1.4. Verify the Downloaded ISO (Optional)¶
You can do a quick hash check to verify that the download was not corrupted. We recommend to verify the downloaded ISO's signature as this is the cryptographically sound method.
The hash and signature file are both part of the ZIP archive you download from our portal server.
1.4.1. Via Hash¶
Extract the ZIP and check the sha256 hash:
On Linux
user@host:~$ sha256sum -c nextron-universal-installer.iso.sha256
nextron-universal-installer.iso: OK
or in Windows command prompt
C:\Users\user\Desktop\asgard2-installer>type nextron-universal-installer.iso.sha256
efccb4df0a95aa8e562d42707cb5409b866bd5ae8071c4f05eec6a10778f354b nextron-universal-installer.iso
C:\Users\user\Desktop\asgard2-installer>certutil -hashfile nextron-universal-installer.iso SHA256
SHA256 hash of nextron-universal-installer.iso:
efccb4df0a95aa8e562d42707cb5409b866bd5ae8071c4f05eec6a10778f354b
CertUtil: -hashfile command completed successfully.
or in Powershell
PS C:\Users\user\Desktop\asgard2-installer>type .\nextron-universal-installer.iso.sha256
efccb4df0a95aa8e562d42707cb5409b866bd5ae8071c4f05eec6a10778f354b nextron-universal-installer.iso
PS C:\Users\user\Desktop\asgard2-installer>Get-FileHash .\nextron-universal-installer.iso
Algorithm Hash Path
--------- ---- ----
SHA256 EFCCB4DF0A95AA8E562D42707CB5409B866BD5AE8071C4F05EEC6A10778F354B C:\Users\user\Desktop\asgard2-installer\nextron-universal-installer.iso
1.4.2. Via Signature (Recommended)¶
Extract the ZIP, download the public signature and verify the signed ISO:
On Linux
user@host:~$ wget https://www.nextron-systems.com/certs/codesign.pem
user@host:~$ openssl dgst -sha256 -verify codesign.pem -signature nextron-universal-installer.iso.sig nextron-universal-installer.iso
Verified OK
or in powershell
PS C:\Users\user\Desktop\asgard2-installer>Invoke-WebRequest -Uri https://www.nextron-systems.com/certs/codesign.pem -OutFile codesign.pem
PS C:\Users\user\Desktop\asgard2-installer>"C:\Program Files\OpenSSL-Win64\bin\openssl.exe" dgst -sha256 -verify codesign.pem -signature nextron-universal-installer.iso.sig nextron-universal-installer.iso
Verified OK
Note
If openssl is not present on your system you can easily install it using winget: winget install openssl.