diff --git a/crypto/src/math/ec/custom/sec/Nat192.cs b/crypto/src/math/ec/custom/sec/Nat192.cs
index 35bf75445..15053bb32 100644
--- a/crypto/src/math/ec/custom/sec/Nat192.cs
+++ b/crypto/src/math/ec/custom/sec/Nat192.cs
@@ -83,27 +83,56 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return (uint)c;
}
- public static uint AddToExt(uint[] x, int xOff, uint[] zz, int zzOff)
+ public static uint AddTo(uint[] x, int xOff, uint[] z, int zOff, uint cIn)
+ {
+ ulong c = cIn;
+ c += (ulong)x[xOff + 0] + z[zOff + 0];
+ z[zOff + 0] = (uint)c;
+ c >>= 32;
+ c += (ulong)x[xOff + 1] + z[zOff + 1];
+ z[zOff + 1] = (uint)c;
+ c >>= 32;
+ c += (ulong)x[xOff + 2] + z[zOff + 2];
+ z[zOff + 2] = (uint)c;
+ c >>= 32;
+ c += (ulong)x[xOff + 3] + z[zOff + 3];
+ z[zOff + 3] = (uint)c;
+ c >>= 32;
+ c += (ulong)x[xOff + 4] + z[zOff + 4];
+ z[zOff + 4] = (uint)c;
+ c >>= 32;
+ c += (ulong)x[xOff + 5] + z[zOff + 5];
+ z[zOff + 5] = (uint)c;
+ c >>= 32;
+ return (uint)c;
+ }
+
+ public static uint AddToEachOther(uint[] u, int uOff, uint[] v, int vOff)
{
- Debug.Assert(zzOff <= 6);
ulong c = 0;
- c += (ulong)x[xOff + 0] + zz[zzOff + 0];
- zz[zzOff + 0] = (uint)c;
+ c += (ulong)u[uOff + 0] + v[vOff + 0];
+ u[uOff + 0] = (uint)c;
+ v[vOff + 0] = (uint)c;
c >>= 32;
- c += (ulong)x[xOff + 1] + zz[zzOff + 1];
- zz[zzOff + 1] = (uint)c;
+ c += (ulong)u[uOff + 1] + v[vOff + 1];
+ u[uOff + 1] = (uint)c;
+ v[vOff + 1] = (uint)c;
c >>= 32;
- c += (ulong)x[xOff + 2] + zz[zzOff + 2];
- zz[zzOff + 2] = (uint)c;
+ c += (ulong)u[uOff + 2] + v[vOff + 2];
+ u[uOff + 2] = (uint)c;
+ v[vOff + 2] = (uint)c;
c >>= 32;
- c += (ulong)x[xOff + 3] + zz[zzOff + 3];
- zz[zzOff + 3] = (uint)c;
+ c += (ulong)u[uOff + 3] + v[vOff + 3];
+ u[uOff + 3] = (uint)c;
+ v[vOff + 3] = (uint)c;
c >>= 32;
- c += (ulong)x[xOff + 4] + zz[zzOff + 4];
- zz[zzOff + 4] = (uint)c;
+ c += (ulong)u[uOff + 4] + v[vOff + 4];
+ u[uOff + 4] = (uint)c;
+ v[vOff + 4] = (uint)c;
c >>= 32;
- c += (ulong)x[xOff + 5] + zz[zzOff + 5];
- zz[zzOff + 5] = (uint)c;
+ c += (ulong)u[uOff + 5] + v[vOff + 5];
+ u[uOff + 5] = (uint)c;
+ v[vOff + 5] = (uint)c;
c >>= 32;
return (uint)c;
}
@@ -126,6 +155,16 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return c == 0 ? 0 : IncExt(zz, zzOff + 1);
}
+ public static void Copy(uint[] x, uint[] z)
+ {
+ z[0] = x[0];
+ z[1] = x[1];
+ z[2] = x[2];
+ z[3] = x[3];
+ z[4] = x[4];
+ z[5] = x[5];
+ }
+
public static uint[] Create()
{
return new uint[6];
@@ -162,6 +201,20 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return -1;
}
+ public static bool Diff(uint[] x, int xOff, uint[] y, int yOff, uint[] z, int zOff)
+ {
+ bool pos = Gte(x, xOff, y, yOff);
+ if (pos)
+ {
+ Sub(x, xOff, y, yOff, z, zOff);
+ }
+ else
+ {
