/// <summary>
/// Return an ASN.1 encoded representation of the implementing key in a SubjectPublicKeyInfo structure.
/// </summary>
/// <returns>An encoded representation of the key.</returns>
public override byte[] GetEncoded()
{
DHDomainParameters dhParams = this.DomainParameters;
if (publicKeyInfo != null)
{
return(KeyUtils.GetEncodedInfo(publicKeyInfo));
}
if (dhParams.Q == null)
{
if (Algorithm.Name.StartsWith("ELGAMAL"))
{
return(KeyUtils.GetEncodedSubjectPublicKeyInfo(new AlgorithmIdentifier(OiwObjectIdentifiers.ElGamalAlgorithm, new ElGamalParameter(dhParams.P, dhParams.G)), new DerInteger(mY)));
}
return(KeyUtils.GetEncodedSubjectPublicKeyInfo(new AlgorithmIdentifier(PkcsObjectIdentifiers.DhKeyAgreement, new DHParameter(dhParams.P, dhParams.G, dhParams.L)), new DerInteger(mY)));
}
else
{
DHValidationParameters validationParameters = dhParams.ValidationParameters;
if (validationParameters != null)
{
return(KeyUtils.GetEncodedSubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.DHPublicNumber, new Asn1.X9.DHDomainParameters(dhParams.P, dhParams.G, dhParams.Q, dhParams.J,
new DHValidationParms(validationParameters.GetSeed(), BigInteger.ValueOf(validationParameters.Counter)))), new DerInteger(mY)));
}
else
{
return(KeyUtils.GetEncodedSubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.DHPublicNumber, new Asn1.X9.DHDomainParameters(dhParams.P, dhParams.G, dhParams.Q, dhParams.J, null)), new DerInteger(mY)));
}
}
}
public bool Equals(
object obj)
{
if (!(obj is DHDomainParameters))
{
return(false);
}
DHDomainParameters pm = (DHDomainParameters)obj;
return(pm.P.Equals(p) && pm.G.Equals(g));
}
internal static BigInteger Validated(DHDomainParameters dhParams, BigInteger y)
{
if (dhParams.Q != null)
{
// "SP 800-56A ASSURANCES", "The module is performing SP 800-56A Assurances self-test"
// "CONDITIONAL TEST", "SP 800-56A ASSURANCES CHECK", "Invoke SP 800-56A Assurances test"
if (BigInteger.One.Equals(y.ModPow(dhParams.Q, dhParams.P)))
{
// "SP 800-56A ASSURANCES CHECK", "CONDITIONAL TEST", "SP 800-56A Assurances test successful"
return(y);
}
// "SP 800-56A ASSURANCES CHECK", "CONDITIONAL TEST", "SP 800-56A Assurances test failed"
throw new ArgumentException("Y value does not appear to be in correct group");
}
else
{
return(y); // we can't validate without Q.
}
}
public AsymmetricDHPublicKey(Algorithm algorithm, DHDomainParameters parameters, BigInteger y)
: base(algorithm, parameters)
{
this.mY = KeyUtils.Validated(parameters, y);
}
/// <summary>
/// Base constructor for a Diffie-Hellman private key.
