/**
* Gets the bytes for the PKCS7SignedData object. Optionally the authenticatedAttributes
* in the signerInfo can also be set, OR a time-stamp-authority client
* may be provided.
* @param secondDigest the digest in the authenticatedAttributes
* @param signingTime the signing time in the authenticatedAttributes
* @param tsaClient TSAClient - null or an optional time stamp authority client
* @return byte[] the bytes for the PKCS7SignedData object
* @since 2.1.6
*/
public byte[] GetEncodedPKCS7(byte[] secondDigest, DateTime signingTime, ITSAClient tsaClient, byte[] ocsp) {
if (externalDigest != null) {
digest = externalDigest;
if (RSAdata != null)
RSAdata = externalRSAdata;
}
else if (externalRSAdata != null && RSAdata != null) {
RSAdata = externalRSAdata;
sig.BlockUpdate(RSAdata, 0, RSAdata.Length);
digest = sig.GenerateSignature();
}
else {
if (RSAdata != null) {
RSAdata = new byte[messageDigest.GetDigestSize()];
messageDigest.DoFinal(RSAdata, 0);
sig.BlockUpdate(RSAdata, 0, RSAdata.Length);
}
digest = sig.GenerateSignature();
}
// Create the set of Hash algorithms
Asn1EncodableVector digestAlgorithms = new Asn1EncodableVector();
foreach (string dal in digestalgos.Keys) {
Asn1EncodableVector algos = new Asn1EncodableVector();
algos.Add(new DerObjectIdentifier(dal));
algos.Add(DerNull.Instance);
digestAlgorithms.Add(new DerSequence(algos));
}
// Create the contentInfo.
Asn1EncodableVector v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(ID_PKCS7_DATA));
if (RSAdata != null)
v.Add(new DerTaggedObject(0, new DerOctetString(RSAdata)));
DerSequence contentinfo = new DerSequence(v);
// Get all the certificates
//
v = new Asn1EncodableVector();
foreach (X509Certificate xcert in certs) {
Asn1InputStream tempstream = new Asn1InputStream(new MemoryStream(xcert.GetEncoded()));
v.Add(tempstream.ReadObject());
}
DerSet dercertificates = new DerSet(v);
// Create signerinfo structure.
//
Asn1EncodableVector signerinfo = new Asn1EncodableVector();
// Add the signerInfo version
//
signerinfo.Add(new DerInteger(signerversion));
v = new Asn1EncodableVector();
v.Add(GetIssuer(signCert.GetTbsCertificate()));
v.Add(new DerInteger(signCert.SerialNumber));
signerinfo.Add(new DerSequence(v));
// Add the digestAlgorithm
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(digestAlgorithm));
v.Add(DerNull.Instance);
signerinfo.Add(new DerSequence(v));
// add the authenticated attribute if present
if (secondDigest != null /*&& signingTime != null*/) {
signerinfo.Add(new DerTaggedObject(false, 0, GetAuthenticatedAttributeSet(secondDigest, signingTime, ocsp)));
}
// Add the digestEncryptionAlgorithm
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(digestEncryptionAlgorithm));
v.Add(DerNull.Instance);
signerinfo.Add(new DerSequence(v));
// Add the digest
signerinfo.Add(new DerOctetString(digest));
// When requested, go get and add the timestamp. May throw an exception.
