jsimple.oauth.utils

Class Sha1

java.lang.Object

jsimple.oauth.utils.Sha1

public final class Sha1
extends java.lang.Object

SHA-1 message digest implementation, translated from C source code (the origin is unknown).

Field Summary

Fields

Modifier and Type	Field and Description
static int	DIGEST_SIZE size of a SHA-1 digest in octets

Constructor Summary

Constructors

Constructor and Description
Sha1() Default constructor.

Method Summary

Modifier and Type	Method and Description
byte[]	digest() Finishes computing the digest & then returns it.
byte[]	digest(byte[] input) Does a final update, with the passed input, then computes the SHA1 digest, which is returned.
static byte[]	hmac(byte[] key, byte[] message) Compute the HMAC-SHA1 for the specified message & key.
void	reset() Initializes (or resets) the hasher for a new session.
void	update(byte bB) Adds a single byte to the digest.
void	update(byte[] data) Adds a byte array to the digest.
void	update(byte[] data, int nOfs, int nLen) Adds a portion of a byte array to the digest.

Methods inherited from class java.lang.Object

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

Field Detail

DIGEST_SIZE

public static final int DIGEST_SIZE

size of a SHA-1 digest in octets

See Also:

Constant Field Values

Constructor Detail

Sha1

public Sha1()

Default constructor.

Method Detail

reset

public void reset()

Initializes (or resets) the hasher for a new session.

update

public void update(byte bB)

Adds a single byte to the digest.

Parameters:

bB - the byte to add

update

public void update(byte[] data)

Adds a byte array to the digest.

Parameters:

data - the data to add

update

public void update(byte[] data,
                   int nOfs,
                   int nLen)

Adds a portion of a byte array to the digest.

Parameters:

data - the data to add

digest

public byte[] digest()

Finishes computing the digest & then returns it. After that, the instance is reset.

Returns:

the digest bytes as an array if DIGEST_SIZE bytes

digest

public byte[] digest(byte[] input)

Does a final update, with the passed input, then computes the SHA1 digest, which is returned. After that the instance is reset.

Parameters:

input - data to update

Returns:

SHA1 digest

hmac

public static byte[] hmac(byte[] key,
                          byte[] message)

Compute the HMAC-SHA1 for the specified message & key. The implementation here was taken from http://en.wikipedia.org/wiki/Hash-based_message_authentication_code pseudocode, then implement by me (Bret).

Parameters:

key - HMAC key

message - message

Returns:

SHA1 HMAC