diff --git a/crypto/src/math/ec/rfc8032/Codec.cs b/crypto/src/math/ec/rfc8032/Codec.cs
new file mode 100644
index 000000000..3aacd12ab
--- /dev/null
+++ b/crypto/src/math/ec/rfc8032/Codec.cs
@@ -0,0 +1,133 @@
+using System;
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+using System.Buffers.Binary;
+#endif
+
+namespace Org.BouncyCastle.Math.EC.Rfc8032
+{
+ internal static class Codec
+ {
+ internal static uint Decode16(byte[] bs, int off)
+ {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ return BinaryPrimitives.ReadUInt16LittleEndian(bs.AsSpan(off));
+#else
+ uint n = bs[off];
+ n |= (uint)bs[++off] << 8;
+ return n;
+#endif
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static uint Decode16(ReadOnlySpan<byte> bs)
+ {
+ return BinaryPrimitives.ReadUInt16LittleEndian(bs);
+ }
+#endif
+
+ internal static uint Decode24(byte[] bs, int off)
+ {
+ uint n = bs[off];
+ n |= (uint)bs[++off] << 8;
+ n |= (uint)bs[++off] << 16;
+ return n;
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static uint Decode24(ReadOnlySpan<byte> bs)
+ {
+ uint n = bs[0];
+ n |= (uint)bs[1] << 8;
+ n |= (uint)bs[2] << 16;
+ return n;
+ }
+#endif
+
+ internal static uint Decode32(byte[] bs, int off)
+ {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ return BinaryPrimitives.ReadUInt32LittleEndian(bs.AsSpan(off));
+#else
+ uint n = bs[off];
+ n |= (uint)bs[++off] << 8;
+ n |= (uint)bs[++off] << 16;
+ n |= (uint)bs[++off] << 24;
+ return n;
+#endif
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static uint Decode32(ReadOnlySpan<byte> bs)
+ {
+ return BinaryPrimitives.ReadUInt32LittleEndian(bs);
+ }
+#endif
+
+ internal static void Decode32(byte[] bs, int bsOff, uint[] n, int nOff, int nLen)
+ {
+ for (int i = 0; i < nLen; ++i)
+ {
+ n[nOff + i] = Decode32(bs, bsOff + i * 4);
+ }
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static void Decode32(ReadOnlySpan<byte> bs, Span<uint> n)
+ {
+ for (int i = 0; i < n.Length; ++i)
+ {
+ n[i] = Decode32(bs[(i * 4)..]);
+ }
+ }
+#endif
+
+ internal static void Encode24(uint n, byte[] bs, int off)
+ {
+ bs[off] = (byte)(n);
+ bs[++off] = (byte)(n >> 8);
+ bs[++off] = (byte)(n >> 16);
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static void Encode24(uint n, Span<byte> bs)
+ {
+ bs[0] = (byte)(n);
+ bs[1] = (byte)(n >> 8);
+ bs[2] = (byte)(n >> 16);
+ }
+#endif
+
+ internal static void Encode32(uint n, byte[] bs, int off)
+ {
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ BinaryPrimitives.WriteUInt32LittleEndian(bs.AsSpan(off), n);
+#else
+ bs[ off] = (byte)(n );
+ bs[++off] = (byte)(n >> 8);
+ bs[++off] = (byte)(n >> 16);
+ bs[++off] = (byte)(n >> 24);
+#endif
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static void Encode32(uint n, Span<byte> bs)
+ {
+ BinaryPrimitives.WriteUInt32LittleEndian(bs, n);
+ }
+#endif
+
+ internal static void Encode56(ulong n, byte[] bs, int off)
+ {
+ Encode32((uint)n, bs, off);
+ Encode24((uint)(n >> 32), bs, off + 4);
+ }
+
+#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
+ internal static void Encode56(ulong n, Span<byte> bs)
+ {
+ Encode32((uint)n, bs);
+ Encode24((uint)(n >> 32), bs[4..]);
+ }
+#endif
+ }
+}
diff --git a/crypto/src/math/ec/rfc8032/Ed25519.cs b/crypto/src/math/ec/rfc8032/Ed25519.cs
index 502d5ed9c..696c6e6b7 100644
--- a/crypto/src/math/ec/rfc8032/Ed25519.cs
+++ b/crypto/src/math/ec/rfc8032/Ed25519.cs
@@ -1,7 +1,4 @@
using System;
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
-using System.Buffers.Binary;
-#endif
using System.Diagnostics;
using Org.BouncyCastle.Crypto;
@@ -149,7 +146,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
byte[] result = new byte[ScalarBytes * 2];
