Package com.dracoon.sdk.crypto.internal

Class AesGcmFileEncryptionCipher

java.lang.Object

com.dracoon.sdk.crypto.internal.AesGcmFileCipher

com.dracoon.sdk.crypto.internal.AesGcmFileEncryptionCipher

All Implemented Interfaces:

FileEncryptionCipher

public class AesGcmFileEncryptionCipher
extends AesGcmFileCipher
implements FileEncryptionCipher

Field Summary

Fields inherited from class com.dracoon.sdk.crypto.internal.AesGcmFileCipher

BLOCK_SIZE, realCipher, TAG_SIZE

Constructor Summary

Constructors

Constructor	Description
AesGcmFileEncryptionCipher(PlainFileKey fileKey)

Method Summary

Modifier and Type	Method	Description
EncryptedDataContainer	doFinal()	Completes the encryption and calculates a kind of checksum which is later used at the decryption to verify the integrity of decrypted bytes. After this method is called no further calls of processBytes and doFinal are possible.
EncryptedDataContainer	processBytes(PlainDataContainer plainData)	Encrypts some bytes. IMPORTANT!!!: After all plain bytes have been processed, doFinal must be called to complete the encryption.

Methods inherited from class com.dracoon.sdk.crypto.internal.AesGcmFileCipher

init, process

Methods inherited from class java.lang.Object

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

Constructor Details

AesGcmFileEncryptionCipher

public AesGcmFileEncryptionCipher(PlainFileKey fileKey)
                           throws CryptoSystemException

Throws:

CryptoSystemException

Method Details

processBytes

public EncryptedDataContainer processBytes(PlainDataContainer plainData)
                                    throws IllegalArgumentException,
IllegalStateException,
CryptoSystemException

Description copied from interface: FileEncryptionCipher

Encrypts some bytes.

IMPORTANT!!!: After all plain bytes have been processed, doFinal must be called to complete the encryption. Otherwise the encryption is not finished and the encrypted bytes can't later be decrypted.

Specified by:

processBytes in interface FileEncryptionCipher

Parameters:

plainData - The data container with the bytes to encrypt.

Returns:

The data container with the encrypted bytes.

Throws:

IllegalArgumentException - If the data container is invalid.

IllegalStateException - If the cipher is in an inappropriate state.

CryptoSystemException - If a unknown error occurred.

doFinal

public EncryptedDataContainer doFinal()
                               throws IllegalStateException,
CryptoSystemException

Description copied from interface: FileEncryptionCipher

Completes the encryption and calculates a kind of checksum which is later used at the decryption to verify the integrity of decrypted bytes.

After this method is called no further calls of processBytes and doFinal are possible.

Specified by:

doFinal in interface FileEncryptionCipher

Returns:

The data container with the encrypted bytes and the calculated tag.

Throws:

IllegalStateException - If the cipher is in an inappropriate state.

CryptoSystemException - If a unknown error occurred.