/// <inheritdoc/>
public async Task <X509CRLCollection> EnumerateCRLs(X509Certificate2 issuer, bool validateUpdateTime = true)
{
if (issuer == null)
{
throw new ArgumentNullException(nameof(issuer));
}
var crls = new X509CRLCollection();
foreach (X509CRL crl in await EnumerateCRLs().ConfigureAwait(false))
{
if (!X509Utils.CompareDistinguishedName(crl.IssuerName, issuer.SubjectName))
{
continue;
}
if (!crl.VerifySignature(issuer, false))
{
continue;
}
if (!validateUpdateTime ||
crl.ThisUpdate <= DateTime.UtcNow && (crl.NextUpdate == DateTime.MinValue || crl.NextUpdate >= DateTime.UtcNow))
{
crls.Add(crl);
}
}
return(crls);
}
/// <summary>
/// Revoke the certificates.
/// </summary>
/// <remarks>
/// Merge all existing revoked certificates from CRL list.
/// Add serialnumbers of new revoked certificates.
/// The CRL number is increased by one and the new CRL is returned.
/// </remarks>
public static X509CRL RevokeCertificate(
X509Certificate2 issuerCertificate,
X509CRLCollection issuerCrls,
X509Certificate2Collection revokedCertificates,
DateTime thisUpdate,
DateTime nextUpdate
)
{
if (!issuerCertificate.HasPrivateKey)
{
throw new ServiceResultException(StatusCodes.BadCertificateInvalid, "Issuer certificate has no private key, cannot revoke certificate.");
}
BigInteger crlSerialNumber = 0;
var crlRevokedList = new Dictionary <string, RevokedCertificate>();
// merge all existing revocation list
if (issuerCrls != null)
{
foreach (X509CRL issuerCrl in issuerCrls)
{
var extension = X509Extensions.FindExtension <X509CrlNumberExtension>(issuerCrl.CrlExtensions);
if (extension != null &&
extension.CrlNumber > crlSerialNumber)
{
crlSerialNumber = extension.CrlNumber;
}
foreach (var revokedCertificate in issuerCrl.RevokedCertificates)
{
if (!crlRevokedList.ContainsKey(revokedCertificate.SerialNumber))
{
crlRevokedList[revokedCertificate.SerialNumber] = revokedCertificate;
}
}
}
}
// add existing serial numbers
if (revokedCertificates != null)
{
foreach (var cert in revokedCertificates)
{
if (!crlRevokedList.ContainsKey(cert.SerialNumber))
{
var entry = new RevokedCertificate(cert.SerialNumber, CRLReason.PrivilegeWithdrawn);
crlRevokedList[cert.SerialNumber] = entry;
}
}
}
CrlBuilder crlBuilder = CrlBuilder.Create(issuerCertificate.SubjectName)
.AddRevokedCertificates(crlRevokedList.Values.ToList())
.SetThisUpdate(thisUpdate)
.SetNextUpdate(nextUpdate)
.AddCRLExtension(X509Extensions.BuildAuthorityKeyIdentifier(issuerCertificate))
.AddCRLExtension(X509Extensions.BuildCRLNumber(crlSerialNumber + 1));
return(new X509CRL(crlBuilder.CreateForRSA(issuerCertificate)));
}
/// <summary>
/// Revoke the certificate.
/// The CRL number is increased by one and the new CRL is returned.
/// </summary>
public static X509CRL RevokeCertificate(
X509Certificate2 issuerCertificate,
X509CRLCollection issuerCrls,
X509Certificate2Collection revokedCertificates
)
{
return(RevokeCertificate(issuerCertificate, issuerCrls, revokedCertificates,
DateTime.UtcNow, DateTime.UtcNow.AddMonths(12)));
}
/// <inheritdoc/>
public Task <X509CRLCollection> EnumerateCRLs()
{
var crls = new X509CRLCollection();
// check for CRL.
DirectoryInfo info = new DirectoryInfo(this.Directory.FullName + Path.DirectorySeparatorChar + "crl");
if (info.Exists)
{
foreach (FileInfo file in info.GetFiles("*.crl"))
{
X509CRL crl = new X509CRL(file.FullName);
crls.Add(crl);
}
}
return(Task.FromResult(crls));
}
private async Task <bool> UpdateStoreCrls(
CertificateTrustList trustList,
X509CRLCollection updatedCrls)
{
bool result = true;
ICertificateStore store = null;
try
{
store = trustList.OpenStore();
var storeCrls = await store.EnumerateCRLs().ConfigureAwait(false);
foreach (var crl in storeCrls)
{
if (!updatedCrls.Contains(crl))
{
if (!await store.DeleteCRL(crl).ConfigureAwait(false))
{
result = false;
}
}
else
{
updatedCrls.Remove(crl);
}
}
foreach (var crl in updatedCrls)
{
await store.AddCRL(crl).ConfigureAwait(false);
}
}
catch
{
result = false;
}
finally
{
store?.Close();
}
return(result);
}
private async Task <bool> UpdateStoreCrls(
string storePath,
X509CRLCollection updatedCrls)
{
bool result = true;
try
{
using (ICertificateStore store = CertificateStoreIdentifier.OpenStore(storePath))
{
var storeCrls = await store.EnumerateCRLs().ConfigureAwait(false);
foreach (var crl in storeCrls)
{
if (!updatedCrls.Contains(crl))
{
if (!await store.DeleteCRL(crl).ConfigureAwait(false))
{
result = false;
}
}
else
{
updatedCrls.Remove(crl);
}
}
foreach (var crl in updatedCrls)
{
await store.AddCRL(crl).ConfigureAwait(false);
}
}
}
catch
{
result = false;
}
return(result);
}
private ServiceResult RemoveCertificate(
ISystemContext context,
MethodState method,
NodeId objectId,
string thumbprint,
bool isTrustedCertificate)
{
HasSecureWriteAccess(context);
lock (m_lock)
{
if (m_sessionId != null)
{
return(StatusCodes.BadInvalidState);
}
if (String.IsNullOrEmpty(thumbprint))
{
return(StatusCodes.BadInvalidArgument);
}
using (ICertificateStore store = CertificateStoreIdentifier.OpenStore(isTrustedCertificate ? m_trustedStorePath : m_issuerStorePath))
{
var certCollection = store.FindByThumbprint(thumbprint).GetAwaiter().GetResult();
if (certCollection.Count == 0)
{
return(StatusCodes.BadInvalidArgument);
}
// delete all CRLs signed by cert
var crlsToDelete = new X509CRLCollection();
foreach (var crl in store.EnumerateCRLs().GetAwaiter().GetResult())
{
foreach (var cert in certCollection)
{
if (X509Utils.CompareDistinguishedName(cert.Subject, crl.Issuer) &&
crl.VerifySignature(cert, false))
{
crlsToDelete.Add(crl);
break;
}
}
}
if (!store.Delete(thumbprint).GetAwaiter().GetResult())
{
return(StatusCodes.BadInvalidArgument);
}
foreach (var crl in crlsToDelete)
{
if (!store.DeleteCRL(crl).GetAwaiter().GetResult())
{
// intentionally ignore errors, try best effort
Utils.LogError("RemoveCertificate: Failed to delete CRL {0}.", crl.ToString());
}
}
}
m_node.LastUpdateTime.Value = DateTime.UtcNow;
}
return(ServiceResult.Good);
}
private ServiceResult CloseAndUpdate(
ISystemContext context,
MethodState method,
NodeId objectId,
uint fileHandle,
ref bool restartRequired)
{
HasSecureWriteAccess(context);
ServiceResult result = StatusCodes.Good;
lock (m_lock)
{
if (m_sessionId != context.SessionId)
{
return(StatusCodes.BadUserAccessDenied);
}
if (m_fileHandle != fileHandle)
{
return(StatusCodes.BadInvalidArgument);
}
try
{
TrustListDataType trustList = DecodeTrustListData(context, m_strm);
TrustListMasks masks = (TrustListMasks)trustList.SpecifiedLists;
X509Certificate2Collection issuerCertificates = null;
X509CRLCollection issuerCrls = null;
X509Certificate2Collection trustedCertificates = null;
X509CRLCollection trustedCrls = null;
// test integrity of all CRLs
if ((masks & TrustListMasks.IssuerCertificates) != 0)
{
issuerCertificates = new X509Certificate2Collection();
foreach (var cert in trustList.IssuerCertificates)
{
issuerCertificates.Add(new X509Certificate2(cert));
}
}
if ((masks & TrustListMasks.IssuerCrls) != 0)
{
issuerCrls = new X509CRLCollection();
foreach (var crl in trustList.IssuerCrls)
{
issuerCrls.Add(new X509CRL(crl));
}
}
