Overview
For Universal Controller and Universal Agent 7.6 and forward, the installation packages are PGP-signed for security and authentication.
Verifying the files with digital signatures helps mitigate the risk of downloading and installing malicious or compromised software.
You can download the public key here to verify packages.
This page will show you how the signature interaction works and how you can verify the files once you download them.
Checking Signatures
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The example provided uses The GNU Privacy Guard. Any OpenPGP -compliant program should work successfully. |
Each package has a corresponding .asc file (detached signature). For example, the release EXAMPLE FILE NAME release universal-controller-7.6.0.0-build.140.zip would have a corresponding file, EXAMPLE ASC FILE NAME universal-controller-7.6.0.0-build.140.zip.asc.
These instructions assume you have already installed both of these files.
Check the detached signature(EXAMPLE) against the corresponding release(EXAMPLE ASC).
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COMMAND LINES |
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1. Retrieve Public Key
Download the GPG public key from https://packages.stonebranch.com/uac/GPG-KEY-UAC.asc
2. Import and Sign the Public Key.
Verify that the fingerprint of the public key is B666 8901 95B2 A3E6 F8A2 1FC8 77D5 3847 2C46 C119.
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>gpg --import --import-options show-only GPG-KEY-UAC.asc
pub rsa4096 2024-02-27 [C] [expires: 2027-02-26]
B666890195B2A3E6F8A21FC877D538472C46C119
uid Stonebranch, Inc. <support@stonebranch.com>
sub rsa4096 2024-02-27 [S] [expires: 2027-02-26]
sub rsa4096 2024-02-27 [S] [expires: 2027-02-26] |
Import the verified public key.
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>gpg --import GPG-KEY-UAC.asc
gpg: key 77D538472C46C119: public key "Stonebranch, Inc. <support@stonebranch.com>" imported
gpg: Total number processed: 1
gpg: imported: 1 |
Certify the public key by signing it with your private key.
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>gpg --lsign B666890195B2A3E6F8A21FC877D538472C46C119 pub rsa4096/77D538472C46C119 created: 2024-02-27 expires: 2027-02-26 usage: C trust: unknown validity: unknown sub rsa4096/2F768A37A6E81362 created: 2024-02-27 expires: 2027-02-26 usage: S sub rsa4096/4836F914BEE9CDF3 created: 2024-02-27 expires: 2027-02-26 usage: S [ unknown] (1). Stonebranch, Inc. <support@stonebranch.com> pub rsa4096/77D538472C46C119 created: 2024-02-27 expires: 2027-02-26 usage: C trust: unknown validity: unknown Primary key fingerprint: B666 8901 95B2 A3E6 F8A2 1FC8 77D5 3847 2C46 C119 Stonebranch, Inc. <support@stonebranch.com> This key is due to expire on 2027-02-26. Are you sure that you want to sign this key with your key "*** <***>" (***) The signature will be marked as non-exportable. Really sign? (y/N) y |
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If you omit this step, then you will see the following warning when verifying the Universal Controller archive signature.
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3. Verify the Archive
Verify the installation packages.
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>gpg --verify universal-controller-7.6.0.0-build.140.zip.asc universal-controller-7.6.0.0-build.140.zip
gpg: Signature made 04/02/24 15:45:21 Eastern Daylight Time
gpg: using RSA key 7870D479A577FCF6518A62CD2F768A37A6E81362
gpg: Good signature from "Stonebranch, Inc. <support@stonebranch.com>" [full] |