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author | Peter Dettman <peter.dettman@bouncycastle.org> | 2021-05-24 12:08:48 +0700 |
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committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2021-05-24 12:08:48 +0700 |
commit | c9efa526339a36c497f1352cafc0411535b2c153 (patch) | |
tree | 04459ed728328be0a4852e3e572f51e077d2d79d /crypto/src | |
parent | Use DigestSink (diff) | |
download | BouncyCastle.NET-ed25519-c9efa526339a36c497f1352cafc0411535b2c153.tar.xz |
Noekeon improvements
- check key size in Init - perf. opts.
Diffstat (limited to 'crypto/src')
-rw-r--r-- | crypto/src/crypto/engines/NoekeonEngine.cs | 112 |
1 files changed, 58 insertions, 54 deletions
diff --git a/crypto/src/crypto/engines/NoekeonEngine.cs b/crypto/src/crypto/engines/NoekeonEngine.cs index 65f6e3878..838a40339 100644 --- a/crypto/src/crypto/engines/NoekeonEngine.cs +++ b/crypto/src/crypto/engines/NoekeonEngine.cs @@ -60,12 +60,12 @@ namespace Org.BouncyCastle.Crypto.Engines throw new ArgumentException("Invalid parameters passed to Noekeon init - " + Platform.GetTypeName(parameters), "parameters"); - this._forEncryption = forEncryption; - this._initialised = true; - KeyParameter p = (KeyParameter) parameters; + byte[] key = p.GetKey(); + if (key.Length != 16) + throw new ArgumentException("Key length not 128 bits."); - Pack.BE_To_UInt32(p.GetKey(), 0, k, 0, 4); + Pack.BE_To_UInt32(key, 0, k, 0, 4); if (!forEncryption) { @@ -73,22 +73,26 @@ namespace Org.BouncyCastle.Crypto.Engines { uint a0 = k[0], a1 = k[1], a2 = k[2], a3 = k[3]; - uint t = a0 ^ a2; - t ^= Integers.RotateLeft(t, 8) ^ Integers.RotateLeft(t, 24); - a1 ^= t; - a3 ^= t; + uint t02 = a0 ^ a2; + t02 ^= Integers.RotateLeft(t02, 8) ^ Integers.RotateLeft(t02, 24); + + uint t13 = a1 ^ a3; + t13 ^= Integers.RotateLeft(t13, 8) ^ Integers.RotateLeft(t13, 24); - t = a1 ^ a3; - t ^= Integers.RotateLeft(t, 8) ^ Integers.RotateLeft(t, 24); - a0 ^= t; - a2 ^= t; + a0 ^= t13; + a1 ^= t02; + a2 ^= t13; + a3 ^= t02; - k[0] = a0; k[1] = a1; k[2] = a2; k[3] = a3; + k[0] = a0; k[1] = a1; k[2] = a2; k[3] = a3; } } - } - public virtual int ProcessBlock( + this._forEncryption = forEncryption; + this._initialised = true; + } + + public virtual int ProcessBlock( byte[] input, int inOff, byte[] output, @@ -119,27 +123,27 @@ namespace Org.BouncyCastle.Crypto.Engines uint k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3]; int round = 0; - uint t; for (;;) { a0 ^= RoundConstants[round]; // theta(a, k); { - t = a0 ^ a2; - t ^= Integers.RotateLeft(t, 8) ^ Integers.RotateLeft(t, 24); - a1 ^= t; - a3 ^= t; + uint t02 = a0 ^ a2; + t02 ^= Integers.RotateLeft(t02, 8) ^ Integers.RotateLeft(t02, 24); a0 ^= k0; a1 ^= k1; a2 ^= k2; a3 ^= k3; - t = a1 ^ a3; - t ^= Integers.RotateLeft(t, 8) ^ Integers.RotateLeft(t, 24); - a0 ^= t; - a2 ^= t; + uint t13 = a1 ^ a3; + t13 ^= Integers.RotateLeft(t13, 8) ^ Integers.RotateLeft(t13, 24); + + a0 ^= t13; + a1 ^= t02; + a2 ^= t13; + a3 ^= t02; } if (++round > Size) @@ -154,14 +158,14 @@ namespace Org.BouncyCastle.Crypto.Engines // gamma(a); { - a1 ^= ~a3 & ~a2; - a0 ^= a2 & a1; + uint t = a3; + a1 ^= a3 | a2; + a3 = a0 ^ (a2 & ~a1); - t = a3; a3 = a0; a0 = t; - a2 ^= a0 ^ a1 ^ a3; + a2 = t ^ ~a1 ^ a2 ^ a3; - a1 ^= ~a3 & ~a2; - a0 ^= a2 & a1; + a1 ^= a3 | a2; + a0 = t ^ (a2 & a1); } // pi2(a); @@ -190,28 +194,28 @@ namespace Org.BouncyCastle.Crypto.Engines uint k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3]; int round = Size; - uint t; for (;;) { // theta(a, k); { - t = a0 ^ a2; - t ^= Integers.RotateLeft(t, 8) ^ Integers.RotateLeft(t, 24); - a1 ^= t; - a3 ^= t; + uint t02 = a0 ^ a2; + t02 ^= Integers.RotateLeft(t02, 8) ^ Integers.RotateLeft(t02, 24); - a0 ^= k0; - a1 ^= k1; - a2 ^= k2; - a3 ^= k3; + a0 ^= k0; + a1 ^= k1; + a2 ^= k2; + a3 ^= k3; - t = a1 ^ a3; - t ^= Integers.RotateLeft(t, 8) ^ Integers.RotateLeft(t, 24); - a0 ^= t; - a2 ^= t; - } + uint t13 = a1 ^ a3; + t13 ^= Integers.RotateLeft(t13, 8) ^ Integers.RotateLeft(t13, 24); - a0 ^= RoundConstants[round]; + a0 ^= t13; + a1 ^= t02; + a2 ^= t13; + a3 ^= t02; + } + + a0 ^= RoundConstants[round]; if (--round < 0) break; @@ -225,18 +229,18 @@ namespace Org.BouncyCastle.Crypto.Engines // gamma(a); { - a1 ^= ~a3 & ~a2; - a0 ^= a2 & a1; + uint t = a3; + a1 ^= a3 | a2; + a3 = a0 ^ (a2 & ~a1); - t = a3; a3 = a0; a0 = t; - a2 ^= a0 ^ a1 ^ a3; + a2 = t ^ ~a1 ^ a2 ^ a3; - a1 ^= ~a3 & ~a2; - a0 ^= a2 & a1; - } + a1 ^= a3 | a2; + a0 = t ^ (a2 & a1); + } - // pi2(a); - { + // pi2(a); + { a1 = Integers.RotateLeft(a1, 31); a2 = Integers.RotateLeft(a2, 27); a3 = Integers.RotateLeft(a3, 30); |