mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-25 05:41:12 +00:00
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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_SRIMetadata_h
|
|
#define mozilla_dom_SRIMetadata_h
|
|
|
|
#include "nsTArray.h"
|
|
#include "nsString.h"
|
|
#include "SRICheck.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
class SRIMetadata final {
|
|
friend class SRICheck;
|
|
|
|
public:
|
|
static const uint32_t MAX_ALTERNATE_HASHES = 256;
|
|
static const int8_t UNKNOWN_ALGORITHM = -1;
|
|
|
|
/**
|
|
* Create an empty metadata object.
|
|
*/
|
|
SRIMetadata() : mAlgorithmType(UNKNOWN_ALGORITHM), mEmpty(true) {}
|
|
|
|
/**
|
|
* Split a string token into the components of an SRI metadata
|
|
* attribute.
|
|
*/
|
|
explicit SRIMetadata(const nsACString& aToken);
|
|
|
|
/**
|
|
* Returns true when this object's hash algorithm is weaker than the
|
|
* other object's hash algorithm.
|
|
*/
|
|
bool operator<(const SRIMetadata& aOther) const;
|
|
|
|
/**
|
|
* Not implemented. Should not be used.
|
|
*/
|
|
bool operator>(const SRIMetadata& aOther) const;
|
|
|
|
/**
|
|
* Add another metadata's hash to this one.
|
|
*/
|
|
SRIMetadata& operator+=(const SRIMetadata& aOther);
|
|
|
|
/**
|
|
* Returns true when the two metadata use the same hash algorithm.
|
|
*/
|
|
bool operator==(const SRIMetadata& aOther) const;
|
|
|
|
bool IsEmpty() const { return mEmpty; }
|
|
bool IsMalformed() const { return mHashes.IsEmpty() || mAlgorithm.IsEmpty(); }
|
|
bool IsAlgorithmSupported() const {
|
|
return mAlgorithmType != UNKNOWN_ALGORITHM;
|
|
}
|
|
bool IsValid() const { return !IsMalformed() && IsAlgorithmSupported(); }
|
|
|
|
uint32_t HashCount() const { return mHashes.Length(); }
|
|
void GetHash(uint32_t aIndex, nsCString* outHash) const;
|
|
void GetAlgorithm(nsCString* outAlg) const { *outAlg = mAlgorithm; }
|
|
void GetHashType(int8_t* outType, uint32_t* outLength) const;
|
|
|
|
const nsString& GetIntegrityString() const { return mIntegrityString; }
|
|
|
|
// Return true if:
|
|
// * this SRI is empty
|
|
// * the other SRI has a stronger hash algorithm
|
|
// * the other SRI has the same hash algorithm and also the same set of values
|
|
// otherwise, return false.
|
|
//
|
|
// This method simply checks if the other SRI is stronger or identical to this
|
|
// one, so that a load that has been checked against that other SRI has the
|
|
// same or higher level of trust than this SRI provides.
|
|
bool CanTrustBeDelegatedTo(const SRIMetadata& aOther) const;
|
|
|
|
private:
|
|
CopyableTArray<nsCString> mHashes;
|
|
nsString mIntegrityString;
|
|
nsCString mAlgorithm;
|
|
int8_t mAlgorithmType;
|
|
bool mEmpty;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_SRIMetadata_h
|