diff options
Diffstat (limited to 'crypto/src')
| -rw-r--r-- | crypto/src/crypto/digests/ParallelHash.cs | 390 | ||||
| -rw-r--r-- | crypto/src/crypto/digests/TupleHash.cs | 234 | ||||
| -rw-r--r-- | crypto/src/crypto/fpe/FpeEngine.cs | 146 | ||||
| -rw-r--r-- | crypto/src/crypto/fpe/FpeFf1Engine.cs | 103 | ||||
| -rw-r--r-- | crypto/src/crypto/fpe/FpeFf3_1Engine.cs | 105 | ||||
| -rw-r--r-- | crypto/src/crypto/fpe/SP80038G.cs | 20 | ||||
| -rw-r--r-- | crypto/src/crypto/modes/GcmSivBlockCipher.cs | 1861 | ||||
| -rw-r--r-- | crypto/src/crypto/util/BasicAlphabetMapper.cs | 150 | ||||
| -rw-r--r-- | crypto/src/crypto/util/Pack.cs | 98 | ||||
| -rw-r--r-- | crypto/src/security/SecureRandom.cs | 4 | ||||
| -rw-r--r-- | crypto/src/util/Arrays.cs | 1 | ||||
| -rw-r--r-- | crypto/src/util/Bytes.cs | 4 | ||||
| -rw-r--r-- | crypto/src/util/Integers.cs | 4 | ||||
| -rw-r--r-- | crypto/src/util/Longs.cs | 4 | ||||
| -rw-r--r-- | crypto/src/util/io/Streams.cs | 8 |
15 files changed, 1557 insertions, 1575 deletions
diff --git a/crypto/src/crypto/digests/ParallelHash.cs b/crypto/src/crypto/digests/ParallelHash.cs index 1e42d86ab..7d9be7618 100644 --- a/crypto/src/crypto/digests/ParallelHash.cs +++ b/crypto/src/crypto/digests/ParallelHash.cs @@ -1,210 +1,210 @@ using System; -using System.Diagnostics; using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Crypto.Digests { - /// <summary> + /// <summary> /// ParallelHash - a hash designed to support the efficient hashing of very long strings, by taking advantage, - /// of the parallelism available in modern processors with an optional XOF mode. - /// <para> - /// From NIST Special Publication 800-185 - SHA-3 Derived Functions:cSHAKE, KMAC, TupleHash and ParallelHash - /// </para> + /// of the parallelism available in modern processors with an optional XOF mode. + /// <para> + /// From NIST Special Publication 800-185 - SHA-3 Derived Functions:cSHAKE, KMAC, TupleHash and ParallelHash + /// </para> /// </summary> - public class ParallelHash - : IXof, IDigest - { - private static readonly byte[] N_PARALLEL_HASH = Strings.ToByteArray("ParallelHash"); - - private readonly CShakeDigest cshake; - private readonly CShakeDigest compressor; - private readonly int bitLength; - private readonly int outputLength; - private readonly int B; - private readonly byte[] buffer; - private readonly byte[] compressorBuffer; - - private bool firstOutput; - private int nCount; - private int bufOff; - - /** + public class ParallelHash + : IXof, IDigest + { + private static readonly byte[] N_PARALLEL_HASH = Strings.ToByteArray("ParallelHash"); + + private readonly CShakeDigest cshake; + private readonly CShakeDigest compressor; + private readonly int bitLength; + private readonly int outputLength; + private readonly int B; + private readonly byte[] buffer; + private readonly byte[] compressorBuffer; + + private bool firstOutput; + private int nCount; + private int bufOff; + + /** * Base constructor. * * @param bitLength bit length of the underlying SHAKE function, 128 or 256. * @param S the customization string - available for local use. * @param B the blocksize (in bytes) for hashing. */ - public ParallelHash(int bitLength, byte[] S, int B): this(bitLength, S, B, bitLength * 2) - { - - } - - public ParallelHash(int bitLength, byte[] S, int B, int outputSize) - { - this.cshake = new CShakeDigest(bitLength, N_PARALLEL_HASH, S); - this.compressor = new CShakeDigest(bitLength, new byte[0], new byte[0]); - this.bitLength = bitLength; - this.B = B; - this.outputLength = (outputSize + 7) / 8; - this.buffer = new byte[B]; - this.compressorBuffer = new byte[bitLength * 2 / 8]; - - Reset(); - } - - public ParallelHash(ParallelHash source) - { - this.cshake = new CShakeDigest(source.cshake); - this.compressor = new CShakeDigest(source.compressor); - this.bitLength = source.bitLength; - this.B = source.B; - this.outputLength = source.outputLength; - this.buffer = Arrays.Clone(source.buffer); - this.compressorBuffer = Arrays.Clone(source.compressorBuffer); - } - - public string AlgorithmName - { - get { return "ParallelHash" + cshake.AlgorithmName.Substring(6); } - } - - public int GetByteLength() - { - return cshake.GetByteLength(); - } - - public int GetDigestSize() - { - return outputLength; - } - - public void Update(byte b) - { - buffer[bufOff++] = b; - if (bufOff == buffer.Length) - { - compress(); - } - } - - public void BlockUpdate(byte[] inBuf, int inOff, int len) - { - len = System.Math.Max(0, len); - - // - // fill the current word - // - int i = 0; - if (bufOff != 0) - { - while (i < len && bufOff != buffer.Length) - { - buffer[bufOff++] = inBuf[inOff + i++]; - } - - if (bufOff == buffer.Length) - { - compress(); - } - } - - if (i < len) - { - while (len - i > B) - { - compress(inBuf, inOff + i, B); - i += B; - } - } - - while (i < len) - { - Update(inBuf[inOff + i++]); - } - } - - private void compress() - { - compress(buffer, 0, bufOff); - bufOff = 0; - } - - private void compress(byte[] buf, int offSet, int len) - { - compressor.BlockUpdate(buf, offSet, len); - compressor.DoFinal(compressorBuffer, 0, compressorBuffer.Length); - - cshake.BlockUpdate(compressorBuffer, 0, compressorBuffer.Length); - - nCount++; - } - - private void wrapUp(int outputSize) - { - if (bufOff != 0) - { - compress(); - } - byte[] nOut = XofUtilities.RightEncode(nCount); - byte[] encOut = XofUtilities.RightEncode(outputSize * 8); - - cshake.BlockUpdate(nOut, 0, nOut.Length); - cshake.BlockUpdate(encOut, 0, encOut.Length); - - firstOutput = false; - } - - public int DoFinal(byte[] outBuf, int outOff) - { - if (firstOutput) - { - wrapUp(outputLength); - } - - int rv = cshake.DoFinal(outBuf, outOff, GetDigestSize()); - - Reset(); - - return rv; - } - - public int DoFinal(byte[] outBuf, int outOff, int outLen) - { - if (firstOutput) - { - wrapUp(outputLength); - } - - int rv = cshake.DoFinal(outBuf, outOff, outLen); - - Reset(); - - return rv; - } - - public int DoOutput(byte[] outBuf, int outOff, int outLen) - { - if (firstOutput) - { - wrapUp(0); - } - - return cshake.DoOutput(outBuf, outOff, outLen); - } - - public void Reset() - { - cshake.Reset(); - Arrays.Clear(buffer); - - byte[] hdr = XofUtilities.LeftEncode(B); - cshake.BlockUpdate(hdr, 0, hdr.Length); - - nCount = 0; - bufOff = 0; - firstOutput = true; - } - } + public ParallelHash(int bitLength, byte[] S, int B) + : this(bitLength, S, B, bitLength * 2) + { + + } + + public ParallelHash(int bitLength, byte[] S, int B, int outputSize) + { + this.cshake = new CShakeDigest(bitLength, N_PARALLEL_HASH, S); + this.compressor = new CShakeDigest(bitLength, new byte[0], new byte[0]); + this.bitLength = bitLength; + this.B = B; + this.outputLength = (outputSize + 7) / 8; + this.buffer = new byte[B]; + this.compressorBuffer = new byte[bitLength * 2 / 8]; + + Reset(); + } + + public ParallelHash(ParallelHash source) + { + this.cshake = new CShakeDigest(source.cshake); + this.compressor = new CShakeDigest(source.compressor); + this.bitLength = source.bitLength; + this.B = source.B; + this.outputLength = source.outputLength; + this.buffer = Arrays.Clone(source.buffer); + this.compressorBuffer = Arrays.Clone(source.compressorBuffer); + } + + public virtual string AlgorithmName + { + get { return "ParallelHash" + cshake.AlgorithmName.Substring(6); } + } + + public virtual int GetByteLength() + { + return cshake.GetByteLength(); + } + + public virtual int GetDigestSize() + { + return outputLength; + } + + public virtual void Update(byte b) + { + buffer[bufOff++] = b; + if (bufOff == buffer.Length) + { + compress(); + } + } + + public virtual void BlockUpdate(byte[] inBuf, int inOff, int len) + { + len = System.Math.Max(0, len); + + // + // fill the current word + // + int i = 0; + if (bufOff != 0) + { + while (i < len && bufOff != buffer.Length) + { + buffer[bufOff++] = inBuf[inOff + i++]; + } + + if (bufOff == buffer.Length) + { + compress(); + } + } + + if (i < len) + { + while (len - i > B) + { + compress(inBuf, inOff + i, B); + i += B; + } + } + + while (i < len) + { + Update(inBuf[inOff + i++]); + } + } + + private void compress() + { + compress(buffer, 0, bufOff); + bufOff = 0; + } + + private void compress(byte[] buf, int offSet, int len) + { + compressor.BlockUpdate(buf, offSet, len); + compressor.DoFinal(compressorBuffer, 0, compressorBuffer.Length); + + cshake.BlockUpdate(compressorBuffer, 0, compressorBuffer.Length); + + nCount++; + } + + private void wrapUp(int outputSize) + { + if (bufOff != 0) + { + compress(); + } + byte[] nOut = XofUtilities.RightEncode(nCount); + byte[] encOut = XofUtilities.RightEncode(outputSize * 8); + + cshake.BlockUpdate(nOut, 0, nOut.Length); + cshake.BlockUpdate(encOut, 0, encOut.Length); + + firstOutput = false; + } + + public virtual int DoFinal(byte[] outBuf, int outOff) + { + if (firstOutput) + { + wrapUp(outputLength); + } + + int rv = cshake.DoFinal(outBuf, outOff, GetDigestSize()); + + Reset(); + + return rv; + } + + public virtual int DoFinal(byte[] outBuf, int outOff, int outLen) + { + if (firstOutput) + { + wrapUp(outputLength); + } + + int rv = cshake.DoFinal(outBuf, outOff, outLen); + + Reset(); + + return rv; + } + + public virtual int DoOutput(byte[] outBuf, int outOff, int outLen) + { + if (firstOutput) + { + wrapUp(0); + } + + return cshake.DoOutput(outBuf, outOff, outLen); + } + + public virtual void Reset() + { + cshake.Reset(); + Arrays.Clear(buffer); + + byte[] hdr = XofUtilities.LeftEncode(B); + cshake.BlockUpdate(hdr, 0, hdr.Length); + + nCount = 0; + bufOff = 0; + firstOutput = true; + } + } } diff --git a/crypto/src/crypto/digests/TupleHash.cs b/crypto/src/crypto/digests/TupleHash.cs index 76bba3f94..98c2d2acf 100644 --- a/crypto/src/crypto/digests/TupleHash.cs +++ b/crypto/src/crypto/digests/TupleHash.cs @@ -1,134 +1,134 @@ using System; -using System.Diagnostics; using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Crypto.Digests { - /// <summary> + /// <summary> /// TupleHash - a hash designed to simply hash a tuple of input strings, any or all of which may be empty strings, - /// in an unambiguous way with an optional XOF mode. - /// <para> - /// From NIST Special Publication 800-185 - SHA-3 Derived Functions:cSHAKE, KMAC, TupleHash and ParallelHash - /// </para> + /// in an unambiguous way with an optional XOF mode. + /// <para> + /// From NIST Special Publication 800-185 - SHA-3 Derived