106 lines
3.9 KiB
Diff
106 lines
3.9 KiB
Diff
From 82561d585aa6d081fa5f9810f97664526726408e Mon Sep 17 00:00:00 2001
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From: Dan Streetman <ddstreet@ieee.org>
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Date: Mon, 19 Dec 2022 08:26:32 -0500
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Subject: [PATCH] tpm2: add tpm2_load()
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This function allows loading an object (e.g. a sealed secret) or key into the
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TPM.
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(cherry picked from commit d1d0de735da52a7cf5aa5638b07d5fdf4e8b23f2)
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Related: RHEL-16182
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---
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src/shared/tpm2-util.c | 69 +++++++++++++++++++++++++++---------------
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1 file changed, 45 insertions(+), 24 deletions(-)
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diff --git a/src/shared/tpm2-util.c b/src/shared/tpm2-util.c
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index fb75f105e5..6eb37a87aa 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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@@ -1484,6 +1484,50 @@ static int tpm2_get_policy_digest(
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return 0;
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}
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+static int tpm2_load(
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+ Tpm2Context *c,
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+ const Tpm2Handle *parent,
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+ const Tpm2Handle *session,
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+ const TPM2B_PUBLIC *public,
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+ const TPM2B_PRIVATE *private,
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+ Tpm2Handle **ret_handle) {
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+
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+ TSS2_RC rc;
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+ int r;
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+
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+ assert(c);
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+ assert(public);
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+ assert(private);
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+ assert(ret_handle);
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+
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+ log_debug("Loading object into TPM.");
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+
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+ _cleanup_(tpm2_handle_freep) Tpm2Handle *handle = NULL;
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+ r = tpm2_handle_new(c, &handle);
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+ if (r < 0)
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+ return r;
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+
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+ rc = sym_Esys_Load(
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+ c->esys_context,
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+ parent ? parent->esys_handle : ESYS_TR_RH_OWNER,
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+ session ? session->esys_handle : ESYS_TR_PASSWORD,
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+ ESYS_TR_NONE,
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+ ESYS_TR_NONE,
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+ private,
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+ public,
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+ &handle->esys_handle);
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+ if (rc == TPM2_RC_LOCKOUT)
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+ return log_error_errno(SYNTHETIC_ERRNO(ENOLCK),
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+ "TPM2 device is in dictionary attack lockout mode.");
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+ if (rc != TSS2_RC_SUCCESS)
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+ return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),
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+ "Failed to load key into TPM: %s", sym_Tss2_RC_Decode(rc));
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+
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+ *ret_handle = TAKE_PTR(handle);
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+
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+ return 0;
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+}
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+
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static int tpm2_pcr_read(
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Tpm2Context *c,
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const TPML_PCR_SELECTION *pcr_selection,
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@@ -3133,33 +3177,10 @@ int tpm2_unseal(const char *device,
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* provides protections.
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*/
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_cleanup_(tpm2_handle_freep) Tpm2Handle *hmac_key = NULL;
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- r = tpm2_handle_new(c, &hmac_key);
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+ r = tpm2_load(c, primary, NULL, &public, &private, &hmac_key);
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if (r < 0)
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return r;
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- rc = sym_Esys_Load(
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- c->esys_context,
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- primary->esys_handle,
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- ESYS_TR_PASSWORD,
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- ESYS_TR_NONE,
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- ESYS_TR_NONE,
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- &private,
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- &public,
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- &hmac_key->esys_handle);
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- if (rc != TSS2_RC_SUCCESS) {
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- /* If we're in dictionary attack lockout mode, we should see a lockout error here, which we
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- * need to translate for the caller. */
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- if (rc == TPM2_RC_LOCKOUT)
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- return log_error_errno(
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- SYNTHETIC_ERRNO(ENOLCK),
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- "TPM2 device is in dictionary attack lockout mode.");
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- else
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- return log_error_errno(
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- SYNTHETIC_ERRNO(ENOTRECOVERABLE),
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- "Failed to load HMAC key in TPM: %s",
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- sym_Tss2_RC_Decode(rc));
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- }
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-
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TPM2B_PUBLIC pubkey_tpm2, *authorize_key = NULL;
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_cleanup_free_ void *fp = NULL;
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size_t fp_size = 0;
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