diff --git a/crypto/src/math/ec/custom/sec/SecP224R1FieldElement.cs b/crypto/src/math/ec/custom/sec/SecP224R1FieldElement.cs
index 3152f1bee..6837ca26e 100644
--- a/crypto/src/math/ec/custom/sec/SecP224R1FieldElement.cs
+++ b/crypto/src/math/ec/custom/sec/SecP224R1FieldElement.cs
@@ -132,6 +132,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
SecP224R1Field.Negate(c, nc);
uint[] r = Mod.Random(SecP224R1Field.P);
+ uint[] t = Nat224.Create();
for (;;)
{
@@ -140,7 +141,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
uint[] e1 = Nat224.Create();
e1[0] = 1;
uint[] f1 = Nat224.Create();
- RP(nc, d1, e1, f1);
+ RP(nc, d1, e1, f1, t);
uint[] d0 = Nat224.Create();
uint[] e0 = Nat224.Create();
@@ -150,7 +151,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
Nat224.Copy(d1, d0);
Nat224.Copy(e1, e0);
- RS(d1, e1, f1);
+ RS(d1, e1, f1, t);
if (Nat224.IsZero(d1))
{
@@ -192,9 +193,8 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return Q.GetHashCode() ^ Arrays.GetHashCode(x, 0, 7);
}
- private static void RM(uint[] nc, uint[] d0, uint[] e0, uint[] d1, uint[] e1, uint[] f1)
+ private static void RM(uint[] nc, uint[] d0, uint[] e0, uint[] d1, uint[] e1, uint[] f1, uint[] t)
{
- uint[] t = Nat224.Create();
SecP224R1Field.Multiply(e1, e0, t);
SecP224R1Field.Multiply(t, nc, t);
SecP224R1Field.Multiply(d1, d0, f1);
@@ -207,7 +207,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
SecP224R1Field.Multiply(f1, nc, f1);
}
- private static void RP(uint[] nc, uint[] d1, uint[] e1, uint[] f1)
+ private static void RP(uint[] nc, uint[] d1, uint[] e1, uint[] f1, uint[] t)
{
Nat224.Copy(nc, f1);
@@ -222,20 +222,19 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
int j = 1 << i;
while (--j >= 0)
{
- RS(d1, e1, f1);
+ RS(d1, e1, f1, t);
}
- RM(nc, d0, e0, d1, e1, f1);
+ RM(nc, d0, e0, d1, e1, f1, t);
}
}
- private static void RS(uint[] d, uint[] e, uint[] f)
+ private static void RS(uint[] d, uint[] e, uint[] f, uint[] t)
{
SecP224R1Field.Multiply(e, d, e);
- uint[] t = Nat224.Create();
+ SecP224R1Field.Twice(e, e);
SecP224R1Field.Square(d, t);
SecP224R1Field.Add(f, t, d);
- SecP224R1Field.Twice(e, e);
SecP224R1Field.Multiply(f, t, f);
uint c = Nat.ShiftUpBits(7, f, 2, 0);
SecP224R1Field.Reduce32(c, f);
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