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From fda254c954d6a543e1977edc1d283c915ee43adc Mon Sep 17 00:00:00 2001
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From: Vitaly Kuznetsov <vkuznets@redhat.com>
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Date: Tue, 15 Nov 2022 14:57:23 +0100
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Subject: [PATCH] shared/tpm2-util: Fix "Error: Esys invalid ESAPI handle
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(40000001)" warning
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systemd-cryptenroll complains (but succeeds!) upon binding to a signed PCR
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policy:
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$ systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto
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--tpm2-public-key=... --tpm2-signature=..." /tmp/tmp.img
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ERROR:esys:src/tss2-esys/esys_iutil.c:394:iesys_handle_to_tpm_handle() Error: Esys invalid ESAPI handle (40000001).
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WARNING:esys:src/tss2-esys/esys_iutil.c:415:iesys_is_platform_handle() Convert handle from TPM2_RH to ESYS_TR, got: 0x40000001
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ERROR:esys:src/tss2-esys/esys_iutil.c:394:iesys_handle_to_tpm_handle() Error: Esys invalid ESAPI handle (40000001).
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WARNING:esys:src/tss2-esys/esys_iutil.c:415:iesys_is_platform_handle() Convert handle from TPM2_RH to ESYS_TR, got: 0x4000000
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New TPM2 token enrolled as key slot 1.
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The problem seems to be that Esys_LoadExternal() function from tpm2-tss
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expects a 'ESYS_TR_RH*' constant specifying the requested hierarchy and not
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a 'TPM2_RH_*' one (see Esys_LoadExternal() -> Esys_LoadExternal_Async() ->
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iesys_handle_to_tpm_handle() call chain).
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It all works because Esys_LoadExternal_Async() falls back to using the
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supplied values when iesys_handle_to_tpm_handle() fails:
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r = iesys_handle_to_tpm_handle(hierarchy, &tpm_hierarchy);
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if (r != TSS2_RC_SUCCESS) {
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...
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tpm_hierarchy = hierarchy;
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}
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Note, TPM2_RH_OWNER was used on purpose to support older tpm2-tss versions
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(pre https://github.com/tpm2-software/tpm2-tss/pull/1531), use meson magic
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to preserve compatibility.
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Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
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(cherry picked from commit 155c51293d5bf37f54c65fd0a66ea29e6eedd580)
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Related: #2138081
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---
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meson.build | 3 +++
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src/shared/tpm2-util.c | 6 ++++++
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2 files changed, 9 insertions(+)
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diff --git a/meson.build b/meson.build
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index 7750534466..015849af49 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -1474,11 +1474,14 @@ if want_tpm2 != 'false' and not skip_deps
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tpm2 = dependency('tss2-esys tss2-rc tss2-mu',
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required : want_tpm2 == 'true')
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have = tpm2.found()
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+ have_esys3 = tpm2.version().version_compare('>= 3.0.0')
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else
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have = false
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+ have_esys3 = false
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tpm2 = []
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endif
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conf.set10('HAVE_TPM2', have)
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+conf.set10('HAVE_TSS2_ESYS3', have_esys3)
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want_elfutils = get_option('elfutils')
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if want_elfutils != 'false' and not skip_deps
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diff --git a/src/shared/tpm2-util.c b/src/shared/tpm2-util.c
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index 4d0df944a9..8171b3e9e9 100644
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--- a/src/shared/tpm2-util.c
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+++ b/src/shared/tpm2-util.c
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@@ -1117,7 +1117,13 @@ static int tpm2_make_policy_session(
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ESYS_TR_NONE,
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NULL,
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&pubkey_tpm2,
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+#if HAVE_TSS2_ESYS3
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+ /* tpm2-tss >= 3.0.0 requires a ESYS_TR_RH_* constant specifying the requested
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+ * hierarchy, older versions need TPM2_RH_* instead. */
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+ ESYS_TR_RH_OWNER,
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+#else
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TPM2_RH_OWNER,
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+#endif
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&pubkey_handle);
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if (rc != TSS2_RC_SUCCESS) {
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r = log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),
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