com.subgraph.orchid.crypto

Class TorMessageDigest

java.lang.Object

com.subgraph.orchid.crypto.TorMessageDigest

public class TorMessageDigest
extends Object

This class wraps the default cryptographic message digest algorithm used in Tor (SHA-1).

Field Summary

Fields

Modifier and Type	Field and Description
static int	TOR_DIGEST_SIZE
static int	TOR_DIGEST256_SIZE

Constructor Summary

Constructors

Constructor and Description
TorMessageDigest()
TorMessageDigest(boolean isDigest256)

Method Summary

Modifier and Type	Method and Description
byte[]	getDigestBytes() Return the digest value of all data processed up until this point.
HexDigest	getHexDigest() Calculate the digest value of all data processed up until this point and convert the digest into a HexDigest object.
boolean	isDigest256() Return true if this is a 256 bit digest instance.
byte[]	peekDigest(byte[] data, int offset, int length) Return what the digest for the current running hash would be IF we added data, but don't really add the data to the digest calculation.
void	update(byte[] input) Add the entire contents of the byte array input to the current digest calculation.
void	update(byte[] input, int offset, int length) Add length bytes of the contents of the byte array input beginning at offset into the array to the current digest calculation.
void	update(String input) Convert the String input into an array of bytes using the ISO-8859-1 encoding and add these bytes to the current digest calculation.

Methods inherited from class java.lang.Object

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

Field Detail

TOR_DIGEST_SIZE

public static final int TOR_DIGEST_SIZE

See Also:

Constant Field Values

TOR_DIGEST256_SIZE

public static final int TOR_DIGEST256_SIZE

See Also:

Constant Field Values

Constructor Detail

TorMessageDigest

public TorMessageDigest(boolean isDigest256)

TorMessageDigest

public TorMessageDigest()

Method Detail

isDigest256

public boolean isDigest256()

Return true if this is a 256 bit digest instance.

Returns:

true if this is a 256 bit digest instance.

getDigestBytes

public byte[] getDigestBytes()

Return the digest value of all data processed up until this point.

Returns:

The digest value as an array of TOR_DIGEST_SIZE or TOR_DIGEST256_SIZE bytes.

peekDigest

public byte[] peekDigest(byte[] data,
                         int offset,
                         int length)

Return what the digest for the current running hash would be IF we added data, but don't really add the data to the digest calculation.

getHexDigest

public HexDigest getHexDigest()

Calculate the digest value of all data processed up until this point and convert the digest into a HexDigest object.

Returns:

A new HexDigest object representing the current digest value.

See Also:

HexDigest

update

public void update(byte[] input)

Add the entire contents of the byte array input to the current digest calculation.

Parameters:

input - An array of input bytes to process.

update

public void update(byte[] input,
                   int offset,
                   int length)

Add length bytes of the contents of the byte array input beginning at offset into the array to the current digest calculation.

Parameters:

input - An array of input bytes to process.

offset - The offset into the input array to begin processing.

length - A count of how many bytes of the input array to process.

update

public void update(String input)

Convert the String input into an array of bytes using the ISO-8859-1 encoding and add these bytes to the current digest calculation.

Parameters:

input - A string to process.