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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, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "DAPTelemetryBindings.h"
#include "mozilla/Logging.h"
#include "nsPromiseFlatString.h"
#include "nss.h"
#include "nsNSSComponent.h"
#include "secmodt.h"
#include "pk11pub.h"
#include "ScopedNSSTypes.h"
static mozilla::LazyLogModule sLogger("DAPTelemetry");
#undef LOG
#define LOG(...) MOZ_LOG(sLogger, mozilla::LogLevel::Debug, (__VA_ARGS__))
namespace mozilla {
NS_IMPL_ISUPPORTS(DAPTelemetry, nsIDAPTelemetry)
// This function was copied from pk11_hpke_unittest.cc
// And modified to take a Span.
static std::vector<uint8_t> Pkcs8(Span<const uint8_t> sk,
Span<const uint8_t> pk) {
// Only X25519 format.
std::vector<uint8_t> v(105);
v.assign({
0x30, 0x67, 0x02, 0x01, 0x00, 0x30, 0x14, 0x06, 0x07, 0x2a, 0x86, 0x48,
0xce, 0x3d, 0x02, 0x01, 0x06, 0x09, 0x2b, 0x06, 0x01, 0x04, 0x01, 0xda,
0x47, 0x0f, 0x01, 0x04, 0x4c, 0x30, 0x4a, 0x02, 0x01, 0x01, 0x04, 0x20,
});
v.insert(v.end(), sk.begin(), sk.end());
v.insert(v.end(), {
0xa1,
0x23,
0x03,
0x21,
0x00,
});
v.insert(v.end(), pk.begin(), pk.end());
return v;
}
// This function was copied from cpputil.h
static unsigned char* toUcharPtr(const uint8_t* v) {
return const_cast<unsigned char*>(static_cast<const unsigned char*>(v));
}
/// If successful this returns a pointer to a HpkeContext which must be
/// released using dapDestroyHpkeContext or PK11_HPKE_DestroyContext.
HpkeContext* dapSetupHpkeContextInternal(
const uint8_t* aKey, uint32_t aKeyLength, const uint8_t* aInfo,
uint32_t aInfoLength, SECKEYPublicKey* aPkE, SECKEYPrivateKey* aSkE,
nsTArray<uint8_t>* aOutputEncapsulatedKey) {
SECStatus status = PK11_HPKE_ValidateParameters(
HpkeDhKemX25519Sha256, HpkeKdfHkdfSha256, HpkeAeadAes128Gcm);
if (status != SECSuccess) {
MOZ_LOG(sLogger, mozilla::LogLevel::Error,
("Invalid HKPE parameters found."));
return nullptr;
}
UniqueHpkeContext context(
PK11_HPKE_NewContext(HpkeDhKemX25519Sha256, HpkeKdfHkdfSha256,
HpkeAeadAes128Gcm, nullptr, nullptr));
SECKEYPublicKey* pkR_raw = nullptr;
status = PK11_HPKE_Deserialize(context.get(), aKey, aKeyLength, &pkR_raw);
UniqueSECKEYPublicKey pkR(pkR_raw);
pkR_raw = nullptr;
if (status != SECSuccess) {
MOZ_LOG(sLogger, mozilla::LogLevel::Error,
("Failed to deserialize HPKE encryption key."));
return nullptr;
}
const SECItem hpkeInfo = {siBuffer, toUcharPtr(aInfo), aInfoLength};
status = PK11_HPKE_SetupS(context.get(), aPkE, aSkE, pkR.get(), &hpkeInfo);
if (status != SECSuccess) {
MOZ_LOG(sLogger, mozilla::LogLevel::Error, ("HPKE setup failed."));
return nullptr;
}
const SECItem* hpkeEncapKey = PK11_HPKE_GetEncapPubKey(context.get());
if (!hpkeEncapKey) {
MOZ_LOG(sLogger, mozilla::LogLevel::Error,
("Failed to get HPKE encapsulated public key."));
return nullptr;
}
aOutputEncapsulatedKey->AppendElements(hpkeEncapKey->data, hpkeEncapKey->len);
return context.release();
}
extern "C" {
/// Takes additional ephemeral keys to make everything deterministic for test
/// vectors.
/// If successful this returns a pointer to a HpkeContext which must be
/// released using dapDestroyHpkeContext or PK11_HPKE_DestroyContext.