+ Sub(y, yOff, x, xOff, z, zOff);
+ }
+ return pos;
+ }
+
public static uint[] FromBigInteger(BigInteger x)
{
if (x.SignValue < 0 || x.BitLength > 192)
@@ -205,6 +258,19 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return true;
}
+ public static bool Gte(uint[] x, int xOff, uint[] y, int yOff)
+ {
+ for (int i = 5; i >= 0; --i)
+ {
+ uint x_i = x[xOff + i], y_i = y[yOff + i];
+ if (x_i < y_i)
+ return false;
+ if (x_i > y_i)
+ return true;
+ }
+ return true;
+ }
+
public static bool GteExt(uint[] xx, uint[] yy)
{
for (int i = 11; i >= 0; --i)
@@ -341,6 +407,64 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
}
}
+ public static void Mul(uint[] x, int xOff, uint[] y, int yOff, uint[] zz, int zzOff)
+ {
+ ulong y_0 = y[yOff + 0];
+ ulong y_1 = y[yOff + 1];
+ ulong y_2 = y[yOff + 2];
+ ulong y_3 = y[yOff + 3];
+ ulong y_4 = y[yOff + 4];
+ ulong y_5 = y[yOff + 5];
+
+ {
+ ulong c = 0, x_0 = x[xOff + 0];
+ c += x_0 * y_0;
+ zz[zzOff + 0] = (uint)c;
+ c >>= 32;
+ c += x_0 * y_1;
+ zz[zzOff + 1] = (uint)c;
+ c >>= 32;
+ c += x_0 * y_2;
+ zz[zzOff + 2] = (uint)c;
+ c >>= 32;
+ c += x_0 * y_3;
+ zz[zzOff + 3] = (uint)c;
+ c >>= 32;
+ c += x_0 * y_4;
+ zz[zzOff + 4] = (uint)c;
+ c >>= 32;
+ c += x_0 * y_5;
+ zz[zzOff + 5] = (uint)c;
+ c >>= 32;
+ zz[zzOff + 6] = (uint)c;
+ }
+
+ for (int i = 1; i < 6; ++i)
+ {
+ ++zzOff;
+ ulong c = 0, x_i = x[xOff + i];
+ c += x_i * y_0 + zz[zzOff + 0];
+ zz[zzOff + 0] = (uint)c;
+ c >>= 32;
+ c += x_i * y_1 + zz[zzOff + 1];
+ zz[zzOff + 1] = (uint)c;
+ c >>= 32;
+ c += x_i * y_2 + zz[zzOff + 2];
+ zz[zzOff + 2] = (uint)c;
+ c >>= 32;
+ c += x_i * y_3 + zz[zzOff + 3];
+ zz[zzOff + 3] = (uint)c;
+ c >>= 32;
+ c += x_i * y_4 + zz[zzOff + 4];
+ zz[zzOff + 4] = (uint)c;
+ c >>= 32;
+ c += x_i * y_5 + zz[zzOff + 5];
+ zz[zzOff + 5] = (uint)c;
+ c >>= 32;
+ zz[zzOff + 6] = (uint)c;
+ }
+ }
+
public static ulong Mul33Add(uint w, uint[] x, int xOff, uint[] y, int yOff, uint[] z, int zOff)
{
Debug.Assert(w >> 31 == 0);
@@ -529,6 +653,17 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return c >> 31;
}
+ public static uint ShiftUpBit(uint[] x, int xOff, int xLen, uint c)
+ {
+ for (int i = 0; i < xLen; ++i)
+ {
+ uint next = x[xOff + i];
+ x[xOff + i] = (next << 1) | (c >> 31);
+ c = next;
+ }
+ return c >> 31;
+ }
+
public static uint ShiftUpBit(uint[] x, uint c, uint[] z)
{
for (int i = 0; i < 6; ++i)
@@ -636,6 +771,102 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
ShiftUpBit(zz, 12, (uint)x_0 << 31);
}
+ public static void Square(uint[] x, int xOff, uint[] zz, int zzOff)
+ {
+ ulong x_0 = x[xOff + 0];
+ ulong zz_1;
+
+ {
+ uint c = 0;
+ int i = 5, j = 12;
+ do
+ {
+ ulong xVal = x[xOff + i--];
+ ulong p = xVal * xVal;
+ zz[zzOff + --j] = (c << 31) | (uint)(p >> 33);
