CentOS 7 搭建CA认证中心实现https取证

CA认证中心简述

CA ：CertificateAuthority的缩写，通常翻译成认证权威或者认证中心，主要用途是为用户发放数字证书

功能：证书发放、证书更新、证书撤销和证书验证。

作用：身份认证，数据的不可否认性

端口：443

证书请求文件:CSR是Cerificate Signing Request的英文缩写，即证书请求文件，也就是证书申请者在申请数字证书时由CSP(加密服务提供者)在生成私钥的同时也生成证书请求文件，证书申请者只要把CSR文件提交给证书颁发机构后，证书颁发机构使用其根证书的私钥签名就生成了证书文件，也就是颁发给用户的证书

一：搭建CA认证中心

配置一个自己的CA认证中心

[root@ca ~]# vim /etc/pki/tls/openssl.cnf +
basicConstraints=CA:FALSE 　　# 把FALSE改成TRUE 把本机变成CA认证中心

配置认证中心，生成私钥与根证书

[root@ca ~]# /etc/pki/tls/misc/CA -newca

这里配置了CA认证中心 ，在里面就生成了CA认证根证书的私钥 ，在配置完结束之后 ，就会生成一个根证书，这个根证书中有这证书的公钥

到此CA认证中心就搭建好了

查看生成的CA根证书 ：

[root@ca ~]# vim /etc/pki/CA/cacert.pem
Certificate:
    Data:
        Version:  (0x2)
        Serial Number:
            d5:bc:ed::bb:7c:a9:3b
    Signature Algorithm: sha256WithRSAEncryption
        Issuer: C=CN, ST=beijing, O=IT, OU=IT-OPS, CN=damowang.cn/emailAddress=[e-mail]
       # 上面是CA认证中心信息
　　　　 Validity　　
            Not Before: Aug   ::  GMT
            Not After : Aug   ::  GMT
        Subject: C=CN, ST=beijing, O=IT, OU=IT-OPS, CN=damowang.cn/emailAddress=[e-mail]
Subject Public Key Info:　　# CA认证中心公钥信息
            Public Key Algorithm: rsaEncryption
                Public-Key: ( bit)
                Modulus:
                    :bc:f2:4e:b3:ac:cf:ec:c7:6c:9a:7f::8f:ab:
                    bc:b0:2f:b6::a7:cd:::a6::f3::3a::
                    8c:d5:::3a:::da:9f:ae:5d:b0:c1::3e:
                    8f:9e:::2b::b5::d3:8e:c0:de::7d:e2:
                    :::6c:bf:b2::dc:::b0:a5:2e::a4:
                    ::::6e:df:f7:8e:3a:d5:ab:df:cb:5b::
                    ee:a4:e9:e6:6c:ae:::d2:a0::db:b7:::
                    f5:0e::3f:8c:a6:e8::5b:a1::da:1a:ec::
                    :::::9e:dd:f0:3e::ea:a1:ff:::
                    c0:b1:::5f::6e::c4:8d:e5:a2:b4::ff:
                    6d:b3:2b:db:::fa:a6::d5::ec:ba::d4:
                    f3:::e9::c0:ba:f4:5b::e5:f5:f7:::
                    dc::bc::6b:2b:0e:::::3c:2a::a0:
                    ::::af:ee::d5:3b::cc::cd:b2:ab:
                    fa::5d::eb:8a:e5:3c::a2:3b:e3:8b:d0::
                    6e:::0d:dd:6b::e4:::5d:bc::da:4b:
                    4f:d2:c8:::c6:c3:b8:b5:eb:e3:ff::f5::
                    :ed
                Exponent:  (0x10001)
        X509v3 extensions:
            X509v3 Subject Key Identifier:
                ::C9:B3:C1:BF:F9:4D:D4:::BC:9B:A5:C0:CC:6B:D9:5D:BD
            X509v3 Authority Key Identifier:
                keyid:::C9:B3:C1:BF:F9:4D:D4:::BC:9B:A5:C0:CC:6B:D9:5D:BD

