diff --git a/crypto/src/asn1/cryptopro/ECGOST3410NamedCurves.cs b/crypto/src/asn1/cryptopro/ECGOST3410NamedCurves.cs
index 998e0e06f..b3f55236c 100644
--- a/crypto/src/asn1/cryptopro/ECGOST3410NamedCurves.cs
+++ b/crypto/src/asn1/cryptopro/ECGOST3410NamedCurves.cs
@@ -15,9 +15,9 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
*/
public sealed class ECGost3410NamedCurves
{
- private ECGost3410NamedCurves()
- {
- }
+ private ECGost3410NamedCurves()
+ {
+ }
internal static readonly IDictionary objIds = Platform.CreateHashtable();
internal static readonly IDictionary parameters = Platform.CreateHashtable();
@@ -35,13 +35,12 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
ECDomainParameters ecParams = new ECDomainParameters(
curve,
- curve.CreatePoint(
- BigInteger.One, // x
- new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612"), // y
- false),
+ curve.CreatePoint(
+ BigInteger.One, // x
+ new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612")), // y
mod_q);
- parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProA] = ecParams;
+ parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProA] = ecParams;
mod_p = new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639319");
mod_q = new BigInteger("115792089237316195423570985008687907853073762908499243225378155805079068850323");
@@ -53,10 +52,9 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
ecParams = new ECDomainParameters(
curve,
- curve.CreatePoint(
- BigInteger.One, // x
- new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612"), // y
- false),
+ curve.CreatePoint(
+ BigInteger.One, // x
+ new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612")), // y
mod_q);
parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProXchA] = ecParams;
@@ -72,9 +70,8 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
ecParams = new ECDomainParameters(
curve,
curve.CreatePoint(
- BigInteger.One, // x
- new BigInteger("28792665814854611296992347458380284135028636778229113005756334730996303888124"), // y
- false),
+ BigInteger.One, // x
+ new BigInteger("28792665814854611296992347458380284135028636778229113005756334730996303888124")), // y
mod_q); // q
parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProB] = ecParams;
@@ -90,9 +87,8 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
ecParams = new ECDomainParameters(
curve,
curve.CreatePoint(
- BigInteger.Zero, // x
- new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247"), // y
- false),
+ BigInteger.Zero, // x
+ new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247")), // y
mod_q);
parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProXchB] = ecParams;
@@ -107,12 +103,11 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
ecParams = new ECDomainParameters(
curve,
curve.CreatePoint(
- BigInteger.Zero, // x
- new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247"), // y
- false),
+ BigInteger.Zero, // x
+ new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247")), // y
mod_q); // q
- parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProC] = ecParams;
+ parameters[CryptoProObjectIdentifiers.GostR3410x2001CryptoProC] = ecParams;
objIds["GostR3410-2001-CryptoPro-A"] = CryptoProObjectIdentifiers.GostR3410x2001CryptoProA;
objIds["GostR3410-2001-CryptoPro-B"] = CryptoProObjectIdentifiers.GostR3410x2001CryptoProB;
@@ -139,14 +134,14 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
return (ECDomainParameters) parameters[oid];
}
- /**
- * returns an enumeration containing the name strings for curves
- * contained in this structure.
- */
- public static IEnumerable Names
- {
- get { return new EnumerableProxy(objIds.Keys); }
- }
+ /**
+ * returns an enumeration containing the name strings for curves
+ * contained in this structure.
+ */
+ public static IEnumerable Names
+ {
+ get { return new EnumerableProxy(objIds.Keys); }
+ }
public static ECDomainParameters GetByName(
string name)
@@ -170,8 +165,8 @@ namespace Org.BouncyCastle.Asn1.CryptoPro
return (string) names[oid];
}
- public static DerObjectIdentifier GetOid(
- string name)
+ public static DerObjectIdentifier GetOid(
+ string name)
{
return (DerObjectIdentifier) objIds[name];
}
diff --git a/crypto/src/crypto/digests/SkeinEngine.cs b/crypto/src/crypto/digests/SkeinEngine.cs
index 43381e7cf..7e93138ac 100644
--- a/crypto/src/crypto/digests/SkeinEngine.cs
+++ b/crypto/src/crypto/digests/SkeinEngine.cs
@@ -8,797 +8,797 @@ using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Crypto.Digests
{
- /// <summary>
- /// Implementation of the Skein family of parameterised hash functions in 256, 512 and 1024 bit block
- /// sizes, based on the <see cref="Org.BouncyCastle.Crypto.Engines.ThreefishEngine">Threefish</see> tweakable block cipher.
