GitBucket
Newer
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
#pragma warning disable
using System;
using System.Collections;
using System.Globalization;
using System.IO;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Asn1.X509;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Math;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Security.Certificates;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Collections;
using BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Date;
using BestHTTP.SecureProtocol.Org.BouncyCastle.X509;
using BestHTTP.SecureProtocol.Org.BouncyCastle.X509.Store;
namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Pkix
{
public class Rfc3280CertPathUtilities
{
private static readonly PkixCrlUtilities CrlUtilities = new PkixCrlUtilities();
internal static readonly string ANY_POLICY = "2.5.29.32.0";
// key usage bits
internal static readonly int KEY_CERT_SIGN = 5;
internal static readonly int CRL_SIGN = 6;
/**
* 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 = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.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 void ProcessCertBC(
PkixCertPath certPath,
int index,
PkixNameConstraintValidator nameConstraintValidator)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
int n = certs.Count;
// i as defined in the algorithm description
int i = n - index;
//
// (b), (c) permitted and excluded subtree checking.
//
if (!(PkixCertPathValidatorUtilities.IsSelfIssued(cert) && (i < n)))
{
X509Name principal = cert.SubjectDN;
Asn1InputStream aIn = new Asn1InputStream(principal.GetEncoded());
Asn1Sequence dns;
try
{
dns = DerSequence.GetInstance(aIn.ReadObject());
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Exception extracting subject name when checking subtrees.", e, certPath, index);
}
try
{
nameConstraintValidator.CheckPermittedDN(dns);
nameConstraintValidator.CheckExcludedDN(dns);
}
catch (PkixNameConstraintValidatorException e)
{
throw new PkixCertPathValidatorException(
"Subtree check for certificate subject failed.", e, certPath, index);
}
GeneralNames altName = null;
try
{
altName = GeneralNames.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.SubjectAlternativeName));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Subject alternative name extension could not be decoded.", e, certPath, index);
}
IList emails = X509Name.GetInstance(dns).GetValueList(X509Name.EmailAddress);
foreach (string email in emails)
{
GeneralName emailAsGeneralName = new GeneralName(GeneralName.Rfc822Name, email);
try
{
nameConstraintValidator.checkPermitted(emailAsGeneralName);
nameConstraintValidator.checkExcluded(emailAsGeneralName);
}
catch (PkixNameConstraintValidatorException ex)
{
throw new PkixCertPathValidatorException(
"Subtree check for certificate subject alternative email failed.", ex, certPath, index);
}
}
if (altName != null)
{
GeneralName[] genNames = null;
try
{
genNames = altName.GetNames();
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Subject alternative name contents could not be decoded.", e, certPath, index);
}
foreach (GeneralName genName in genNames)
{
try
{
nameConstraintValidator.checkPermitted(genName);
nameConstraintValidator.checkExcluded(genName);
}
catch (PkixNameConstraintValidatorException e)
{
throw new PkixCertPathValidatorException(
"Subtree check for certificate subject alternative name failed.", e, certPath, index);
}
}
}
}
}
internal static void PrepareNextCertA(
PkixCertPath certPath,
int index)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
//
// (a) check the policy mappings
//
Asn1Sequence pm = null;
try
{
pm = Asn1Sequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.PolicyMappings));
}
catch (Exception ex)
{
throw new PkixCertPathValidatorException(
"Policy mappings extension could not be decoded.", ex, certPath, index);
}
if (pm != null)
{
Asn1Sequence mappings = pm;
for (int j = 0; j < mappings.Count; j++)
{
DerObjectIdentifier issuerDomainPolicy = null;
DerObjectIdentifier subjectDomainPolicy = null;
try
{
Asn1Sequence mapping = DerSequence.GetInstance(mappings[j]);
issuerDomainPolicy = DerObjectIdentifier.GetInstance(mapping[0]);
subjectDomainPolicy = DerObjectIdentifier.GetInstance(mapping[1]);
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Policy mappings extension contents could not be decoded.", e, certPath, index);
}
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(issuerDomainPolicy.Id))
throw new PkixCertPathValidatorException(
"IssuerDomainPolicy is anyPolicy", null, certPath, index);
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(subjectDomainPolicy.Id))
throw new PkixCertPathValidatorException(
"SubjectDomainPolicy is anyPolicy,", null, certPath, index);
}
}
}
internal static PkixPolicyNode ProcessCertD(
PkixCertPath certPath,
int index,
ISet acceptablePolicies,
PkixPolicyNode validPolicyTree,
IList[] policyNodes,
int inhibitAnyPolicy)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
int n = certs.Count;
// i as defined in the algorithm description
int i = n - index;
//
// (d) policy Information checking against initial policy and
// policy mapping
//
Asn1Sequence certPolicies = null;
try
{
