diff options
Diffstat (limited to 'crypto/src/math')
| -rw-r--r-- | crypto/src/math/ec/ECCurve.cs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/crypto/src/math/ec/ECCurve.cs b/crypto/src/math/ec/ECCurve.cs index fa2c72570..6ccd97e7b 100644 --- a/crypto/src/math/ec/ECCurve.cs +++ b/crypto/src/math/ec/ECCurve.cs @@ -96,6 +96,7 @@ namespace Org.BouncyCastle.Math.EC public abstract int FieldSize { get; } public abstract ECFieldElement FromBigInteger(BigInteger x); + public abstract bool IsValidFieldElement(BigInteger x); public virtual Config Configure() { @@ -477,6 +478,11 @@ namespace Org.BouncyCastle.Math.EC { } + public override bool IsValidFieldElement(BigInteger x) + { + return x != null && x.SignValue >= 0 && x.CompareTo(Field.Characteristic) < 0; + } + protected override ECPoint DecompressPoint(int yTilde, BigInteger X1) { ECFieldElement x = FromBigInteger(X1); @@ -670,6 +676,11 @@ namespace Org.BouncyCastle.Math.EC { } + public override bool IsValidFieldElement(BigInteger x) + { + return x != null && x.SignValue >= 0 && x.BitLength <= FieldSize; + } + [Obsolete("Per-point compression property will be removed")] public override ECPoint CreatePoint(BigInteger x, BigInteger y, bool withCompression) { |