Functions:cSHAKE, KMAC, TupleHash and ParallelHash + /// </para> /// </summary> - public class TupleHash - : IXof, IDigest - { - private static readonly byte[] N_TUPLE_HASH = Strings.ToByteArray("TupleHash"); + public class TupleHash + : IXof, IDigest + { + private static readonly byte[] N_TUPLE_HASH = Strings.ToByteArray("TupleHash"); - private readonly CShakeDigest cshake; - private readonly int bitLength; - private readonly int outputLength; + private readonly CShakeDigest cshake; + private readonly int bitLength; + private readonly int outputLength; - private bool firstOutput; + private bool firstOutput; - /** + /** * Base constructor. * * @param bitLength bit length of the underlying SHAKE function, 128 or 256. * @param S the customization string - available for local use. */ - public TupleHash(int bitLength, byte[] S): this(bitLength, S, bitLength * 2) - { - - } - - public TupleHash(int bitLength, byte[] S, int outputSize) - { - this.cshake = new CShakeDigest(bitLength, N_TUPLE_HASH, S); - this.bitLength = bitLength; - this.outputLength = (outputSize + 7) / 8; - - Reset(); - } - - public TupleHash(TupleHash original) - { - this.cshake = new CShakeDigest(original.cshake); - this.bitLength = cshake.fixedOutputLength; - this.outputLength = bitLength * 2 / 8; - this.firstOutput = original.firstOutput; - } - - public string AlgorithmName - { - get { return "TupleHash" + cshake.AlgorithmName.Substring(6); } - } - - public int GetByteLength() - { - return cshake.GetByteLength(); - } - - public int GetDigestSize() - { - return outputLength; - } - - public void Update(byte b) - { - byte[] bytes = XofUtilities.Encode(b); - cshake.BlockUpdate(bytes, 0, bytes.Length); - } - - public void BlockUpdate(byte[] inBuf, int inOff, int len) - { - byte[] bytes = XofUtilities.Encode(inBuf, inOff, len); - cshake.BlockUpdate(bytes, 0, bytes.Length); - } - - private void wrapUp(int outputSize) - { - byte[] encOut = XofUtilities.RightEncode(outputSize * 8); - - cshake.BlockUpdate(encOut, 0, encOut.Length); - - firstOutput = false; - } - - public int DoFinal(byte[] outBuf, int outOff) - { - if (firstOutput) - { - wrapUp(GetDigestSize()); - } - - int rv = cshake.DoFinal(outBuf, outOff, GetDigestSize()); - - Reset(); - - return rv; - } - - public int DoFinal(byte[] outBuf, int outOff, int outLen) - { - if (firstOutput) - { - wrapUp(GetDigestSize()); - } - - int rv = cshake.DoFinal(outBuf, outOff, outLen); - - Reset(); - - return rv; - } - - public int DoOutput(byte[] outBuf, int outOff, int outLen) - { - if (firstOutput) - { - wrapUp(0); - } - - return cshake.DoOutput(outBuf, outOff, outLen); - } - - public void Reset() - { - cshake.Reset(); - firstOutput = true; - } - } + public TupleHash(int bitLength, byte[] S) + : this(bitLength, S, bitLength * 2) + { + + } + + public TupleHash(int bitLength, byte[] S, int outputSize) + { + this.cshake = new CShakeDigest(bitLength, N_TUPLE_HASH, S); + this.bitLength = bitLength; + this.outputLength = (outputSize + 7) / 8; + + Reset(); + } + + public TupleHash(TupleHash original) + { + this.cshake = new CShakeDigest(original.cshake); + this.bitLength = cshake.fixedOutputLength; + this.outputLength = bitLength * 2 / 8; + this.firstOutput = original.firstOutput; + } + + public virtual string AlgorithmName + { + get { return "TupleHash" + cshake.AlgorithmName.Substring(6); } + } + + public virtual int GetByteLength() + { + return cshake.GetByteLength(); + } + + public virtual int GetDigestSize() + { + return outputLength; + } + + public virtual void Update(byte b) + { + byte[] bytes = XofUtilities.Encode(b); + cshake.BlockUpdate(bytes, 0, bytes.Length); + } + + public virtual void BlockUpdate(byte[] inBuf, int inOff, int len) + { + byte[] bytes = XofUtilities.Encode(inBuf, inOff, len); + cshake.BlockUpdate(bytes, 0, bytes.Length); + } + + private void wrapUp(int outputSize) + { + byte[] encOut = XofUtilities.RightEncode(outputSize * 8); + + cshake.BlockUpdate(encOut, 0, encOut.Length); + + firstOutput = false; + } + + public virtual int DoFinal(byte[] outBuf, int outOff) + { + if (firstOutput) + { + wrapUp(GetDigestSize()); + } + + int rv = cshake.DoFinal(outBuf, outOff, GetDigestSize()); + + Reset(); + + return rv; + } + + public virtual int DoFinal(byte[] outBuf, int outOff, int outLen) + { + if (firstOutput) + { + wrapUp(GetDigestSize()); + } + + int rv = cshake.DoFinal(outBuf, outOff, outLen); + + Reset(); + + return rv; + } + + public virtual int DoOutput(byte[] outBuf, int outOff, int outLen) + { + if (firstOutput) + { + wrapUp(0); + } + + return cshake.DoOutput(outBuf, outOff, outLen); + } + + public virtual void Reset() + { + cshake.Reset(); + firstOutput = true; + } + } } diff --git a/crypto/src/crypto/fpe/FpeEngine.cs b/crypto/src/crypto/fpe/FpeEngine.cs index 6757bad3a..5545b7dca 100644 --- a/crypto/src/crypto/fpe/FpeEngine.cs +++ b/crypto/src/crypto/fpe/FpeEngine.cs @@ -1,121 +1,73 @@ using System; -using System.Diagnostics; -using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Parameters; -using Org.BouncyCastle.Crypto.Utilities; -using Org.BouncyCastle.Math; using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Crypto.Fpe { -/** - * Base class for format-preserving encryption. - */ -public abstract class FpeEngine -{ - protected IBlockCipher baseCipher; - - protected bool forEncryption; - protected FpeParameters fpeParameters; - - protected FpeEngine(IBlockCipher baseCipher) + /// <summary>Base class for format-preserving encryption.</summary> + public abstract class FpeEngine { - this.baseCipher = baseCipher; - } - - /// <summary> - /// Process length bytes from inBuf, writing the output to outBuf. - /// </summary> - /// <returns>number of bytes output.</returns> - /// <param name="inBuf">input data.</param> - /// <param name="inOff">offset in input data to start at.</param> - /// <param name="length">number of bytes to process.</param> - /// <param name="outBuf">destination buffer.</param> - /// <param name="outOff">offset to start writing at in destination buffer.</param> - public int ProcessBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) - { - if (fpeParameters == null) - { - throw new InvalidOperationException("FPE engine not initialized"); - } - - if (length < 0) - { - throw new ArgumentException("input length cannot be negative"); - } + protected readonly IBlockCipher baseCipher; - if (inBuf == null || outBuf == null) - { - throw new NullReferenceException("buffer value is null"); - } + protected bool forEncryption; + protected FpeParameters fpeParameters; - if (inBuf.Length < inOff + length) + protected FpeEngine(IBlockCipher baseCipher) { - throw new DataLengthException("input buffer too short"); + this.baseCipher = baseCipher; } - if (outBuf.Length < outOff + length) - { - throw new OutputLengthException("output buffer too short"); - } - - if (forEncryption) - { - return encryptBlock(inBuf, inOff, length, outBuf, outOff); - } - else + /// <summary> + /// Process length bytes from inBuf, writing the output to outBuf. + /// </summary> + /// <returns>number of bytes output.</returns> + /// <param name="inBuf">input data.</param> + /// <param name="inOff">offset in input data to start at.</param> + /// <param name="length">number of bytes to process.</param> + /// <param name="outBuf">destination buffer.</param> + /// <param name="outOff">offset to start writing at in destination buffer.</param> + public virtual int ProcessBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) { - return decryptBlock(inBuf, inOff, length, outBuf, outOff); + if (fpeParameters == null) + throw new InvalidOperationException("FPE engine not initialized"); + if (length < 0) + throw new ArgumentException("cannot be negative", "length"); + if (inBuf == null) + throw new ArgumentNullException("inBuf"); + if (outBuf == null) + throw new ArgumentNullException("outBuf"); + + Check.DataLength(inBuf, inOff, length, "input buffer too short"); + Check.OutputLength(outBuf, outOff, length, "output buffer too short"); + + if (forEncryption) + { + return EncryptBlock(inBuf, inOff, length, outBuf, outOff); + } + else + { + return DecryptBlock(inBuf, inOff, length, outBuf, outOff); + } } - } - protected static ushort[] toShortArray(byte[] buf) - { - if ((buf.Length & 1) != 0) + protected static bool IsOverrideSet(string propName) { - throw new ArgumentException("data must be an even number of bytes for a wide radix"); - } + string propValue = Platform.GetEnvironmentVariable(propName); - ushort[] rv = new ushort[buf.Length / 2]; - - for (int i = 0; i != rv.Length; i++) - { - rv[i] = Pack.BE_To_UInt16(buf, i * 2); + return propValue != null && Platform.EqualsIgnoreCase("true", propValue); } - return rv; - } - - protected static bool IsOverrideSet(string propName) - { - string propValue = Platform.GetEnvironmentVariable(propName); - - return propValue == null || Platform.EqualsIgnoreCase("true", propValue); - } - - protected static byte[] toByteArray(ushort[] buf) - { - byte[] rv = new byte[buf.Length * 2]; + /// <summary> + /// Initialize the FPE engine for encryption/decryption. + /// </summary> + /// <returns>number of bytes output.</returns> + /// <param name="forEncryption">true if initialising for encryption, false otherwise.</param> + /// <param name="parameters ">the key and other parameters to use to set the engine up.</param> + public abstract void Init(bool forEncryption, ICipherParameters parameters); - for (int i = 0; i != buf.Length; i++) - { - Pack.UInt16_To_BE(buf[i], rv, i * 2); - } + protected abstract int EncryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff); - return rv; + protected abstract int DecryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff); } - - /// <summary> - /// Initialize the FPE engine for encryption/decryption. - /// </summary> - /// <returns>number of bytes output.</returns> - /// <param name="forEncryption">true if initialising for encryption, false otherwise.</param> - /// <param name="parameters ">the key and other parameters to use to set the engine up.