linux-kernel - [PATCH v1] tpm2: add longer timeout for verify signature command

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Message-Id: <20210510142719.48153-2-amirmizi6@gmail.com>
Date:   Mon, 10 May 2021 17:27:19 +0300
From:   amirmizi6@...il.com
To:     Eyal.Cohen@...oton.com, jarkko.sakkinen@...ux.intel.com,
        peterhuewe@....de, jgg@...pe.ca
Cc:     linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org,
        Dan.Morav@...oton.com, oren.tanami@...oton.com,
        shmulik.hager@...oton.com, amir.mizinski@...oton.com,
        Amir Mizinski <amirmizi6@...il.com>
Subject: [PATCH v1] tpm2: add longer timeout for verify signature command

From: Amir Mizinski <amirmizi6@...il.com>

TPM2_CC_VERIFY_SIGNATURE(0x177) Current timeout does not apply to usage with
RSA 3070-bit keys.
Additional time may be required for usage with RSA 3070-bit keys. Therefore, the
timeout of TPM2_CC_VERIFY_SIGNATURE is set to 3 minutes (TPM_LONG_LONG).

Signed-off-by: Amir Mizinski <amirmizi6@...il.com>
---
 drivers/char/tpm/tpm2-cmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index eff1f12..235a454 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -87,7 +87,7 @@ static u8 tpm2_ordinal_duration_index(u32 ordinal)
 		return TPM_MEDIUM;
 
 	case TPM2_CC_VERIFY_SIGNATURE:        /* 177 */
-		return TPM_LONG;
+		return TPM_LONG_LONG;
 
 	case TPM2_CC_PCR_EXTEND:              /* 182 */
 		return TPM_MEDIUM;
-- 
2.7.4