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From 0bd19b61c8cd07d03b6efffc05f95d5ec427a3d6 Mon Sep 17 00:00:00 2001
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From: Tadeusz Struk <tadeusz.struk@intel.com>
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Date: Tue, 14 Jan 2020 10:55:20 -0800
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Subject: [PATCH] esys: fix Esys_StartAuthSession called with optional params
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For an HMAC session if any of the optional params are ESYS_TR_NONE
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we need to use the same tpm2_handles TPM2_RH_NULL (0x40000007)
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as in the prepare call to correctly calculate cpHash and HMAC
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values for the session.
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Fixes: #1590
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Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
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---
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src/tss2-esys/api/Esys_StartAuthSession.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/src/tss2-esys/api/Esys_StartAuthSession.c b/src/tss2-esys/api/Esys_StartAuthSession.c
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index 313604a2077c..3ccd842a7572 100644
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--- a/src/tss2-esys/api/Esys_StartAuthSession.c
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+++ b/src/tss2-esys/api/Esys_StartAuthSession.c
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@@ -260,7 +260,19 @@ Esys_StartAuthSession_Async(
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iesys_compute_session_value(esysContext->session_tab[2], NULL, NULL);
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/* Generate the auth values and set them in the SAPI command buffer */
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- r = iesys_gen_auths(esysContext, tpmKeyNode, bindNode, NULL, &auths);
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+
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+ RSRC_NODE_T none;
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+ size_t offset = 0;
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+ none.rsrc.handle = TPM2_RH_NULL;
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+ none.rsrc.rsrcType = IESYSC_WITHOUT_MISC_RSRC;
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+ r = Tss2_MU_TPM2_HANDLE_Marshal(TPM2_RH_NULL,
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+ none.rsrc.name.name,
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+ sizeof(none.rsrc.name.name),
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+ &offset);
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+ return_state_if_error(r, _ESYS_STATE_INIT, "Marshaling TPM handle.");
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+ none.rsrc.name.size = offset;
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+ r = iesys_gen_auths(esysContext, tpmKeyNode ? tpmKeyNode : &none,
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+ bindNode ? bindNode : &none, NULL, &auths);
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return_state_if_error(r, _ESYS_STATE_INIT,
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"Error in computation of auth values");
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--
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2.27.0
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