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From 2781de8cb60d0e8efb72d57eb1178f2f6df9415c Mon Sep 17 00:00:00 2001
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From: Jerry Snitselaar <jsnitsel@redhat.com>
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Date: Tue, 2 Aug 2022 11:59:06 -0700
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Subject: [PATCH 4/9] tpm2_eventlog: clean up some magic numbers
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Make the code a bit clearer by making it clear
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we are subtracting the size of the EFI_GUID member
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from the EFI_SIGNATURE_DATA size.
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Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
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---
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lib/tpm2_eventlog_yaml.c | 12 ++++++------
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1 file changed, 6 insertions(+), 6 deletions(-)
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diff --git a/lib/tpm2_eventlog_yaml.c b/lib/tpm2_eventlog_yaml.c
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index 647a2225..fee78027 100644
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--- a/lib/tpm2_eventlog_yaml.c
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+++ b/lib/tpm2_eventlog_yaml.c
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@@ -374,13 +374,13 @@ static bool yaml_uefi_var(UEFI_VARIABLE_DATA *data, size_t size, UINT32 type,
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for (i = 0; i < signatures; i++) {
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EFI_SIGNATURE_DATA *s = (EFI_SIGNATURE_DATA *)signature;
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char *sdata = calloc (1,
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- BYTES_TO_HEX_STRING_SIZE(slist->SignatureSize-16));
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+ BYTES_TO_HEX_STRING_SIZE(slist->SignatureSize - sizeof(EFI_GUID)));
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if (sdata == NULL) {
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LOG_ERR("Failled to allocate data: %s\n", strerror(errno));
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return false;
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}
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- bytes_to_str(s->SignatureData, slist->SignatureSize-16,
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- sdata, BYTES_TO_HEX_STRING_SIZE(slist->SignatureSize-16));
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+ bytes_to_str(s->SignatureData, slist->SignatureSize - sizeof(EFI_GUID),
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+ sdata, BYTES_TO_HEX_STRING_SIZE(slist->SignatureSize - sizeof(EFI_GUID)));
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guid_unparse_lower(s->SignatureOwner, uuidstr);
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tpm2_tool_output(" - SignatureOwner: %s\n"
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" SignatureData: %s\n",
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@@ -426,13 +426,13 @@ static bool yaml_uefi_var(UEFI_VARIABLE_DATA *data, size_t size, UINT32 type,
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EFI_SIGNATURE_DATA *s= (EFI_SIGNATURE_DATA *)&data->UnicodeName[
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data->UnicodeNameLength];
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char *sdata = calloc (1,
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- BYTES_TO_HEX_STRING_SIZE(data->VariableDataLength - 16));
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+ BYTES_TO_HEX_STRING_SIZE(data->VariableDataLength - sizeof(EFI_GUID)));
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if (sdata == NULL) {
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LOG_ERR("Failled to allocate data: %s\n", strerror(errno));
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return false;
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}
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- bytes_to_str(s->SignatureData, data->VariableDataLength - 16,
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- sdata, BYTES_TO_HEX_STRING_SIZE(data->VariableDataLength - 16));
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+ bytes_to_str(s->SignatureData, data->VariableDataLength - sizeof(EFI_GUID),
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+ sdata, BYTES_TO_HEX_STRING_SIZE(data->VariableDataLength - sizeof(EFI_GUID)));
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guid_unparse_lower(s->SignatureOwner, uuidstr);
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tpm2_tool_output(" - SignatureOwner: %s\n"
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" SignatureData: %s\n",
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--
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2.37.3
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