nl.martijndwars.webpush

Class HttpEce

java.lang.Object

nl.martijndwars.webpush.HttpEce

public class HttpEce
extends java.lang.Object

An implementation of HTTP ECE (Encrypted Content Encoding) as described in https://tools.ietf.org/html/draft-ietf-httpbis-encryption-encoding-01

Constructor Summary

Constructors

Constructor and Description
HttpEce(java.util.Map<java.lang.String,java.security.KeyPair> keys, java.util.Map<java.lang.String,java.lang.String> labels)

Method Summary

Modifier and Type	Method and Description
protected static byte[]	buildInfo(java.lang.String type, byte[] context) Future versions might require a null-terminated info string?
byte[][]	deriveKey(byte[] salt, byte[] key, java.lang.String keyId, java.security.PublicKey dh, byte[] authSecret, int padSize)
byte[]	encrypt(byte[] buffer, byte[] salt, byte[] key, java.lang.String keyid, java.security.PublicKey dh, byte[] authSecret, int padSize)
protected static byte[]	hkdfExpand(byte[] ikm, byte[] salt, byte[] info, int length) Convenience method for computing the HMAC Key Derivation Function.

Methods inherited from class java.lang.Object

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

Constructor Detail

HttpEce

public HttpEce(java.util.Map<java.lang.String,java.security.KeyPair> keys,
               java.util.Map<java.lang.String,java.lang.String> labels)

Method Detail

buildInfo

protected static byte[] buildInfo(java.lang.String type,
                                  byte[] context)

Future versions might require a null-terminated info string?

Parameters:

type -

Returns:

deriveKey

public byte[][] deriveKey(byte[] salt,
                          byte[] key,
                          java.lang.String keyId,
                          java.security.PublicKey dh,
                          byte[] authSecret,
                          int padSize)
                   throws javax.crypto.NoSuchPaddingException,
                          java.security.NoSuchAlgorithmException,
                          java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException,
                          javax.crypto.BadPaddingException,
                          javax.crypto.IllegalBlockSizeException,
                          java.security.NoSuchProviderException,
                          java.io.IOException

Throws:

javax.crypto.NoSuchPaddingException

java.security.NoSuchAlgorithmException

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

javax.crypto.BadPaddingException

javax.crypto.IllegalBlockSizeException

java.security.NoSuchProviderException

java.io.IOException

hkdfExpand

protected static byte[] hkdfExpand(byte[] ikm,
                                   byte[] salt,
                                   byte[] info,
                                   int length)
                            throws java.security.InvalidKeyException,
                                   java.security.NoSuchAlgorithmException

Convenience method for computing the HMAC Key Derivation Function. The real work is offloaded to BouncyCastle.

Throws:

java.security.InvalidKeyException

java.security.NoSuchAlgorithmException

encrypt

public byte[] encrypt(byte[] buffer,
                      byte[] salt,
                      byte[] key,
                      java.lang.String keyid,
                      java.security.PublicKey dh,
                      byte[] authSecret,
                      int padSize)
               throws javax.crypto.NoSuchPaddingException,
                      java.security.InvalidAlgorithmParameterException,
                      java.security.NoSuchAlgorithmException,
                      javax.crypto.IllegalBlockSizeException,
                      javax.crypto.BadPaddingException,
                      java.security.InvalidKeyException,
                      java.security.NoSuchProviderException,
                      java.io.IOException

Throws:

javax.crypto.NoSuchPaddingException

java.security.InvalidAlgorithmParameterException

java.security.NoSuchAlgorithmException

javax.crypto.IllegalBlockSizeException

javax.crypto.BadPaddingException

java.security.InvalidKeyException

java.security.NoSuchProviderException

java.io.IOException