[tpm2] Fapi_Decrypt using auth value

[tpm2] Fapi_Decrypt using auth value

[Anthony Arrascue]

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Hello,

I am learning about encryption / decryption using Fapi.
For that purpose, I create a key using tss2_createkey and use tss2_encrypt / tss2_decrypt (and their Fapi equivalents).

tss2_ createkey has the argument -a, --authValue to set up a decryption password.
With tss2_encrypt I generate the cipher text.

The problem is with the decryption process. When I decrypt with tss2_decrypt I got asked for that authValue. If it is given correctly it decrypts the cipher text. However, Fapi_Decrypt will fail throwing an authorization error.

I was wondering how to programmatically enter the authValue? Fapi_Decrypt has no arguments to pass it. Maybe through the FAPI_CONTEXT?

Using TPM2-TSS v. 2.4.x
TPM2-TOOLS v. 4.X

Thank you for any possible help.
Best,


Anthony Arrascue
--------------------------------------
neuroloop GmbH
Breisacher Str. 86, 79110 Freiburg, Germany
aarrascue(a)neuroloop.de<mailto:aarrascue(a)neuroloop.de>
neuroloop.de



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