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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et 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/. */
#include "IPCClientCertsParent.h"
#include "ScopedNSSTypes.h"
#include "nsNSSComponent.h"
#include "nsNSSIOLayer.h"
#include "mozilla/SyncRunnable.h"
#include "mozilla/ipc/BackgroundParent.h"
namespace mozilla::psm {
IPCClientCertsParent::IPCClientCertsParent() = default;
// When the IPC client certs module needs to find certificate and key objects
// in the socket process, it will cause this function to be called in the
// parent process. The parent process needs to find all certificates with
// private keys (because these are potential client certificates).
mozilla::ipc::IPCResult IPCClientCertsParent::RecvFindObjects(
nsTArray<IPCClientCertObject>* aObjects) {
nsCOMPtr<nsIEventTarget> socketThread(
do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID));
if (!socketThread) {
return IPC_OK();
}
// Look for client certificates on the socket thread.
UniqueCERTCertList certList;
mozilla::SyncRunnable::DispatchToThread(
socketThread, NS_NewRunnableFunction(
"IPCClientCertsParent::RecvFindObjects", [&certList]() {
certList =
psm::FindClientCertificatesWithPrivateKeys();
}));
if (!certList) {
return IPC_OK();
}
CERTCertListNode* n = CERT_LIST_HEAD(certList);
while (!CERT_LIST_END(n, certList)) {
nsTArray<uint8_t> certDER(n->cert->derCert.data, n->cert->derCert.len);
uint32_t slotType;
UniqueSECKEYPublicKey pubkey(CERT_ExtractPublicKey(n->cert));
if (!pubkey) {
return IPC_OK();
}
switch (SECKEY_GetPublicKeyType(pubkey.get())) {
case rsaKey:
case rsaPssKey: {
slotType = PK11_DoesMechanism(n->cert->slot, CKM_RSA_PKCS_PSS)
? kIPCClientCertsSlotTypeModern
: kIPCClientCertsSlotTypeLegacy;
nsTArray<uint8_t> modulus(pubkey->u.rsa.modulus.data,
pubkey->u.rsa.modulus.len);
RSAKey rsakey(modulus, certDER, slotType);
aObjects->AppendElement(std::move(rsakey));
break;
}
case ecKey: {
slotType = kIPCClientCertsSlotTypeModern;
nsTArray<uint8_t> params(pubkey->u.ec.DEREncodedParams.data,
pubkey->u.ec.DEREncodedParams.len);
ECKey eckey(params, certDER, slotType);
aObjects->AppendElement(std::move(eckey));
break;
}
default:
n = CERT_LIST_NEXT(n);
continue;
}
Certificate cert(certDER, slotType);
aObjects->AppendElement(std::move(cert));
n = CERT_LIST_NEXT(n);
}
return IPC_OK();
}
// When the IPC client certs module needs to sign data using a key managed by
// the parent process, it will cause this function to be called in the parent
// process. The parent process needs to find the key corresponding to the given
// certificate and sign the given data with the given parameters.
mozilla::ipc::IPCResult IPCClientCertsParent::RecvSign(ByteArray aCert,
ByteArray aData,
ByteArray aParams,
ByteArray* aSignature) {
SECItem certItem = {siBuffer, const_cast<uint8_t*>(aCert.data().Elements()),
static_cast<unsigned int>(aCert.data().Length())};
aSignature->data().Clear();
UniqueCERTCertificate cert(CERT_NewTempCertificate(
CERT_GetDefaultCertDB(), &certItem, nullptr, false, true));
if (!cert) {
return IPC_OK();
}
UniqueSECKEYPrivateKey key(PK11_FindKeyByAnyCert(cert.get(), nullptr));
if (!key) {
return IPC_OK();
}
SECItem params = {siBuffer, aParams.data().Elements(),
static_cast<unsigned int>(aParams.data().Length())};
SECItem* paramsPtr = aParams.data().Length() > 0 ? ¶ms : nullptr;
CK_MECHANISM_TYPE mechanism;
switch (key->keyType) {
case ecKey:
mechanism = CKM_ECDSA;
break;
case rsaKey:
mechanism = aParams.data().Length() > 0 ? CKM_RSA_PKCS_PSS : CKM_RSA_PKCS;
break;
default:
return IPC_OK();
}
uint32_t len = PK11_SignatureLen(key.get());
UniqueSECItem sig(::SECITEM_AllocItem(nullptr, nullptr, len));
SECItem hash = {siBuffer, aData.data().Elements(),
static_cast<unsigned int>(aData.data().Length())};
SECStatus srv =
PK11_SignWithMechanism(key.get(), mechanism, paramsPtr, sig.get(), &hash);
if (srv != SECSuccess) {
return IPC_OK();
}
aSignature->data().AppendElements(sig->data, sig->len);
return IPC_OK();
}
} // namespace mozilla::psm
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