for (int i = 0; i < t.Length; ++i)
{
- Encode32(t[i], result, i * 4);
+ Codec.Encode32(t[i], result, i * 4);
}
return ReduceScalar(result);
}
@@ -203,11 +200,11 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
private static bool CheckPointVar(ReadOnlySpan<byte> p)
{
- if ((Decode32(p[28..]) & 0x7FFFFFFFU) < P[7])
+ if ((Codec.Decode32(p[28..]) & 0x7FFFFFFFU) < P[7])
return true;
for (int i = CoordUints - 2; i >= 0; --i)
{
- if (Decode32(p[(i * 4)..]) < P[i])
+ if (Codec.Decode32(p[(i * 4)..]) < P[i])
return true;
}
return false;
@@ -221,11 +218,11 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
#else
private static bool CheckPointVar(byte[] p)
{
- if ((Decode32(p, 28) & 0x7FFFFFFFU) < P[7])
+ if ((Codec.Decode32(p, 28) & 0x7FFFFFFFU) < P[7])
return true;
for (int i = CoordUints - 2; i >= 0; --i)
{
- if (Decode32(p, i * 4) < P[i])
+ if (Codec.Decode32(p, i * 4) < P[i])
return true;
}
return false;
@@ -258,62 +255,6 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
return CreateDigest();
}
- private static uint Decode24(byte[] bs, int off)
- {
- uint n = bs[off];
- n |= (uint)bs[++off] << 8;
- n |= (uint)bs[++off] << 16;
- return n;
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static uint Decode24(ReadOnlySpan<byte> bs)
- {
- uint n = bs[0];
- n |= (uint)bs[1] << 8;
- n |= (uint)bs[2] << 16;
- return n;
- }
-#endif
-
- private static uint Decode32(byte[] bs, int off)
- {
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- return BinaryPrimitives.ReadUInt32LittleEndian(bs.AsSpan(off));
-#else
- uint n = bs[off];
- n |= (uint)bs[++off] << 8;
- n |= (uint)bs[++off] << 16;
- n |= (uint)bs[++off] << 24;
- return n;
-#endif
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static uint Decode32(ReadOnlySpan<byte> bs)
- {
- return BinaryPrimitives.ReadUInt32LittleEndian(bs);
- }
-#endif
-
- private static void Decode32(byte[] bs, int bsOff, uint[] n, int nOff, int nLen)
- {
- for (int i = 0; i < nLen; ++i)
- {
- n[nOff + i] = Decode32(bs, bsOff + i * 4);
- }
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Decode32(ReadOnlySpan<byte> bs, Span<uint> n)
- {
- for (int i = 0; i < n.Length; ++i)
- {
- n[i] = Decode32(bs[(i * 4)..]);
- }
- }
-#endif
-
private static bool DecodePointVar(byte[] p, int pOff, bool negate, ref PointAffine r)
{
byte[] py = Copy(p, pOff, PointBytes);
@@ -350,13 +291,13 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
private static void DecodeScalar(byte[] k, int kOff, uint[] n)
{
- Decode32(k, kOff, n, 0, ScalarUints);
+ Codec.Decode32(k, kOff, n, 0, ScalarUints);
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
private static void DecodeScalar(ReadOnlySpan<byte> k, Span<uint> n)
{
- Decode32(k, n[..ScalarUints]);
+ Codec.Decode32(k, n[..ScalarUints]);
}
#endif
@@ -375,55 +316,6 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
}
}
- private static void Encode24(uint n, byte[] bs, int off)
- {
- bs[off] = (byte)(n);
- bs[++off] = (byte)(n >> 8);
- bs[++off] = (byte)(n >> 16);
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Encode24(uint n, Span<byte> bs)
- {
- bs[0] = (byte)(n);
- bs[1] = (byte)(n >> 8);
- bs[2] = (byte)(n >> 16);
- }
-#endif
-
- private static void Encode32(uint n, byte[] bs, int off)
- {
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- BinaryPrimitives.WriteUInt32LittleEndian(bs.AsSpan(off), n);
-#else
- bs[ off] = (byte)(n );
- bs[++off] = (byte)(n >> 8);
- bs[++off] = (byte)(n >> 16);
- bs[++off] = (byte)(n >> 24);
-#endif
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Encode32(uint n, Span<byte> bs)
- {
- BinaryPrimitives.WriteUInt32LittleEndian(bs, n);
- }
-#endif
-
