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From e4261984374556da65c9d46097d5a1200b335c0c Mon Sep 17 00:00:00 2001
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From: Juergen Repp <juergen.repp@sit.fraunhofer.de>
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Date: Sat, 19 Feb 2022 12:59:32 +0100
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Subject: [PATCH] tpm2: Do not call EVP_PKEY_CTX_set0_rsa_oaep_label() for
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label of size 0 (OSSL 3)
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Openssl 3.0 did return an error if EVP_PKEY_CTX_set0_rsa_oaep_label was called
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with label size 0. The function should only be called if the size of the label
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is greater 0.
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With this fix TPM2_RSA_Encrypt/Decrypt did work with OpenSSL 1.1 and 3.0
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for encryption without label.
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Signed-off-by: Juergen Repp <juergen.repp@sit.fraunhofer.de>
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---
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src/tpm2/crypto/openssl/CryptRsa.c | 5 ++---
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1 file changed, 2 insertions(+), 3 deletions(-)
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diff --git a/src/tpm2/crypto/openssl/CryptRsa.c b/src/tpm2/crypto/openssl/CryptRsa.c
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index 4ed04384feb0..b5d6b6c3be82 100644
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--- a/src/tpm2/crypto/openssl/CryptRsa.c
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+++ b/src/tpm2/crypto/openssl/CryptRsa.c
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@@ -1356,10 +1356,9 @@ CryptRsaEncrypt(
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if (tmp == NULL)
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ERROR_RETURN(TPM_RC_FAILURE);
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memcpy(tmp, label->buffer, label->size);
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+ if (EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, tmp, label->size) <= 0)
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+ ERROR_RETURN(TPM_RC_FAILURE);
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}
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- // label->size == 0 is supported
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- if (EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, tmp, label->size) <= 0)
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- ERROR_RETURN(TPM_RC_FAILURE);
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tmp = NULL;
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break;
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default:
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--
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2.36.0.44.g0f828332d5ac
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