+ zz[zzOff + --j] = (uint)(p >> 1);
+ c = (uint)p;
+ }
+ while (i > 0);
+
+ {
+ ulong p = x_0 * x_0;
+ zz_1 = (ulong)(c << 31) | (p >> 33);
+ zz[zzOff + 0] = (uint)(p >> 1);
+ }
+ }
+
+ ulong x_1 = x[xOff + 1];
+ ulong zz_2 = zz[zzOff + 2];
+
+ {
+ zz_1 += x_1 * x_0;
+ zz[zzOff + 1] = (uint)zz_1;
+ zz_2 += zz_1 >> 32;
+ }
+
+ ulong x_2 = x[xOff + 2];
+ ulong zz_3 = zz[zzOff + 3];
+ ulong zz_4 = zz[zzOff + 4];
+ {
+ zz_2 += x_2 * x_0;
+ zz[zzOff + 2] = (uint)zz_2;
+ zz_3 += (zz_2 >> 32) + x_2 * x_1;
+ zz_4 += zz_3 >> 32;
+ zz_3 &= M;
+ }
+
+ ulong x_3 = x[xOff + 3];
+ ulong zz_5 = zz[zzOff + 5];
+ ulong zz_6 = zz[zzOff + 6];
+ {
+ zz_3 += x_3 * x_0;
+ zz[zzOff + 3] = (uint)zz_3;
+ zz_4 += (zz_3 >> 32) + x_3 * x_1;
+ zz_5 += (zz_4 >> 32) + x_3 * x_2;
+ zz_4 &= M;
+ zz_6 += zz_5 >> 32;
+ zz_5 &= M;
+ }
+
+ ulong x_4 = x[xOff + 4];
+ ulong zz_7 = zz[zzOff + 7];
+ ulong zz_8 = zz[zzOff + 8];
+ {
+ zz_4 += x_4 * x_0;
+ zz[zzOff + 4] = (uint)zz_4;
+ zz_5 += (zz_4 >> 32) + x_4 * x_1;
+ zz_6 += (zz_5 >> 32) + x_4 * x_2;
+ zz_5 &= M;
+ zz_7 += (zz_6 >> 32) + x_4 * x_3;
+ zz_6 &= M;
+ zz_8 += zz_7 >> 32;
+ zz_7 &= M;
+ }
+
+ ulong x_5 = x[xOff + 5];
+ ulong zz_9 = zz[zzOff + 9];
+ ulong zz_10 = zz[zzOff + 10];
+ {
+ zz_5 += x_5 * x_0;
+ zz[zzOff + 5] = (uint)zz_5;
+ zz_6 += (zz_5 >> 32) + x_5 * x_1;
+ zz_7 += (zz_6 >> 32) + x_5 * x_2;
+ zz_8 += (zz_7 >> 32) + x_5 * x_3;
+ zz_9 += (zz_8 >> 32) + x_5 * x_4;
+ zz_10 += zz_9 >> 32;
+ }
+
+ zz[zzOff + 6] = (uint)zz_6;
+ zz[zzOff + 7] = (uint)zz_7;
+ zz[zzOff + 8] = (uint)zz_8;
+ zz[zzOff + 9] = (uint)zz_9;
+ zz[zzOff + 10] = (uint)zz_10;
+ zz[zzOff + 11] += (uint)(zz_10 >> 32);
+
+ ShiftUpBit(zz, zzOff, 12, (uint)x_0 << 31);
+ }
+
public static int Sub(uint[] x, uint[] y, uint[] z)
{
long c = 0;
@@ -660,6 +891,30 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
return (int)c;
}
+ public static int Sub(uint[] x, int xOff, uint[] y, int yOff, uint[] z, int zOff)
+ {
+ long c = 0;
+ c += (long)x[xOff + 0] - y[yOff + 0];
+ z[zOff + 0] = (uint)c;
+ c >>= 32;
+ c += (long)x[xOff + 1] - y[yOff + 1];
+ z[zOff + 1] = (uint)c;
+ c >>= 32;
+ c += (long)x[xOff + 2] - y[yOff + 2];
+ z[zOff + 2] = (uint)c;
+ c >>= 32;
+ c += (long)x[xOff + 3] - y[yOff + 3];
+ z[zOff + 3] = (uint)c;
+ c >>= 32;
+ c += (long)x[xOff + 4] - y[yOff + 4];
+ z[zOff + 4] = (uint)c;
+ c >>= 32;
+ c += (long)x[xOff + 5] - y[yOff + 5];
+ z[zOff + 5] = (uint)c;
+ c >>= 32;
+ return (int)c;
+ }
+
public static int SubBothFrom(uint[] x, uint[] y, uint[] z)
{
long c = 0;
diff --git a/crypto/src/math/ec/custom/sec/SecP192K1Field.cs b/crypto/src/math/ec/custom/sec/SecP192K1Field.cs
index eef42eecc..9b24adecd 100644
--- a/crypto/src/math/ec/custom/sec/SecP192K1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP192K1Field.cs
