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LibWeb: Implement AES-GCM.getKeyLength

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stelar7 2024-10-31 15:57:19 +01:00 committed by Andreas Kling
parent a733e2a31c
commit 80d37a6def
3 changed files with 28 additions and 0 deletions
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12
Userland/Libraries/LibWeb/Crypto/CryptoAlgorithms.cpp
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@ -1757,6 +1757,18 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::ArrayBuffer>> AesCtr::decrypt(Algorithm
return JS::ArrayBuffer::create(m_realm, plaintext);
}
WebIDL::ExceptionOr<JS::Value> AesGcm::get_key_length(AlgorithmParams const& params)
{
// 1. If the length member of normalizedDerivedKeyAlgorithm is not 128, 192 or 256, then throw a OperationError.
auto const& normalized_algorithm = static_cast<AesDerivedKeyParams const&>(params);
auto length = normalized_algorithm.length;
if (length != 128 && length != 192 && length != 256)
return WebIDL::OperationError::create(m_realm, "Invalid key length"_string);
// 2. Return the length member of normalizedDerivedKeyAlgorithm.
return JS::Value(length);
}
// https://w3c.github.io/webcrypto/#hkdf-operations
WebIDL::ExceptionOr<JS::NonnullGCPtr<CryptoKey>> HKDF::import_key(AlgorithmParams const&, Bindings::KeyFormat format, CryptoKey::InternalKeyData key_data, bool extractable, Vector<Bindings::KeyUsage> const& key_usages)
{

13
Userland/Libraries/LibWeb/Crypto/CryptoAlgorithms.h
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@ -362,6 +362,19 @@ private:
}
};
class AesGcm : public AlgorithmMethods {
public:
virtual WebIDL::ExceptionOr<JS::Value> get_key_length(AlgorithmParams const&) override;
static NonnullOwnPtr<AlgorithmMethods> create(JS::Realm& realm) { return adopt_own(*new AesGcm(realm)); }
private:
explicit AesGcm(JS::Realm& realm)
: AlgorithmMethods(realm)
{
}
};
class HKDF : public AlgorithmMethods {
public:
virtual WebIDL::ExceptionOr<JS::NonnullGCPtr<CryptoKey>> import_key(AlgorithmParams const&, Bindings::KeyFormat, CryptoKey::InternalKeyData, bool, Vector<Bindings::KeyUsage> const&) override;

3
Userland/Libraries/LibWeb/Crypto/SubtleCrypto.cpp
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@ -784,6 +784,9 @@ SupportedAlgorithmsMap supported_algorithms()
define_an_algorithm<AesCtr, AesDerivedKeyParams>("get key length"_string, "AES-CTR"_string);
define_an_algorithm<AesCtr, AesKeyGenParams>("generateKey"_string, "AES-CTR"_string);
// https://w3c.github.io/webcrypto/#aes-gcm-registration
define_an_algorithm<AesGcm, AesDerivedKeyParams>("get key length"_string, "AES-GCM"_string);
// https://w3c.github.io/webcrypto/#hkdf
define_an_algorithm<HKDF>("importKey"_string, "HKDF"_string);
define_an_algorithm<HKDF, HKDFParams>("deriveBits"_string, "HKDF"_string);