Exemple #1
0
        private EncryptedValue EncryptData(byte[] data)
        {
            MemoryOutputStream bOut = new MemoryOutputStream();
            Stream             eOut = encryptor.BuildCipher(bOut).Stream;

            try
            {
                eOut.Write(data, 0, data.Length);
                BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.Dispose(eOut);
            }
            catch (IOException e)
            {
                throw new CrmfException("cannot process data: " + e.Message, e);
            }

            AlgorithmIdentifier intendedAlg = null;
            AlgorithmIdentifier symmAlg     = (AlgorithmIdentifier)encryptor.AlgorithmDetails;

            DerBitString encSymmKey;

            try
            {
                encSymmKey = new DerBitString(wrapper.Wrap(((KeyParameter)encryptor.Key).GetKey()).Collect());
            }
            catch (Exception e)
            {
                throw new CrmfException("cannot wrap key: " + e.Message, e);
            }

            AlgorithmIdentifier keyAlg    = (AlgorithmIdentifier)wrapper.AlgorithmDetails;
            Asn1OctetString     valueHint = null;
            DerBitString        encValue  = new DerBitString(bOut.ToArray());

            return(new EncryptedValue(intendedAlg, symmAlg, encSymmKey, keyAlg, valueHint, encValue));
        }
Exemple #2
0
        public static MetadataJavaField ToMetadata(this JavaField field)
        {
            var javaField = new MetadataJavaField
            {
                Name = field.Name,
                Type = field.Type.GetSignature()
            };

            if (field.ConstantValue != null)
            {
                using var stream = new MemoryStream();
                using var ms     = new MemoryOutputStream(stream);
                using var dos    = new DataOutputStream(ms);

                field.ConstantValue.Dump(dos);

                //Write the original string there to be able to create a new constantpool from metadata
                if (field.ConstantValue is ConstantString constantString)
                {
                    dos.WriteUTF(constantString.GetBytes(field.ConstantPool));
                }

                javaField.ConstantValue = stream.ToArray();
            }

            return(javaField);
        }
        public byte[] GetEncoded()
        {
            MemoryOutputStream bOut = new MemoryOutputStream();

            this.Encode(bOut);

            return(bOut.ToArray());
        }
        private CmsEnvelopedData doGenerate(
            ICmsTypedData content,
            ICipherBuilderWithKey<AlgorithmIdentifier> contentEncryptor)
        {
            Asn1EncodableVector recipientInfos = new Asn1EncodableVector();
            AlgorithmIdentifier encAlgId;
            Asn1OctetString encContent;

            MemoryOutputStream bOut = new MemoryOutputStream();

            try
            {
                ICipher cOut = contentEncryptor.BuildCipher(bOut);

                content.Write(cOut.Stream);

                cOut.Stream.Close();
            }
            catch (IOException e)
            {
                throw new CmsException(e.Message, e);
            }

            byte[] encryptedContent = bOut.ToArray();

            encAlgId = contentEncryptor.AlgorithmDetails;

            encContent = new BerOctetString(encryptedContent);

            ISymmetricKey encKey = contentEncryptor.Key;

            for (IEnumerator<IRecipientInfoGenerator> it = recipientInfoGenerators.GetEnumerator(); it.MoveNext();)
            {
                IRecipientInfoGenerator recipient = (IRecipientInfoGenerator)it.Current;

                recipientInfos.Add(recipient.Generate(encKey));
            }

            EncryptedContentInfo eci = new EncryptedContentInfo(
                            content.ContentType,
                            encAlgId,
                            encContent);

            Asn1Set unprotectedAttrSet = null;
            if (unprotectedAttributeGenerator != null)
            {
                Asn1.Cms.AttributeTable attrTable = unprotectedAttributeGenerator.GetAttributes(new Dictionary<string, object>());

                unprotectedAttrSet = new BerSet(attrTable.ToAsn1EncodableVector());
            }

            ContentInfo contentInfo = new ContentInfo(
                    CmsObjectIdentifiers.EnvelopedData,
                    new EnvelopedData(originatorInfo, new DerSet(recipientInfos), eci, unprotectedAttrSet));

            return new CmsEnvelopedData(contentInfo);
        }
Exemple #5
0
            public IBlockResult Wrap(byte[] keyData)
            {
                MemoryOutputStream mOut = new MemoryOutputStream();

