security/manager/ssl/IPCClientCertsParent.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set sw=2 ts=8 et tw=80 : */
   3
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "IPCClientCertsParent.h"
   9 #include "ScopedNSSTypes.h"
  10 #include "nsNetCID.h"
  11 #include "nsNSSComponent.h"
  12 #include "nsNSSIOLayer.h"
  13
  14 #include "mozilla/SyncRunnable.h"
  15
  16 namespace mozilla::psm {
  17
  18 IPCClientCertsParent::IPCClientCertsParent() = default;
  19
  20 // When the IPC client certs module needs to find certificate and key objects
  21 // in the socket process, it will cause this function to be called in the
  22 // parent process. The parent process needs to find all certificates with
  23 // private keys (because these are potential client certificates).
  24 mozilla::ipc::IPCResult IPCClientCertsParent::RecvFindObjects(
  25     nsTArray<IPCClientCertObject>* aObjects) {
  26   nsCOMPtr<nsIEventTarget> socketThread(
  27       do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID));
  28   if (!socketThread) {
  29     return IPC_OK();
  30   }
  31   // Look for client certificates on the socket thread.
  32   UniqueCERTCertList certList;
  33   mozilla::SyncRunnable::DispatchToThread(
  34       socketThread, NS_NewRunnableFunction(
  35                         "IPCClientCertsParent::RecvFindObjects", [&certList]() {
  36                           certList =
  37                               psm::FindClientCertificatesWithPrivateKeys();
  38                         }));
  39   if (!certList) {
  40     return IPC_OK();
  41   }
  42   CERTCertListNode* n = CERT_LIST_HEAD(certList);
  43   while (!CERT_LIST_END(n, certList)) {
  44     nsTArray<uint8_t> certDER(n->cert->derCert.data, n->cert->derCert.len);
  45     uint32_t slotType;
  46     UniqueSECKEYPublicKey pubkey(CERT_ExtractPublicKey(n->cert));
  47     if (!pubkey) {
  48       return IPC_OK();
  49     }
  50     switch (SECKEY_GetPublicKeyType(pubkey.get())) {
  51       case rsaKey:
  52       case rsaPssKey: {
  53         slotType = PK11_DoesMechanism(n->cert->slot, CKM_RSA_PKCS_PSS)
  54                        ? kIPCClientCertsSlotTypeModern
  55                        : kIPCClientCertsSlotTypeLegacy;
  56         nsTArray<uint8_t> modulus(pubkey->u.rsa.modulus.data,
  57                                   pubkey->u.rsa.modulus.len);
  58         RSAKey rsakey(modulus, certDER, slotType);
  59         aObjects->AppendElement(std::move(rsakey));
  60         break;
  61       }
  62       case ecKey: {
  63         slotType = kIPCClientCertsSlotTypeModern;
  64         nsTArray<uint8_t> params(pubkey->u.ec.DEREncodedParams.data,
  65                                  pubkey->u.ec.DEREncodedParams.len);
  66         ECKey eckey(params, certDER, slotType);
  67         aObjects->AppendElement(std::move(eckey));
  68         break;
  69       }
  70       default:
  71         n = CERT_LIST_NEXT(n);
  72         continue;
  73     }
  74     Certificate cert(certDER, slotType);
  75     aObjects->AppendElement(std::move(cert));
  76
  77     n = CERT_LIST_NEXT(n);
  78   }
  79   return IPC_OK();
  80 }
  81
  82 // When the IPC client certs module needs to sign data using a key managed by
  83 // the parent process, it will cause this function to be called in the parent
  84 // process. The parent process needs to find the key corresponding to the
  85 // given certificate and sign the given data with the given parameters.
  86 mozilla::ipc::IPCResult IPCClientCertsParent::RecvSign(ByteArray aCert,
  87                                                        ByteArray aData,
  88                                                        ByteArray aParams,
  89                                                        ByteArray* aSignature) {
  90   SECItem certItem = {siBuffer, const_cast<uint8_t*>(aCert.data().Elements()),
  91                       static_cast<unsigned int>(aCert.data().Length())};
  92   aSignature->data().Clear();
  93
  94   UniqueCERTCertificate cert(CERT_NewTempCertificate(
  95       CERT_GetDefaultCertDB(), &certItem, nullptr, false, true));
  96   if (!cert) {
  97     return IPC_OK();
  98   }
  99   UniqueSECKEYPrivateKey key(PK11_FindKeyByAnyCert(cert.get(), nullptr));
 100   if (!key) {
 101     return IPC_OK();
 102   }
 103   SECItem params = {siBuffer, aParams.data().Elements(),
 104                     static_cast<unsigned int>(aParams.data().Length())};
 105   SECItem* paramsPtr = aParams.data().Length() > 0 ? &params : nullptr;
 106   CK_MECHANISM_TYPE mechanism;
 107   switch (key->keyType) {
 108     case ecKey:
 109       mechanism = CKM_ECDSA;
 110       break;
 111     case rsaKey:
 112       mechanism = aParams.data().Length() > 0 ? CKM_RSA_PKCS_PSS : CKM_RSA_PKCS;
 113       break;
 114     default:
 115       return IPC_OK();
 116   }
 117   uint32_t len = PK11_SignatureLen(key.get());
 118   UniqueSECItem sig(::SECITEM_AllocItem(nullptr, nullptr, len));
 119   SECItem hash = {siBuffer, aData.data().Elements(),
 120                   static_cast<unsigned int>(aData.data().Length())};
 121   SECStatus srv =
 122       PK11_SignWithMechanism(key.get(), mechanism, paramsPtr, sig.get(), &hash);
 123   if (srv != SECSuccess) {
 124     return IPC_OK();
 125   }
 126   aSignature->data().AppendElements(sig->data, sig->len);
 127   return IPC_OK();
 128 }
 129
 130 }  // namespace mozilla::psm