            X509v3 Basic Constraints:
                CA:TRUE
    Signature Algorithm: sha256WithRSAEncryption
         :f7::3b:::::2e:ad:f6:af::4c:8b::ac::
         :8d::8b::6a:b8:1e::b0:5d:c1:ee:d2:c6:a6:1e::
         4d::b6::2e:c3::a4:f0:f9:9e:d4:2f:c2::::5e:
         b3::::b4::1f:3d:cb:d7:2f:f8::6e:a5:8a:e6:f6:
         8f::aa:4b:9a::b5:0e:db:::0b:8a:9b:2b::6d::
         c0::8f:cd:::::d5:4f:4f:8e:eb:7a::2c:::
         8e::1c::3a:e8::b4:2e::4a:a4::1a::8d::d9:
         b5:6e::::::::a4:ac:1b::dd:::6f:8b:
         a9:ff:d4:d2:7e:9c:8f:4a:c7::e7::2b::::5f::
         6c::2d:b5:a7:1d:0c:f1:a2:d8::2c::::3c::9c:
         :d4:1a:d1:7b:a3:7f:f6:::e3::f1:7e:::af::
         2b::6d:cb:af:d0::ad:e4::1c:ee:b9::d8::::
         7b::ba::ac::f1::c0::2e:::dd::7b::8f:
         ::::b3:a4:::b9::ef:0b::7f:::bf:2f:
         ::9b:d6
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----                                       

查看根证书的私钥 :

[root@ca ~]# vim /etc/pki/CA/private/cakey.pem    # CA认证下根证书的私钥
-----BEGIN ENCRYPTED PRIVATE KEY-----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-----END ENCRYPTED PRIVATE KEY-----

二：使用证书搭建https

1、安装httpd :

[root@client ~]# yum -y install httpd
[root@client ~]# vim /etc/httpd/conf/httpd.conf
// 把 #ServerName www.example.com:80 改成 ServerName 192.168.94.111:80
[root@client ~]# systemctl start httpd

2、client 生成证书请求文件

生一个私钥密钥 ：

[root@client ~]# openssl genrsa -des3 -out /etc/httpd/conf.d/server.key

生成请求文件 :

[root@client ~]# openssl req -new -key /etc/httpd/conf.d/server.key -out /server.csr    
# 注意后期添加的国家，省，城市等信息要和CA保持一致

3、将证书请求文件发给CA服务器：

[root@client ~]# scp /server.csr 192.168.94.22:/tmp/

4、CA认证中心进行CA签名

[root@ca ~]#  openssl ca -keyfile /etc/pki/CA/private/cakey.pem -cert /etc/pki/CA/cacert.pem -in /tmp/server.csr -out /server.crt

这里的认证中心进行的签名是用自己的私钥进行签名

5、CA认证中心进行颁发证书

在颁发之前，CA认证中心会使用自己的公钥进行加密

[root@ca ~]# scp /server.crt 192.168.94.111:/

三：使用证书实现https

SSL：(Secure Socket Layer)安全套接字层，通过一种机制在互联网上提供密钥传输 其主要目标是保证两个应用间通信数据的保密性和可靠性,可在服务器端和用户端同时支持的一种加密算法 目前主流版本SSLV2、SSLV3(常用）。

SSL四次握手安全传输：

加密协议： SSL 3.0 或 TLS 1.0

C -------------------------------------------------> S  . 请求一个安全的会话，协商算法

C <------------------------------------------------- S  . 将自己Server端的证书给客户端，证书中包括了64自己的公钥

C -------------------------------------------------> S  . 客户端用浏览器中存放CA的根证书检测client证书，如果对，使用CA根证书中的公钥解密 得到CA的公钥； 然后生成一把对称的加密密钥,用client的公钥加密这个密钥发给CA , 后期使用对称密钥加密数据

C <------------------------------------------------> S  .client使用私钥解密，得到对称的加密密钥然后，使用对称加密密钥来进行安全快速传输数据

1、配置HTTPSweb服务器

[root@client ~]# yum -y install mod_ssl    # 安装SSL模块
[root@client ~]# cp /server.crt /etc/httpd/conf.d/    # 复制证书
[root@client ~]# vim /etc/httpd/conf.d/ssl.conf
# SSLCertificateFile /etc/pki/tls/certs/localhost.crt 把路径改成/etc/httpd/conf.d/server.crt
# SSLCertificateKeyFile /etc/pki/tls/private/localhost.key 把路径改成/etc/httpd/conf.d/server.key
[root@client ~]# systemctl restart httpd
Enter SSL pass phrase for 192.168.94.111: (RSA) : ******   # 私钥密码 

测试 :

[root@client ~]# netstat -antup | grep
tcp6              :::                  :::*                    LISTEN      /httpd   

访问https://192.168.94.111

到这就已经认证成功了 但是没有被信任

查看一下证书

因为之前填写Common Name 是www.damowang.cn的域名

修改物理机hosts文件

192.168.94.111 www.damowang.cn 

重新用域名访问应该就可以被信任了