- private static void Encode56(ulong n, byte[] bs, int off)
- {
- Encode32((uint)n, bs, off);
- Encode24((uint)(n >> 32), bs, off + 4);
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Encode56(ulong n, Span<byte> bs)
- {
- Encode32((uint)n, bs);
- Encode24((uint)(n >> 32), bs[4..]);
- }
-#endif
-
private static int EncodePoint(ref PointAccum p, byte[] r, int rOff)
{
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
@@ -1299,25 +1191,25 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
ReduceScalar(n, r);
#else
- long x00 = Decode32(n, 0) & M32L; // x00:32/--
- long x01 = (Decode24(n, 4) << 4) & M32L; // x01:28/--
- long x02 = Decode32(n, 7) & M32L; // x02:32/--
- long x03 = (Decode24(n, 11) << 4) & M32L; // x03:28/--
- long x04 = Decode32(n, 14) & M32L; // x04:32/--
- long x05 = (Decode24(n, 18) << 4) & M32L; // x05:28/--
- long x06 = Decode32(n, 21) & M32L; // x06:32/--
- long x07 = (Decode24(n, 25) << 4) & M32L; // x07:28/--
- long x08 = Decode32(n, 28) & M32L; // x08:32/--
- long x09 = (Decode24(n, 32) << 4) & M32L; // x09:28/--
- long x10 = Decode32(n, 35) & M32L; // x10:32/--
- long x11 = (Decode24(n, 39) << 4) & M32L; // x11:28/--
- long x12 = Decode32(n, 42) & M32L; // x12:32/--
- long x13 = (Decode24(n, 46) << 4) & M32L; // x13:28/--
- long x14 = Decode32(n, 49) & M32L; // x14:32/--
- long x15 = (Decode24(n, 53) << 4) & M32L; // x15:28/--
- long x16 = Decode32(n, 56) & M32L; // x16:32/--
- long x17 = (Decode24(n, 60) << 4) & M32L; // x17:28/--
- long x18 = n[63] & M08L; // x18:08/--
+ long x00 = Codec.Decode32(n, 0) & M32L; // x00:32/--
+ long x01 = (Codec.Decode24(n, 4) << 4) & M32L; // x01:28/--
+ long x02 = Codec.Decode32(n, 7) & M32L; // x02:32/--
+ long x03 = (Codec.Decode24(n, 11) << 4) & M32L; // x03:28/--
+ long x04 = Codec.Decode32(n, 14) & M32L; // x04:32/--
+ long x05 = (Codec.Decode24(n, 18) << 4) & M32L; // x05:28/--
+ long x06 = Codec.Decode32(n, 21) & M32L; // x06:32/--
+ long x07 = (Codec.Decode24(n, 25) << 4) & M32L; // x07:28/--
+ long x08 = Codec.Decode32(n, 28) & M32L; // x08:32/--
+ long x09 = (Codec.Decode24(n, 32) << 4) & M32L; // x09:28/--
+ long x10 = Codec.Decode32(n, 35) & M32L; // x10:32/--
+ long x11 = (Codec.Decode24(n, 39) << 4) & M32L; // x11:28/--
+ long x12 = Codec.Decode32(n, 42) & M32L; // x12:32/--
+ long x13 = (Codec.Decode24(n, 46) << 4) & M32L; // x13:28/--
+ long x14 = Codec.Decode32(n, 49) & M32L; // x14:32/--
+ long x15 = (Codec.Decode24(n, 53) << 4) & M32L; // x15:28/--
+ long x16 = Codec.Decode32(n, 56) & M32L; // x16:32/--
+ long x17 = (Codec.Decode24(n, 60) << 4) & M32L; // x17:28/--
+ long x18 = n[63] & M08L; // x18:08/--
long t;
//x18 += (x17 >> 28); x17 &= M28L;
@@ -1424,11 +1316,11 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
x07 += (x06 >> 28); x06 &= M28L;
x08 += (x07 >> 28); x07 &= M28L;
- Encode56((ulong)(x00 | (x01 << 28)), r, 0);
- Encode56((ulong)(x02 | (x03 << 28)), r, 7);
- Encode56((ulong)(x04 | (x05 << 28)), r, 14);
- Encode56((ulong)(x06 | (x07 << 28)), r, 21);
- Encode32((uint)x08, r, 28);
+ Codec.Encode56((ulong)(x00 | (x01 << 28)), r, 0);
+ Codec.Encode56((ulong)(x02 | (x03 << 28)), r, 7);
+ Codec.Encode56((ulong)(x04 | (x05 << 28)), r, 14);
+ Codec.Encode56((ulong)(x06 | (x07 << 28)), r, 21);
+ Codec.Encode32((uint)x08, r, 28);
#endif
return r;
@@ -1437,25 +1329,25 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
private static void ReduceScalar(ReadOnlySpan<byte> n, Span<byte> r)
{
- long x00 = Decode32(n[0..]) & M32L; // x00:32/--
- long x01 = (Decode24(n[4..]) << 4) & M32L; // x01:28/--
- long x02 = Decode32(n[7..]) & M32L; // x02:32/--
- long x03 = (Decode24(n[11..]) << 4) & M32L; // x03:28/--
