Importing keys results in error SW=0x6700

[Aetherinox]

• YubiKey Manager (ykman) version: Yubikey Manager v1.2.6; CLI v5.5.1
• How was it installed?: exe
• Operating system and version: Win 11 Pro 10.0.22631 Build 22631
• YubiKey model and version: Yubikey 5 - Firmware 5.4.3
• Bug description summary:
  When attempting to import an ECC 384 key using either the command-line or Yubikey Manager, it results in the error yubikit.core.smartcard.ApduError: APDU error: SW=0x6700

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Edit: To summarize. It appears like a muppet, I had Yubikey Manager and ykman CLI in my Windows paths, and since Yubikey Manager GUI comes with an old version of ykman, they were fighting. So when I got the long error, it was from 5.0.4 on the Yubikey Manager's version. Then when I killed the windows path to Yubikey manager and kept only ykman, I had the correct version of 5.5.x.

So it wasn't really an issue, just a moment of confusion. I guess the only thing I really need is to understand what the error means:

ERROR: APDU length exceeds YubiKey capability

Which I googled, and could not seem to get an explanation on.

Edit 2:

I read through the source code for that error, which lead me to some defined value

class _MaxApduSize(IntEnum):
    NEO = 1390
    YK4 = 2038
    YK4_3 = 3062

Then I found:

• https://docs.yubico.com/yesdk/users-manual/application-piv/apdu/auth-sign.html
  So I'm going to assume that this is referring to the message digest.

And according to those docs, ECC384 should use an md of 384 bits But when I try that, same error. Also tried SHA256 for the digest, and yet again, same error.

Steps to reproduce

Generate ECC 384 via OpenSSL, then import into Yubikey Manager, or using the CLI with ykman piv certificates import

Expected result

Key should import

Actual results and logs

The following command runs fine:

ykman piv keys import

However, when I run

ykman piv certificates import -m "MANAGEMENT_KEY" -p "pass" 9A "Path/to/file.pfx"

I get the following error:

ERROR: An unexpected error has occuredTraceback (most recent call last):
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\ykman\_cli\__main__.py", line 364, in main
    cli(obj={})
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\click\decorators.py", line 33, in new_func
    return f(get_current_context(), *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\ykman\_cli\piv.py", line 804, in import_certificate
    session.put_certificate(slot, cert_to_import)
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\yubikit\piv.py", line 736, in put_certificate
    self.put_object(OBJECT_ID.from_slot(slot), data)
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\yubikit\piv.py", line 701, in put_object
    self.protocol.send_apdu(
  File "C:\Program Files\Yubico\YubiKey Manager\pymodules\yubikit\core\smartcard.py", line 206, in send_apdu
    raise ApduError(response, sw)
yubikit.core.smartcard.ApduError: APDU error: SW=0x6700

When I attempt to import using Yubikey Manager with elevated permissions, all I get is the red box with SW=0x6700

Other info

Ensured I updated all drivers, CLI, and Yubikey Manager