diff options
Diffstat (limited to 'crypto/src/crypto/engines/PhotonBeetleEngine.cs')
| -rw-r--r-- | crypto/src/crypto/engines/PhotonBeetleEngine.cs | 44 |
1 files changed, 17 insertions, 27 deletions
diff --git a/crypto/src/crypto/engines/PhotonBeetleEngine.cs b/crypto/src/crypto/engines/PhotonBeetleEngine.cs index e593bb6f5..5d96213a1 100644 --- a/crypto/src/crypto/engines/PhotonBeetleEngine.cs +++ b/crypto/src/crypto/engines/PhotonBeetleEngine.cs @@ -14,7 +14,8 @@ namespace Org.BouncyCastle.Crypto.Engines * Photon-Beetle with reference to C Reference Impl from: https://github.com/PHOTON-Beetle/Software * </p> */ - public class PhotonBeetleEngine + public sealed class PhotonBeetleEngine + // TODO IAeadCipher only : IAeadBlockCipher { public enum PhotonBeetleParameters @@ -24,7 +25,7 @@ namespace Org.BouncyCastle.Crypto.Engines } private bool input_empty; - private bool forEncryption; + private bool forEncryption = true; // Safe output sizes before initialization private bool initialised; private byte[] K; private byte[] N; @@ -94,6 +95,7 @@ namespace Org.BouncyCastle.Crypto.Engines public string AlgorithmName => "Photon-Beetle AEAD"; + // TODO public IBlockCipher UnderlyingCipher => throw new NotImplementedException(); public byte[] GetMac() @@ -103,37 +105,33 @@ namespace Org.BouncyCastle.Crypto.Engines public int GetOutputSize(int len) { + // TODO return len + TAG_INBYTES; } public int GetUpdateOutputSize(int len) { + // TODO return len; } public void Init(bool forEncryption, ICipherParameters parameters) { this.forEncryption = forEncryption; - if (!(parameters is ParametersWithIV param)) - { + + if (!(parameters is ParametersWithIV ivParams)) throw new ArgumentException("Photon-Beetle AEAD init parameters must include an IV"); - } - ParametersWithIV ivParams = param; + N = ivParams.GetIV(); if (N == null || N.Length != CRYPTO_NPUBBYTES) - { throw new ArgumentException("Photon-Beetle AEAD requires exactly 16 bytes of IV"); - } - if (!(ivParams.Parameters is KeyParameter)) - { + + if (!(ivParams.Parameters is KeyParameter key)) throw new ArgumentException("Photon-Beetle AEAD init parameters must include a key"); - } - KeyParameter key = (KeyParameter)ivParams.Parameters; + K = key.GetKey(); if (K.Length != CRYPTO_KEYBYTES) - { throw new ArgumentException("Photon-Beetle AEAD key must be 128 bits long"); - } state = new byte[STATE_INBYTES]; state_2d = new byte[D][]; @@ -148,7 +146,7 @@ namespace Org.BouncyCastle.Crypto.Engines public void ProcessAadByte(byte input) { - aadData.Write(new byte[] { input }, 0, 1); + aadData.WriteByte(input); } public void ProcessAadBytes(byte[] inBytes, int inOff, int len) @@ -300,19 +298,11 @@ namespace Org.BouncyCastle.Crypto.Engines } if (forEncryption) { - XOR(plaintext, inOff, DBlen_inbytes); + Bytes.XorTo(DBlen_inbytes, plaintext, inOff, state, 0); } else { - XOR(ciphertext, inOff, DBlen_inbytes); - } - } - - void XOR(byte[] in_right, int rOff, int iolen_inbytes) - { - for (int i = 0; i < iolen_inbytes; i++) - { - state[i] ^= in_right[rOff++]; + Bytes.XorTo(DBlen_inbytes, ciphertext, inOff, state, 0); } } @@ -344,11 +334,11 @@ namespace Org.BouncyCastle.Crypto.Engines for (i = 0; i < Dlen_inblocks - 1; i++) { PHOTON_Permutation(); - XOR(A, i * RATE_INBYTES, RATE_INBYTES); + Bytes.XorTo(RATE_INBYTES, A, i * RATE_INBYTES, state, 0); } PHOTON_Permutation(); LastDBlocklen = adlen - i * RATE_INBYTES; - XOR(A, i * RATE_INBYTES, LastDBlocklen); + Bytes.XorTo(LastDBlocklen, A, i * RATE_INBYTES, state, 0); if (LastDBlocklen < RATE_INBYTES) { state[LastDBlocklen] ^= 0x01; // ozs |