public void ImportPrivateKey()
{
IExchangeKey aliceKey = null;
IExchangeKey bobKey = null;
byte[] firstPassDerivedKey = null;
using (var alice = new BCryptDiffieHellmanOakleyGroup14())
using (var bob = new BCryptDiffieHellmanOakleyGroup14())
{
aliceKey = alice.PrivateKey;
bobKey = bob.PrivateKey;
alice.ImportPartnerKey(bob.PublicKey);
bob.ImportPartnerKey(alice.PublicKey);
AssertKeysAgree(alice, bob);
firstPassDerivedKey = alice.GenerateAgreement().ToArray();
}
using (var alice = BCryptDiffieHellman.Import(aliceKey))
using (var bob = BCryptDiffieHellman.Import(bobKey))
{
alice.ImportPartnerKey(bob.PublicKey);
bob.ImportPartnerKey(alice.PublicKey);
var aliceDerived = alice.GenerateAgreement();
AssertKeysAgree(alice, bob);
Assert.IsTrue(aliceDerived.Span.SequenceEqual(firstPassDerivedKey));
}
}
public IExchangeKey CacheKey(IExchangeKey key)
{
key.CacheExpiry = DateTimeOffset.UtcNow.AddMinutes(60);
keyCache[key.Algorithm] = key;
return(key);
}
public Task <IExchangeKey> CacheKey(IExchangeKey key)
{
key.CacheExpiry = DateTimeOffset.UtcNow.AddMinutes(60);
keyCache[key.Algorithm] = key;
return(Task.FromResult(key));
}
public override IKeyAgreement DiffieHellmanModp14(IExchangeKey privateKey)
{
if (privateKey != null)
{
BCryptDiffieHellman.Import(privateKey);
}
return(DiffieHellmanModp14());
}
public override IKeyAgreement DiffieHellmanModp2(IExchangeKey privateKey)
{
if (privateKey != null)
{
return(BCryptDiffieHellman.Import(privateKey));
}
return(this.DiffieHellmanModp2());
}
public void ImportPartnerKey(IExchangeKey publicKey)
{
if (publicKey == null)
{
throw new ArgumentNullException(nameof(publicKey));
}
this.partnerKey = ParseBigInteger(publicKey.PublicComponent, true);
}
public void ImportPartnerKey(IExchangeKey incoming)
{
if (incoming is not DiffieHellmanKey key || key is null)
{
throw new ArgumentNullException(nameof(incoming));
}
this.ImportKey(key, ref this.hPublicKey);
}
private static void AssertKeysMatch(IExchangeKey a, IExchangeKey b)
{
var alice = a as DiffieHellmanKey;
var bob = b as DiffieHellmanKey;
Assert.IsTrue(alice.Modulus.Span.SequenceEqual(bob.Modulus.Span));
Assert.IsTrue(alice.Generator.Span.SequenceEqual(bob.Generator.Span));
Assert.IsTrue(alice.Factor.Span.SequenceEqual(bob.Factor.Span));
Assert.IsTrue(alice.PublicComponent.Span.SequenceEqual(bob.PublicComponent.Span));
Assert.IsTrue(alice.PrivateComponent.Span.SequenceEqual(bob.PrivateComponent.Span));
}
private static IExchangeKey GetRightPublicKey(IExchangeKey a, IExchangeKey b)
{
var left = a as DiffieHellmanKey;
var right = b as DiffieHellmanKey;
var pub = right.PublicComponent.ToArray();
var key = new DiffieHellmanKey
{
KeyLength = left.Modulus.Length,
Modulus = left.Modulus.ToArray(),
Generator = left.Generator.ToArray(),
PublicComponent = pub
};
return(key);
}
public static BCryptDiffieHellman Import(IExchangeKey key)
{
return(new BCryptDiffieHellman((DiffieHellmanKey)key));
}
public void ImportPartnerKey(IExchangeKey incoming)
{
ImportKey(incoming as DiffieHellmanKey, ref hPublicKey);
}
public override IKeyAgreement DiffieHellmanModp14(IExchangeKey privateKey) => throw PlatformNotSupported("DH-MODP-14");
public abstract IKeyAgreement DiffieHellmanModp14(IExchangeKey privateKey);
public void ImportPartnerKey(IExchangeKey publicKey)
{
this.partnerKey = ParseBigInteger(publicKey.Public, true);
}