Create SSL Certificate (Self-Signed)2021/04/30
|Create Self Signed SSL Certificate by yourself.
It had beeter to use Self Signed Certificate on the environment for the purpose of testing, develomement, and so on, not recommended to use on production System.
openssl genrsa -aes128 2048 > server.key
Generating RSA private key, 2048 bit long modulus .+++ .................................+++ e is 65537 (0x010001) Enter pass phrase: # set passphrase Verifying - Enter pass phrase: # confirm
# remove passphrase from private key
openssl rsa -in server.key -out server.key
Enter pass phrase for server.key: # input passphrase writing RSA key[root@dlp certs]#
openssl req -utf8 -new -key server.key -out server.csr
You are about to be asked to enter information that will be incorporated into your certificate request. What you are about to enter is what is called a Distinguished Name or a DN. There are quite a few fields but you can leave some blank For some fields there will be a default value, If you enter '.', the field will be left blank. ----- Country Name (2 letter code) [XX]:JP # country code State or Province Name (full name) :Hiroshima # state Locality Name (eg, city) [Default City]:Hiroshima # city Organization Name (eg, company) [Default Company Ltd]:GTS # company Organizational Unit Name (eg, section) :Server World # department Common Name (eg, your name or your server's hostname) :dlp.srv.world # server's FQDN Email Address :firstname.lastname@example.org # admin email address Please enter the following 'extra' attributes to be sent with your certificate request A challenge password : An optional company name :
# create certificate with 10 years expiration date
openssl x509 -in server.csr -out server.crt -req -signkey server.key -days 3650
Signature ok subject=C = JP, ST = Hiroshima, L = Hiroshima, O = GTS, OU = Server World, CN = dlp.srv.world, emailAddress = email@example.com Getting Private key[root@dlp certs]#
chmod 600 server.key
-rw-r--r--. 1 root root 1334 Apr 29 20:23 server.crt -rw-r--r--. 1 root root 1062 Apr 29 20:23 server.csr -rw-------. 1 root root 1675 Apr 29 20:22 server.key