Aqara Home v2.4.1版本的 MD5 值为：529779ac2bc0131db52a1fc3098d2b35

以下内容为反编译后的 Principal.java 源代码，内容仅作参考

package com.amazonaws.auth.policy;

import com.amazonaws.auth.policy.internal.JsonPolicyReader;
public class Principal {
    public static final Principal c = new Principal("AWS", "*");
    public static final Principal d = new Principal("Service", "*");
    public static final Principal f2154e = new Principal(JsonPolicyReader.d, "*");
    public static final Principal f2155f = new Principal("*", "*");
    public final String a;
    public final String b;

    public enum Services {
        AWSDataPipeline("datapipeline.amazonaws.com"),
        AmazonElasticTranscoder("elastictranscoder.amazonaws.com"),
        AmazonEC2("ec2.amazonaws.com"),
        AWSOpsWorks("opsworks.amazonaws.com"),
        AWSCloudHSM("cloudhsm.amazonaws.com"),
        AllServices("*");
        
        public String serviceId;

        Services(String str) {
            this.serviceId = str;
        }

        public static Services fromString(String str) {
            Services[] values;
            if (str != null) {
                for (Services services : values()) {
                    if (services.getServiceId().equalsIgnoreCase(str)) {
                        return services;
                    }
                }
                return null;
            }
            return null;
        }

        public String getServiceId() {
            return this.serviceId;
        }
    }

    public enum WebIdentityProviders {
        Facebook("graph.facebook.com"),
        Google("accounts.google.com"),
        Amazon("www.amazon.com"),
        AllProviders("*");
        
        public String webIdentityProvider;

        WebIdentityProviders(String str) {
            this.webIdentityProvider = str;
        }

        public static WebIdentityProviders fromString(String str) {
            WebIdentityProviders[] values;
            if (str != null) {
                for (WebIdentityProviders webIdentityProviders : values()) {
                    if (webIdentityProviders.getWebIdentityProvider().equalsIgnoreCase(str)) {
                        return webIdentityProviders;
                    }
                }
                return null;
            }
            return null;
        }

        public String getWebIdentityProvider() {
            return this.webIdentityProvider;
        }
    }

    public Principal(Services services) {
        if (services != null) {
            this.a = services.getServiceId();
            this.b = "Service";
            return;
        }
        throw new IllegalArgumentException("Null AWS service name specified");
    }

    public String a() {
        return this.a;
    }

    public String b() {
        return this.b;
    }

    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj != null && (obj instanceof Principal)) {
            Principal principal = (Principal) obj;
            return b().equals(principal.b()) && a().equals(principal.a());
        }
        return false;
    }

    public int hashCode() {
        return ((this.b.hashCode() + 31) * 31) + this.a.hashCode();
    }

    public Principal(String str, String str2) {
        this.b = str;
        this.a = "AWS".equals(str) ? str2.replaceAll("-", "") : str2;
    }

    public Principal(String str) {
        if (str != null) {
            this.a = str.replaceAll("-", "");
            this.b = "AWS";
            return;
        }
        throw new IllegalArgumentException("Null AWS account ID specified");
    }

    public Principal(WebIdentityProviders webIdentityProviders) {
        if (webIdentityProviders != null) {
            this.a = webIdentityProviders.getWebIdentityProvider();
            this.b = JsonPolicyReader.d;
            return;
        }
        throw new IllegalArgumentException("Null web identity provider specified");
    }
}