public ElGamalKeyGenerationParameters(
SecureRandom random,
ElGamalParameters parameters)
: base(random, GetStrength(parameters))
{
this.parameters = parameters;
}
public ElGamalKeyGenerationParameters(
SecureRandom random,
ElGamalParameters parameters)
: base(random, GetStrength(parameters))
{
this.parameters = parameters;
}
protected ElGamalKeyParameters(
bool isPrivate,
ElGamalParameters parameters)
: base(isPrivate)
{
// TODO Should we allow 'parameters' to be null?
this.parameters = parameters;
}
protected ElGamalKeyParameters(
bool isPrivate,
ElGamalParameters parameters)
: base(isPrivate)
{
// TODO Should we allow 'parameters' to be null?
this.parameters = parameters;
}
public ElGamalPublicKeyParameters(
BigInteger y,
ElGamalParameters parameters)
: base(false, parameters)
{
if (y == null)
throw new ArgumentNullException("y");
this.y = y;
}
public ElGamalPrivateKeyParameters(
BigInteger x,
ElGamalParameters parameters)
: base(true, parameters)
{
if (x == null)
throw new ArgumentNullException("x");
this.x = x;
}
public ElGamalPublicKeyParameters(
BigInteger y,
ElGamalParameters parameters)
: base(false, parameters)
{
if (y == null)
{
throw new ArgumentNullException("y");
}
this.y = y;
}
public ElGamalPrivateKeyParameters(
BigInteger x,
ElGamalParameters parameters)
: base(true, parameters)
{
if (x == null)
{
throw new ArgumentNullException("x");
}
this.x = x;
}
public override bool Equals(
object obj)
{
if (obj == this)
{
return(true);
}
ElGamalParameters other = obj as ElGamalParameters;
if (other == null)
{
return(false);
}
return(Equals(other));
}
protected bool Equals(
ElGamalParameters other)
{
return(p.Equals(other.p) && g.Equals(other.g) && l == other.l);
}
protected bool Equals(
ElGamalParameters other)
{
return p.Equals(other.p) && g.Equals(other.g) && l == other.l;
}
internal static int GetStrength(
ElGamalParameters parameters)
{
return parameters.L != 0 ? parameters.L : parameters.P.BitLength;
}
/// <summary>Extract a <c>PgpPrivateKey</c> from this secret key's encrypted contents.</summary>
public PgpPrivateKey ExtractPrivateKey(
char[] passPhrase)
{
byte[] secKeyData = secret.GetSecretKeyData();
if (secKeyData == null || secKeyData.Length < 1)
return null;
PublicKeyPacket pubPk = secret.PublicKeyPacket;
try
{
byte[] data = ExtractKeyData(passPhrase);
BcpgInputStream bcpgIn = BcpgInputStream.Wrap(new MemoryStream(data, false));
AsymmetricKeyParameter privateKey;
switch (pubPk.Algorithm)
{
case PublicKeyAlgorithmTag.RsaEncrypt:
case PublicKeyAlgorithmTag.RsaGeneral:
case PublicKeyAlgorithmTag.RsaSign:
RsaPublicBcpgKey rsaPub = (RsaPublicBcpgKey)pubPk.Key;
RsaSecretBcpgKey rsaPriv = new RsaSecretBcpgKey(bcpgIn);
RsaPrivateCrtKeyParameters rsaPrivSpec = new RsaPrivateCrtKeyParameters(
rsaPriv.Modulus,
rsaPub.PublicExponent,
rsaPriv.PrivateExponent,
rsaPriv.PrimeP,
rsaPriv.PrimeQ,
rsaPriv.PrimeExponentP,
rsaPriv.PrimeExponentQ,
rsaPriv.CrtCoefficient);
privateKey = rsaPrivSpec;
break;
case PublicKeyAlgorithmTag.Dsa:
DsaPublicBcpgKey dsaPub = (DsaPublicBcpgKey)pubPk.Key;
DsaSecretBcpgKey dsaPriv = new DsaSecretBcpgKey(bcpgIn);
DsaParameters dsaParams = new DsaParameters(dsaPub.P, dsaPub.Q, dsaPub.G);
privateKey = new DsaPrivateKeyParameters(dsaPriv.X, dsaParams);
break;
case PublicKeyAlgorithmTag.ElGamalEncrypt:
case PublicKeyAlgorithmTag.ElGamalGeneral:
ElGamalPublicBcpgKey elPub = (ElGamalPublicBcpgKey)pubPk.Key;
ElGamalSecretBcpgKey elPriv = new ElGamalSecretBcpgKey(bcpgIn);
ElGamalParameters elParams = new ElGamalParameters(elPub.P, elPub.G);
privateKey = new ElGamalPrivateKeyParameters(elPriv.X, elParams);
break;
default:
throw new PgpException("unknown public key algorithm encountered");
}
return new PgpPrivateKey(privateKey, KeyId);
}
catch (PgpException e)
{
throw e;
}
catch (Exception e)
{
throw new PgpException("Exception constructing key", e);
}
}
internal static int GetStrength(
ElGamalParameters parameters)
{
return(parameters.L != 0 ? parameters.L : parameters.P.BitLength);
}