</param> - public abstract void Init(bool forEncryption, ICipherParameters parameters); - - protected abstract int encryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff); - - protected abstract int decryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff); -} } diff --git a/crypto/src/crypto/fpe/FpeFf1Engine.cs b/crypto/src/crypto/fpe/FpeFf1Engine.cs index 8f34ef888..acd31b6f4 100644 --- a/crypto/src/crypto/fpe/FpeFf1Engine.cs +++ b/crypto/src/crypto/fpe/FpeFf1Engine.cs @@ -1,70 +1,83 @@ using System; -using System.Diagnostics; using Org.BouncyCastle.Crypto.Engines; using Org.BouncyCastle.Crypto.Parameters; +using Org.BouncyCastle.Crypto.Utilities; namespace Org.BouncyCastle.Crypto.Fpe { -public class FpeFf1Engine - : FpeEngine -{ - public FpeFf1Engine(): this(new AesEngine()) - { - } - - public FpeFf1Engine(IBlockCipher baseCipher): base(baseCipher) + public class FpeFf1Engine + : FpeEngine { - if (IsOverrideSet(SP80038G.FPE_DISABLED) - || IsOverrideSet(SP80038G.FF1_DISABLED)) + public FpeFf1Engine() + : this(new AesEngine()) { - throw new InvalidOperationException("FF1 encryption disabled"); } - } - - public override void Init(bool forEncryption, ICipherParameters parameters) - { - this.forEncryption = forEncryption; - this.fpeParameters = (FpeParameters)parameters; - - baseCipher.Init(!fpeParameters.UseInverseFunction, fpeParameters.Key); - } - - protected override int encryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) - { - byte[] enc; - - if (fpeParameters.Radix > 256) + public FpeFf1Engine(IBlockCipher baseCipher) + : base(baseCipher) { - enc = toByteArray(SP80038G.EncryptFF1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), toShortArray(inBuf), inOff, length / 2)); + if (IsOverrideSet(SP80038G.FPE_DISABLED) || + IsOverrideSet(SP80038G.FF1_DISABLED)) + { + throw new InvalidOperationException("FF1 encryption disabled"); + } } - else + + public override void Init(bool forEncryption, ICipherParameters parameters) { - enc = SP80038G.EncryptFF1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); + this.forEncryption = forEncryption; + this.fpeParameters = (FpeParameters)parameters; + + baseCipher.Init(!fpeParameters.UseInverseFunction, fpeParameters.Key); } - Array.Copy(enc, 0, outBuf, outOff, length); + protected override int EncryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) + { + byte[] enc; - return length; - } + if (fpeParameters.Radix > 256) + { + if ((length & 1) != 0) + throw new ArgumentException("input must be an even number of bytes for a wide radix"); - protected override int decryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) - { - byte[] dec; + ushort[] u16In = Pack.BE_To_UInt16(inBuf, inOff, length); + ushort[] u16Out = SP80038G.EncryptFF1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), + u16In, 0, u16In.Length); + enc = Pack.UInt16_To_BE(u16Out, 0, u16Out.Length); + } + else + { + enc = SP80038G.EncryptFF1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); + } - if (fpeParameters.Radix > 256) - { - dec = toByteArray(SP80038G.DecryptFF1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), toShortArray(inBuf), inOff, length / 2)); + Array.Copy(enc, 0, outBuf, outOff, length); + + return length; } - else + + protected override int DecryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) { - dec = SP80038G.DecryptFF1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); - } + byte[] dec; + + if (fpeParameters.Radix > 256) + { + if ((length & 1) != 0) + throw new ArgumentException("input must be an even number of bytes for a wide radix"); - Array.Copy(dec, 0, outBuf, outOff, length); + ushort[] u16In = Pack.BE_To_UInt16(inBuf, inOff, length); + ushort[] u16Out = SP80038G.DecryptFF1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), + u16In, 0, u16In.Length); + dec = Pack.UInt16_To_BE(u16Out, 0, u16Out.Length); + } + else + { + dec = SP80038G.DecryptFF1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); + } - return length; + Array.Copy(dec, 0, outBuf, outOff, length); + + return length; + } } } -} diff --git a/crypto/src/crypto/fpe/FpeFf3_1Engine.cs b/crypto/src/crypto/fpe/FpeFf3_1Engine.cs index 480560bb2..aa238e46a 100644 --- a/crypto/src/crypto/fpe/FpeFf3_1Engine.cs +++ b/crypto/src/crypto/fpe/FpeFf3_1Engine.cs @@ -1,75 +1,86 @@ using System; -using System.Diagnostics; using Org.BouncyCastle.Crypto.Parameters; using Org.BouncyCastle.Crypto.Engines; +using Org.BouncyCastle.Crypto.Utilities; using Org.BouncyCastle.Utilities; namespace Org.BouncyCastle.Crypto.Fpe { -public class FpeFf3_1Engine - : FpeEngine -{ - public FpeFf3_1Engine(): this(new AesEngine()) - { - } - - public FpeFf3_1Engine(IBlockCipher baseCipher): base(baseCipher) + public class FpeFf3_1Engine + : FpeEngine { - if (IsOverrideSet(SP80038G.FPE_DISABLED)) + public FpeFf3_1Engine() + : this(new AesEngine()) { - throw new InvalidOperationException("FPE disabled"); } - } - - public override void Init(bool forEncryption, ICipherParameters parameters) - { - this.forEncryption = forEncryption; - this.fpeParameters = (FpeParameters)parameters; - - baseCipher.Init(!fpeParameters.UseInverseFunction, new KeyParameter(Arrays.Reverse(fpeParameters.Key.GetKey()))); - - if (fpeParameters.GetTweak().Length != 7) + public FpeFf3_1Engine(IBlockCipher baseCipher) + : base(baseCipher) { - throw new ArgumentException("tweak should be 56 bits"); + if (IsOverrideSet(SP80038G.FPE_DISABLED)) + { + throw new InvalidOperationException("FPE disabled"); + } } - } - protected override int encryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) - { - byte[] enc; - - if (fpeParameters.Radix > 256) + public override void Init(bool forEncryption, ICipherParameters parameters) { - enc = toByteArray(SP80038G.EncryptFF3_1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), toShortArray(inBuf), inOff, length / 2)); + this.forEncryption = forEncryption; + this.fpeParameters = (FpeParameters)parameters; + + baseCipher.Init(!fpeParameters.UseInverseFunction, new KeyParameter(Arrays.Reverse(fpeParameters.Key.GetKey()))); + + if (fpeParameters.GetTweak().Length != 7) + throw new ArgumentException("tweak should be 56 bits"); } - else + + protected override int EncryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) { - enc = SP80038G.EncryptFF3_1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); - } + byte[] enc; - Array.Copy(enc, 0, outBuf, outOff, length); + if (fpeParameters.Radix > 256) + { + if ((length & 1) != 0) + throw new ArgumentException("input must be an even number of bytes for a wide radix"); - return length; - } + ushort[] u16In = Pack.BE_To_UInt16(inBuf, inOff, length); + ushort[] u16Out = SP80038G.EncryptFF3_1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), + u16In, 0, u16In.Length); + enc = Pack.UInt16_To_BE(u16Out, 0, u16Out.Length); + } + else + { + enc = SP80038G.EncryptFF3_1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); + } - protected override int decryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) - { - byte[] dec; + Array.Copy(enc, 0, outBuf, outOff, length); - if (fpeParameters.Radix > 256) - { - dec = toByteArray(SP80038G.DecryptFF3_1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), toShortArray(inBuf), inOff, length / 2)); + return length; } - else + + protected override int DecryptBlock(byte[] inBuf, int inOff, int length, byte[] outBuf, int outOff) { - dec = SP80038G.DecryptFF3_1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); - } + byte[] dec; + + if (fpeParameters.Radix > 256) + { + if ((length & 1) != 0) + throw new ArgumentException("input must be an even number of bytes for a wide radix"); - Array.Copy(dec, 0, outBuf, outOff, length); + ushort[] u16In = Pack.BE_To_UInt16(inBuf, inOff, length); + ushort[] u16Out = SP80038G.DecryptFF3_1w(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), + u16In, 0, u16In.Length); + dec = Pack.UInt16_To_BE(u16Out, 0, u16Out.Length); + } + else + { + dec = SP80038G.DecryptFF3_1(baseCipher, fpeParameters.Radix, fpeParameters.GetTweak(), inBuf, inOff, length); + } - return length; + Array.Copy(dec, 0, outBuf, outOff, length); + + return length; + } } } -} diff --git a/crypto/src/crypto/fpe/SP80038G.cs b/crypto/src/crypto/fpe/SP80038G.cs index 4ce89c9b2..53efc1499 100644 --- a/crypto/src/crypto/fpe/SP80038G.cs +++ b/crypto/src/crypto/fpe/SP80038G.cs @@ -1,8 +1,5 @@ using System; -using System.Diagnostics; -using Org.BouncyCastle.Crypto; -using Org.BouncyCastle.Crypto.Parameters; using Org.BouncyCastle.Crypto.Utilities; using Org.BouncyCastle.Math; using Org.BouncyCastle.Utilities; @@ -685,14 +682,13 @@ namespace Org.BouncyCastle.Crypto.Fpe return s; } - private static int Ceil(double v) - { - int rv = (int)v; - if ((double)rv < v) - { - return rv + 1; - } - return rv; - } + private static int Ceil(double v) + { + int rv = (int)v; + if ((double)rv < v) + return rv + 1; + + return rv; + } } } diff --git a/crypto/src/crypto/modes/GcmSivBlockCipher.cs b/crypto/src/crypto/modes/GcmSivBlockCipher.cs index e54f1c201..10e7e774b 100644 --- a/crypto/src/crypto/modes/GcmSivBlockCipher.cs +++ b/crypto/src/crypto/modes/GcmSivBlockCipher.cs @@ -1,964 +1,931 @@ using System; -using System.Diagnostics; +using System.IO; -using Org.BouncyCastle.Utilities.IO; -using Org.BouncyCastle.Crypto.Macs; using Org.BouncyCastle.Crypto.Engines; -using Org.BouncyCastle.Crypto.Modes; using Org.BouncyCastle.Crypto.Modes.Gcm; using Org.BouncyCastle.Crypto.Parameters; using Org.BouncyCastle.Crypto.Utilities; using Org.BouncyCastle.Utilities; +using Org.BouncyCastle.Utilities.IO; namespace Org.BouncyCastle.Crypto.Modes { - /** - * GCM-SIV Mode. - * <p>It should be noted that the specified limit of 2<sup>36</sup> bytes is not supported. This is because all bytes are - * cached in a <b>ByteArrayOutputStream</b> object (which has a limit of a little less than 2<sup>31</sup> bytes), - * and are output on the <b>DoFinal</b>() call (which can only process a maximum of 2<sup>31</sup> bytes).</p> - * <p>The practical limit of 2<sup>31</sup> - 24 bytes is policed, and attempts to breach the limit will be rejected</p> - * <p>In order to properly support the higher limit, an extended form of <b>ByteArrayOutputStream</b> would be needed - * which would use multiple arrays to store the data. In addition, a new <b>doOutput</b> method would be required (similar - * to that in <b>XOF</b> digests), which would allow the data to be output over multiple calls. Alternatively an extended - * form of <b>ByteArrayInputStream</b> could be used to deliver the data.