This article contains details on validating the origin and integrity of the latest version of Nova

Nova 12.4 Checksum

The SHA256 checksum of the Nova 12.4.zip archive, available at https://download.panic.com/nova/Nova 12.4.zip is:

6c38ebe5bc6ae85e5b99803186321d73ae2e1df69aa4081f50babea3e46e492b

Validating the Checksum

1. Download Nova 12.4.zip
2. Run the following command in Terminal to compute the checksum of your copy:

$ shasum -a 256 ~/Downloads/Nova\ 12.4.zip

If the hash portion of the command output matches the checksum above:

6c38ebe5bc6ae85e5b99803186321d73ae2e1df69aa4081f50babea3e46e492b  /Users/panic/Downloads/Nova 12.4.zip

you can be sure that your copy of the download is identical to the version on our website.

Unfortunately, validating the checksum alone does not guarantee that the contents of Nova 12.4.zip haven’t changed since we posted it*. However, with one extra step you can also determine with certainty that the checksum above, and therefore the contents of the ZIP, originated from Panic.

*Why not? In the very unlikely circumstance that a malicious actor replaced the ZIP archive on our website and modified the contents of this article using a new SHA256 hash, the checksum could still validate.

Nova 12.4 Checksum Signature

Using our public key, we have PGP-signed the SHA256 checksum from above:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

6c38ebe5bc6ae85e5b99803186321d73ae2e1df69aa4081f50babea3e46e492b
-----BEGIN PGP SIGNATURE-----

iQEzBAEBCgAdFiEE6i1R0iW3pPNCW77Iq26O7ibMLj0FAmfCM2gACgkQq26O7ibM
Lj1dFAf+OB6EZNDbpi0Uor6lFkrslhCR7foTZt5BzEV7T5SNHPTzgQpio1MhmlkG
gQo7s4SARWUgzj67k4m3fx7tJpxiIj3lKjVtY3wcOZkw6cXdgt3UkzZ/Da183Byo
2iHG3wpP6HXS41PBuIOcAYsAZveQA3CmfmnUxtFoLl6LDAeuOAjJOdDviMsCOySc
pq6xUJLWbtpc+dHjL/gUuYfotx42YK4F7FGPqUj5DsWEa04QqVeW/vTl0Zxj9O4M
rN1xCv9pIcYjMFJ05dHuM8H43ZgaPC/CdP6gD24PZhjPOuaP2/dILs6v84IGvNbO
cWOFZM2+mi5Q0TNHicOXkU8w19AALg==
=FrbM
-----END PGP SIGNATURE-----

Validating the Signature

1. Follow these instructions to install GnuPG
2. Open your terminal
3. Copy the entire PGP message above, including -----BEGIN PGP MESSAGE----- and -----END PGP MESSAGE-----
4. Use the echo "<message" | gpg --verify - command to verify the PGP message copied above

Most importantly, GnuPG should indicate that the message was signed by Panic:

Additionally, the resulting Signed Text should match our original checksum:

6c38ebe5bc6ae85e5b99803186321d73ae2e1df69aa4081f50babea3e46e492b

If both items match, you can be sure that the checksum in this article originated from Panic.

Putting it all together

By using two factors of validation:

• A checksum which ensures that your copy of Nova 12.4.zip is identical to the copy on our website
• A PGP signature which ensures that the checksum originated from Panic

you can be sure that you are installing the release that we originally posted.

Support

We are more than happy to answer questions or help provide any guidance you might need to validate the checksum and signature for this release. Please email us, nova@panic.com.