protected override BitString ComputeSharedSecret(ISecretKeyingMaterial otherPartyKeyingMaterial)
{
var domainParameters = (EccDomainParameters)ThisPartyKeyingMaterial.DomainParameters;
// static secret composed of both parties static key parts
var staticSecret = _diffieHellman.GenerateSharedSecretZ(
domainParameters,
(EccKeyPair)ThisPartyKeyingMaterial.StaticKeyPair,
(EccKeyPair)otherPartyKeyingMaterial.StaticKeyPair
).SharedSecretZ;
// differing ephemeralSecret logic depending on key agreement role
BitString ephemeralSecret;
if (SchemeParameters.KeyAgreementRole == KeyAgreementRole.InitiatorPartyU)
{
ephemeralSecret = _diffieHellman.GenerateSharedSecretZ(
domainParameters,
(EccKeyPair)ThisPartyKeyingMaterial.EphemeralKeyPair,
(EccKeyPair)otherPartyKeyingMaterial.StaticKeyPair
).SharedSecretZ;
}
else
{
ephemeralSecret = _diffieHellman.GenerateSharedSecretZ(
domainParameters,
(EccKeyPair)ThisPartyKeyingMaterial.StaticKeyPair,
(EccKeyPair)otherPartyKeyingMaterial.EphemeralKeyPair
).SharedSecretZ;
}
// Shared secret is composed (Z_e || Z_s)
return(BitString.ConcatenateBits(ephemeralSecret, staticSecret));
}
protected override BitString ComputeSharedSecret(OtherPartySharedInformation <EccDomainParameters, EccKeyPair> otherPartyInformation)
{
// static secret composed of both parties static key parts
var staticSecret = _diffieHellman.GenerateSharedSecretZ(
DomainParameters,
StaticKeyPair,
otherPartyInformation.StaticPublicKey
).SharedSecretZ;
// differing ephemeralSecret logic depending on key agreement role
BitString ephemeralSecret;
if (SchemeParameters.KeyAgreementRole == KeyAgreementRole.InitiatorPartyU)
{
ephemeralSecret = _diffieHellman.GenerateSharedSecretZ(
DomainParameters,
EphemeralKeyPair,
otherPartyInformation.StaticPublicKey
).SharedSecretZ;
}
else
{
ephemeralSecret = _diffieHellman.GenerateSharedSecretZ(
DomainParameters,
StaticKeyPair,
otherPartyInformation.EphemeralPublicKey
).SharedSecretZ;
}
// Shared secret is composed (Z_e || Z_s)
return(BitString.ConcatenateBits(ephemeralSecret, staticSecret));
}
protected override BitString ComputeSharedSecret(OtherPartySharedInformation <FfcDomainParameters, FfcKeyPair> otherPartyInformation)
{
if (SchemeParameters.KeyAgreementRole == KeyAgreementRole.InitiatorPartyU)
{
return(_diffieHellman.GenerateSharedSecretZ(
DomainParameters,
EphemeralKeyPair,
otherPartyInformation.StaticPublicKey
).SharedSecretZ);
}
return(_diffieHellman.GenerateSharedSecretZ(
DomainParameters,
StaticKeyPair,
otherPartyInformation.EphemeralPublicKey
).SharedSecretZ);
}
protected override BitString ComputeSharedSecret(OtherPartySharedInformation <FfcDomainParameters, FfcKeyPair> otherPartyInformation)
{
var staticSecret = _diffieHellman.GenerateSharedSecretZ(
DomainParameters,
StaticKeyPair,
otherPartyInformation.StaticPublicKey
).SharedSecretZ;
var ephemeralSecret = _diffieHellman.GenerateSharedSecretZ(
DomainParameters,
EphemeralKeyPair,
otherPartyInformation.EphemeralPublicKey
).SharedSecretZ;
// Shared secret is composed (Z_e || Z_s)
return(BitString.ConcatenateBits(ephemeralSecret, staticSecret));
}
protected override BitString ComputeSharedSecret(ISecretKeyingMaterial otherPartyKeyingMaterial)
{
if (SchemeParameters.KeyAgreementRole == KeyAgreementRole.InitiatorPartyU)
{
return(_diffieHellman.GenerateSharedSecretZ(
(FfcDomainParameters)ThisPartyKeyingMaterial.DomainParameters,
(FfcKeyPair)ThisPartyKeyingMaterial.EphemeralKeyPair,
(FfcKeyPair)otherPartyKeyingMaterial.StaticKeyPair
).SharedSecretZ);
}
return(_diffieHellman.GenerateSharedSecretZ(
(FfcDomainParameters)ThisPartyKeyingMaterial.DomainParameters,
(FfcKeyPair)ThisPartyKeyingMaterial.StaticKeyPair,
(FfcKeyPair)otherPartyKeyingMaterial.EphemeralKeyPair
).SharedSecretZ);
}
protected override BitString ComputeSharedSecret(ISecretKeyingMaterial otherPartyKeyingMaterial)
{
return(_diffieHellman.GenerateSharedSecretZ(
(EccDomainParameters)ThisPartyKeyingMaterial.DomainParameters,
(EccKeyPair)ThisPartyKeyingMaterial.StaticKeyPair,
(EccKeyPair)otherPartyKeyingMaterial.StaticKeyPair
).SharedSecretZ);
}
protected override BitString ComputeSharedSecret(OtherPartySharedInformation <EccDomainParameters, EccKeyPair> otherPartyInformation)
{
return(_diffieHellman.GenerateSharedSecretZ(
DomainParameters,
StaticKeyPair,
otherPartyInformation.StaticPublicKey
).SharedSecretZ);
}
/// <inheritdoc />
/// <summary>
/// Generates the shared secret.
/// Shared secret Z is made up of this party's private key along with the other parties public key,
/// run through the DiffieHellman primitive.
/// </summary>
/// <param name="otherPartyInformation"></param>
/// <returns></returns>
protected override BitString ComputeSharedSecret(OtherPartySharedInformation<FfcDomainParameters, FfcKeyPair> otherPartyInformation)
{
return _diffieHellman.GenerateSharedSecretZ(
DomainParameters,
EphemeralKeyPair,
otherPartyInformation.EphemeralPublicKey
).SharedSecretZ;
}
protected override BitString ComputeSharedSecret(ISecretKeyingMaterial otherPartyKeyingMaterial)
{
var domainParameters = (EccDomainParameters)ThisPartyKeyingMaterial.DomainParameters;
var staticSecret = _diffieHellman.GenerateSharedSecretZ(
domainParameters,
(EccKeyPair)ThisPartyKeyingMaterial.StaticKeyPair,
(EccKeyPair)otherPartyKeyingMaterial.StaticKeyPair
).SharedSecretZ;
var ephemeralSecret = _diffieHellman.GenerateSharedSecretZ(
domainParameters,
(EccKeyPair)ThisPartyKeyingMaterial.EphemeralKeyPair,
(EccKeyPair)otherPartyKeyingMaterial.EphemeralKeyPair
).SharedSecretZ;
// Shared secret is composed (Z_e || Z_s)
return(BitString.ConcatenateBits(ephemeralSecret, staticSecret));
}
public SharedSecretResponse GenerateSharedSecret(EccDomainParameters domainParameters, EccKeyPair privateKeyPartyA, EccKeyPair publicKeyPartyB)
{
return(_diffieHellman.GenerateSharedSecretZ(domainParameters, privateKeyPartyA, publicKeyPartyB));
}