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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2023-11-28 18:05:38 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2023-11-28 18:11:02 -0500 |
| commit | 2ca1b46b68dc7b8ab8a42e315d49857a2c0a868d (patch) | |
| tree | 4c70ea95dc28b960d2e911bf8726c6e32c60b7de | |
| parent | 36b4d7d447593831d3addf358a5921ec8947b1f1 (diff) | |
| download | openssl_tpm2_engine-2ca1b46b68dc7b8ab8a42e315d49857a2c0a868d.tar.gz | |
tpm2-common: fix encrypted secret size
It's been reported that the ASN.1 representation of the encrypted
secret is always two bytes too big and zero padded at the end. This
is because the written parameter isn't reset to zero when the secret
was Marshalled and is in fact left at 2 from a previous use. Fix by
initializing to zero before marshalling.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
| -rw-r--r-- | src/libcommon/tpm2-common.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcommon/tpm2-common.c b/src/libcommon/tpm2-common.c index 71c66d2..3d70ea6 100644 --- a/src/libcommon/tpm2-common.c +++ b/src/libcommon/tpm2-common.c @@ -3107,6 +3107,7 @@ TPM_RC tpm2_outerwrap(EVP_PKEY *parent, &null_2b, &null_2b, SHA256_DIGEST_LENGTH*8); /* OK the ephermeral public point is now the encrypted secret */ size = sizeof(ephemeral_pt); + written = 0; buf = enc_secret->secret; TSS_TPM2B_ECC_POINT_Marshal(&ephemeral_pt, &written, &buf, &size); |