// Added by Martin Brunecky, 07/12/2007 folowing Aiken Sam, 2006-11-15
// Sam found Adobe expects time-stamped SHA1-1 of the encrypted digest
if (tsaClient != null) {
byte[] tsImprint = new System.Security.Cryptography.SHA1CryptoServiceProvider().ComputeHash(digest);
byte[] tsToken = tsaClient.GetTimeStampToken(this, tsImprint);
if (tsToken != null) {
Asn1EncodableVector unauthAttributes = BuildUnauthenticatedAttributes(tsToken);
if (unauthAttributes != null) {
signerinfo.Add(new DerTaggedObject(false, 1, new DerSet(unauthAttributes)));
}
}
}
// Finally build the body out of all the components above
Asn1EncodableVector body = new Asn1EncodableVector();
body.Add(new DerInteger(version));
body.Add(new DerSet(digestAlgorithms));
body.Add(contentinfo);
body.Add(new DerTaggedObject(false, 0, dercertificates));
// if (crls.Count > 0) {
// v = new Asn1EncodableVector();
// for (Iterator i = crls.Iterator();i.HasNext();) {
// Asn1InputStream t = new Asn1InputStream(new ByteArrayInputStream((((X509CRL)i.Next()).GetEncoded())));
// v.Add(t.ReadObject());
// }
// DERSet dercrls = new DERSet(v);
// body.Add(new DERTaggedObject(false, 1, dercrls));
// }
// Only allow one signerInfo
body.Add(new DerSet(new DerSequence(signerinfo)));
// Now we have the body, wrap it in it's PKCS7Signed shell
// and return it
//
Asn1EncodableVector whole = new Asn1EncodableVector();
whole.Add(new DerObjectIdentifier(ID_PKCS7_SIGNED_DATA));
whole.Add(new DerTaggedObject(0, new DerSequence(body)));
MemoryStream bOut = new MemoryStream();
Asn1OutputStream dout = new Asn1OutputStream(bOut);
dout.WriteObject(new DerSequence(whole));
dout.Close();
return bOut.ToArray();
}
/**
* generate a signed object that for a CMS Signed Data
* object using the given provider - if encapsulate is true a copy
* of the message will be included in the signature. The content type
* is set according to the OID represented by the string signedContentType.
* @param out stream the CMS object is to be written to.
* @param signedContentType OID for data to be signed.
* @param encapsulate true if data should be encapsulated.
* @param dataOutputStream output stream to copy the data being signed to.
*/
public Stream Open(
Stream outStream,
string signedContentType,
bool encapsulate,
Stream dataOutputStream)
{
if (outStream == null)
throw new ArgumentNullException("outStream");
if (!outStream.CanWrite)
throw new ArgumentException("Expected writeable stream", "outStream");
if (dataOutputStream != null && !dataOutputStream.CanWrite)
throw new ArgumentException("Expected writeable stream", "dataOutputStream");
_messageDigestsLocked = true;
//
// ContentInfo
//
BerSequenceGenerator sGen = new BerSequenceGenerator(outStream);
sGen.AddObject(CmsObjectIdentifiers.SignedData);
//
// Signed Data
//
BerSequenceGenerator sigGen = new BerSequenceGenerator(
sGen.GetRawOutputStream(), 0, true);
sigGen.AddObject(CalculateVersion(signedContentType));
Asn1EncodableVector digestAlgs = new Asn1EncodableVector();
foreach (string digestOid in _messageDigestOids)
{
digestAlgs.Add(
new AlgorithmIdentifier(new DerObjectIdentifier(digestOid), DerNull.Instance));
}
{
byte[] tmp = new DerSet(digestAlgs).GetEncoded();
sigGen.GetRawOutputStream().Write(tmp, 0, tmp.Length);
}
BerSequenceGenerator eiGen = new BerSequenceGenerator(sigGen.GetRawOutputStream());
eiGen.AddObject(new DerObjectIdentifier(signedContentType));
// If encapsulating, add the data as an octet string in the sequence
Stream encapStream = encapsulate
? CmsUtilities.CreateBerOctetOutputStream(eiGen.GetRawOutputStream(), 0, true, _bufferSize)
: null;
// Also send the data to 'dataOutputStream' if necessary
Stream teeStream = GetSafeTeeOutputStream(dataOutputStream, encapStream);
// Let all the digests see the data as it is written
Stream digStream = AttachDigestsToOutputStream(_messageDigests.Values, teeStream);
return new CmsSignedDataOutputStream(this, digStream, signedContentType, sGen, sigGen, eiGen);
}
/**
* generate a signed object that for a CMS Signed Data
* object using the given provider - if encapsulate is true a copy
* of the message will be included in the signature. The content type
* is set according to the OID represented by the string signedContentType.
