public override void GenerateClientKeyExchange(Stream output)
{
if (mAgreementCredentials == null)
{
mDHAgreePrivateKey = TlsDHUtilities.GenerateEphemeralClientKeyExchange(mContext.SecureRandom, mDHParameters, output);
}
}
public byte[] GenerateServerKeyExchange()
{
if (this.mDHParameters == null)
{
throw new TlsFatalAlert(AlertDescription.internal_error);
}
DigestInputBuffer buf = new DigestInputBuffer();
this.mDHAgreePrivateKey = TlsDHUtilities.GenerateEphemeralServerKeyExchange(mContext.SecureRandom, this.mDHParameters, buf);
/*
* RFC 5246 4.7. digitally-signed element needs SignatureAndHashAlgorithm from TLS 1.2
*/
SignatureAndHashAlgorithm signatureAndHashAlgorithm = TlsUtilities.GetSignatureAndHashAlgorithm(
mContext, mServerCredentials);
IDigest d = TlsUtilities.CreateHash(signatureAndHashAlgorithm);
SecurityParameters securityParameters = mContext.SecurityParameters;
d.BlockUpdate(securityParameters.ClientRandom, 0, securityParameters.ClientRandom.Length);
d.BlockUpdate(securityParameters.ServerRandom, 0, securityParameters.ServerRandom.Length);
buf.UpdateDigest(d);
byte[] hash = DigestUtilities.DoFinal(d);
byte[] signature = mServerCredentials.GenerateCertificateSignature(hash);
DigitallySigned signed_params = new DigitallySigned(signatureAndHashAlgorithm, signature);
signed_params.Encode(buf);
return(buf.ToArray());
}
public override void ProcessClientKeyExchange(Stream input)
{
byte[] array = TlsUtilities.ReadOpaque16(input);
mPsk = mPskIdentityManager.GetPsk(array);
if (mPsk == null)
{
throw new TlsFatalAlert(115);
}
mContext.SecurityParameters.pskIdentity = array;
if (mKeyExchange == 14)
{
BigInteger y = TlsDHUtilities.ReadDHParameter(input);
mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(new DHPublicKeyParameters(y, mDHParameters));
}
else if (mKeyExchange == 24)
{
byte[] encoding = TlsUtilities.ReadOpaque8(input);
ECDomainParameters parameters = mECAgreePrivateKey.Parameters;
mECAgreePublicKey = TlsEccUtilities.ValidateECPublicKey(TlsEccUtilities.DeserializeECPublicKey(mServerECPointFormats, parameters, encoding));
}
else if (mKeyExchange == 15)
{
byte[] encryptedPreMasterSecret = (!TlsUtilities.IsSsl(mContext)) ? TlsUtilities.ReadOpaque16(input) : Streams.ReadAll(input);
mPremasterSecret = mServerCredentials.DecryptPreMasterSecret(encryptedPreMasterSecret);
}
}
public override void GenerateClientKeyExchange(Stream output)
{
if (mPskIdentityHint == null)
{
mPskIdentity.SkipIdentityHint();
}
else
{
mPskIdentity.NotifyIdentityHint(mPskIdentityHint);
}
byte[] pskIdentity = mPskIdentity.GetPskIdentity();
if (pskIdentity == null)
{
throw new TlsFatalAlert(80);
}
mPsk = mPskIdentity.GetPsk();
if (mPsk == null)
{
throw new TlsFatalAlert(80);
}
TlsUtilities.WriteOpaque16(pskIdentity, output);
mContext.SecurityParameters.pskIdentity = pskIdentity;
if (mKeyExchange == 14)
{
mDHAgreePrivateKey = TlsDHUtilities.GenerateEphemeralClientKeyExchange(mContext.SecureRandom, mDHParameters, output);
}
else if (mKeyExchange == 24)
{
mECAgreePrivateKey = TlsEccUtilities.GenerateEphemeralClientKeyExchange(mContext.SecureRandom, mServerECPointFormats, mECAgreePublicKey.Parameters, output);
}
else if (mKeyExchange == 15)
{
mPremasterSecret = TlsRsaUtilities.GenerateEncryptedPreMasterSecret(mContext, mRsaServerPublicKey, output);
}
}
public override byte[] GenerateServerKeyExchange()
{
mPskIdentityHint = mPskIdentityManager.GetHint();
if (mPskIdentityHint == null && !RequiresServerKeyExchange)
