证书创建三步曲：
一、密钥文件
二、请求文
三、根证书签名
最后看需要是否合并证书文件
1. 创立根证书密钥文件(自己做CA)root.key：
[kk@test ~]$ openssl genrsa -des3 -out root.key
Generating RSA private key, 512 bit long modulus
……………..++++++++++++
..++++++++++++
e is 65537 (0×10001)
Enter pass phrase for root.key: ← 输入一个新密码
Verifying – Enter pass phrase for root.key: ← 重新输入一遍密码
2. 创立根证书的申请文件root.csr：
[kk@test ~]$ openssl req -new -key root.key -out root.csr
Enter pass phrase for root.key: ← 输入前面创立的密码
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 ‘.whflsc.com’, the field will be left blank.
—–
Country Name (2 letter code) [AU]:CN ← 国度代号，中国输入CN
State or Province Name (full name) [Some-State]:BeiJing ← 省的全名，拼音
Locality Name (eg, city) []:BeiJing ← 市的全名，拼音
Organization Name (eg, company) [Internet Widgits Pty Ltd]:MyCompany Corp. ← 公司英文名
Organizational Unit Name (eg, section) []: ← 能够不输入
Common Name (eg, YOUR name) []: ← 此刻不输入
Email Address []:admin@mycompany.com ← 电子邮箱，可容易填
Please enter the following ‘extra’ attributes
to be sent with your certificate request
A challenge password []: ← 能够不输入
An optional company name []: ← 能够不输入
3. 创立一个自目前日期起为期十年的根证书root.crt：
[kk@test ~]$ openssl x509 -req -days 3650 -sha1 -extensions v3_ca -signkey root.key -in root.csr -out root.crt
Signature ok
subject=/C=CN/ST=BeiJing/L=BeiJing/O=MyCompany Corp./emailAddress=admin@mycompany.com
Getting Private key
Enter pass phrase for root.key: ← 输入前面创立的密码
4. 创立服务器证书密钥server.key：
[kk@test ~]$ openssl genrsa -out server.key 2048
Generating RSA private key, 2048 bit long modulus
….+++
…………………………………………..+++
e is 65537 (0×10001)
5.创立服务器证书的申请文件server.csr：
[kk@test ~]$ openssl req -new -key server.key -out server.csr
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) [AU]:CN ← 国度名目，中国输入CN
State or Province Name (full name) [Some-State]:BeiJing ← 省名，拼音
Locality Name (eg, city) []:BeiJing ← 市名，拼音
Organization Name (eg, company) [Internet Widgits Pty Ltd]:MyCompany Corp. ← 公司英文名
Organizational Unit Name (eg, section) []: ← 能够不输入
Common Name (eg, YOUR name) []:om ← 服务器主机名，若填写不准确，博览器会报告证书无效，但并不波及利用
Email Address []:admin@mycompany.com ← 电子邮箱，可容易填
Please enter the following ‘extra’ attributes
to be sent with your certificate request
A challenge password []: ← 能够不输入
An optional company name []: ← 能够不输入
6. 创立自目前日期起管用期为期两年的服务器证书server.crt：
[kk@test ~]$ openssl x509 -req -days 730 -sha1 -extensions v3_req -CA root.crt -CAkey root.key -CAcreateserial -in server.csr -out server.crt
Signature ok
subject=/C=CN/ST=BeiJing/L=BeiJing/O=MyCompany Corp./CN=om/emailAddress=admin@mycompany.com
Getting CA Private Key
Enter pass phrase for root.key: ← 输入前面创立的密码
7. 将server.crt和书密钥文件server.key并合成证书安装包server.pfx：
[kk@test ~]$ openssl pkcs12 -export -in server.crt -inkey server.key -out server.pfx
Enter pass phrase for server.key: ← 输入上面创立的密码
Enter Export Password: ← 输入一个新的密码，用作客户端证书的防御密码，在客户端安装证书时必需输入此密码
Verifying – Enter Export Password: ← 确认密码