设置CA证书来强化PostgreSQL的安全性的教程

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

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

# 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

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'

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

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

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

sudo service postgresql restart

mkdir ~/.postgresql
cp /etc/ssl/certs/trustly-postgresql.pem ~/.postgresql/root.crt

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

# 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