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LibWeb: Fix X448 PCKS#8 key export format

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The ASN1 structure for PCKS#8 was wrong and missing one wrapping of the
key in a OctetString.

The issue was discovered while implementing `wrapKey` and `unwrapKey` in
the next commits.
This commit is contained in:
devgianlu
2024-12-14 11:19:16 +01:00
committed by Andreas Kling
parent 89f1f3f31c
commit 06733bea48
2 changed files with 13 additions and 11 deletions
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5
Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp
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@@ -5447,8 +5447,11 @@ WebIDL::ExceptionOr<GC::Ref<JS::Object>> X448::export_key(Bindings::KeyFormat fo
// * Set the privateKeyAlgorithm field to a PrivateKeyAlgorithmIdentifier ASN.1 type with the following properties:
// * Set the algorithm object identifier to the id-X448 OID defined in [RFC8410].
// * Set the privateKey field to the result of DER-encoding a CurvePrivateKey ASN.1 type, as defined in Section 7 of [RFC8410], that represents the X448 private key represented by the [[handle]] internal slot of key
::Crypto::ASN1::Encoder encoder;
TRY_OR_THROW_OOM(m_realm->vm(), encoder.write(key_data.bytes()));
auto x448_oid = ::Crypto::ASN1::x448_oid;
auto data = TRY_OR_THROW_OOM(m_realm->vm(), ::Crypto::PK::wrap_in_private_key_info(key_data, x448_oid));
auto data = TRY_OR_THROW_OOM(m_realm->vm(), ::Crypto::PK::wrap_in_private_key_info(encoder.finish(), x448_oid));
// 3. Let result be a new ArrayBuffer associated with the relevant global object of this [HTML], and containing data.
return JS::ArrayBuffer::create(m_realm, data);