一、基于easy_rsa 2.x制作证书：

链接：https://blog.51cto.com/wzlinux/1736459  最后附录部分。

下载密钥制作工具easy_rsa 2：

wget https://github.com/Open×××/easy-rsa/archive/release/2.x.zip

解压easy_rsa并拷贝到/etc/open***：

unzip 2.x.zip

mv easy-rsa-release-2.x/ /etc/open***/

编辑easy-rsa的vars文件，设定相关变量信息：

cd /etc/open***/easy-rsa-release-2.x/easy-rsa/2.0

vim vars

export KEY_COUNTRY="CN"

export KEY_PROVINCE="Beijing"

export KEY_CITY="Beijing"

export KEY_ORG="APICloud"

export KEY_EMAIL="ADMIN@APICloud.COM"

export KEY_OU="***.apicloud.com"

编辑完之后，保存退出。

将刚才编辑的vars文件，执行如下命令：

source vars

./clean-all

./build-ca

创建服务器的证书和密钥：

./build-key-server Open×××_Server

[root@cloud 2.0]# ./build-key-server Open×××_Server

Generating a 2048 bit RSA private key

.................................+++

............+++

writing new private key to 'Open×××_Server.key'

-----

You are about to be asked to enter information that will be incorporated

into your certificate request.

What you are about to enter is what is called a Distinguished Name or a DN.

There are quite a few fields but you can leave some blank

For some fields there will be a default value,

If you enter '.', the field will be left blank.

-----

Country Name (2 letter code) [CN]:

State or Province Name (full name) [BEIJING]:

Locality Name (eg, city) [BEIJING]:

Organization Name (eg, company) [XIAOCUI]:

Organizational Unit Name (eg, section) [MyOpen×××]:

Common Name (eg, your name or your server's hostname) [Open×××_Server]:

Name [EasyRSA]:

Email Address [ADMIN@ XIAOCUI.COM]:

Please enter the following 'extra' attributes

to be sent with your certificate request

A challenge password []:

An optional company name []:

Using configuration from /etc/open***/easy-rsa-release-2.x/easy-rsa/2.0/openssl-1.0.0.cnf

Check that the request matches the signature

Signature ok

The Subject's Distinguished Name is as follows

countryName           :PRINTABLE:'CN'

stateOrProvinceName   :PRINTABLE:'BEIJING'

localityName          :PRINTABLE:'BEIJING'

organizationName      :PRINTABLE:' XIAOCUI '

organizationalUnitName:PRINTABLE:'MyOpen×××'

commonName            :T61STRING:'Open×××_Server'

name                  :PRINTABLE:'EasyRSA'

emailAddress          :IA5STRING:'ADMIN@ XIAOCUI.COM'

Certificate is to be certified until May  2 07:49:13 2025 GMT (3650 days)

Sign the certificate? [y/n]:y

1 out of 1 certificate requests certified, commit? [y/n]y

Write out database with 1 new entries

Data Base Updated

创建客户端的证书和密钥：

./build-key client-user-test1

[root@cloud 2.0]# ./build-key client-user-test1

Generating a 2048 bit RSA private key

....................+++

...............................................................................+++

writing new private key to 'client-user-cuiyuanrong.key'

-----

You are about to be asked to enter information that will be incorporated

into your certificate request.

What you are about to enter is what is called a Distinguished Name or a DN.

There are quite a few fields but you can leave some blank

For some fields there will be a default value,

If you enter '.', the field will be left blank.

-----

Country Name (2 letter code) [CN]:

State or Province Name (full name) [BEIJING]:

Locality Name (eg, city) [BEIJING]:

Organization Name (eg, company) [XIAOCUI]:

Organizational Unit Name (eg, section) [MyOpen×××]:

Common Name (eg, your name or your server's hostname) [client-user-test1]:

Name [EasyRSA]:

Email Address [ADMIN@XIAOCUI.COM]:

Please enter the following 'extra' attributes

to be sent with your certificate request

A challenge password []:

An optional company name []:

Using configuration from /etc/open***/easy-rsa-release-2.x/easy-rsa/2.0/openssl-1.0.0.cnf

Check that the request matches the signature

Signature ok

The Subject's Distinguished Name is as follows

countryName           :PRINTABLE:'CN'

stateOrProvinceName   :PRINTABLE:'BEIJING'

localityName          :PRINTABLE:'BEIJING'

organizationName      :PRINTABLE:'XIAOCUI'

organizationalUnitName:PRINTABLE:'MyOpen×××'

commonName            :PRINTABLE:'client-user-test1'

name                  :PRINTABLE:'EasyRSA'

emailAddress          :IA5STRING:'ADMIN@XIAOCUI.COM'

