1 files changed, 34 insertions, 0 deletions
diff --git a/crypto/src/math/ec/rfc7748/X448Field.cs b/crypto/src/math/ec/rfc7748/X448Field.cs
index ef4fd4627..6d8c60e78 100644
--- a/crypto/src/math/ec/rfc7748/X448Field.cs
+++ b/crypto/src/math/ec/rfc7748/X448Field.cs
@@ -46,6 +46,23 @@ namespace Org.BouncyCastle.Math.EC.Rfc7748
// }
//}
+ public static int AreEqual(uint[] x, uint[] y)
+ {
+ uint d = 0;
+ for (int i = 0; i < Size; ++i)
+ {
+ d |= x[i] ^ y[i];
+ }
+ d |= d >> 16;
+ d &= 0xFFFF;
+ return ((int)d - 1) >> 31;
+ }
+
+ public static bool AreEqualVar(uint[] x, uint[] y)
+ {
+ return 0 != AreEqual(x, y);
+ }
+
public static void Carry(uint[] z)
{
uint z0 = z[0], z1 = z[1], z2 = z[2], z3 = z[3], z4 = z[4], z5 = z[5], z6 = z[6], z7 = z[7];
@@ -285,6 +302,23 @@ namespace Org.BouncyCastle.Math.EC.Rfc7748
Decode(u, 0, z);
}
+ public static int IsOne(uint[] x)
+ {
+ uint d = x[0] ^ 1;
+ for (int i = 1; i < Size; ++i)
+ {
+ d |= x[i];
+ }
+ d |= d >> 16;
+ d &= 0xFFFF;
+ return ((int)d - 1) >> 31;
+ }
+
+ public static bool IsOneVar(uint[] x)
+ {
+ return 0 != IsOne(x);
+ }
+
public static int IsZero(uint[] x)
{
uint d = 0;
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