public DTLSSecurityParameters(Version version, HandshakeInfo handshakeInfo)
{
_HandshakeInfo = handshakeInfo;
if (handshakeInfo != null)
{
_ClientRandom = handshakeInfo.ClientRandom.Serialise();
_ServerRandom = handshakeInfo.ServerRandom.Serialise();
}
TPseudorandomFunction prf = CipherSuites.GetPseudorandomFunction(version, handshakeInfo.CipherSuite);
switch (prf)
{
case TPseudorandomFunction.NotSet:
break;
case TPseudorandomFunction.Legacy:
_PrfAlgorithm = Org.BouncyCastle.Crypto.Tls.PrfAlgorithm.tls_prf_legacy;
break;
case TPseudorandomFunction.SHA256:
_PrfAlgorithm = Org.BouncyCastle.Crypto.Tls.PrfAlgorithm.tls_prf_sha256;
break;
case TPseudorandomFunction.SHA384:
_PrfAlgorithm = Org.BouncyCastle.Crypto.Tls.PrfAlgorithm.tls_prf_sha384;
break;
default:
break;
}
}
public CipherSuite(TCipherSuite cipherSuite, TKeyExchangeAlgorithm keyExchangeAlgorithm, TSignatureAlgorithm signatureAlgorithm, Version minVersion, TPseudorandomFunction prf)
{
Suite = cipherSuite;
KeyExchangeAlgorithm = keyExchangeAlgorithm;
SignatureAlgorithm = signatureAlgorithm;
MinVersion = minVersion;
PRF = prf;
}
public CipherSuite(TCipherSuite cipherSuite, TKeyExchangeAlgorithm keyExchangeAlgorithm, TSignatureAlgorithm signatureAlgorithm, Version minVersion,TPseudorandomFunction prf)
{
Suite = cipherSuite;
KeyExchangeAlgorithm = keyExchangeAlgorithm;
SignatureAlgorithm = signatureAlgorithm;
MinVersion = minVersion;
PRF = prf;
}
public CipherSuite(TCipherSuite cipherSuite, TKeyExchangeAlgorithm keyExchangeAlgorithm,
TSignatureAlgorithm signatureAlgorithm, Version minVersion, TPseudorandomFunction prf)
{
this.Suite = cipherSuite;
this.KeyExchangeAlgorithm = keyExchangeAlgorithm;
this.SignatureAlgorithm = signatureAlgorithm;
this.MinVersion = minVersion ?? throw new ArgumentNullException(nameof(minVersion));
this.PRF = prf;
}
public static TPseudorandomFunction GetPseudorandomFunction(Version version, TCipherSuite cipherSuite)
{
TPseudorandomFunction result = TPseudorandomFunction.Legacy;
if (version >= DTLSRecord.Version1_2)
{
CipherSuite suite;
if (_CipherSuites.TryGetValue(cipherSuite, out suite))
{
result = suite.PRF;
}
}
return(result);
}
