net.messagevortex.asn1

Class PrefixBlock

java.lang.Object

net.messagevortex.asn1.AbstractBlock

net.messagevortex.asn1.PrefixBlock

All Implemented Interfaces:

Serializable, Block, Dumpable

public class PrefixBlock
extends AbstractBlock
implements Serializable

ASN1 parser class for header reply.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static long	serialVersionUID

Fields inherited from class net.messagevortex.asn1.AbstractBlock

CRLF

Constructor Summary

Constructors

Constructor and Description
PrefixBlock() Creates a prefix with a random symmetric key.
PrefixBlock(org.bouncycastle.asn1.ASN1Primitive to, AsymmetricKey ak) Creates a prefix by parsing to in plan (unencrypted).
PrefixBlock(byte[] to, AsymmetricKey ak) Creates a prefix from the provided byte array by decyphering it with the provided key.
PrefixBlock(SymmetricKey sk) Creates a prefix with the given key.

Method Summary

Modifier and Type	Method and Description
String	dumpValueNotation(String prefix, DumpType dumpType)
boolean	equals(Object o)
AsymmetricKey	getDecryptionKey()
SymmetricKey	getKey()
int	hashCode()
boolean	isEncrypted() get the encryption status of the prefix block.
protected void	parse(org.bouncycastle.asn1.ASN1Encodable to)
AsymmetricKey	setDecryptionKey(AsymmetricKey dk) Sets the decryption key for the prefix block.
SymmetricKey	setKey(SymmetricKey dk) Sets the symmetric key contained in the block.
org.bouncycastle.asn1.ASN1Object	toAsn1Object(DumpType dumpType) Dumps an ASN.1 representation of the object.
byte[]	toEncBytes() Get the ASN.1 encoded prefix block in encrypted form.

Methods inherited from class net.messagevortex.asn1.AbstractBlock

fromBase64, fromHex, parse, prepareDump, toBase64, toBitString, toBytes, toDer, toHex

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

PrefixBlock

public PrefixBlock()
            throws IOException

Creates a prefix with a random symmetric key.

Throws:

IOException - if key generation fails

PrefixBlock

public PrefixBlock(SymmetricKey sk)
            throws IOException

Creates a prefix with the given key.

Parameters:

sk - symmetric key to embed in the prefix block

Throws:

IOException - if key generation fails

PrefixBlock

public PrefixBlock(org.bouncycastle.asn1.ASN1Primitive to,
                   AsymmetricKey ak)
            throws IOException

Creates a prefix by parsing to in plan (unencrypted).

Parameters:

to - The primitive to be parsed

ak - the asymmetric key required to decrypt the block

Throws:

IOException - if parsing fails

PrefixBlock

public PrefixBlock(byte[] to,
                   AsymmetricKey ak)
            throws IOException

Creates a prefix from the provided byte array by decyphering it with the provided key.

Parameters:

to - the ASN1 OCTET STRING containing the encrypted prefix

ak - the host key

Throws:

IOException - if parsing of the prefix block fails

Method Detail

parse

protected final void parse(org.bouncycastle.asn1.ASN1Encodable to)
                    throws IOException

Specified by:

parse in class AbstractBlock

Throws:

IOException

setDecryptionKey

public final AsymmetricKey setDecryptionKey(AsymmetricKey dk)
                                     throws IOException

Sets the decryption key for the prefix block.

If the prefixblock is already encrypted a decryption is attempted.

Parameters:

dk - the decryption key to be used when decrypting the block

Returns:

the previous decryption key

Throws:

IOException - if decryption tails

getDecryptionKey

public final AsymmetricKey getDecryptionKey()

setKey

public SymmetricKey setKey(SymmetricKey dk)

Sets the symmetric key contained in the block.

Parameters:

dk - the decryption key for all subsequent blocks

Returns:

the key set before the change

getKey

public SymmetricKey getKey()

toAsn1Object

public org.bouncycastle.asn1.ASN1Object toAsn1Object(DumpType dumpType)
                                              throws IOException

Description copied from interface: Dumpable

Dumps an ASN.1 representation of the object.

Specified by:

toAsn1Object in interface Dumpable

Parameters:

dumpType - the dump type to be used

Returns:

the ASN.1 string representation of the object

Throws:

IOException - if dumping of the object fails due to an illegal internal state of the object

dumpValueNotation

public String dumpValueNotation(String prefix,
                                DumpType dumpType)
                         throws IOException

Specified by:

dumpValueNotation in interface Block

Throws:

IOException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

isEncrypted

public boolean isEncrypted()

get the encryption status of the prefix block.

Returns:

true if the block is encrypted

toEncBytes

public byte[] toEncBytes()
                  throws IOException

Get the ASN.1 encoded prefix block in encrypted form.

Returns:

the encrypted ASN.1 rncoded block

Throws:

IOException - if encoding fails