public X9ECParameters(ECCurve curve, X9ECPoint g, BigInteger n, BigInteger h, byte[] seed)
{
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
if (ECAlgorithms.IsFpCurve(curve))
{
this.fieldID = new X9FieldID(curve.Field.Characteristic);
}
else
{
if (!ECAlgorithms.IsF2mCurve(curve))
{
throw new ArgumentException("'curve' is of an unsupported type");
}
IPolynomialExtensionField field = (IPolynomialExtensionField)curve.Field;
int[] exponentsPresent = field.MinimalPolynomial.GetExponentsPresent();
if (exponentsPresent.Length == 3)
{
this.fieldID = new X9FieldID(exponentsPresent[2], exponentsPresent[1]);
}
else
{
if (exponentsPresent.Length != 5)
{
throw new ArgumentException("Only trinomial and pentomial curves are supported");
}
this.fieldID = new X9FieldID(exponentsPresent[4], exponentsPresent[1], exponentsPresent[2], exponentsPresent[3]);
}
}
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
BigInteger n,
BigInteger h,
byte[] seed)
{
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
// if (curve is FpCurve)
// {
// this.fieldID = new X9FieldID(X9ObjectIdentifiers.prime_field, ((FpCurve)curve).GetQ());
// }
// else
// {
// this.fieldID = new X9FieldID(X9ObjectIdentifiers.characteristic_two_field, null);
// }
if (curve is FpCurve)
{
this.fieldID = new X9FieldID(((FpCurve)curve).Q);
}
else if (curve is F2mCurve)
{
F2mCurve curveF2m = (F2mCurve)curve;
this.fieldID = new X9FieldID(curveF2m.M, curveF2m.K1,
curveF2m.K2, curveF2m.K3);
}
}
public X9ECParameters(Asn1Sequence seq)
{
if (!(seq[0] is DerInteger) || !((DerInteger)seq[0]).Value.Equals(BigInteger.One))
{
throw new ArgumentException("bad version in X9ECParameters");
}
X9Curve curve = new X9Curve(X9FieldID.GetInstance(seq[1]), Asn1Sequence.GetInstance(seq[2]));
this.curve = curve.Curve;
object obj2 = seq[3];
if (obj2 is X9ECPoint)
{
this.g = (X9ECPoint)obj2;
}
else
{
this.g = new X9ECPoint(this.curve, (Asn1OctetString)obj2);
}
this.n = ((DerInteger)seq[4]).Value;
this.seed = curve.GetSeed();
if (seq.Count == 6)
{
this.h = ((DerInteger)seq[5]).Value;
}
}
public X9ECParameters(Asn1Sequence seq)
{
//IL_0036: Unknown result type (might be due to invalid IL or missing references)
if (!(seq[0] is DerInteger) || !((DerInteger)seq[0]).Value.Equals(BigInteger.One))
{
throw new ArgumentException("bad version in X9ECParameters");
}
X9Curve x9Curve = new X9Curve(X9FieldID.GetInstance(seq[1]), Asn1Sequence.GetInstance(seq[2]));
curve = x9Curve.Curve;
object obj = seq[3];
if (obj is X9ECPoint)
{
g = (X9ECPoint)obj;
}
else
{
g = new X9ECPoint(curve, (Asn1OctetString)obj);
}
n = ((DerInteger)seq[4]).Value;
seed = x9Curve.GetSeed();
if (seq.Count == 6)
{
h = ((DerInteger)seq[5]).Value;
}
}
public X9Curve(
X9FieldID fieldID,
Asn1Sequence seq)
{
if (fieldID == null)
{
throw new ArgumentNullException("fieldID");
}
if (seq == null)
{
throw new ArgumentNullException("seq");
}
this.fieldIdentifier = fieldID.Identifier;
if (fieldIdentifier.Equals(X9ObjectIdentifiers.PrimeField))
{
BigInteger q = ((DerInteger)fieldID.Parameters).Value;
X9FieldElement x9A = new X9FieldElement(q, (Asn1OctetString)seq[0]);
X9FieldElement x9B = new X9FieldElement(q, (Asn1OctetString)seq[1]);
curve = new FpCurve(q, x9A.Value.ToBigInteger(), x9B.Value.ToBigInteger());
}
else
{
if (fieldIdentifier.Equals(X9ObjectIdentifiers.CharacteristicTwoField))
{
// Characteristic two field
DerSequence parameters = (DerSequence)fieldID.Parameters;
int m = ((DerInteger)parameters[0]).Value.IntValue;
DerObjectIdentifier representation
= (DerObjectIdentifier)parameters[1];
int k1 = 0;
int k2 = 0;
int k3 = 0;
if (representation.Equals(X9ObjectIdentifiers.TPBasis))
{
// Trinomial basis representation
k1 = ((DerInteger)parameters[2]).Value.IntValue;
}
else
{
// Pentanomial basis representation
DerSequence pentanomial = (DerSequence)parameters[2];
k1 = ((DerInteger)pentanomial[0]).Value.IntValue;
k2 = ((DerInteger)pentanomial[1]).Value.IntValue;
k3 = ((DerInteger)pentanomial[2]).Value.IntValue;
}
X9FieldElement x9A = new X9FieldElement(m, k1, k2, k3, (Asn1OctetString)seq[0]);
X9FieldElement x9B = new X9FieldElement(m, k1, k2, k3, (Asn1OctetString)seq[1]);
// TODO Is it possible to get the order (n) and cofactor(h) too?