                ICipher keyCipher = cipherBuilder.BuildCipher(mOut);

                keyCipher.Stream.Write(keyData, 0, keyData.Length);

                keyCipher.Stream.Close();

                return(new SimpleBlockResult(mOut.ToArray()));
            }
            public IBlockResult Unwrap(byte[] cipherText, int offset, int length)
            {
                MemoryOutputStream mOut = new MemoryOutputStream();

                ICipher keyCipher = cipherBuilder.BuildCipher(mOut);

                keyCipher.Stream.Write(cipherText, offset, length);

                keyCipher.Stream.Close();

                return(new SimpleBlockResult(mOut.ToArray()));
            }
Exemple #7
0
        public async Task FileWriteStreamRandomSeekTestAsync()
        {
            byte[] buffer = GetRandomBuffer(3 * 1024 * 1024);

            CloudFileShare share = GetRandomShareReference();

            share.ServiceClient.DefaultRequestOptions.ParallelOperationThreadCount = 2;
            try
            {
                await share.CreateAsync();

                CloudFile file = share.GetRootDirectoryReference().GetFileReference("file1");
                using (MemoryStream wholeFile = new MemoryStream())
                {
                    using (var writeStream = await file.OpenWriteAsync(buffer.Length))
                    {
                        Stream fileStream = writeStream;
                        await fileStream.WriteAsync(buffer, 0, buffer.Length);

                        await wholeFile.WriteAsync(buffer, 0, buffer.Length);

                        Random random = new Random();
                        for (int i = 0; i < 10; i++)
                        {
                            int offset = random.Next(buffer.Length);
                            TestHelper.SeekRandomly(fileStream, offset);
                            await fileStream.WriteAsync(buffer, 0, buffer.Length - offset);

                            wholeFile.Seek(offset, SeekOrigin.Begin);
                            await wholeFile.WriteAsync(buffer, 0, buffer.Length - offset);
                        }
                    }

                    wholeFile.Seek(0, SeekOrigin.End);
                    await file.FetchAttributesAsync();

                    Assert.IsNull(file.Properties.ContentMD5);

                    using (MemoryOutputStream downloadedFile = new MemoryOutputStream())
                    {
                        await file.DownloadToStreamAsync(downloadedFile);

                        TestHelper.AssertStreamsAreEqual(wholeFile, downloadedFile.UnderlyingStream);
                    }
                }
            }
            finally
            {
                share.DeleteIfExistsAsync().Wait();
            }
        }
Exemple #8
0
        public void WriteByte_ByteIsWritten()
        {
            // Arrange
            var           result             = new byte[1];
            IOutputStream memoryOutputStream = new MemoryOutputStream(result);
            var           expectedData       = new byte[] { 1 };

            // Act
            memoryOutputStream.WriteByte(1);
            memoryOutputStream.Dispose();

            // Assert
            Assert.True(result.SequenceEqual(expectedData));
        }
Exemple #9
0
        public void WriteBlock_WriteAllFromArray_AllDataIsWritten()
        {
            // Arrange
            var           result             = new byte[3];
            IOutputStream memoryOutputStream = new MemoryOutputStream(result);
            var           data = new byte[] { 1, 2, 3 };

            // Act
            memoryOutputStream.WriteBlock(data, size: ( uint )data.Length);
            memoryOutputStream.Dispose();

            // Assert
            Assert.True(result.SequenceEqual(data));
        }
Exemple #10
0
        public void WriteBlock_WriteFirstByteFromArray_WrittenOnlyOneByte()
        {
            // Arrange
            var           result             = new byte[1];
            IOutputStream memoryOutputStream = new MemoryOutputStream(result);
            var           expectedData       = new byte[] { 1 };

            // Act
            memoryOutputStream.WriteBlock(new byte[] { 1, 2 }, size: 1);
            memoryOutputStream.Dispose();

