efi_loader: signature: fix a size check against revocation list
Since the size check against an entry in efi_search_siglist() is
incorrect, this function will never find out a to-be-matched certificate
and its associated revocation time in the signature list.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
diff --git a/lib/efi_loader/efi_signature.c b/lib/efi_loader/efi_signature.c
index e05c471..cd2df46 100644
--- a/lib/efi_loader/efi_signature.c
+++ b/lib/efi_loader/efi_signature.c
@@ -433,10 +433,11 @@
* time64_t revocation_time;
* };
*/
- if ((sig_data->size == SHA256_SUM_LEN) &&
- !memcmp(sig_data->data, hash, SHA256_SUM_LEN)) {
+ if ((sig_data->size >= SHA256_SUM_LEN + sizeof(time64_t)) &&
+ !memcmp(sig_data->data, msg, SHA256_SUM_LEN)) {
memcpy(revoc_time, sig_data->data + SHA256_SUM_LEN,
sizeof(*revoc_time));
+ EFI_PRINT("revocation time: 0x%llx\n", *revoc_time);
found = true;
goto out;
}