private static byte[] RSAEncryptData(AsymmetricKeyParameter publicKey, byte[] originalDataBytes)
{
bool isEncryption = true;
byte[] encryptedDataArray;
using (MemoryStream originalDataStream = new MemoryStream(originalDataBytes, false))
{
using (MemoryStream encryptedDataStream = new MemoryStream())
{
IBufferedCipher rsacipher = RSACreateCipher(isEncryption, publicKey);
using (CipherStream cipherStream = new CipherStream(originalDataStream, rsacipher, null))
{
int oneByte;
while ((oneByte = cipherStream.ReadByte()) >= 0)
{
encryptedDataStream.WriteByte((byte)oneByte);
}
cipherStream.Close();
cipherStream.Dispose();
}
encryptedDataArray = encryptedDataStream.ToArray();
encryptedDataStream.Close();
encryptedDataStream.Dispose();
}
originalDataStream.Close();
originalDataStream.Dispose();
}
return(encryptedDataArray);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
_out.Dispose();
// TODO Parent context(s) should really be be closed explicitly
_eiGen.Close();
if (_outer.unprotectedAttributeGenerator != null)
{
Asn1.Cms.AttributeTable attrTable = _outer.unprotectedAttributeGenerator.GetAttributes(Platform.CreateHashtable());
Asn1Set unprotectedAttrs = new BerSet(attrTable.ToAsn1EncodableVector());
_envGen.AddObject(new DerTaggedObject(false, 1, unprotectedAttrs));
}
_envGen.Close();
_cGen.Close();
}
base.Dispose(disposing);
}
private void Dispose(bool Disposing)
{
if (!m_isDisposed && Disposing)
{
try
{
m_progressTotal = 0;
m_volumeKey.Reset();
if (m_cipherStream != null)
{
m_cipherStream.Dispose();
}
}
finally
{
m_isDisposed = true;
}
}
}
protected override void Dispose(bool disposing)
{
_out.Dispose();
this.CloseParentContext();
base.Dispose(disposing);
}
/// <summary>
/// Generate an enveloped object that contains a CMS Enveloped Data
/// object using the passed in key generator.
/// </summary>
private CmsEnvelopedData Generate(
CmsProcessable content,
string encryptionOid,
CipherKeyGenerator keyGen)
{
AlgorithmIdentifier encAlgId = null;
KeyParameter encKey;
Asn1OctetString encContent;
try
{
byte[] encKeyBytes = keyGen.GenerateKey();
encKey = ParameterUtilities.CreateKeyParameter(encryptionOid, encKeyBytes);
Asn1Encodable asn1Params = GenerateAsn1Parameters(encryptionOid, encKeyBytes);
ICipherParameters cipherParameters;
encAlgId = GetAlgorithmIdentifier(
encryptionOid, encKey, asn1Params, out cipherParameters);
IBufferedCipher cipher = CipherUtilities.GetCipher(encryptionOid);
cipher.Init(true, new ParametersWithRandom(cipherParameters, rand));
MemoryStream bOut = new MemoryStream();
CipherStream cOut = new CipherStream(bOut, null, cipher);
content.Write(cOut);
cOut.Dispose();
encContent = new BerOctetString(bOut.ToArray());
}
catch (SecurityUtilityException e)
{
throw new CmsException("couldn't create cipher.", e);
}
catch (InvalidKeyException e)
{
throw new CmsException("key invalid in message.", e);
}
catch (IOException e)
{
throw new CmsException("exception decoding algorithm parameters.", e);
}
Asn1EncodableVector recipientInfos = new Asn1EncodableVector();
foreach (RecipientInfoGenerator rig in recipientInfoGenerators)
{
try
{
recipientInfos.Add(rig.Generate(encKey, rand));
}
catch (InvalidKeyException e)
{
throw new CmsException("key inappropriate for algorithm.", e);
}
catch (GeneralSecurityException e)
{
throw new CmsException("error making encrypted content.", e);
}
}
EncryptedContentInfo eci = new EncryptedContentInfo(
CmsObjectIdentifiers.Data,
encAlgId,
encContent);
Asn1Set unprotectedAttrSet = null;
if (unprotectedAttributeGenerator != null)
{
Asn1.Cms.AttributeTable attrTable = unprotectedAttributeGenerator.GetAttributes(Platform.CreateHashtable());
unprotectedAttrSet = new BerSet(attrTable.ToAsn1EncodableVector());
}
ContentInfo contentInfo = new ContentInfo(
CmsObjectIdentifiers.EnvelopedData,
new EnvelopedData(null, new DerSet(recipientInfos), eci, unprotectedAttrSet));
return(new CmsEnvelopedData(contentInfo));
}