* @param out stream the CMS object is to be written to.
* @param signedContentType OID for data to be signed.
* @param encapsulate true if data should be encapsulated.
* @param dataOutputStream output stream to copy the data being signed to.
*/
public Stream Open(
Stream outStream,
string signedContentType,
bool encapsulate,
Stream dataOutputStream)
{
if (outStream == null)
throw new ArgumentNullException("outStream");
if (!outStream.CanWrite)
throw new ArgumentException("Expected writeable stream", "outStream");
if (dataOutputStream != null && !dataOutputStream.CanWrite)
throw new ArgumentException("Expected writeable stream", "dataOutputStream");
_messageDigestsLocked = true;
//
// ContentInfo
//
BerSequenceGenerator sGen = new BerSequenceGenerator(outStream);
sGen.AddObject(CmsObjectIdentifiers.SignedData);
//
// Signed Data
//
BerSequenceGenerator sigGen = new BerSequenceGenerator(
sGen.GetRawOutputStream(), 0, true);
sigGen.AddObject(CalculateVersion(signedContentType));
Asn1EncodableVector digestAlgs = new Asn1EncodableVector();
foreach (string digestOid in _messageDigestOids)
{
digestAlgs.Add(
new AlgorithmIdentifier(new DerObjectIdentifier(digestOid), DerNull.Instance));
}
{
byte[] tmp = new DerSet(digestAlgs).GetEncoded();
sigGen.GetRawOutputStream().Write(tmp, 0, tmp.Length);
}
BerSequenceGenerator eiGen = new BerSequenceGenerator(sigGen.GetRawOutputStream());
eiGen.AddObject(new DerObjectIdentifier(signedContentType));
Stream digStream;
if (encapsulate)
{
BerOctetStringGenerator octGen = new BerOctetStringGenerator(
eiGen.GetRawOutputStream(), 0, true);
digStream = octGen.GetOctetOutputStream(_bufferSize);
if (dataOutputStream != null)
{
digStream = new TeeOutputStream(dataOutputStream, digStream);
}
}
else
{
if (dataOutputStream != null)
{
digStream = dataOutputStream;
}
else
{
digStream = new NullOutputStream();
}
}
foreach (IDigest d in _messageDigests.Values)
{
digStream = new DigestStream(digStream, null, d);
}
return new CmsSignedDataOutputStream(this, digStream, signedContentType, sGen, sigGen, eiGen);
}
internal virtual DerSet CreateDerSet(
DefiniteLengthInputStream dIn)
{
return(DerSet.FromVector(BuildDerEncodableVector(dIn), false));
}
private Asn1Object CreateDERForRecipient(byte[] inp, X509Certificate cert) {
String s = "1.2.840.113549.3.2";
byte[] outp = new byte[100];
DerObjectIdentifier derob = new DerObjectIdentifier(s);
byte[] keyp = IVGenerator.GetIV(16);
IBufferedCipher cf = CipherUtilities.GetCipher(derob);
KeyParameter kp = new KeyParameter(keyp);
byte[] iv = IVGenerator.GetIV(cf.GetBlockSize());
ParametersWithIV piv = new ParametersWithIV(kp, iv);
cf.Init(true, piv);
int len = cf.DoFinal(inp, outp, 0);
byte[] abyte1 = new byte[len];
System.Array.Copy(outp, 0, abyte1, 0, len);
DerOctetString deroctetstring = new DerOctetString(abyte1);
KeyTransRecipientInfo keytransrecipientinfo = ComputeRecipientInfo(cert, keyp);
DerSet derset = new DerSet(new RecipientInfo(keytransrecipientinfo));
Asn1EncodableVector ev = new Asn1EncodableVector();
ev.Add(new DerInteger(58));
ev.Add(new DerOctetString(iv));
DerSequence seq = new DerSequence(ev);
AlgorithmIdentifier algorithmidentifier = new AlgorithmIdentifier(derob, seq);
EncryptedContentInfo encryptedcontentinfo =
new EncryptedContentInfo(PkcsObjectIdentifiers.Data, algorithmidentifier, deroctetstring);
Asn1Set set = null;
EnvelopedData env = new EnvelopedData(null, derset, encryptedcontentinfo, set);
Org.BouncyCastle.Asn1.Cms.ContentInfo contentinfo =
new Org.BouncyCastle.Asn1.Cms.ContentInfo(PkcsObjectIdentifiers.EnvelopedData, env);
return contentinfo.ToAsn1Object();
}
/**
* Replace the signerinformation store associated with this
* CmsSignedData object with the new one passed in. You would
* probably only want to do this if you wanted to change the unsigned
* attributes associated with a signer, or perhaps delete one.
