Module iu.util.crypt.impl

Package iu.crypt

Class EncodingUtils

java.lang.Object

iu.crypt.EncodingUtils

class EncodingUtils
extends Object

Provides basic internal binary encoding behavior for JSON web crypto algorithms.

Method Summary

Modifier and Type	Method	Description
(package private) static void	bigEndian(int value, ByteBuffer buffer)	Copies an 32-bit integer into a ByteBuffer
(package private) static void	bigEndian(long value, ByteBuffer buffer)	Copies an 64-bit long into a ByteBuffer
(package private) static byte[]	concatKdf(int round, byte[] z, byte[] algid, byte[] uinfo, byte[] vinfo, int datalen)	Gets the hash input data for one round of the NIST.800-56A Section 5.8.1 Concatenated Key Derivation Format (KDF)
(package private) static void	concatKdfFragment(byte[] data, ByteBuffer buffer)	Encodes data in NIST.800-56A Concatenated Key Derivation Format (KDF).
(package private) static byte[]	reverse(byte[] bytes)	Reverses byte order

Methods inherited from class java.lang.Object

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

Method Details

bigEndian

static void bigEndian(int value,
 ByteBuffer buffer)

Copies an 32-bit integer into a ByteBuffer

Parameters:

value - integer to encode

buffer - ByteBuffer

bigEndian

static void bigEndian(long value,
 ByteBuffer buffer)

Copies an 64-bit long into a ByteBuffer

Parameters:

value - integer to encode

buffer - ByteBuffer

concatKdfFragment

static void concatKdfFragment(byte[] data,
 ByteBuffer buffer)

Encodes data in NIST.800-56A Concatenated Key Derivation Format (KDF).

Parameters:

data - data to encode

buffer - ByteBuffer

concatKdf

static byte[] concatKdf(int round,
 byte[] z,
 byte[] algid,
 byte[] uinfo,
 byte[] vinfo,
 int datalen)

Gets the hash input data for one round of the NIST.800-56A Section 5.8.1 Concatenated Key Derivation Format (KDF)

Parameters:

round - round number

z - key derivation output

algid - algorithm ID

uinfo - party UInfo value

vinfo - party VInfo value

datalen - data length

Returns:

Concat KDF hash input

reverse

static byte[] reverse(byte[] bytes)

Reverses byte order

Parameters:

bytes - big-endian data (or vice-versa)

Returns:

little-endian data (or vice-versa)