- /// </summary>
- /// <remarks>
- /// This is the 1.3 version of Skein defined in the Skein hash function submission to the NIST SHA-3
- /// competition in October 2010.
- /// <p/>
- /// Skein was designed by Niels Ferguson - Stefan Lucks - Bruce Schneier - Doug Whiting - Mihir
- /// Bellare - Tadayoshi Kohno - Jon Callas - Jesse Walker.
- /// <p/>
- /// This implementation is the basis for <see cref="Org.BouncyCastle.Crypto.Digests.SkeinDigest"/> and <see cref="Org.BouncyCastle.Crypto.Macs.SkeinMac"/>, implementing the
- /// parameter based configuration system that allows Skein to be adapted to multiple applications. <br>
- /// Initialising the engine with <see cref="Org.BouncyCastle.Crypto.Parameters.SkeinParameters"/> allows standard and arbitrary parameters to
- /// be applied during the Skein hash function.
- /// <p/>
- /// Implemented:
- /// <ul>
- /// <li>256, 512 and 1024 bit internal states.</li>
- /// <li>Full 96 bit input length.</li>
- /// <li>Parameters defined in the Skein specification, and arbitrary other pre and post message
- /// parameters.</li>
- /// <li>Arbitrary output size in 1 byte intervals.</li>
- /// </ul>
- /// <p/>
- /// Not implemented:
- /// <ul>
- /// <li>Sub-byte length input (bit padding).</li>
- /// <li>Tree hashing.</li>
- /// </ul>
- /// </remarks>
- /// <seealso cref="Org.BouncyCastle.Crypto.Parameters.SkeinParameters"/>
- public class SkeinEngine
- : IMemoable
- {
- /// <summary>
- /// 256 bit block size - Skein-256
- /// </summary>
- public const int SKEIN_256 = ThreefishEngine.BLOCKSIZE_256;
- /// <summary>
- /// 512 bit block size - Skein-512
- /// </summary>
- public const int SKEIN_512 = ThreefishEngine.BLOCKSIZE_512;
- /// <summary>
- /// 1024 bit block size - Skein-1024
- /// </summary>
- public const int SKEIN_1024 = ThreefishEngine.BLOCKSIZE_1024;
-
- // Minimal at present, but more complex when tree hashing is implemented
- private class Configuration
- {
- private byte[] bytes = new byte[32];
-
- public Configuration(long outputSizeBits)
- {
- // 0..3 = ASCII SHA3
- bytes[0] = (byte)'S';
- bytes[1] = (byte)'H';
- bytes[2] = (byte)'A';
- bytes[3] = (byte)'3';
-
- // 4..5 = version number in LSB order
- bytes[4] = 1;
- bytes[5] = 0;
-
- // 8..15 = output length
- ThreefishEngine.WordToBytes((ulong)outputSizeBits, bytes, 8);
- }
-
- public byte[] Bytes
- {
- get { return bytes; }
- }
-
- }
-
- public class Parameter
- {
- private int type;
- private byte[] value;
-
- public Parameter(int type, byte[] value)
- {
- this.type = type;
- this.value = value;
- }
-
- public int Type
- {
- get { return type; }
- }
-
- public byte[] Value
- {
- get { return value; }
- }
-
- }
-
- /**
- * The parameter type for the Skein key.
- */
- private const int PARAM_TYPE_KEY = 0;
-
- /**
- * The parameter type for the Skein configuration block.
- */
- private const int PARAM_TYPE_CONFIG = 4;
-
- /**
- * The parameter type for the message.
