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Always enforce the metadata signature has a valid timestamp

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Although this is something that we have always done on the LVFS, corporate
deployments that resign the firmware or metadata might not be signing the files
in the same way.

Always require a timestamp to prevent allowing an inadvertent rollback attack.
This commit is contained in:
Richard Hughes 2020-05-29 07:51:38 +01:00
parent a22310374e
commit 64ebf91124
1 changed files with 8 additions and 2 deletions
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10
src/fu-engine.c
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@ -3175,8 +3175,14 @@ fu_engine_validate_result_timestamp (JcatResult *jcat_result,
g_return_val_if_fail (JCAT_IS_RESULT (jcat_result), FALSE);
g_return_val_if_fail (JCAT_IS_RESULT (jcat_result_old), FALSE);
if (jcat_result_get_timestamp (jcat_result) > 0 &&
jcat_result_get_timestamp (jcat_result_old) > 0) {
if (jcat_result_get_timestamp (jcat_result) == 0) {
g_set_error (error,
FWUPD_ERROR,
FWUPD_ERROR_INVALID_FILE,
"no signing timestamp");
return FALSE;
}
if (jcat_result_get_timestamp (jcat_result_old) > 0) {
delta = jcat_result_get_timestamp (jcat_result) -
jcat_result_get_timestamp (jcat_result_old);
}