Hi Davide, you are correct, you are somewhere referencing a (ESYS_TR handle) that does not exist. I guess code would be good, so we can help you... A typical usage looks like this: ESYS_TR sessiontr; TPMT_SYM_DEF symmetric = { .algorithm = TPM2_ALG_NULL }; r = Esys_StartAuthSession(ectx, ESYS_TR_NONE, ESYS_TR_NONE, /* tpmKey, bind */ ESYS_TR_NONE, ESYS_TR_NONE, ESYS_TR_NONE, /* shandle 1-3 */ NULL, /*nonceCaller */, TPM2_SE_HMAC, &symmetric, TPM2_ALG_SHA1, &sessiontr, NULL /* tpmNonce */); If this does not work, please send us your code... Cheers, Andreas ________________________________ From: tpm2 [tpm2-bounces(a)lists.01.org] on behalf of Davide Rutigliano [davide.ruti(a)gmail.com] Sent: Monday, April 30, 2018 22:16 To: tpm2(a)lists.01.org Subject: [tpm2] ESAPI StartAuthSession Hello everyone, I'm in trouble with Esys_StartAuthSession because I receive continuously this error and I cannot understand why: """ ERROR:esys_iutil:esapi/esapi_util/esys_iutil.c:879:esys_GetResourceObject() Error: Esys handle does not exist (70018). ERROR:esys:esapi/esapi/Esys_StartAuthSession.c:124:Esys_StartAuthSession() Error in async function ErrorCode (0x00070018) TPM2_StartAuthSession failed with 0x70018 """ I suppose I'm doing something wrong with session handles but I don't know what. Could someone help me please? Thanks in advance, Davide Rutigliano.

The engine will use ESYS's auto-config of a tpm. Thus is searches in the following order: - TABRMD via DBUS - /dev/tpmrm0 - /dev/tpm0 - Simulator at localhost:2321 If non of those are found, it errors. So if you do not have 1-3 available it will connect to the simulator. After the 2.0 release of tpm2-tss, a feature will be added to choose the TPM via environment variable: see https://github.com/tpm2-software/tpm2-tss/pull/1049 Cheers, Andreas ________________________________ From: tpm2 [tpm2-bounces(a)lists.01.org] on behalf of Davide Rutigliano [davide.ruti(a)gmail.com] Sent: Thursday, June 14, 2018 09:43 To: tpm2(a)lists.01.org Subject: Re: [tpm2] ESAPI StartAuthSession And another question, is it possible to use the engine with tpm simulator or it is implemented only with devices configuration? If so, do you think could be a good enhancement to work with the software tpm also? I think it's not a long work so maybe I can do that. Regards, Davide Il lun 30 apr 2018, 22:16 Davide Rutigliano <davide.ruti@gmail.com<mailto:davide.ruti@gmail.com>> ha scritto: Hello everyone, I'm in trouble with Esys_StartAuthSession because I receive continuously this error and I cannot understand why: """ ERROR:esys_iutil:esapi/esapi_util/esys_iutil.c:879:esys_GetResourceObject() Error: Esys handle does not exist (70018). ERROR:esys:esapi/esapi/Esys_StartAuthSession.c:124:Esys_StartAuthSession() Error in async function ErrorCode (0x00070018) TPM2_StartAuthSession failed with 0x70018 """ I suppose I'm doing something wrong with session handles but I don't know what. Could someone help me please? Thanks in advance, Davide Rutigliano.