            // Assert
            Assert.True(result.SequenceEqual(expectedData));
        }
        private CmsEncryptedData doGenerate(
            ICmsTypedData content,
            ICipherBuilder <AlgorithmIdentifier> contentEncryptor)
        {
            AlgorithmIdentifier encAlgId;
            Asn1OctetString     encContent;

            MemoryOutputStream bOut = new MemoryOutputStream();

            try
            {
                ICipher cipher = contentEncryptor.BuildCipher(bOut);

                content.Write(cipher.Stream);

                cipher.Stream.Close();
            }
            catch (IOException)
            {
                throw new CmsException("");
            }

            byte[] encryptedContent = bOut.ToArray();

            encAlgId = contentEncryptor.AlgorithmDetails;

            encContent = new BerOctetString(encryptedContent);

            EncryptedContentInfo eci = new EncryptedContentInfo(
                content.ContentType,
                encAlgId,
                encContent);

            Asn1Set unprotectedAttrSet = null;

            if (unprotectedAttributeGenerator != null)
            {
                Asn1.Cms.AttributeTable attrTable = unprotectedAttributeGenerator.GetAttributes(new Dictionary <string, object>());

                unprotectedAttrSet = new BerSet(attrTable.ToAsn1EncodableVector());
            }

            ContentInfo contentInfo = new ContentInfo(
                CmsObjectIdentifiers.EncryptedData,
                new EncryptedData(eci, unprotectedAttrSet));

            return(new CmsEncryptedData(contentInfo));
        }
        /// <summary>
        /// Create the encrypted private key info using the passed in encryptor.
        /// </summary>
        /// <param name="encryptor">The encryptor to use.</param>
        /// <returns>An encrypted private key info containing the original private key info.</returns>
        public Pkcs8EncryptedPrivateKeyInfo Build(
            ICipherBuilder encryptor)
        {
            try
            {
                MemoryStream bOut    = new MemoryOutputStream();
                ICipher      cOut    = encryptor.BuildCipher(bOut);
                byte[]       keyData = privateKeyInfo.GetEncoded();

                Stream str = cOut.Stream;
                str.Write(keyData, 0, keyData.Length);
                BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.Dispose(str);

                return(new Pkcs8EncryptedPrivateKeyInfo(new EncryptedPrivateKeyInfo((AlgorithmIdentifier)encryptor.AlgorithmDetails, bOut.ToArray())));
            }
            catch (IOException)
            {
                throw new InvalidOperationException("cannot encode privateKeyInfo");
            }
        }
        /// <summary>
        /// Create the encrypted private key info using the passed in encryptor.
        /// </summary>
        /// <param name="encryptor">The encryptor to use.</param>
        /// <returns>An encrypted private key info containing the original private key info.</returns>
        public Pkcs8EncryptedPrivateKeyInfo Build(
            ICipherBuilder encryptor)
        {
            try
            {
                MemoryStream bOut    = new MemoryOutputStream();
                ICipher      cOut    = encryptor.BuildCipher(bOut);
                byte[]       keyData = privateKeyInfo.GetEncoded();

                using (var str = cOut.Stream)
                {
                    str.Write(keyData, 0, keyData.Length);
                }

                return(new Pkcs8EncryptedPrivateKeyInfo(new EncryptedPrivateKeyInfo((AlgorithmIdentifier)encryptor.AlgorithmDetails, bOut.ToArray())));
            }
            catch (IOException)
            {
                throw new InvalidOperationException("cannot encode privateKeyInfo");
            }
        }
Exemple #14
0
        public async Task FileWriteStreamFlushTestAsync()
        {
            byte[] buffer = GetRandomBuffer(512);

            CloudFileShare share = GetRandomShareReference();

            try
            {
                await share.CreateAsync();

                CloudFile file = share.GetRootDirectoryReference().GetFileReference("file1");
                file.StreamWriteSizeInBytes = 1024;
                using (MemoryStream wholeFile = new MemoryStream())
                {
                    FileRequestOptions options = new FileRequestOptions()
                    {
                        StoreFileContentMD5 = true
                    };
                    OperationContext opContext = new OperationContext();
                    using (var fileStream = await file.OpenWriteAsync(4 * 512, null, options, opContext))
                    {
                        for (int i = 0; i < 3; i++)
                        {
                            await fileStream.WriteAsync(buffer, 0, buffer.Length);

