From 76641c1e6b016979973fead7a24bb8fca4ee8325 Mon Sep 17 00:00:00 2001

From: Johannes Holland <johannes.holland@infineon.com>

Date: Thu, 26 Sep 2019 09:46:09 +0100

Subject: [PATCH] esys: fix keysize of ECC curve TPM2_ECC_NISTP224

In esys_crypto_ossl.c, for the ECC curve TPM2_ECC_NISTP244 a key size of

38 is selected. However, 224 bit / 8 bit/byte = 28 byte.

Signed-off-by: Johannes Holland <johannes.holland@infineon.com>

---

 src/tss2-esys/esys_crypto_ossl.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tss2-esys/esys_crypto_ossl.c b/src/tss2-esys/esys_crypto_ossl.c

index 124501964ae7..3c5d86d69705 100644

--- a/src/tss2-esys/esys_crypto_ossl.c

+++ b/src/tss2-esys/esys_crypto_ossl.c

@@ -804,7 +804,7 @@ iesys_cryptossl_get_ecdh_point(TPM2B_PUBLIC *key,

         break;

     case TPM2_ECC_NIST_P224:

         curveId = NID_secp224r1;

-        key_size = 38;

+        key_size = 28;

         break;

     case TPM2_ECC_NIST_P256:

         curveId = NID_X9_62_prime256v1;

-- 

2.27.0