curve = new F2mCurve(m, k1, k2, k3, x9A.Value.ToBigInteger(), x9B.Value.ToBigInteger());
}
}
if (seq.Count == 3)
{
seed = ((DerBitString)seq[2]).GetBytes();
}
}
public X9ECParameters(ECCurve curve, X9ECPoint g, BigInteger n, BigInteger h, byte[] seed)
{
//IL_00a5: Unknown result type (might be due to invalid IL or missing references)
//IL_00b0: Unknown result type (might be due to invalid IL or missing references)
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
if (ECAlgorithms.IsFpCurve(curve))
{
fieldID = new X9FieldID(curve.Field.Characteristic);
return;
}
if (ECAlgorithms.IsF2mCurve(curve))
{
IPolynomialExtensionField polynomialExtensionField = (IPolynomialExtensionField)curve.Field;
int[] exponentsPresent = polynomialExtensionField.MinimalPolynomial.GetExponentsPresent();
if (exponentsPresent.Length == 3)
{
fieldID = new X9FieldID(exponentsPresent[2], exponentsPresent[1]);
return;
}
if (exponentsPresent.Length == 5)
{
fieldID = new X9FieldID(exponentsPresent[4], exponentsPresent[1], exponentsPresent[2], exponentsPresent[3]);
return;
}
throw new ArgumentException("Only trinomial and pentomial curves are supported");
}
throw new ArgumentException("'curve' is of an unsupported type");
}
public X9ECParameters(
Asn1Sequence seq)
{
if (!(seq[0] is DerInteger) ||
!((DerInteger)seq[0]).HasValue(1))
{
throw new ArgumentException("bad version in X9ECParameters");
}
this.n = ((DerInteger)seq[4]).Value;
if (seq.Count == 6)
{
this.h = ((DerInteger)seq[5]).Value;
}
X9Curve x9c = new X9Curve(
X9FieldID.GetInstance(seq[1]), n, h,
Asn1Sequence.GetInstance(seq[2]));
this.curve = x9c.Curve;
object p = seq[3];
if (p is X9ECPoint)
{
this.g = (X9ECPoint)p;
}
else
{
this.g = new X9ECPoint(curve, (Asn1OctetString)p);
}
this.seed = x9c.GetSeed();
}
public X9Curve(
X9FieldID fieldID,
Asn1Sequence seq)
{
if (fieldID == null)
throw new ArgumentNullException("fieldID");
if (seq == null)
throw new ArgumentNullException("seq");
this.fieldIdentifier = fieldID.Identifier;
if (fieldIdentifier.Equals(X9ObjectIdentifiers.PrimeField))
{
BigInteger q = ((DerInteger) fieldID.Parameters).Value;
X9FieldElement x9A = new X9FieldElement(q, (Asn1OctetString) seq[0]);
X9FieldElement x9B = new X9FieldElement(q, (Asn1OctetString) seq[1]);
curve = new FpCurve(q, x9A.Value.ToBigInteger(), x9B.Value.ToBigInteger());
}
else
{
if (fieldIdentifier.Equals(X9ObjectIdentifiers.CharacteristicTwoField))
{
// Characteristic two field
DerSequence parameters = (DerSequence)fieldID.Parameters;
int m = ((DerInteger)parameters[0]).Value.IntValue;
DerObjectIdentifier representation
= (DerObjectIdentifier)parameters[1];
int k1 = 0;
int k2 = 0;
int k3 = 0;
if (representation.Equals(X9ObjectIdentifiers.TPBasis))
{
// Trinomial basis representation
k1 = ((DerInteger)parameters[2]).Value.IntValue;
}
else
{
// Pentanomial basis representation
DerSequence pentanomial = (DerSequence) parameters[2];
k1 = ((DerInteger) pentanomial[0]).Value.IntValue;
k2 = ((DerInteger) pentanomial[1]).Value.IntValue;
k3 = ((DerInteger) pentanomial[2]).Value.IntValue;
}
X9FieldElement x9A = new X9FieldElement(m, k1, k2, k3, (Asn1OctetString)seq[0]);
X9FieldElement x9B = new X9FieldElement(m, k1, k2, k3, (Asn1OctetString)seq[1]);
// TODO Is it possible to get the order (n) and cofactor(h) too?