</p> - */ - public class GcmSivBlockCipher - : IAeadBlockCipher - { - /** - * The buffer length. - */ - private static readonly int BUFLEN = 16; - - /** - * The halfBuffer length. - */ - private static readonly int HALFBUFLEN = BUFLEN >> 1; - - /** - * The nonce length. - */ - private static readonly int NONCELEN = 12; - - /** - * The maximum data length (AEAD/PlainText). Due to implementation constraints this is restricted to the maximum - * array length (https://programming.guide/java/array-maximum-length.html) minus the BUFLEN to allow for the MAC - */ - private static readonly int MAX_DATALEN = Int32.MaxValue - 8 - BUFLEN; - - /** - * The top bit mask. - */ - private static readonly byte MASK = (byte) 0x80; - - /** - * The addition constant. - */ - private static readonly byte ADD = (byte) 0xE1; - - /** - * The initialisation flag. - */ - private static readonly int INIT = 1; - - /** - * The aeadComplete flag. - */ - private static readonly int AEAD_COMPLETE = 2; - - /** - * The cipher. - */ - private readonly IBlockCipher theCipher; - - /** - * The multiplier. - */ - private readonly IGcmMultiplier theMultiplier; - - /** - * The gHash buffer. - */ - internal readonly byte[] theGHash = new byte[BUFLEN]; - - /** - * The reverse buffer. - */ - internal readonly byte[] theReverse = new byte[BUFLEN]; - - /** - * The aeadHasher. - */ - private readonly GCMSIVHasher theAEADHasher; - - /** - * The dataHasher. - */ - private readonly GCMSIVHasher theDataHasher; - - /** - * The plainDataStream. - */ - private GCMSIVCache thePlain; - - /** - * The encryptedDataStream (decryption only). - */ - private GCMSIVCache theEncData; - - /** - * Are we encrypting? - */ - private bool forEncryption; - - /** - * The initialAEAD. - */ - private byte[] theInitialAEAD; - - /** - * The nonce. - */ - private byte[] theNonce; - - /** - * The flags. - */ - private int theFlags; - - /** - * Constructor. - */ - public GcmSivBlockCipher(): this(new AesEngine()) - { - - } - - /** - * Constructor. - * @param pCipher the underlying cipher - */ - public GcmSivBlockCipher(IBlockCipher pCipher): this(pCipher, new Tables4kGcmMultiplier()) - { - - } - - /** - * Constructor. - * @param pCipher the underlying cipher - * @param pMultiplier the multiplier - */ - public GcmSivBlockCipher(IBlockCipher pCipher, - IGcmMultiplier pMultiplier) - { - /* Ensure that the cipher is the correct size */ - if (pCipher.GetBlockSize() != BUFLEN) - { - throw new ArgumentException("Cipher required with a block size of " + BUFLEN + "."); - } - - /* Store parameters */ - theCipher = pCipher; - theMultiplier = pMultiplier; - - /* Create the hashers */ - theAEADHasher = new GCMSIVHasher(this); - theDataHasher = new GCMSIVHasher(this); - } - - public IBlockCipher GetUnderlyingCipher() - { - return theCipher; - } + /** + * GCM-SIV Mode. + * <p>It should be noted that the specified limit of 2<sup>36</sup> bytes is not supported. This is because all bytes are + * cached in a <b>ByteArrayOutputStream</b> object (which has a limit of a little less than 2<sup>31</sup> bytes), + * and are output on the <b>DoFinal</b>() call (which can only process a maximum of 2<sup>31</sup> bytes).</p> + * <p>The practical limit of 2<sup>31</sup> - 24 bytes is policed, and attempts to breach the limit will be rejected</p> + * <p>In order to properly support the higher limit, an extended form of <b>ByteArrayOutputStream</b> would be needed + * which would use multiple arrays to store the data. In addition, a new <b>doOutput</b> method would be required (similar + * to that in <b>XOF</b> digests), which would allow the data to be output over multiple calls. Alternatively an extended + * form of <b>ByteArrayInputStream</b> could be used to deliver the data.</p> + */ + public class GcmSivBlockCipher + : IAeadBlockCipher + { + /// <summary>The buffer length.</summary> + private static readonly int BUFLEN = 16; + + /// <summary>The halfBuffer length.</summary> + private static readonly int HALFBUFLEN = BUFLEN >> 1; + + /// <summary>The nonce length.</summary> + private static readonly int NONCELEN = 12; + + /** + * The maximum data length (AEAD/PlainText). Due to implementation constraints this is restricted to the maximum + * array length (https://programming.guide/java/array-maximum-length.html) minus the BUFLEN to allow for the MAC + */ + private static readonly int MAX_DATALEN = Int32.MaxValue - 8 - BUFLEN; + + /** + * The top bit mask. + */ + private static readonly byte MASK = (byte)0x80; + + /** + * The addition constant. + */ + private static readonly byte ADD = (byte)0xE1; + + /** + * The initialisation flag. + */ + private static readonly int INIT = 1; + + /** + * The aeadComplete flag. + */ + private static readonly int AEAD_COMPLETE = 2; + + /** + * The cipher. + */ + private readonly IBlockCipher theCipher; + + /** + * The multiplier. + */ + private readonly IGcmMultiplier theMultiplier; + + /** + * The gHash buffer. + */ + internal readonly byte[] theGHash = new byte[BUFLEN]; + + /** + * The reverse buffer. + */ + internal readonly byte[] theReverse = new byte[BUFLEN]; + + /** + * The aeadHasher. + */ + private readonly GcmSivHasher theAEADHasher; + + /** + * The dataHasher. + */ + private readonly GcmSivHasher theDataHasher; + + /** + * The plainDataStream. + */ + private GcmSivCache thePlain; + + /** + * The encryptedDataStream (decryption only). + */ + private GcmSivCache theEncData; + + /** + * Are we encrypting? + */ + private bool forEncryption; + + /** + * The initialAEAD. + */ + private byte[] theInitialAEAD; + + /** + * The nonce. + */ + private byte[] theNonce; + + /** + * The flags. + */ + private int theFlags; + + /** + * Constructor. + */ + public GcmSivBlockCipher() + : this(new AesEngine()) + { + } + + /** + * Constructor. + * @param pCipher the underlying cipher + */ + public GcmSivBlockCipher(IBlockCipher pCipher) + : this(pCipher, new Tables4kGcmMultiplier()) + { + } + + /** + * Constructor. + * @param pCipher the underlying cipher + * @param pMultiplier the multiplier + */ + public GcmSivBlockCipher(IBlockCipher pCipher, IGcmMultiplier pMultiplier) + { + /* Ensure that the cipher is the correct size */ + if (pCipher.GetBlockSize() != BUFLEN) + throw new ArgumentException("Cipher required with a block size of " + BUFLEN + "."); + + /* Store parameters */ + theCipher = pCipher; + theMultiplier = pMultiplier; + + /* Create the hashers */ + theAEADHasher = new GcmSivHasher(this); + theDataHasher = new GcmSivHasher(this); + } + + public virtual IBlockCipher GetUnderlyingCipher() + { + return theCipher; + } public virtual int GetBlockSize() { return theCipher.GetBlockSize(); } - public void Init(bool pEncrypt, - ICipherParameters cipherParameters) - { - /* Set defaults */ - byte[] myInitialAEAD = null; - byte[] myNonce = null; - KeyParameter myKey = null; - - /* Access parameters */ - if (cipherParameters is AeadParameters) - { - AeadParameters myAEAD = (AeadParameters) cipherParameters; - myInitialAEAD = myAEAD.GetAssociatedText(); - myNonce = myAEAD.GetNonce(); - myKey = myAEAD.Key; - } - else if (cipherParameters is ParametersWithIV) - { - ParametersWithIV myParms = (ParametersWithIV) cipherParameters; - myNonce = myParms.GetIV(); - myKey = (KeyParameter) myParms.Parameters; - } - else - { - throw new ArgumentException("invalid parameters passed to GCM_SIV"); - } - - /* Check nonceSize */ - if (myNonce == null || myNonce.Length != NONCELEN) - { - throw new ArgumentException("Invalid nonce"); - } - - /* Check keysize */ - if (myKey == null) - { - throw new ArgumentException("Invalid key"); - } - - byte[] k = myKey.GetKey(); - - if (k.Length != BUFLEN - && k.Length != (BUFLEN << 1)) - { - throw new ArgumentException("Invalid key"); - } - - /* Reset details */ - forEncryption = pEncrypt; - theInitialAEAD = myInitialAEAD; - theNonce = myNonce; - - /* Initialise the keys */ - deriveKeys(myKey); - resetStreams(); - } - - public string AlgorithmName - { - get { return theCipher.AlgorithmName + "-GCM-SIV"; } - } - - /** - * check AEAD status. - * @param pLen the aeadLength - */ - private void checkAEADStatus(int pLen) - { - /* Check we are initialised */ - if ((theFlags & INIT) == 0) - { - throw new InvalidOperationException("Cipher is not initialised"); - } - - /* Check AAD is allowed */ - if ((theFlags & AEAD_COMPLETE) != 0) - { - throw new InvalidOperationException("AEAD data cannot be processed after ordinary data"); - } - - /* Make sure that we haven't breached AEAD data limit */ - if ((long)theAEADHasher.getBytesProcessed() + Int64.MinValue - > (MAX_DATALEN - pLen) + Int64.MinValue) - { - throw new InvalidOperationException("AEAD byte count exceeded"); - } - } - - /** - * check status. - * @param pLen the dataLength - */ - private void checkStatus(int pLen) - { - /* Check we are initialised */ - if ((theFlags & INIT) == 0) - { - throw new InvalidOperationException("Cipher is not initialised"); - } - - /* Complete the AEAD section if this is the first data */ - if ((theFlags & AEAD_COMPLETE) == 0) - { - theAEADHasher.completeHash(); - theFlags |= AEAD_COMPLETE; - } - - /* Make sure that we haven't breached data limit */ - long dataLimit = MAX_DATALEN; - long currBytes = thePlain.Length; - if (!forEncryption) - { - dataLimit += BUFLEN; - currBytes = theEncData.Length; - } - if (currBytes + System.Int64.MinValue - > (dataLimit - pLen) + System.Int64.MinValue) - { - throw new InvalidOperationException("byte count exceeded"); - } - } - - public void ProcessAadByte(byte pByte) - { - /* Check that we can supply AEAD */ - checkAEADStatus(1); - - /* Process the aead */ - theAEADHasher.updateHash(pByte); - } - - public void ProcessAadBytes(byte[] pData, - int pOffset, - int pLen) - { - /* Check that we can supply AEAD */ - checkAEADStatus(pLen); - - /* Check input buffer */ - checkBuffer(pData, pOffset, pLen, false); - - /* Process the aead */ - theAEADHasher.updateHash(pData, pOffset, pLen); - } - - public int ProcessByte(byte pByte, - byte[] pOutput, - int pOutOffset) - { - /* Check that we have initialised */ - checkStatus(1); - - /* Store the data */ - if (forEncryption) - { - thePlain.WriteByte(pByte); - theDataHasher.updateHash(pByte); - } - else - { - theEncData.WriteByte(pByte); - } - - /* No data returned */ - return 0; - } - - public int ProcessBytes(byte[] pData, - int pOffset, - int pLen, - byte[] pOutput, - int pOutOffset) - { - /* Check that we have initialised */ - checkStatus(pLen); - - /* Check input buffer */ - checkBuffer(pData, pOffset, pLen, false); - - /* Store the data */ - if (forEncryption) - { - thePlain.Write(pData, pOffset, pLen); - theDataHasher.updateHash(pData, pOffset, pLen); - } - else - { - theEncData.Write(pData, pOffset, pLen); - } - - /* No data returned */ - return 0; - } - - public int DoFinal(byte[] pOutput, - int pOffset) - { - /* Check that we have initialised */ - checkStatus(0); - - /* Check output buffer */ - checkBuffer(pOutput, pOffset, GetOutputSize(0), true); - - /* If we are encrypting */ - if (forEncryption) - { - /* Derive the tag */ - byte[] myTag = calculateTag(); - - /* encrypt the plain text */ - int myDataLen = BUFLEN + encryptPlain(myTag, pOutput, pOffset); - - /* Add the tag to the output */ - Array.Copy(myTag, 0, pOutput, pOffset + thePlain.Length, BUFLEN); - - /* Reset the streams */ - resetStreams(); - return myDataLen; - - /* else we are decrypting */ - } - else - { - /* decrypt to plain text */ - decryptPlain(); - - /* Release plain text */ - int myDataLen = (int)thePlain.Length; - byte[] mySrc = thePlain.GetBuffer(); - Array.Copy(mySrc, 0, pOutput, pOffset, myDataLen); - - /* Reset the streams */ - resetStreams(); - return myDataLen; - } - } - - public byte[] GetMac() - { - throw new InvalidOperationException(); - } - - public int GetUpdateOutputSize(int pLen) - { - return 0; - } - - public int GetOutputSize(int pLen) - { - if (forEncryption) { - return (int)(pLen + thePlain.Length + BUFLEN); - } - int myCurr = (int)(pLen + theEncData.Length); - return myCurr > BUFLEN ? myCurr - BUFLEN : 0; - } - - public void Reset() - { - resetStreams(); - } - - /** - * Reset Streams. - */ - private void resetStreams() - { - /* Clear the plainText buffer */ - if (thePlain != null) - { - thePlain.Dispose(); - thePlain = new GCMSIVCache(); - } - - /* Reset hashers */ - theAEADHasher.reset(); - theDataHasher.reset(); - - /* Recreate streams (to release memory) */ - thePlain = new GCMSIVCache(); - theEncData = forEncryption ? null : new GCMSIVCache(); - - /* Initialise AEAD if required */ - theFlags &= ~AEAD_COMPLETE; - Arrays.Fill(theGHash, (byte) 0); - if (theInitialAEAD != null) - { - theAEADHasher.updateHash(theInitialAEAD, 0, theInitialAEAD.Length); - } - } - - /** - * Obtain buffer length (allowing for null). - * @param pBuffer the buffere - * @return the length - */ - private static int bufLength(byte[] pBuffer) - { - return pBuffer == null ? 0 : pBuffer.Length; - } - - /** - * Check buffer. - * @param pBuffer the buffer - * @param pOffset the offset - * @param pLen the length - * @param pOutput is this an output buffer? - */ - private static void checkBuffer(byte[] pBuffer, - int pOffset, - int pLen, - bool pOutput) - { - /* Access lengths */ - int myBufLen = bufLength(pBuffer); - int myLast = pOffset + pLen; - - /* Check for negative values and buffer overflow */ - bool badLen = pLen < 0 || pOffset < 0 || myLast < 0; - if (badLen || myLast > myBufLen) - { - throw pOutput - ? new OutputLengthException("Output buffer too short.") - : new DataLengthException("Input buffer too short."); - } - } - - /** - * encrypt data stream. - * @param pCounter the counter - * @param pTarget the target buffer - * @param pOffset the target offset - * @return the length of data encrypted - */ - private int encryptPlain(byte[] pCounter, - byte[] pTarget, - int pOffset) - { - /* Access buffer and length */ - byte[] mySrc = thePlain.GetBuffer(); - byte[] myCounter = Arrays.Clone(pCounter); - myCounter[BUFLEN - 1] |= MASK; - byte[] myMask = new byte[BUFLEN]; - long myRemaining = thePlain.Length; - int myOff = 0; - - /* While we have data to process */ - while (myRemaining > 0) - { - /* Generate the next mask */ - theCipher.ProcessBlock(myCounter, 0, myMask, 0); - - /* Xor data into mask */ - int myLen = (int)System.Math.Min(BUFLEN, myRemaining); - xorBlock(myMask, mySrc, myOff, myLen); - - /* Copy encrypted data to output */ - Array.Copy(myMask, 0, pTarget, pOffset + myOff, myLen); - - /* Adjust counters */ - myRemaining -= myLen; - myOff += myLen; - incrementCounter(myCounter); - } - - /* Return the amount of data processed */ - return (int)thePlain.Length; - } - - /** - * decrypt data stream. - * @throws InvalidCipherTextException on data too short or mac check failed - */ - private void decryptPlain() - { - /* Access buffer and length */ - byte[] mySrc = theEncData.GetBuffer(); - int myRemaining = (int)theEncData.Length - BUFLEN; - - /* Check for insufficient data */ - if (myRemaining < 0) - { - throw new InvalidCipherTextException("Data too short"); - } - - /* Access counter */ - byte[] myExpected = Arrays.CopyOfRange(mySrc, myRemaining, myRemaining + BUFLEN); - byte[] myCounter = Arrays.Clone(myExpected); - myCounter[BUFLEN - 1] |= MASK; - byte[] myMask = new byte[BUFLEN]; - int myOff = 0; - - /* While we have data to process */ - while (myRemaining > 0) - { - /* Generate the next mask */ - theCipher.ProcessBlock(myCounter, 0, myMask, 0); - - /* Xor data into mask */ - int myLen = System.Math.Min(BUFLEN, myRemaining); - xorBlock(myMask, mySrc, myOff, myLen); - - /* Write data to plain dataStream */ - thePlain.Write(myMask, 0, myLen); - theDataHasher.updateHash(myMask, 0, myLen); - - /* Adjust counters */ - myRemaining -= myLen; - myOff += myLen; - incrementCounter(myCounter); - } - - /* Derive and check the tag */ - byte[] myTag = calculateTag(); - if (!Arrays.ConstantTimeAreEqual(myTag, myExpected)) - { - Reset(); - throw new InvalidCipherTextException("mac check failed"); - } - } - - /** - * calculate tag. - * @return the calculated tag - */ - private byte[] calculateTag() - { - /* Complete the hash */ - theDataHasher.completeHash(); - byte[] myPolyVal = completePolyVal(); - - /* calculate polyVal */ - byte[] myResult = new byte[BUFLEN]; - - /* Fold in the nonce */ - for (int i = 0; i < NONCELEN; i++) - { - myPolyVal[i] ^= theNonce[i]; - } - - /* Clear top bit */ - myPolyVal[BUFLEN - 1] &= (byte)(MASK - 1); - - /* Calculate tag and return it */ - theCipher.ProcessBlock(myPolyVal, 0, myResult, 0); - return myResult; - } - - /** - * complete polyVAL. - * @return the calculated value - */ - private byte[] completePolyVal() - { - /* Build the polyVal result */ - byte[] myResult = new byte[BUFLEN]; - gHashLengths(); - fillReverse(theGHash, 0, BUFLEN, myResult); - return myResult; - } - - /** - * process lengths. - */ - private void gHashLengths() - { - /* Create reversed bigEndian buffer to keep it simple */ - byte[] myIn = new byte[BUFLEN]; - Pack.UInt64_To_BE((ulong)Bytes.SIZE * theDataHasher.getBytesProcessed(), myIn, 0); - Pack.UInt64_To_BE((ulong)Bytes.SIZE * theAEADHasher.getBytesProcessed(), myIn, (int)Longs.BYTES); - - /* hash value */ - gHASH(myIn); - } - - /** - * perform the next GHASH step. - * @param pNext the next value - */ - private void gHASH(byte[] pNext) - { - xorBlock(theGHash, pNext); - theMultiplier.MultiplyH(theGHash); - } - - /** - * Byte reverse a buffer. - * @param pInput the input buffer - * @param pOffset the offset - * @param pLength the length of data (<= BUFLEN) - * @param pOutput the output buffer - */ - private static void fillReverse(byte[] pInput, - int pOffset, - int pLength, - byte[] pOutput) - { - /* Loop through the buffer */ - for (int i = 0, j = BUFLEN - 1; i < pLength; i++, j--) - { - /* Copy byte */ - pOutput[j] = pInput[pOffset + i]; - } - } - - /** - * xor a full block buffer. - * @param pLeft the left operand and result - * @param pRight the right operand - */ - private static void xorBlock(byte[] pLeft, - byte[] pRight) - { - /* Loop through the bytes */ - for (int i = 0; i < BUFLEN; i++) - { - pLeft[i] ^= pRight[i]; - } - } - - /** - * xor a partial block buffer. - * @param pLeft the left operand and result - * @param pRight the right operand - * @param pOffset the offset in the right operand - * @param pLength the length of data in the right operand - */ - private static void xorBlock(byte[] pLeft, - byte[] pRight, - int pOffset, - int pLength) - { - /* Loop through the bytes */ - for (int i = 0; i < pLength; i++) - { - pLeft[i] ^= pRight[i + pOffset]; - } - } - - /** - * increment the counter. - * @param pCounter the counter to increment - */ - private static void incrementCounter(byte[] pCounter) - { - /* Loop through the bytes incrementing counter */ - for (int i = 0; i < Integers.BYTES; i++) - { - if (++pCounter[i] != 0) - { - break; - } - } - } - - /** - * multiply by X. - * @param pValue the value to adjust - */ - private static void mulX(byte[] pValue) - { - /* Loop through the bytes */ - byte myMask = (byte) 0; - for (int i = 0; i < BUFLEN; i++) - { - byte myValue = pValue[i]; - pValue[i] = (byte) (((myValue >> 1) & ~MASK) | myMask); - myMask = (byte)((myValue & 1) == 0 ? 0 : MASK); - } - - /* Xor in addition if last bit was set */ - if (myMask != 0) - { - pValue[0] ^= ADD; - } - } - - /** - * Derive Keys. - * @param pKey the keyGeneration key - */ - private void deriveKeys(KeyParameter pKey) - { - /* Create the buffers */ - byte[] myIn = new byte[BUFLEN]; - byte[] myOut = new byte[BUFLEN]; - byte[] myResult = new byte[BUFLEN]; - byte[] myEncKey = new byte[pKey.GetKey().Length]; - - /* Prepare for encryption */ - Array.Copy(theNonce, 0, myIn, BUFLEN - NONCELEN, NONCELEN); - theCipher.Init(true, pKey); - - /* Derive authentication key */ - int myOff = 0; - theCipher.ProcessBlock(myIn, 0, myOut, 0); - Array.Copy(myOut, 0, myResult, myOff, HALFBUFLEN); - myIn[0]++; - myOff += HALFBUFLEN; - theCipher.ProcessBlock(myIn, 0, myOut, 0); - Array.Copy(myOut, 0, myResult, myOff, HALFBUFLEN); - - /* Derive encryption key */ - myIn[0]++; - myOff = 0; - theCipher.ProcessBlock(myIn, 0, myOut, 0); - Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); - myIn[0]++; - myOff += HALFBUFLEN; - theCipher.ProcessBlock(myIn, 0, myOut, 0); - Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); - - /* If we have a 32byte key */ - if (myEncKey.Length == BUFLEN << 1) - { - /* Derive remainder of encryption key */ - myIn[0]++; - myOff += HALFBUFLEN; - theCipher.ProcessBlock(myIn, 0, myOut, 0); - Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); - myIn[0]++; - myOff += HALFBUFLEN; - theCipher.ProcessBlock(myIn, 0, myOut, 0); - Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); - } - - /* Initialise the Cipher */ - theCipher.Init(true, new KeyParameter(myEncKey)); - - /* Initialise the multiplier */ - fillReverse(myResult, 0, BUFLEN, myOut); - mulX(myOut); - theMultiplier.Init(myOut); - theFlags |= INIT; - } - - /** - * GCMSIVCache. - */ - class GCMSIVCache - : MemoryOutputStream - { - /** - * number of bytes hashed. - */ - private int