nl.martijndwars.webpush

Class PushService

java.lang.Object

nl.martijndwars.webpush.PushService

public class PushService
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
PushService()
PushService(java.lang.String gcmApiKey)

Method Summary

Modifier and Type	Method and Description
static javax.crypto.SecretKey	computeSecret(java.security.PrivateKey privateKey, java.security.PublicKey publicKey) Compute the shared secret
static Encrypted	encrypt(java.security.PublicKey userPublicKey, byte[] payload) Encrypt the payload using the user's public key using Elliptic Curve Diffie Hellman cryptography over the prime256v1 curve.
static byte[]	encrypt(javax.crypto.SecretKey secret, byte[] salt, byte[] payload) Encrypt payload according to Encrypted Content-Encoding for HTTP.
protected static byte[]	hkdfExpand(byte[] ikm, byte[] salt, byte[] info, int length) Convenience method for computing the HMAC Key Derivation Function.
protected static byte[]	info(java.lang.String base) Future versions might require a null-terminated info string?
java.util.concurrent.Future<org.apache.http.client.fluent.Content>	send(Notification notification) Send a notification

Methods inherited from class java.lang.Object

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

Constructor Detail

PushService

public PushService()

PushService

public PushService(java.lang.String gcmApiKey)

Method Detail

encrypt

public static Encrypted encrypt(java.security.PublicKey userPublicKey,
                                byte[] payload)
                         throws java.security.NoSuchProviderException,
                                java.security.NoSuchAlgorithmException,
                                java.security.InvalidAlgorithmParameterException,
                                java.security.InvalidKeyException,
                                javax.crypto.NoSuchPaddingException,
                                javax.crypto.BadPaddingException,
                                javax.crypto.IllegalBlockSizeException,
                                java.security.spec.InvalidKeySpecException

Encrypt the payload using the user's public key using Elliptic Curve Diffie Hellman cryptography over the prime256v1 curve.

Returns:

An Encrypted object containing the public key, salt, and ciphertext, which can be sent to the other party.

Throws:

java.security.NoSuchProviderException

java.security.NoSuchAlgorithmException

java.security.InvalidAlgorithmParameterException

java.security.InvalidKeyException

javax.crypto.NoSuchPaddingException

javax.crypto.BadPaddingException

javax.crypto.IllegalBlockSizeException

java.security.spec.InvalidKeySpecException

computeSecret

public static javax.crypto.SecretKey computeSecret(java.security.PrivateKey privateKey,
                                                   java.security.PublicKey publicKey)
                                            throws java.security.NoSuchProviderException,
                                                   java.security.NoSuchAlgorithmException,
                                                   java.security.InvalidKeyException

Compute the shared secret

Parameters:

privateKey -

publicKey -

Returns:

Throws:

java.security.NoSuchProviderException

java.security.NoSuchAlgorithmException

java.security.InvalidKeyException

encrypt

public static byte[] encrypt(javax.crypto.SecretKey secret,
                             byte[] salt,
                             byte[] payload)
                      throws javax.crypto.NoSuchPaddingException,
                             java.security.NoSuchAlgorithmException,
                             java.security.InvalidKeyException,
                             java.security.InvalidAlgorithmParameterException,
                             javax.crypto.BadPaddingException,
                             javax.crypto.IllegalBlockSizeException

Encrypt payload according to Encrypted Content-Encoding for HTTP. That is, use aesgcm-128 with given secret key and salt.

Parameters:

secret -

salt -

payload -

Returns:

Throws:

javax.crypto.NoSuchPaddingException

java.security.NoSuchAlgorithmException

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

javax.crypto.BadPaddingException

javax.crypto.IllegalBlockSizeException

info

protected static byte[] info(java.lang.String base)

Future versions might require a null-terminated info string?

Parameters:

base -

Returns:

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

send

public java.util.concurrent.Future<org.apache.http.client.fluent.Content> send(Notification notification)
                                                                        throws javax.crypto.NoSuchPaddingException,
                                                                               java.security.InvalidKeyException,
                                                                               java.security.NoSuchAlgorithmException,
                                                                               javax.crypto.IllegalBlockSizeException,
                                                                               javax.crypto.BadPaddingException,
                                                                               java.security.NoSuchProviderException,
                                                                               java.security.InvalidAlgorithmParameterException,
                                                                               java.io.IOException,
                                                                               java.security.spec.InvalidKeySpecException

Send a notification

Throws:

javax.crypto.NoSuchPaddingException

java.security.InvalidKeyException

java.security.NoSuchAlgorithmException

javax.crypto.IllegalBlockSizeException

javax.crypto.BadPaddingException

java.security.NoSuchProviderException

java.security.InvalidAlgorithmParameterException

java.io.IOException

java.security.spec.InvalidKeySpecException