- */
- private const int PARAM_TYPE_MESSAGE = 48;
-
- /**
- * The parameter type for the output transformation.
- */
- private const int PARAM_TYPE_OUTPUT = 63;
-
- /**
- * Precalculated UBI(CFG) states for common state/output combinations without key or other
- * pre-message params.
- */
- private static readonly IDictionary INITIAL_STATES = Platform.CreateHashtable();
-
- static SkeinEngine()
- {
- // From Appendix C of the Skein 1.3 NIST submission
- InitialState(SKEIN_256, 128, new ulong[]{
- 0xe1111906964d7260UL,
- 0x883daaa77c8d811cUL,
- 0x10080df491960f7aUL,
- 0xccf7dde5b45bc1c2UL});
-
- InitialState(SKEIN_256, 160, new ulong[]{
- 0x1420231472825e98UL,
- 0x2ac4e9a25a77e590UL,
- 0xd47a58568838d63eUL,
- 0x2dd2e4968586ab7dUL});
-
- InitialState(SKEIN_256, 224, new ulong[]{
- 0xc6098a8c9ae5ea0bUL,
- 0x876d568608c5191cUL,
- 0x99cb88d7d7f53884UL,
- 0x384bddb1aeddb5deUL});
-
- InitialState(SKEIN_256, 256, new ulong[]{
- 0xfc9da860d048b449UL,
- 0x2fca66479fa7d833UL,
- 0xb33bc3896656840fUL,
- 0x6a54e920fde8da69UL});
-
- InitialState(SKEIN_512, 128, new ulong[]{
- 0xa8bc7bf36fbf9f52UL,
- 0x1e9872cebd1af0aaUL,
- 0x309b1790b32190d3UL,
- 0xbcfbb8543f94805cUL,
- 0x0da61bcd6e31b11bUL,
- 0x1a18ebead46a32e3UL,
- 0xa2cc5b18ce84aa82UL,
- 0x6982ab289d46982dUL});
-
- InitialState(SKEIN_512, 160, new ulong[]{
- 0x28b81a2ae013bd91UL,
- 0xc2f11668b5bdf78fUL,
- 0x1760d8f3f6a56f12UL,
- 0x4fb747588239904fUL,
- 0x21ede07f7eaf5056UL,
- 0xd908922e63ed70b8UL,
- 0xb8ec76ffeccb52faUL,
- 0x01a47bb8a3f27a6eUL});
-
- InitialState(SKEIN_512, 224, new ulong[]{
- 0xccd0616248677224UL,
- 0xcba65cf3a92339efUL,
- 0x8ccd69d652ff4b64UL,
- 0x398aed7b3ab890b4UL,
- 0x0f59d1b1457d2bd0UL,
- 0x6776fe6575d4eb3dUL,
- 0x99fbc70e997413e9UL,
- 0x9e2cfccfe1c41ef7UL});
-
- InitialState(SKEIN_512, 384, new ulong[]{
- 0xa3f6c6bf3a75ef5fUL,
- 0xb0fef9ccfd84faa4UL,
- 0x9d77dd663d770cfeUL,
- 0xd798cbf3b468fddaUL,
- 0x1bc4a6668a0e4465UL,
- 0x7ed7d434e5807407UL,
- 0x548fc1acd4ec44d6UL,
- 0x266e17546aa18ff8UL});
-
- InitialState(SKEIN_512, 512, new ulong[]{
- 0x4903adff749c51ceUL,
- 0x0d95de399746df03UL,
- 0x8fd1934127c79bceUL,
- 0x9a255629ff352cb1UL,
- 0x5db62599df6ca7b0UL,
- 0xeabe394ca9d5c3f4UL,
- 0x991112c71a75b523UL,
- 0xae18a40b660fcc33UL});
- }
-
- private static void InitialState(int blockSize, int outputSize, ulong[] state)
- {
- INITIAL_STATES.Add(VariantIdentifier(blockSize / 8, outputSize / 8), state);
- }
-
- private static int VariantIdentifier(int blockSizeBytes, int outputSizeBytes)
- {
