зеркало из https://github.com/mozilla/gecko-dev.git
117 строки
3.4 KiB
C++
117 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_KeyAlgorithmProxy_h
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#define mozilla_dom_KeyAlgorithmProxy_h
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#include "pk11pub.h"
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#include "js/StructuredClone.h"
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#include "mozilla/dom/KeyAlgorithmBinding.h"
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#include "mozilla/dom/WebCryptoCommon.h"
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#define KEY_ALGORITHM_SC_VERSION 0x00000001
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namespace mozilla {
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namespace dom {
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// A heap-safe variant of RsaHashedKeyAlgorithm
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// The only difference is that it uses CryptoBuffer instead of Uint8Array
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struct RsaHashedKeyAlgorithmStorage {
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nsString mName;
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KeyAlgorithm mHash;
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uint16_t mModulusLength;
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CryptoBuffer mPublicExponent;
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bool ToKeyAlgorithm(JSContext* aCx, RsaHashedKeyAlgorithm& aRsa) const {
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JS::Rooted<JSObject*> exponent(aCx, mPublicExponent.ToUint8Array(aCx));
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if (!exponent) {
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return false;
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}
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aRsa.mName = mName;
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aRsa.mModulusLength = mModulusLength;
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aRsa.mHash.mName = mHash.mName;
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aRsa.mPublicExponent.Init(exponent);
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aRsa.mPublicExponent.ComputeState();
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return true;
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}
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};
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// This class encapuslates a KeyAlgorithm object, and adds several
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// methods that make WebCrypto operations simpler.
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struct KeyAlgorithmProxy {
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enum KeyAlgorithmType {
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AES,
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HMAC,
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RSA,
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EC,
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};
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KeyAlgorithmType mType;
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// Plain is always populated with the algorithm name
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// Others are only populated for the corresponding key type
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nsString mName;
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AesKeyAlgorithm mAes;
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HmacKeyAlgorithm mHmac;
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RsaHashedKeyAlgorithmStorage mRsa;
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EcKeyAlgorithm mEc;
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// Structured clone
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bool WriteStructuredClone(JSStructuredCloneWriter* aWriter) const;
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bool ReadStructuredClone(JSStructuredCloneReader* aReader);
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// Extract various forms of derived information
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CK_MECHANISM_TYPE Mechanism() const;
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nsString JwkAlg() const;
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// And in static form for calling on raw KeyAlgorithm dictionaries
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static CK_MECHANISM_TYPE GetMechanism(const KeyAlgorithm& aAlgorithm);
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static CK_MECHANISM_TYPE GetMechanism(const HmacKeyAlgorithm& aAlgorithm);
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static nsString GetJwkAlg(const KeyAlgorithm& aAlgorithm);
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// Construction of the various algorithm types
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void MakeAes(const nsString& aName, uint32_t aLength) {
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mType = AES;
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mName = aName;
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mAes.mName = aName;
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mAes.mLength = aLength;
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}
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void MakeHmac(uint32_t aLength, const nsString& aHashName) {
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mType = HMAC;
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mName = NS_LITERAL_STRING(WEBCRYPTO_ALG_HMAC);
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mHmac.mName = NS_LITERAL_STRING(WEBCRYPTO_ALG_HMAC);
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mHmac.mLength = aLength;
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mHmac.mHash.mName = aHashName;
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}
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bool MakeRsa(const nsString& aName, uint32_t aModulusLength,
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const CryptoBuffer& aPublicExponent, const nsString& aHashName) {
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mType = RSA;
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mName = aName;
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mRsa.mName = aName;
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mRsa.mModulusLength = aModulusLength;
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mRsa.mHash.mName = aHashName;
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if (!mRsa.mPublicExponent.Assign(aPublicExponent)) {
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return false;
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}
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return true;
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}
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void MakeEc(const nsString& aName, const nsString& aNamedCurve) {
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mType = EC;
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mName = aName;
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mEc.mName = aName;
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mEc.mNamedCurve = aNamedCurve;
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}
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_KeyAlgorithmProxy_h
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