demo.pkcs
Class RSACipherProviderOAEP

java.lang.Object
  |
  +--iaik.pkcs.pkcs7.RSACipherProvider
        |
        +--demo.pkcs.RSACipherProviderOAEP

public class RSACipherProviderOAEP

extends RSACipherProvider

A RSA cipher provider that uses OEAP padding.

Version:

File Revision 7

Fields inherited from class iaik.pkcs.pkcs7.RSACipherProvider

cipherDecryptProvider_, cipherEncryptProvider_, DECRYPT_MODE, ENCRYPT_MODE

Constructor Summary

RSACipherProviderOAEP()
Default constructor.

RSACipherProviderOAEP(String cipherEncryptProvider, String cipherDecryptProvider)
Creates a new RSACipherProvider for the given RSA cipher en/decryption providers.

Method Summary

protected byte[]

cipher(int mode, Key key, byte[] data) En/deciphers the given data using RSA with OAEP padding.

Methods inherited from class iaik.pkcs.pkcs7.RSACipherProvider

setCipherProvider

Methods inherited from class java.lang.Object

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

Constructor Detail

RSACipherProviderOAEP

public RSACipherProviderOAEP()

Default constructor.

RSACipherProviderOAEP

public RSACipherProviderOAEP(String cipherEncryptProvider,
                             String cipherDecryptProvider)

Creates a new RSACipherProvider for the given RSA cipher en/decryption providers.

Parameters:

cipherEncryptProvider - the name of the crypto provider to be used for RSA encryption

cipherDecryptProvider - the name of the crypto provider to be used for RSA encryption

Method Detail

cipher

protected byte[] cipher(int mode,
                        Key key,
                        byte[] data)
                 throws NoSuchProviderException,
                        NoSuchAlgorithmException,
                        InvalidKeyException,
                        GeneralSecurityException

En/deciphers the given data using RSA with OAEP padding.

Overrides:

cipher in class RSACipherProvider

Parameters:

mode - the cipher mode, either ENCRYPT (1) or DECRYPT (2)

key - the key to be used

data - the data to be en/deciphered:

• for RecipientInfo cek encryption: the raw content encryption key
• for RecipientInfo cek decryption: the encrypted content encryption key

Returns:

the en/deciphered data:

• for RecipientInfo cek encryption: the encrypted content encryption key
• for RecipientInfo cek decryption: the raw (decrypted) content encryption key

Throws:

NoSuchProviderException - if any of the crypto providers of this RSACipherProvider is not suitable for requested operation

NoSuchAlgorithmException - if RSA ciphering is not supported

InvalidKeyException - if the supplied key is invalid

GeneralSecurityException - if a general security problem occurs