certPolicies = DerSequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.CertificatePolicies));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Could not read certificate policies extension from certificate.", e, certPath, index);
}
if (certPolicies != null && validPolicyTree != null)
{
//
// (d) (1)
//
ISet pols = new HashSet();
foreach (Asn1Encodable ae in certPolicies)
{
PolicyInformation pInfo = PolicyInformation.GetInstance(ae.ToAsn1Object());
DerObjectIdentifier pOid = pInfo.PolicyIdentifier;
pols.Add(pOid.Id);
if (!Rfc3280CertPathUtilities.ANY_POLICY.Equals(pOid.Id))
{
ISet pq = null;
try
{
pq = PkixCertPathValidatorUtilities.GetQualifierSet(pInfo.PolicyQualifiers);
}
catch (PkixCertPathValidatorException ex)
{
throw new PkixCertPathValidatorException(
"Policy qualifier info set could not be build.", ex, certPath, index);
}
bool match = PkixCertPathValidatorUtilities.ProcessCertD1i(i, policyNodes, pOid, pq);
if (!match)
{
PkixCertPathValidatorUtilities.ProcessCertD1ii(i, policyNodes, pOid, pq);
}
}
}
if (acceptablePolicies.IsEmpty || acceptablePolicies.Contains(Rfc3280CertPathUtilities.ANY_POLICY))
{
acceptablePolicies.Clear();
acceptablePolicies.AddAll(pols);
}
else
{
ISet t1 = new HashSet();
foreach (object o in acceptablePolicies)
{
if (pols.Contains(o))
{
t1.Add(o);
}
}
acceptablePolicies.Clear();
acceptablePolicies.AddAll(t1);
}
//
// (d) (2)
//
if ((inhibitAnyPolicy > 0) || ((i < n) && PkixCertPathValidatorUtilities.IsSelfIssued(cert)))
{
foreach (Asn1Encodable ae in certPolicies)
{
PolicyInformation pInfo = PolicyInformation.GetInstance(ae.ToAsn1Object());
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(pInfo.PolicyIdentifier.Id))
{
ISet _apq = PkixCertPathValidatorUtilities.GetQualifierSet(pInfo.PolicyQualifiers);
IList _nodes = policyNodes[i - 1];
for (int k = 0; k < _nodes.Count; k++)
{
PkixPolicyNode _node = (PkixPolicyNode)_nodes[k];
IEnumerator _policySetIter = _node.ExpectedPolicies.GetEnumerator();
while (_policySetIter.MoveNext())
{
object _tmp = _policySetIter.Current;
string _policy;
if (_tmp is string)
{
_policy = (string)_tmp;
}
else if (_tmp is DerObjectIdentifier)
{
_policy = ((DerObjectIdentifier)_tmp).Id;
}
else
{
continue;
}
bool _found = false;
foreach (PkixPolicyNode _child in _node.Children)
{
if (_policy.Equals(_child.ValidPolicy))
{
_found = true;
}
}
if (!_found)
{
ISet _newChildExpectedPolicies = new HashSet();
_newChildExpectedPolicies.Add(_policy);
PkixPolicyNode _newChild = new PkixPolicyNode(BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateArrayList(), i,
_newChildExpectedPolicies, _node, _apq, _policy, false);
_node.AddChild(_newChild);
policyNodes[i].Add(_newChild);
}
}
}
break;
}
}
}
PkixPolicyNode _validPolicyTree = validPolicyTree;
//
// (d) (3)
//
for (int j = (i - 1); j >= 0; j--)
{
IList nodes = policyNodes[j];
for (int k = 0; k < nodes.Count; k++)
{
PkixPolicyNode node = (PkixPolicyNode)nodes[k];
if (!node.HasChildren)
{
_validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(_validPolicyTree, policyNodes,
node);
if (_validPolicyTree == null)
{
break;
}
}
}
}
//
// d (4)
//
ISet criticalExtensionOids = cert.GetCriticalExtensionOids();
if (criticalExtensionOids != null)
{
bool critical = criticalExtensionOids.Contains(X509Extensions.CertificatePolicies.Id);
IList nodes = policyNodes[i];
for (int j = 0; j < nodes.Count; j++)
{
PkixPolicyNode node = (PkixPolicyNode)nodes[j];
node.IsCritical = critical;
}
}
return _validPolicyTree;
}
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 (BestHTTP.SecureProtocol.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.");
}
}
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);
}
/**
* 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 = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.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 = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateArrayList();
IList validKeys = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.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("CertPath for CRL signer failed to validate.", 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;
}
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);
}
internal static X509Crl ProcessCrlH(
ISet deltaCrls,
AsymmetricKeyParameter key)
{
Exception lastException = null;
foreach (X509Crl crl in deltaCrls)
{
try
{
crl.Verify(key);
return crl;
}
catch (Exception e)
{
lastException = e;
}
}
if (lastException != null)
{
throw new Exception("Cannot verify delta CRL.", lastException);
}
return null;
}
/**
* Checks a distribution point for revocation information for the
* certificate <code>cert</code>.
*
* @param dp The distribution point to consider.
* @param paramsPKIX PKIX parameters.
* @param cert Certificate to check if it is revoked.
* @param validDate The date when the certificate revocation status should be
* checked.
* @param defaultCRLSignCert The issuer certificate of the certificate <code>cert</code>.
* @param defaultCRLSignKey The public key of the issuer certificate
* <code>defaultCRLSignCert</code>.
* @param certStatus The current certificate revocation status.
* @param reasonMask The reasons mask which is already checked.
* @param certPathCerts The certificates of the certification path.
* @throws AnnotatedException if the certificate is revoked or the status cannot be checked
* or some error occurs.