*
* @param signedData the signed data object to be used as a base.
* @param signerInformationStore the new signer information store to use.
* @return a new signed data object.
*/
public static CmsSignedData ReplaceSigners(
CmsSignedData signedData,
SignerInformationStore signerInformationStore)
{
//
// copy
//
CmsSignedData cms = new CmsSignedData(signedData);
//
// replace the store
//
cms.signerInfoStore = signerInformationStore;
//
// replace the signers in the SignedData object
//
Asn1EncodableVector digestAlgs = new Asn1EncodableVector();
Asn1EncodableVector vec = new Asn1EncodableVector();
foreach (SignerInformation signer in signerInformationStore.GetSigners())
{
digestAlgs.Add(Helper.FixAlgID(signer.DigestAlgorithmID));
vec.Add(signer.ToSignerInfo());
}
Asn1Set digests = new DerSet(digestAlgs);
Asn1Set signers = new DerSet(vec);
Asn1Sequence sD = (Asn1Sequence)signedData.signedData.ToAsn1Object();
//
// signers are the last item in the sequence.
//
vec = new Asn1EncodableVector(
sD[0], // version
digests);
for (int i = 2; i != sD.Count - 1; i++)
{
vec.Add(sD[i]);
}
vec.Add(signers);
cms.signedData = SignedData.GetInstance(new BerSequence(vec));
//
// replace the contentInfo with the new one
//
cms.contentInfo = new ContentInfo(cms.contentInfo.ContentType, cms.signedData);
return cms;
}
/**
* Return a signer information object with the passed in unsigned
* attributes replacing the ones that are current associated with
* the object passed in.
*
* @param signerInformation the signerInfo to be used as the basis.
* @param unsignedAttributes the unsigned attributes to add.
* @return a copy of the original SignerInformationObject with the changed attributes.
*/
public static SignerInformation ReplaceUnsignedAttributes(
SignerInformation signerInformation,
Asn1.Cms.AttributeTable unsignedAttributes)
{
SignerInfo sInfo = signerInformation.info;
Asn1Set unsignedAttr = null;
if (unsignedAttributes != null)
{
unsignedAttr = new DerSet(unsignedAttributes.ToAsn1EncodableVector());
}
return new SignerInformation(
new SignerInfo(
sInfo.SignerID,
sInfo.DigestAlgorithm,
sInfo.AuthenticatedAttributes,
sInfo.DigestEncryptionAlgorithm,
sInfo.EncryptedDigest,
unsignedAttr),
signerInformation.contentType,
signerInformation.content,
null);
}
/**
* generate a signed object that for a CMS Signed Data
* object - if encapsulate is true a copy
* of the message will be included in the signature. The content type
* is set according to the OID represented by the string signedContentType.
