Let's EncryptのSSL証明書で、Qualys SSLTestでA+評価を獲得するには ref: http://qiita.com/dseg/items/bab80f6f14349fcd9c22

ct-submit.sh

#!/bin/sh
# Let's encryptから入手した fullchain.pem の場所
KEY=/etc/letsencrypt/live/shield.jp/fullchain.pem
# CT情報の保存先
SCTS_DIR=/etc/letsencrypt/live/shield.jp/scts
# ct-submitコマンド
CTSUBMIT=/usr/local/bin/ct-submit

echo 1
sudo sh -c "$CTSUBMIT ct.googleapis.com/aviator \
<$KEY \
>$SCTS_DIR/aviator.sct"
echo 2
sudo sh -c "$CTSUBMIT ct.googleapis.com/pilot \
<$KEY \
>$SCTS_DIR/pilot.sct"
echo 3
sudo sh -c "$CTSUBMIT ct.googleapis.com/rocketeer \
<$KEY \
>$SCTS_DIR/rocketeer.sct"
#echo 4
#sudo sh -c "$CTSUBMIT ct1.digicert-ct.com/log \
#<$KEY \
#>$SCTS_DIR/digicert.sct"
#echo 5
#sudo sh -c "$CTSUBMIT ct.izenpe.com \
#<$KEY \
#>$SCTS_DIR/izenpe.sct"
#echo 6
#sudo sh -c "$CTSUBMIT log.certly.io \
#<$KEY \
#>$SCTS_DIR/certly.sct"

file1.txt

# DHPARAMの生成
sudo openssl dhparam -out /etc/ssl/private/dhparams_4096.pem 4096

file11.txt

sudo ls -al /etc/letsencrypt/live/shield.jp/scts
total 20
drwxr-xr-x 2 root root 4096 Nov 12 16:54 .
drwxr-xr-x 3 root root 4096 Nov 12 17:46 ..
-rw-r--r-- 1 root root  118 Nov 12 16:54 aviator.sct
-rw-r--r-- 1 root root  119 Nov 12 16:54 pilot.sct
-rw-r--r-- 1 root root  118 Nov 12 16:54 rocketeer.sct

file5.txt

Public-Key-Pins: pin-sha256="base64=="; max-age=expireTime [; includeSubdomains][; report-uri="reportURI"]

file6.txt

# メインの鍵の情報を取り出して、Base64符号化
sudo openssl x509 -noout -in /etc/letsencrypt/live/shield.jp/chain.pem -pubkey | \
  openssl pkey -pubin -outform der |\
  openssl dgst -sha256 -binary |\
  base64

# バックアップ鍵の生成
sudo openssl genrsa -out /etc/letsencrypt/live/shield.jp/hpkp-backup.key 4096
sudo openssl req -new -key /etc/letsencrypt/live/shield.jp/hpkp-backup.key -sha256 -out /etc/letsencrypt/live/shield.jp/hpkp-backup.csr

# バックアップ鍵の情報を取り出して、Base64符号化
sudo openssl req -pubkey < /etc/letsencrypt/live/shield.jp/hpkp-backup.csr | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | base64

file7.txt

  listen       443 ssl;
  server_name  shield.jp;

 ssl_certificate /etc/letsencrypt/live/shield.jp/fullchain.pem;
 ssl_certificate_key /etc/letsencrypt/live/shield.jp/privkey.pem;

  ssl_session_cache   shared:SSL:3m;
  ssl_buffer_size     8k;
  ssl_session_timeout 10m;

#    ssl_ciphers  HIGH:!aNULL:!MD5;
  ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
  ssl_prefer_server_ciphers  on;

  # 証明書透かし (Certificate Transparency)設定
  ssl_ct on;
  ssl_ct_static_scts /etc/letsencrypt/live/shield.jp/scts;

  # Logjam攻撃対策
  ssl_dhparam /etc/ssl/private/dhparam_4096.pem;

  # Enable OCSP (Online Certificate Status Protocol) Stapling
  ssl_stapling on;
  ssl_stapling_verify on;
  resolver 8.8.4.4 8.8.8.8 valid=300s;
  resolver_timeout 10s;

  # Enable HSTS (HTTP Strict Transport Security)
  add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";

  # HPKP Settings
  add_header Public-Key-Pins 'pin-sha256="YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg="; pin-sha256="GO8LTsdpBf/sLaUQ3/NPVCaGzZOmku+6iIBdeef9K2k="; max-age=2592000; includeSubDomains';

  # 後略

file8.txt

# nginx-ctプラグインのダウンロード
cd /tmp
wget https://github.com/grahamedgecombe/nginx-ct/archive/master.zip
unzip master.zip

# nginx-ctプラグインを有効化してNginxを再ビルド (OpenSSL 1.0.2以降も必要)
cd /usr/local/src/nginx-1.9.3
./configure --add-module=/tmp/nginx-ct-master --with-http_ssl_module  --with-openssl=/usr/local/src/openssl-1.0.2d
make clean
make
sudo make install

file9.txt

cd /tmp
wget https://github.com/grahamedgecombe/ct-submit/archive/master.zip
unzip master.zip
cd ct-submit-master
go build
sudo install -s -m755 ./ct-submit-master /usr/local/bin/ct-submit

nginx.conf

    #
    # HTTPS server
    #
    server {

      listen       443 ssl http2; # HTTP/2パッチを当てているため。通常は http2 は不要
      server_name  shield.jp;

      ssl_certificate /etc/letsencrypt/live/shield.jp/fullchain.pem;
      ssl_certificate_key /etc/letsencrypt/live/shield.jp/privkey.pem;

      ssl_session_cache   shared:SSL:3m;
      ssl_buffer_size     8k;
      ssl_session_timeout 10m;

      # 1. 暗号方式の設定
      # (デフォルト) ssl_ciphers  HIGH:!aNULL:!MD5;
      ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
      ssl_prefer_server_ciphers  on;

      # 2. Logjam攻撃対策
      ssl_dhparam /etc/ssl/private/dhparam_4096.pem;

      # 3. Enable OCSP (Online Certificate Status Protocol) Stapling
      ssl_stapling on;
      ssl_stapling_verify on;
      resolver 8.8.4.4 8.8.8.8 valid=300s;
      resolver_timeout 10s;

      # 4. Enable HSTS (HTTP Strict Transport Security)
      add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";

      # 5. HPKP Settings
      add_header Public-Key-Pins 'pin-sha256="YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg="; pin-sha256="GO8LTsdpBf/sLaUQ3/NPVCaGzZOmku+6iIBdeef9K2k="; max-age=2592000; includeSubDomains';

      # 6.証明書透かし (Certificate Transparency)設定
      ssl_ct on;
      ssl_ct_static_scts /etc/letsencrypt/live/shield.jp/scts;

      # 後略
}