- long x04 = Decode32(n[14..]) & M32L; // x04:32/--
- long x05 = (Decode24(n[18..]) << 4) & M32L; // x05:28/--
- long x06 = Decode32(n[21..]) & M32L; // x06:32/--
- long x07 = (Decode24(n[25..]) << 4) & M32L; // x07:28/--
- long x08 = Decode32(n[28..]) & M32L; // x08:32/--
- long x09 = (Decode24(n[32..]) << 4) & M32L; // x09:28/--
- long x10 = Decode32(n[35..]) & M32L; // x10:32/--
- long x11 = (Decode24(n[39..]) << 4) & M32L; // x11:28/--
- long x12 = Decode32(n[42..]) & M32L; // x12:32/--
- long x13 = (Decode24(n[46..]) << 4) & M32L; // x13:28/--
- long x14 = Decode32(n[49..]) & M32L; // x14:32/--
- long x15 = (Decode24(n[53..]) << 4) & M32L; // x15:28/--
- long x16 = Decode32(n[56..]) & M32L; // x16:32/--
- long x17 = (Decode24(n[60..]) << 4) & M32L; // x17:28/--
- long x18 = n[63] & M08L; // x18:08/--
+ long x00 = Codec.Decode32(n[ 0..]) & M32L; // x00:32/--
+ long x01 = (Codec.Decode24(n[ 4..]) << 4) & M32L; // x01:28/--
+ long x02 = Codec.Decode32(n[ 7..]) & M32L; // x02:32/--
+ long x03 = (Codec.Decode24(n[11..]) << 4) & M32L; // x03:28/--
+ long x04 = Codec.Decode32(n[14..]) & M32L; // x04:32/--
+ long x05 = (Codec.Decode24(n[18..]) << 4) & M32L; // x05:28/--
+ long x06 = Codec.Decode32(n[21..]) & M32L; // x06:32/--
+ long x07 = (Codec.Decode24(n[25..]) << 4) & M32L; // x07:28/--
+ long x08 = Codec.Decode32(n[28..]) & M32L; // x08:32/--
+ long x09 = (Codec.Decode24(n[32..]) << 4) & M32L; // x09:28/--
+ long x10 = Codec.Decode32(n[35..]) & M32L; // x10:32/--
+ long x11 = (Codec.Decode24(n[39..]) << 4) & M32L; // x11:28/--
+ long x12 = Codec.Decode32(n[42..]) & M32L; // x12:32/--
+ long x13 = (Codec.Decode24(n[46..]) << 4) & M32L; // x13:28/--
+ long x14 = Codec.Decode32(n[49..]) & M32L; // x14:32/--
+ long x15 = (Codec.Decode24(n[53..]) << 4) & M32L; // x15:28/--
+ long x16 = Codec.Decode32(n[56..]) & M32L; // x16:32/--
+ long x17 = (Codec.Decode24(n[60..]) << 4) & M32L; // x17:28/--
+ long x18 = n[63] & M08L; // x18:08/--
long t;
//x18 += (x17 >> 28); x17 &= M28L;
@@ -1562,11 +1454,11 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
x07 += (x06 >> 28); x06 &= M28L;
x08 += (x07 >> 28); x07 &= M28L;
- Encode56((ulong)(x00 | (x01 << 28)), r);
- Encode56((ulong)(x02 | (x03 << 28)), r[7..]);
- Encode56((ulong)(x04 | (x05 << 28)), r[14..]);
- Encode56((ulong)(x06 | (x07 << 28)), r[21..]);
- Encode32((uint)x08, r[28..]);
+ Codec.Encode56((ulong)(x00 | (x01 << 28)), r);
+ Codec.Encode56((ulong)(x02 | (x03 << 28)), r[7..]);
+ Codec.Encode56((ulong)(x04 | (x05 << 28)), r[14..]);
+ Codec.Encode56((ulong)(x06 | (x07 << 28)), r[21..]);
+ Codec.Encode32((uint)x08, r[28..]);
}
#endif
@@ -1857,10 +1749,8 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
int wp = ws_p[bit];
if (wp != 0)
{
- int sign = wp >> 31;
- int index = (wp >> 1) ^ sign;
-
- PointAddVar(sign != 0, ref tp[index], ref r, ref t);
+ int index = (wp >> 1) ^ (wp >> 31);
+ PointAddVar(wp < 0, ref tp[index], ref r, ref t);
}
if (--bit < 0)
@@ -1908,19 +1798,15 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
int wb = ws_b[bit];
if (wb != 0)
{
- int sign = wb >> 31;
- int index = (wb >> 1) ^ sign;
-
- PointAddVar(sign != 0, ref PrecompBaseWnaf[index], ref r, ref t);
+ int index = (wb >> 1) ^ (wb >> 31);
+ PointAddVar(wb < 0, ref PrecompBaseWnaf[index], ref r, ref t);
}
int wp = ws_p[bit];
if (wp != 0)
{
- int sign = wp >> 31;
- int index = (wp >> 1) ^ sign;
-
- PointAddVar(sign != 0, ref tp[index], ref r, ref t);
+ int index = (wp >> 1) ^ (wp >> 31);
+ PointAddVar(wp < 0, ref tp[index], ref r, ref t);
}
if (--bit < 0)
diff --git a/crypto/src/math/ec/rfc8032/Ed448.cs b/crypto/src/math/ec/rfc8032/Ed448.cs
index 6d0bc5c7d..7baa221a5 100644
