Decrypt backup file using GPG keychain

[nagouvei]

How to decrypt an ACS backup file (.gpg.tar) using GPG keychain software? I tried decrypting the ISE backup file and it was successful, however decrypting ACS back up failed.

[Arne Bier]

Have you tried this command on a Linux command line?

gpg -v --batch --yes --passphrase myEncryptionKey -d somefile.tar.gpg > somefile.tar

You need to know the key which was used to encrypt the file - myEncryptionKey

Input filename - somefile.tar.gpg

Output filename - somefile.tar

[nagouvei]

Hi Arne,

I tried the command you provided, but it did not work for ACS however it worked for ISE backup.

[Arne Bier · Accepted solution]

It just occurred to me that ACS doesn't allow you to specify an encryption key.  Therefore you won't stand a chance to decode this file.  Only the ACS config restore function will be able to decrypt it.

ISE is a bit friendlier in that respect because we are forced to chose an encryption key which we then use going forward.