                            await wholeFile.WriteAsync(buffer, 0, buffer.Length);
                        }

#if NETCORE
                        // todo: Make some other better logic for this test to be reliable.
                        System.Threading.Thread.Sleep(500);
#endif

                        Assert.AreEqual(2, opContext.RequestResults.Count);

                        await fileStream.FlushAsync();

                        Assert.AreEqual(3, opContext.RequestResults.Count);

                        await fileStream.FlushAsync();

                        Assert.AreEqual(3, opContext.RequestResults.Count);

                        await fileStream.WriteAsync(buffer, 0, buffer.Length);

                        await wholeFile.WriteAsync(buffer, 0, buffer.Length);

                        Assert.AreEqual(3, opContext.RequestResults.Count);

                        await fileStream.CommitAsync();

                        Assert.AreEqual(5, opContext.RequestResults.Count);
                    }

                    Assert.AreEqual(5, opContext.RequestResults.Count);

                    using (MemoryOutputStream downloadedFile = new MemoryOutputStream())
                    {
                        await file.DownloadToStreamAsync(downloadedFile);

                        TestHelper.AssertStreamsAreEqual(wholeFile, downloadedFile.UnderlyingStream);
                    }
                }
            }
            finally
            {
                share.DeleteIfExistsAsync().Wait();
            }
        }
Exemple #15
0
        private static SecretKeyPacket buildSecretKeyPacket(bool isMasterKey, PgpPrivateKey privKey, PgpPublicKey pubKey, IPbeSecretKeyEncryptor keyEncryptor)
        {
            BcpgObject secKey = (BcpgObject)privKey.Key;

            if (secKey == null)
            {
                if (isMasterKey)
                {
                    return(new SecretKeyPacket(pubKey.publicPk, SymmetricKeyAlgorithmTag.Null, null, null, new byte[0]));
                }
                else
                {
                    return(new SecretSubkeyPacket(pubKey.publicPk, SymmetricKeyAlgorithmTag.Null, null, null, new byte[0]));
                }
            }

            try
            {
                MemoryOutputStream bOut = new MemoryOutputStream();
                BcpgOutputStream   pOut = new BcpgOutputStream(bOut);

                pOut.WriteObject(secKey);

                byte[] keyData   = bOut.ToArray();
                byte[] checkData = checksum(keyEncryptor.ChecksumCalculatorFactory, keyData, keyData.Length);

                pOut.Write(checkData, 0, checkData.Length);

                PgpPbeKeyEncryptionParameters encParams = keyEncryptor.AlgorithmDetails;

                SymmetricKeyAlgorithmTag encAlgorithm = (keyEncryptor != null) ? encParams.Algorithm : SymmetricKeyAlgorithmTag.Null;

                if (encAlgorithm != SymmetricKeyAlgorithmTag.Null)
                {
                    keyData = bOut.ToArray(); // include checksum

                    byte[] encData = keyEncryptor.Wrap(keyData).Collect();
                    byte[] iv      = encParams.GetIV();

                    S2k s2k = encParams.S2k;

                    int s2kUsage;

                    if (keyEncryptor.ChecksumCalculatorFactory != null)
                    {
                        if (keyEncryptor.ChecksumCalculatorFactory.AlgorithmDetails.Algorithm != HashAlgorithmTag.Sha1)
                        {
                            throw new PgpException("only SHA1 supported for key checksum calculations.");
                        }
                        s2kUsage = SecretKeyPacket.UsageSha1;
                    }
                    else
                    {
                        s2kUsage = SecretKeyPacket.UsageChecksum;
                    }

                    if (isMasterKey)
                    {
                        return(new SecretKeyPacket(pubKey.publicPk, encAlgorithm, s2kUsage, s2k, iv, encData));
                    }
                    else
                    {
                        return(new SecretSubkeyPacket(pubKey.publicPk, encAlgorithm, s2kUsage, s2k, iv, encData));
                    }
                }
                else
                {
                    if (isMasterKey)
                    {
                        return(new SecretKeyPacket(pubKey.publicPk, encAlgorithm, null, null, bOut.ToArray()));
                    }
                    else
                    {
                        return(new SecretSubkeyPacket(pubKey.publicPk, encAlgorithm, null, null, bOut.ToArray()));
                    }
                }
            }
            catch (PgpException e)
            {
                throw e;
            }
            catch (Exception e)
            {
                throw new PgpException("Exception encrypting key", e);
            }
        }
Exemple #16
0
        public async Task FileWriteStreamBasicTestAsync()
        {
            byte[] buffer = GetRandomBuffer(6 * 512);

