WindowsサーバのIISにLet’s Encryptで取得したワイルドカードSSL証明書をインポートする方法を調べたのでまとめした。
いろいろと試行錯誤したのですが、どうやらIISに対してSSL証明書を登録するためには、IISからCSRを作成する必要があるようです。しかし、Let’s Encryptを用いてSSL証明書を取得する場合、どのようなCSRで証明書を取得しているのかわかりません。その結果、IISにSSL証明書を登録することができません。
この問題を解決するために、PKISharp/win-acmeを利用します。このツールを利用することで、IISに自動的にLet’s Encryptから取得したSSL証明書を登録することができます。
PKISharp/win-acmeをダウンロード後、以下のように操作することでワイルドカードSSL証明書をIISに登録できました。
なお、手動でDNSにtxtレコードを登録、削除を間に挟んでいることに注意ください。
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| C:\Users\Administrator\Desktop\win-acme.v2.0.3.206>wacs.exe
[INFO] A simple Windows ACMEv2 client (WACS)
[INFO] Software version 2.0.3.206 (RELEASE)
[INFO] IIS version 10.0
[INFO] Please report issues at https://github.com/PKISharp/win-acme
N: Create new certificate
M: Create new certificate with advanced options
L: List scheduled renewals
R: Renew scheduled
S: Renew specific
A: Renew *all*
O: More options...
Q: Quit
Please choose from the menu: M
[INFO] Running in mode: Interactive, Advanced
1: Single binding of an IIS site
2: SAN certificate for all bindings of an IIS site
3: SAN certificate for all bindings of multiple IIS sites
4: Manually input host names
<Enter>:
Which kind of certificate would you like to create?: 4
Enter comma-separated list of host names, starting with the common name: *.holiday88sg.com
[INFO] Target generated using plugin Manual: *.holiday88sg.com
Suggested FriendlyName is '[Manual] *.holiday88sg.com', press enter to accept or type an alternative: <Enter>
1: [dns-01] CNAME the record to a server that supports the acme-dns API
2: [dns-01] Manually create record
3: [dns-01] Run script to create and update records
<Enter>: Abort
How would you like to validate this certificate?: 2
1: Elliptic Curve key
2: Standard RSA key pair
What kind of CSR would you like to create?: 2
1: IIS Central Certificate Store
2: Windows Certificate Store
3: Write .pem files to folder (Apache, ngnix, etc.)
How would you like to store this certificate?: 2
1: Create or update https bindings in IIS
2: Do not run any installation steps
3: Run a custom script
C: Abort
Which installer should run for the certificate?: 2
[INFO] Authorize identifier: xxx.com
[INFO] Authorizing xxx.com using dns-01 validation (Manual)
Domain: xxx.com
Record: _acme-challenge.xxx.com
Type: TXT
Content: "2n6Q9rawV9C1sCAzVhpIQqpgJh1EtSDMIaz2zYus7sc"
Note 1: Some DNS control panels add quotes automatically. Only one set is required.
Note 2: Make sure your name servers are synchronised, this may take several minutes!
Please press enter after you've created and verified the record
[INFO] Answer should now be available at _acme-challenge.xxx.com
[WARN] Preliminary validation failed, found (null) instead of 2n6Q9rawV9C1sCAzVhpIQqpgJh1EtSDMIaz2zYus7sc
[INFO] Authorization result: valid
Domain: xxx.com
Record: _acme-challenge.xxx.com
Type: TXT
Content: "2n6Q9rawV9C1sCAzVhpIQqpgJh1EtSDMIaz2zYus7sc"
Please press enter after you've deleted the record
[INFO] Requesting certificate [Manual] *.xxx.com
[INFO] Installing certificate in the certificate store
[INFO] Adding certificate [Manual] *.xxx.com 2019/5/11 8:06:48 to store WebHosting
[INFO] Installing with None...
Do you want to replace the existing task? (y/n*) - yes
[INFO] Deleting existing task win-acme renew (acme-v02.api.letsencrypt.org) from Windows Task Scheduler.
[INFO] Adding Task Scheduler entry with the following settings
[INFO] - Name win-acme renew (acme-v02.api.letsencrypt.org)
[INFO] - Path C:\Users\Administrator\Desktop\win-acme.v2.0.3.206
[INFO] - Command wacs.exe --renew --baseuri "https://acme-v02.api.letsencrypt.org/"
[INFO] - Start at 09:00:00
[INFO] - Time limit 02:00:00
Do you want to specify the user the task will run as? (y/n*) - yes
Enter the username (Domain\username): Administrator
Enter the user's password: *********
[INFO] Adding renewal for [Manual] *.holiday88sg.com
[INFO] Next renewal scheduled at 2019/7/5 8:06:48
N: Create new certificate
M: Create new certificate with advanced options
L: List scheduled renewals
R: Renew scheduled
S: Renew specific
A: Renew *all*
O: More options...
Q: Quit
Please choose from the menu: q
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