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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 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 "CSTrustDomain.h"
#include "NSSCertDBTrustDomain.h"
#include "cert_storage/src/cert_storage.h"
#include "mozilla/Base64.h"
#include "mozilla/Logging.h"
#include "mozilla/Preferences.h"
#include "mozpkix/pkixnss.h"
#include "nsDirectoryServiceUtils.h"
#include "nsNSSComponent.h"
#include "nsServiceManagerUtils.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(nsTArray<nsTArray<uint8_t>>& certList)
: mCertList(certList), mCertBlocklist(do_GetService(NS_CERT_STORAGE_CID)) {}
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;
}
nsTArray<uint8_t> issuerBytes;
nsTArray<uint8_t> serialBytes;
nsTArray<uint8_t> subjectBytes;
nsTArray<uint8_t> pubKeyBytes;
Result result =
BuildRevocationCheckArrays(candidateCertDER, endEntityOrCA, issuerBytes,
serialBytes, subjectBytes, pubKeyBytes);
if (result != Success) {
return result;
}
int16_t revocationState;
nsresult nsrv = mCertBlocklist->GetRevocationState(
issuerBytes, serialBytes, subjectBytes, pubKeyBytes, &revocationState);
if (NS_FAILED(nsrv)) {
return Result::FATAL_ERROR_LIBRARY_FAILURE;
}
if (revocationState == nsICertStorage::STATE_ENFORCE) {
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;
}
nsTArray<uint8_t> candidateCert(candidateCertDER.UnsafeGetData(),
candidateCertDER.GetLength());
nsrv = component->IsCertContentSigningRoot(candidateCert, &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 (const auto& certBytes : mCertList) {
Input certInput;
Result rv = certInput.Init(certBytes.Elements(), certBytes.Length());
if (rv != Success) {
continue; // probably too big
}
bool keepGoing;
rv = checker.Check(certInput, 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) {
MOZ_ASSERT(requiredPolicy.IsAnyPolicy());
// 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);
}
} // namespace psm
} // namespace mozilla
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