*/
private static void CheckCrl(
DistributionPoint dp,
PkixParameters paramsPKIX,
X509Certificate cert,
DateTime validDate,
X509Certificate defaultCRLSignCert,
AsymmetricKeyParameter defaultCRLSignKey,
CertStatus certStatus,
ReasonsMask reasonMask,
IList certPathCerts)
//throws AnnotatedException
{
DateTime currentDate = DateTime.UtcNow;
if (validDate.Ticks > currentDate.Ticks)
{
throw new Exception("Validation time is in future.");
}
// (a)
/*
* We always get timely valid CRLs, so there is no step (a) (1).
* "locally cached" CRLs are assumed to be in getStore(), additional
* CRLs must be enabled in the ExtendedPKIXParameters and are in
* getAdditionalStore()
*/
ISet crls = PkixCertPathValidatorUtilities.GetCompleteCrls(dp, cert, currentDate, paramsPKIX);
bool validCrlFound = false;
Exception lastException = null;
IEnumerator crl_iter = crls.GetEnumerator();
while (crl_iter.MoveNext() && certStatus.Status == CertStatus.Unrevoked && !reasonMask.IsAllReasons)
{
try
{
X509Crl crl = (X509Crl)crl_iter.Current;
// (d)
ReasonsMask interimReasonsMask = Rfc3280CertPathUtilities.ProcessCrlD(crl, dp);
// (e)
/*
* The reasons mask is updated at the end, so only valid CRLs
* can update it. If this CRL does not contain new reasons it
* must be ignored.
*/
if (!interimReasonsMask.HasNewReasons(reasonMask))
{
continue;
}
// (f)
ISet keys = Rfc3280CertPathUtilities.ProcessCrlF(crl, cert, defaultCRLSignCert, defaultCRLSignKey,
paramsPKIX, certPathCerts);
// (g)
AsymmetricKeyParameter key = Rfc3280CertPathUtilities.ProcessCrlG(crl, keys);
X509Crl deltaCRL = null;
if (paramsPKIX.IsUseDeltasEnabled)
{
// get delta CRLs
ISet deltaCRLs = PkixCertPathValidatorUtilities.GetDeltaCrls(currentDate, paramsPKIX, crl);
// we only want one valid delta CRL
// (h)
deltaCRL = Rfc3280CertPathUtilities.ProcessCrlH(deltaCRLs, key);
}
/*
* CRL must be be valid at the current time, not the validation
* time. If a certificate is revoked with reason keyCompromise,
* cACompromise, it can be used for forgery, also for the past.
* This reason may not be contained in older CRLs.
*/
/*
* in the chain model signatures stay valid also after the
* certificate has been expired, so they do not have to be in
* the CRL validity time
*/
if (paramsPKIX.ValidityModel != PkixParameters.ChainValidityModel)
{
/*
* if a certificate has expired, but was revoked, it is not
* more in the CRL, so it would be regarded as valid if the
* first check is not done
*/
if (cert.NotAfter.Ticks < crl.ThisUpdate.Ticks)
{
throw new Exception("No valid CRL for current time found.");
}
}
Rfc3280CertPathUtilities.ProcessCrlB1(dp, cert, crl);
// (b) (2)
Rfc3280CertPathUtilities.ProcessCrlB2(dp, cert, crl);
// (c)
Rfc3280CertPathUtilities.ProcessCrlC(deltaCRL, crl, paramsPKIX);
// (i)
Rfc3280CertPathUtilities.ProcessCrlI(validDate, deltaCRL, cert, certStatus, paramsPKIX);
// (j)
Rfc3280CertPathUtilities.ProcessCrlJ(validDate, crl, cert, certStatus);
// (k)
if (certStatus.Status == CrlReason.RemoveFromCrl)
{
certStatus.Status = CertStatus.Unrevoked;
}
// update reasons mask
reasonMask.AddReasons(interimReasonsMask);
ISet criticalExtensions = crl.GetCriticalExtensionOids();
if (criticalExtensions != null)
{
criticalExtensions = new HashSet(criticalExtensions);
criticalExtensions.Remove(X509Extensions.IssuingDistributionPoint.Id);
criticalExtensions.Remove(X509Extensions.DeltaCrlIndicator.Id);
if (!criticalExtensions.IsEmpty)
throw new Exception("CRL contains unsupported critical extensions.");
}
if (deltaCRL != null)
{
criticalExtensions = deltaCRL.GetCriticalExtensionOids();
if (criticalExtensions != null)
{
criticalExtensions = new HashSet(criticalExtensions);
criticalExtensions.Remove(X509Extensions.IssuingDistributionPoint.Id);
criticalExtensions.Remove(X509Extensions.DeltaCrlIndicator.Id);
if (!criticalExtensions.IsEmpty)
throw new Exception("Delta CRL contains unsupported critical extension.");
}
}
validCrlFound = true;
}
catch (Exception e)
{
lastException = e;
}
}
if (!validCrlFound)
{
throw lastException;
}
}
/**
* Checks a certificate if it is revoked.
*
* @param paramsPKIX PKIX parameters.
* @param cert Certificate to check if it is revoked.
* @param validDate The date when the certificate revocation status should be
* checked.