{
return(null);
}
MemoryStream memoryStream = new MemoryStream();
if (mPskIdentityHint == null)
{
TlsUtilities.WriteOpaque16(TlsUtilities.EmptyBytes, memoryStream);
}
else
{
TlsUtilities.WriteOpaque16(mPskIdentityHint, memoryStream);
}
if (mKeyExchange == 14)
{
if (mDHParameters == null)
{
throw new TlsFatalAlert(80);
}
mDHAgreePrivateKey = TlsDHUtilities.GenerateEphemeralServerKeyExchange(mContext.SecureRandom, mDHParameters, memoryStream);
}
else if (mKeyExchange == 24)
{
mECAgreePrivateKey = TlsEccUtilities.GenerateEphemeralServerKeyExchange(mContext.SecureRandom, mNamedCurves, mClientECPointFormats, memoryStream);
}
return(memoryStream.ToArray());
}
protected virtual DHParameters ValidateDHParameters(DHParameters parameters)
{
if (parameters.P.BitLength < MinimumPrimeBits)
{
throw new TlsFatalAlert(71);
}
return(TlsDHUtilities.ValidateDHParameters(parameters));
}
public override void ProcessClientKeyExchange(Stream input)
{
if (mDHAgreePublicKey == null)
{
BigInteger y = TlsDHUtilities.ReadDHParameter(input);
mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(new DHPublicKeyParameters(y, mDHParameters));
}
}
public static ServerDHParams Parse(Stream input)
{
BigInteger p = TlsDHUtilities.ReadDHParameter(input);
BigInteger g = TlsDHUtilities.ReadDHParameter(input);
BigInteger y = TlsDHUtilities.ReadDHParameter(input);
return(new ServerDHParams(TlsDHUtilities.ValidateDHPublicKey(new DHPublicKeyParameters(y, new DHParameters(p, g)))));
}
public virtual void Encode(Stream output)
{
DHParameters parameters = mPublicKey.Parameters;
BigInteger y = mPublicKey.Y;
TlsDHUtilities.WriteDHParameter(parameters.P, output);
TlsDHUtilities.WriteDHParameter(parameters.G, output);
TlsDHUtilities.WriteDHParameter(y, output);
}
public override byte[] GeneratePremasterSecret()
{
if (mAgreementCredentials != null)
{
return(mAgreementCredentials.GenerateAgreement(mDHAgreePublicKey));
}
if (mDHAgreePrivateKey != null)
{
return(TlsDHUtilities.CalculateDHBasicAgreement(mDHAgreePublicKey, mDHAgreePrivateKey));
}
throw new TlsFatalAlert(80);
}
public override void ProcessServerKeyExchange(Stream input)
{
mPskIdentityHint = TlsUtilities.ReadOpaque16(input);
if (mKeyExchange == 14)
{
ServerDHParams serverDHParams = ServerDHParams.Parse(input);
mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(serverDHParams.PublicKey);
mDHParameters = mDHAgreePublicKey.Parameters;
}
else if (mKeyExchange == 24)
{
ECDomainParameters curve_params = TlsEccUtilities.ReadECParameters(mNamedCurves, mClientECPointFormats, input);
byte[] encoding = TlsUtilities.ReadOpaque8(input);
mECAgreePublicKey = TlsEccUtilities.ValidateECPublicKey(TlsEccUtilities.DeserializeECPublicKey(mClientECPointFormats, curve_params, encoding));
}
}
public override void ProcessServerKeyExchange(Stream input)
{
SecurityParameters securityParameters = mContext.SecurityParameters;
SignerInputBuffer signerInputBuffer = new SignerInputBuffer();
Stream input2 = new TeeInputStream(input, signerInputBuffer);
ServerDHParams serverDHParams = ServerDHParams.Parse(input2);
DigitallySigned digitallySigned = ParseSignature(input);
ISigner signer = InitVerifyer(mTlsSigner, digitallySigned.Algorithm, securityParameters);
signerInputBuffer.UpdateSigner(signer);
if (!signer.VerifySignature(digitallySigned.Signature))
{
throw new TlsFatalAlert(51);
}
mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(serverDHParams.PublicKey);
