Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 709 insertions, 0 deletions

diff --git a/security/manager/ssl/nsNSSCertificate.cpp b/security/manager/ssl/nsNSSCertificate.cpp
new file mode 100644
index 0000000000..bd5f2ae759
--- /dev/null
+++ b/security/manager/ssl/nsNSSCertificate.cpp
@@ -0,0 +1,709 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsNSSCertificate.h"
+
+#include "CertVerifier.h"
+#include "ExtendedValidation.h"
+#include "NSSCertDBTrustDomain.h"
+#include "X509CertValidity.h"
+#include "certdb.h"
+#include "ipc/IPCMessageUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Base64.h"
+#include "mozilla/Casting.h"
+#include "mozilla/NotNull.h"
+#include "mozilla/Span.h"
+#include "mozilla/TextUtils.h"
+#include "mozilla/Unused.h"
+#include "mozilla/ipc/TransportSecurityInfoUtils.h"
+#include "mozilla/ipc/IPDLParamTraits.h"
+#include "mozilla/net/DNS.h"
+#include "mozpkix/Result.h"
+#include "mozpkix/pkixnss.h"
+#include "mozpkix/pkixtypes.h"
+#include "mozpkix/pkixutil.h"
+#include "nsArray.h"
+#include "nsCOMPtr.h"
+#include "nsIClassInfoImpl.h"
+#include "nsIObjectInputStream.h"
+#include "nsIObjectOutputStream.h"
+#include "nsIX509Cert.h"
+#include "nsNSSCertHelper.h"
+#include "nsNSSCertTrust.h"
+#include "nsPK11TokenDB.h"
+#include "nsPKCS12Blob.h"
+#include "nsProxyRelease.h"
+#include "nsReadableUtils.h"
+#include "nsString.h"
+#include "nsThreadUtils.h"
+#include "nsUnicharUtils.h"
+#include "nspr.h"
+#include "prerror.h"
+#include "secasn1.h"
+#include "secder.h"
+#include "secerr.h"
+#include "ssl.h"
+
+#ifdef XP_WIN
+#  include <winsock.h>  // for htonl
+#endif
+
+using namespace mozilla;
+using namespace mozilla::psm;
+
+extern LazyLogModule gPIPNSSLog;
+
+NS_IMPL_ISUPPORTS(nsNSSCertificate, nsIX509Cert, nsISerializable, nsIClassInfo)
+
+nsNSSCertificate::nsNSSCertificate() : mCert("nsNSSCertificate::mCert") {}
+
+nsNSSCertificate::nsNSSCertificate(CERTCertificate* cert)
+    : mCert("nsNSSCertificate::mCert") {
+  if (cert) {
+    mDER.AppendElements(cert->derCert.data, cert->derCert.len);
+    auto lock = mCert.Lock();
+    auto& maybeCert = lock.ref();
+    maybeCert.emplace(UniqueCERTCertificate(CERT_DupCertificate(cert)));
+  }
+}
+
+nsNSSCertificate::nsNSSCertificate(nsTArray<uint8_t>&& der)
+    : mDER(std::move(der)), mCert("nsNSSCertificate::mCert") {}
+
+UniqueCERTCertificate nsNSSCertificate::GetOrInstantiateCert() {
+  auto lock = mCert.Lock();
+  auto& maybeCert = lock.ref();
+  if (maybeCert.isSome()) {
+    return UniqueCERTCertificate(CERT_DupCertificate((*maybeCert).get()));
+  }
+
+  if (!EnsureNSSInitializedChromeOrContent()) {
+    return nullptr;
+  }
+
+  SECItem derItem = {siBuffer, mDER.Elements(),
+                     static_cast<unsigned int>(mDER.Length())};
+  UniqueCERTCertificate cert(CERT_NewTempCertificate(
+      CERT_GetDefaultCertDB(), &derItem, nullptr, false, true));
+  if (!cert) {
+    return nullptr;
+  }
+  maybeCert.emplace(std::move(cert));
+
+  return UniqueCERTCertificate(CERT_DupCertificate((*maybeCert).get()));
+}
+
+nsresult nsNSSCertificate::GetCertType(uint32_t* aCertType) {
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  CERTCertTrust certTrust{0, 0, 0};
+  // If there is no stored trust information, CERT_GetCertTrust will return
+  // SECFailure. This isn't a failure. In this case, all trust bits will remain
+  // unset.
