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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_KeyAlgorithmProxy_h
#define mozilla_dom_KeyAlgorithmProxy_h
#include "pk11pub.h"
#include "js/StructuredClone.h"
#include "mozilla/dom/KeyAlgorithmBinding.h"
#include "mozilla/dom/WebCryptoCommon.h"
#define KEY_ALGORITHM_SC_VERSION 0x00000001
namespace mozilla {
namespace dom {
// A heap-safe variant of RsaHashedKeyAlgorithm
// The only difference is that it uses CryptoBuffer instead of Uint8Array
struct RsaHashedKeyAlgorithmStorage {
nsString mName;
KeyAlgorithm mHash;
uint16_t mModulusLength;
CryptoBuffer mPublicExponent;
bool
ToKeyAlgorithm(JSContext* aCx, RsaHashedKeyAlgorithm& aRsa) const
{
JS::Rooted<JSObject*> exponent(aCx, mPublicExponent.ToUint8Array(aCx));
if (!exponent) {
return false;
}
aRsa.mName = mName;
aRsa.mModulusLength = mModulusLength;
aRsa.mHash.mName = mHash.mName;
aRsa.mPublicExponent.Init(exponent);
aRsa.mPublicExponent.ComputeLengthAndData();
return true;
}
};
// A heap-safe variant of DhKeyAlgorithm
// The only difference is that it uses CryptoBuffers instead of Uint8Arrays
struct DhKeyAlgorithmStorage {
nsString mName;
CryptoBuffer mPrime;
CryptoBuffer mGenerator;
bool
ToKeyAlgorithm(JSContext* aCx, DhKeyAlgorithm& aDh) const
{
JS::Rooted<JSObject*> prime(aCx, mPrime.ToUint8Array(aCx));
if (!prime) {
return false;
}
JS::Rooted<JSObject*> generator(aCx, mGenerator.ToUint8Array(aCx));
if (!generator) {
return false;
}
aDh.mName = mName;
aDh.mPrime.Init(prime);
aDh.mPrime.ComputeLengthAndData();
aDh.mGenerator.Init(generator);
aDh.mGenerator.ComputeLengthAndData();
return true;
}
};
// This class encapuslates a KeyAlgorithm object, and adds several
// methods that make WebCrypto operations simpler.
struct KeyAlgorithmProxy
{
enum KeyAlgorithmType {
AES,
HMAC,
RSA,
EC,
DH,
};
KeyAlgorithmType mType;
// Plain is always populated with the algorithm name
// Others are only populated for the corresponding key type
nsString mName;
AesKeyAlgorithm mAes;
HmacKeyAlgorithm mHmac;
RsaHashedKeyAlgorithmStorage mRsa;
EcKeyAlgorithm mEc;
DhKeyAlgorithmStorage mDh;
// Structured clone
bool WriteStructuredClone(JSStructuredCloneWriter* aWriter) const;
bool ReadStructuredClone(JSStructuredCloneReader* aReader);
// Extract various forms of derived information
CK_MECHANISM_TYPE Mechanism() const;
nsString JwkAlg() const;
// And in static form for calling on raw KeyAlgorithm dictionaries
static CK_MECHANISM_TYPE GetMechanism(const KeyAlgorithm& aAlgorithm);
static CK_MECHANISM_TYPE GetMechanism(const HmacKeyAlgorithm& aAlgorithm);
static nsString GetJwkAlg(const KeyAlgorithm& aAlgorithm);
// Construction of the various algorithm types
void
MakeAes(const nsString& aName, uint32_t aLength)
{
mType = AES;
mName = aName;
mAes.mName = aName;
mAes.mLength = aLength;
}
void
MakeHmac(uint32_t aLength, const nsString& aHashName)
{
mType = HMAC;
mName = NS_LITERAL_STRING(WEBCRYPTO_ALG_HMAC);
mHmac.mName = NS_LITERAL_STRING(WEBCRYPTO_ALG_HMAC);
mHmac.mLength = aLength;
mHmac.mHash.mName = aHashName;
}
bool
MakeRsa(const nsString& aName, uint32_t aModulusLength,
const CryptoBuffer& aPublicExponent, const nsString& aHashName)
{
mType = RSA;
mName = aName;
mRsa.mName = aName;
mRsa.mModulusLength = aModulusLength;
mRsa.mHash.mName = aHashName;
if (!mRsa.mPublicExponent.Assign(aPublicExponent)) {
return false;
}
return true;
}
void
MakeEc(const nsString& aName, const nsString& aNamedCurve)
{
mType = EC;
mName = aName;
mEc.mName = aName;
mEc.mNamedCurve = aNamedCurve;
}
bool
MakeDh(const nsString& aName, const CryptoBuffer& aPrime,
const CryptoBuffer& aGenerator)
{
mType = DH;
mName = aName;
mDh.mName = aName;
if (!mDh.mPrime.Assign(aPrime)) {
return false;
}
if (!mDh.mGenerator.Assign(aGenerator)) {
return false;
}
return true;
}
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_KeyAlgorithmProxy_h
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