创建CA和证书

创建CA和证书

创建私有CA：

openssl的配置文件：/etc/pki/tls/openssl.cnf

	三种策略：match匹配、optional可选、supplied提供
	**match：要求申请填写的信息跟CA设置信息必须一致
  	optional：可有可无，跟CA设置信息可不一致
  	supplied：必须填写这项申请信息**，

1、创建所需要的文件

touch /etc/pki/CA/index.txt 生成证书索引数据库文件
echo 01 > /etc/pki/CA/serial 指定第一个颁发证书的序列号

2.CA自签证书

生成私钥
	cd /etc/pki/CA/
	(umask 066; openssl genrsa -out private/cakey.pem 2048)	

3.生成自签名证书

openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem-days 3650  -out /etc/pki/CA/cacert.pem 
 选项说明：
-new：生成新证书签署请求
-x509：专用于CA生成自签证书
-key：生成请求时用到的私钥文件
-days n：证书的有效期限
-out /PATH/TO/SOMECERTFILE: 证书的保存路径

4.颁发证书

在需要使用证书的主机生成证书请求
给web服务器生成私钥
	(umask 066; openssl genrsa –out /data/test.key 2048)
生成证书申请文件
	openssl req -new -key /data/test.key -out /data/test.csr
将证书请求文件传输给CA
CA签署证书，并将证书颁发给请求者
openssl ca -in /tmp/test.csr –out /etc/pki/CA/certs/test.crt -days 100
 **注意：默认要求 国家，省，公司名称三项必须和CA一致**
 查看证书中的信息：
	openssl x509 -in /PATH/FROM/CERT_FILE -noout -text|issuer|subject|serial|dates
	openssl ca -status SERIAL 查看指定编号的证书状态

4、吊销证书

在客户端获取要吊销的证书的serial
	openssl x509 -in /PATH/FROM/CERT_FILE -noout -serial -subject
在CA上，根据客户提交的serial与subject信息，对比检验是否与index.txt文件中的信息一致，吊销证书：
	openssl ca -revoke /etc/pki/CA/newcerts/SERIAL.pem
指定第一个吊销证书的编号,注意：第一次更新证书吊销列表前，才需要执行
	echo 01 > /etc/pki/CA/crlnumber
更新证书吊销列表
	openssl ca -gencrl -out /etc/pki/CA/crl.pem
查看crl文件：
	openssl crl -in /etc/pki/CA/crl.pem -noout -text

SHELL脚本实现OPENSS自建CA和证书申请
转自https://www.cnblogs.com/maxuebin/p/11071847.html

#!/bin/bash
#
#********************************************************************
#Author:                Ma Xue Bin                                                                                                                  
#QQ:                    316428921
#Date:                  2019-06-22

#为客户端申请证书
client(){
rpm -q expect &> /dev/null || yum install expect -y
expect <<EOF                                                                                                                                        
set timeout 10
spawn ssh $user@$ip
expect {
"yes/no" {send "yes\n";exp_continue}
"password" {send "centos\n"}
}
expect "]#" {send "yum install expect -y \n"}
expect "~]#" {send "(umask 077;openssl genrsa -out /data/$key 1024)\n"}
expect "]#" {send "openssl req -new -in /data/$key  -out /data/$csr\n"}
expect "Enter PEM pass phrase:" {send "maxuebin\n"}
expect "Verifying - Enter PEM pass phrase:" {send "maxuebin\n"}
expect ":" {send "CN\n"}
expect ":" {send "beijing\n"}
expect ":" {send "beijing\n"}
expect ":" {send "magedu\n"}
expect ":" {send "devops\n"}
expect ":" {send "www.magedu.com\n"}
expect ":" {send "[email protected]\n"}
expect ":" {send "\n"}
expect ":" {send "\n"}
expect "~]#" {send "scp /data/$csr root@$IP:/data/\n"} 
expect {
"yes/no" {send "yes\n";exp_continue}
"password" {send "centos\n"}
}
expect "#" {send "exit\n"}
expect eof
EOF
}

#服务器端自建CA
MKCA(){
rpm -q expect &> /dev/null || yum install expect -y
(umask 077;openssl genrsa -out /etc/pki/CA/private/cakey.pem 4096)
expect <<EOF
spawn openssl req -new -x509 -key /etc/pki/CA/private/cakey.pem -out /etc/pki/CA/cacert.pem -days 3650 
expect ":" {send "CN\n"}
expect ":" {send "beijing\n"}
expect ":" {send "beijing\n"}
expect ":" {send "magedu\n"}
expect ":" {send "devops\n"}
expect ":" {send "ca.magedu.com\n"}
expect ":" {send "[email protected]\n"}
expect eof
EOF
[ -f /etc/pki/CA/index.txt ] || touch /etc/pki/CA/index.txt
[ -f /etc/pki/CA/serial ] || echo 01 > /etc/pki/CA/serial
}

#服务器端签署证书                             
certificate(){
if [ -f /data/$csr ];then 
cer=`echo $csr |cut -d. -f1`
expect <<EOF
spawn openssl ca -in /data/$csr -out /etc/pki/CA/certs/$cer.crt -days 100
expect "]:" {send "y\n"}
expect "]" {send "y\n"}
expect eof
EOF
fi
}






user=root
ip=192.168.1.110
IP=192.168.1.108
key=app.key
csr=app.csr
while true;do
cat <<EOF
自建CA 
签署证书
为客户端申请证书
自动化自建CA并让客户端申请证书并签证
退出
EOF                                             
read -p "plese input number: " number
case $number in
1)
        MKCA
        ;;
2)
        certificate
        ;;
3)
        client
        ;;
4)
        client
        MKCA
        certificate
        ;;
5)
        exit
        ;;
*)
        echo "please input a valid arguments"
        ;;
esac
done