- return (outputSizeBytes << 16) | blockSizeBytes;
- }
-
- private class UbiTweak
- {
- /**
- * Point at which position might overflow long, so switch to add with carry logic
- */
- private const ulong LOW_RANGE = UInt64.MaxValue - UInt32.MaxValue;
-
- /**
- * Bit 127 = final
- */
- private const ulong T1_FINAL = 1UL << 63;
-
- /**
- * Bit 126 = first
- */
- private const ulong T1_FIRST = 1UL << 62;
-
- /**
- * UBI uses a 128 bit tweak
- */
- private ulong[] tweak = new ulong[2];
-
- /**
- * Whether 64 bit position exceeded
- */
- private bool extendedPosition;
-
- public UbiTweak()
- {
- Reset();
- }
-
- public void Reset(UbiTweak tweak)
- {
- this.tweak = Arrays.Clone(tweak.tweak, this.tweak);
- this.extendedPosition = tweak.extendedPosition;
- }
-
- public void Reset()
- {
- tweak[0] = 0;
- tweak[1] = 0;
- extendedPosition = false;
- First = true;
- }
-
- public uint Type
- {
- get
- {
- return (uint)((tweak[1] >> 56) & 0x3FUL);
- }
-
- set
- {
- // Bits 120..125 = type
- tweak[1] = (tweak[1] & 0xFFFFFFC000000000UL) | ((value & 0x3FUL) << 56);
- }
- }
-
- public bool First
- {
- get
- {
- return ((tweak[1] & T1_FIRST) != 0);
- }
- set
- {
- if (value)
- {
- tweak[1] |= T1_FIRST;
- }
- else
- {
- tweak[1] &= ~T1_FIRST;
- }
- }
- }
-
- public bool Final
- {
- get
- {
- return ((tweak[1] & T1_FINAL) != 0);
- }
- set
- {
- if (value)
- {
- tweak[1] |= T1_FINAL;
- }
- else
- {
- tweak[1] &= ~T1_FINAL;
- }
- }
- }
-
- /**
- * Advances the position in the tweak by the specified value.
- */
- public void AdvancePosition(int advance)
- {
- // Bits 0..95 = position
- if (extendedPosition)
- {
- ulong[] parts = new ulong[3];
- parts[0] = tweak[0] & 0xFFFFFFFFUL;
- parts[1] = (tweak[0] >> 32) & 0xFFFFFFFFUL;
- parts[2] = tweak[1] & 0xFFFFFFFFUL;
-
- ulong carry = (ulong)advance;
- for (int i = 0; i < parts.Length; i++)
- {
- carry += parts[i];
- parts[i] = carry;
- carry >>= 32;
- }
- tweak[0] = ((parts[1] & 0xFFFFFFFFUL) << 32) | (parts[0] & 0xFFFFFFFFUL);
- tweak[1] = (tweak[1] & 0xFFFFFFFF00000000UL) | (parts[2] & 0xFFFFFFFFUL);
- }
- else
- {
- ulong position = tweak[0];
- position += (uint)advance;
- tweak[0] = position;
- if (position > LOW_RANGE)
- {
- extendedPosition = true;
- }
- }
- }
-
- public ulong[] GetWords()
- {
- return tweak;
- }
-
- public override string ToString()
- {
- return Type + " first: " + First + ", final: " + Final;
- }
-
- }
-
- /**
- * The Unique Block Iteration chaining mode.
- */
- // TODO: This might be better as methods...
