pki

1. 基本说明 　　本文章将演示CentOS 8二进制方式安装高可用k8s 1.16.x，相对于其他版本，二进制安装方式并无太大区别。CentOS 8相对于CentOS 7操作更加方便，比如一些服务的关闭，无需修改配置文件即可永久生效，CentOS 8默认安装的内核版本是4.18，所以在安装k8s的过程中也无需在进行内核升级，系统环境也可按需升级，如果下载的是最新版的CentOS 8，系统升级也可省略。 2. 基本环境配置 　　主机信息 192.168.1.19 k8s-master01 192.168.1.18 k8s-master02 192.168.1.20 k8s-master03 192.168.1.88 k8s-master-lb 192.168.1.21 k8s-node01 192.168.1.22 k8s-node02 　　系统环境 [root@k8s-master01 ~]# cat /etc/redhat-release CentOS Linux release 8.0.1905 (Core) [root@k8s-master01 ~]# uname -a Linux k8s-master01 4.18.0-80.el8.x86_64 #1 SMP Tue Jun 4 09:19:46 UTC 2019 x86_64 x86_64 x86_64 GNU

public class CustomTrustManager implements X509TrustManager { private X509TrustManager trustManager; // If a connection was previously attempted and failed the certificate check, that certificate chain will be saved here. private Certificate[] rejectedCertificates = null; private Certificate[] encounteredCertificates = null; private KeyStore keyStore = null; private Logger logger; /** * Constructor * * @param loggerFactory * see {@link InstanceLoggerFactory} */ public CustomTrustManager(InstanceLoggerFactory loggerFactory) { try { this.logger = loggerFactory.getLogger(CustomTrustManager.class)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have set up a centOS 6.5 server using VMWare Workstation 9 on a Windows 8.1 host laptop. When trying to use yum to install packages I get the following error: [root@localhost ~]# yum update Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile YumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. </html>/ removing mirrorlist with no valid mirrors: /var/cache/yum/i386/6/base/mirrorlist.txt Error: Cannot find a valid baseurl for repo: base The VM works on other machines ( Windows 7 desktop and an Windows 8

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a remote Windows 7 server that is accessible only via HTTPS on port 768. The server is using a signed certificate from a CA listed in the local CentOS server. Whenever I try to access the remote server via cURL using the following command, it errors out as follows: [usr@serv certs]# curl -3 -v https://1.1.1.1:768/user/login * About to connect() to 1.1.1.1 port 768 (#0) * Trying 1.1.1.1... connected * Connected to 1.1.1.1 (1.1.1.1) port 768 (#0) * Initializing NSS with certpath: sql:/etc/pki/nssdb * CAfile: /etc/pki/tls/certs/ca-bundle

案例1：邮件TLS/SSL加密通信 1 案例1：邮件TLS/SSL加密通信 1.1 问题 本案例要求为基于Postfix+Dovecot的邮件服务器提供加密通信支持，主要完成以下任务操作： 为SMTP服务（postfix）添加TLS/SSL加密通信支持 基于dovecot配置POP3s+IMAPS加密通信支持 客户端收发信测试，确保加密的邮件通信可用 1.2 方案 使用两台RHEL7虚拟机，其中svr7作为CA服务器，而mail作为测试用的Postfix+Dovecot邮件服务器。另外可准备一台pc120作为收发邮件的Windows测试机，安装邮件客户端软件或Outlook 2010。 1.3 步骤 实现此案例需要按照如下步骤进行。 步骤一：准备一个简单的Postfix+Dovecot邮件服务器，支持SMTP认证 1） 快速安装邮件相关软件、添加邮箱账号 确认已安装postfix、dovecot、cyrus-sasl软件包,启动saslauthd服务: [root@www ~]# yum -y install postfix dovecot cyrus-sasl .. .. [root@www ~]# vim /etc/sasl2/smtpd.conf pwcheck_method: saslauthd mech_list: plain login [root@www ~]#

区块链网络中存在如下的角色：peers， orderers, client application, administrators等等。每一个这样的角色都有一个身份标识（Identity），该身份标识是通过X.509 数字证书来表示的。这些身份标识决定了该角色的对区块链网络上资源的权限，比如是否有权限访问区块链上的某种信息。 数字身份有很多附加属性，供fabric来判断权限。数字身份给出了一个身份的组合结构，与之相关的属性称之为principal。Principals 就像用户ID或者是群组ID，但是更加复杂，因为principal中包含了该角色的一系列属性信息。当我们谈论principal的时候，就是在说觉得角色权限的各种属性信息。 为了保证身份（identity）是可以被验证的，Identity必须来自于一个受信任的颁发机构。在Fabric中，这是通过membership service provider (MSP) 来实现的。MSP是Fabric中的一个组件，它定义了管理有效identity的规则。Fabric中默认的MSP实现是使用X.509证书作为identity，采用传统的PKI（Public Key Infrastructure ）结构模型。 假设你正在逛超市买东西，在买单时发现收银台只支持银联和visa的银行卡。这时如果你想使用一张不属于银联和visa的卡来支付

I have a web app, which allows user to upload pkcs12. I store the pkcs12 as binary in database. Is there any way for me to know if the certificate in the pkcs12 is self signed or CA signed? I am running a Java web app on tomcat and have openssl at my disposal. Edit: there are two better answers on this question today: https://stackoverflow.com/a/57927684/377270 https://stackoverflow.com/a/14515875/377270 However, I think there's something more important to address -- why would one want to know about self-signed certificates. What's the goal? What problem is being solved? Probably trying to