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LibTLS: Verify the certificate chain sent by the server

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With this change the certificate chain sent by the server will actually
be verified, instead of just checking the names of the certificates.

To determine if a certificate is signed by a root certificate, the list
of root certificates is now a HashMap mapping from the unique identifier
string to the certificate. This allows us to take the issuer of a
certificate and easily check if it is a root certificate. If a
certificate is not signed by a root certificate, we will check that it
is signed by the next certificate in the chain.

This also removes the ad-hoc checking of certificate validity from
multiple places, and moves all checking to the verify_chain.
This commit is contained in:
Michiel Visser 2022-02-21 22:25:34 +01:00 • committed by Ali Mohammad Pur
parent d5cef41bb6
commit fea5aeda0b
6 changed files with 162 additions and 47 deletions
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5
Userland/Libraries/LibTLS/Certificate.cpp
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@ -91,6 +91,11 @@ Optional<Certificate> Certificate::parse_asn1(ReadonlyBytes buffer, bool)
} while (0)
Certificate certificate;
auto copy_buffer_result = ByteBuffer::copy(buffer.data(), buffer.size());
if (copy_buffer_result.is_error())
return {};
certificate.original_asn1 = copy_buffer_result.release_value();
Crypto::ASN1::Decoder decoder { buffer };
// Certificate ::= Sequence {
// certificate TBSCertificate,