#if NETCORE
            MD5 hasher = MD5.Create();
#else
            CryptographicHash hasher = HashAlgorithmProvider.OpenAlgorithm("MD5").CreateHash();
#endif
            CloudFileShare share = GetRandomShareReference();
            share.ServiceClient.DefaultRequestOptions.ParallelOperationThreadCount = 2;

            try
            {
                await share.CreateAsync();

                CloudFile file = share.GetRootDirectoryReference().GetFileReference("file1");
                file.StreamWriteSizeInBytes = 8 * 512;

                using (MemoryStream wholeFile = new MemoryStream())
                {
                    FileRequestOptions options = new FileRequestOptions()
                    {
                        StoreFileContentMD5 = true,
                    };
                    using (var writeStream = await file.OpenWriteAsync(buffer.Length * 3, null, options, null))
                    {
                        Stream fileStream = writeStream;

                        for (int i = 0; i < 3; i++)
                        {
                            await fileStream.WriteAsync(buffer, 0, buffer.Length);

                            await wholeFile.WriteAsync(buffer, 0, buffer.Length);

                            Assert.AreEqual(wholeFile.Position, fileStream.Position);
#if !NETCORE
                            hasher.Append(buffer.AsBuffer());
#endif
                        }

                        await fileStream.FlushAsync();
                    }

#if NETCORE
                    string md5 = Convert.ToBase64String(hasher.ComputeHash(wholeFile.ToArray()));
#else
                    string md5 = CryptographicBuffer.EncodeToBase64String(hasher.GetValueAndReset());
#endif
                    await file.FetchAttributesAsync();

                    Assert.AreEqual(md5, file.Properties.ContentMD5);

                    using (MemoryOutputStream downloadedFile = new MemoryOutputStream())
                    {
                        await file.DownloadToStreamAsync(downloadedFile);

                        TestHelper.AssertStreamsAreEqual(wholeFile, downloadedFile.UnderlyingStream);
                    }

                    await TestHelper.ExpectedExceptionAsync <ArgumentException>(
                        async() => await file.OpenWriteAsync(null, null, options, null),
                        "OpenWrite with StoreFileContentMD5 on an existing file should fail");

                    using (var writeStream = await file.OpenWriteAsync(null))
                    {
                        Stream fileStream = writeStream;
                        fileStream.Seek(buffer.Length / 2, SeekOrigin.Begin);
                        wholeFile.Seek(buffer.Length / 2, SeekOrigin.Begin);

                        for (int i = 0; i < 2; i++)
                        {
                            fileStream.Write(buffer, 0, buffer.Length);
                            wholeFile.Write(buffer, 0, buffer.Length);
                            Assert.AreEqual(wholeFile.Position, fileStream.Position);
                        }

                        await fileStream.FlushAsync();
                    }

                    await file.FetchAttributesAsync();

                    Assert.AreEqual(md5, file.Properties.ContentMD5);

                    using (MemoryOutputStream downloadedFile = new MemoryOutputStream())
                    {
                        options.DisableContentMD5Validation = true;
                        await file.DownloadToStreamAsync(downloadedFile, null, options, null);

