TSS.NET does not work on Linux - Unable to load DLL 'tbs.dll': The specified module or one of its dependencies could not be found.

[CIPop]

Trying using TSS.NET in a netcoreapp2.1 on Ubuntu 16.04 Linux I'm getting:

System.DllNotFoundException: Unable to load DLL 'tbs.dll': The specified module or one of its dependencies could not be found.
 (Exception from HRESULT: 0x8007007E)
   at Tpm2Lib.TbsWrapper.NativeMethods.Tbsi_Context_Create(TBS_CONTEXT_PARAMS& ContextParams, UIntPtr& Context)
   at Tpm2Lib.TbsDevice.Connect()
   at Microsoft.Azure.Devices.Tpm.TpmDevice..ctor(Tpm2Device tpmDevice, UInt32 logicalDeviceId, Byte[] ekAuth, Action`2 initializeAction) in /home/cristian/int/DpsPoc/DpsPocLib/Tpm/TpmDevice.cs:line 56

Unhandled Exception: System.DllNotFoundException: Unable to load DLL 'tbs.dll': The specified module or one of its dependencies could not be found.
 (Exception from HRESULT: 0x8007007E)

@amarochk and I discussed offline that the steps to enable this are:

• Create a new class similar to TbsDevice
• Instead of sending TPM command buffer via the TBS API, send it to /dev/tpm_n_ (n being the TPM device ID).
• Packaging with multi target for RID == linux-x64

[CIPop]

@amarochk please verify above and add more details required for an implementation.

/cc @tameraw @jasmineymlo

[rquackenbush]

I'm seeing this in my environment. I'm using version 2.1.1 of the Microsoft.TSS nuget package and am running on Ubuntu 18.04 LTS.

Unhandled Exception: System.DllNotFoundException: Unable to load shared library 'tbs.dll' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libtbs.dll: cannot open shared object file: No such file or directory
   at Tpm2Lib.TbsWrapper.NativeMethods.Tbsi_Context_Create(TBS_CONTEXT_PARAMS& ContextParams, UIntPtr& Context)
   at Tpm2Lib.TbsDevice.Connect() in e:\git\TSS.MSR\TSS.NET\TSS.Net\TbsDevice.cs:line 44

I don't see tbs.dll anywhere in the nuget package. What am I doing wrong?

[amarochk]

You are probably trying instantiate the TbsDevice class, while on Linux you need to use LinuxTpmDevice.

[rquackenbush]

That was it! Thanks for your quick response.