com.pkware.smartcrypt.structured

Interface LengthPreservingEncryption

All Superinterfaces:

AutoCloseable, Closeable

public interface LengthPreservingEncryption
extends Closeable

AES CFB without padding. The length of the cipher text is the same as the length of the plain text.

Method Summary

Modifier and Type	Method and Description
InputStream	createDecryptionStream(InputStream stream, byte[] initializationVector)
OutputStream	createEncryptionStream(OutputStream stream, byte[] initializationVector)
byte[]	decrypt(byte[] data, byte[] initializationVector)
byte[]	encrypt(byte[] data, byte[] initializationVector)

Methods inherited from interface java.io.Closeable

close

Method Detail

encrypt

@CheckReturnValue
 @Nonnull
byte[] encrypt(byte[] data,
                                           byte[] initializationVector)
                                    throws GeneralSecurityException,
                                           com.pkware.archive.ArchiveException,
                                           MetaClientException

Parameters:

initializationVector - must be 16 bytes

Throws:

GeneralSecurityException - For various reasons, including:

• If the algorithm being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the padding being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the security policy is not configured to allow the complexity of the AES key
• If the initialization vector (IV) does not match the AES mode

com.pkware.archive.ArchiveException - if not licensed for this operation. See PKSession.allowSymmetricEncryption().

MetaClientException - if this key is not allowed to be used for encryption. See Smartkey.canEncrypt().

See Also:

JCA Providers and the Security Policy

decrypt

@Nonnull
byte[] decrypt(byte[] data,
                        byte[] initializationVector)
                 throws GeneralSecurityException,
                        com.pkware.archive.ArchiveException,
                        MetaClientException

Parameters:

initializationVector - must be 16 bytes

Throws:

GeneralSecurityException - For various reasons, including:

• If the algorithm being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the padding being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the security policy is not configured to allow the complexity of the AES key
• If the initialization vector (IV) does not match the AES mode

com.pkware.archive.ArchiveException - if not licensed for this operation. See PKSession.allowSymmetricEncryption().

MetaClientException - if this key is not allowed to be used for decryption. See Smartkey.canDecrypt().

See Also:

JCA Providers and the Security Policy

createEncryptionStream

@CheckReturnValue
 @Nonnull
OutputStream createEncryptionStream(OutputStream stream,
                                                                byte[] initializationVector)
                                                         throws GeneralSecurityException,
                                                                com.pkware.archive.ArchiveException,
                                                                MetaClientException

Parameters:

initializationVector - must be 16 bytes

Throws:

GeneralSecurityException - For various reasons, including:

• If the algorithm being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the padding being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the security policy is not configured to allow the complexity of the AES key
• If the initialization vector (IV) does not match the AES mode

com.pkware.archive.ArchiveException - if not licensed for this operation. See PKSession.allowSymmetricEncryption().

MetaClientException - if this key is not allowed to be used for encryption. See Smartkey.canEncrypt().

See Also:

JCA Providers and the Security Policy

createDecryptionStream

@Nonnull
InputStream createDecryptionStream(InputStream stream,
                                            byte[] initializationVector)
                                     throws GeneralSecurityException,
                                            com.pkware.archive.ArchiveException,
                                            MetaClientException

Parameters:

initializationVector - must be 16 bytes

Throws:

GeneralSecurityException - For various reasons, including:

• If the algorithm being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the padding being used is unavailable, as is the case if the JCA provider being used is insufficient
• If the security policy is not configured to allow the complexity of the AES key
• If the initialization vector (IV) does not match the AES mode

com.pkware.archive.ArchiveException - if not licensed for this operation. See PKSession.allowSymmetricEncryption().

MetaClientException - if this key is not allowed to be used for decryption. See Smartkey.canDecrypt().

See Also:

JCA Providers and the Security Policy