numHashed; - - /** - * Constructor. - */ - internal GCMSIVCache() - { - } - } - - /** - * Hash Control. - */ - class GCMSIVHasher - { - /** - * Cache. - */ - private readonly byte[] theBuffer = new byte[BUFLEN]; - - /** - * Single byte cache. - */ - private readonly byte[] theByte = new byte[1]; - - /** - * Count of active bytes in cache. - */ - private int numActive; - - /** - * Count of hashed bytes. - */ - private ulong numHashed; - - private readonly GcmSivBlockCipher parent; - - internal GCMSIVHasher(GcmSivBlockCipher parent) - { - this.parent = parent; - } - - /** - * Obtain the count of bytes hashed. - * @return the count - */ - internal ulong getBytesProcessed() - { - return numHashed; - } - - /** - * Reset the hasher. - */ - internal void reset() - { - numActive = 0; - numHashed = 0; - } - - /** - * update hash. - * @param pByte the byte - */ - internal void updateHash(byte pByte) - { - theByte[0] = pByte; - updateHash(theByte, 0, 1); - } - - /** - * update hash. - * @param pBuffer the buffer - * @param pOffset the offset within the buffer - * @param pLen the length of data - */ - internal void updateHash(byte[] pBuffer, - int pOffset, - int pLen) - { - /* If we should process the cache */ - int mySpace = BUFLEN - numActive; - int numProcessed = 0; - int myRemaining = pLen; - if (numActive > 0 - && pLen >= mySpace) - { - /* Copy data into the cache and hash it */ - Array.Copy(pBuffer, pOffset, theBuffer, numActive, mySpace); - fillReverse(theBuffer, 0, BUFLEN, parent.theReverse); - parent.gHASH(parent.theReverse); - - /* Adjust counters */ - numProcessed += mySpace; - myRemaining -= mySpace; - numActive = 0; - } - - /* While we have full blocks */ - while (myRemaining >= BUFLEN) - { - /* Access the next data */ - fillReverse(pBuffer, pOffset + numProcessed, BUFLEN, parent.theReverse); - parent.gHASH(parent.theReverse); - - /* Adjust counters */ - numProcessed += mySpace; - myRemaining -= mySpace; - } - - /* If we have remaining data */ - if (myRemaining > 0) - { - /* Copy data into the cache */ - Array.Copy(pBuffer, pOffset + numProcessed, theBuffer, numActive, myRemaining); - numActive += myRemaining; - } - - /* Adjust the number of bytes processed */ - numHashed += (ulong)pLen; - } - - /** - * complete hash. - */ - internal void completeHash() - { - /* If we have remaining data */ - if (numActive > 0) - { - /* Access the next data */ - Arrays.Fill(parent.theReverse, (byte) 0); - fillReverse(theBuffer, 0, numActive, parent.theReverse); - - /* hash value */ - parent.gHASH(parent.theReverse); - } - } - } - } + public virtual void Init(bool pEncrypt, ICipherParameters cipherParameters) + { + /* Set defaults */ + byte[] myInitialAEAD = null; + byte[] myNonce = null; + KeyParameter myKey = null; + + /* Access parameters */ + if (cipherParameters is AeadParameters) + { + AeadParameters myAEAD = (AeadParameters)cipherParameters; + myInitialAEAD = myAEAD.GetAssociatedText(); + myNonce = myAEAD.GetNonce(); + myKey = myAEAD.Key; + } + else if (cipherParameters is ParametersWithIV) + { + ParametersWithIV myParms = (ParametersWithIV)cipherParameters; + myNonce = myParms.GetIV(); + myKey = (KeyParameter)myParms.Parameters; + } + else + { + throw new ArgumentException("invalid parameters passed to GCM_SIV"); + } + + /* Check nonceSize */ + if (myNonce == null || myNonce.Length != NONCELEN) + { + throw new ArgumentException("Invalid nonce"); + } + + /* Check keysize */ + if (myKey == null) + { + throw new ArgumentException("Invalid key"); + } + + byte[] k = myKey.GetKey(); + + if (k.Length != BUFLEN + && k.Length != (BUFLEN << 1)) + { + throw new ArgumentException("Invalid key"); + } + + /* Reset details */ + forEncryption = pEncrypt; + theInitialAEAD = myInitialAEAD; + theNonce = myNonce; + + /* Initialise the keys */ + deriveKeys(myKey); + ResetStreams(); + } + + public virtual string AlgorithmName + { + get { return theCipher.AlgorithmName + "-GCM-SIV"; } + } + + /** + * check AEAD status. + * @param pLen the aeadLength + */ + private void CheckAeadStatus(int pLen) + { + /* Check we are initialised */ + if ((theFlags & INIT) == 0) + { + throw new InvalidOperationException("Cipher is not initialised"); + } + + /* Check AAD is allowed */ + if ((theFlags & AEAD_COMPLETE) != 0) + { + throw new InvalidOperationException("AEAD data cannot be processed after ordinary data"); + } + + /* Make sure that we haven't breached AEAD data limit */ + if ((long)theAEADHasher.getBytesProcessed() + Int64.MinValue > (MAX_DATALEN - pLen) + Int64.MinValue) + { + throw new InvalidOperationException("AEAD byte count exceeded"); + } + } + + /** + * check status. + * @param pLen the dataLength + */ + private void CheckStatus(int pLen) + { + /* Check we are initialised */ + if ((theFlags & INIT) == 0) + { + throw new InvalidOperationException("Cipher is not initialised"); + } + + /* Complete the AEAD section if this is the first data */ + if ((theFlags & AEAD_COMPLETE) == 0) + { + theAEADHasher.completeHash(); + theFlags |= AEAD_COMPLETE; + } + + /* Make sure that we haven't breached data limit */ + long dataLimit = MAX_DATALEN; + long currBytes = thePlain.Length; + if (!forEncryption) + { + dataLimit += BUFLEN; + currBytes = theEncData.Length; + } + if (currBytes + System.Int64.MinValue + > (dataLimit - pLen) + System.Int64.MinValue) + { + throw new InvalidOperationException("byte count exceeded"); + } + } + + public virtual void ProcessAadByte(byte pByte) + { + /* Check that we can supply AEAD */ + CheckAeadStatus(1); + + /* Process the aead */ + theAEADHasher.updateHash(pByte); + } + + public virtual void ProcessAadBytes(byte[] pData, int pOffset, int pLen) + { + /* Check that we can supply AEAD */ + CheckAeadStatus(pLen); + + /* Check input buffer */ + CheckBuffer(pData, pOffset, pLen, false); + + /* Process the aead */ + theAEADHasher.updateHash(pData, pOffset, pLen); + } + + public virtual int ProcessByte(byte pByte, byte[] pOutput, int pOutOffset) + { + /* Check that we have initialised */ + CheckStatus(1); + + /* Store the data */ + if (forEncryption) + { + thePlain.WriteByte(pByte); + theDataHasher.updateHash(pByte); + } + else + { + theEncData.WriteByte(pByte); + } + + /* No data returned */ + return 0; + } + + public virtual int ProcessBytes(byte[] pData, int pOffset, int pLen, byte[] pOutput, int pOutOffset) + { + /* Check that we have initialised */ + CheckStatus(pLen); + + /* Check input buffer */ + CheckBuffer(pData, pOffset, pLen, false); + + /* Store the data */ + if (forEncryption) + { + thePlain.Write(pData, pOffset, pLen); + theDataHasher.updateHash(pData, pOffset, pLen); + } + else + { + theEncData.Write(pData, pOffset, pLen); + } + + /* No data returned */ + return 0; + } + + public virtual int DoFinal(byte[] pOutput, int pOffset) + { + /* Check that we have initialised */ + CheckStatus(0); + + /* Check output buffer */ + CheckBuffer(pOutput, pOffset, GetOutputSize(0), true); + + /* If we are encrypting */ + if (forEncryption) + { + /* Derive the tag */ + byte[] myTag = calculateTag(); + + /* encrypt the plain text */ + int myDataLen = BUFLEN + encryptPlain(myTag, pOutput, pOffset); + + /* Add the tag to the output */ + Array.Copy(myTag, 0, pOutput, pOffset + thePlain.Length, BUFLEN); + + /* Reset the streams */ + ResetStreams(); + return myDataLen; + + /* else we are decrypting */ + } + else + { + /* decrypt to plain text */ + decryptPlain(); + + /* Release plain text */ + int myDataLen = Streams.WriteBufTo(thePlain, pOutput, pOffset); + + /* Reset the streams */ + ResetStreams(); + return myDataLen; + } + } + + public virtual byte[] GetMac() + { + throw new InvalidOperationException(); + } + + public virtual int GetUpdateOutputSize(int pLen) + { + return 0; + } + + public virtual int GetOutputSize(int pLen) + { + if (forEncryption) + { + return (int)(pLen + thePlain.Length + BUFLEN); + } + int myCurr = (int)(pLen + theEncData.Length); + return myCurr > BUFLEN ? myCurr - BUFLEN : 0; + } + + public virtual void Reset() + { + ResetStreams(); + } + + /** + * Reset Streams. + */ + private void ResetStreams() + { + /* Clear the plainText buffer */ + if (thePlain != null) + { + thePlain.Position = 0L; + Streams.WriteZeroes(thePlain, thePlain.Capacity); + } + + /* Reset hashers */ + theAEADHasher.Reset(); + theDataHasher.Reset(); + + /* Recreate streams (to release memory) */ + thePlain = new GcmSivCache(); + theEncData = forEncryption ? null : new GcmSivCache(); + + /* Initialise AEAD if required */ + theFlags &= ~AEAD_COMPLETE; + Arrays.Fill(theGHash, (byte)0); + if (theInitialAEAD != null) + { + theAEADHasher.updateHash(theInitialAEAD, 0, theInitialAEAD.Length); + } + } + + /** + * Obtain buffer length (allowing for null). + * @param pBuffer the buffere + * @return the length + */ + private static int bufLength(byte[] pBuffer) + { + return pBuffer == null ? 0 : pBuffer.Length; + } + + /** + * Check buffer. + * @param pBuffer the buffer + * @param pOffset the offset + * @param pLen the length + * @param pOutput is this an output buffer? + */ + private static void CheckBuffer(byte[] pBuffer, int pOffset, int pLen, bool pOutput) + { + /* Access lengths */ + int myBufLen = bufLength(pBuffer); + int myLast = pOffset + pLen; + + /* Check for negative values and buffer overflow */ + bool badLen = pLen < 0 || pOffset < 0 || myLast < 0; + if (badLen || myLast > myBufLen) + { + throw pOutput + ? new OutputLengthException("Output buffer too short.") + : new DataLengthException("Input buffer too short."); + } + } + + /** + * encrypt data stream. + * @param pCounter the counter + * @param pTarget the target buffer + * @param pOffset the target offset + * @return the length of data encrypted + */ + private int encryptPlain(byte[] pCounter, byte[] pTarget, int pOffset) + { + /* Access buffer and length */ +#if PORTABLE + byte[] thePlainBuf = thePlain.ToArray(); + int thePlainLen = thePlainBuf.Length; +#else + byte[] thePlainBuf = thePlain.GetBuffer(); + int thePlainLen = (int)thePlain.Length; +#endif + + byte[] mySrc = thePlainBuf; + byte[] myCounter = Arrays.Clone(pCounter); + myCounter[BUFLEN - 1] |= MASK; + byte[] myMask = new byte[BUFLEN]; + long myRemaining = thePlainLen; + int myOff = 0; + + /* While we have data to process */ + while (myRemaining > 0) + { + /* Generate the next mask */ + theCipher.ProcessBlock(myCounter, 0, myMask, 0); + + /* Xor data into mask */ + int myLen = (int)System.Math.Min(BUFLEN, myRemaining); + xorBlock(myMask, mySrc, myOff, myLen); + + /* Copy