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PKI Lab$3 Create Single domain SSL Certificate

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來建立 PKI CA, 必需要有 Root CA, 可參考 [PKI Lab$1 Create Root CA](http://blog.pichuang.com.tw/pki-lab-1-create-root-ca/) 做建立的動作
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### Step by Step
- Setting vars for Root CA
> export KEY_SIZE=2048  
export CA_EXPIRE=365  
export KEY_EXPIRE=365  
export KEY_COUNTRY="TW"  
export KEY_PROVINCE="Taiwan"  
export KEY_CITY="HsinChu"  
export KEY_ORG="Night9 Studios"  
export KEY_EMAIL="[email protected]"  
export KEY_OU="www.night9.cc"  
export KEY_NAME=""  
export KEY_CN="roan.night9.cc"  

  - [Source](https://github.com/pichuang/easy-rsa/blob/single/vars)
  - 重點在於 ```KEY_CN```, 此設定可以 match ```roan.night9.cc```, 但不能 match ```night9.cc``` ```xxx.night9.cc

  • Create Key

    source ./vars
    ./build-key-server roan.night9.cc
    <enter>…<enter>

  • Check key and crt

    ls -la ./keys/roan.night9.cc.{key,crt}

  • Check roan.night9.cc crt Info

    openssl x509 -in roan.night9.crt -text -noout

  • Show

Reference