curve = new F2mCurve(m, k1, k2, k3, x9A.Value.ToBigInteger(), x9B.Value.ToBigInteger());
}
}
if (seq.Count == 3)
{
seed = ((DerBitString) seq[2]).GetBytes();
}
}
public X9Curve(X9FieldID fieldID, Asn1Sequence seq)
{
//IL_000e: Unknown result type (might be due to invalid IL or missing references)
//IL_001c: Unknown result type (might be due to invalid IL or missing references)
if (fieldID == null)
{
throw new ArgumentNullException("fieldID");
}
if (seq == null)
{
throw new ArgumentNullException("seq");
}
fieldIdentifier = fieldID.Identifier;
if (fieldIdentifier.Equals(X9ObjectIdentifiers.PrimeField))
{
BigInteger value = ((DerInteger)fieldID.Parameters).Value;
X9FieldElement x9FieldElement = new X9FieldElement(value, (Asn1OctetString)seq[0]);
X9FieldElement x9FieldElement2 = new X9FieldElement(value, (Asn1OctetString)seq[1]);
curve = new FpCurve(value, x9FieldElement.Value.ToBigInteger(), x9FieldElement2.Value.ToBigInteger());
}
else if (fieldIdentifier.Equals(X9ObjectIdentifiers.CharacteristicTwoField))
{
DerSequence derSequence = (DerSequence)fieldID.Parameters;
int intValue = ((DerInteger)derSequence[0]).Value.IntValue;
DerObjectIdentifier derObjectIdentifier = (DerObjectIdentifier)derSequence[1];
int num = 0;
int k = 0;
int k2 = 0;
if (derObjectIdentifier.Equals(X9ObjectIdentifiers.TPBasis))
{
num = ((DerInteger)derSequence[2]).Value.IntValue;
}
else
{
DerSequence derSequence2 = (DerSequence)derSequence[2];
num = ((DerInteger)derSequence2[0]).Value.IntValue;
k = ((DerInteger)derSequence2[1]).Value.IntValue;
k2 = ((DerInteger)derSequence2[2]).Value.IntValue;
}
X9FieldElement x9FieldElement3 = new X9FieldElement(intValue, num, k, k2, (Asn1OctetString)seq[0]);
X9FieldElement x9FieldElement4 = new X9FieldElement(intValue, num, k, k2, (Asn1OctetString)seq[1]);
curve = new F2mCurve(intValue, num, k, k2, x9FieldElement3.Value.ToBigInteger(), x9FieldElement4.Value.ToBigInteger());
}
if (seq.Count == 3)
{
seed = ((DerBitString)seq[2]).GetBytes();
}
}
public X9Curve(X9FieldID fieldID, Asn1Sequence seq)
{
if (fieldID == null)
{
throw new ArgumentNullException("fieldID");
}
if (seq == null)
{
throw new ArgumentNullException("seq");
}
this.fieldIdentifier = fieldID.Identifier;
if (this.fieldIdentifier.Equals(X9ObjectIdentifiers.PrimeField))
{
BigInteger p = ((DerInteger)fieldID.Parameters).Value;
X9FieldElement element = new X9FieldElement(p, (Asn1OctetString)seq[0]);
X9FieldElement element2 = new X9FieldElement(p, (Asn1OctetString)seq[1]);
this.curve = new FpCurve(p, element.Value.ToBigInteger(), element2.Value.ToBigInteger());
}
else if (this.fieldIdentifier.Equals(X9ObjectIdentifiers.CharacteristicTwoField))
{
DerSequence parameters = (DerSequence)fieldID.Parameters;
int intValue = ((DerInteger)parameters[0]).Value.IntValue;
DerObjectIdentifier identifier = (DerObjectIdentifier)parameters[1];
int num2 = 0;
int num3 = 0;
int num4 = 0;
if (identifier.Equals(X9ObjectIdentifiers.TPBasis))
{
num2 = ((DerInteger)parameters[2]).Value.IntValue;
}
else
{
DerSequence sequence2 = (DerSequence)parameters[2];
num2 = ((DerInteger)sequence2[0]).Value.IntValue;
