es.rediris.crypt
Class RSATool

java.lang.Object
  es.rediris.crypt.RSATool

public class RSATool
extends Object

RSATool is a helper class for encrypting/decrypting messages using RSA algorithm in ECB mode. Also, it uses PKCS1 padding when makes its operations with messages.
Keys are in PEM (PKCS#8) format, so you need to include the Bouncy Castle Library.

Constructor Summary

RSATool()
Generate an RSATool object, adding the Bouncy Castle Provider

Method Summary

String	decode(String data)
String	encode(String data) Encrypt a message using the private key
Key	getRsaPrivateKey() Get the private key, which has should been previously read
PublicKey	getRsaPublicKey() Get the public key, which has should been previously read
void	readRsaPrivateKeyPEM(String filename) Read a private key file in PEM PKCS 8 format.
void	readRsaPublicKeyPEM(String filename) Read a public key file in PEM PKCS 8 format.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RSATool

public RSATool()

Generate an RSATool object, adding the Bouncy Castle Provider

Method Detail

getRsaPrivateKey

public Key getRsaPrivateKey()

Get the private key, which has should been previously read

Returns:

The private key, or null if it hasn't read before

readRsaPrivateKeyPEM

public void readRsaPrivateKeyPEM(String filename)
                          throws IOException

Read a private key file in PEM PKCS 8 format. The file should be like:

 -----BEGIN RSA PRIVATE KEY-----
 ...
 -----END RSA PRIVATE KEY-----
 

Parameters:

filename - The name of the file

Throws:

IOException

getRsaPublicKey

public PublicKey getRsaPublicKey()

Get the public key, which has should been previously read

Returns:

The public key, or null if it hasn't read before

readRsaPublicKeyPEM

public void readRsaPublicKeyPEM(String filename)
                         throws IOException

Read a public key file in PEM PKCS 8 format. The file should be like:

 -----BEGIN PUBLIC KEY-----
 ...
 -----END PUBLIC KEY-----
 

Parameters:

filename - The name of the file

Throws:

IOException

encode

public String encode(String data)

Encrypt a message using the private key

Parameters:

data - The message you want to encrypt

Returns:

The ciphered message in base 64

decode

public String decode(String data)