                        TestHelper.AssertStreamsAreEqual(wholeFile, downloadedFile.UnderlyingStream);
                    }
                }
            }
            finally
            {
                share.DeleteAsync().Wait();
            }
        }
        /**
         * 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 CmsSignedData Generate(
            // FIXME Avoid accessing more than once to support CmsProcessableInputStream
            ICmsTypedData content,
            bool encapsulate)
        {
            // TODO
            //        if (signerInfs.isEmpty())
            //        {
            //            /* RFC 3852 5.2
            //             * "In the degenerate case where there are no signers, the
            //             * EncapsulatedContentInfo value being "signed" is irrelevant.  In this
            //             * case, the content type within the EncapsulatedContentInfo value being
            //             * "signed" MUST be id-data (as defined in section 4), and the content
            //             * field of the EncapsulatedContentInfo value MUST be omitted."
            //             */
            //            if (encapsulate)
            //            {
            //                throw new IllegalArgumentException("no signers, encapsulate must be false");
            //            }
            //            if (!DATA.equals(eContentType))
            //            {
            //                throw new IllegalArgumentException("no signers, eContentType must be id-data");
            //            }
            //        }
            //
            //        if (!DATA.equals(eContentType))
            //        {
            //            /* RFC 3852 5.3
            //             * [The 'signedAttrs']...
            //             * field is optional, but it MUST be present if the content type of
            //             * the EncapsulatedContentInfo value being signed is not id-data.
            //             */
            //            // TODO signedAttrs must be present for all signers
            //        }

            Asn1EncodableVector digestAlgs  = new Asn1EncodableVector();
            Asn1EncodableVector signerInfos = new Asn1EncodableVector();

            _digests.Clear();  // clear the current preserved digest state

            //
            // add the precalculated SignerInfo objects.
            //
            for (IEnumerator it = _signers.GetEnumerator(); it.MoveNext();)
            {
                SignerInformation signer = (SignerInformation)it.Current;
                digestAlgs.Add(CmsUtilities.fixAlgID(signer.DigestAlgorithmID));

                // TODO Verify the content type and calculated digest match the precalculated SignerInfo
                signerInfos.Add(signer.ToAsn1Structure());
            }

            //
            // add the SignerInfo objects
            //
            DerObjectIdentifier contentTypeOID = content.ContentType;

            Asn1OctetString octs = null;

            if (content.GetContent() != null)
            {
                MemoryOutputStream bOut = null;

                if (encapsulate)
                {
                    bOut = new MemoryOutputStream();
                }

                Stream cOut = CmsUtilities.attachSignersToOutputStream(_signerGens, bOut);

                // Just in case it's unencapsulated and there are no signers!
                cOut = CmsUtilities.getSafeOutputStream(cOut);

                try
                {
                    content.Write(cOut);

                    cOut.Close();
                }
                catch (IOException e)
                {
                    throw new CmsException("data processing exception: " + e.Message, e);
                }

                if (encapsulate)
                {
                    octs = new BerOctetString(bOut.ToArray());
                }
            }

            for (IEnumerator it = _signerGens.GetEnumerator(); it.MoveNext();)
            {
                SignerInfoGenerator sGen = (SignerInfoGenerator)it.Current;
                SignerInfo          inf  = sGen.Generate(contentTypeOID);

                digestAlgs.Add(inf.DigestAlgorithm);
                signerInfos.Add(inf);

                byte[] calcDigest = sGen.getCalculatedDigest();

                if (calcDigest != null)
                {
                    _digests.Add(inf.DigestAlgorithm.Algorithm.Id, calcDigest);
                }
            }

            Asn1Set certificates = null;

            if (_certs.Count != 0)
            {
                certificates = CmsUtilities.CreateBerSetFromList(_certs);
            }

            Asn1Set certrevlist = null;

            if (_crls.Count != 0)
            {
                certrevlist = CmsUtilities.CreateBerSetFromList(_crls);
            }

            ContentInfo encInfo = new ContentInfo(contentTypeOID, octs);

            SignedData sd = new SignedData(
                new DerSet(digestAlgs),
                encInfo,
                certificates,
                certrevlist,
                new DerSet(signerInfos));

