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/*
* Copyright (C) 2014 jsonwebtoken.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.jsonwebtoken;
/**
* A JWS header.
*
* @param header type
* @since 0.1
*/
public interface JwsHeader> extends Header {
/** JWS {@code Algorithm} header parameter name: "alg" */
public static final String ALGORITHM = "alg";
/** JWS {@code JWT Set URL} header parameter name: "jku" */
public static final String JWK_SET_URL = "jku";
/** JWS {@code JSON Web Key} header parameter name: "jwk" */
public static final String JSON_WEB_KEY = "jwk";
/** JWS {@code Key ID} header parameter name: "kid" */
public static final String KEY_ID = "kid";
/** JWS {@code X.509 URL} header parameter name: "x5u" */
public static final String X509_URL = "x5u";
/** JWS {@code X.509 Certificate Chain} header parameter name: "x5c" */
public static final String X509_CERT_CHAIN = "x5c";
/** JWS {@code X.509 Certificate SHA-1 Thumbprint} header parameter name: "x5t" */
public static final String X509_CERT_SHA1_THUMBPRINT = "x5t";
/** JWS {@code X.509 Certificate SHA-256 Thumbprint} header parameter name: "x5t#S256" */
public static final String X509_CERT_SHA256_THUMBPRINT = "x5t#S256";
/** JWS {@code Critical} header parameter name: "crit" */
public static final String CRITICAL = "crit";
/**
* Returns the JWS
* alg (algorithm) header value or {@code null} if not present.
*
* The algorithm header parameter identifies the cryptographic algorithm used to secure the JWS. Consider
* using {@link io.jsonwebtoken.SignatureAlgorithm#forName(String) SignatureAlgorithm.forName} to convert this
* string value to a type-safe enum instance.
*
* @return the JWS {@code alg} header value or {@code null} if not present. This will always be
* {@code non-null} on validly constructed JWS instances, but could be {@code null} during construction.
*/
String getAlgorithm();
/**
* Sets the JWT
* alg (Algorithm) header value. A {@code null} value will remove the property from the JSON map.
*
* The algorithm header parameter identifies the cryptographic algorithm used to secure the JWS. Consider
* using a type-safe {@link io.jsonwebtoken.SignatureAlgorithm SignatureAlgorithm} instance and using its
* {@link io.jsonwebtoken.SignatureAlgorithm#getValue() value} as the argument to this method.
*
* @param alg the JWS {@code alg} header value or {@code null} to remove the property from the JSON map.
* @return the {@code Header} instance for method chaining.
*/
T setAlgorithm(String alg);
/**
* Returns the JWS
* kid (Key ID) header value or {@code null} if not present.
*
* The keyId header parameter is a hint indicating which key was used to secure the JWS. This parameter allows
* originators to explicitly signal a change of key to recipients. The structure of the keyId value is
* unspecified.
*
* When used with a JWK, the keyId value is used to match a JWK {@code keyId} parameter value.
*
* @return the JWS {@code kid} header value or {@code null} if not present.
*/
String getKeyId();
/**
* Sets the JWT
* kid (Key ID) header value. A {@code null} value will remove the property from the JSON map.
*
* The keyId header parameter is a hint indicating which key was used to secure the JWS. This parameter allows
* originators to explicitly signal a change of key to recipients. The structure of the keyId value is
* unspecified.
*
* When used with a JWK, the keyId value is used to match a JWK {@code keyId} parameter value.
*
* @param kid the JWS {@code kid} header value or {@code null} to remove the property from the JSON map.
* @return the {@code Header} instance for method chaining.
*/
T setKeyId(String kid);
}