--- a/crypto/src/math/ec/rfc8032/Ed448.cs
+++ b/crypto/src/math/ec/rfc8032/Ed448.cs
@@ -1,7 +1,4 @@
using System;
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
-using System.Buffers.Binary;
-#endif
using System.Diagnostics;
using Org.BouncyCastle.Crypto;
@@ -127,7 +124,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
byte[] result = new byte[ScalarBytes * 2];
for (int i = 0; i < t.Length; ++i)
{
- Encode32(t[i], result, i * 4);
+ Codec.Encode32(t[i], result, i * 4);
}
return ReduceScalar(result);
}
@@ -182,13 +179,13 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
{
if ((p[PointBytes - 1] & 0x7F) != 0x00)
return false;
- if (Decode32(p[52..]) < P[13])
+ if (Codec.Decode32(p[52..]) < P[13])
return true;
int last = p[28] == 0xFF ? 7 : 0;
for (int i = CoordUints - 2; i >= last; --i)
{
- if (Decode32(p[(i * 4)..]) < P[i])
+ if (Codec.Decode32(p[(i * 4)..]) < P[i])
return true;
}
return false;
@@ -207,13 +204,13 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
{
if ((p[PointBytes - 1] & 0x7F) != 0x00)
return false;
- if (Decode32(p, 52) < P[13])
+ if (Codec.Decode32(p, 52) < P[13])
return true;
int last = p[28] == 0xFF ? 7 : 0;
for (int i = CoordUints - 2; i >= last; --i)
{
- if (Decode32(p, i * 4) < P[i])
+ if (Codec.Decode32(p, i * 4) < P[i])
return true;
}
return false;
@@ -246,80 +243,6 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
return new ShakeDigest(256);
}
- private static uint Decode16(byte[] bs, int off)
- {
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- return BinaryPrimitives.ReadUInt16LittleEndian(bs.AsSpan(off));
-#else
- uint n = bs[off];
- n |= (uint)bs[++off] << 8;
- return n;
-#endif
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static uint Decode16(ReadOnlySpan<byte> bs)
- {
- return BinaryPrimitives.ReadUInt16LittleEndian(bs);
- }
-#endif
-
- private static uint Decode24(byte[] bs, int off)
- {
- uint n = bs[off];
- n |= (uint)bs[++off] << 8;
- n |= (uint)bs[++off] << 16;
- return n;
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static uint Decode24(ReadOnlySpan<byte> bs)
- {
- uint n = bs[0];
- n |= (uint)bs[1] << 8;
- n |= (uint)bs[2] << 16;
- return n;
- }
-#endif
-
- private static uint Decode32(byte[] bs, int off)
- {
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- return BinaryPrimitives.ReadUInt32LittleEndian(bs.AsSpan(off));
-#else
- uint n = bs[off];
- n |= (uint)bs[++off] << 8;
- n |= (uint)bs[++off] << 16;
- n |= (uint)bs[++off] << 24;
- return n;
-#endif
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static uint Decode32(ReadOnlySpan<byte> bs)
- {
- return BinaryPrimitives.ReadUInt32LittleEndian(bs);
- }
-#endif
-
- private static void Decode32(byte[] bs, int bsOff, uint[] n, int nOff, int nLen)
- {
- for (int i = 0; i < nLen; ++i)
- {
- n[nOff + i] = Decode32(bs, bsOff + i * 4);
- }
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Decode32(ReadOnlySpan<byte> bs, Span<uint> n)
- {
- for (int i = 0; i < n.Length; ++i)
- {
- n[i] = Decode32(bs[(i * 4)..]);
- }
- }
-#endif
-
private static bool DecodePointVar(byte[] p, int pOff, bool negate, ref PointProjective r)
{
byte[] py = Copy(p, pOff, PointBytes);
@@ -360,7 +283,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
{
Debug.Assert(k[kOff + ScalarBytes - 1] == 0x00);
- Decode32(k, kOff, n, 0, ScalarUints);
+ Codec.Decode32(k, kOff, n, 0, ScalarUints);
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
@@ -368,7 +291,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
{
Debug.Assert(k[ScalarBytes - 1] == 0x00);
- Decode32(k, n[..ScalarUints]);
+ Codec.Decode32(k, n[..ScalarUints]);
}
#endif
@@ -384,55 +307,6 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