mDHParameters = ValidateDHParameters(mDHAgreePublicKey.Parameters);
}
public override void ProcessServerCertificate(Certificate serverCertificate)
{
if (serverCertificate.IsEmpty)
{
throw new TlsFatalAlert(42);
}
X509CertificateStructure certificateAt = serverCertificate.GetCertificateAt(0);
SubjectPublicKeyInfo subjectPublicKeyInfo = certificateAt.SubjectPublicKeyInfo;
try
{
mServerPublicKey = PublicKeyFactory.CreateKey(subjectPublicKeyInfo);
}
catch (Exception alertCause)
{
throw new TlsFatalAlert(43, alertCause);
}
if (mTlsSigner == null)
{
try
{
mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey((DHPublicKeyParameters)mServerPublicKey);
mDHParameters = ValidateDHParameters(mDHAgreePublicKey.Parameters);
}
catch (InvalidCastException alertCause2)
{
throw new TlsFatalAlert(46, alertCause2);
}
TlsUtilities.ValidateKeyUsage(certificateAt, 8);
}
else
{
if (!mTlsSigner.IsValidPublicKey(mServerPublicKey))
{
throw new TlsFatalAlert(46);
}
TlsUtilities.ValidateKeyUsage(certificateAt, 128);
}
base.ProcessServerCertificate(serverCertificate);
}
public override byte[] GenerateServerKeyExchange()
{
if (mDHParameters == null)
{
throw new TlsFatalAlert(80);
}
DigestInputBuffer digestInputBuffer = new DigestInputBuffer();
mDHAgreePrivateKey = TlsDHUtilities.GenerateEphemeralServerKeyExchange(mContext.SecureRandom, mDHParameters, digestInputBuffer);
SignatureAndHashAlgorithm signatureAndHashAlgorithm = TlsUtilities.GetSignatureAndHashAlgorithm(mContext, mServerCredentials);
IDigest digest = TlsUtilities.CreateHash(signatureAndHashAlgorithm);
SecurityParameters securityParameters = mContext.SecurityParameters;
digest.BlockUpdate(securityParameters.clientRandom, 0, securityParameters.clientRandom.Length);
digest.BlockUpdate(securityParameters.serverRandom, 0, securityParameters.serverRandom.Length);
digestInputBuffer.UpdateDigest(digest);
byte[] hash = DigestUtilities.DoFinal(digest);
byte[] signature = mServerCredentials.GenerateCertificateSignature(hash);
DigitallySigned digitallySigned = new DigitallySigned(signatureAndHashAlgorithm, signature);
digitallySigned.Encode(digestInputBuffer);
return(digestInputBuffer.ToArray());
}
public override void ProcessServerKeyExchange(Stream input)
{
SecurityParameters securityParameters = mContext.SecurityParameters;
SignerInputBuffer buf = new SignerInputBuffer();
Stream teeIn = new TeeInputStream(input, buf);
ServerDHParams dhParams = ServerDHParams.Parse(teeIn);
DigitallySigned signed_params = ParseSignature(input);
mSignatureAndHashAlgorithm = signed_params.Algorithm;
ISigner signer = InitVerifyer(mTlsSigner, signed_params.Algorithm, securityParameters);
buf.UpdateSigner(signer);
if (!signer.VerifySignature(signed_params.Signature))
{
throw new TlsFatalAlert(AlertDescription.decrypt_error);
}
this.mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(dhParams.PublicKey);
this.mDHParameters = ValidateDHParameters(mDHAgreePublicKey.Parameters);
}
protected virtual byte[] GenerateOtherSecret(int pskLength)
{
if (mKeyExchange == 14)
{
if (mDHAgreePrivateKey != null)
{
return(TlsDHUtilities.CalculateDHBasicAgreement(mDHAgreePublicKey, mDHAgreePrivateKey));
}
throw new TlsFatalAlert(80);
}
if (mKeyExchange == 24)
{
if (mECAgreePrivateKey != null)
{
return(TlsEccUtilities.CalculateECDHBasicAgreement(mECAgreePublicKey, mECAgreePrivateKey));
}
throw new TlsFatalAlert(80);
}
if (mKeyExchange == 15)
{
return(mPremasterSecret);
}
return(new byte[pskLength]);
}
