Module iu.util.crypt.impl

Package iu.crypt

Class Jws

java.lang.Object

iu.crypt.Jws

All Implemented Interfaces:

WebSignature

public class Jws
extends Object
implements WebSignature

JSON implementation of WebSignature.

Nested Class Summary

Nested classes/interfaces inherited from interface edu.iu.crypt.WebSignature

WebSignature.Builder<B extends WebSignature.Builder<B>>

Constructor Summary

Constructors

Constructor	Description
Jws(JsonObject protectedHeader, Jose header, byte[] signature)	Creates a new signed message;

Method Summary

Modifier and Type	Method	Description
(package private) static int	componentLength(WebKey.Type type)	Gets the expected signature component length by key type.
(package private) static byte[]	fromJce(WebKey.Type type, WebKey.Algorithm algorithm, byte[] jceSignature)	Converts a signature from JCE format to JWA
WebCryptoHeader	getHeader()	Gets the signature header.
byte[]	getSignature()	Gets the signature data.
(package private) String	getSignatureInput(byte[] payload)	Gets the signature input.
(package private) static Jws	parse(JsonValue jwsSignature)	Parses per-signature JWS parameters from raw JSON.
(package private) void	serializeTo(JsonObjectBuilder json)	Adds JWS per-signature parameters to a JsonObjectBuilder.
(package private) static byte[]	toJce(WebKey.Type type, WebKey.Algorithm algorithm, byte[] jwaSignature)	Converts a signature from JWA format to JCE
void	verify(byte[] payload, WebKey key)	Verifies the signature as valid.

Methods inherited from class java.lang.Object

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

Constructor Details

Jws

Jws(JsonObject protectedHeader,
 Jose header,
 byte[] signature)

Creates a new signed message;

Parameters:

protectedHeader - JWS protected header

header - JWS unprotected header

signature - signature

Method Details

getHeader

public WebCryptoHeader getHeader()

Description copied from interface: WebSignature

Gets the signature header.

Specified by:

getHeader in interface WebSignature

Returns:

WebCryptoHeader

getSignature

public byte[] getSignature()

Description copied from interface: WebSignature

Gets the signature data.

Specified by:

getSignature in interface WebSignature

Returns:

signature data

verify

public void verify(byte[] payload,
 WebKey key)

Description copied from interface: WebSignature

Verifies the signature as valid.

Specified by:

verify in interface WebSignature

Parameters:

payload - payload to verify the signature against

key - (public or shared) key to use for verifying the signature

componentLength

static int componentLength(WebKey.Type type)

Gets the expected signature component length by key type.

Parameters:

type - key type

Returns:

expected signature component length

toJce

static byte[] toJce(WebKey.Type type,
 WebKey.Algorithm algorithm,
 byte[] jwaSignature)

Converts a signature from JWA format to JCE

Parameters:

type - key type

algorithm - algorithm

jwaSignature - JWA formatted signature

Returns:

JCE formatted signature

fromJce

static byte[] fromJce(WebKey.Type type,
 WebKey.Algorithm algorithm,
 byte[] jceSignature)

Converts a signature from JCE format to JWA

Parameters:

type - key type

algorithm - algorithm

jceSignature - JCE calculated signature

Returns:

JWA formatted signature

parse

static Jws parse(JsonValue jwsSignature)

Parses per-signature JWS parameters from raw JSON.

Parameters:

jwsSignature - JSON

Returns:

parsed JWS parameters

serializeTo

void serializeTo(JsonObjectBuilder json)

Adds JWS per-signature parameters to a JsonObjectBuilder.

Parameters:

json - JsonObjectBuilder

getSignatureInput

String getSignatureInput(byte[] payload)

Gets the signature input.

Parameters:

payload - payload

Returns:

signature input