d.BlockUpdate(t, 0, t.Length);
}
- private static void Encode24(uint n, byte[] bs, int off)
- {
- bs[off] = (byte)(n);
- bs[++off] = (byte)(n >> 8);
- bs[++off] = (byte)(n >> 16);
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Encode24(uint n, Span<byte> bs)
- {
- bs[0] = (byte)(n);
- bs[1] = (byte)(n >> 8);
- bs[2] = (byte)(n >> 16);
- }
-#endif
-
- private static void Encode32(uint n, byte[] bs, int off)
- {
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- BinaryPrimitives.WriteUInt32LittleEndian(bs.AsSpan(off), n);
-#else
- bs[ off] = (byte)(n );
- bs[++off] = (byte)(n >> 8);
- bs[++off] = (byte)(n >> 16);
- bs[++off] = (byte)(n >> 24);
-#endif
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Encode32(uint n, Span<byte> bs)
- {
- BinaryPrimitives.WriteUInt32LittleEndian(bs, n);
- }
-#endif
-
- private static void Encode56(ulong n, byte[] bs, int off)
- {
- Encode32((uint)n, bs, off);
- Encode24((uint)(n >> 32), bs, off + 4);
- }
-
-#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
- private static void Encode56(ulong n, Span<byte> bs)
- {
- Encode32((uint)n, bs);
- Encode24((uint)(n >> 32), bs[4..]);
- }
-#endif
-
private static int EncodePoint(ref PointProjective p, byte[] r, int rOff)
{
uint[] x = F.Create();
@@ -1196,39 +1070,39 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
ReduceScalar(n, r);
#else
- ulong x00 = Decode32(n, 0); // x00:32/--
- ulong x01 = (Decode24(n, 4) << 4); // x01:28/--
- ulong x02 = Decode32(n, 7); // x02:32/--
- ulong x03 = (Decode24(n, 11) << 4); // x03:28/--
- ulong x04 = Decode32(n, 14); // x04:32/--
- ulong x05 = (Decode24(n, 18) << 4); // x05:28/--
- ulong x06 = Decode32(n, 21); // x06:32/--
- ulong x07 = (Decode24(n, 25) << 4); // x07:28/--
- ulong x08 = Decode32(n, 28); // x08:32/--
- ulong x09 = (Decode24(n, 32) << 4); // x09:28/--
- ulong x10 = Decode32(n, 35); // x10:32/--
- ulong x11 = (Decode24(n, 39) << 4); // x11:28/--
- ulong x12 = Decode32(n, 42); // x12:32/--
- ulong x13 = (Decode24(n, 46) << 4); // x13:28/--
- ulong x14 = Decode32(n, 49); // x14:32/--
- ulong x15 = (Decode24(n, 53) << 4); // x15:28/--
- ulong x16 = Decode32(n, 56); // x16:32/--
- ulong x17 = (Decode24(n, 60) << 4); // x17:28/--
- ulong x18 = Decode32(n, 63); // x18:32/--
- ulong x19 = (Decode24(n, 67) << 4); // x19:28/--
- ulong x20 = Decode32(n, 70); // x20:32/--
- ulong x21 = (Decode24(n, 74) << 4); // x21:28/--
- ulong x22 = Decode32(n, 77); // x22:32/--
- ulong x23 = (Decode24(n, 81) << 4); // x23:28/--
- ulong x24 = Decode32(n, 84); // x24:32/--
- ulong x25 = (Decode24(n, 88) << 4); // x25:28/--
- ulong x26 = Decode32(n, 91); // x26:32/--
- ulong x27 = (Decode24(n, 95) << 4); // x27:28/--
- ulong x28 = Decode32(n, 98); // x28:32/--
- ulong x29 = (Decode24(n, 102) << 4); // x29:28/--
- ulong x30 = Decode32(n, 105); // x30:32/--
- ulong x31 = (Decode24(n, 109) << 4); // x31:28/--
- ulong x32 = Decode16(n, 112); // x32:16/--
+ ulong x00 = Codec.Decode32(n, 0); // x00:32/--
+ ulong x01 = (Codec.Decode24(n, 4) << 4); // x01:28/--
+ ulong x02 = Codec.Decode32(n, 7); // x02:32/--
+ ulong x03 = (Codec.Decode24(n, 11) << 4); // x03:28/--
+ ulong x04 = Codec.Decode32(n, 14); // x04:32/--
+ ulong x05 = (Codec.Decode24(n, 18) << 4); // x05:28/--
+ ulong x06 = Codec.Decode32(n, 21); // x06:32/--
+ ulong x07 = (Codec.Decode24(n, 25) << 4); // x07:28/--
+ ulong x08 = Codec.Decode32(n, 28); // x08:32/--
+ ulong x09 = (Codec.Decode24(n, 32) << 4); // x09:28/--
+ ulong x10 = Codec.Decode32(n, 35); // x10:32/--
+ ulong x11 = (Codec.Decode24(n, 39) << 4); // x11:28/--
+ ulong x12 = Codec.Decode32(n, 42); // x12:32/--
+ ulong x13 = (Codec.Decode24(n, 46) << 4); // x13:28/--
