1 files changed, 9 insertions, 1 deletions
diff --git a/crypto/src/math/ec/ECFieldElement.cs b/crypto/src/math/ec/ECFieldElement.cs
index 22cd1e0e8..ac9c62807 100644
--- a/crypto/src/math/ec/ECFieldElement.cs
+++ b/crypto/src/math/ec/ECFieldElement.cs
@@ -1166,7 +1166,15 @@ namespace Org.BouncyCastle.Math.EC
public override ECFieldElement Sqrt()
{
- throw new ArithmeticException("Not implemented");
+ LongArray root = this.x;
+ if (root.IsOne() || root.IsZero())
+ return this;
+
+ for (int i = 1; i < m; ++i)
+ {
+ root = root.ModSquare(m, ks);
+ }
+ return new F2mFieldElement(m, ks, root);
}
/**
|