* @param sign The issuer certificate of the certificate <code>cert</code>.
* @param workingPublicKey The public key of the issuer certificate <code>sign</code>.
* @param certPathCerts The certificates of the certification path.
* @throws AnnotatedException if the certificate is revoked or the status cannot be checked
* or some error occurs.
*/
protected static void CheckCrls(
PkixParameters paramsPKIX,
X509Certificate cert,
DateTime validDate,
X509Certificate sign,
AsymmetricKeyParameter workingPublicKey,
IList certPathCerts)
{
Exception lastException = null;
CrlDistPoint crldp = null;
try
{
crldp = CrlDistPoint.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.CrlDistributionPoints));
}
catch (Exception e)
{
throw new Exception("CRL distribution point extension could not be read.", e);
}
try
{
PkixCertPathValidatorUtilities.AddAdditionalStoresFromCrlDistributionPoint(crldp, paramsPKIX);
}
catch (Exception e)
{
throw new Exception(
"No additional CRL locations could be decoded from CRL distribution point extension.", e);
}
CertStatus certStatus = new CertStatus();
ReasonsMask reasonsMask = new ReasonsMask();
bool validCrlFound = false;
// for each distribution point
if (crldp != null)
{
DistributionPoint[] dps = null;
try
{
dps = crldp.GetDistributionPoints();
}
catch (Exception e)
{
throw new Exception("Distribution points could not be read.", e);
}
if (dps != null)
{
for (int i = 0; i < dps.Length && certStatus.Status == CertStatus.Unrevoked && !reasonsMask.IsAllReasons; i++)
{
PkixParameters paramsPKIXClone = (PkixParameters)paramsPKIX.Clone();
try
{
CheckCrl(dps[i], paramsPKIXClone, cert, validDate, sign, workingPublicKey, certStatus, reasonsMask, certPathCerts);
validCrlFound = true;
}
catch (Exception e)
{
lastException = e;
}
}
}
}
/*
* If the revocation status has not been determined, repeat the process
* above with any available CRLs not specified in a distribution point
* but issued by the certificate issuer.
*/
if (certStatus.Status == CertStatus.Unrevoked && !reasonsMask.IsAllReasons)
{
try
{
/*
* assume a DP with both the reasons and the cRLIssuer fields
* omitted and a distribution point name of the certificate
* issuer.
*/
Asn1Object issuer = null;
try
{
issuer = new Asn1InputStream(cert.IssuerDN.GetEncoded()).ReadObject();
}
catch (Exception e)
{
throw new Exception("Issuer from certificate for CRL could not be reencoded.", e);
}
DistributionPoint dp = new DistributionPoint(new DistributionPointName(0, new GeneralNames(
new GeneralName(GeneralName.DirectoryName, issuer))), null, null);
PkixParameters paramsPKIXClone = (PkixParameters)paramsPKIX.Clone();
CheckCrl(dp, paramsPKIXClone, cert, validDate, sign, workingPublicKey, certStatus, reasonsMask,
certPathCerts);
validCrlFound = true;
}
catch (Exception e)
{
lastException = e;
}
}
if (!validCrlFound)
{
throw lastException;
}
if (certStatus.Status != CertStatus.Unrevoked)
{
// This format is enforced by the NistCertPath tests
string formattedDate = certStatus.RevocationDate.Value.ToString(
"ddd MMM dd HH:mm:ss K yyyy");
string message = "Certificate revocation after " + formattedDate;
message += ", reason: " + CrlReasons[certStatus.Status];
throw new Exception(message);
}
if (!reasonsMask.IsAllReasons && certStatus.Status == CertStatus.Unrevoked)
{
certStatus.Status = CertStatus.Undetermined;
}
if (certStatus.Status == CertStatus.Undetermined)
{
throw new Exception("Certificate status could not be determined.");
}
}
internal static PkixPolicyNode PrepareCertB(
PkixCertPath certPath,
int index,
IList[] policyNodes,
PkixPolicyNode validPolicyTree,
int policyMapping)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
int n = certs.Count;
// i as defined in the algorithm description
int i = n - index;
// (b)
//
Asn1Sequence pm = null;
try
{
pm = (Asn1Sequence)Asn1Sequence.GetInstance(PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.PolicyMappings));
}
catch (Exception ex)
{
throw new PkixCertPathValidatorException(
"Policy mappings extension could not be decoded.", ex, certPath, index);
}
PkixPolicyNode _validPolicyTree = validPolicyTree;
if (pm != null)
{
Asn1Sequence mappings = (Asn1Sequence)pm;
IDictionary m_idp = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateHashtable();
ISet s_idp = new HashSet();
for (int j = 0; j < mappings.Count; j++)
{
Asn1Sequence mapping = (Asn1Sequence) mappings[j];
string id_p = ((DerObjectIdentifier) mapping[0]).Id;
string sd_p = ((DerObjectIdentifier) mapping[1]).Id;
ISet tmp;
if (!m_idp.Contains(id_p))
{
tmp = new HashSet();
tmp.Add(sd_p);
m_idp[id_p] = tmp;
s_idp.Add(id_p);
}
else
{
tmp = (ISet)m_idp[id_p];
tmp.Add(sd_p);
}
}
IEnumerator it_idp = s_idp.GetEnumerator();
while (it_idp.MoveNext())
{
string id_p = (string)it_idp.Current;
//
// (1)
//
if (policyMapping > 0)
{
bool idp_found = false;
IEnumerator nodes_i = policyNodes[i].GetEnumerator();
while (nodes_i.MoveNext())
{
PkixPolicyNode node = (PkixPolicyNode)nodes_i.Current;
if (node.ValidPolicy.Equals(id_p))
{
idp_found = true;
node.ExpectedPolicies = (ISet)m_idp[id_p];
