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tpm2: Skip call to DoEVPGetIV() if ivLen = 0

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The ivLen may be 0 for ECB and in this case we can skip the call to
DoEVPGetIV().

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
This commit is contained in:
Stefan Berger 2023-02-11 13:10:09 -05:00 committed by Stefan Berger
parent f531ad6927
commit 06ada5ad3e
1 changed files with 2 additions and 2 deletions
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4
src/tpm2/crypto/openssl/CryptSym.c
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@ -621,7 +621,7 @@ CryptSymmetricEncrypt(
ERROR_RETURN(TPM_RC_FAILURE);
ivInOut->t.size = ivLen;
if (DoEVPGetIV(ctx, ivInOut->t.buffer, ivInOut->t.size))
if (ivLen > 0 && DoEVPGetIV(ctx, ivInOut->t.buffer, ivInOut->t.size))
ERROR_RETURN(TPM_RC_FAILURE);
}
Exit:
@ -744,7 +744,7 @@ CryptSymmetricDecrypt(
ERROR_RETURN(TPM_RC_FAILURE);
ivInOut->t.size = ivLen;
if (DoEVPGetIV(ctx, ivInOut->t.buffer, ivInOut->t.size))
if (ivLen > 0 && DoEVPGetIV(ctx, ivInOut->t.buffer, ivInOut->t.size))
ERROR_RETURN(TPM_RC_FAILURE);
}