*/
public Stream Open(
Stream outStream,
string signedContentType,
bool encapsulate)
{
//
// ContentInfo
//
BerSequenceGenerator sGen = new BerSequenceGenerator(outStream);
sGen.AddObject(CmsObjectIdentifiers.SignedData);
//
// Signed Data
//
BerSequenceGenerator sigGen = new BerSequenceGenerator(
sGen.GetRawOutputStream(), 0, true);
sigGen.AddObject(CalculateVersion(signedContentType));
Asn1EncodableVector digestAlgs = new Asn1EncodableVector();
//
// add the precalculated SignerInfo digest algorithms.
//
foreach (SignerInformation signer in _signers)
{
digestAlgs.Add(FixAlgID(signer.DigestAlgorithmID));
}
//
// add the new digests
//
foreach (SignerInf signer in _signerInfs)
{
digestAlgs.Add(FixAlgID(signer.DigestAlgorithmID));
}
{
byte[] tmp = new DerSet(digestAlgs).GetEncoded();
sigGen.GetRawOutputStream().Write(tmp, 0, tmp.Length);
}
BerSequenceGenerator eiGen = new BerSequenceGenerator(sigGen.GetRawOutputStream());
eiGen.AddObject(new DerObjectIdentifier(signedContentType));
Stream digStream;
if (encapsulate)
{
BerOctetStringGenerator octGen = new BerOctetStringGenerator(
eiGen.GetRawOutputStream(), 0, true);
if (_bufferSize != 0)
{
digStream = octGen.GetOctetOutputStream(new byte[_bufferSize]);
}
else
{
digStream = octGen.GetOctetOutputStream();
}
}
else
{
digStream = new NullOutputStream();
}
foreach (IDigest d in _messageDigests)
{
digStream = new DigestStream(digStream, null, d);
}
return new CmsSignedDataOutputStream(this, digStream, signedContentType, sGen, sigGen, eiGen);
}
internal virtual DerSet CreateDerSet(
DefiniteLengthInputStream dIn)
{
return(DerSet.FromVector(ReadVector(dIn), false));
}
internal virtual DerSet CreateDerSet(DefiniteLengthInputStream dIn) => DerSet.FromVector(this.BuildDerEncodableVector(dIn), false);
/// <summary>
/// Generates PKCS#7 signature of specified data
/// </summary>
/// <param name="data">Data to be signed</param>
/// <param name="detached">Flag indicating whether detached signature should be produced</param>
/// <param name="signingCertificate">Signing certificate</param>
/// <param name="certPath">Certification path for signing certificate</param>
/// <returns>DER encoded PKCS#7 signature of specified data</returns>
public byte[] GenerateSignature(byte[] data, bool detached, BCX509.X509Certificate signingCertificate, ICollection<BCX509.X509Certificate> certPath)
{
if (this._disposed)
throw new ObjectDisposedException(this.GetType().FullName);
string hashOid = GetHashOid(_hashAlgorihtm);
IDigest hashGenerator = GetHashGenerator(_hashAlgorihtm);
// Compute hash of input data
byte[] dataHash = ComputeDigest(hashGenerator, data);
// Construct SignerInfo.signedAttrs
Asn1EncodableVector signedAttributesVector = new Asn1EncodableVector();
// Add PKCS#9 contentType signed attribute
signedAttributesVector.Add(
new Org.BouncyCastle.Asn1.Cms.Attribute(
new DerObjectIdentifier(OID.PKCS9AtContentType),
new DerSet(new DerObjectIdentifier(OID.PKCS7IdData))));
// Add PKCS#9 messageDigest signed attribute
signedAttributesVector.Add(
new Org.BouncyCastle.Asn1.Cms.Attribute(
new DerObjectIdentifier(OID.PKCS9AtMessageDigest),
new DerSet(new DerOctetString(dataHash))));
// Add PKCS#9 signingTime signed attribute
signedAttributesVector.Add(
new Org.BouncyCastle.Asn1.Cms.Attribute(
new DerObjectIdentifier(OID.PKCS9AtSigningTime),
new DerSet(new Org.BouncyCastle.Asn1.Cms.Time(new DerUtcTime(DateTime.UtcNow)))));
