public SafeNCryptSecretHandle DeriveSecretAgreementHandle(ECDiffieHellmanPublicKey otherPartyPublicKey)
{
if (otherPartyPublicKey == null)
{
throw new ArgumentNullException("otherPartyPublicKey");
}
ECDiffieHellmanCngPublicKey key = otherPartyPublicKey as ECDiffieHellmanCngPublicKey;
if (otherPartyPublicKey == null)
{
throw new ArgumentException(System.SR.GetString("Cryptography_ArgExpectedECDiffieHellmanCngPublicKey"));
}
using (CngKey key2 = key.Import())
{
return(this.DeriveSecretAgreementHandle(key2));
}
}
public override byte[] DeriveKeyMaterial(ECDiffieHellmanPublicKey otherPartyPublicKey)
{
if (otherPartyPublicKey == null)
{
throw new ArgumentNullException("otherPartyPublicKey");
}
ECDiffieHellmanCngPublicKey key = otherPartyPublicKey as ECDiffieHellmanCngPublicKey;
if (otherPartyPublicKey == null)
{
throw new ArgumentException(System.SR.GetString("Cryptography_ArgExpectedECDiffieHellmanCngPublicKey"));
}
using (CngKey key2 = key.Import())
{
return(this.DeriveKeyMaterial(key2));
}
}
/// <summary>
/// Get a handle to the secret agreement generated between two parties
/// </summary>
public SafeNCryptSecretHandle DeriveSecretAgreementHandle(ECDiffieHellmanPublicKey otherPartyPublicKey)
{
if (otherPartyPublicKey == null)
{
throw new ArgumentNullException("otherPartyPublicKey");
}
// We can only work with ECDiffieHellmanCngPublicKeys
ECDiffieHellmanCngPublicKey otherKey = otherPartyPublicKey as ECDiffieHellmanCngPublicKey;
if (otherPartyPublicKey == null)
{
throw new ArgumentException(SR.GetString(SR.Cryptography_ArgExpectedECDiffieHellmanCngPublicKey));
}
using (CngKey importedKey = otherKey.Import()) {
return(DeriveSecretAgreementHandle(importedKey));
}
}
/// <summary>
/// Given a second party's public key, derive shared key material
/// </summary>
public override byte[] DeriveKeyMaterial(ECDiffieHellmanPublicKey otherPartyPublicKey)
{
Contract.Ensures(Contract.Result <byte[]>() != null);
Contract.Assert(m_kdf >= ECDiffieHellmanKeyDerivationFunction.Hash &&
m_kdf <= ECDiffieHellmanKeyDerivationFunction.Tls);
if (otherPartyPublicKey == null)
{
throw new ArgumentNullException("otherPartyPublicKey");
}
// We can only work with ECDiffieHellmanCngPublicKeys
ECDiffieHellmanCngPublicKey otherKey = otherPartyPublicKey as ECDiffieHellmanCngPublicKey;
if (otherKey == null)
{
throw new ArgumentException(SR.GetString(SR.Cryptography_ArgExpectedECDiffieHellmanCngPublicKey));
}
using (CngKey import = otherKey.Import()) {
return(DeriveKeyMaterial(import));
}
}