Generating a CA-signed certificate

01/21/2021 Contributors

The SnapDrive for UNIX daemon service requires that you generate a CA-signed certificate for successful daemon communication. You must provide the CA-signed certificate at the path specified in the snapdrive.conf file.

You must be logged in as a root user.
You must have set the following parameters in the snapdrive.conf file to use HTTPS for communication:
- use-https-to-sdu-daemon=on
- contact-https-port-sdu-daemon=4095
- sdu-daemon-certificate-path=/opt/NetApp/snapdrive/snapdrive.pem

Steps

Generate a new unencrypted RSA private key in a pem format:

$ openssl genrsa -out privkey.pem 1024

Generating RSA private key, 1024 bit long modulus
 ....................++++++ ....................................++++++
e is 65537 (0x10001)

Configure /etc/ssl/openssl.cnf to create the CA private key and the certificate vi /etc/ssl/openssl.cnf.

Create an unsigned certificate using your RSA private key:

$ openssl req -new -x509 -key privkey.pem -out cert.pem

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]:NY
State or Province Name (full name) []:Nebraska Locality Name (eg,
city) [Default City]:Omaha Organization Name (eg, company) [Default
Company Ltd]:abc.com Organizational Unit Name (eg, section) []:
Common Name (eg, your name or your server's hostname) []:localhost
Email Address []:abc@example.org

Use your private key and your certificate to create a CSR:

cat cert.pem privkey.pem | openssl x509 -x509toreq -signkey privkey.pem -out certreq.csr
```
Getting request Private Key Generating certificate request
```

Sign the certificate with the CA private key by using the CSR that you have just created:

$ openssl ca -in certreq.csr -out newcert.pem

Using configuration from /etc/pki/tls/openssl.cnf Check that the
request matches the signature Signature ok Certificate Details:
         Serial Number: 4096 (0x1000)
         Validity
            Not Before: May 17 06:02:51 2015 GMT
             Not After : May 16 06:02:51 2016 GMT
             Subject:
             countryName               = NY
             stateOrProvinceName       = Nebraska
             organizationName          = abc.com
             commonName                = localhost
             emailAddress              = abc@example.org
             X509v3 extensions:
             X509v3 Basic Constraints:
                 CA:FALSE
             X509v3 Key Usage:
                 Digital Signature, Non Repudiation, Key Encipherment
             Netscape Comment:
                 OpenSSL Generated Certificate
             X509v3 Subject Key Identifier:
                 FB:B0:F6:A0:9B:F2:C2:BC:50:BF:45:B2:9D:DB:AA:3B:C5:07:5B:7F
             X509v3 Authority Key Identifier:

 keyid:FB:B0:F6:A0:9B:F2:C2:BC:50:BF:45:B2:9D:DB:AA:3B:C5:07:5B:7F

 Certificate is to be certified until May 16 06:02:51 2016 GMT (365
 days) Sign the certificate? [y/n]:y


 1 out of 1 certificate requests certified, commit? [y/n]y Write out
 database with 1 new entries Data Base Updated

Install the signed certificate and the private key to be used by an SSL server.

The newcert.pem is the certificate signed by your local CA that you can then use in an
ssl server:
( openssl x509 -in newcert.pem; cat privkey.pem ) > server.pem
ln -s server.pem `openssl x509 -hash -noout -in server.pem`.0 # dot-zero
( server.pem refers to location of https server certificate)

Generating a CA-signed certificate

Creating your file...