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HOWTO: Verify ssl cert and get info

Get full info

true | openssl s_client -connect -showcerts

Just verify

true | openssl s_client -connect -showcerts >/dev/null

Thanks -

HOWTO: Generate Wildcard SSL Certificate

openssl req -new -newkey rsa:2048 -nodes -out star_bloggs_com.csr -keyout star_bloggs_com.key -subj "/C=GB/ST=Kent/L=Folkestone/O=Bloggs Ltd/OU=IT/CN=*"

HOWTO: Check Details Of SSL Certificate Signing Request

openssl req -text -noout -verify -in domain_com.csr

Thanks -

HOWTO: Check Details Of SSL Certificate

openssl x509 -text -noout -in domain_com.crt

HOWTO: Check For The OpenSSL Heartbleed Bug in Debian Ubuntu Linux?

sudo lsb_release -a
sudo apt-cache policy openssl
sudo openssl version -a
sudo dpkg -l openssl
sudo apt-get changelog openssl
openssl s_client -connect -tlsextdebug 2>&1| grep 'server extension "heartbeat" (id=15)' || echo safe

If you are running Ubuntu 13.04 you will not have an updated package, so you must do it manually...

sudo -i
mkdir opensslfix
cd opensslfix
apt-get build-dep openssl
apt-get source openssl
cd openssl-1.0.1c/
nano Configure
   add -DOPENSSL_NO_HEARTBEATS to $debian_cflags (line 109)
dpkg-buildpackage -uc -b
cd ..
dpkg -l | grep -w 'libssl\|openssl'
dpkg -i *.deb

Restart all services which use openssl...

sudo service apache2 restart
sudo service proftpd restart
sudo service webmin restart
sudo service ssh restart

Testing tool -

What is a passphrase and how can I change the passphrase on my private key file?

A passphrase is a word or phrase that protects private key files. It prevents unauthorized users from encrypting them. Usually it's just the secret encryption/decryption key used for Ciphers.

To change the passphrase you simply have to read it with the old pass-phrase and write it again, specifying the new pass-phrase.

You can accomplish this with the following commands:

openssl rsa -des3 -in myserver.key -out
mv myserver.key

The first time you're asked for a PEM pass-phrase, you should enter the old pass-phrase. After that, you'll be asked again to enter a pass-phrase - this time, use the new pass-phrase. If you are asked to verify the pass-phrase, you'll need to enter the new pass-phrase a second time.