DerSet signedAttributes = new DerSet(signedAttributesVector);
// Sign SignerInfo.signedAttrs with PKCS#1 v1.5 RSA signature using private key stored on PKCS#11 compatible device
byte[] pkcs1Digest = ComputeDigest(hashGenerator, signedAttributes.GetDerEncoded());
byte[] pkcs1DigestInfo = CreateDigestInfo(pkcs1Digest, hashOid);
byte[] pkcs1Signature = null;
using (Session session = _slot.OpenSession(true))
using (Mechanism mechanism = new Mechanism(CKM.CKM_RSA_PKCS))
pkcs1Signature = session.Sign(mechanism, _privateKeyHandle, pkcs1DigestInfo);
// Construct SignerInfo
SignerInfo signerInfo = new SignerInfo(
new SignerIdentifier(new IssuerAndSerialNumber(signingCertificate.IssuerDN, signingCertificate.SerialNumber)),
new AlgorithmIdentifier(new DerObjectIdentifier(hashOid), null),
signedAttributes,
new AlgorithmIdentifier(new DerObjectIdentifier(OID.PKCS1RsaEncryption), null),
new DerOctetString(pkcs1Signature),
null);
// Construct SignedData.digestAlgorithms
Asn1EncodableVector digestAlgorithmsVector = new Asn1EncodableVector();
digestAlgorithmsVector.Add(new AlgorithmIdentifier(new DerObjectIdentifier(hashOid), null));
// Construct SignedData.encapContentInfo
ContentInfo encapContentInfo = new ContentInfo(
new DerObjectIdentifier(OID.PKCS7IdData),
(detached) ? null : new DerOctetString(data));
// Construct SignedData.certificates
Asn1EncodableVector certificatesVector = new Asn1EncodableVector();
foreach (BCX509.X509Certificate cert in certPath)
certificatesVector.Add(X509CertificateStructure.GetInstance(Asn1Object.FromByteArray(cert.GetEncoded())));
// Construct SignedData.signerInfos
Asn1EncodableVector signerInfosVector = new Asn1EncodableVector();
signerInfosVector.Add(signerInfo.ToAsn1Object());
// Construct SignedData
SignedData signedData = new SignedData(
new DerSet(digestAlgorithmsVector),
encapContentInfo,
new BerSet(certificatesVector),
null,
new DerSet(signerInfosVector));
// Construct top level ContentInfo
ContentInfo contentInfo = new ContentInfo(
new DerObjectIdentifier(OID.PKCS7IdSignedData),
signedData);
return contentInfo.GetDerEncoded();
}
/**
* Gets the bytes for the PKCS7SignedData object. Optionally the authenticatedAttributes
* in the signerInfo can also be set. If either of the parameters is <CODE>null</CODE>, none will be used.
* @param secondDigest the digest in the authenticatedAttributes
* @param signingTime the signing time in the authenticatedAttributes
* @return the bytes for the PKCS7SignedData object
*/
public byte[] GetEncodedPKCS7(byte[] secondDigest, DateTime signingTime)
{
if (externalDigest != null) {
digest = externalDigest;
if (RSAdata != null)
RSAdata = externalRSAdata;
}
else if (externalRSAdata != null && RSAdata != null) {
RSAdata = externalRSAdata;
sig.BlockUpdate(RSAdata, 0, RSAdata.Length);
digest = sig.GenerateSignature();
}
else {
if (RSAdata != null) {
RSAdata = new byte[messageDigest.GetDigestSize()];
messageDigest.DoFinal(RSAdata, 0);
sig.BlockUpdate(RSAdata, 0, RSAdata.Length);
}
digest = sig.GenerateSignature();
}
// Create the set of Hash algorithms
Asn1EncodableVector digestAlgorithms = new Asn1EncodableVector();
foreach (string dal in digestalgos.Keys) {
Asn1EncodableVector algos = new Asn1EncodableVector();
algos.Add(new DerObjectIdentifier(dal));
algos.Add(DerNull.Instance);
digestAlgorithms.Add(new DerSequence(algos));
}
// Create the contentInfo.