Certificate is to be certified until May  2 07:53:17 2025 GMT (3650 days)

Sign the certificate? [y/n]:y

1 out of 1 certificate requests certified, commit? [y/n]y

Write out database with 1 new entries

Data Base Updated

创建Diffie Hellman 参数：

./build-dh

二、基于easy_rsa 3.x制作证书：

链接：http://openwrt.iteye.com/blog/2305318

最近研究如何在路由器上面实现open***的功能，其中便涉及到使用easyrsa来制作证书的问题，针对最新的open***-2.3.11源码包,easyrsa已经不包含在里面，需要单独下载，下载网址为https://github.com/Open×××/easy-rsa，下载下来是一个easy-rsa-master.zip压缩包，已上传为附件，在linux上面将其解压得到easy-rsa-master，进入easyrsa3，将vars.example复制一份命名为vars，此文件为制作证书时所使用到的配置文件，根据我的需要，我只打开了如下选项：

set_var EASYRSA_DN  "org"

set_var EASYRSA_REQ_COUNTRY "CN"

set_var EASYRSA_REQ_PROVINCE    "Guangdong"

set_var EASYRSA_REQ_CITY    "Shenzhen"

set_var EASYRSA_REQ_ORG "XXX"

set_var EASYRSA_REQ_EMAIL   "me@myhost.mydomain"

/*************************************/

如果open*** client的配置文件中使用了ns-cert-type server则要打开此选项，制作server证书时会将一些信息写入证书，如不打开此选项，则open*** client会提示server certificate verify fail

set_var EASYRSA_NS_SUPPORT  "yes"

/*************************************/

下面就可以制作证书了，每条命令执行之后都有些信息输出，如出错，会提示相关错误信息

1 ./easyrsa init-pki

初始化，会在当前目录创建PKI目录，用于存储一些中间变量及最终生成的证书

2 ./easyrsa build-ca

创建根证书，首先会提示设置密码，用于ca对之后生成的server和client证书签名时使用，然后会提示设置Country Name，State or Province Name，Locality Name，Organization Name，Organizational Unit Name，Common Name，Email Address，可以键入回车使用默认的，也可以手动更改

3 ./easyrsa gen-req server nopass

创建server端证书和private key，nopass表示不加密private key，然后会提示设置Country Name，State or Province Name，Locality Name，Organization Name，Organizational Unit Name，Common Name，Email Address，可以键入回车使用默认的，也可以手动更改

4 ./easyrsa sign server server

给server端证书做签名，首先是对一些信息的确认，可以输入yes，然后输入build-ca时设置的那个密码

5 ./easyrsa gen-dh

创建Diffie-Hellman，时间会有点长，耐心等待

6 创建client端证书，需要单独把easyrsa3文件夹拷贝出来一份，删除里面的PKI目录，然后进入到此目录

./easyrsa init-pki

初始化，会在当前目录创建PKI目录，用于存储一些中间变量及最终生成的证书

7 ./easyrsa gen-req client nopass

创建client端证书和private key，nopass表示不加密private key，然后会提示设置Country Name，State or Province Name，Locality Name，Organization Name，Organizational Unit Name，Common Name，Email Address，可以键入回车使用默认的，也可以手动更改

8 回到制作server证书时的那个easyrsa3目录，导入client端证书，准备签名

./easyrsa import-req client.req所在路径 client

client.req应该在刚才制作client端证书的easyrsa3/pki/reqs/下面

9 ./easyrsa sign client client

给client端证书做签名，首先是对一些信息的确认，可以输入yes，然后输入build-ca时设置的那个密码

注意：ca、server和client的Common Name最好不要设置为一样，我没有验证，不过网上有人说设置一样后，open***连接时会有问题

至此，server和client端证书已制作完毕

open*** server端需要的是

easyrsa3/pki/ca.crt   <制作server证书的文件夹>

easyrsa3/pki/private/server.key <制作server证书的文件夹>

easyrsa3/pki/issued/server.crt <制作server证书的文件夹>

easyrsa3/pki/dh.pem

open*** client端需要的是

easy-rsa/easyrsa3/pki/ca.crt <制作server证书的文件夹>

easy-rsa/easyrsa3/pki/issued/client.crt <制作server证书的文件夹>

easy-rsa/easyrsa3/pki/private/client.key <制作client证书的文件夹>