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Add _EC field definitions gleaned from https://www.blackhat.com/us-19/briefings/schedule/#breaking-through-another-side-bypassing-firmware-security-boundaries-from-embedded-controller-15902

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Hamish Coleman 2019-09-02 07:37:13 +08:00
parent a721a332a4
commit 944c63b013
1 changed files with 6 additions and 4 deletions
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10
scripts/FL2_copyIMG
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@ -415,13 +415,14 @@ sub _check {
}
my @fields = qw(
signature filesize imgsize unk1
unk2 maybe_csum all_00_1 all_00_2
signature version filesize imgsize hash_algo sign_algo
hash_crc16 header_crc16 unk1
);
my @values = unpack("a4VVVVVVV",$$buf);
my @values = unpack("a3CVVVVSSC",$$buf);
map { $self->{header}{$fields[$_]} = $values[$_] } (0..scalar(@fields)-1);
return undef if ($self->{header}{signature} ne "_EC\x01");
return undef if ($self->{header}{signature} ne "_EC");
return undef if ($self->{header}{version} != 1);
return undef if ($self->{header}{filesize} != $self->{filesize});
if (!defined($known->{$self->{filesize}})) {
@ -440,6 +441,7 @@ sub _check {
# significantly larger in size
$self->{flag}{trailer}="internal";
} else {
warn("unexpected filesize/imgsize results");
return undef;
}