBasedFileProcessor -e msg.txt .\publickeys\SystemA\pub.bpg
5. –e for encryption
6. Msg.txt-file to be encrypted 
7. Pub.bpg-public key

To Decrypt the encrypted msg:-

1. java -cp "D:\pgp\crypto-145\crypto-145\jars\bcpg-jdk16-145.jar";"D:\pgp\crypto-145\crypto-145\jars\bcprov-jdk16-145.jar";. KeyBasedFileProcessor -d msg.txt.bpg .\SystemA\secret.bpg "A"
2. –d for decrypt
3. msg.txt.bpg-encrypted file
4. secret.bpg- private key
5. “A”- passName used while creating Keys

Refer Following Links for more details:-


Popular posts from this blog

JAVA embedding in Oracle SOA 12c

Image
In this post we will explore how to EMBED Java or call Java API from Oracle SOA BPEL process. In order to demonstrated this, I have created a simple JAVA project with 3 classes. 1.        Account.java -> This class represent Account DTO       2.       Party.java -> This class represent a party (customer) DTO       3.       GetNumber.java -> This class contains the method that takes Party DTO as input and apply some business logic and return party’s AccountDTO in response. public Account getNumber(Party party) The above classes are created to simulate the calling of actual business logic API’s. Account.java Party.java GetNumber.java public class Account {     public Account() {         super();     }     String account;     public void setAccount(String account) {         this.account = account;     }     public String getAccount() {         return account;     } } public class Party {     public Part
Read more

Passing/Receiving HTTP header in SOA BPEL

Image
In this example we will explore how to pass or receive the parameters from HTTP header. We will explore below two scenarios, To receive the HTTP header from SOAP request. To pass the HTTP header while calling soap service. SOA version used: 12.1.3c To receive the HTTP header from SOAP request: First we need to add the property “oracle.webservices.http.headers” under binding.ws in Service element in composite.xml. This property contains the comma separated parameters that we are expecting in request. Example,  ENV,VERSION. <binding.ws port="http://xmlns.oracle.com/SOA_Learning/HTTPHeader/HTTPHeaderTest#wsdl.endpoint(httpheadertest_client_ep/HTTPHeaderTest_pt)">          <property name="oracle.webservices.http.headers">ENV,VERSION</property> </binding.ws> Now in BPEL source under receive activity, we need add <fromProperties> element which will copy the parameters from HTTP header to BPEL variable.
Read more

Integrating Weblogic with IBM MQ over JMS

Image
We can integrate weblogic with IBM MQ over JMS by creating Foreign JMS server with Links in weblogic server. We need to create .binding file which will acts as file based JNDI provider to create JMS binding to MQ resources. Will first explain how to create .binding file and then will configure weblogic to use the same. Steps to create .binding file: Firstly we need to add below jar’s in CLASSPATH jms.jar com.ibm.mq.jar com.ibm.mqjms.jar jta.jar connector.jar jndi.jar providerutil.jar fscontext.jar Create JMSProperties.config file with below properties INITIAL_CONTEXT_FACTORY=com.sun.jndi.fscontext.RefFSContextFactory PROVIDER_URL=file:/tmp/mqm/jndi SECURITY_AUTHENTICATION=none Run below command ./JMSAdmin -v JMSProperties . config InitCtx> def qcf(ForeignCF) TRANSPORT(CLIENT) HOST(localhost) PORT(1414) CHANNEL(MQCHANNEL) QMGR(MQMRG) def q(MQ1) qmgr(MQMRG) queue(MQ1) def q(MQR1) qmgr(MQMRG) queue(MQR1) display ctx
Read more