num3 = ((DerInteger)sequence2[1]).Value.IntValue;
num4 = ((DerInteger)sequence2[2]).Value.IntValue;
}
X9FieldElement element3 = new X9FieldElement(intValue, num2, num3, num4, (Asn1OctetString)seq[0]);
X9FieldElement element4 = new X9FieldElement(intValue, num2, num3, num4, (Asn1OctetString)seq[1]);
this.curve = new F2mCurve(intValue, num2, num3, num4, element3.Value.ToBigInteger(), element4.Value.ToBigInteger());
}
if (seq.Count == 3)
{
this.seed = ((DerBitString)seq[2]).GetBytes();
}
}
public X9Curve(X9FieldID fieldID, Asn1Sequence seq)
{
if (fieldID == null)
{
throw new ArgumentNullException("fieldID");
}
if (seq == null)
{
throw new ArgumentNullException("seq");
}
this.fieldIdentifier = fieldID.Identifier;
if (this.fieldIdentifier.Equals(X9ObjectIdentifiers.PrimeField))
{
BigInteger value = ((DerInteger)fieldID.Parameters).Value;
X9FieldElement x9FieldElement = new X9FieldElement(value, (Asn1OctetString)seq[0]);
X9FieldElement x9FieldElement2 = new X9FieldElement(value, (Asn1OctetString)seq[1]);
this.curve = new FpCurve(value, x9FieldElement.Value.ToBigInteger(), x9FieldElement2.Value.ToBigInteger());
}
else if (this.fieldIdentifier.Equals(X9ObjectIdentifiers.CharacteristicTwoField))
{
DerSequence derSequence = (DerSequence)fieldID.Parameters;
int intValue = ((DerInteger)derSequence[0]).Value.IntValue;
DerObjectIdentifier derObjectIdentifier = (DerObjectIdentifier)derSequence[1];
int k = 0;
int k2 = 0;
int intValue2;
if (derObjectIdentifier.Equals(X9ObjectIdentifiers.TPBasis))
{
intValue2 = ((DerInteger)derSequence[2]).Value.IntValue;
}
else
{
DerSequence derSequence2 = (DerSequence)derSequence[2];
intValue2 = ((DerInteger)derSequence2[0]).Value.IntValue;
k = ((DerInteger)derSequence2[1]).Value.IntValue;
k2 = ((DerInteger)derSequence2[2]).Value.IntValue;
}
X9FieldElement x9FieldElement3 = new X9FieldElement(intValue, intValue2, k, k2, (Asn1OctetString)seq[0]);
X9FieldElement x9FieldElement4 = new X9FieldElement(intValue, intValue2, k, k2, (Asn1OctetString)seq[1]);
this.curve = new F2mCurve(intValue, intValue2, k, k2, x9FieldElement3.Value.ToBigInteger(), x9FieldElement4.Value.ToBigInteger());
}
if (seq.Count == 3)
{
this.seed = ((DerBitString)seq[2]).GetBytes();
}
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
IBigInteger n,
IBigInteger h,
byte[] seed)
{
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
if (curve is FPCurve)
{
this.fieldID = new X9FieldID(((FPCurve)curve).Q);
}
else if (curve is F2MCurve)
{
F2MCurve curveF2m = (F2MCurve)curve;
this.fieldID = new X9FieldID(curveF2m.M, curveF2m.K1,
curveF2m.K2, curveF2m.K3);
}
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
BigInteger n,
BigInteger h,
byte[] seed)
{
this.curve = curve;
this.g = g.Normalize();
this.n = n;
this.h = h;
this.seed = seed;
if (ECAlgorithms.IsFpCurve(curve))
{
this.fieldID = new X9FieldID(curve.Field.Characteristic);
}
else if (ECAlgorithms.IsF2mCurve(curve))
{
IPolynomialExtensionField field = (IPolynomialExtensionField)curve.Field;
int[] exponents = field.MinimalPolynomial.GetExponentsPresent();
if (exponents.Length == 3)
{
