/// <summary>
/// Import the specified certificate revocation list.
/// </summary>
/// <param name="crl">The certificate revocation list.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="crl"/> is <c>null</c>.
/// </exception>
public override void Import(X509Crl crl)
{
if (crl == null)
throw new ArgumentNullException ("crl");
crls.Add (crl);
}
/**
* Add the CRLEntry objects contained in a previous CRL.
*
* @param other the X509Crl to source the other entries from.
*/
public void AddCrl(
X509Crl other)
{
if (other == null)
throw new ArgumentNullException("other");
ISet revocations = other.GetRevokedCertificates();
if (revocations != null)
{
foreach (X509CrlEntry entry in revocations)
{
try
{
tbsGen.AddCrlEntry(
Asn1Sequence.GetInstance(
Asn1Object.FromByteArray(entry.GetEncoded())));
}
catch (IOException e)
{
throw new CrlException("exception processing encoding of CRL", e);
}
}
}
}
/// <summary>
/// Validates the cert with the provided crl responses.
/// </summary>
/// <param name="certificate">The cert to validate</param>
/// <param name="issuer">The issuer of the cert to validate</param>
/// <param name="validationTime">The time on which the cert was needed to validated</param>
/// <param name="certLists">The list of crls to use</param>
/// <returns>The crl response that was used, <c>null</c> if none used</returns>
/// <exception cref="RevocationException{T}">When the certificate was revoked on the provided time</exception>
/// <exception cref="RevocationUnknownException">When the certificate (or the crl) can't be validated</exception>
public static BCAX.CertificateList Verify(this X509Certificate2 certificate, X509Certificate2 issuer, DateTime validationTime, IList <BCAX.CertificateList> certLists)
{
DateTime minTime = validationTime - ClockSkewness;
DateTime maxTime = validationTime + ClockSkewness;
BCX.X509Certificate certificateBC = DotNetUtilities.FromX509Certificate(certificate);
BCX.X509Certificate issuerBC = DotNetUtilities.FromX509Certificate(issuer);
ValueWithRef <BCX.X509Crl, BCAX.CertificateList> crlWithOrg = certLists
.Select((c) => new ValueWithRef <BCX.X509Crl, BCAX.CertificateList>(new BCX.X509Crl(c), c)) //convert, keep orginal
.Where((c) => c.Value.IssuerDN.Equals(certificateBC.IssuerDN))
.Where((c) => c.Value.ThisUpdate >= minTime || (c.Value.NextUpdate != null && c.Value.NextUpdate.Value >= minTime))
.OrderByDescending((c) => c.Value.ThisUpdate)
.FirstOrDefault();
if (crlWithOrg == null)
{
return(null);
}
BCX.X509Crl crl = crlWithOrg.Value;
BCAX.CertificateList certList = crlWithOrg.Reference;
//check the signature (no need the check the issuer here)
try
{
crl.Verify(issuerBC.GetPublicKey());
}
catch (Exception e)
{
throw new RevocationUnknownException("The CRL has an invalid signature", e);
}
//check the signer (only the part relevant for CRL)
if (!issuerBC.GetKeyUsage()[6])
{
throw new RevocationUnknownException("The CRL was signed with a certificate that isn't allowed to sign CRLs");
}
//check if the certificate is revoked
BCX.X509CrlEntry crlEntry = crl.GetRevokedCertificate(certificateBC.SerialNumber);
if (crlEntry != null)
{
trace.TraceEvent(TraceEventType.Verbose, 0, "CRL indicates that {0} is revoked on {1}", certificate.Subject, crlEntry.RevocationDate);
if (maxTime >= crlEntry.RevocationDate)
{
throw new RevocationException <BCAX.CertificateList>(certList, "The certificate was revoked on " + crlEntry.RevocationDate.ToString("o"));
}
}
return(certList);
}
/// <summary>
/// Initializes a new instance of the <see cref="MimeKit.Cryptography.X509CrlRecord"/> class.
/// </summary>
/// <param name="crl">Crl.</param>
public X509CrlRecord(X509Crl crl)
{
if (crl == null)
throw new ArgumentNullException ("crl");
if (crl.NextUpdate != null)
NextUpdate = crl.NextUpdate.Value;
IssuerName = crl.IssuerDN.ToString ();
ThisUpdate = crl.ThisUpdate;
IsDelta = crl.IsDelta ();
Crl = crl;
}
public Crl(byte[] crlBytes)
{
_crl = new X509CrlParser().ReadCrl(crlBytes);
try
{
_crl.GetSignature();
}
catch (Exception)
{
throw new InvalidOperationException("Error parsing CRL");
}
}
private long?GetCRLNumber(Org.BouncyCastle.X509.X509Crl crlEntry)
{
Asn1OctetString extValue = crlEntry.GetExtensionValue(X509Extensions.CrlNumber);
if (extValue != null)
{
Asn1Object asn1Value = X509ExtensionUtilities.FromExtensionValue(extValue);
return(DerInteger.GetInstance(asn1Value).PositiveValue.LongValue);
}
return(null);
}
/// <summary>Return the issuer of the given CRL as an X509Principal.</summary>
public static X509Name GetIssuerX509Principal(
X509Crl crl)
{
try
{
TbsCertificateList tbsCertList = TbsCertificateList.GetInstance(
Asn1Object.FromByteArray(crl.GetTbsCertList()));
return tbsCertList.Issuer;
}
catch (Exception e)
{
throw new CrlException("Could not extract issuer", e);
}
}
/// <param name="crl"></param>
/// <returns></returns>
public virtual bool Match(X509Crl crl)
{
try
{
byte[] computedValue = DigestUtilities.CalculateDigest
(algorithm, crl.GetEncoded());
return Arrays.Equals(digestValue, computedValue);
}
catch (NoSuchAlgorithmException ex)
{
throw new RuntimeException("Maybe BouncyCastle provider is not installed ?", ex);
}
catch (CrlException ex)
{
throw new RuntimeException(ex);
}
}
public override bool Equals(
object obj)
{
if (obj == this)
{
return(true);
}
X509Crl other = obj as X509Crl;
if (other == null)
{
return(false);
}
return(c.Equals(other.c));
// NB: May prefer this implementation of Equals if more than one certificate implementation in play
//return Arrays.AreEqual(this.GetEncoded(), other.GetEncoded());
}
public void AddCrl(X509Crl other)
{
//IL_0008: Unknown result type (might be due to invalid IL or missing references)
//IL_004b: Expected O, but got Unknown
if (other == null)
{
throw new ArgumentNullException("other");
}
ISet revokedCertificates = other.GetRevokedCertificates();
if (revokedCertificates == null)
{
return;
}
global::System.Collections.IEnumerator enumerator = ((global::System.Collections.IEnumerable)revokedCertificates).GetEnumerator();
try
{
while (enumerator.MoveNext())
{
X509CrlEntry x509CrlEntry = (X509CrlEntry)enumerator.get_Current();
try
{
tbsGen.AddCrlEntry(Asn1Sequence.GetInstance(Asn1Object.FromByteArray(x509CrlEntry.GetEncoded())));
}
catch (IOException val)
{
IOException e = val;
throw new CrlException("exception processing encoding of CRL", (global::System.Exception)(object) e);
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
}
public void AddCrl(X509Crl other)
{
if (other == null)
{
throw new ArgumentNullException("other");
}
ISet revokedCertificates = other.GetRevokedCertificates();
if (revokedCertificates != null)
{
foreach (X509CrlEntry x509CrlEntry in revokedCertificates)
{
try
{
this.tbsGen.AddCrlEntry(Asn1Sequence.GetInstance(Asn1Object.FromByteArray(x509CrlEntry.GetEncoded())));
}
catch (IOException e)
{
throw new CrlException("exception processing encoding of CRL", e);
}
}
}
}
public override bool Equals(object other)
{
if (this == other)
{
return(true);
}
X509Crl that = other as X509Crl;
if (null == that)
{
return(false);
}
if (this.hashValueSet && that.hashValueSet)
{
if (this.hashValue != that.hashValue)
{
return(false);
}
}
else if (null == this.cachedEncoding || null == that.cachedEncoding)
{
DerBitString signature = c.Signature;
if (null != signature && !signature.Equals(that.c.Signature))
{
return(false);
}
}
byte[] thisEncoding = this.GetCachedEncoding().Encoding;
byte[] thatEncoding = that.GetCachedEncoding().Encoding;
return(null != thisEncoding &&
null != thatEncoding &&
Arrays.AreEqual(thisEncoding, thatEncoding));
}
/**
* Fetches delta CRLs according to RFC 3280 section 5.2.4.
*
* @param currentDate The date for which the delta CRLs must be valid.
* @param paramsPKIX The extended PKIX parameters.
* @param completeCRL The complete CRL the delta CRL is for.
* @return A <code>Set</code> of <code>X509CRL</code>s with delta CRLs.
* @throws Exception if an exception occurs while picking the delta
* CRLs.
*/
internal static ISet GetDeltaCrls(
DateTime currentDate,
PkixParameters paramsPKIX,
X509Crl completeCRL)
{
X509CrlStoreSelector deltaSelect = new X509CrlStoreSelector();
// 5.2.4 (a)
try
{
IList deltaSelectIssuer = Platform.CreateArrayList();
deltaSelectIssuer.Add(completeCRL.IssuerDN);
deltaSelect.Issuers = deltaSelectIssuer;
}
catch (IOException e)
{
throw new Exception("Cannot extract issuer from CRL.", e);
}
BigInteger completeCRLNumber = null;
try
{
Asn1Object asn1Object = GetExtensionValue(completeCRL, X509Extensions.CrlNumber);
if (asn1Object != null)
{
completeCRLNumber = CrlNumber.GetInstance(asn1Object).PositiveValue;
}
}
catch (Exception e)
{
throw new Exception(
"CRL number extension could not be extracted from CRL.", e);
}
// 5.2.4 (b)
byte[] idp = null;
try
{
Asn1Object obj = GetExtensionValue(completeCRL, X509Extensions.IssuingDistributionPoint);
if (obj != null)
{
idp = obj.GetDerEncoded();
}
}
catch (Exception e)
{
throw new Exception(
"Issuing distribution point extension value could not be read.",
e);
}
// 5.2.4 (d)
deltaSelect.MinCrlNumber = (completeCRLNumber == null)
? null
: completeCRLNumber.Add(BigInteger.One);
deltaSelect.IssuingDistributionPoint = idp;
deltaSelect.IssuingDistributionPointEnabled = true;
// 5.2.4 (c)
deltaSelect.MaxBaseCrlNumber = completeCRLNumber;
// find delta CRLs
ISet temp = CrlUtilities.FindCrls(deltaSelect, paramsPKIX, currentDate);
ISet result = new HashSet();
foreach (X509Crl crl in temp)
{
if (isDeltaCrl(crl))
{
result.Add(crl);
}
}
return result;
}
internal static void GetCertStatus(
DateTime validDate,
X509Crl crl,
Object cert,
CertStatus certStatus)
{
X509Crl bcCRL = null;
try
{
bcCRL = new X509Crl(CertificateList.GetInstance((Asn1Sequence)Asn1Sequence.FromByteArray(crl.GetEncoded())));
}
catch (Exception exception)
{
throw new Exception("Bouncy Castle X509Crl could not be created.", exception);
}
X509CrlEntry crl_entry = (X509CrlEntry)bcCRL.GetRevokedCertificate(GetSerialNumber(cert));
if (crl_entry == null)
return;
X509Name issuer = GetIssuerPrincipal(cert);
if (issuer.Equivalent(crl_entry.GetCertificateIssuer(), true)
|| issuer.Equivalent(crl.IssuerDN, true))
{
DerEnumerated reasonCode = null;
if (crl_entry.HasExtensions)
{
try
{
reasonCode = DerEnumerated.GetInstance(
GetExtensionValue(crl_entry, X509Extensions.ReasonCode));
}
catch (Exception e)
{
throw new Exception(
"Reason code CRL entry extension could not be decoded.",
e);
}
}
// for reason keyCompromise, caCompromise, aACompromise or
// unspecified
if (!(validDate.Ticks < crl_entry.RevocationDate.Ticks)
|| reasonCode == null
|| reasonCode.Value.TestBit(0)
|| reasonCode.Value.TestBit(1)
|| reasonCode.Value.TestBit(2)
|| reasonCode.Value.TestBit(8))
{
if (reasonCode != null) // (i) or (j) (1)
{
certStatus.Status = reasonCode.Value.SignValue;
}
else // (i) or (j) (2)
{
certStatus.Status = CrlReason.Unspecified;
}
certStatus.RevocationDate = new DateTimeObject(crl_entry.RevocationDate);
}
}
}
/**
* Verifies a certificate chain against a KeyStore.
* @param certs the certificate chain
* @param keystore the <CODE>KeyStore</CODE>
* @param crls the certificate revocation list or <CODE>null</CODE>
* @param calendar the date or <CODE>null</CODE> for the current date
* @return <CODE>null</CODE> if the certificate chain could be validade or a
* <CODE>Object[]{cert,error}</CODE> where <CODE>cert</CODE> is the
* failed certificate and <CODE>error</CODE> is the error message
*/
public static Object[] VerifyCertificates(X509Certificate[] certs, List<X509Certificate> keystore, X509Crl[] crls, DateTime calendar) {
for (int k = 0; k < certs.Length; ++k) {
X509Certificate cert = certs[k];
String err = VerifyCertificate(cert, crls, calendar);
if (err != null)
return new Object[]{cert, err};
foreach (X509Certificate certStoreX509 in keystore) {
try {
if (VerifyCertificate(certStoreX509, crls, calendar) != null)
continue;
try {
cert.Verify(certStoreX509.GetPublicKey());
return null;
}
catch {
continue;
}
}
catch {
}
}
int j;
for (j = 0; j < certs.Length; ++j) {
if (j == k)
continue;
X509Certificate certNext = certs[j];
try {
cert.Verify(certNext.GetPublicKey());
break;
}
catch {
}
}
if (j == certs.Length)
return new Object[]{cert, "Cannot be verified against the KeyStore or the certificate chain"};
}
return new Object[]{null, "Invalid state. Possible circular certificate chain"};
}
internal static void ProcessCrlJ(
DateTime validDate,
X509Crl completecrl,
object cert,
CertStatus certStatus)
{
if (certStatus.Status == CertStatus.Unrevoked)
{
PkixCertPathValidatorUtilities.GetCertStatus(validDate, completecrl, cert, certStatus);
}
}
/**
* If use-deltas is set, verify the issuer and scope of the delta CRL.
*
* @param deltaCRL The delta CRL.
* @param completeCRL The complete CRL.
* @param pkixParams The PKIX paramaters.
* @throws AnnotatedException if an exception occurs.
*/
internal static void ProcessCrlC(
X509Crl deltaCRL,
X509Crl completeCRL,
PkixParameters pkixParams)
{
if (deltaCRL == null)
return;
IssuingDistributionPoint completeidp = null;
try
{
completeidp = IssuingDistributionPoint.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(completeCRL, X509Extensions.IssuingDistributionPoint));
}
catch (Exception e)
{
throw new Exception("000 Issuing distribution point extension could not be decoded.", e);
}
if (pkixParams.IsUseDeltasEnabled)
{
// (c) (1)
if (!deltaCRL.IssuerDN.Equivalent(completeCRL.IssuerDN, true))
throw new Exception("Complete CRL issuer does not match delta CRL issuer.");
// (c) (2)
IssuingDistributionPoint deltaidp = null;
try
{
deltaidp = IssuingDistributionPoint.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(deltaCRL, X509Extensions.IssuingDistributionPoint));
}
catch (Exception e)
{
throw new Exception(
"Issuing distribution point extension from delta CRL could not be decoded.", e);
}
if (!Platform.Equals(completeidp, deltaidp))
{
throw new Exception(
"Issuing distribution point extension from delta CRL and complete CRL does not match.");
}
// (c) (3)
Asn1Object completeKeyIdentifier = null;
try
{
completeKeyIdentifier = PkixCertPathValidatorUtilities.GetExtensionValue(
completeCRL, X509Extensions.AuthorityKeyIdentifier);
}
catch (Exception e)
{
throw new Exception(
"Authority key identifier extension could not be extracted from complete CRL.", e);
}
Asn1Object deltaKeyIdentifier = null;
try
{
deltaKeyIdentifier = PkixCertPathValidatorUtilities.GetExtensionValue(
deltaCRL, X509Extensions.AuthorityKeyIdentifier);
}
catch (Exception e)
{
throw new Exception(
"Authority key identifier extension could not be extracted from delta CRL.", e);
}
if (completeKeyIdentifier == null)
throw new Exception("CRL authority key identifier is null.");
if (deltaKeyIdentifier == null)
throw new Exception("Delta CRL authority key identifier is null.");
if (!completeKeyIdentifier.Equals(deltaKeyIdentifier))
{
throw new Exception(
"Delta CRL authority key identifier does not match complete CRL authority key identifier.");
}
}
}
internal static ISet[] ProcessCrlA1ii(
DateTime currentDate,
PkixParameters paramsPKIX,
X509Certificate cert,
X509Crl crl)
{
ISet deltaSet = new HashSet();
X509CrlStoreSelector crlselect = new X509CrlStoreSelector();
crlselect.CertificateChecking = cert;
try
{
IList issuer = Platform.CreateArrayList();
issuer.Add(crl.IssuerDN);
crlselect.Issuers = issuer;
}
catch (IOException e)
{
throw new Exception("Cannot extract issuer from CRL." + e, e);
}
crlselect.CompleteCrlEnabled = true;
ISet completeSet = CrlUtilities.FindCrls(crlselect, paramsPKIX, currentDate);
if (paramsPKIX.IsUseDeltasEnabled)
{
// get delta CRL(s)
try
{
deltaSet.AddAll(PkixCertPathValidatorUtilities.GetDeltaCrls(currentDate, paramsPKIX, crl));
}
catch (Exception e)
{
throw new Exception("Exception obtaining delta CRLs.", e);
}
}
return new ISet[]{ completeSet, deltaSet };
}
/**
* Verifies a certificate against a single CRL.
* @param crl the Certificate Revocation List
* @param signCert a certificate that needs to be verified
* @param issuerCert its issuer
* @param signDate the sign date
* @return true if the verification succeeded
* @throws GeneralSecurityException
*/
public bool Verify(X509Crl crl, X509Certificate signCert, X509Certificate issuerCert, DateTime signDate)
{
if (crl == null || signDate == DateTime.MaxValue)
return false;
// We only check CRLs valid on the signing date for which the issuer matches
if (crl.IssuerDN.Equals(signCert.IssuerDN)
&& signDate.CompareTo(crl.ThisUpdate) > 0 && signDate.CompareTo(crl.NextUpdate.Value) < 0) {
// the signing certificate may not be revoked
if (IsSignatureValid(crl, issuerCert) && crl.IsRevoked(signCert)) {
throw new VerificationException(signCert, String.Format("{0} The certificate has been revoked.", signCert));
}
return true;
}
return false;
}
/// <summary>
/// Gets the database command to select the record for the specified CRL.
/// </summary>
/// <remarks>
/// Gets the database command to select the record for the specified CRL.
/// </remarks>
/// <returns>The database command.</returns>
/// <param name="crl">The X.509 CRL.</param>
/// <param name="fields">The fields to return.</param>
protected override DbCommand GetSelectCommand (X509Crl crl, X509CrlRecordFields fields)
{
var query = "SELECT " + string.Join (", ", GetColumnNames (fields)) + " FROM CRLS ";
var issuerName = crl.IssuerDN.ToString ();
var command = connection.CreateCommand ();
command.CommandText = query + "WHERE DELTA = @DELTA AND ISSUERNAME = @ISSUERNAME AND THISUPDATE = @THISUPDATE LIMIT 1";
command.AddParameterWithValue ("@DELTA", crl.IsDelta ());
command.AddParameterWithValue ("@ISSUERNAME", issuerName);
command.AddParameterWithValue ("@THISUPDATE", crl.ThisUpdate);
command.CommandType = CommandType.Text;
return command;
}
/// <summary>
/// Revoke the CA signed certificate.
/// The issuer CA public key, the private key and the crl reside in the storepath.
/// The CRL number is increased by one and existing CRL for the issuer are deleted from the store.
/// </summary>
public static async Task RevokeCertificateAsync(
string storePath,
X509Certificate2 certificate,
string issuerKeyFilePassword = null
)
{
try
{
string subjectName = certificate.IssuerName.Name;
string keyId = null;
string serialNumber = null;
// caller may want to create empty CRL using the CA cert itself
bool isCACert = IsCertificateAuthority(certificate);
// find the authority key identifier.
X509AuthorityKeyIdentifierExtension authority = FindAuthorityKeyIdentifier(certificate);
if (authority != null)
{
keyId = authority.KeyId;
serialNumber = authority.SerialNumber;
}
else
{
throw new ArgumentException("Certificate does not contain an Authority Key");
}
if (!isCACert)
{
if (serialNumber == certificate.SerialNumber ||
Utils.CompareDistinguishedName(certificate.Subject, certificate.Issuer))
{
throw new ServiceResultException(StatusCodes.BadCertificateInvalid, "Cannot revoke self signed certificates");
}
}
X509Certificate2 certCA = null;
using (ICertificateStore store = CertificateStoreIdentifier.OpenStore(storePath))
{
if (store == null)
{
throw new ArgumentException("Invalid store path/type");
}
certCA = await FindIssuerCABySerialNumberAsync(store, certificate.Issuer, serialNumber);
if (certCA == null)
{
throw new ServiceResultException(StatusCodes.BadCertificateInvalid, "Cannot find issuer certificate in store.");
}
if (!certCA.HasPrivateKey)
{
throw new ServiceResultException(StatusCodes.BadCertificateInvalid, "Issuer certificate has no private key, cannot revoke certificate.");
}
CertificateIdentifier certCAIdentifier = new CertificateIdentifier(certCA);
certCAIdentifier.StorePath = storePath;
certCAIdentifier.StoreType = CertificateStoreIdentifier.DetermineStoreType(storePath);
X509Certificate2 certCAWithPrivateKey = await certCAIdentifier.LoadPrivateKey(issuerKeyFilePassword);
if (certCAWithPrivateKey == null)
{
throw new ServiceResultException(StatusCodes.BadCertificateInvalid, "Failed to load issuer private key. Is the password correct?");
}
List <X509CRL> certCACrl = store.EnumerateCRLs(certCA, false);
using (var cfrg = new CertificateFactoryRandomGenerator())
{
// cert generators
SecureRandom random = new SecureRandom(cfrg);
BigInteger crlSerialNumber = BigInteger.Zero;
Org.BouncyCastle.X509.X509Certificate bcCertCA = new X509CertificateParser().ReadCertificate(certCA.RawData);
AsymmetricKeyParameter signingKey = GetPrivateKeyParameter(certCAWithPrivateKey);
ISignatureFactory signatureFactory =
new Asn1SignatureFactory(GetRSAHashAlgorithm(defaultHashSize), signingKey, random);
X509V2CrlGenerator crlGen = new X509V2CrlGenerator();
crlGen.SetIssuerDN(bcCertCA.IssuerDN);
crlGen.SetThisUpdate(DateTime.UtcNow);
crlGen.SetNextUpdate(DateTime.UtcNow.AddMonths(12));
// merge all existing revocation list
X509CrlParser parser = new X509CrlParser();
foreach (X509CRL caCrl in certCACrl)
{
X509Crl crl = parser.ReadCrl(caCrl.RawData);
crlGen.AddCrl(crl);
var crlVersion = GetCrlNumber(crl);
if (crlVersion.IntValue > crlSerialNumber.IntValue)
{
crlSerialNumber = crlVersion;
}
}
if (isCACert)
{
// add a dummy revoked cert
crlGen.AddCrlEntry(BigInteger.One, DateTime.UtcNow, CrlReason.Superseded);
}
else
{
// add the revoked cert
crlGen.AddCrlEntry(GetSerialNumber(certificate), DateTime.UtcNow, CrlReason.PrivilegeWithdrawn);
}
crlGen.AddExtension(X509Extensions.AuthorityKeyIdentifier,
false,
new AuthorityKeyIdentifierStructure(bcCertCA));
// set new serial number
crlSerialNumber = crlSerialNumber.Add(BigInteger.One);
crlGen.AddExtension(X509Extensions.CrlNumber,
false,
new CrlNumber(crlSerialNumber));
// generate updated CRL
Org.BouncyCastle.X509.X509Crl updatedCrl = crlGen.Generate(signatureFactory);
// add updated CRL to store
X509CRL updatedCRL = new X509CRL(updatedCrl.GetEncoded());
store.AddCRL(updatedCRL);
// delete outdated CRLs from store
foreach (X509CRL caCrl in certCACrl)
{
store.DeleteCRL(caCrl);
}
}
store.Close();
}
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// Import the specified certificate revocation list.
/// </summary>
/// <param name="crl">The certificate revocation list.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="crl"/> is <c>null</c>.
/// </exception>
public override void Import(X509Crl crl)
{
if (crl == null)
throw new ArgumentNullException ("crl");
// FIXME: implement this
}
private static bool isDeltaCrl(
X509Crl crl)
{
ISet critical = crl.GetCriticalExtensionOids();
return critical.Contains(X509Extensions.DeltaCrlIndicator.Id);
}
/**
* Checks if a CRL verifies against the issuer certificate or a trusted anchor.
* @param crl the CRL
* @param crlIssuer the trusted anchor
* @return true if the CRL can be trusted
*/
public bool IsSignatureValid(X509Crl crl, X509Certificate crlIssuer)
{
// check if the CRL was issued by the issuer
if (crlIssuer != null) {
try {
crl.Verify(crlIssuer.GetPublicKey());
return true;
} catch (GeneralSecurityException) {
LOGGER.Warn("CRL not issued by the same authority as the certificate that is being checked");
}
}
// check the CRL against trusted anchors
if (certificates == null)
return false;
try {
// loop over the certificate in the key store
foreach (X509Certificate anchor in certificates) {
try {
crl.Verify(anchor.GetPublicKey());
return true;
} catch (GeneralSecurityException) {}
}
}
catch (GeneralSecurityException) {
return false;
}
return false;
}
/**
* Obtain and validate the certification path for the complete CRL issuer.
* If a key usage extension is present in the CRL issuer's certificate,
* verify that the cRLSign bit is set.
*
* @param crl CRL which contains revocation information for the certificate
* <code>cert</code>.
* @param cert The attribute certificate or certificate to check if it is
* revoked.
* @param defaultCRLSignCert The issuer certificate of the certificate <code>cert</code>.
* @param defaultCRLSignKey The public key of the issuer certificate
* <code>defaultCRLSignCert</code>.
* @param paramsPKIX paramsPKIX PKIX parameters.
* @param certPathCerts The certificates on the certification path.
* @return A <code>Set</code> with all keys of possible CRL issuer
* certificates.
* @throws AnnotatedException if the CRL is not valid or the status cannot be checked or
* some error occurs.
*/
internal static ISet ProcessCrlF(
X509Crl crl,
object cert,
X509Certificate defaultCRLSignCert,
AsymmetricKeyParameter defaultCRLSignKey,
PkixParameters paramsPKIX,
IList certPathCerts)
{
// (f)
// get issuer from CRL
X509CertStoreSelector selector = new X509CertStoreSelector();
try
{
selector.Subject = crl.IssuerDN;
}
catch (IOException e)
{
throw new Exception(
"Subject criteria for certificate selector to find issuer certificate for CRL could not be set.", e);
}
// get CRL signing certs
IList coll = Platform.CreateArrayList();
try
{
CollectionUtilities.AddRange(coll, PkixCertPathValidatorUtilities.FindCertificates(selector, paramsPKIX.GetStores()));
CollectionUtilities.AddRange(coll, PkixCertPathValidatorUtilities.FindCertificates(selector, paramsPKIX.GetAdditionalStores()));
}
catch (Exception e)
{
throw new Exception("Issuer certificate for CRL cannot be searched.", e);
}
coll.Add(defaultCRLSignCert);
IEnumerator cert_it = coll.GetEnumerator();
IList validCerts = Platform.CreateArrayList();
IList validKeys = Platform.CreateArrayList();
while (cert_it.MoveNext())
{
X509Certificate signingCert = (X509Certificate)cert_it.Current;
/*
* CA of the certificate, for which this CRL is checked, has also
* signed CRL, so skip the path validation, because is already done
*/
if (signingCert.Equals(defaultCRLSignCert))
{
validCerts.Add(signingCert);
validKeys.Add(defaultCRLSignKey);
continue;
}
try
{
// CertPathBuilder builder = CertPathBuilder.GetInstance("PKIX");
PkixCertPathBuilder builder = new PkixCertPathBuilder();
selector = new X509CertStoreSelector();
selector.Certificate = signingCert;
PkixParameters temp = (PkixParameters)paramsPKIX.Clone();
temp.SetTargetCertConstraints(selector);
PkixBuilderParameters parameters = (PkixBuilderParameters)
PkixBuilderParameters.GetInstance(temp);
/*
* if signingCert is placed not higher on the cert path a
* dependency loop results. CRL for cert is checked, but
* signingCert is needed for checking the CRL which is dependent
* on checking cert because it is higher in the cert path and so
* signing signingCert transitively. so, revocation is disabled,
* forgery attacks of the CRL are detected in this outer loop
* for all other it must be enabled to prevent forgery attacks
*/
if (certPathCerts.Contains(signingCert))
{
parameters.IsRevocationEnabled = false;
}
else
{
parameters.IsRevocationEnabled = true;
}
IList certs = builder.Build(parameters).CertPath.Certificates;
validCerts.Add(signingCert);
validKeys.Add(PkixCertPathValidatorUtilities.GetNextWorkingKey(certs, 0));
}
catch (PkixCertPathBuilderException e)
{
throw new Exception("Internal error.", e);
}
catch (PkixCertPathValidatorException e)
{
throw new Exception("Public key of issuer certificate of CRL could not be retrieved.", e);
}
//catch (Exception e)
//{
// throw new Exception(e.Message);
//}
}
ISet checkKeys = new HashSet();
Exception lastException = null;
for (int i = 0; i < validCerts.Count; i++)
{
X509Certificate signCert = (X509Certificate)validCerts[i];
bool[] keyusage = signCert.GetKeyUsage();
if (keyusage != null && (keyusage.Length < 7 || !keyusage[CRL_SIGN]))
{
lastException = new Exception(
"Issuer certificate key usage extension does not permit CRL signing.");
}
else
{
checkKeys.Add(validKeys[i]);
}
}
if ((checkKeys.Count == 0) && lastException == null)
{
throw new Exception("Cannot find a valid issuer certificate.");
}
if ((checkKeys.Count == 0) && lastException != null)
{
throw lastException;
}
return checkKeys;
}
/// <summary> /// Import the specified certificate revocation list. /// </summary> /// <param name="crl">The certificate revocation list.</param> /// <exception cref="System.ArgumentNullException"> /// <paramref name="crl"/> is <c>null</c>. /// </exception> public abstract void Import(X509Crl crl);
/**
* If the complete CRL includes an issuing distribution point (IDP) CRL
* extension check the following:
* <p>
* (i) If the distribution point name is present in the IDP CRL extension
* and the distribution field is present in the DP, then verify that one of
* the names in the IDP matches one of the names in the DP. If the
* distribution point name is present in the IDP CRL extension and the
* distribution field is omitted from the DP, then verify that one of the
* names in the IDP matches one of the names in the cRLIssuer field of the
* DP.
* </p>
* <p>
* (ii) If the onlyContainsUserCerts boolean is asserted in the IDP CRL
* extension, verify that the certificate does not include the basic
* constraints extension with the cA boolean asserted.
* </p>
* <p>
* (iii) If the onlyContainsCACerts boolean is asserted in the IDP CRL
* extension, verify that the certificate includes the basic constraints
* extension with the cA boolean asserted.
* </p>
* <p>
* (iv) Verify that the onlyContainsAttributeCerts boolean is not asserted.
* </p>
*
* @param dp The distribution point.
* @param cert The certificate.
* @param crl The CRL.
* @throws AnnotatedException if one of the conditions is not met or an error occurs.
*/
internal static void ProcessCrlB2(
DistributionPoint dp,
object cert,
X509Crl crl)
{
IssuingDistributionPoint idp = null;
try
{
idp = IssuingDistributionPoint.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(crl, X509Extensions.IssuingDistributionPoint));
}
catch (Exception e)
{
throw new Exception("0 Issuing distribution point extension could not be decoded.", e);
}
// (b) (2) (i)
// distribution point name is present
if (idp != null)
{
if (idp.DistributionPoint != null)
{
// make list of names
DistributionPointName dpName = IssuingDistributionPoint.GetInstance(idp).DistributionPoint;
IList names = Platform.CreateArrayList();
if (dpName.PointType == DistributionPointName.FullName)
{
GeneralName[] genNames = GeneralNames.GetInstance(dpName.Name).GetNames();
for (int j = 0; j < genNames.Length; j++)
{
names.Add(genNames[j]);
}
}
if (dpName.PointType == DistributionPointName.NameRelativeToCrlIssuer)
{
Asn1EncodableVector vec = new Asn1EncodableVector();
try
{
IEnumerator e = Asn1Sequence.GetInstance(
Asn1Sequence.FromByteArray(crl.IssuerDN.GetEncoded())).GetEnumerator();
while (e.MoveNext())
{
vec.Add((Asn1Encodable)e.Current);
}
}
catch (IOException e)
{
throw new Exception("Could not read CRL issuer.", e);
}
vec.Add(dpName.Name);
names.Add(new GeneralName(X509Name.GetInstance(new DerSequence(vec))));
}
bool matches = false;
// verify that one of the names in the IDP matches one
// of the names in the DP.
if (dp.DistributionPointName != null)
{
dpName = dp.DistributionPointName;
GeneralName[] genNames = null;
if (dpName.PointType == DistributionPointName.FullName)
{
genNames = GeneralNames.GetInstance(dpName.Name).GetNames();
}
if (dpName.PointType == DistributionPointName.NameRelativeToCrlIssuer)
{
if (dp.CrlIssuer != null)
{
genNames = dp.CrlIssuer.GetNames();
}
else
{
genNames = new GeneralName[1];
try
{
genNames[0] = new GeneralName(
PkixCertPathValidatorUtilities.GetIssuerPrincipal(cert));
}
catch (IOException e)
{
throw new Exception("Could not read certificate issuer.", e);
}
}
for (int j = 0; j < genNames.Length; j++)
{
IEnumerator e = Asn1Sequence.GetInstance(genNames[j].Name.ToAsn1Object()).GetEnumerator();
Asn1EncodableVector vec = new Asn1EncodableVector();
while (e.MoveNext())
{
vec.Add((Asn1Encodable)e.Current);
}
vec.Add(dpName.Name);
genNames[j] = new GeneralName(X509Name.GetInstance(new DerSequence(vec)));
}
}
if (genNames != null)
{
for (int j = 0; j < genNames.Length; j++)
{
if (names.Contains(genNames[j]))
{
matches = true;
break;
}
}
}
if (!matches)
{
throw new Exception(
"No match for certificate CRL issuing distribution point name to cRLIssuer CRL distribution point.");
}
}
// verify that one of the names in
// the IDP matches one of the names in the cRLIssuer field of
// the DP
else
{
if (dp.CrlIssuer == null)
{
throw new Exception("Either the cRLIssuer or the distributionPoint field must "
+ "be contained in DistributionPoint.");
}
GeneralName[] genNames = dp.CrlIssuer.GetNames();
for (int j = 0; j < genNames.Length; j++)
{
if (names.Contains(genNames[j]))
{
matches = true;
break;
}
}
if (!matches)
{
throw new Exception(
"No match for certificate CRL issuing distribution point name to cRLIssuer CRL distribution point.");
}
}
}
BasicConstraints bc = null;
try
{
bc = BasicConstraints.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(
(IX509Extension)cert, X509Extensions.BasicConstraints));
}
catch (Exception e)
{
throw new Exception("Basic constraints extension could not be decoded.", e);
}
//if (cert is X509Certificate)
{
// (b) (2) (ii)
if (idp.OnlyContainsUserCerts && ((bc != null) && bc.IsCA()))
{
throw new Exception("CA Cert CRL only contains user certificates.");
}
// (b) (2) (iii)
if (idp.OnlyContainsCACerts && (bc == null || !bc.IsCA()))
{
throw new Exception("End CRL only contains CA certificates.");
}
}
// (b) (2) (iv)
if (idp.OnlyContainsAttributeCerts)
{
throw new Exception("onlyContainsAttributeCerts boolean is asserted.");
}
}
}
internal static ISet ProcessCrlA1i(
DateTime currentDate,
PkixParameters paramsPKIX,
X509Certificate cert,
X509Crl crl)
{
ISet deltaSet = new HashSet();
if (paramsPKIX.IsUseDeltasEnabled)
{
CrlDistPoint freshestCRL = null;
try
{
freshestCRL = CrlDistPoint.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.FreshestCrl));
}
catch (Exception e)
{
throw new Exception("Freshest CRL extension could not be decoded from certificate.", e);
}
if (freshestCRL == null)
{
try
{
freshestCRL = CrlDistPoint.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(crl, X509Extensions.FreshestCrl));
}
catch (Exception e)
{
throw new Exception("Freshest CRL extension could not be decoded from CRL.", e);
}
}
if (freshestCRL != null)
{
try
{
PkixCertPathValidatorUtilities.AddAdditionalStoresFromCrlDistributionPoint(freshestCRL, paramsPKIX);
}
catch (Exception e)
{
throw new Exception(
"No new delta CRL locations could be added from Freshest CRL extension.", e);
}
// get delta CRL(s)
try
{
deltaSet.AddAll(PkixCertPathValidatorUtilities.GetDeltaCrls(currentDate, paramsPKIX, crl));
}
catch (Exception e)
{
throw new Exception("Exception obtaining delta CRLs.", e);
}
}
}
return deltaSet;
}
private BigInteger GetCrlNumber(X509Crl crl)
{
//byte[] crlNumberExtensionValue = crl.GetExtensionValue(X509Extensions.CrlNumber);
Asn1OctetString crlNumberExtensionValue = crl.GetExtensionValue(X509Extensions.CrlNumber);
if (null == crlNumberExtensionValue)
{
return null;
}
try
{
//DerOctetString octetString = (DerOctetString)(new ASN1InputStream(new ByteArrayInputStream
// (crlNumberExtensionValue)).ReadObject());
DerOctetString octetString = (DerOctetString)crlNumberExtensionValue;
byte[] octets = octetString.GetOctets();
DerInteger integer = (DerInteger)new Asn1InputStream(octets).ReadObject();
BigInteger crlNumber = integer.PositiveValue;
return crlNumber;
}
catch (IOException e)
{
throw new RuntimeException("IO error: " + e.Message, e);
}
}
internal static void ProcessCrlI(
DateTime validDate,
X509Crl deltacrl,
object cert,
CertStatus certStatus,
PkixParameters pkixParams)
{
if (pkixParams.IsUseDeltasEnabled && deltacrl != null)
{
PkixCertPathValidatorUtilities.GetCertStatus(validDate, deltacrl, cert, certStatus);
}
}
/// <summary>
/// Finds the specified certificate revocation list.
/// </summary>
/// <remarks>
/// Searches the database for the specified CRL, returning the matching record with
/// the desired fields populated.
/// </remarks>
/// <returns>The matching record if found; otherwise <c>null</c>.</returns>
/// <param name="crl">The certificate revocation list.</param>
/// <param name="fields">The desired fields.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="crl"/> is <c>null</c>.
/// </exception>
public X509CrlRecord Find (X509Crl crl, X509CrlRecordFields fields)
{
if (crl == null)
throw new ArgumentNullException ("crl");
using (var command = GetSelectCommand (crl, fields)) {
var reader = command.ExecuteReader ();
try {
if (reader.Read ()) {
var parser = new X509CrlParser ();
var buffer = new byte[4096];
return LoadCrlRecord (reader, parser, ref buffer);
}
} finally {
reader.Close ();
}
}
return null;
}
/**
* If the DP includes cRLIssuer, then verify that the issuer field in the
* complete CRL matches cRLIssuer in the DP and that the complete CRL
* contains an
* g distribution point extension with the indirectCRL
* boolean asserted. Otherwise, verify that the CRL issuer matches the
* certificate issuer.
*
* @param dp The distribution point.
* @param cert The certificate ot attribute certificate.
* @param crl The CRL for <code>cert</code>.
* @throws AnnotatedException if one of the above conditions does not apply or an error
* occurs.
*/
internal static void ProcessCrlB1(
DistributionPoint dp,
object cert,
X509Crl crl)
{
Asn1Object idp = PkixCertPathValidatorUtilities.GetExtensionValue(
crl, X509Extensions.IssuingDistributionPoint);
bool isIndirect = false;
if (idp != null)
{
if (IssuingDistributionPoint.GetInstance(idp).IsIndirectCrl)
{
isIndirect = true;
}
}
byte[] issuerBytes = crl.IssuerDN.GetEncoded();
bool matchIssuer = false;
if (dp.CrlIssuer != null)
{
GeneralName[] genNames = dp.CrlIssuer.GetNames();
for (int j = 0; j < genNames.Length; j++)
{
if (genNames[j].TagNo == GeneralName.DirectoryName)
{
try
{
if (Org.BouncyCastle.Utilities.Arrays.AreEqual(genNames[j].Name.ToAsn1Object().GetEncoded(), issuerBytes))
{
matchIssuer = true;
}
}
catch (IOException e)
{
throw new Exception(
"CRL issuer information from distribution point cannot be decoded.", e);
}
}
}
if (matchIssuer && !isIndirect)
{
throw new Exception("Distribution point contains cRLIssuer field but CRL is not indirect.");
}
if (!matchIssuer)
{
throw new Exception("CRL issuer of CRL does not match CRL issuer of distribution point.");
}
}
else
{
if (crl.IssuerDN.Equivalent(PkixCertPathValidatorUtilities.GetIssuerPrincipal(cert), true))
{
matchIssuer = true;
}
}
if (!matchIssuer)
{
throw new Exception("Cannot find matching CRL issuer for certificate.");
}
}
/**
* Loads the default root certificates at <java.home>/lib/security/cacerts
* with the default provider.
* @return a <CODE>KeyStore</CODE>
*/
// public static KeyStore LoadCacertsKeyStore() {
// return LoadCacertsKeyStore(null);
// }
/**
* Loads the default root certificates at <java.home>/lib/security/cacerts.
* @param provider the provider or <code>null</code> for the default provider
* @return a <CODE>KeyStore</CODE>
*/
// public static KeyStore LoadCacertsKeyStore(String provider) {
// File file = new File(System.GetProperty("java.home"), "lib");
// file = new File(file, "security");
// file = new File(file, "cacerts");
// FileInputStream fin = null;
// try {
// fin = new FileInputStream(file);
// KeyStore k;
// if (provider == null)
// k = KeyStore.GetInstance("JKS");
// else
// k = KeyStore.GetInstance("JKS", provider);
// k.Load(fin, null);
// return k;
// }
// catch (Exception e) {
// throw new ExceptionConverter(e);
// }
// finally {
// try{fin.Close();}catch(Exception ex){}
// }
// }
/**
* Verifies a single certificate.
* @param cert the certificate to verify
* @param crls the certificate revocation list or <CODE>null</CODE>
* @param calendar the date or <CODE>null</CODE> for the current date
* @return a <CODE>String</CODE> with the error description or <CODE>null</CODE>
* if no error
*/
public static String VerifyCertificate(X509Certificate cert, X509Crl[] crls, DateTime calendar) {
try {
if (!cert.IsValid(calendar))
return "The certificate has expired or is not yet valid";
}
catch (Exception e) {
return e.ToString();
}
return null;
}
internal static ReasonsMask ProcessCrlD(
X509Crl crl,
DistributionPoint dp)
//throws AnnotatedException
{
IssuingDistributionPoint idp = null;
try
{
idp = IssuingDistributionPoint.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(crl, X509Extensions.IssuingDistributionPoint));
}
catch (Exception e)
{
throw new Exception("issuing distribution point extension could not be decoded.", e);
}
// (d) (1)
if (idp != null && idp.OnlySomeReasons != null && dp.Reasons != null)
{
return new ReasonsMask(dp.Reasons.IntValue).Intersect(new ReasonsMask(idp.OnlySomeReasons
.IntValue));
}
// (d) (4)
if ((idp == null || idp.OnlySomeReasons == null) && dp.Reasons == null)
{
return ReasonsMask.AllReasons;
}
// (d) (2) and (d)(3)
ReasonsMask dpReasons = null;
if (dp.Reasons == null)
{
dpReasons = ReasonsMask.AllReasons;
}
else
{
dpReasons = new ReasonsMask(dp.Reasons.IntValue);
}
ReasonsMask idpReasons = null;
if (idp == null)
{
idpReasons = ReasonsMask.AllReasons;
}
else
{
idpReasons = new ReasonsMask(idp.OnlySomeReasons.IntValue);
}
return dpReasons.Intersect(idpReasons);
}
/// <summary> /// Gets the database command to select the record for the specified CRL. /// </summary> /// <remarks> /// Gets the database command to select the record for the specified CRL. /// </remarks> /// <returns>The database command.</returns> /// <param name="crl">The X.509 CRL.</param> /// <param name="fields">The fields to return.</param> protected abstract IDbCommand GetSelectCommand (X509Crl crl, X509CrlRecordFields fields);
internal static AsymmetricKeyParameter ProcessCrlG(
X509Crl crl,
ISet keys)
{
Exception lastException = null;
foreach (AsymmetricKeyParameter key in keys)
{
try
{
crl.Verify(key);
return key;
}
catch (Exception e)
{
lastException = e;
}
}
throw new Exception("Cannot verify CRL.", lastException);
}
/// <summary>
/// Import the specified certificate revocation list.
/// </summary>
/// <remarks>
/// Import the specified certificate revocation list.
/// </remarks>
/// <param name="crl">The certificate revocation list.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="crl"/> is <c>null</c>.
/// </exception>
public override void Import (X509Crl crl)
{
if (crl == null)
throw new ArgumentNullException ("crl");
// TODO: figure out where to store the CRLs...
}
