shim/tpm: Remove magic numbers

When measuring data into the TPM and generating events logs, the event
type is set to EV_IPL (0xd), and for TPM1.2 the algorithm will always
be set to SHA-1 (0x4).

So, add some macro-defined constants for these instead of having them
as magic numbers to make the code more readable.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/tpm.h b/tpm.h
index 7c836448..27cb418e 100644
--- a/tpm.h
+++ b/tpm.h
@@ -1,6 +1,9 @@
 #define EFI_TPM_GUID {0xf541796d, 0xa62e, 0x4954, {0xa7, 0x75, 0x95, 0x84, 0xf6, 0x1b, 0x9c, 0xdd }};
 #define EFI_TPM2_GUID {0x607f766c, 0x7455, 0x42be, {0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f }};
 
+#define TPM_ALG_SHA 0x00000004
+#define EV_IPL      0x0000000d
+
 EFI_STATUS tpm_log_event(EFI_PHYSICAL_ADDRESS buf, UINTN size, UINT8 pcr,
 			 const CHAR8 *description);