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• JWSHeader.java

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com.microsoft.azure.keyvault.messagesecurity.JWSHeader Maven / Gradle / Ivy

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

package com.microsoft.azure.keyvault.messagesecurity;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.Objects;

/**
 * Json Web Signature header class.
 */
class JWSHeader {

    private String alg;
    private String kid;
    private String at;
    private long ts;
    private String p;
    private String typ;

    /**
     * Constructor.
     */
    JWSHeader() {
    }

    /**
     * Constructor.
     * 
     * @param alg
     *            signing algorithm (RS256).
     * @param kid
     *            signing key id.
     * @param at
     *            authorization token.
     * @param ts
     *            timestamp.
     * @param typ
     *            authorization type (PoP).
     * @param p
     *            p 
     */
    JWSHeader(String alg, String kid, String at, long ts, String typ, String p) {
        this.alg = alg;
        this.kid = kid;
        this.at = at;
        this.ts = ts;
        this.p = p;
        this.typ = typ;
    }

    /**
     * Compare two JwsHeader.
     * 
     * @return true if JWSHeaders are identical.
     */
    public boolean equals(JWSHeader other) {
        return this.alg.equals(other.alg) && this.kid.equals(other.kid) && this.at.equals(other.at)
                && this.ts == other.ts && this.p.equals(other.p) && this.typ.equals(other.typ);
    }

    @Override
    public boolean equals(Object object) {
        if (!(object instanceof JWSHeader)) {
            return false;
        }

        return object == this || equals((JWSHeader) object);
    }
    
    /**
     * Hash code for objects.
     * 
     * @return hashcode
     */
    public int hashCode() {
        return Objects.hash(this.alg, this.kid, this.at, this.ts, this.p, this.typ);
    }

    /**
     * Serialize JWSHeader to json string.
     * 
     * @return Json string with serialized JWSHeader.
     */
    public String serialize() throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();
        return mapper.writeValueAsString(this);
    }

    /**
     * Construct JWSHeader from json string.
     * 
     * @param json
     *            json string.
     * 
     * @return Constructed JWSHeader
     */
    public static JWSHeader deserialize(String json) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        return mapper.readValue(json, JWSHeader.class);
    }

    /**
     * Construct JWSHeader from base64url string.
     * 
     * @param base64
     *            base64 url string.
     * 
     * @return Constructed JWSHeader
     */
    public static JWSHeader fromBase64String(String base64) throws IOException {
        String json = MessageSecurityHelper.base64UrltoString(base64);
        ObjectMapper mapper = new ObjectMapper();
        return mapper.readValue(json, JWSHeader.class);
    }

    /**
     * signing algorithm (RS256).
     */
    @JsonProperty("alg")
    public String alg() {
        return alg;
    }

    /**
     * signing key id.
     */
    @JsonProperty("kid")
    public String kid() {
        return kid;
    }

    /**
     * authorization token.
     */
    @JsonProperty("at")
    public String at() {
        return at;
    }

    /**
     * timestamp.
     */
    @JsonProperty("ts")
    public long ts() {
        return ts;
    }

    /**
     * authorization type (PoP).
     */
    @JsonProperty("typ")
    public String typ() {
        return typ;
    }

    /**
     * p .
     */
    @JsonProperty("p")
    public String p() {
        return p;
    }
}