com.cisco.provisioning.cpe.extensions.configuration
Class PacketCableTFTPCrypto

java.lang.Object
  com.cisco.provisioning.cpe.extensions.configuration.PacketCableTFTPCrypto

public class PacketCableTFTPCrypto
extends Object

Singelton class that wraps the BouncyCastle JCE provider for some PacketCable operations.

Method Summary

static PacketCableTFTPCrypto	getInstance() Singelton accessor.
byte[]	getSHA1(byte[] buf, int offset, int buflen) Calculate the SHA1 digest of a binary buffer.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static PacketCableTFTPCrypto getInstance()

Singelton accessor.

Returns:

the PacketCableTFTPCrypto instance.

getSHA1

public byte[] getSHA1(byte[] buf,
                      int offset,
                      int buflen)
               throws NoSuchAlgorithmException,
                      NoSuchProviderException

Calculate the SHA1 digest of a binary buffer.

Parameters:

buf - the binary upon which the digest will be calculated.

offset - start calculation at this offset.

buflen - calculate offset for this number of bytes.

Returns:

the SHA1 digest calculation.

Throws:

NoSuchAlgorithmException

NoSuchProviderException