private Asn1Object createDerForRecipient(byte[] inp, X509Certificate cert)
{
var s = "1.2.840.113549.3.2";
var outp = new byte[100];
var derob = new DerObjectIdentifier(s);
var keyp = IvGenerator.GetIv(16);
var cf = CipherUtilities.GetCipher(derob);
var kp = new KeyParameter(keyp);
var iv = IvGenerator.GetIv(cf.GetBlockSize());
var piv = new ParametersWithIV(kp, iv);
cf.Init(true, piv);
var len = cf.DoFinal(inp, outp, 0);
var abyte1 = new byte[len];
System.Array.Copy(outp, 0, abyte1, 0, len);
var deroctetstring = new DerOctetString(abyte1);
var keytransrecipientinfo = computeRecipientInfo(cert, keyp);
var derset = new DerSet(new RecipientInfo(keytransrecipientinfo));
var ev = new Asn1EncodableVector
{
new DerInteger(58),
new DerOctetString(iv)
};
var seq = new DerSequence(ev);
var algorithmidentifier = new AlgorithmIdentifier(derob, seq);
var encryptedcontentinfo =
new EncryptedContentInfo(PkcsObjectIdentifiers.Data, algorithmidentifier, deroctetstring);
var env = new EnvelopedData(null, derset, encryptedcontentinfo, (Asn1Set)null);
var contentinfo =
new Org.BouncyCastle.Asn1.Cms.ContentInfo(PkcsObjectIdentifiers.EnvelopedData, env);
return(contentinfo.ToAsn1Object());
}
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());
}
public CmsEnvelopedData(
ContentInfo contentInfo)
{
this.contentInfo = contentInfo;
EnvelopedData envData = EnvelopedData.GetInstance(contentInfo.Content);
//
// read the encrypted content info
//
EncryptedContentInfo encInfo = envData.EncryptedContentInfo;
this.encAlg = encInfo.ContentEncryptionAlgorithm;
//
// load the RecipientInfoStore
//
byte[] contentOctets = encInfo.EncryptedContent.GetOctets();
IList infos = CmsEnvelopedHelper.ReadRecipientInfos(
envData.RecipientInfos, contentOctets, encAlg, null, null);
this.recipientInfoStore = new RecipientInformationStore(infos);
this.unprotectedAttributes = envData.UnprotectedAttrs;
}
/// <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);
Platform.Dispose(cOut);
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));
}
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));
}
public CmsEnvelopedData Generate(CmsProcessable content, ICipherBuilderWithKey cipherBuilder)
{
//AlgorithmIdentifier encAlgId = null;
KeyParameter encKey;
Asn1OctetString encContent;
try
{
encKey = (KeyParameter)cipherBuilder.Key;
MemoryStream collector = new MemoryStream();
Stream bOut = cipherBuilder.BuildCipher(collector).Stream;
content.Write(bOut);
Platform.Dispose(bOut);
encContent = new BerOctetString(collector.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,
(AlgorithmIdentifier)cipherBuilder.AlgorithmDetails,
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));
}
private CmsEnvelopedData Generate(CmsProcessable content, string encryptionOid, CipherKeyGenerator keyGen)
{
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 ICipherParameters cipherParameters);
IBufferedCipher cipher = CipherUtilities.GetCipher(encryptionOid);
cipher.Init(forEncryption: true, new ParametersWithRandom(cipherParameters, rand));
MemoryStream memoryStream = new MemoryStream();
CipherStream cipherStream = new CipherStream(memoryStream, null, cipher);
content.Write(cipherStream);
Platform.Dispose(cipherStream);
encryptedContent = new BerOctetString(memoryStream.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 e3)
{
throw new CmsException("exception decoding algorithm parameters.", e3);
}
Asn1EncodableVector asn1EncodableVector = new Asn1EncodableVector();
foreach (RecipientInfoGenerator recipientInfoGenerator in recipientInfoGenerators)
{
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);
}
}
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));
}
/// <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 = null;
Asn1OctetString encContent;
try
{
IBufferedCipher cipher = CipherUtilities.GetCipher(encryptionOid);
byte[] encKeyBytes = keyGen.GenerateKey();
encKey = ParameterUtilities.CreateKeyParameter(encryptionOid, encKeyBytes);
Asn1Encodable asn1Params = null;
try
{
if (encryptionOid.Equals(RC2Cbc))
{
// mix in a bit extra...
rand.SetSeed(DateTime.Now.Ticks);
byte[] iv = rand.GenerateSeed(8);
// TODO Is this detailed repeat of Java version really necessary?
int effKeyBits = encKeyBytes.Length * 8;
int parameterVersion;
if (effKeyBits < 256)
{
parameterVersion = rc2Table[effKeyBits];
}
else
{
parameterVersion = effKeyBits;
}
asn1Params = new RC2CbcParameter(parameterVersion, iv);
}
else
{
asn1Params = ParameterUtilities.GenerateParameters(encryptionOid, rand);
}
}
catch (SecurityUtilityException)
{
// No problem... no parameters generated
}
Asn1Object asn1Object;
ICipherParameters cipherParameters;
if (asn1Params != null)
{
asn1Object = asn1Params.ToAsn1Object();
cipherParameters = ParameterUtilities.GetCipherParameters(
encryptionOid, encKey, asn1Object);
}
else
{
asn1Object = DerNull.Instance;
cipherParameters = encKey;
}
encAlgId = new AlgorithmIdentifier(
new DerObjectIdentifier(encryptionOid),
asn1Object);
cipher.Init(true, cipherParameters);
MemoryStream bOut = new MemoryStream();
CipherStream cOut = new CipherStream(bOut, null, cipher);
content.Write(cOut);
cOut.Close();
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 (RecipientInf recipient in recipientInfs)
{
try
{
recipientInfos.Add(recipient.ToRecipientInfo(encKey));
}
catch (IOException e)
{
throw new CmsException("encoding error.", e);
}
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(
PkcsObjectIdentifiers.Data,
encAlgId,
encContent);
Asn1.Cms.ContentInfo contentInfo = new Asn1.Cms.ContentInfo(
PkcsObjectIdentifiers.EnvelopedData,
new EnvelopedData(null, new DerSet(recipientInfos), eci, null));
return(new CmsEnvelopedData(contentInfo));
}