encrypted data to output */ + Array.Copy(myMask, 0, pTarget, pOffset + myOff, myLen); + + /* Adjust counters */ + myRemaining -= myLen; + myOff += myLen; + incrementCounter(myCounter); + } + + /* Return the amount of data processed */ + return thePlainLen; + } + + /** + * decrypt data stream. + * @throws InvalidCipherTextException on data too short or mac check failed + */ + private void decryptPlain() + { + /* Access buffer and length */ +#if PORTABLE + byte[] theEncDataBuf = theEncData.ToArray(); + int theEncDataLen = theEncDataBuf.Length; +#else + byte[] theEncDataBuf = theEncData.GetBuffer(); + int theEncDataLen = (int)theEncData.Length; +#endif + + byte[] mySrc = theEncDataBuf; + int myRemaining = theEncDataLen - BUFLEN; + + /* Check for insufficient data */ + if (myRemaining < 0) + { + throw new InvalidCipherTextException("Data too short"); + } + + /* Access counter */ + byte[] myExpected = Arrays.CopyOfRange(mySrc, myRemaining, myRemaining + BUFLEN); + byte[] myCounter = Arrays.Clone(myExpected); + myCounter[BUFLEN - 1] |= MASK; + byte[] myMask = new byte[BUFLEN]; + int myOff = 0; + + /* While we have data to process */ + while (myRemaining > 0) + { + /* Generate the next mask */ + theCipher.ProcessBlock(myCounter, 0, myMask, 0); + + /* Xor data into mask */ + int myLen = System.Math.Min(BUFLEN, myRemaining); + xorBlock(myMask, mySrc, myOff, myLen); + + /* Write data to plain dataStream */ + thePlain.Write(myMask, 0, myLen); + theDataHasher.updateHash(myMask, 0, myLen); + + /* Adjust counters */ + myRemaining -= myLen; + myOff += myLen; + incrementCounter(myCounter); + } + + /* Derive and check the tag */ + byte[] myTag = calculateTag(); + if (!Arrays.ConstantTimeAreEqual(myTag, myExpected)) + { + Reset(); + throw new InvalidCipherTextException("mac check failed"); + } + } + + /** + * calculate tag. + * @return the calculated tag + */ + private byte[] calculateTag() + { + /* Complete the hash */ + theDataHasher.completeHash(); + byte[] myPolyVal = completePolyVal(); + + /* calculate polyVal */ + byte[] myResult = new byte[BUFLEN]; + + /* Fold in the nonce */ + for (int i = 0; i < NONCELEN; i++) + { + myPolyVal[i] ^= theNonce[i]; + } + + /* Clear top bit */ + myPolyVal[BUFLEN - 1] &= (byte)(MASK - 1); + + /* Calculate tag and return it */ + theCipher.ProcessBlock(myPolyVal, 0, myResult, 0); + return myResult; + } + + /** + * complete polyVAL. + * @return the calculated value + */ + private byte[] completePolyVal() + { + /* Build the polyVal result */ + byte[] myResult = new byte[BUFLEN]; + gHashLengths(); + fillReverse(theGHash, 0, BUFLEN, myResult); + return myResult; + } + + /** + * process lengths. + */ + private void gHashLengths() + { + /* Create reversed bigEndian buffer to keep it simple */ + byte[] myIn = new byte[BUFLEN]; + Pack.UInt64_To_BE((ulong)Bytes.NumBits * theDataHasher.getBytesProcessed(), myIn, 0); + Pack.UInt64_To_BE((ulong)Bytes.NumBits * theAEADHasher.getBytesProcessed(), myIn, Longs.NumBytes); + + /* hash value */ + gHASH(myIn); + } + + /** + * perform the next GHASH step. + * @param pNext the next value + */ + private void gHASH(byte[] pNext) + { + xorBlock(theGHash, pNext); + theMultiplier.MultiplyH(theGHash); + } + + /** + * Byte reverse a buffer. + * @param pInput the input buffer + * @param pOffset the offset + * @param pLength the length of data (<= BUFLEN) + * @param pOutput the output buffer + */ + private static void fillReverse(byte[] pInput, int pOffset, int pLength, byte[] pOutput) + { + /* Loop through the buffer */ + for (int i = 0, j = BUFLEN - 1; i < pLength; i++, j--) + { + /* Copy byte */ + pOutput[j] = pInput[pOffset + i]; + } + } + + /** + * xor a full block buffer. + * @param pLeft the left operand and result + * @param pRight the right operand + */ + private static void xorBlock(byte[] pLeft, byte[] pRight) + { + /* Loop through the bytes */ + for (int i = 0; i < BUFLEN; i++) + { + pLeft[i] ^= pRight[i]; + } + } + + /** + * xor a partial block buffer. + * @param pLeft the left operand and result + * @param pRight the right operand + * @param pOffset the offset in the right operand + * @param pLength the length of data in the right operand + */ + private static void xorBlock(byte[] pLeft, byte[] pRight, int pOffset, int pLength) + { + /* Loop through the bytes */ + for (int i = 0; i < pLength; i++) + { + pLeft[i] ^= pRight[i + pOffset]; + } + } + + /** + * increment the counter. + * @param pCounter the counter to increment + */ + private static void incrementCounter(byte[] pCounter) + { + /* Loop through the bytes incrementing counter */ + for (int i = 0; i < Integers.NumBytes; i++) + { + if (++pCounter[i] != 0) + { + break; + } + } + } + + /** + * multiply by X. + * @param pValue the value to adjust + */ + private static void mulX(byte[] pValue) + { + /* Loop through the bytes */ + byte myMask = (byte)0; + for (int i = 0; i < BUFLEN; i++) + { + byte myValue = pValue[i]; + pValue[i] = (byte)(((myValue >> 1) & ~MASK) | myMask); + myMask = (byte)((myValue & 1) == 0 ? 0 : MASK); + } + + /* Xor in addition if last bit was set */ + if (myMask != 0) + { + pValue[0] ^= ADD; + } + } + + /** + * Derive Keys. + * @param pKey the keyGeneration key + */ + private void deriveKeys(KeyParameter pKey) + { + /* Create the buffers */ + byte[] myIn = new byte[BUFLEN]; + byte[] myOut = new byte[BUFLEN]; + byte[] myResult = new byte[BUFLEN]; + byte[] myEncKey = new byte[pKey.GetKey().Length]; + + /* Prepare for encryption */ + Array.Copy(theNonce, 0, myIn, BUFLEN - NONCELEN, NONCELEN); + theCipher.Init(true, pKey); + + /* Derive authentication key */ + int myOff = 0; + theCipher.ProcessBlock(myIn, 0, myOut, 0); + Array.Copy(myOut, 0, myResult, myOff, HALFBUFLEN); + myIn[0]++; + myOff += HALFBUFLEN; + theCipher.ProcessBlock(myIn, 0, myOut, 0); + Array.Copy(myOut, 0, myResult, myOff, HALFBUFLEN); + + /* Derive encryption key */ + myIn[0]++; + myOff = 0; + theCipher.ProcessBlock(myIn, 0, myOut, 0); + Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); + myIn[0]++; + myOff += HALFBUFLEN; + theCipher.ProcessBlock(myIn, 0, myOut, 0); + Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); + + /* If we have a 32byte key */ + if (myEncKey.Length == BUFLEN << 1) + { + /* Derive remainder of encryption key */ + myIn[0]++; + myOff += HALFBUFLEN; + theCipher.ProcessBlock(myIn, 0, myOut, 0); + Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); + myIn[0]++; + myOff += HALFBUFLEN; + theCipher.ProcessBlock(myIn, 0, myOut, 0); + Array.Copy(myOut, 0, myEncKey, myOff, HALFBUFLEN); + } + + /* Initialise the Cipher */ + theCipher.Init(true, new KeyParameter(myEncKey)); + + /* Initialise the multiplier */ + fillReverse(myResult, 0, BUFLEN, myOut); + mulX(myOut); + theMultiplier.Init(myOut); + theFlags |= INIT; + } + + private class GcmSivCache + : MemoryStream + { + internal GcmSivCache() + { + } + } + + /** + * Hash Control. + */ + private class GcmSivHasher + { + /** + * Cache. + */ + private readonly byte[] theBuffer = new byte[BUFLEN]; + + /** + * Single byte cache. + */ + private readonly byte[] theByte = new byte[1]; + + /** + * Count of active bytes in cache. + */ + private int numActive; + + /** + * Count of hashed bytes. + */ + private ulong numHashed; + + private readonly GcmSivBlockCipher parent; + + internal GcmSivHasher(GcmSivBlockCipher parent) + { + this.parent = parent; + } + + /** + * Obtain the count of bytes hashed. + * @return the count + */ + internal ulong getBytesProcessed() + { + return numHashed; + } + + /** + * Reset the hasher. + */ + internal void Reset() + { + numActive = 0; + numHashed = 0; + } + + /** + * update hash. + * @param pByte the byte + */ + internal void updateHash(byte pByte) + { + theByte[0] = pByte; + updateHash(theByte, 0, 1); + } + + /** + * update hash. + * @param pBuffer the buffer + * @param pOffset the offset within the buffer + * @param pLen the length of data + */ + internal void updateHash(byte[] pBuffer, int pOffset, int pLen) + { + /* If we should process the cache */ + int mySpace = BUFLEN - numActive; + int numProcessed = 0; + int myRemaining = pLen; + if (numActive > 0 && pLen >= mySpace) + { + /* Copy data into the cache and hash it */ + Array.Copy(pBuffer, pOffset, theBuffer, numActive, mySpace); + fillReverse(theBuffer, 0, BUFLEN, parent.theReverse); + parent.gHASH(parent.theReverse); + + /* Adjust counters */ + numProcessed += mySpace; + myRemaining -= mySpace; + numActive = 0; + } + + /* While we have full blocks */ + while (myRemaining >= BUFLEN) + { + /* Access the next data */ + fillReverse(pBuffer, pOffset + numProcessed, BUFLEN, parent.theReverse); + parent.gHASH(parent.theReverse); + + /* Adjust counters */ + numProcessed += mySpace; + myRemaining -= mySpace; + } + + /* If we have remaining data */ + if (myRemaining > 0) + { + /* Copy data into the cache */ + Array.Copy(pBuffer, pOffset + numProcessed, theBuffer, numActive, myRemaining); + numActive += myRemaining; + } + + /* Adjust the number of bytes processed */ + numHashed += (ulong)pLen; + } + + /** + * complete hash. + */ + internal void completeHash() + { + /* If we have remaining data */ + if (numActive > 0) + { + /* Access the next data */ + Arrays.Fill(parent.theReverse, (byte)0); + fillReverse(theBuffer, 0, numActive, parent.theReverse); + + /* hash value */ + parent.gHASH(parent.theReverse); + } + } + } + } } diff --git a/crypto/src/crypto/util/BasicAlphabetMapper.cs b/crypto/src/crypto/util/BasicAlphabetMapper.cs index ac4011a94..b60733fc0 100644 --- a/crypto/src/crypto/util/BasicAlphabetMapper.cs +++ b/crypto/src/crypto/util/BasicAlphabetMapper.cs @@ -1,104 +1,106 @@ using System; using System.Collections; +using Org.BouncyCastle.Utilities; + namespace Org.BouncyCastle.Crypto.Utilities { -/** - * A basic alphabet mapper that just creates a mapper based on the - * passed in array of characters. - */ - public class BasicAlphabetMapper - : IAlphabetMapper -{ - private Hashtable indexMap = new Hashtable(); - private Hashtable charMap = new Hashtable(); - /** - * Base constructor. - * - * @param alphabet a string of characters making up the alphabet. - */ - public BasicAlphabetMapper(string alphabet) : - this(alphabet.ToCharArray()) - { - } - - /** - * Base constructor. - * - * @param alphabet an array of characters making up the alphabet. + * A basic alphabet mapper that just creates a mapper based on the + * passed in