+ ulong x14 = Codec.Decode32(n, 49); // x14:32/--
+ ulong x15 = (Codec.Decode24(n, 53) << 4); // x15:28/--
+ ulong x16 = Codec.Decode32(n, 56); // x16:32/--
+ ulong x17 = (Codec.Decode24(n, 60) << 4); // x17:28/--
+ ulong x18 = Codec.Decode32(n, 63); // x18:32/--
+ ulong x19 = (Codec.Decode24(n, 67) << 4); // x19:28/--
+ ulong x20 = Codec.Decode32(n, 70); // x20:32/--
+ ulong x21 = (Codec.Decode24(n, 74) << 4); // x21:28/--
+ ulong x22 = Codec.Decode32(n, 77); // x22:32/--
+ ulong x23 = (Codec.Decode24(n, 81) << 4); // x23:28/--
+ ulong x24 = Codec.Decode32(n, 84); // x24:32/--
+ ulong x25 = (Codec.Decode24(n, 88) << 4); // x25:28/--
+ ulong x26 = Codec.Decode32(n, 91); // x26:32/--
+ ulong x27 = (Codec.Decode24(n, 95) << 4); // x27:28/--
+ ulong x28 = Codec.Decode32(n, 98); // x28:32/--
+ ulong x29 = (Codec.Decode24(n, 102) << 4); // x29:28/--
+ ulong x30 = Codec.Decode32(n, 105); // x30:32/--
+ ulong x31 = (Codec.Decode24(n, 109) << 4); // x31:28/--
+ ulong x32 = Codec.Decode16(n, 112); // x32:16/--
//x32 += (x31 >> 28); x31 &= M28UL;
x16 += x32 * L4_0; // x16:42/--
@@ -1458,14 +1332,14 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
Debug.Assert(x15 >> 26 == 0UL);
- Encode56(x00 | (x01 << 28), r, 0);
- Encode56(x02 | (x03 << 28), r, 7);
- Encode56(x04 | (x05 << 28), r, 14);
- Encode56(x06 | (x07 << 28), r, 21);
- Encode56(x08 | (x09 << 28), r, 28);
- Encode56(x10 | (x11 << 28), r, 35);
- Encode56(x12 | (x13 << 28), r, 42);
- Encode56(x14 | (x15 << 28), r, 49);
+ Codec.Encode56(x00 | (x01 << 28), r, 0);
+ Codec.Encode56(x02 | (x03 << 28), r, 7);
+ Codec.Encode56(x04 | (x05 << 28), r, 14);
+ Codec.Encode56(x06 | (x07 << 28), r, 21);
+ Codec.Encode56(x08 | (x09 << 28), r, 28);
+ Codec.Encode56(x10 | (x11 << 28), r, 35);
+ Codec.Encode56(x12 | (x13 << 28), r, 42);
+ Codec.Encode56(x14 | (x15 << 28), r, 49);
//r[ScalarBytes - 1] = 0;
#endif
@@ -1475,39 +1349,39 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
private static void ReduceScalar(ReadOnlySpan<byte> n, Span<byte> r)
{
- ulong x00 = Decode32(n[ 0..]); // x00:32/--
- ulong x01 = (Decode24(n[ 4..]) << 4); // x01:28/--
- ulong x02 = Decode32(n[ 7..]); // x02:32/--
- ulong x03 = (Decode24(n[11..]) << 4); // x03:28/--
- ulong x04 = Decode32(n[14..]); // x04:32/--
- ulong x05 = (Decode24(n[18..]) << 4); // x05:28/--
- ulong x06 = Decode32(n[21..]); // x06:32/--
- ulong x07 = (Decode24(n[25..]) << 4); // x07:28/--
- ulong x08 = Decode32(n[28..]); // x08:32/--
- ulong x09 = (Decode24(n[32..]) << 4); // x09:28/--
- ulong x10 = Decode32(n[35..]); // x10:32/--
- ulong x11 = (Decode24(n[39..]) << 4); // x11:28/--
- ulong x12 = Decode32(n[42..]); // x12:32/--
- ulong x13 = (Decode24(n[46..]) << 4); // x13:28/--
- ulong x14 = Decode32(n[49..]); // x14:32/--
- ulong x15 = (Decode24(n[53..]) << 4); // x15:28/--
- ulong x16 = Decode32(n[56..]); // x16:32/--
- ulong x17 = (Decode24(n[60..]) << 4); // x17:28/--
- ulong x18 = Decode32(n[63..]); // x18:32/--
- ulong x19 = (Decode24(n[67..]) << 4); // x19:28/--
- ulong x20 = Decode32(n[70..]); // x20:32/--
- ulong x21 = (Decode24(n[74..]) << 4); // x21:28/--
- ulong x22 = Decode32(n[77..]); // x22:32/--
- ulong x23 = (Decode24(n[81..]) << 4); // x23:28/--
- ulong x24 = Decode32(n[84..]); // x24:32/--
- ulong x25 = (Decode24(n[88..]) << 4); // x25:28/--
- ulong x26 = Decode32(n[91..]); // x26:32/--
- ulong x27 = (Decode24(n[95..]) << 4); // x27:28/--
- ulong x28 = Decode32(n[98..]); // x28:32/--
- ulong x29 = (Decode24(n[102..]) << 4); // x29:28/--
- ulong x30 = Decode32(n[105..]); // x30:32/--
- ulong x31 = (Decode24(n[109..]) << 4); // x31:28/--
- ulong x32 = Decode16(n[112..]); // x32:16/--
