Unlock FileVault-encrypted boot drive using barcode scanner

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Level 1

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Unlock FileVault-encrypted boot drive using barcode scanner

Hi,

I can use barcode scanner for logging (pass the password by scanning barcode/QRcode).

However, when disk is FileVault-encrypted the special characters are not passed.

I tried to prepare barcode/QR using different fonts, tried ZPL, or tried ASCII hexadecimal (%40 as @) without succeed (you can check barcode string under Recovery Key).

Does anyone have any clue how to pass special characters by barcode scanner during disc unlock?

Many thanks in advance.

Mac mini, macOS 10.15

Posted on Jun 15, 2021 4:01 AM

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Answer 1

Barney-15E

Level 10

123,038 points

Jun 15, 2021 12:27 PM in response to pe6on

However, when disk is FileVault-encrypted the special characters are not passed.

Does anything get sent to the password field? There really isn't an OS running to host the barcode scanner for it to pass anything unless it is pretending to be a keyboard. URL encoding (%40) wouldn't be useful.

If it is acting as a keyboard (HID), then perhaps the key codes being sent are not what the password field expects to see. It may be seeing the device as a different input source (keyboard layout) than what you set the password to use.

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Answer 2

Owl-53

Level 10

105,007 points

Jun 15, 2021 7:57 AM in response to pe6on

Understand the concept for wanting to Automate via outline process. This defeats the Security idea of the User being present to input the Specific Password to unlock the FileVault-encryption password.

Anyone who could gain access to the QRCode, in theory could be able to unlock the drive.

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Unlock FileVault-encrypted boot drive using barcode scanner

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