• Registered: 2022-09-02
  • Posts: 7

Topic: Using wolftpm on Windows 10

I trying to do some use cases with wolftpm on windows 10 using visual studio in c++ but i only receive bad args i using the commands wolftpm2_GetRandom, I don't know if I forgot some configuration but the command wolftpm_init its working.


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  • Registered: 2015-10-07
  • Posts: 416

Re: Using wolftpm on Windows 10

Hi luizg473,

Are you building with `--enable-winapi` or setting `#define WOLFTPM_WINAPI`? This will enable using the Window TBS layer for communicating with the TPM. If you are building with winapi then the TPM2_Init IO callback can be NULL. Also you should use wolfTPM2_Init if you are using wrapper API's.

Let me know if that doesn't work.

Thanks,
David Garske, wolfSSL

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  • Registered: 2022-09-02
  • Posts: 7

Re: Using wolftpm on Windows 10

Sorry but can you share a link with this step to active '--enable-winapi', because I was able to install with vcpkg, I didn't have to enable anything in the windows terminal.

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  • Registered: 2015-10-07
  • Posts: 416

Re: Using wolftpm on Windows 10

Hi Luizg473,

I think your issue is not using `wolfTPM2_Init` and `wolfTPM2_Cleanup`. Have you tried that?

wolfTPM should have the WinAPI option enabled by default for windows: https://github.com/wolfSSL/wolfTPM/blob … ts.txt#L86

You can use `WOLFTPM_INTERFACE=WINAPI` to force it.

The build settings for wolfTPM come from here: https://github.com/microsoft/vcpkg/blob … file.cmake

Thanks,
David Garske, wolfSSL

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  • Registered: 2022-09-02
  • Posts: 7

Re: Using wolftpm on Windows 10

yes i tried with the wrapper but the tpm didn't even initialize

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