+  Unused << CERT_GetCertTrust(cert.get(), &certTrust);
+  nsNSSCertTrust trust(&certTrust);
+  if (cert->nickname && trust.HasAnyUser()) {
+    *aCertType = nsIX509Cert::USER_CERT;
+    return NS_OK;
+  }
+  if (trust.HasAnyCA()) {
+    *aCertType = nsIX509Cert::CA_CERT;
+    return NS_OK;
+  }
+  if (trust.HasPeer(true, false)) {
+    *aCertType = nsIX509Cert::SERVER_CERT;
+    return NS_OK;
+  }
+  if (trust.HasPeer(false, true) && cert->emailAddr) {
+    *aCertType = nsIX509Cert::EMAIL_CERT;
+    return NS_OK;
+  }
+  if (CERT_IsCACert(cert.get(), nullptr)) {
+    *aCertType = nsIX509Cert::CA_CERT;
+    return NS_OK;
+  }
+  if (cert->emailAddr) {
+    *aCertType = nsIX509Cert::EMAIL_CERT;
+    return NS_OK;
+  }
+  *aCertType = nsIX509Cert::UNKNOWN_CERT;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetIsBuiltInRoot(bool* aIsBuiltInRoot) {
+  NS_ENSURE_ARG(aIsBuiltInRoot);
+
+  pkix::Input certInput;
+  pkix::Result rv = certInput.Init(mDER.Elements(), mDER.Length());
+  if (rv != pkix::Result::Success) {
+    return NS_ERROR_FAILURE;
+  }
+  rv = IsCertBuiltInRoot(certInput, *aIsBuiltInRoot);
+  if (rv != pkix::Result::Success) {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetDbKey(nsACString& aDbKey) {
+  static_assert(sizeof(uint64_t) == 8, "type size consistency check");
+  static_assert(sizeof(uint32_t) == 4, "type size consistency check");
+
+  pkix::Input certInput;
+  pkix::Result result = certInput.Init(mDER.Elements(), mDER.Length());
+  if (result != pkix::Result::Success) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  // NB: since we're not building a trust path, the endEntityOrCA parameter is
+  // irrelevant.
+  pkix::BackCert cert(certInput, pkix::EndEntityOrCA::MustBeEndEntity, nullptr);
+  result = cert.Init();
+  if (result != pkix::Result::Success) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  // The format of the key is the base64 encoding of the following:
+  // 4 bytes: {0, 0, 0, 0} (this was intended to be the module ID, but it was
+  //                        never implemented)
+  // 4 bytes: {0, 0, 0, 0} (this was intended to be the slot ID, but it was
+  //                        never implemented)
+  // 4 bytes: <serial number length in big-endian order>
+  // 4 bytes: <DER-encoded issuer distinguished name length in big-endian order>
+  // n bytes: <bytes of serial number>
+  // m bytes: <DER-encoded issuer distinguished name>
+  nsAutoCString buf;
+  const char leadingZeroes[] = {0, 0, 0, 0, 0, 0, 0, 0};
+  buf.Append(leadingZeroes, sizeof(leadingZeroes));
+  uint32_t serialNumberLen = htonl(cert.GetSerialNumber().GetLength());
+  buf.Append(BitwiseCast<const char*, const uint32_t*>(&serialNumberLen),
+             sizeof(uint32_t));
+  uint32_t issuerLen = htonl(cert.GetIssuer().GetLength());
+  buf.Append(BitwiseCast<const char*, const uint32_t*>(&issuerLen),
+             sizeof(uint32_t));
+  buf.Append(BitwiseCast<const char*, const unsigned char*>(
+                 cert.GetSerialNumber().UnsafeGetData()),
+             cert.GetSerialNumber().GetLength());
+  buf.Append(BitwiseCast<const char*, const unsigned char*>(
+                 cert.GetIssuer().UnsafeGetData()),
+             cert.GetIssuer().GetLength());
+
+  return Base64Encode(buf, aDbKey);
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetDisplayName(nsAString& aDisplayName) {
+  aDisplayName.Truncate();
+
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+
+  UniquePORTString commonName(CERT_GetCommonName(&cert->subject));
+  UniquePORTString organizationalUnitName(CERT_GetOrgUnitName(&cert->subject));
+  UniquePORTString organizationName(CERT_GetOrgName(&cert->subject));
+
+  bool isBuiltInRoot;
+  nsresult rv = GetIsBuiltInRoot(&isBuiltInRoot);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  // Only use the nickname for built-in roots where we already have a hard-coded
+  // reasonable display name (unfortunately we have to strip off the leading
+  // slot identifier followed by a ':'). Otherwise, attempt to use the following
+  // in order:
+  //  - the common name, if present
+  //  - an organizational unit name, if present
+  //  - an organization name, if present
+  //  - the entire subject distinguished name, if non-empty
+  //  - an email address, if one can be found
+  // In the unlikely event that none of these fields are present and non-empty
+  // (the subject really shouldn't be empty), an empty string is returned.
