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package org.spongycastle.cert;
import java.io.IOException;
import java.io.OutputStream;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.spongycastle.asn1.ASN1Encodable;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1GeneralizedTime;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.DERBitString;
import org.spongycastle.asn1.DERNull;
import org.spongycastle.asn1.DEROutputStream;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
import org.spongycastle.asn1.x509.AttributeCertificate;
import org.spongycastle.asn1.x509.AttributeCertificateInfo;
import org.spongycastle.asn1.x509.Certificate;
import org.spongycastle.asn1.x509.CertificateList;
import org.spongycastle.asn1.x509.Extensions;
import org.spongycastle.asn1.x509.ExtensionsGenerator;
import org.spongycastle.asn1.x509.TBSCertList;
import org.spongycastle.asn1.x509.TBSCertificate;
import org.spongycastle.operator.ContentSigner;
class CertUtils
{
private static Set EMPTY_SET = Collections.unmodifiableSet(new HashSet());
private static List EMPTY_LIST = Collections.unmodifiableList(new ArrayList());
static X509CertificateHolder generateFullCert(ContentSigner signer, TBSCertificate tbsCert)
{
try
{
return new X509CertificateHolder(generateStructure(tbsCert, signer.getAlgorithmIdentifier(), generateSig(signer, tbsCert)));
}
catch (IOException e)
{
throw new IllegalStateException("cannot produce certificate signature");
}
}
static X509AttributeCertificateHolder generateFullAttrCert(ContentSigner signer, AttributeCertificateInfo attrInfo)
{
try
{
return new X509AttributeCertificateHolder(generateAttrStructure(attrInfo, signer.getAlgorithmIdentifier(), generateSig(signer, attrInfo)));
}
catch (IOException e)
{
throw new IllegalStateException("cannot produce attribute certificate signature");
}
}
static X509CRLHolder generateFullCRL(ContentSigner signer, TBSCertList tbsCertList)
{
try
{
return new X509CRLHolder(generateCRLStructure(tbsCertList, signer.getAlgorithmIdentifier(), generateSig(signer, tbsCertList)));
}
catch (IOException e)
{
throw new IllegalStateException("cannot produce certificate signature");
}
}
private static byte[] generateSig(ContentSigner signer, ASN1Encodable tbsObj)
throws IOException
{
OutputStream sOut = signer.getOutputStream();
DEROutputStream dOut = new DEROutputStream(sOut);
dOut.writeObject(tbsObj);
sOut.close();
return signer.getSignature();
}
private static Certificate generateStructure(TBSCertificate tbsCert, AlgorithmIdentifier sigAlgId, byte[] signature)
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(tbsCert);
v.add(sigAlgId);
v.add(new DERBitString(signature));
return Certificate.getInstance(new DERSequence(v));
}
private static AttributeCertificate generateAttrStructure(AttributeCertificateInfo attrInfo, AlgorithmIdentifier sigAlgId, byte[] signature)
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(attrInfo);
v.add(sigAlgId);
v.add(new DERBitString(signature));
return AttributeCertificate.getInstance(new DERSequence(v));
}
private static CertificateList generateCRLStructure(TBSCertList tbsCertList, AlgorithmIdentifier sigAlgId, byte[] signature)
{
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(tbsCertList);
v.add(sigAlgId);
v.add(new DERBitString(signature));
return CertificateList.getInstance(new DERSequence(v));
}
static Set getCriticalExtensionOIDs(Extensions extensions)
{
if (extensions == null)
{
return EMPTY_SET;
}
return Collections.unmodifiableSet(new HashSet(Arrays.asList(extensions.getCriticalExtensionOIDs())));
}
static Set getNonCriticalExtensionOIDs(Extensions extensions)
{
if (extensions == null)
{
return EMPTY_SET;
}
// TODO: should probably produce a set that imposes correct ordering
return Collections.unmodifiableSet(new HashSet(Arrays.asList(extensions.getNonCriticalExtensionOIDs())));
}
static List getExtensionOIDs(Extensions extensions)
{
if (extensions == null)
{
return EMPTY_LIST;
}
return Collections.unmodifiableList(Arrays.asList(extensions.getExtensionOIDs()));
}
static void addExtension(ExtensionsGenerator extGenerator, ASN1ObjectIdentifier oid, boolean isCritical, ASN1Encodable value)
throws CertIOException
{
try
{
extGenerator.addExtension(oid, isCritical, value);
}
catch (IOException e)
{
throw new CertIOException("cannot encode extension: " + e.getMessage(), e);
}
}
static DERBitString booleanToBitString(boolean[] id)
{
byte[] bytes = new byte[(id.length + 7) / 8];
for (int i = 0; i != id.length; i++)
{
bytes[i / 8] |= (id[i]) ? (1 << ((7 - (i % 8)))) : 0;
}
int pad = id.length % 8;
if (pad == 0)
{
return new DERBitString(bytes);
}
else
{
return new DERBitString(bytes, 8 - pad);
}
}
static boolean[] bitStringToBoolean(DERBitString bitString)
{
if (bitString != null)
{
byte[] bytes = bitString.getBytes();
boolean[] boolId = new boolean[bytes.length * 8 - bitString.getPadBits()];
for (int i = 0; i != boolId.length; i++)
{
boolId[i] = (bytes[i / 8] & (0x80 >>> (i % 8))) != 0;
}
return boolId;
}
return null;
}
static Date recoverDate(ASN1GeneralizedTime time)
{
try
{
return time.getDate();
}
catch (ParseException e)
{
throw new IllegalStateException("unable to recover date: " + e.getMessage());
}
}
static boolean isAlgIdEqual(AlgorithmIdentifier id1, AlgorithmIdentifier id2)
{
if (!id1.getAlgorithm().equals(id2.getAlgorithm()))
{
return false;
}
if (id1.getParameters() == null)
{
if (id2.getParameters() != null && !id2.getParameters().equals(DERNull.INSTANCE))
{
return false;
}
return true;
}
if (id2.getParameters() == null)
{
if (id1.getParameters() != null && !id1.getParameters().equals(DERNull.INSTANCE))
{
return false;
}
return true;
}
return id1.getParameters().equals(id2.getParameters());
}
}
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