- private class UBI
- {
- private readonly UbiTweak tweak = new UbiTweak();
-
- private readonly SkeinEngine engine;
-
- /**
- * Buffer for the current block of message data
- */
- private byte[] currentBlock;
-
- /**
- * Offset into the current message block
- */
- private int currentOffset;
-
- /**
- * Buffer for message words for feedback into encrypted block
- */
- private ulong[] message;
-
- public UBI(SkeinEngine engine, int blockSize)
- {
- this.engine = engine;
- currentBlock = new byte[blockSize];
- message = new ulong[currentBlock.Length / 8];
- }
-
- public void Reset(UBI ubi)
- {
- currentBlock = Arrays.Clone(ubi.currentBlock, currentBlock);
- currentOffset = ubi.currentOffset;
- message = Arrays.Clone(ubi.message, this.message);
- tweak.Reset(ubi.tweak);
- }
-
- public void Reset(int type)
- {
- tweak.Reset();
- tweak.Type = (uint)type;
- currentOffset = 0;
- }
-
- public void Update(byte[] value, int offset, int len, ulong[] output)
- {
- /*
- * Buffer complete blocks for the underlying Threefish cipher, only flushing when there
- * are subsequent bytes (last block must be processed in doFinal() with final=true set).
- */
- int copied = 0;
- while (len > copied)
- {
- if (currentOffset == currentBlock.Length)
- {
- ProcessBlock(output);
- tweak.First = false;
- currentOffset = 0;
- }
-
- int toCopy = System.Math.Min((len - copied), currentBlock.Length - currentOffset);
- Array.Copy(value, offset + copied, currentBlock, currentOffset, toCopy);
- copied += toCopy;
- currentOffset += toCopy;
- tweak.AdvancePosition(toCopy);
- }
- }
-
- private void ProcessBlock(ulong[] output)
- {
- engine.threefish.Init(true, engine.chain, tweak.GetWords());
- for (int i = 0; i < message.Length; i++)
- {
- message[i] = ThreefishEngine.BytesToWord(currentBlock, i * 8);
- }
-
- engine.threefish.ProcessBlock(message, output);
-
- for (int i = 0; i < output.Length; i++)
- {
- output[i] ^= message[i];
- }
- }
-
- public void DoFinal(ulong[] output)
- {
- // Pad remainder of current block with zeroes
- for (int i = currentOffset; i < currentBlock.Length; i++)
- {
- currentBlock[i] = 0;
- }
-
- tweak.Final = true;
- ProcessBlock(output);
- }
-
- }
-
- /**
- * Underlying Threefish tweakable block cipher
- */
- private readonly ThreefishEngine threefish;
-
- /**
- * Size of the digest output, in bytes
- */
- private readonly int outputSizeBytes;
-
- /**
- * The current chaining/state value
- */
- private ulong[] chain;
-
- /**
- * The initial state value
- */
- private ulong[] initialState;
-
- /**
- * The (optional) key parameter
- */
- private byte[] key;
-
- /**
- * Parameters to apply prior to the message
- */
- private Parameter[] preMessageParameters;
-
- /**
- * Parameters to apply after the message, but prior to output
- */
- private Parameter[] postMessageParameters;
-
- /**
- * The current UBI operation
- */
- private readonly UBI ubi;
-
- /**
- * Buffer for single byte update method
- */
- private readonly byte[] singleByte = new byte[1];
-
- /// <summary>
- /// Constructs a Skein digest with an internal state size and output size.
- /// </summary>
- /// <param name="stateSizeBits">the internal state size in bits - one of <see cref="SKEIN_256"/> <see cref="SKEIN_512"/> or
- /// <see cref="SKEIN_1024"/>.</param>
- /// <param name="outputSizeBits">the output/digest size to produce in bits, which must be an integral number of
- /// bytes.</param>
- public SkeinEngine(int blockSizeBits, int outputSizeBits)
- {
- if (outputSizeBits % 8 != 0)
- {
- throw new ArgumentException("Output size must be a multiple of 8 bits. :" + outputSizeBits);
- }
- // TODO: Prevent digest sizes > block size?
- this.outputSizeBytes = outputSizeBits / 8;
-
- this.threefish = new ThreefishEngine(blockSizeBits);
- this.ubi = new UBI(this,threefish.GetBlockSize());
- }
-
- /// <summary>
- /// Creates a SkeinEngine as an exact copy of an existing instance.