+  nsAutoCString builtInRootNickname;
+  if (isBuiltInRoot) {
+    nsAutoCString fullNickname(cert->nickname);
+    int32_t index = fullNickname.Find(":");
+    if (index != kNotFound) {
+      // Substring will gracefully handle the case where index is the last
+      // character in the string (that is, if the nickname is just
+      // "Builtin Object Token:"). In that case, we'll get an empty string.
+      builtInRootNickname =
+          Substring(fullNickname, AssertedCast<uint32_t>(index + 1));
+    }
+  }
+  const char* nameOptions[] = {builtInRootNickname.get(),
+                               commonName.get(),
+                               organizationalUnitName.get(),
+                               organizationName.get(),
+                               cert->subjectName,
+                               cert->emailAddr};
+
+  for (auto nameOption : nameOptions) {
+    if (nameOption) {
+      size_t len = strlen(nameOption);
+      if (len > 0) {
+        LossyUTF8ToUTF16(nameOption, len, aDisplayName);
+        return NS_OK;
+      }
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetEmailAddress(nsAString& aEmailAddress) {
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  if (cert->emailAddr) {
+    CopyUTF8toUTF16(MakeStringSpan(cert->emailAddr), aEmailAddress);
+  } else {
+    GetPIPNSSBundleString("CertNoEmailAddress", aEmailAddress);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetEmailAddresses(nsTArray<nsString>& aAddresses) {
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  uint32_t length = 0;
+  for (const char* aAddr = CERT_GetFirstEmailAddress(cert.get()); aAddr;
+       aAddr = CERT_GetNextEmailAddress(cert.get(), aAddr)) {
+    ++(length);
+  }
+
+  aAddresses.SetCapacity(length);
+
+  for (const char* aAddr = CERT_GetFirstEmailAddress(cert.get()); aAddr;
+       aAddr = CERT_GetNextEmailAddress(cert.get(), aAddr)) {
+    CopyASCIItoUTF16(MakeStringSpan(aAddr), *aAddresses.AppendElement());
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::ContainsEmailAddress(const nsAString& aEmailAddress,
+                                       bool* result) {
+  NS_ENSURE_ARG(result);
+  *result = false;
+
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  for (const char* aAddr = CERT_GetFirstEmailAddress(cert.get()); aAddr;
+       aAddr = CERT_GetNextEmailAddress(cert.get(), aAddr)) {
+    nsAutoString certAddr;
+    LossyUTF8ToUTF16(aAddr, strlen(aAddr), certAddr);
+    ToLowerCase(certAddr);
+
+    nsAutoString testAddr(aEmailAddress);
+    ToLowerCase(testAddr);
+
+    if (certAddr == testAddr) {
+      *result = true;
+      break;
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetCommonName(nsAString& aCommonName) {
+  aCommonName.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString commonName(CERT_GetCommonName(&cert->subject));
+  if (commonName) {
+    LossyUTF8ToUTF16(commonName.get(), strlen(commonName.get()), aCommonName);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetOrganization(nsAString& aOrganization) {
+  aOrganization.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString organization(CERT_GetOrgName(&cert->subject));
+  if (organization) {
+    LossyUTF8ToUTF16(organization.get(), strlen(organization.get()),
+                     aOrganization);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetIssuerCommonName(nsAString& aCommonName) {
+  aCommonName.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString commonName(CERT_GetCommonName(&cert->issuer));
+  if (commonName) {
+    LossyUTF8ToUTF16(commonName.get(), strlen(commonName.get()), aCommonName);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetIssuerOrganization(nsAString& aOrganization) {
+  aOrganization.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString organization(CERT_GetOrgName(&cert->issuer));
+  if (organization) {
+    LossyUTF8ToUTF16(organization.get(), strlen(organization.get()),
+                     aOrganization);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetIssuerOrganizationUnit(nsAString& aOrganizationUnit) {
+  aOrganizationUnit.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString organizationUnit(CERT_GetOrgUnitName(&cert->issuer));
+  if (organizationUnit) {
+    LossyUTF8ToUTF16(organizationUnit.get(), strlen(organizationUnit.get()),
+                     aOrganizationUnit);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetOrganizationalUnit(nsAString& aOrganizationalUnit) {
+  aOrganizationalUnit.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString orgunit(CERT_GetOrgUnitName(&cert->subject));
+  if (orgunit) {
+    LossyUTF8ToUTF16(orgunit.get(), strlen(orgunit.get()), aOrganizationalUnit);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetSubjectName(nsAString& _subjectName) {
+  _subjectName.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  if (cert->subjectName) {
+    LossyUTF8ToUTF16(cert->subjectName, strlen(cert->subjectName),
+                     _subjectName);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetIssuerName(nsAString& _issuerName) {
+  _issuerName.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  if (cert->issuerName) {
+    LossyUTF8ToUTF16(cert->issuerName, strlen(cert->issuerName), _issuerName);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetSerialNumber(nsAString& _serialNumber) {
+  _serialNumber.Truncate();
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePORTString tmpstr(
+      CERT_Hexify(&cert->serialNumber, true /* use colon delimiters */));
+  if (tmpstr) {
+    _serialNumber = NS_ConvertASCIItoUTF16(tmpstr.get());
+    return NS_OK;
+  }
+  return NS_ERROR_FAILURE;
+}
+
+nsresult nsNSSCertificate::GetCertificateHash(nsAString& aFingerprint,
+                                              SECOidTag aHashAlg) {
+  aFingerprint.Truncate();
+
+  if (!EnsureNSSInitializedChromeOrContent()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsTArray<uint8_t> digestArray;
+  nsresult rv =
+      Digest::DigestBuf(aHashAlg, mDER.Elements(), mDER.Length(), digestArray);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  SECItem digestItem = {siBuffer, digestArray.Elements(),
+                        static_cast<unsigned int>(digestArray.Length())};
+
+  UniquePORTString fpStr(
+      CERT_Hexify(&digestItem, true /* use colon delimiters */));
+  if (!fpStr) {
+    return NS_ERROR_FAILURE;
+  }
+
+  aFingerprint.AssignASCII(fpStr.get());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetSha256Fingerprint(nsAString& aSha256Fingerprint) {
+  return GetCertificateHash(aSha256Fingerprint, SEC_OID_SHA256);
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetSha1Fingerprint(nsAString& _sha1Fingerprint) {
+  return GetCertificateHash(_sha1Fingerprint, SEC_OID_SHA1);
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetTokenName(nsAString& aTokenName) {
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  if (!cert) {
+    return NS_ERROR_FAILURE;
+  }
+  UniquePK11SlotInfo internalSlot(PK11_GetInternalSlot());
+  if (!internalSlot) {
+    return NS_ERROR_FAILURE;
+  }
+  nsCOMPtr<nsIPK11Token> token(
+      new nsPK11Token(cert->slot ? cert->slot : internalSlot.get()));
+  nsAutoCString tmp;
+  nsresult rv = token->GetTokenName(tmp);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  aTokenName.Assign(NS_ConvertUTF8toUTF16(tmp));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetSha256SubjectPublicKeyInfoDigest(
+    nsACString& aSha256SPKIDigest) {
+  aSha256SPKIDigest.Truncate();
+
+  if (!EnsureNSSInitializedChromeOrContent()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  pkix::Input certInput;
+  pkix::Result result = certInput.Init(mDER.Elements(), mDER.Length());
+  if (result != pkix::Result::Success) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  // NB: since we're not building a trust path, the endEntityOrCA parameter is
+  // irrelevant.
+  pkix::BackCert cert(certInput, pkix::EndEntityOrCA::MustBeEndEntity, nullptr);
+  result = cert.Init();
+  if (result != pkix::Result::Success) {
+    return NS_ERROR_INVALID_ARG;
+  }
+  pkix::Input derPublicKey = cert.GetSubjectPublicKeyInfo();
+  nsTArray<uint8_t> digestArray;
+  nsresult rv = Digest::DigestBuf(SEC_OID_SHA256, derPublicKey.UnsafeGetData(),
+                                  derPublicKey.GetLength(), digestArray);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  rv = Base64Encode(nsDependentCSubstring(
+                        reinterpret_cast<const char*>(digestArray.Elements()),
+                        digestArray.Length()),
+                    aSha256SPKIDigest);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetRawDER(nsTArray<uint8_t>& aArray) {
+  aArray.SetLength(mDER.Length());
+  memcpy(aArray.Elements(), mDER.Elements(), mDER.Length());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetBase64DERString(nsACString& base64DERString) {
+  nsDependentCSubstring derString(
+      reinterpret_cast<const char*>(mDER.Elements()), mDER.Length());
+  nsresult rv = Base64Encode(derString, base64DERString);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  return NS_OK;
+}
+
+CERTCertificate* nsNSSCertificate::GetCert() {
+  UniqueCERTCertificate cert(GetOrInstantiateCert());
+  return cert.release();  // caller takes ownership
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetValidity(nsIX509CertValidity** aValidity) {
+  NS_ENSURE_ARG(aValidity);
+  pkix::Input certInput;
+  pkix::Result rv = certInput.Init(mDER.Elements(), mDER.Length());
+  if (rv != pkix::Success) {
+    return NS_ERROR_FAILURE;
+  }
+  nsCOMPtr<nsIX509CertValidity> validity = new X509CertValidity(certInput);
+  validity.forget(aValidity);
+  return NS_OK;
+}
+
+// NB: Any updates (except disk-only fields) must be kept in sync with
+//     |SerializeToIPC|.
+NS_IMETHODIMP
+nsNSSCertificate::Write(nsIObjectOutputStream* aStream) {
+  // This field used to be the cached EV status, but it is no longer necessary.
+  nsresult rv = aStream->Write32(0);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  rv = aStream->Write32(mDER.Length());
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  return aStream->WriteBytes(Span(mDER));
+}
+
+// NB: Any updates (except disk-only fields) must be kept in sync with
+//     |DeserializeFromIPC|.
+NS_IMETHODIMP
+nsNSSCertificate::Read(nsIObjectInputStream* aStream) {
+  auto lock = mCert.Lock();
+  auto& maybeCert = lock.ref();
+  if (!mDER.IsEmpty() || maybeCert.isSome()) {
+    return NS_ERROR_ALREADY_INITIALIZED;
+  }
+
+  // This field is no longer used.
+  uint32_t unusedCachedEVStatus;
+  nsresult rv = aStream->Read32(&unusedCachedEVStatus);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  uint32_t len;
+  rv = aStream->Read32(&len);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  rv = aStream->ReadByteArray(len, mDER);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+  return NS_OK;
+}
+
+void nsNSSCertificate::SerializeToIPC(IPC::MessageWriter* aWriter) {
+  bool hasCert = !mDER.IsEmpty();
+  WriteParam(aWriter, hasCert);
+
+  if (!hasCert) {
+    return;
+  }
+
+  WriteParam(aWriter, mDER);
+}
+
+bool nsNSSCertificate::DeserializeFromIPC(IPC::MessageReader* aReader) {
+  auto lock = mCert.Lock();
+  auto& maybeCert = lock.ref();
+  if (!mDER.IsEmpty() || maybeCert.isSome()) {
+    return false;
+  }
+
+  bool hasCert = false;
+  if (!ReadParam(aReader, &hasCert)) {
+    return false;
+  }
+
+  if (!hasCert) {
+    return true;
+  }
+
+  if (!ReadParam(aReader, &mDER)) {
+    return false;
+  }
+  return true;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetInterfaces(nsTArray<nsIID>& array) {
+  array.Clear();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetScriptableHelper(nsIXPCScriptable** _retval) {
+  *_retval = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetContractID(nsACString& aContractID) {
+  aContractID.SetIsVoid(true);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetClassDescription(nsACString& aClassDescription) {
+  aClassDescription.SetIsVoid(true);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetClassID(nsCID** aClassID) {
+  *aClassID = (nsCID*)moz_xmalloc(sizeof(nsCID));
+  return GetClassIDNoAlloc(*aClassID);
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetFlags(uint32_t* aFlags) {
+  *aFlags = nsIClassInfo::THREADSAFE;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsNSSCertificate::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) {
+  static NS_DEFINE_CID(kNSSCertificateCID, NS_X509CERT_CID);
+
+  *aClassIDNoAlloc = kNSSCertificateCID;
+  return NS_OK;
+}