if ((masks & TrustListMasks.TrustedCertificates) != 0)
{
trustedCertificates = new X509Certificate2Collection();
foreach (var cert in trustList.TrustedCertificates)
{
trustedCertificates.Add(new X509Certificate2(cert));
}
}
if ((masks & TrustListMasks.TrustedCrls) != 0)
{
trustedCrls = new X509CRLCollection();
foreach (var crl in trustList.TrustedCrls)
{
trustedCrls.Add(new X509CRL(crl));
}
}
// update store
// test integrity of all CRLs
TrustListMasks updateMasks = TrustListMasks.None;
if ((masks & TrustListMasks.IssuerCertificates) != 0)
{
if (UpdateStoreCertificates(m_issuerStorePath, issuerCertificates).GetAwaiter().GetResult())
{
updateMasks |= TrustListMasks.IssuerCertificates;
}
}
if ((masks & TrustListMasks.IssuerCrls) != 0)
{
if (UpdateStoreCrls(m_issuerStorePath, issuerCrls).GetAwaiter().GetResult())
{
updateMasks |= TrustListMasks.IssuerCrls;
}
}
if ((masks & TrustListMasks.TrustedCertificates) != 0)
{
if (UpdateStoreCertificates(m_trustedStorePath, trustedCertificates).GetAwaiter().GetResult())
{
updateMasks |= TrustListMasks.TrustedCertificates;
}
}
if ((masks & TrustListMasks.TrustedCrls) != 0)
{
if (UpdateStoreCrls(m_trustedStorePath, trustedCrls).GetAwaiter().GetResult())
{
updateMasks |= TrustListMasks.TrustedCrls;
}
}
if (masks != updateMasks)
{
result = StatusCodes.BadCertificateInvalid;
}
}
catch
{
result = StatusCodes.BadCertificateInvalid;
}
finally
{
m_sessionId = null;
m_strm = null;
m_node.LastUpdateTime.Value = DateTime.UtcNow;
m_node.OpenCount.Value = 0;
}
}
restartRequired = false;
return(result);
}
public void VerifyCrlCerts(
KeyHashPair keyHashPair
)
{
int pathLengthConstraint = (keyHashPair.KeySize / 512) - 3;
X509Certificate2 issuerCertificate = GetIssuer(keyHashPair);
Assert.True(X509Utils.VerifySelfSigned(issuerCertificate));
var otherIssuerCertificate = CertificateFactory.CreateCertificate(issuerCertificate.Subject)
.SetLifeTime(TimeSpan.FromDays(180))
.SetHashAlgorithm(keyHashPair.HashAlgorithmName)
.SetCAConstraint(pathLengthConstraint)
.CreateForRSA();
Assert.True(X509Utils.VerifySelfSigned(otherIssuerCertificate));
X509Certificate2Collection revokedCerts = new X509Certificate2Collection();
for (int i = 0; i < 10; i++)
{
var cert = CertificateFactory.CreateCertificate($"CN=Test Cert {i}")
.SetIssuer(issuerCertificate)
.SetRSAKeySize((ushort)(keyHashPair.KeySize <= 2048 ? keyHashPair.KeySize : 2048))
.CreateForRSA();
revokedCerts.Add(cert);
Assert.False(X509Utils.VerifySelfSigned(cert));
}
Assert.NotNull(issuerCertificate);
Assert.NotNull(issuerCertificate.RawData);
Assert.True(issuerCertificate.HasPrivateKey);
using (var rsa = issuerCertificate.GetRSAPrivateKey())
{
Assert.NotNull(rsa);
}
using (var plainCert = new X509Certificate2(issuerCertificate.RawData))
{
Assert.NotNull(plainCert);
VerifyCACert(plainCert, issuerCertificate.Subject, pathLengthConstraint);
}
Assert.True(X509Utils.VerifySelfSigned(issuerCertificate));
X509Utils.VerifyRSAKeyPair(issuerCertificate, issuerCertificate, true);
var crl = CertificateFactory.RevokeCertificate(issuerCertificate, null, null);
Assert.NotNull(crl);
Assert.True(crl.VerifySignature(issuerCertificate, true));
var extension = crl.CrlExtensions.FindExtension <X509CrlNumberExtension>();
var crlCounter = new BigInteger(1);
Assert.AreEqual(crlCounter, extension.CrlNumber);
var revokedList = new X509CRLCollection {
crl
};
foreach (var cert in revokedCerts)
{
Assert.Throws <CryptographicException>(() => crl.VerifySignature(otherIssuerCertificate, true));
Assert.False(crl.IsRevoked(cert));
var nextCrl = CertificateFactory.RevokeCertificate(issuerCertificate, revokedList, new X509Certificate2Collection(cert));
crlCounter++;
Assert.NotNull(nextCrl);
Assert.True(nextCrl.IsRevoked(cert));
extension = nextCrl.CrlExtensions.FindExtension <X509CrlNumberExtension>();
Assert.AreEqual(crlCounter, extension.CrlNumber);
Assert.True(crl.VerifySignature(issuerCertificate, true));
revokedList.Add(nextCrl);
crl = nextCrl;
}