break;
}
}
if (!idp_found)
{
nodes_i = policyNodes[i].GetEnumerator();
while (nodes_i.MoveNext())
{
PkixPolicyNode node = (PkixPolicyNode)nodes_i.Current;
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(node.ValidPolicy))
{
ISet pq = null;
Asn1Sequence policies = null;
try
{
policies = (Asn1Sequence)PkixCertPathValidatorUtilities.GetExtensionValue(cert,
X509Extensions.CertificatePolicies);
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Certificate policies extension could not be decoded.", e, certPath, index);
}
foreach (Asn1Encodable ae in policies)
{
PolicyInformation pinfo = null;
try
{
pinfo = PolicyInformation.GetInstance(ae.ToAsn1Object());
}
catch (Exception ex)
{
throw new PkixCertPathValidatorException(
"Policy information could not be decoded.", ex, certPath, index);
}
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(pinfo.PolicyIdentifier.Id))
{
try
{
pq = PkixCertPathValidatorUtilities
.GetQualifierSet(pinfo.PolicyQualifiers);
}
catch (PkixCertPathValidatorException ex)
{
throw new PkixCertPathValidatorException(
"Policy qualifier info set could not be decoded.", ex, certPath,
index);
}
break;
}
}
bool ci = false;
ISet critExtOids = cert.GetCriticalExtensionOids();
if (critExtOids != null)
{
ci = critExtOids.Contains(X509Extensions.CertificatePolicies.Id);
}
PkixPolicyNode p_node = (PkixPolicyNode)node.Parent;
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(p_node.ValidPolicy))
{
PkixPolicyNode c_node = new PkixPolicyNode(BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateArrayList(), i,
(ISet)m_idp[id_p], p_node, pq, id_p, ci);
p_node.AddChild(c_node);
policyNodes[i].Add(c_node);
}
break;
}
}
}
//
// (2)
//
}
else if (policyMapping <= 0)
{
foreach (PkixPolicyNode node in BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateArrayList(policyNodes[i]))
{
if (node.ValidPolicy.Equals(id_p))
{
node.Parent.RemoveChild(node);
for (int k = i - 1; k >= 0; k--)
{
foreach (PkixPolicyNode node2 in BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateArrayList(policyNodes[k]))
{
if (!node2.HasChildren)
{
_validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(
_validPolicyTree, policyNodes, node2);
if (_validPolicyTree == null)
break;
}
}
}
}
}
}
}
}
return _validPolicyTree;
}
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 = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.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 };
}
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;
}
internal static void ProcessCertF(
PkixCertPath certPath,
int index,
PkixPolicyNode validPolicyTree,
int explicitPolicy)
{
//
// (f)
//
if (explicitPolicy <= 0 && validPolicyTree == null)
{
throw new PkixCertPathValidatorException(
"No valid policy tree found when one expected.", null, certPath, index);
}
}
internal static void ProcessCertA(
PkixCertPath certPath,
PkixParameters paramsPKIX,
int index,
AsymmetricKeyParameter workingPublicKey,
X509Name workingIssuerName,
X509Certificate sign)
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (a) verify
//
try
{
// (a) (1)
//
cert.Verify(workingPublicKey);
}
catch (GeneralSecurityException e)
{
throw new PkixCertPathValidatorException("Could not validate certificate signature.", e, certPath, index);
}
try
{
// (a) (2)
//
cert.CheckValidity(PkixCertPathValidatorUtilities
.GetValidCertDateFromValidityModel(paramsPKIX, certPath, index));
}
catch (CertificateExpiredException e)
{
throw new PkixCertPathValidatorException("Could not validate certificate: " + e.Message, e, certPath, index);
}
catch (CertificateNotYetValidException e)
{
throw new PkixCertPathValidatorException("Could not validate certificate: " + e.Message, e, certPath, index);
}
catch (Exception e)
{
throw new PkixCertPathValidatorException("Could not validate time of certificate.", e, certPath, index);
}
//
// (a) (3)
//
if (paramsPKIX.IsRevocationEnabled)
{
try
{
CheckCrls(paramsPKIX, cert, PkixCertPathValidatorUtilities.GetValidCertDateFromValidityModel(paramsPKIX,
certPath, index), sign, workingPublicKey, certs);
}
catch (Exception e)
{
Exception cause = e.InnerException;
if (cause == null)
{
cause = e;
}
throw new PkixCertPathValidatorException(e.Message, cause, certPath, index);
}
}
//
// (a) (4) name chaining
//
X509Name issuer = PkixCertPathValidatorUtilities.GetIssuerPrincipal(cert);
if (!issuer.Equivalent(workingIssuerName, true))
{
throw new PkixCertPathValidatorException("IssuerName(" + issuer
+ ") does not match SubjectName(" + workingIssuerName + ") of signing certificate.", null,
certPath, index);
}
}
internal static int PrepareNextCertI1(
PkixCertPath certPath,
int index,
int explicitPolicy)
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (i)
//
Asn1Sequence pc = null;
try
{
pc = DerSequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.PolicyConstraints));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Policy constraints extension cannot be decoded.", e, certPath, index);
}
int tmpInt;
if (pc != null)
{
IEnumerator policyConstraints = pc.GetEnumerator();
while (policyConstraints.MoveNext())
{
try
{
Asn1TaggedObject constraint = Asn1TaggedObject.GetInstance(policyConstraints.Current);
if (constraint.TagNo == 0)
{
tmpInt = DerInteger.GetInstance(constraint, false).IntValueExact;
if (tmpInt < explicitPolicy)
{
return tmpInt;
}
break;
}
}
catch (ArgumentException e)
{
throw new PkixCertPathValidatorException(
"Policy constraints extension contents cannot be decoded.", e, certPath, index);
}
}
}
return explicitPolicy;
}
internal static int PrepareNextCertI2(
PkixCertPath certPath,
int index,
int policyMapping)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (i)
//
Asn1Sequence pc = null;
try
{
pc = DerSequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.PolicyConstraints));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Policy constraints extension cannot be decoded.", e, certPath, index);
}
int tmpInt;
if (pc != null)
{
IEnumerator policyConstraints = pc.GetEnumerator();
while (policyConstraints.MoveNext())
{
try
{
Asn1TaggedObject constraint = Asn1TaggedObject.GetInstance(policyConstraints.Current);
if (constraint.TagNo == 1)
{
tmpInt = DerInteger.GetInstance(constraint, false).IntValueExact;
if (tmpInt < policyMapping)
{
return tmpInt;
}
break;
}
}
catch (ArgumentException e)
{
throw new PkixCertPathValidatorException(
"Policy constraints extension contents cannot be decoded.", e, certPath, index);
}
}
}
return policyMapping;
}
internal static void PrepareNextCertG(
PkixCertPath certPath,
int index,
PkixNameConstraintValidator nameConstraintValidator)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (g) handle the name constraints extension
//
NameConstraints nc = null;
try
{
Asn1Sequence ncSeq = DerSequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.NameConstraints));
if (ncSeq != null)
{
nc = new NameConstraints(ncSeq);
}
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Name constraints extension could not be decoded.", e, certPath, index);
}
if (nc != null)
{
//
// (g) (1) permitted subtrees
//
Asn1Sequence permitted = nc.PermittedSubtrees;
if (permitted != null)
{
try
{
nameConstraintValidator.IntersectPermittedSubtree(permitted);
}
catch (Exception ex)
{
throw new PkixCertPathValidatorException(
"Permitted subtrees cannot be build from name constraints extension.", ex, certPath, index);
}
}
//
// (g) (2) excluded subtrees
//
Asn1Sequence excluded = nc.ExcludedSubtrees;
if (excluded != null)
{
IEnumerator e = excluded.GetEnumerator();
try
{
while (e.MoveNext())
{
GeneralSubtree subtree = GeneralSubtree.GetInstance(e.Current);
nameConstraintValidator.AddExcludedSubtree(subtree);
}
}
catch (Exception ex)
{
throw new PkixCertPathValidatorException(
"Excluded subtrees cannot be build from name constraints extension.", ex, certPath, index);
}
}
}
}
internal static int PrepareNextCertJ(
PkixCertPath certPath,
int index,
int inhibitAnyPolicy)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (j)
//
DerInteger iap = null;
try
{
iap = DerInteger.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.InhibitAnyPolicy));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Inhibit any-policy extension cannot be decoded.", e, certPath, index);
}
if (iap != null)
{
int _inhibitAnyPolicy = iap.IntValueExact;
if (_inhibitAnyPolicy < inhibitAnyPolicy)
return _inhibitAnyPolicy;
}
return inhibitAnyPolicy;
}
internal static void PrepareNextCertK(
PkixCertPath certPath,
int index)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (k)
//
BasicConstraints bc = null;
try
{
bc = BasicConstraints.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.BasicConstraints));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException("Basic constraints extension cannot be decoded.", e, certPath,
index);
}
if (bc != null)
{
if (!(bc.IsCA()))
throw new PkixCertPathValidatorException("Not a CA certificate");
}
else
{
throw new PkixCertPathValidatorException("Intermediate certificate lacks BasicConstraints");
}
}
internal static int PrepareNextCertL(
PkixCertPath certPath,
int index,
int maxPathLength)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (l)
//
if (!PkixCertPathValidatorUtilities.IsSelfIssued(cert))
{
if (maxPathLength <= 0)
{
throw new PkixCertPathValidatorException("Max path length not greater than zero", null, certPath, index);
}
return maxPathLength - 1;
}
return maxPathLength;
}
internal static int PrepareNextCertM(
PkixCertPath certPath,
int index,
int maxPathLength)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (m)
//
BasicConstraints bc = null;
try
{
bc = BasicConstraints.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.BasicConstraints));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException("Basic constraints extension cannot be decoded.", e, certPath,
index);
}
if (bc != null)
{
BigInteger _pathLengthConstraint = bc.PathLenConstraint;
if (_pathLengthConstraint != null)
{
int _plc = _pathLengthConstraint.IntValue;
if (_plc < maxPathLength)
{
return _plc;
}
}
}
return maxPathLength;
}
internal static void PrepareNextCertN(
PkixCertPath certPath,
int index)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (n)
//
bool[] _usage = cert.GetKeyUsage();
if ((_usage != null) && !_usage[Rfc3280CertPathUtilities.KEY_CERT_SIGN])
{
throw new PkixCertPathValidatorException(
"Issuer certificate keyusage extension is critical and does not permit key signing.", null,
certPath, index);
}
}
internal static void PrepareNextCertO(
PkixCertPath certPath,
int index,
ISet criticalExtensions,
IList pathCheckers)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (o)
//
IEnumerator tmpIter = pathCheckers.GetEnumerator();
while (tmpIter.MoveNext())
{
try
{
((PkixCertPathChecker)tmpIter.Current).Check(cert, criticalExtensions);
}
catch (PkixCertPathValidatorException e)
{
throw new PkixCertPathValidatorException(e.Message, e.InnerException, certPath, index);
}
}
if (!criticalExtensions.IsEmpty)
{
throw new PkixCertPathValidatorException("Certificate has unsupported critical extension.", null, certPath,
index);
}
}
internal static int PrepareNextCertH1(
PkixCertPath certPath,
int index,
int explicitPolicy)
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (h)
//
if (!PkixCertPathValidatorUtilities.IsSelfIssued(cert))
{
//
// (1)
//
if (explicitPolicy != 0)
return explicitPolicy - 1;
}
return explicitPolicy;
}
internal static int PrepareNextCertH2(
PkixCertPath certPath,
int index,
int policyMapping)
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (h)
//
if (!PkixCertPathValidatorUtilities.IsSelfIssued(cert))
{
//
// (2)
//
if (policyMapping != 0)
return policyMapping - 1;
}
return policyMapping;
}
internal static int PrepareNextCertH3(
PkixCertPath certPath,
int index,
int inhibitAnyPolicy)
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (h)
//
if (!PkixCertPathValidatorUtilities.IsSelfIssued(cert))
{
//
// (3)
//
if (inhibitAnyPolicy != 0)
return inhibitAnyPolicy - 1;
}
return inhibitAnyPolicy;
}
internal static int WrapupCertA(
int explicitPolicy,
X509Certificate cert)
{
//
// (a)
//
if (!PkixCertPathValidatorUtilities.IsSelfIssued(cert) && (explicitPolicy != 0))
{
explicitPolicy--;
}
return explicitPolicy;
}
internal static int WrapupCertB(
PkixCertPath certPath,
int index,
int explicitPolicy)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (b)
//
int tmpInt;
Asn1Sequence pc = null;
try
{
pc = DerSequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.PolicyConstraints));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException("Policy constraints could not be decoded.", e, certPath, index);
}
if (pc != null)
{
IEnumerator policyConstraints = pc.GetEnumerator();
while (policyConstraints.MoveNext())
{
Asn1TaggedObject constraint = (Asn1TaggedObject)policyConstraints.Current;
switch (constraint.TagNo)
{
case 0:
try
{
tmpInt = DerInteger.GetInstance(constraint, false).IntValueExact;
}
catch (Exception e)
{
throw new PkixCertPathValidatorException(
"Policy constraints requireExplicitPolicy field could not be decoded.", e, certPath,
index);
}
if (tmpInt == 0)
{
return 0;
}
break;
}
}
}
return explicitPolicy;
}
internal static void WrapupCertF(
PkixCertPath certPath,
int index,
IList pathCheckers,
ISet criticalExtensions)
//throws CertPathValidatorException
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
IEnumerator tmpIter = pathCheckers.GetEnumerator();
while (tmpIter.MoveNext())
{
try
{
((PkixCertPathChecker)tmpIter.Current).Check(cert, criticalExtensions);
}
catch (PkixCertPathValidatorException e)
{
throw new PkixCertPathValidatorException("Additional certificate path checker failed.", e, certPath,
index);
}
}
if (!criticalExtensions.IsEmpty)
{
throw new PkixCertPathValidatorException("Certificate has unsupported critical extension",
null, certPath, index);
}
}
internal static PkixPolicyNode WrapupCertG(
PkixCertPath certPath,
PkixParameters paramsPKIX,
ISet userInitialPolicySet,
int index,
IList[] policyNodes,
PkixPolicyNode validPolicyTree,
ISet acceptablePolicies)
{
int n = certPath.Certificates.Count;
//
// (g)
//
PkixPolicyNode intersection;
//
// (g) (i)
//
if (validPolicyTree == null)
{
if (paramsPKIX.IsExplicitPolicyRequired)
{
throw new PkixCertPathValidatorException(
"Explicit policy requested but none available.", null, certPath, index);
}
intersection = null;
}
else if (PkixCertPathValidatorUtilities.IsAnyPolicy(userInitialPolicySet)) // (g)
// (ii)
{
if (paramsPKIX.IsExplicitPolicyRequired)
{
if (acceptablePolicies.IsEmpty)
{
throw new PkixCertPathValidatorException(
"Explicit policy requested but none available.", null, certPath, index);
}
else
{
ISet _validPolicyNodeSet = new HashSet();
for (int j = 0; j < policyNodes.Length; j++)
{
IList _nodeDepth = policyNodes[j];
for (int k = 0; k < _nodeDepth.Count; k++)
{
PkixPolicyNode _node = (PkixPolicyNode)_nodeDepth[k];
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(_node.ValidPolicy))
{
foreach (object o in _node.Children)
{
_validPolicyNodeSet.Add(o);
}
}
}
}
foreach (PkixPolicyNode _node in _validPolicyNodeSet)
{
string _validPolicy = _node.ValidPolicy;
if (!acceptablePolicies.Contains(_validPolicy))
{
// TODO?
// validPolicyTree =
// removePolicyNode(validPolicyTree, policyNodes,
// _node);
}
}
if (validPolicyTree != null)
{
for (int j = (n - 1); j >= 0; j--)
{
IList nodes = policyNodes[j];
for (int k = 0; k < nodes.Count; k++)
{
PkixPolicyNode node = (PkixPolicyNode)nodes[k];
if (!node.HasChildren)
{
validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(validPolicyTree,
policyNodes, node);
}
}
}
}
}
}
intersection = validPolicyTree;
}
else
{
//
// (g) (iii)
//
// This implementation is not exactly same as the one described in
// RFC3280.
// However, as far as the validation result is concerned, both
// produce
// adequate result. The only difference is whether AnyPolicy is
// remain
// in the policy tree or not.
//
// (g) (iii) 1
//
ISet _validPolicyNodeSet = new HashSet();
for (int j = 0; j < policyNodes.Length; j++)
{
IList _nodeDepth = policyNodes[j];
for (int k = 0; k < _nodeDepth.Count; k++)
{
PkixPolicyNode _node = (PkixPolicyNode)_nodeDepth[k];
if (Rfc3280CertPathUtilities.ANY_POLICY.Equals(_node.ValidPolicy))
{
foreach (PkixPolicyNode _c_node in _node.Children)
{
if (!Rfc3280CertPathUtilities.ANY_POLICY.Equals(_c_node.ValidPolicy))
{
_validPolicyNodeSet.Add(_c_node);
}
}
}
}
}
//
// (g) (iii) 2
//
IEnumerator _vpnsIter = _validPolicyNodeSet.GetEnumerator();
while (_vpnsIter.MoveNext())
{
PkixPolicyNode _node = (PkixPolicyNode)_vpnsIter.Current;
string _validPolicy = _node.ValidPolicy;
if (!userInitialPolicySet.Contains(_validPolicy))
{
validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(validPolicyTree, policyNodes, _node);
}
}
//
// (g) (iii) 4
//
if (validPolicyTree != null)
{
for (int j = (n - 1); j >= 0; j--)
{
IList nodes = policyNodes[j];
for (int k = 0; k < nodes.Count; k++)
{
PkixPolicyNode node = (PkixPolicyNode)nodes[k];
if (!node.HasChildren)
{
validPolicyTree = PkixCertPathValidatorUtilities.RemovePolicyNode(validPolicyTree, policyNodes,
node);
}
}
}
}
intersection = validPolicyTree;
}
return intersection;
}
/**
* 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 (!BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.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 void ProcessCrlI(
DateTime validDate,
X509Crl deltacrl,
object cert,
CertStatus certStatus,
PkixParameters pkixParams)
{
if (pkixParams.IsUseDeltasEnabled && deltacrl != null)
{
PkixCertPathValidatorUtilities.GetCertStatus(validDate, deltacrl, cert, certStatus);
}
}
internal static void ProcessCrlJ(
DateTime validDate,
X509Crl completecrl,
object cert,
CertStatus certStatus)
{
if (certStatus.Status == CertStatus.Unrevoked)
{
PkixCertPathValidatorUtilities.GetCertStatus(validDate, completecrl, cert, certStatus);
}
}
internal static PkixPolicyNode ProcessCertE(
PkixCertPath certPath,
int index,
PkixPolicyNode validPolicyTree)
{
IList certs = certPath.Certificates;
X509Certificate cert = (X509Certificate)certs[index];
//
// (e)
//
Asn1Sequence certPolicies = null;
try
{
certPolicies = DerSequence.GetInstance(
PkixCertPathValidatorUtilities.GetExtensionValue(cert, X509Extensions.CertificatePolicies));
}
catch (Exception e)
{
throw new PkixCertPathValidatorException("Could not read certificate policies extension from certificate.",
e, certPath, index);
}
if (certPolicies == null)
{
validPolicyTree = null;
}
return validPolicyTree;
}
internal static readonly string[] CrlReasons = new string[]
{
"unspecified",
"keyCompromise",
"cACompromise",
"affiliationChanged",
"superseded",
"cessationOfOperation",
"certificateHold",
"unknown",
"removeFromCRL",
"privilegeWithdrawn",
"aACompromise"
};
}
}
#pragma warning restore
#endif