Open ssl.conf
in a text editor.
Edit the domain(s) listed under the [alt_names]
section so that they match the local domain name you want to use for your project, e.g.
DNS.1 = my-project.dev
Additional FQDNs can be added if required:
DNS.1 = my-project.dev
DNS.2 = www.my-project.dev
DNS.3 = fr.my-project.dev
Create a directory for your project, e.g. my_project
and save ssl.conf
inside it.
Open Terminal and navigate to 'my_project':
cd my_project
Generate a private key:
openssl genrsa -out private.key 4096
Generate a Certificate Signing Request
openssl req -new -sha256 \
-out private.csr \
-key private.key \
-config ssl.conf
(You will be asked a series of questions about your certificate. Answer however you like, but for 'Common name' enter the name of your project, e.g. my_project
)
Now check the CSR:
openssl req -text -noout -in private.csr
You should see this:
X509v3 Subject Alternative Name: DNS:my-project.site
and
Signature Algorithm: sha256WithRSAEncryption
Generate the certificate
openssl x509 -req \
-sha256 \
-days 3650 \
-in private.csr \
-signkey private.key \
-out private.crt \
-extensions req_ext \
-extfile ssl.conf
Add the certificate to keychain and trust it:
sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain private.crt
(Alternatively, double click on the certificate file private.crt
to open Keychain Access. Your project name my_project
will be listed under the login keychain. Double click it and select 'Always trust' under the 'Trust' section.)
If you are using MAMP Pro, add (or edit) a host with the server name you listed under the [alt_names]
section of your ssl.conf. On the SSL tab select the Certificate file and Certificate key that you just generated.
Save changes and restart Apache.
As of OpenSSL 1.1.1, providing subjectAltName directly on command line becomes much easier:
More info here: https://security.stackexchange.com/questions/74345/provide-subjectaltname-to-openssl-directly-on-the-command-line
Also python universal script: