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/* -*- Mode: C++; tab-width: 8; 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 "CSTrustDomain.h"
#include "mozilla/Base64.h"
#include "mozilla/Preferences.h"
#include "nsNSSCertificate.h"
#include "nsNSSComponent.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "pkix/pkixnss.h"
using namespace mozilla::pkix;
namespace mozilla { namespace psm {
static LazyLogModule gTrustDomainPRLog("CSTrustDomain");
#define CSTrust_LOG(args) MOZ_LOG(gTrustDomainPRLog, LogLevel::Debug, args)
CSTrustDomain::CSTrustDomain(UniqueCERTCertList& certChain)
: mCertChain(certChain)
, mCertBlocklist(do_GetService(NS_CERTBLOCKLIST_CONTRACTID))
{
}
Result
CSTrustDomain::GetCertTrust(EndEntityOrCA endEntityOrCA,
const CertPolicyId& policy, Input candidateCertDER,
/*out*/ TrustLevel& trustLevel)
{
MOZ_ASSERT(policy.IsAnyPolicy());
if (!policy.IsAnyPolicy()) {
return Result::FATAL_ERROR_INVALID_ARGS;
}
SECItem candidateCertDERSECItem = UnsafeMapInputToSECItem(candidateCertDER);
UniqueCERTCertificate candidateCert(
CERT_NewTempCertificate(CERT_GetDefaultCertDB(), &candidateCertDERSECItem,
nullptr, false, true));
if (!candidateCert) {
return MapPRErrorCodeToResult(PR_GetError());
}
bool isCertRevoked;
nsresult nsrv = mCertBlocklist->IsCertRevoked(
candidateCert->derIssuer.data,
candidateCert->derIssuer.len,
candidateCert->serialNumber.data,
candidateCert->serialNumber.len,
candidateCert->derSubject.data,
candidateCert->derSubject.len,
candidateCert->derPublicKey.data,
candidateCert->derPublicKey.len,
&isCertRevoked);
if (NS_FAILED(nsrv)) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
if (isCertRevoked) {
CSTrust_LOG(("CSTrustDomain: certificate is revoked\n"));
return Result::ERROR_REVOKED_CERTIFICATE;
}
// Is this cert our built-in content signing root?
bool isRoot = false;
nsCOMPtr<nsINSSComponent> component(do_GetService(PSM_COMPONENT_CONTRACTID));
if (!component) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
nsrv = component->IsCertContentSigningRoot(candidateCert.get(), isRoot);
if (NS_FAILED(nsrv)) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
if (isRoot) {
CSTrust_LOG(("CSTrustDomain: certificate is a trust anchor\n"));
trustLevel = TrustLevel::TrustAnchor;
return Success;
}
CSTrust_LOG(("CSTrustDomain: certificate is *not* a trust anchor\n"));
trustLevel = TrustLevel::InheritsTrust;
return Success;
}
Result
CSTrustDomain::FindIssuer(Input encodedIssuerName, IssuerChecker& checker,
Time time)
{
// Loop over the chain, look for a matching subject
for (CERTCertListNode* n = CERT_LIST_HEAD(mCertChain);
!CERT_LIST_END(n, mCertChain); n = CERT_LIST_NEXT(n)) {
Input certDER;
Result rv = certDER.Init(n->cert->derCert.data, n->cert->derCert.len);
if (rv != Success) {
continue; // probably too big
}
// if the subject does not match, try the next certificate
Input subjectDER;
rv = subjectDER.Init(n->cert->derSubject.data, n->cert->derSubject.len);
if (rv != Success) {
continue; // just try the next one
}
if (!InputsAreEqual(subjectDER, encodedIssuerName)) {
CSTrust_LOG(("CSTrustDomain: subjects don't match\n"));
continue;
}
// If the subject does match, try the next step
bool keepGoing;
rv = checker.Check(certDER, nullptr/*additionalNameConstraints*/,
keepGoing);
if (rv != Success) {
return rv;
}
if (!keepGoing) {
CSTrust_LOG(("CSTrustDomain: don't keep going\n"));
break;
}
}
return Success;
}
Result
CSTrustDomain::CheckRevocation(EndEntityOrCA endEntityOrCA,
const CertID& certID, Time time,
Duration validityDuration,
/*optional*/ const Input* stapledOCSPresponse,
/*optional*/ const Input* aiaExtension,
/*optional*/ const Input* sctExtension)
{
// We're relying solely on the CertBlocklist for revocation - and we're
// performing checks on this in GetCertTrust (as per nsNSSCertDBTrustDomain)
return Success;
}
Result
CSTrustDomain::IsChainValid(const DERArray& certChain, Time time,
const CertPolicyId& requiredPolicy)
{
// Check that our chain is not empty
if (certChain.GetLength() == 0) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
return Success;
}
Result
CSTrustDomain::CheckSignatureDigestAlgorithm(DigestAlgorithm digestAlg,
EndEntityOrCA endEntityOrCA,
Time notBefore)
{
if (digestAlg == DigestAlgorithm::sha1) {
return Result::ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED;
}
return Success;
}
Result
CSTrustDomain::CheckRSAPublicKeyModulusSizeInBits(
EndEntityOrCA endEntityOrCA, unsigned int modulusSizeInBits)
{
if (modulusSizeInBits < 2048) {
return Result::ERROR_INADEQUATE_KEY_SIZE;
}
return Success;
}
Result
CSTrustDomain::VerifyRSAPKCS1SignedDigest(const SignedDigest& signedDigest,
Input subjectPublicKeyInfo)
{
return VerifyRSAPKCS1SignedDigestNSS(signedDigest, subjectPublicKeyInfo,
nullptr);
}
Result
CSTrustDomain::CheckECDSACurveIsAcceptable(EndEntityOrCA endEntityOrCA,
NamedCurve curve)
{
switch (curve) {
case NamedCurve::secp256r1: // fall through
case NamedCurve::secp384r1: // fall through
case NamedCurve::secp521r1:
return Success;
}
return Result::ERROR_UNSUPPORTED_ELLIPTIC_CURVE;
}
Result
CSTrustDomain::VerifyECDSASignedDigest(const SignedDigest& signedDigest,
Input subjectPublicKeyInfo)
{
return VerifyECDSASignedDigestNSS(signedDigest, subjectPublicKeyInfo,
nullptr);
}
Result
CSTrustDomain::CheckValidityIsAcceptable(Time notBefore, Time notAfter,
EndEntityOrCA endEntityOrCA,
KeyPurposeId keyPurpose)
{
return Success;
}
Result
CSTrustDomain::NetscapeStepUpMatchesServerAuth(Time notBefore,
/*out*/ bool& matches)
{
matches = false;
return Success;
}
void
CSTrustDomain::NoteAuxiliaryExtension(AuxiliaryExtension /*extension*/,
Input /*extensionData*/)
{
}
Result
CSTrustDomain::DigestBuf(Input item, DigestAlgorithm digestAlg,
/*out*/ uint8_t* digestBuf, size_t digestBufLen)
{
return DigestBufNSS(item, digestAlg, digestBuf, digestBufLen);
}
} } // end namespace mozilla::psm
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