array of characters. */ - public BasicAlphabetMapper(char[] alphabet) + public class BasicAlphabetMapper + : IAlphabetMapper { - for (int i = 0; i != alphabet.Length; i++) + private readonly IDictionary indexMap = Platform.CreateHashtable(); + private readonly IDictionary charMap = Platform.CreateHashtable(); + + /** + * Base constructor. + * + * @param alphabet a string of characters making up the alphabet. + */ + public BasicAlphabetMapper(string alphabet) : + this(alphabet.ToCharArray()) { - if (indexMap.ContainsKey(alphabet[i])) - { - throw new ArgumentException("duplicate key detected in alphabet: " + alphabet[i]); - } - indexMap.Add(alphabet[i], i); - charMap.Add(i, alphabet[i]); } - } - - public int Radix - { - get { return indexMap.Count; } - } - - public byte[] ConvertToIndexes(char[] input) - { - byte[] outBuf; - if (indexMap.Count <= 256) + /** + * Base constructor. + * + * @param alphabet an array of characters making up the alphabet. + */ + public BasicAlphabetMapper(char[] alphabet) { - outBuf = new byte[input.Length]; - for (int i = 0; i != input.Length; i++) + for (int i = 0; i != alphabet.Length; i++) { - outBuf[i] = (byte)(int)indexMap[input[i]]; + if (indexMap.Contains(alphabet[i])) + { + throw new ArgumentException("duplicate key detected in alphabet: " + alphabet[i]); + } + indexMap.Add(alphabet[i], i); + charMap.Add(i, alphabet[i]); } } - else + + public int Radix { - outBuf = new byte[input.Length * 2]; - for (int i = 0; i != input.Length; i++) - { - int idx = (int)indexMap[input[i]]; - outBuf[i * 2] = (byte)((idx >> 8) & 0xff); - outBuf[i * 2 + 1] = (byte)(idx & 0xff); - } + get { return indexMap.Count; } } - return outBuf; - } - - public char[] ConvertToChars(byte[] input) - { - char[] outBuf; - - if (charMap.Count <= 256) + public byte[] ConvertToIndexes(char[] input) { - outBuf = new char[input.Length]; - for (int i = 0; i != input.Length; i++) + byte[] outBuf; + + if (indexMap.Count <= 256) + { + outBuf = new byte[input.Length]; + for (int i = 0; i != input.Length; i++) + { + outBuf[i] = (byte)(int)indexMap[input[i]]; + } + } + else { - outBuf[i] = (char)charMap[input[i] & 0xff]; + outBuf = new byte[input.Length * 2]; + for (int i = 0; i != input.Length; i++) + { + int idx = (int)indexMap[input[i]]; + outBuf[i * 2] = (byte)((idx >> 8) & 0xff); + outBuf[i * 2 + 1] = (byte)(idx & 0xff); + } } + + return outBuf; } - else + + public char[] ConvertToChars(byte[] input) { - if ((input.Length & 0x1) != 0) + char[] outBuf; + + if (charMap.Count <= 256) { - throw new ArgumentException("two byte radix and input string odd.Length"); + outBuf = new char[input.Length]; + for (int i = 0; i != input.Length; i++) + { + outBuf[i] = (char)charMap[input[i] & 0xff]; + } } - - outBuf = new char[input.Length / 2]; - for (int i = 0; i != input.Length; i += 2) + else { - outBuf[i / 2] = (char)charMap[((input[i] << 8) & 0xff00) | (input[i + 1] & 0xff)]; + if ((input.Length & 0x1) != 0) + { + throw new ArgumentException("two byte radix and input string odd.Length"); + } + + outBuf = new char[input.Length / 2]; + for (int i = 0; i != input.Length; i += 2) + { + outBuf[i / 2] = (char)charMap[((input[i] << 8) & 0xff00) | (input[i + 1] & 0xff)]; + } } - } - return outBuf; + return outBuf; + } } } -} diff --git a/crypto/src/crypto/util/Pack.cs b/crypto/src/crypto/util/Pack.cs index 30b4ec8ae..8ba738d4f 100644 --- a/crypto/src/crypto/util/Pack.cs +++ b/crypto/src/crypto/util/Pack.cs @@ -20,11 +20,41 @@ namespace Org.BouncyCastle.Crypto.Utilities bs[off + 1] = (byte)(n); } - internal static ushort BE_To_UInt16(byte[] bs) + internal static void UInt16_To_BE(ushort[] ns, byte[] bs, int off) { - uint n = (uint)bs[0] << 8 - | (uint)bs[1]; - return (ushort)n; + for (int i = 0; i < ns.Length; ++i) + { + UInt16_To_BE(ns[i], bs, off); + off += 2; + } + } + + internal static void UInt16_To_BE(ushort[] ns, int nsOff, int nsLen, byte[] bs, int bsOff) + { + for (int i = 0; i < nsLen; ++i) + { + UInt16_To_BE(ns[nsOff + i], bs, bsOff); + bsOff += 2; + } + } + + internal static byte[] UInt16_To_BE(ushort n) + { + byte[] bs = new byte[2]; + UInt16_To_BE(n, bs, 0); + return bs; + } + + internal static byte[] UInt16_To_BE(ushort[] ns) + { + return UInt16_To_BE(ns, 0, ns.Length); + } + + internal static byte[] UInt16_To_BE(ushort[] ns, int nsOff, int nsLen) + { + byte[] bs = new byte[2 * nsLen]; + UInt16_To_BE(ns, nsOff, nsLen, bs, 0); + return bs; } internal static ushort BE_To_UInt16(byte[] bs, int off) @@ -34,11 +64,27 @@ namespace Org.BouncyCastle.Crypto.Utilities return (ushort)n; } - internal static byte[] UInt32_To_BE(uint n) + internal static void BE_To_UInt16(byte[] bs, int bsOff, ushort[] ns, int nsOff) { - byte[] bs = new byte[4]; - UInt32_To_BE(n, bs, 0); - return bs; + ns[nsOff] = BE_To_UInt16(bs, bsOff); + } + + internal static ushort[] BE_To_UInt16(byte[] bs) + { + return BE_To_UInt16(bs, 0, bs.Length); + } + + internal static ushort[] BE_To_UInt16(byte[] bs, int off, int len) + { + if ((len & 1) != 0) + throw new ArgumentException("must be a multiple of 2", "len"); + + ushort[] ns = new ushort[len / 2]; + for (int i = 0; i < len; i += 2) + { + BE_To_UInt16(bs, off + i, ns, i >> 1); + } + return ns; } internal static void UInt32_To_BE(uint n, byte[] bs) @@ -57,13 +103,6 @@ namespace Org.BouncyCastle.Crypto.Utilities bs[off + 3] = (byte)(n); } - internal static byte[] UInt32_To_BE(uint[] ns) - { - byte[] bs = new byte[4 * ns.Length]; - UInt32_To_BE(ns, bs, 0); - return bs; - } - internal static void UInt32_To_BE(uint[] ns, byte[] bs, int off) { for (int i = 0; i < ns.Length; ++i) @@ -73,7 +112,7 @@ namespace Org.BouncyCastle.Crypto.Utilities } } - public static void UInt32_To_BE(uint[] ns, int nsOff, int nsLen, byte[] bs, int bsOff) + internal static void UInt32_To_BE(uint[] ns, int nsOff, int nsLen, byte[] bs, int bsOff) { for (int i = 0; i < nsLen; ++i) { @@ -82,6 +121,20 @@ namespace Org.BouncyCastle.Crypto.Utilities } } + internal static byte[] UInt32_To_BE(uint n) + { + byte[] bs = new byte[4]; + UInt32_To_BE(n, bs, 0); + return bs; + } + + internal static byte[] UInt32_To_BE(uint[] ns) + { + byte[] bs = new byte[4 * ns.Length]; + UInt32_To_BE(ns, bs, 0); + return bs; + } + internal static uint BE_To_UInt32(byte[] bs) { return (uint)bs[0] << 24 @@ -107,7 +160,7 @@ namespace Org.BouncyCastle.Crypto.Utilities } } - public static void BE_To_UInt32(byte[] bs, int bsOff, uint[] ns, int nsOff, int nsLen) + internal static void BE_To_UInt32(byte[] bs, int bsOff, uint[] ns, int nsOff, int nsLen) { for (int i = 0; i < nsLen; ++i) { @@ -151,7 +204,7 @@ namespace Org.BouncyCastle.Crypto.Utilities } } - public static void UInt64_To_BE(ulong[] ns, int nsOff, int nsLen, byte[] bs, int bsOff) + internal static void UInt64_To_BE(ulong[] ns, int nsOff, int nsLen, byte[] bs, int bsOff) { for (int i = 0; i < nsLen; ++i) { @@ -160,13 +213,6 @@ namespace Org.BouncyCastle.Crypto.Utilities } } - internal static ulong BE_To_UInt64(byte[] bs) - { - uint hi = BE_To_UInt32(bs); - uint lo = BE_To_UInt32(bs, 4); - return ((ulong)hi << 32) | (ulong)lo; - } - internal static ulong BE_To_UInt64(byte[] bs, int off) { uint hi = BE_To_UInt32(bs, off); @@ -183,7 +229,7 @@ namespace Org.BouncyCastle.Crypto.Utilities } } - public static void BE_To_UInt64(byte[] bs, int bsOff, ulong[] ns, int nsOff, int nsLen) + internal static void BE_To_UInt64(byte[] bs, int bsOff, ulong[] ns, int nsOff, int nsLen) { for (int i = 0; i < nsLen; ++i) { diff --git a/crypto/src/security/SecureRandom.cs b/crypto/src/security/SecureRandom.cs index 8c6b74d5b..982fbf3a0 100644 --- a/crypto/src/security/SecureRandom.cs +++ b/crypto/src/security/SecureRandom.cs @@ -246,14 +246,14 @@ namespace Org.BouncyCastle.Security { byte[] bytes = new byte[4]; NextBytes(bytes); - return (int)Pack.BE_To_UInt32(bytes); + return (int)Pack.BE_To_UInt32(bytes, 0); } public virtual long NextLong() { byte[] bytes = new byte[8]; NextBytes(bytes); - return (long)Pack.BE_To_UInt64(bytes); + return (long)Pack.BE_To_UInt64(bytes, 0); } } } diff --git a/crypto/src/util/Arrays.cs b/crypto/src/util/Arrays.cs index 78c4e8ffc..fdf08a90c 100644 --- a/crypto/src/util/Arrays.cs +++ b/crypto/src/util/Arrays.cs @@ -705,6 +705,7 @@ namespace Org.BouncyCastle.Utilities return rv; } + [CLSCompliantAttribute(false)] public static ushort[] Concatenate(ushort[] a, ushort[] b) { if (a == null) diff --git a/crypto/src/util/Bytes.cs b/crypto/src/util/Bytes.cs index 0d73d67ae..ecde85dde 100644 --- a/crypto/src/util/Bytes.cs +++ b/crypto/src/util/Bytes.cs @@ -4,7 +4,7 @@ namespace Org.BouncyCastle.Utilities { public abstract class Bytes { - public static readonly uint BYTES = 1; - public static readonly uint SIZE = 8; + public const int NumBits = 8; + public const int NumBytes = 1; } } diff --git a/crypto/src/util/Integers.cs b/crypto/src/util/Integers.cs index b7bd25ce6..11045d9e3 100644 --- a/crypto/src/util/Integers.cs +++ b/crypto/src/util/Integers.cs @@ -6,8 +6,8 @@ namespace Org.BouncyCastle.Utilities { public abstract class Integers { - public static readonly uint BYTES = 4; - public static readonly uint SIZE = 32; + public const int NumBits = 32; + public const int NumBytes = 4; private static readonly byte[] DeBruijnTZ = { 0x00, 0x01, 0x02, 0x18, 0x03, 0x13, 0x06, 0x19, 0x16, 0x04, 0x14, 0x0A, diff --git a/crypto/src/util/Longs.cs b/crypto/src/util/Longs.cs index 892e57137..91dee2b50 100644 --- a/crypto/src/util/Longs.cs +++ b/crypto/src/util/Longs.cs @@ -6,8 +6,8 @@ namespace Org.BouncyCastle.Utilities { public abstract class Longs { - public static readonly uint BYTES = 8; - public static readonly uint SIZE = 64; + public const int NumBits = 64; + public const int NumBytes = 8; public static long Reverse(long i) { diff --git a/crypto/src/util/io/Streams.cs b/crypto/src/util/io/Streams.cs index 503a1b4f1..506b2489f 100644 --- a/crypto/src/util/io/Streams.cs +++ b/crypto/src/util/io/Streams.cs @@ -100,15 +100,9 @@ namespace Org.BouncyCastle.Utilities.IO /// <exception cref="IOException"></exception> public static int WriteBufTo(MemoryStream buf, byte[] output, int offset) { -#if PORTABLE - byte[] bytes = buf.ToArray(); - bytes.CopyTo(output, offset); - return bytes.Length; -#else int size = (int)buf.Length; - buf.WriteTo(new MemoryStream(output, offset, size, true)); + WriteBufTo(buf, new MemoryStream(output, offset, size)); return size; -#endif } public static void WriteZeroes(Stream outStr, long count) |