File 0001-tpm-Use-tpm-hello-to-show-related-infromat... of Package grub2

Overview Repositories Revisions Requests Users Attributes Meta

File 0001-tpm-Use-tpm-hello-to-show-related-infromation.patch of Package grub2

From 17e4e27c68bdb320e00d323dbdd01a0430fb8a5f Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Mon, 29 Aug 2022 14:46:47 +0800
Subject: [PATCH] tpm: Use tpm-hello to show related infromation

---
 grub-core/commands/efi/tpm.c | 57 ++++++++++++++++++++++++++++++++++++
 grub-core/commands/tpm.c     |  1 +
 include/grub/tpm.h           |  1 +
 3 files changed, 59 insertions(+)

diff --git a/grub-core/commands/efi/tpm.c b/grub-core/commands/efi/tpm.c
index 585b3ccb1..f68997ba8 100644
--- a/grub-core/commands/efi/tpm.c
+++ b/grub-core/commands/efi/tpm.c
@@ -88,6 +88,27 @@ grub_tpm2_present (grub_efi_tpm2_protocol_t *tpm)
   return (grub_efi_boolean_t) tpm2_present;
 }
 
+static void
+grub_tpm2_show_caps (grub_efi_tpm2_protocol_t *tpm)
+{
+  grub_efi_status_t status;
+  EFI_TCG2_BOOT_SERVICE_CAPABILITY caps;
+
+  caps.Size = (grub_uint8_t) sizeof (caps);
+
+  status = efi_call_2 (tpm->get_capability, tpm, &caps);
+
+  if (status != GRUB_EFI_SUCCESS)
+    {
+      grub_printf ("Error trying to get tpm capability 0x%" PRIxGRUB_SIZE "\n", status);
+      return;
+    }
+  grub_printf ("HashAlgorithmBitmap 0x%" PRIxGRUB_UINT32_T "\n", caps.HashAlgorithmBitmap);
+  grub_printf ("TPMPresentFlag 0x%x\n", caps.TPMPresentFlag);
+  grub_printf ("NumberOfPcrBanks 0x%" PRIxGRUB_UINT32_T "\n", caps.NumberOfPcrBanks);
+  grub_printf ("ActivePcrBanks 0x%" PRIxGRUB_UINT32_T "\n", caps.ActivePcrBanks);
+}
+
 static grub_efi_boolean_t
 grub_tpm_handle_find (grub_efi_handle_t *tpm_handle,
 		      grub_efi_uint8_t *protocol_version)
@@ -241,6 +262,42 @@ grub_tpm_measure (unsigned char *buf, grub_size_t size, grub_uint8_t pcr,
     return grub_tpm2_log_event (tpm_handle, buf, size, pcr, description);
 }
 
+void
+grub_tpm_show_caps ()
+{
+  grub_efi_handle_t tpm_handle;
+  grub_efi_uint8_t protocol_version;
+
+  if (!grub_tpm_handle_find (&tpm_handle, &protocol_version))
+    {
+      grub_printf ("No TPM Handle found!\n");
+      return;
+    }
+  if (protocol_version == 1)
+    {
+      grub_efi_tpm_protocol_t *tpm;
+
+      grub_printf ("TPM 1.2\n");
+
+      tpm = grub_efi_open_protocol (tpm_handle, &tpm_guid,
+				    GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+      if (!tpm)
+	grub_printf ("Failed to Open TPM Protcol\n");
+    }
+  else
+    {
+      grub_efi_tpm2_protocol_t *tpm;
+
+      grub_printf ("TPM 2.0\n");
+      /*FIXME: Check tpm == 0 when open protocol failed ? */
+      tpm = grub_efi_open_protocol (tpm_handle, &tpm2_guid,
+				    GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+      if (!tpm)
+	grub_printf ("Failed to Open TPM Protcol\n");
+      return grub_tpm2_show_caps (tpm);
+    }
+}
+
 int
 grub_tpm_present ()
 {
diff --git a/grub-core/commands/tpm.c b/grub-core/commands/tpm.c
index 13675493f..3b7867317 100644
--- a/grub-core/commands/tpm.c
+++ b/grub-core/commands/tpm.c
@@ -91,6 +91,7 @@ grub_cmd_tpm_hello (grub_command_t cmd __attribute__ ((unused)),
 		  char **argv __attribute__ ((unused)))
 {
   grub_printf ("Hello!\n");
+  grub_tpm_show_caps ();
   return 0;
 }
 
diff --git a/include/grub/tpm.h b/include/grub/tpm.h
index c19fcbd0a..e4c02a919 100644
--- a/include/grub/tpm.h
+++ b/include/grub/tpm.h
@@ -37,4 +37,5 @@
 grub_err_t grub_tpm_measure (unsigned char *buf, grub_size_t size,
 			     grub_uint8_t pcr, const char *description);
 int grub_tpm_present (void);
+void grub_tpm_show_caps (void);
 #endif
-- 
2.37.2

Places

File 0001-tpm-Use-tpm-hello-to-show-related-infromation.patch of Package grub2

Places