+ ulong x00 = Codec.Decode32(n[ 0..]); // x00:32/--
+ ulong x01 = (Codec.Decode24(n[ 4..]) << 4); // x01:28/--
+ ulong x02 = Codec.Decode32(n[ 7..]); // x02:32/--
+ ulong x03 = (Codec.Decode24(n[ 11..]) << 4); // x03:28/--
+ ulong x04 = Codec.Decode32(n[ 14..]); // x04:32/--
+ ulong x05 = (Codec.Decode24(n[ 18..]) << 4); // x05:28/--
+ ulong x06 = Codec.Decode32(n[ 21..]); // x06:32/--
+ ulong x07 = (Codec.Decode24(n[ 25..]) << 4); // x07:28/--
+ ulong x08 = Codec.Decode32(n[ 28..]); // x08:32/--
+ ulong x09 = (Codec.Decode24(n[ 32..]) << 4); // x09:28/--
+ ulong x10 = Codec.Decode32(n[ 35..]); // x10:32/--
+ ulong x11 = (Codec.Decode24(n[ 39..]) << 4); // x11:28/--
+ ulong x12 = Codec.Decode32(n[ 42..]); // x12:32/--
+ ulong x13 = (Codec.Decode24(n[ 46..]) << 4); // x13:28/--
+ ulong x14 = Codec.Decode32(n[ 49..]); // x14:32/--
+ ulong x15 = (Codec.Decode24(n[ 53..]) << 4); // x15:28/--
+ ulong x16 = Codec.Decode32(n[ 56..]); // x16:32/--
+ ulong x17 = (Codec.Decode24(n[ 60..]) << 4); // x17:28/--
+ ulong x18 = Codec.Decode32(n[ 63..]); // x18:32/--
+ ulong x19 = (Codec.Decode24(n[ 67..]) << 4); // x19:28/--
+ ulong x20 = Codec.Decode32(n[ 70..]); // x20:32/--
+ ulong x21 = (Codec.Decode24(n[ 74..]) << 4); // x21:28/--
+ ulong x22 = Codec.Decode32(n[ 77..]); // x22:32/--
+ ulong x23 = (Codec.Decode24(n[ 81..]) << 4); // x23:28/--
+ ulong x24 = Codec.Decode32(n[ 84..]); // x24:32/--
+ ulong x25 = (Codec.Decode24(n[ 88..]) << 4); // x25:28/--
+ ulong x26 = Codec.Decode32(n[ 91..]); // x26:32/--
+ ulong x27 = (Codec.Decode24(n[ 95..]) << 4); // x27:28/--
+ ulong x28 = Codec.Decode32(n[ 98..]); // x28:32/--
+ ulong x29 = (Codec.Decode24(n[102..]) << 4); // x29:28/--
+ ulong x30 = Codec.Decode32(n[105..]); // x30:32/--
+ ulong x31 = (Codec.Decode24(n[109..]) << 4); // x31:28/--
+ ulong x32 = Codec.Decode16(n[112..]); // x32:16/--
//x32 += (x31 >> 28); x31 &= M28UL;
x16 += x32 * L4_0; // x16:42/--
@@ -1737,15 +1611,15 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
Debug.Assert(x15 >> 26 == 0UL);
- Encode56(x00 | (x01 << 28), r);
- Encode56(x02 | (x03 << 28), r[7..]);
- Encode56(x04 | (x05 << 28), r[14..]);
- Encode56(x06 | (x07 << 28), r[21..]);
- Encode56(x08 | (x09 << 28), r[28..]);
- Encode56(x10 | (x11 << 28), r[35..]);
- Encode56(x12 | (x13 << 28), r[42..]);
- Encode56(x14 | (x15 << 28), r[49..]);
- //r[ScalarBytes - 1] = 0;
+ Codec.Encode56(x00 | (x01 << 28), r);
+ Codec.Encode56(x02 | (x03 << 28), r[7..]);
+ Codec.Encode56(x04 | (x05 << 28), r[14..]);
+ Codec.Encode56(x06 | (x07 << 28), r[21..]);
+ Codec.Encode56(x08 | (x09 << 28), r[28..]);
+ Codec.Encode56(x10 | (x11 << 28), r[35..]);
+ Codec.Encode56(x12 | (x13 << 28), r[42..]);
+ Codec.Encode56(x14 | (x15 << 28), r[49..]);
+ r[ScalarBytes - 1] = 0;
}
#endif
@@ -2035,10 +1909,8 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
int wp = ws_p[bit];
if (wp != 0)
{
- int sign = wp >> 31;
- int index = (wp >> 1) ^ sign;
-
- PointAddVar(sign != 0, ref tp[index], ref r);
+ int index = (wp >> 1) ^ (wp >> 31);
+ PointAddVar(wp < 0, ref tp[index], ref r);
}
if (--bit < 0)
@@ -2085,19 +1957,15 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
int wb = ws_b[bit];
if (wb != 0)
{
- int sign = wb >> 31;
- int index = (wb >> 1) ^ sign;
-
- PointAddVar(sign != 0, ref PrecompBaseWnaf[index], ref r);
+ int index = (wb >> 1) ^ (wb >> 31);
+ PointAddVar(wb < 0, ref PrecompBaseWnaf[index], ref r);
}
int wp = ws_p[bit];
if (wp != 0)
{
- int sign = wp >> 31;
- int index = (wp >> 1) ^ sign;
-
- PointAddVar(sign != 0, ref tp[index], ref r);
+ int index = (wp >> 1) ^ (wp >> 31);
+ PointAddVar(wp < 0, ref tp[index], ref r);
}
if (--bit < 0)
|
