diff options
Diffstat (limited to 'crypto/src/math/ec/ECPoint.cs')
| -rw-r--r-- | crypto/src/math/ec/ECPoint.cs | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/crypto/src/math/ec/ECPoint.cs b/crypto/src/math/ec/ECPoint.cs index dbeaf31aa..3e206e65f 100644 --- a/crypto/src/math/ec/ECPoint.cs +++ b/crypto/src/math/ec/ECPoint.cs @@ -67,6 +67,12 @@ namespace Org.BouncyCastle.Math.EC this.m_withCompression = withCompression; } + protected internal bool SatisfiesCofactor() + { + BigInteger h = Curve.Cofactor; + return h == null || h.Equals(BigInteger.One) || !ECAlgorithms.ReferenceMultiply(this, h).IsInfinity; + } + protected abstract bool SatisfiesCurveEquation(); public ECPoint GetDetachedPoint() @@ -304,12 +310,8 @@ namespace Org.BouncyCastle.Math.EC if (!SatisfiesCurveEquation()) return false; - BigInteger h = curve.Cofactor; - if (h != null && !h.Equals(BigInteger.One) - && ECAlgorithms.ReferenceMultiply(this, h).IsInfinity) - { + if (!SatisfiesCofactor()) return false; - } } return true; |