private Stream Open(Stream outStream, string encryptionOid, CipherKeyGenerator keyGen)
{
byte[] array = keyGen.GenerateKey();
KeyParameter keyParameter = ParameterUtilities.CreateKeyParameter(encryptionOid, array);
Asn1Encodable asn1Params = GenerateAsn1Parameters(encryptionOid, array);
ICipherParameters cipherParameters;
AlgorithmIdentifier algorithmIdentifier = GetAlgorithmIdentifier(encryptionOid, keyParameter, asn1Params, out cipherParameters);
Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
global::System.Collections.IEnumerator enumerator = ((global::System.Collections.IEnumerable)recipientInfoGenerators).GetEnumerator();
try
{
while (enumerator.MoveNext())
{
RecipientInfoGenerator recipientInfoGenerator = (RecipientInfoGenerator)enumerator.get_Current();
try
{
asn1EncodableVector.Add(recipientInfoGenerator.Generate(keyParameter, rand));
}
catch (InvalidKeyException e)
{
throw new CmsException("key inappropriate for algorithm.", e);
}
catch (GeneralSecurityException e2)
{
throw new CmsException("error making encrypted content.", e2);
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
return(Open(outStream, algorithmIdentifier, cipherParameters, asn1EncodableVector));
}
private CmsEnvelopedData Generate(CmsProcessable content, string encryptionOid, CipherKeyGenerator keyGen)
{
//IL_0045: Unknown result type (might be due to invalid IL or missing references)
//IL_004c: Expected O, but got Unknown
//IL_0096: Expected O, but got Unknown
AlgorithmIdentifier algorithmIdentifier = null;
KeyParameter keyParameter;
Asn1OctetString encryptedContent;
try
{
byte[] array = keyGen.GenerateKey();
keyParameter = ParameterUtilities.CreateKeyParameter(encryptionOid, array);
Asn1Encodable asn1Params = GenerateAsn1Parameters(encryptionOid, array);
algorithmIdentifier = GetAlgorithmIdentifier(encryptionOid, keyParameter, asn1Params, out var cipherParameters);
IBufferedCipher cipher = CipherUtilities.GetCipher(encryptionOid);
cipher.Init(forEncryption: true, new ParametersWithRandom(cipherParameters, rand));
MemoryStream val = new MemoryStream();
CipherStream cipherStream = new CipherStream((Stream)(object)val, null, cipher);
content.Write((Stream)(object)cipherStream);
Platform.Dispose((Stream)(object)cipherStream);
encryptedContent = new BerOctetString(val.ToArray());
}
catch (SecurityUtilityException e)
{
throw new CmsException("couldn't create cipher.", e);
}
catch (InvalidKeyException e2)
{
throw new CmsException("key invalid in message.", e2);
}
catch (IOException val2)
{
IOException e3 = val2;
throw new CmsException("exception decoding algorithm parameters.", (global::System.Exception)(object) e3);
}
Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
global::System.Collections.IEnumerator enumerator = ((global::System.Collections.IEnumerable)recipientInfoGenerators).GetEnumerator();
try
{
while (enumerator.MoveNext())
{
RecipientInfoGenerator recipientInfoGenerator = (RecipientInfoGenerator)enumerator.get_Current();
try
{
asn1EncodableVector.Add(recipientInfoGenerator.Generate(keyParameter, rand));
}
catch (InvalidKeyException e4)
{
throw new CmsException("key inappropriate for algorithm.", e4);
}
catch (GeneralSecurityException e5)
{
throw new CmsException("error making encrypted content.", e5);
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
EncryptedContentInfo encryptedContentInfo = new EncryptedContentInfo(CmsObjectIdentifiers.Data, algorithmIdentifier, encryptedContent);
Asn1Set unprotectedAttrs = null;
if (unprotectedAttributeGenerator != null)
{
Org.BouncyCastle.Asn1.Cms.AttributeTable attributes = unprotectedAttributeGenerator.GetAttributes(Platform.CreateHashtable());
unprotectedAttrs = new BerSet(attributes.ToAsn1EncodableVector());
}
ContentInfo contentInfo = new ContentInfo(CmsObjectIdentifiers.EnvelopedData, new EnvelopedData(null, new DerSet(asn1EncodableVector), encryptedContentInfo, unprotectedAttrs));
return(new CmsEnvelopedData(contentInfo));
}
private CmsAuthenticatedData Generate(CmsProcessable content, string macOid, CipherKeyGenerator keyGen)
{
//IL_0039: Unknown result type (might be due to invalid IL or missing references)
//IL_0040: Expected O, but got Unknown
//IL_009f: Expected O, but got Unknown
KeyParameter keyParameter;
AlgorithmIdentifier algorithmIdentifier;
Asn1OctetString content2;
Asn1OctetString mac2;
try
{
byte[] array = keyGen.GenerateKey();
keyParameter = ParameterUtilities.CreateKeyParameter(macOid, array);
Asn1Encodable asn1Params = GenerateAsn1Parameters(macOid, array);
algorithmIdentifier = GetAlgorithmIdentifier(macOid, keyParameter, asn1Params, out var _);
IMac mac = MacUtilities.GetMac(macOid);
mac.Init(keyParameter);
MemoryStream val = new MemoryStream();
Stream val2 = (Stream)(object)new TeeOutputStream((Stream)(object)val, (Stream)(object)new MacOutputStream(mac));
content.Write(val2);
Platform.Dispose(val2);
content2 = new BerOctetString(val.ToArray());
byte[] str = MacUtilities.DoFinal(mac);
mac2 = new DerOctetString(str);
}
catch (SecurityUtilityException e)
{
throw new CmsException("couldn't create cipher.", e);
}
catch (InvalidKeyException e2)
{
throw new CmsException("key invalid in message.", e2);
}
catch (IOException val3)
{
IOException e3 = val3;
throw new CmsException("exception decoding algorithm parameters.", (global::System.Exception)(object) e3);
}
Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
global::System.Collections.IEnumerator enumerator = ((global::System.Collections.IEnumerable)recipientInfoGenerators).GetEnumerator();
try
{
while (enumerator.MoveNext())
{
RecipientInfoGenerator recipientInfoGenerator = (RecipientInfoGenerator)enumerator.get_Current();
try
{
asn1EncodableVector.Add(recipientInfoGenerator.Generate(keyParameter, rand));
}
catch (InvalidKeyException e4)
{
throw new CmsException("key inappropriate for algorithm.", e4);
}
catch (GeneralSecurityException e5)
{
throw new CmsException("error making encrypted content.", e5);
}
}
}
finally
{
global::System.IDisposable disposable = enumerator as global::System.IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
ContentInfo encapsulatedContent = new ContentInfo(CmsObjectIdentifiers.Data, content2);
ContentInfo contentInfo = new ContentInfo(CmsObjectIdentifiers.AuthenticatedData, new AuthenticatedData(null, new DerSet(asn1EncodableVector), algorithmIdentifier, null, encapsulatedContent, null, mac2, null));
return(new CmsAuthenticatedData(contentInfo));
}