Asn1EncodableVector v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(ID_PKCS7_DATA));
if (RSAdata != null)
v.Add(new DerTaggedObject(0, new DerOctetString(RSAdata)));
DerSequence contentinfo = new DerSequence(v);
// Get all the certificates
//
v = new Asn1EncodableVector();
foreach (X509Certificate xcert in certs) {
Asn1InputStream tempstream = new Asn1InputStream(new MemoryStream(xcert.GetEncoded()));
v.Add(tempstream.ReadObject());
}
DerSet dercertificates = new DerSet(v);
// Create signerinfo structure.
//
Asn1EncodableVector signerinfo = new Asn1EncodableVector();
// Add the signerInfo version
//
signerinfo.Add(new DerInteger(signerversion));
v = new Asn1EncodableVector();
v.Add(GetIssuer(signCert.GetTbsCertificate()));
v.Add(new DerInteger(signCert.SerialNumber));
signerinfo.Add(new DerSequence(v));
// Add the digestAlgorithm
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(digestAlgorithm));
v.Add(DerNull.Instance);
signerinfo.Add(new DerSequence(v));
// add the authenticated attribute if present
if (secondDigest != null /*&& signingTime != null*/) {
Asn1EncodableVector attribute = new Asn1EncodableVector();
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(ID_CONTENT_TYPE));
v.Add(new DerSet(new DerObjectIdentifier(ID_PKCS7_DATA)));
attribute.Add(new DerSequence(v));
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(ID_SIGNING_TIME));
v.Add(new DerSet(new DerUtcTime(signingTime)));
attribute.Add(new DerSequence(v));
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(ID_MESSAGE_DIGEST));
v.Add(new DerSet(new DerOctetString(secondDigest)));
attribute.Add(new DerSequence(v));
signerinfo.Add(new DerTaggedObject(false, 0, new DerSet(attribute)));
}
// Add the digestEncryptionAlgorithm
v = new Asn1EncodableVector();
v.Add(new DerObjectIdentifier(digestEncryptionAlgorithm));
v.Add(DerNull.Instance);
signerinfo.Add(new DerSequence(v));
// Add the digest
signerinfo.Add(new DerOctetString(digest));
// Finally build the body out of all the components above
Asn1EncodableVector body = new Asn1EncodableVector();
body.Add(new DerInteger(version));
body.Add(new DerSet(digestAlgorithms));
body.Add(contentinfo);
body.Add(new DerTaggedObject(false, 0, dercertificates));
// if (crls.Count > 0) {
// v = new Asn1EncodableVector();
// for (Iterator i = crls.Iterator();i.HasNext();) {
// Asn1InputStream t = new Asn1InputStream(new ByteArrayInputStream((((X509CRL)i.Next()).GetEncoded())));
// v.Add(t.ReadObject());
// }
// DERSet dercrls = new DERSet(v);
// body.Add(new DERTaggedObject(false, 1, dercrls));
// }
// Only allow one signerInfo
body.Add(new DerSet(new DerSequence(signerinfo)));
// Now we have the body, wrap it in it's PKCS7Signed shell
// and return it
//
Asn1EncodableVector whole = new Asn1EncodableVector();
whole.Add(new DerObjectIdentifier(ID_PKCS7_SIGNED_DATA));
whole.Add(new DerTaggedObject(0, new DerSequence(body)));
MemoryStream bOut = new MemoryStream();
Asn1OutputStream dout = new Asn1OutputStream(bOut);
dout.WriteObject(new DerSequence(whole));
dout.Close();
return bOut.ToArray();
}