@@ -34,7 +34,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddOne(uint[] x, uint[] z)
{
- Array.Copy(x, 0, z, 0, 6);
+ Nat192.Copy(x, z);
uint c = Nat192.Inc(z, 0);
if (c != 0 || (z[5] == P5 && Nat192.Gte(z, P)))
{
diff --git a/crypto/src/math/ec/custom/sec/SecP192R1Field.cs b/crypto/src/math/ec/custom/sec/SecP192R1Field.cs
index 3871d9abb..37bbb8d68 100644
--- a/crypto/src/math/ec/custom/sec/SecP192R1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP192R1Field.cs
@@ -32,7 +32,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddOne(uint[] x, uint[] z)
{
- Array.Copy(x, 0, z, 0, 6);
+ Nat192.Copy(x, z);
uint c = Nat192.Inc(z, 0);
if (c != 0 || (z[5] == P5 && Nat192.Gte(z, P)))
{
diff --git a/crypto/src/math/ec/custom/sec/SecP224K1Field.cs b/crypto/src/math/ec/custom/sec/SecP224K1Field.cs
index ce07eff67..92f6b4ba1 100644
--- a/crypto/src/math/ec/custom/sec/SecP224K1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP224K1Field.cs
@@ -35,7 +35,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddOne(uint[] x, uint[] z)
{
- Array.Copy(x, 0, z, 0, 8);
+ Nat224.Copy(x, z);
uint c = Nat224.Inc(z, 0);
if (c != 0 || (z[6] == P6 && Nat224.Gte(z, P)))
{
diff --git a/crypto/src/math/ec/custom/sec/SecP224R1Field.cs b/crypto/src/math/ec/custom/sec/SecP224R1Field.cs
index 1cb3fe352..f2b9eda64 100644
--- a/crypto/src/math/ec/custom/sec/SecP224R1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP224R1Field.cs
@@ -32,7 +32,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddOne(uint[] x, uint[] z)
{
- Array.Copy(x, 0, z, 0, 6);
+ Nat224.Copy(x, z);
uint c = Nat224.Inc(z, 0);
if (c != 0 || (z[6] == P6 && Nat224.Gte(z, P)))
{
diff --git a/crypto/src/math/ec/custom/sec/SecP256K1Field.cs b/crypto/src/math/ec/custom/sec/SecP256K1Field.cs
index 8852339d3..cf918a67f 100644
--- a/crypto/src/math/ec/custom/sec/SecP256K1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP256K1Field.cs
@@ -36,7 +36,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddOne(uint[] x, uint[] z)
{
- Array.Copy(x, 0, z, 0, 8);
+ Nat256.Copy(x, z);
uint c = Nat256.Inc(z, 0);
if (c != 0 || (z[7] == P7 && Nat256.Gte(z, P)))
{
diff --git a/crypto/src/math/ec/custom/sec/SecP256R1Field.cs b/crypto/src/math/ec/custom/sec/SecP256R1Field.cs
index 9e366bffe..dd37820b6 100644
--- a/crypto/src/math/ec/custom/sec/SecP256R1Field.cs
+++ b/crypto/src/math/ec/custom/sec/SecP256R1Field.cs
@@ -33,7 +33,7 @@ namespace Org.BouncyCastle.Math.EC.Custom.Sec
public static void AddOne(uint[] x, uint[] z)
{
- Array.Copy(x, 0, z, 0, 8);
+ Nat256.Copy(x, z);
uint c = Nat256.Inc(z, 0);
if (c != 0 || (z[7] == P7 && Nat256.Gte(z, P)))
{
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