            ContentInfo contentInfo = new ContentInfo(
                CmsObjectIdentifiers.SignedData, sd);

            return(new CmsSignedData(content, contentInfo));
        }
Exemple #18
0
        private PemObject createPemObject(Object o)
        {
            String type;

            byte[] encoding;

            if (o is PemObject)
            {
                return((PemObject)o);
            }
            if (o is PemObjectGenerator)
            {
                return(((PemObjectGenerator)o).Generate());
            }
            if (o is X509Certificate)
            {
                type = "CERTIFICATE";

                encoding = ((X509Certificate)o).GetEncoded();
            }
            else if (o is X509Crl)
            {
                type = "X509 CRL";

                encoding = ((X509Crl)o).GetEncoded();
            }
            else if (o is X509TrustedCertificateBlock)
            {
                type = "TRUSTED CERTIFICATE";

                encoding = ((X509TrustedCertificateBlock)o).GetEncoded();
            }
            else if (o is PrivateKeyInfo)
            {
                PrivateKeyInfo      info   = (PrivateKeyInfo)o;
                DerObjectIdentifier algOID = info.PrivateKeyAlgorithm.Algorithm;

                if (algOID.Equals(PkcsObjectIdentifiers.RsaEncryption))
                {
                    type = "RSA PRIVATE KEY";

                    encoding = info.ParsePrivateKey().ToAsn1Object().GetEncoded();
                }
                else if (algOID.Equals(dsaOids[0]) || algOID.Equals(dsaOids[1]))
                {
                    type = "DSA PRIVATE KEY";

                    DsaParameter        p = DsaParameter.GetInstance(info.PrivateKeyAlgorithm.Parameters);
                    Asn1EncodableVector v = new Asn1EncodableVector();

                    v.Add(new DerInteger(0));
                    v.Add(new DerInteger(p.P));
                    v.Add(new DerInteger(p.Q));
                    v.Add(new DerInteger(p.G));

                    BigInteger x = DerInteger.GetInstance(info.ParsePrivateKey()).Value;
                    BigInteger y = p.G.ModPow(x, p.P);

                    v.Add(new DerInteger(y));
                    v.Add(new DerInteger(x));

                    encoding = new DerSequence(v).GetEncoded();
                }
                else if (algOID.Equals(X9ObjectIdentifiers.IdECPublicKey))
                {
                    type = "EC PRIVATE KEY";

                    encoding = info.ParsePrivateKey().ToAsn1Object().GetEncoded();
                }
                else
                {
                    type = "PRIVATE KEY";

                    encoding = info.GetEncoded();
                }
            }
            else if (o is SubjectPublicKeyInfo)
            {
                type = "PUBLIC KEY";

                encoding = ((SubjectPublicKeyInfo)o).GetEncoded();
            }

            /*
             * else if (o is X509AttributeCertificateHolder)
             * {
             *  type = "ATTRIBUTE CERTIFICATE";
             *  encoding = ((X509AttributeCertificateHolder)o).getEncoded();
             * }
             */
            else if (o is Pkcs8EncryptedPrivateKeyInfo)
            {
                type     = "ENCRYPTED PRIVATE KEY";
                encoding = ((Pkcs8EncryptedPrivateKeyInfo)o).GetEncoded();
            }
            else if (o is Pkcs10CertificationRequest)
            {
                type     = "CERTIFICATE REQUEST";
                encoding = ((Pkcs10CertificationRequest)o).GetEncoded();
            }
            else if (o is ContentInfo)
            {
                type     = "PKCS7";
                encoding = ((ContentInfo)o).GetEncoded();
            }
            else
            {
                throw new PemGenerationException("unknown object passed - can't encode.");
            }

            if (encryptorBuilder != null)
            {
                String dekAlgName = Platform.ToUpperInvariant(encryptorBuilder.AlgorithmDetails.Info);

                // Note: For backward compatibility
                if (dekAlgName.StartsWith("DESEDE"))
                {
                    dekAlgName = "DES-EDE3-CBC";
                }

                MemoryOutputStream bOut      = new MemoryOutputStream();
                ICipher            encryptor = encryptorBuilder.BuildCipher(bOut);

                using (var stream = encryptor.Stream)
                {
                    stream.Write(encoding, 0, encoding.Length);
                }

                byte[] encData = bOut.ToArray();

                IList headers = Platform.CreateArrayList();

                headers.Add(new PemHeader("Proc-Type", "4,ENCRYPTED"));
                headers.Add(new PemHeader("DEK-Info", encryptorBuilder.AlgorithmDetails.Info));

                return(new PemObject(type, headers, encData));
            }

            return(new PemObject(type, encoding));
        }