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| author | Peter Dettman <peter.dettman@bouncycastle.org> | 2014-01-25 17:39:12 +0700 |
|---|---|---|
| committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2014-01-25 17:39:12 +0700 |
| commit | 91e9cac367d2f5bbcbd6023e971ca9e06629845c (patch) | |
| tree | 2c24a4458d754748f98a5af3ca46e7e0e2d70a94 /crypto/src/math | |
| parent | Use AesEngine by default (diff) | |
| download | BouncyCastle.NET-ed25519-91e9cac367d2f5bbcbd6023e971ca9e06629845c.tar.xz | |
Port of AddOne method(s) from Java
Diffstat (limited to 'crypto/src/math')
| -rw-r--r-- | crypto/src/math/ec/ECFieldElement.cs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/crypto/src/math/ec/ECFieldElement.cs b/crypto/src/math/ec/ECFieldElement.cs index c2754ada8..22cd1e0e8 100644 --- a/crypto/src/math/ec/ECFieldElement.cs +++ b/crypto/src/math/ec/ECFieldElement.cs @@ -11,6 +11,7 @@ namespace Org.BouncyCastle.Math.EC public abstract string FieldName { get; } public abstract int FieldSize { get; } public abstract ECFieldElement Add(ECFieldElement b); + public abstract ECFieldElement AddOne(); public abstract ECFieldElement Subtract(ECFieldElement b); public abstract ECFieldElement Multiply(ECFieldElement b); public abstract ECFieldElement Divide(ECFieldElement b); @@ -146,6 +147,16 @@ namespace Org.BouncyCastle.Math.EC return new FpFieldElement(q, r, ModAdd(x, b.ToBigInteger())); } + public override ECFieldElement AddOne() + { + BigInteger x2 = x.Add(BigInteger.One); + if (x2.CompareTo(q) == 0) + { + x2 = BigInteger.Zero; + } + return new FpFieldElement(q, r, x2); + } + public override ECFieldElement Subtract( ECFieldElement b) { @@ -1104,6 +1115,11 @@ namespace Org.BouncyCastle.Math.EC return new F2mFieldElement(m, ks, iarrClone); } + public override ECFieldElement AddOne() + { + return new F2mFieldElement(m, ks, x.AddOne()); + } + public override ECFieldElement Subtract( ECFieldElement b) { |