From 07e127d85d9f22ac93f1e9da41a985013c4002ed Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Sun, 18 Nov 2018 14:22:25 -0700
Subject: [PATCH] tpm: Add a constant for the minimum supported digest size
When SHA1 is used we need 20 bytes for the digest size. Add a constant so
that clients can make use of this, e.g. to allocate local buffers.
Signed-off-by: Simon Glass <sjg@chromium.org>
---
include/tpm-common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/tpm-common.h b/include/tpm-common.h
index 5f8bc6bc52..449ad4c96e 100644
--- a/include/tpm-common.h
+++ b/include/tpm-common.h
@@ -26,6 +26,8 @@ enum tpm_duration {
/* Max buffer size supported by our tpm */
#define TPM_DEV_BUFSIZE 1260
+#define TPM_PCR_MINIMUM_DIGEST_SIZE 20
+
/**
* enum tpm_version - The version of the TPM stack to be used
* @TPM_V1: Use TPM v1.x stack
--
2.39.5