- /// </summary>
- public SkeinEngine(SkeinEngine engine)
- : this(engine.BlockSize * 8, engine.OutputSize * 8)
- {
- CopyIn(engine);
- }
-
- private void CopyIn(SkeinEngine engine)
- {
- this.ubi.Reset(engine.ubi);
- this.chain = Arrays.Clone(engine.chain, this.chain);
- this.initialState = Arrays.Clone(engine.initialState, this.initialState);
- this.key = Arrays.Clone(engine.key, this.key);
- this.preMessageParameters = Clone(engine.preMessageParameters, this.preMessageParameters);
- this.postMessageParameters = Clone(engine.postMessageParameters, this.postMessageParameters);
- }
-
- private static Parameter[] Clone(Parameter[] data, Parameter[] existing)
- {
- if (data == null)
- {
- return null;
- }
- if ((existing == null) || (existing.Length != data.Length))
- {
- existing = new Parameter[data.Length];
- }
- Array.Copy(data, 0, existing, 0, existing.Length);
- return existing;
- }
-
- public IMemoable Copy()
- {
- return new SkeinEngine(this);
- }
-
- public void Reset(IMemoable other)
- {
- SkeinEngine s = (SkeinEngine)other;
- if ((BlockSize != s.BlockSize) || (outputSizeBytes != s.outputSizeBytes))
- {
- throw new MemoableResetException("Incompatible parameters in provided SkeinEngine.");
- }
- CopyIn(s);
- }
-
- public int OutputSize
- {
- get { return outputSizeBytes; }
- }
-
- public int BlockSize
- {
- get { return threefish.GetBlockSize (); }
- }
-
- /// <summary>
- /// Initialises the Skein engine with the provided parameters. See <see cref="Org.BouncyCastle.Crypto.Parameters.SkeinParameters"/> for
- /// details on the parameterisation of the Skein hash function.
- /// </summary>
- /// <param name="parameters">the parameters to apply to this engine, or <code>null</code> to use no parameters.</param>
- public void Init(SkeinParameters parameters)
- {
- this.chain = null;
- this.key = null;
- this.preMessageParameters = null;
- this.postMessageParameters = null;
-
- if (parameters != null)
- {
- byte[] key = parameters.GetKey();
- if (key.Length < 16)
- {
- throw new ArgumentException("Skein key must be at least 128 bits.");
- }
- InitParams(parameters.GetParameters());
- }
- CreateInitialState();
-
- // Initialise message block
- UbiInit(PARAM_TYPE_MESSAGE);
- }
-
- private void InitParams(IDictionary parameters)
- {
- IEnumerator keys = parameters.Keys.GetEnumerator();
- IList pre = Platform.CreateArrayList();
- IList post = Platform.CreateArrayList();
-
- while (keys.MoveNext())
- {
- int type = (int)keys.Current;
- byte[] value = (byte[])parameters[type];
-
- if (type == PARAM_TYPE_KEY)
- {
- this.key = value;
- }
- else if (type < PARAM_TYPE_MESSAGE)
- {
- pre.Add(new Parameter(type, value));
- }
- else
- {
- post.Add(new Parameter(type, value));
- }
- }
- preMessageParameters = new Parameter[pre.Count];
- pre.CopyTo(preMessageParameters, 0);
- Array.Sort(preMessageParameters);
-
- postMessageParameters = new Parameter[post.Count];
- post.CopyTo(postMessageParameters, 0);
- Array.Sort(postMessageParameters);
- }
-
- /**
- * Calculate the initial (pre message block) chaining state.
- */
- private void CreateInitialState()
- {
- ulong[] precalc = (ulong[])INITIAL_STATES[VariantIdentifier(BlockSize, OutputSize)];
- if ((key == null) && (precalc != null))
- {
- // Precalculated UBI(CFG)
- chain = Arrays.Clone(precalc);
- }
- else
- {
- // Blank initial state
- chain = new ulong[BlockSize / 8];
-
- // Process key block
- if (key != null)
- {
- UbiComplete(SkeinParameters.PARAM_TYPE_KEY, key);
- }
-
- // Process configuration block
- UbiComplete(PARAM_TYPE_CONFIG, new Configuration(outputSizeBytes * 8).Bytes);
- }
-
- // Process additional pre-message parameters
- if (preMessageParameters != null)
- {
- for (int i = 0; i < preMessageParameters.Length; i++)
- {
- Parameter param = preMessageParameters[i];
- UbiComplete(param.Type, param.Value);
- }
- }
- initialState = Arrays.Clone(chain);
- }
-
- /// <summary>
- /// Reset the engine to the initial state (with the key and any pre-message parameters , ready to
- /// accept message input.
