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[backend] bs_signer: fix content length patching for iso files #9949

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Jul 23, 2020
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[backend] bs_signer: fix content length patching for iso files #9949

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6 changes: 4 additions & 2 deletions src/backend/bs_signer
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Original file line number Diff line number Diff line change
Expand Up @@ -189,7 +189,8 @@ sub signisofiles {
writeblk($fd, $e->[1], $sig . ("\0" x (2048 - length($sig))));
my $dirblk = readblk($fd, $e->[3]);
# patch in new content len
substr($dirblk, $e->[4] + 10, 4) = pack('V', length($sig));
substr($dirblk, $e->[4] + 10, 4) = pack('V', length($sig)); # little endian
substr($dirblk, $e->[4] + 14, 4) = pack('N', length($sig)); # big endian
writeblk($fd, $e->[3], $dirblk);
$signed++;
}
Expand All @@ -203,7 +204,8 @@ sub signisofiles {
writeblk($fd, $e->[1], $pubkey . ("\0" x (8192 - length($pubkey))));
my $dirblk = readblk($fd, $e->[3]);
# patch in new content len
substr($dirblk, $e->[4] + 10, 4) = pack('V', length($pubkey));
substr($dirblk, $e->[4] + 10, 4) = pack('V', length($pubkey)); # little endian
substr($dirblk, $e->[4] + 14, 4) = pack('N', length($pubkey)); # big endian
writeblk($fd, $e->[3], $dirblk);
$signed++;
}
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