this.fieldID = new X9FieldID(exponents[2], exponents[1]);
}
else if (exponents.Length == 5)
{
this.fieldID = new X9FieldID(exponents[4], exponents[1], exponents[2], exponents[3]);
}
else
{
throw new ArgumentException("Only trinomial and pentomial curves are supported");
}
}
else
{
throw new ArgumentException("'curve' is of an unsupported type");
}
}
public X9Curve(
X9FieldID fieldID,
BigInteger order,
BigInteger cofactor,
Asn1Sequence seq)
{
if (fieldID == null)
{
throw new ArgumentNullException("fieldID");
}
if (seq == null)
{
throw new ArgumentNullException("seq");
}
this.fieldIdentifier = fieldID.Identifier;
if (fieldIdentifier.Equals(X9ObjectIdentifiers.PrimeField))
{
BigInteger p = ((DerInteger)fieldID.Parameters).Value;
BigInteger A = new BigInteger(1, Asn1OctetString.GetInstance(seq[0]).GetOctets());
BigInteger B = new BigInteger(1, Asn1OctetString.GetInstance(seq[1]).GetOctets());
curve = new FpCurve(p, A, B, order, cofactor);
}
else if (fieldIdentifier.Equals(X9ObjectIdentifiers.CharacteristicTwoField))
{
// Characteristic two field
DerSequence parameters = (DerSequence)fieldID.Parameters;
int m = ((DerInteger)parameters[0]).Value.IntValue;
DerObjectIdentifier representation
= (DerObjectIdentifier)parameters[1];
int k1 = 0;
int k2 = 0;
int k3 = 0;
if (representation.Equals(X9ObjectIdentifiers.TPBasis))
{
// Trinomial basis representation
k1 = ((DerInteger)parameters[2]).Value.IntValue;
}
else
{
// Pentanomial basis representation
DerSequence pentanomial = (DerSequence)parameters[2];
k1 = ((DerInteger)pentanomial[0]).Value.IntValue;
k2 = ((DerInteger)pentanomial[1]).Value.IntValue;
k3 = ((DerInteger)pentanomial[2]).Value.IntValue;
}
BigInteger A = new BigInteger(1, Asn1OctetString.GetInstance(seq[0]).GetOctets());
BigInteger B = new BigInteger(1, Asn1OctetString.GetInstance(seq[1]).GetOctets());
curve = new F2mCurve(m, k1, k2, k3, A, B, order, cofactor);
}
else
{
throw new ArgumentException("This type of ECCurve is not implemented");
}
if (seq.Count == 3)
{
seed = ((DerBitString)seq[2]).GetBytes();
}
}
public X9Curve(
X9FieldID fieldID,
Asn1Sequence seq)
: this(fieldID, null, null, seq)
{
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
BigInteger n,
BigInteger h,
byte[] seed)
{
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
if (curve is FpCurve)
{
this.fieldID = new X9FieldID(((FpCurve) curve).Q);
}
else if (curve is F2mCurve)
{
F2mCurve curveF2m = (F2mCurve) curve;
this.fieldID = new X9FieldID(curveF2m.M, curveF2m.K1,
curveF2m.K2, curveF2m.K3);
}
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
BigInteger n,
BigInteger h,
byte[] seed)
{
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
// if (curve is FpCurve)
// {
// this.fieldID = new X9FieldID(X9ObjectIdentifiers.prime_field, ((FpCurve)curve).GetQ());
// }
// else
// {
// this.fieldID = new X9FieldID(X9ObjectIdentifiers.characteristic_two_field, null);
// }
if (curve is FpCurve)
{
this.fieldID = new X9FieldID(((FpCurve) curve).Q);
}
else if (curve is F2mCurve)
{
F2mCurve curveF2m = (F2mCurve) curve;
this.fieldID = new X9FieldID(curveF2m.M, curveF2m.K1,
curveF2m.K2, curveF2m.K3);
}
}
