nl.martijndwars.webpush

Class Utils

java.lang.Object

nl.martijndwars.webpush.Utils

public class Utils
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ALGORITHM
static java.lang.String	CURVE

Constructor Summary

Constructors

Constructor and Description
Utils()

Method Summary

Modifier and Type	Method and Description
static int	combinedLength(byte[]... arrays) Compute combined array length
static byte[]	concat(byte[]... arrays) Utility to concat byte arrays
static byte[]	encode(org.bouncycastle.jce.interfaces.ECPrivateKey privateKey)
static byte[]	encode(org.bouncycastle.jce.interfaces.ECPublicKey publicKey) Get the uncompressed encoding of the public key point.
static java.security.PrivateKey	loadPrivateKey(java.lang.String encodedPrivateKey) Load the private key from a URL-safe base64 encoded string
static org.bouncycastle.jce.interfaces.ECPublicKey	loadPublicKey(org.bouncycastle.jce.interfaces.ECPrivateKey privateKey) Load a public key from the private key.
static java.security.PublicKey	loadPublicKey(java.lang.String encodedPublicKey) Load the public key from a URL-safe base64 encoded string.
static byte[]	toByteArray(int integer, int size) Create a byte array of the given length from the given integer.
static boolean	verifyKeyPair(java.security.PrivateKey privateKey, java.security.PublicKey publicKey) Verify that the private key belongs to the public key.

Methods inherited from class java.lang.Object

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

Field Detail

CURVE

public static final java.lang.String CURVE

See Also:

Constant Field Values

ALGORITHM

public static final java.lang.String ALGORITHM

See Also:

Constant Field Values

Constructor Detail

Utils

public Utils()

Method Detail

encode

public static byte[] encode(org.bouncycastle.jce.interfaces.ECPublicKey publicKey)

Get the uncompressed encoding of the public key point. The resulting array should be 65 bytes length and start with 0x04 followed by the x and y coordinates (32 bytes each).

Parameters:

publicKey -

Returns:

encode

public static byte[] encode(org.bouncycastle.jce.interfaces.ECPrivateKey privateKey)

loadPublicKey

public static java.security.PublicKey loadPublicKey(java.lang.String encodedPublicKey)
                                             throws java.security.NoSuchProviderException,
                                                    java.security.NoSuchAlgorithmException,
                                                    java.security.spec.InvalidKeySpecException

Load the public key from a URL-safe base64 encoded string. Takes into account the different encodings, including point compression.

Parameters:

encodedPublicKey -

Throws:

java.security.NoSuchProviderException

java.security.NoSuchAlgorithmException

java.security.spec.InvalidKeySpecException

loadPrivateKey

public static java.security.PrivateKey loadPrivateKey(java.lang.String encodedPrivateKey)
                                               throws java.security.NoSuchProviderException,
                                                      java.security.NoSuchAlgorithmException,
                                                      java.security.spec.InvalidKeySpecException

Load the private key from a URL-safe base64 encoded string

Parameters:

encodedPrivateKey -

Returns:

Throws:

java.security.NoSuchProviderException

java.security.NoSuchAlgorithmException

java.security.spec.InvalidKeySpecException

loadPublicKey

public static org.bouncycastle.jce.interfaces.ECPublicKey loadPublicKey(org.bouncycastle.jce.interfaces.ECPrivateKey privateKey)
                                                                 throws java.security.NoSuchProviderException,
                                                                        java.security.NoSuchAlgorithmException,
                                                                        java.security.spec.InvalidKeySpecException

Load a public key from the private key.

Parameters:

privateKey -

Returns:

Throws:

java.security.NoSuchProviderException

java.security.NoSuchAlgorithmException

java.security.spec.InvalidKeySpecException

verifyKeyPair

public static boolean verifyKeyPair(java.security.PrivateKey privateKey,
                                    java.security.PublicKey publicKey)

Verify that the private key belongs to the public key.

Parameters:

privateKey -

publicKey -

Returns:

concat

public static byte[] concat(byte[]... arrays)

Utility to concat byte arrays

combinedLength

public static int combinedLength(byte[]... arrays)

Compute combined array length

toByteArray

public static byte[] toByteArray(int integer,
                                 int size)

Create a byte array of the given length from the given integer.

Parameters:

integer -

size -

Returns: