这篇文章主要介绍“如何设置CA证书来强化PostgreSQL的安全性”，在日常操作中，相信很多人在如何设置CA证书来强化PostgreSQL的安全性问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”如何设置CA证书来强化PostgreSQL的安全性”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
设置CA
CA应该是一台离线的处于高度安全环境中的计算机。
生成CA私钥
sudo openssl genrsa -des3 -out /etc/ssl/private/trustly-ca.key 2048
sudo chown root:ssl-cert /etc/ssl/private/trustly-ca.key
sudo chmod 640 /etc/ssl/private/trustly-ca.key
生成CA证书
sudo openssl req -new -x509 -days 3650 \
-subj '/C=SE/ST=Stockholm/L=Stockholm/O=Trustly/CN=trustly' \
-key /etc/ssl/private/trustly-ca.key \
-out /usr/local/share/ca-certificates/trustly-ca.crt
sudo update-ca-certificates
配置PostgreSQL服务器
生成PostgreSQL服务器私钥
# Remove default snakeoil certs
sudo rm /var/lib/postgresql/9.1/main/server.key
sudo rm /var/lib/postgresql/9.1/main/server.crt
# Enter a passphrase
sudo -u postgres openssl genrsa -des3 -out /var/lib/postgresql/9.1/main/server.key 2048
# Remove the passphrase
sudo -u postgres openssl rsa -in /var/lib/postgresql/9.1/main/server.key -out /var/lib/postgresql/9.1/main/server.key
sudo -u postgres chmod 400 /var/lib/postgresql/9.1/main/server.key
生成PostgreSQL服务器证书签署请求(CSR)
sudo -u postgres openssl req -new -nodes -key /var/lib/postgresql/9.1/main/server.key -days 3650 -out /tmp/server.csr -subj '/C=SE/ST=Stockholm/L=Stockholm/O=Trustly/CN=postgres'
用CA私钥签署PostgreSQL服务器证书请求
sudo openssl req -x509 \
-key /etc/ssl/private/trustly-ca.key \
-in /tmp/server.csr \
-out /var/lib/postgresql/9.1/main/server.crt
sudo chown postgres:postgres /var/lib/postgresql/9.1/main/server.crt
创建根(root)证书=PostgreSQL服务器证书+CA证书
sudo -u postgres sh -c 'cat /var/lib/postgresql/9.1/main/server.crt /etc/ssl/certs/trustly-ca.pem > /var/lib/postgresql/9.1/main/root.crt'
sudo cp /var/lib/postgresql/9.1/main/root.crt /usr/local/share/ca-certificates/trustly-postgresql.crt
sudo update-ca-certificates
授权访问
CREATE GROUP sslcertusers;
ALTER GROUP sslcertusers ADD USER joel;
# /etc/postgresql/9.1/main/pg_hba.conf:
hostssl nameofdatabase +sslcertusers 192.168.1.0/24 cert clientcert=1
重启PostgreSQL
sudo service postgresql restart
PostgreSQL客户端设置
从PostgreSQL服务器上复制根证书
mkdir ~/.postgresql
cp /etc/ssl/certs/trustly-postgresql.pem ~/.postgresql/root.crt
生成PostgreSQL客户端私钥
openssl genrsa -des3 -out ~/.postgresql/postgresql.key 1024
# If this is a server, remove the passphrase:
openssl rsa -in ~/.postgresql/postgresql.key -out ~/.postgresql/postgresql.key
生成PostgreSQL客户端证书签署请求并签署
# Replace "joel" with username:
openssl req -new -key ~/.postgresql/postgresql.key -out ~/.postgresql/postgresql.csr -subj '/C=SE/ST=Stockholm/L=Stockholm/O=Trustly/CN=joel'
sudo openssl x509 -req -in ~/.postgresql/postgresql.csr -CA /etc/ssl/certs/trustly-ca.pem -CAkey /etc/ssl/private/trustly-ca.key -out ~/.postgresql/postgresql.crt -CAcreateserial
sudo chown joel:joel -R ~/.postgresql
sudo chmod 400 -R ~/.postgresql/postgresql.key
到此，关于“如何设置CA证书来强化PostgreSQL的安全性”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注天达云网站，小编会继续努力为大家带来更多实用的文章！