foreach (var cert in revokedCerts)
{
Assert.True(crl.IsRevoked(cert));
}
}
public async void Initialize(string trustedStorePath, string issuerStorePath, string rejectedStorePath)
{
CertificatesTable.Rows.Clear();
m_trustedStorePath = trustedStorePath;
m_issuerStorePath = issuerStorePath;
m_rejectedStorePath = rejectedStorePath;
if (!String.IsNullOrEmpty(trustedStorePath))
{
using (ICertificateStore store = CreateStore(trustedStorePath))
{
X509CertificateCollection certificates = await store.Enumerate();
foreach (X509Certificate2 certificate in certificates)
{
var crls = new X509CRLCollection();
if (store.SupportsCRLs)
{
foreach (X509CRL crl in await store.EnumerateCRLs(certificate))
{
crls.Add(crl);
}
}
AddCertificate(certificate, Status.Trusted, crls);
}
}
}
string path1 = Utils.GetAbsoluteDirectoryPath(trustedStorePath, true, false, false);
string path2 = Utils.GetAbsoluteDirectoryPath(issuerStorePath, true, false, false);
if (String.Compare(path1, path2, StringComparison.OrdinalIgnoreCase) != 0)
{
if (!String.IsNullOrEmpty(issuerStorePath))
{
using (ICertificateStore store = CreateStore(issuerStorePath))
{
X509Certificate2Collection certificates = await store.Enumerate();
foreach (X509Certificate2 certificate in certificates)
{
var crls = new X509CRLCollection();
if (store.SupportsCRLs)
{
foreach (X509CRL crl in await store.EnumerateCRLs(certificate))
{
crls.Add(crl);
}
}
AddCertificate(certificate, Status.Issuer, crls);
}
}
}
}
if (!String.IsNullOrEmpty(rejectedStorePath))
{
using (ICertificateStore store = CreateStore(rejectedStorePath))
{
X509Certificate2Collection certificates = await store.Enumerate();
foreach (X509Certificate2 certificate in certificates)
{
AddCertificate(certificate, Status.Rejected, null);
}
}
}
m_dataset.AcceptChanges();
NoDataWarningLabel.Visible = CertificatesTable.Rows.Count == 0;
}
private async Task <bool> AddTrustListToStore(SecurityConfiguration config, TrustListDataType trustList)
{
TrustListMasks masks = (TrustListMasks)trustList.SpecifiedLists;
X509Certificate2Collection issuerCertificates = null;
X509CRLCollection issuerCrls = null;
X509Certificate2Collection trustedCertificates = null;
X509CRLCollection trustedCrls = null;
// test integrity of all CRLs
if ((masks & TrustListMasks.IssuerCertificates) != 0)
{
issuerCertificates = new X509Certificate2Collection();
foreach (var cert in trustList.IssuerCertificates)
{
issuerCertificates.Add(new X509Certificate2(cert));
}
}
if ((masks & TrustListMasks.IssuerCrls) != 0)
{
issuerCrls = new X509CRLCollection();
foreach (var crl in trustList.IssuerCrls)
{
issuerCrls.Add(new X509CRL(crl));
}
}
if ((masks & TrustListMasks.TrustedCertificates) != 0)
{
trustedCertificates = new X509Certificate2Collection();
foreach (var cert in trustList.TrustedCertificates)
{
trustedCertificates.Add(new X509Certificate2(cert));
}
}
if ((masks & TrustListMasks.TrustedCrls) != 0)
{
trustedCrls = new X509CRLCollection();
foreach (var crl in trustList.TrustedCrls)
{
trustedCrls.Add(new X509CRL(crl));
}
}
// update store
// test integrity of all CRLs
TrustListMasks updateMasks = TrustListMasks.None;
if ((masks & TrustListMasks.IssuerCertificates) != 0)
{
if (await UpdateStoreCertificates(config.TrustedIssuerCertificates, issuerCertificates).ConfigureAwait(false))
{
updateMasks |= TrustListMasks.IssuerCertificates;
}
}
if ((masks & TrustListMasks.IssuerCrls) != 0)
{
if (await UpdateStoreCrls(config.TrustedIssuerCertificates, issuerCrls).ConfigureAwait(false))
{
updateMasks |= TrustListMasks.IssuerCrls;
}
}
if ((masks & TrustListMasks.TrustedCertificates) != 0)
{
if (await UpdateStoreCertificates(config.TrustedPeerCertificates, trustedCertificates).ConfigureAwait(false))
{
updateMasks |= TrustListMasks.TrustedCertificates;
}
}
if ((masks & TrustListMasks.TrustedCrls) != 0)
{
if (await UpdateStoreCrls(config.TrustedPeerCertificates, trustedCrls).ConfigureAwait(false))
{
updateMasks |= TrustListMasks.TrustedCrls;
}
}
return(masks == updateMasks);
}
