LibWeb: Implement SubtleCrypto.generateKey for RSA-OAEP

This patch implements and tests window.crypto.sublte.generateKey with an RSA-OAEP algorithm. In order for the types to be happy, the KeyAlgorithms objects are moved to their own .h/.cpp pair, and the new KeyAlgorithms for RSA are added there.
2025-05-31 14:38:11 +00:00 · 2024-03-08 16:30:17 -07:00 · 2024-03-08 16:30:17 -07:00 · a9d240c647
commit a9d240c647
parent 008c89edde
12 changed files with 536 additions and 81 deletions
--- a/Userland/Libraries/LibWeb/Crypto/KeyAlgorithms.h
+++ b/Userland/Libraries/LibWeb/Crypto/KeyAlgorithms.h
@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2023, stelar7 <dudedbz@gmail.com>
+ * Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/String.h>
+#include <LibCrypto/BigInt/UnsignedBigInteger.h>
+#include <LibJS/Runtime/Object.h>
+#include <LibWeb/Crypto/CryptoAlgorithms.h>
+#include <LibWeb/WebIDL/ExceptionOr.h>
+
+namespace Web::Crypto {
+
+// https://w3c.github.io/webcrypto/#key-algorithm-dictionary
+class KeyAlgorithm : public JS::Object {
+    JS_OBJECT(KeyAlgorithm, Object);
+    JS_DECLARE_ALLOCATOR(KeyAlgorithm);
+
+public:
+    static JS::NonnullGCPtr<KeyAlgorithm> create(JS::Realm&);
+    virtual ~KeyAlgorithm() override = default;
+
+    String const& name() const { return m_name; }
+    void set_name(String name) { m_name = move(name); }
+
+    JS::Realm& realm() const { return m_realm; }
+
+protected:
+    KeyAlgorithm(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+
+private:
+    JS_DECLARE_NATIVE_FUNCTION(name_getter);
+
+    String m_name;
+    JS::Realm& m_realm;
+};
+
+// https://w3c.github.io/webcrypto/#RsaKeyAlgorithm-dictionary
+class RsaKeyAlgorithm : public KeyAlgorithm {
+    JS_OBJECT(RsaKeyAlgorithm, KeyAlgorithm);
+    JS_DECLARE_ALLOCATOR(RsaKeyAlgorithm);
+
+public:
+    static JS::NonnullGCPtr<RsaKeyAlgorithm> create(JS::Realm&);
+
+    virtual ~RsaKeyAlgorithm() override = default;
+
+    u32 modulus_length() const { return m_modulus_length; }
+    void set_modulus_length(u32 modulus_length) { m_modulus_length = modulus_length; }
+
+    JS::NonnullGCPtr<JS::Uint8Array> public_exponent() const { return m_public_exponent; }
+    void set_public_exponent(JS::NonnullGCPtr<JS::Uint8Array> public_exponent) { m_public_exponent = public_exponent; }
+    WebIDL::ExceptionOr<void> set_public_exponent(::Crypto::UnsignedBigInteger);
+
+protected:
+    RsaKeyAlgorithm(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Visitor&) override;
+
+private:
+    JS_DECLARE_NATIVE_FUNCTION(modulus_length_getter);
+    JS_DECLARE_NATIVE_FUNCTION(public_exponent_getter);
+
+    u32 m_modulus_length { 0 };
+    JS::NonnullGCPtr<JS::Uint8Array> m_public_exponent;
+};
+
+// https://w3c.github.io/webcrypto/#RsaHashedKeyAlgorithm-dictionary
+class RsaHashedKeyAlgorithm : public RsaKeyAlgorithm {
+    JS_OBJECT(RsaHashedKeyAlgorithm, RsaKeyAlgorithm);
+    JS_DECLARE_ALLOCATOR(RsaHashedKeyAlgorithm);
+
+public:
+    static JS::NonnullGCPtr<RsaHashedKeyAlgorithm> create(JS::Realm&);
+
+    virtual ~RsaHashedKeyAlgorithm() override = default;
+
+    HashAlgorithmIdentifier const& hash() const { return m_hash; }
+    void set_hash(HashAlgorithmIdentifier hash) { m_hash = move(hash); }
+
+protected:
+    RsaHashedKeyAlgorithm(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+
+private:
+    JS_DECLARE_NATIVE_FUNCTION(hash_getter);
+
+    HashAlgorithmIdentifier m_hash;
+};
+
+}