/// </summary>
/// <param name="algorithm">The algorithm marker for this key.</param>
/// <param name="parameters">The domain parameters for this key.</param>
/// <param name="x">The private X value for this key.</param>
public AsymmetricDHPrivateKey(Algorithm algorithm, DHDomainParameters parameters, BigInteger x)
: base(algorithm, parameters)
{
this.x = x;
this.hashCode = CalculateHashCode();
}
private void checkKeyPairForConsistency(TPub publicKey, TPriv privateKey)
{
if (publicKey is AsymmetricECKey && privateKey is AsymmetricECKey)
{
AsymmetricECPrivateKey priv = privateKey as AsymmetricECPrivateKey;
AsymmetricECPublicKey pub = publicKey as AsymmetricECPublicKey;
if (!priv.DomainParameters.Equals(pub.DomainParameters))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("EC keys do not have the same domain parameters");
}
if (!priv.DomainParameters.G.Multiply(priv.S).Normalize().Equals(pub.W))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("EC public key not consistent with EC private key");
}
}
else if (publicKey is AsymmetricDsaKey && privateKey is AsymmetricDsaKey)
{
AsymmetricDsaPrivateKey priv = privateKey as AsymmetricDsaPrivateKey;
AsymmetricDsaPublicKey pub = publicKey as AsymmetricDsaPublicKey;
DsaDomainParameters dsaParameters = priv.DomainParameters;
if (!dsaParameters.Equals(pub.DomainParameters))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("DSA keys do not have the same domain parameters");
}
if (!dsaParameters.G.ModPow(priv.X, dsaParameters.P).Equals(pub.Y))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("DSA public key not consistent with DSA private key");
}
}
else if (publicKey is AsymmetricRsaKey && privateKey is AsymmetricRsaKey)
{
AsymmetricRsaPrivateKey priv = privateKey as AsymmetricRsaPrivateKey;
AsymmetricRsaPublicKey pub = publicKey as AsymmetricRsaPublicKey;
if (!priv.Modulus.Equals(pub.Modulus))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("RSA keys do not have the same modulus");
}
BigInteger val = BigInteger.Two;
if (!val.ModPow(priv.PrivateExponent, priv.Modulus).ModPow(pub.PublicExponent, priv.Modulus).Equals(val))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("RSA public key not consistent with RSA private key");
}
}
else if (publicKey is AsymmetricDHKey && privateKey is AsymmetricDHKey)
{
AsymmetricDHPrivateKey priv = privateKey as AsymmetricDHPrivateKey;
AsymmetricDHPublicKey pub = publicKey as AsymmetricDHPublicKey;
DHDomainParameters dhParameters = priv.DomainParameters;
if (!dhParameters.Equals(pub.DomainParameters))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("DH keys do not have the same domain parameters");
}
if (!dhParameters.G.ModPow(priv.X, dhParameters.P).Equals(pub.Y))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("DH public key not consistent with DH private key");
}
}
else if (publicKey is AsymmetricSphincsKey && privateKey is AsymmetricSphincsKey)
{
AsymmetricSphincsPrivateKey priv = privateKey as AsymmetricSphincsPrivateKey;
AsymmetricSphincsPublicKey pub = publicKey as AsymmetricSphincsPublicKey;
if (priv.TreeDigestAlgorithm != pub.TreeDigestAlgorithm)
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("Sphincs256 public key not consistent with Sphincs256 private key");
}
if (!IsRangeSame(priv.GetKeyData(), SPHINCS256Config.SEED_BYTES, pub.GetKeyData(), 0, Horst.N_MASKS * SPHINCS256Config.HASH_BYTES))
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("Sphincs256 public key not consistent with Sphincs256 private key");
}
}
else if (publicKey is AsymmetricNHKey && privateKey is AsymmetricNHKey)
{
AsymmetricNHPrivateKey priv = privateKey as AsymmetricNHPrivateKey;
AsymmetricNHPublicKey pub = publicKey as AsymmetricNHPublicKey;
// currently there doesn't either a good approach or much point to this one as the keys should be ephemeral and always generated locally.
}
else
{
// FSM_TRANS:5.IKP.2, "IMPORTED KEY PAIR CONSISTENCY TEST", "USER COMMAND REJECTED", "Consistency test on imported key pair failed"
throw new ArgumentException("Key pair inconsistent");
}
}
internal AsymmetricDHKey(Algorithm algorithm, AlgorithmIdentifier algorithmIdentifier)
{
this.approvedModeOnly = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.algorithm = algorithm;
this.domainParameters = DecodeDomainParameters(algorithmIdentifier);
}
internal AsymmetricDHKey(Algorithm algorithm, DHDomainParameters domainParameters)
{
this.approvedModeOnly = CryptoServicesRegistrar.IsInApprovedOnlyMode();
this.algorithm = algorithm;
this.domainParameters = domainParameters;
}