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/* 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,
#ifndef DOM_QUOTA_CIPHERSTRATEGYUTILS_H_
#define DOM_QUOTA_CIPHERSTRATEGYUTILS_H_
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstdint>
#include "ErrorList.h"
#include "ScopedNSSTypes.h"
#include "mozilla/Assertions.h"
#include "mozilla/Maybe.h"
#include "mozilla/Result.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/Span.h"
#include "pk11pub.h"
namespace mozilla::dom::quota {
template <typename KeyType>
Result<KeyType, nsresult> GenerateKey() {
const auto slot = UniquePK11SlotInfo{PK11_GetInternalSlot()};
if (slot == nullptr) {
return Err(NS_ERROR_FAILURE);
}
const auto symKey = UniquePK11SymKey{PK11_KeyGen(
slot.get(), CKM_CHACHA20_KEY_GEN, nullptr, sizeof(KeyType), nullptr)};
if (symKey == nullptr) {
return Err(NS_ERROR_FAILURE);
}
if (PK11_ExtractKeyValue(symKey.get()) != SECSuccess) {
return Err(NS_ERROR_FAILURE);
}
// No need to free keyData as it is a buffer managed by symKey.
SECItem* keyData = PK11_GetKeyData(symKey.get());
if (keyData == nullptr) {
return Err(NS_ERROR_FAILURE);
}
KeyType key;
MOZ_RELEASE_ASSERT(keyData->len == key.size());
std::copy(keyData->data, keyData->data + key.size(), key.data());
return key;
}
template <size_t N>
std::array<uint8_t, N> MakeRandomData() {
std::array<uint8_t, N> res;
const auto rv = PK11_GenerateRandom(res.data(), res.size());
/// XXX Allow return of error code to handle this gracefully.
MOZ_RELEASE_ASSERT(rv == SECSuccess);
return res;
}
template <typename KeyType>
Span<const uint8_t> SerializeKey(const KeyType& aKey) {
return Span(aKey);
}
template <typename KeyType>
Maybe<KeyType> DeserializeKey(const Span<const uint8_t>& aSerializedKey) {
KeyType res;
if (res.size() != aSerializedKey.size()) {
return Nothing();
}
std::copy(aSerializedKey.cbegin(), aSerializedKey.cend(), res.begin());
return Some(res);
}
} // namespace mozilla::dom::quota
#endif // DOM_QUOTA_CIPHERSTRATEGYUTILS_H_