From: Simon Glass <sjg@chromium.org>
Date: Sun, 18 Nov 2018 21:22:25 +0000 (-0700)
Subject: tpm: Add a constant for the minimum supported digest size
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-logo.png?a=commitdiff_plain;h=07e127d85d9f22ac93f1e9da41a985013c4002ed;p=u-boot.git

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>
---

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