org.asunder.content
Class SSCHKContentManager

java.lang.Object
  org.asunder.content.AsunderContentManager
      org.asunder.content.SSCHKContentManager

public class SSCHKContentManager
extends AsunderContentManager

Author:

simms2k

Constructor Summary

SSCHKContentManager(SSCHKContent content)
Creates a new instance of SSCHKContentManager

Method Summary

void	computeDataDigest()
void	computeKbrIdBytes() Computes and sets the kbr id for the content
void	computeSignature(java.security.PrivateKey priKey) Computes the content's signature using the supplied private key (which must match the public key of course) as sign(prikey,concat(hash,path)) Assumes the dataDigest is correct, so be warned This can be processor intensive, so be sure to run in a thread
static SSCHKContent	generateSSCHKContent(byte[] data, java.security.PublicKey pubKey, java.security.PrivateKey priKey, java.lang.String path)
static SSCHKContentKey	generateSSCHKContentKey(byte[] dataDigest, java.security.PublicKey pubKey, java.lang.String path) Don't really know how fast this will run, so no recommendation on running in separate thread
protected byte[]	getComputedDataDigest()
protected byte[]	getComputedKbrIdBytes() Computes the kbrId bytes as digest(concat(pubkey,hash,path))
DHTContentKey	getContentKey()
byte[]	getDataDigest()
java.lang.String	getPath()
java.security.PublicKey	getPublicKey()
byte[]	getSignature()
boolean	verifyContent()
boolean	verifyDataDigest()
boolean	verifyKbrIdBytes() Verifies the the kbr ID is properly computed from the public key, data digest, and (optional) path
boolean	verifySignature() Verifies the contents signature.

Methods inherited from class org.asunder.content.AsunderContentManager

getManager

Methods inherited from class java.lang.Object

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

Constructor Detail

SSCHKContentManager

public SSCHKContentManager(SSCHKContent content)

Creates a new instance of SSCHKContentManager

Method Detail

getDataDigest

public byte[] getDataDigest()

getPath

public java.lang.String getPath()

getPublicKey

public java.security.PublicKey getPublicKey()

getSignature

public byte[] getSignature()

getContentKey

public DHTContentKey getContentKey()

getComputedDataDigest

protected byte[] getComputedDataDigest()
                                throws java.io.IOException,
                                       java.security.NoSuchAlgorithmException

Throws:

java.io.IOException

java.security.NoSuchAlgorithmException

computeDataDigest

public void computeDataDigest()
                       throws java.io.IOException,
                              java.security.NoSuchAlgorithmException

Throws:

java.io.IOException

java.security.NoSuchAlgorithmException

verifyDataDigest

public boolean verifyDataDigest()
                         throws java.io.IOException,
                                java.security.NoSuchAlgorithmException

Throws:

java.io.IOException

java.security.NoSuchAlgorithmException

verifySignature

public boolean verifySignature()
                        throws java.security.NoSuchAlgorithmException,
                               java.io.IOException,
                               java.security.SignatureException,
                               java.security.InvalidKeyException,
                               DHTContentHashException

Verifies the contents signature. as sign(prikey,concat(hash,path)) Be aware that this method assumes the dataDigest is correct This can be processor intensive, so be sure to run in a thread

Throws:

java.security.NoSuchAlgorithmException

java.io.IOException

java.security.SignatureException

java.security.InvalidKeyException

DHTContentHashException

computeSignature

public void computeSignature(java.security.PrivateKey priKey)
                      throws java.security.NoSuchAlgorithmException,
                             java.security.InvalidKeyException,
                             java.io.IOException,
                             java.security.SignatureException

Computes the content's signature using the supplied private key (which must match the public key of course) as sign(prikey,concat(hash,path)) Assumes the dataDigest is correct, so be warned This can be processor intensive, so be sure to run in a thread

Parameters:

priKey - the publisher's private key

Throws:

java.security.NoSuchAlgorithmException

java.security.InvalidKeyException

java.io.IOException

java.security.SignatureException

getComputedKbrIdBytes

protected byte[] getComputedKbrIdBytes()
                                throws DHTContentHashException,
                                       java.io.IOException,
                                       java.security.NoSuchAlgorithmException,
                                       java.security.SignatureException,
                                       java.security.InvalidKeyException

Computes the kbrId bytes as digest(concat(pubkey,hash,path))

Computes the data digest too if this is not set (but assumes it is correct if it is)

Returns:

the computed id bytes

Throws:

DHTContentHashException

java.io.IOException

java.security.NoSuchAlgorithmException

java.security.SignatureException

java.security.InvalidKeyException

computeKbrIdBytes

public void computeKbrIdBytes()
                       throws DHTContentHashException,
                              java.io.IOException,
                              java.security.NoSuchAlgorithmException,
                              java.security.SignatureException,
                              java.security.InvalidKeyException

Computes and sets the kbr id for the content

Notice that this does not involve the signature, so it may be computed without access to the private key

Throws:

DHTContentHashException

java.io.IOException

java.security.NoSuchAlgorithmException

java.security.SignatureException

java.security.InvalidKeyException

verifyKbrIdBytes

public boolean verifyKbrIdBytes()
                         throws DHTContentHashException,
                                java.io.IOException,
                                java.security.NoSuchAlgorithmException,
                                java.security.SignatureException,
                                java.security.InvalidKeyException

Verifies the the kbr ID is properly computed from the public key, data digest, and (optional) path

Notice that no assumptions are made as to the validity of the data digest

Returns:

whether the verification succeeds

Throws:

DHTContentHashException

java.io.IOException

java.security.NoSuchAlgorithmException

java.security.SignatureException

java.security.InvalidKeyException

verifyContent

public boolean verifyContent()
                      throws DHTContentHashException,
                             DHTContentSignatureException,
                             java.io.IOException,
                             java.security.NoSuchAlgorithmException,
                             java.security.SignatureException,
                             java.security.InvalidKeyException

Specified by:

verifyContent in class AsunderContentManager

Throws:

DHTContentHashException

DHTContentSignatureException

java.io.IOException

java.security.NoSuchAlgorithmException

java.security.SignatureException

java.security.InvalidKeyException

generateSSCHKContent

public static SSCHKContent generateSSCHKContent(byte[] data,
                                                java.security.PublicKey pubKey,
                                                java.security.PrivateKey priKey,
                                                java.lang.String path)
                                         throws DHTContentHashException,
                                                DHTContentSignatureException,
                                                java.io.IOException,
                                                java.security.NoSuchAlgorithmException,
                                                java.security.SignatureException,
                                                java.security.InvalidKeyException

Throws:

DHTContentHashException

DHTContentSignatureException

java.io.IOException

java.security.NoSuchAlgorithmException

java.security.SignatureException

java.security.InvalidKeyException

generateSSCHKContentKey

public static SSCHKContentKey generateSSCHKContentKey(byte[] dataDigest,
                                                      java.security.PublicKey pubKey,
                                                      java.lang.String path)
                                               throws DHTContentHashException,
                                                      java.io.IOException,
                                                      java.security.NoSuchAlgorithmException,
                                                      java.security.SignatureException,
                                                      java.security.InvalidKeyException

Don't really know how fast this will run, so no recommendation on running in separate thread

Returns:

a content key that can be used to search for content in the Asunder DHT

Throws:

DHTContentHashException

java.io.IOException

java.security.NoSuchAlgorithmException

java.security.SignatureException

java.security.InvalidKeyException