HpkeContext* dapSetupHpkeContextForTesting(
const uint8_t* aKey, uint32_t aKeyLength, const uint8_t* aInfo,
uint32_t aInfoLength, const uint8_t* aPkEm, uint32_t aPkEmLength,
const uint8_t* aSkEm, uint32_t aSkEmLength,
nsTArray<uint8_t>* aOutputEncapsulatedKey) {
Span<const uint8_t> sk_e(aSkEm, aSkEm + aSkEmLength);
Span<const uint8_t> pk_e(aPkEm, aPkEm + aPkEmLength);
std::vector<uint8_t> pkcs8_e = Pkcs8(sk_e, pk_e);
MOZ_RELEASE_ASSERT(EnsureNSSInitializedChromeOrContent(),
"Could not initialize NSS.");
UniquePK11SlotInfo slot(PK11_GetInternalSlot());
MOZ_RELEASE_ASSERT(slot, "Failed to get slot.");
SECItem keys_e = {siBuffer, toUcharPtr(pkcs8_e.data()),
static_cast<unsigned int>(pkcs8_e.size())};
SECKEYPrivateKey* internal_skE_raw = nullptr;
SECStatus rv = PK11_ImportDERPrivateKeyInfoAndReturnKey(
slot.get(), &keys_e, nullptr, nullptr, false, false, KU_ALL,
&internal_skE_raw, nullptr);
UniqueSECKEYPrivateKey internal_skE(internal_skE_raw);
internal_skE_raw = nullptr;
MOZ_RELEASE_ASSERT(rv == SECSuccess, "Failed to import skE/pkE.");
UniqueSECKEYPublicKey internal_pkE(
SECKEY_ConvertToPublicKey(internal_skE.get()));
UniqueHpkeContext result(dapSetupHpkeContextInternal(
aKey, aKeyLength, aInfo, aInfoLength, internal_pkE.get(),
internal_skE.get(), aOutputEncapsulatedKey));
return result.release();
}
void dapDestroyHpkeContext(HpkeContext* aContext) {
PK11_HPKE_DestroyContext(aContext, true);
}
bool dapHpkeEncrypt(HpkeContext* aContext, const uint8_t* aAad,
uint32_t aAadLength, const uint8_t* aPlaintext,
uint32_t aPlaintextLength,
nsTArray<uint8_t>* aOutputShare) {
SECItem aad_si = {siBuffer, toUcharPtr(aAad), aAadLength};
SECItem plaintext_si = {siBuffer, toUcharPtr(aPlaintext), aPlaintextLength};
SECItem* chCt = nullptr;
SECStatus rv = PK11_HPKE_Seal(aContext, &aad_si, &plaintext_si, &chCt);
if (rv != SECSuccess) {
return false;
}
UniqueSECItem ct(chCt);
aOutputShare->AppendElements(ct->data, ct->len);
return true;
}
bool dapHpkeEncryptOneshot(const uint8_t* aKey, uint32_t aKeyLength,
const uint8_t* aInfo, uint32_t aInfoLength,
const uint8_t* aAad, uint32_t aAadLength,
const uint8_t* aPlaintext, uint32_t aPlaintextLength,
nsTArray<uint8_t>* aOutputEncapsulatedKey,
nsTArray<uint8_t>* aOutputShare) {
MOZ_RELEASE_ASSERT(EnsureNSSInitializedChromeOrContent(),
"Could not initialize NSS.");
UniqueHpkeContext context(
dapSetupHpkeContextInternal(aKey, aKeyLength, aInfo, aInfoLength, nullptr,
nullptr, aOutputEncapsulatedKey));
if (!context) {
return false;
}
return dapHpkeEncrypt(context.get(), aAad, aAadLength, aPlaintext,
aPlaintextLength, aOutputShare);
}
}
NS_IMETHODIMP DAPTelemetry::GetReportU8(
const nsTArray<uint8_t>& aLeaderHpkeConfig,
const nsTArray<uint8_t>& aHelperHpkeConfig, uint8_t aMeasurement,
const nsTArray<uint8_t>& aTaskID, const uint64_t aTimePrecision,
nsTArray<uint8_t>& aOutReport) {
MOZ_RELEASE_ASSERT(aTaskID.Length() == 32, "TaskID must have 32 bytes.");
if (!dapGetReportU8(&aLeaderHpkeConfig, &aHelperHpkeConfig, aMeasurement,
&aTaskID, aTimePrecision, &aOutReport)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP DAPTelemetry::GetReportVecU8(
const nsTArray<uint8_t>& aLeaderHpkeConfig,
const nsTArray<uint8_t>& aHelperHpkeConfig,
const nsTArray<uint8_t>& aMeasurement, const nsTArray<uint8_t>& aTaskID,
const uint64_t aTimePrecision, nsTArray<uint8_t>& aOutReport) {
MOZ_RELEASE_ASSERT(aTaskID.Length() == 32, "TaskID must have 32 bytes.");
if (!dapGetReportVecU8(&aLeaderHpkeConfig, &aHelperHpkeConfig, &aMeasurement,
&aTaskID, aTimePrecision, &aOutReport)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
NS_IMETHODIMP DAPTelemetry::GetReportVecU16(
const nsTArray<uint8_t>& aLeaderHpkeConfig,
const nsTArray<uint8_t>& aHelperHpkeConfig,
const nsTArray<uint16_t>& aMeasurement, const nsTArray<uint8_t>& aTaskID,
const uint64_t aTimePrecision, nsTArray<uint8_t>& aOutReport) {
MOZ_RELEASE_ASSERT(aTaskID.Length() == 32, "TaskID must have 32 bytes.");
if (!dapGetReportVecU16(&aLeaderHpkeConfig, &aHelperHpkeConfig, &aMeasurement,
&aTaskID, aTimePrecision, &aOutReport)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
} // namespace mozilla
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