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Better detect, handle and warn when a custom ticket is malformed.

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jakcron 2021-10-22 04:12:03 +08:00
parent 620d0609d6
commit be0f5c29e0
1 changed files with 5 additions and 3 deletions
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8
src/KeyBag.cpp
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@ -568,10 +568,12 @@ void nstool::KeyBagInitializer::importTicket(const tc::io::Path& tik_path)
byte_t common_key_index = tik.getBody().getCommonKeyId();
// work around for bad scene tickets where they don't set the commonkey id field (detect scene ticket with ffff.... signature)
auto signature_bytes = tik.getSignature().getSignature();
if (common_key_index != rights_id[15] && *((uint64_t*)signature_bytes.data()) == (uint64_t)0xffffffffffffffff)
if (common_key_index == 0 && *((uint64_t*)tik.getSignature().getSignature().data()) == (uint64_t)0xffffffffffffffff)
{
common_key_index = rights_id[15];
fmt::print("[WARNING] Ticket \"{:s}\" is fake-signed, and NCA decryption may fail if ticket was incorrectly generated.", tc::cli::FormatUtil::formatBytesAsString(rights_id.data(), rights_id.size(), true, ""));
// the keygeneration was included in the rights_id from keygeneration 0x03 and onwards, so in those cases we can copy from there
if (rights_id[15] >= 0x03)
common_key_index = rights_id[15];
}
// convert key_generation