- /// </summary>
- public void Reset()
- {
- Array.Copy(initialState, 0, chain, 0, chain.Length);
-
- UbiInit(PARAM_TYPE_MESSAGE);
- }
-
- private void UbiComplete(int type, byte[] value)
- {
- UbiInit(type);
- this.ubi.Update(value, 0, value.Length, chain);
- UbiFinal();
- }
-
- private void UbiInit(int type)
- {
- this.ubi.Reset(type);
- }
-
- private void UbiFinal()
- {
- ubi.DoFinal(chain);
- }
-
- private void CheckInitialised()
- {
- if (this.ubi == null)
- {
- throw new ArgumentException("Skein engine is not initialised.");
- }
- }
-
- public void Update(byte inByte)
- {
- singleByte[0] = inByte;
- Update(singleByte, 0, 1);
- }
-
- public void Update(byte[] inBytes, int inOff, int len)
- {
- CheckInitialised();
- ubi.Update(inBytes, inOff, len, chain);
- }
-
- public int DoFinal(byte[] outBytes, int outOff)
- {
- CheckInitialised();
- if (outBytes.Length < (outOff + outputSizeBytes))
- {
- throw new DataLengthException("Output buffer is too short to hold output of " + outputSizeBytes + " bytes");
- }
-
- // Finalise message block
- UbiFinal();
-
- // Process additional post-message parameters
- if (postMessageParameters != null)
- {
- for (int i = 0; i < postMessageParameters.Length; i++)
- {
- Parameter param = postMessageParameters[i];
- UbiComplete(param.Type, param.Value);
- }
- }
-
- // Perform the output transform
- int blockSize = BlockSize;
- int blocksRequired = ((outputSizeBytes + blockSize - 1) / blockSize);
- for (int i = 0; i < blocksRequired; i++)
- {
- int toWrite = System.Math.Min(blockSize, outputSizeBytes - (i * blockSize));
- Output((ulong)i, outBytes, outOff + (i * blockSize), toWrite);
- }
-
- Reset();
-
- return outputSizeBytes;
- }
-
- private void Output(ulong outputSequence, byte[] outBytes, int outOff, int outputBytes)
- {
- byte[] currentBytes = new byte[8];
- ThreefishEngine.WordToBytes(outputSequence, currentBytes, 0);
-
- // Output is a sequence of UBI invocations all of which use and preserve the pre-output
- // state
- ulong[] outputWords = new ulong[chain.Length];
- UbiInit(PARAM_TYPE_OUTPUT);
- this.ubi.Update(currentBytes, 0, currentBytes.Length, outputWords);
- ubi.DoFinal(outputWords);
-
- int wordsRequired = ((outputBytes + 8 - 1) / 8);
- for (int i = 0; i < wordsRequired; i++)
- {
- int toWrite = System.Math.Min(8, outputBytes - (i * 8));
- if (toWrite == 8)
- {
- ThreefishEngine.WordToBytes(outputWords[i], outBytes, outOff + (i * 8));
- }
- else
- {
- ThreefishEngine.WordToBytes(outputWords[i], currentBytes, 0);
- Array.Copy(currentBytes, 0, outBytes, outOff + (i * 8), toWrite);
- }
- }
- }
-
- }
+ /// <summary>
+ /// Implementation of the Skein family of parameterised hash functions in 256, 512 and 1024 bit block
+ /// sizes, based on the <see cref="Org.BouncyCastle.Crypto.Engines.ThreefishEngine">Threefish</see> tweakable block cipher.
+ /// </summary>
+ /// <remarks>
+ /// This is the 1.3 version of Skein defined in the Skein hash function submission to the NIST SHA-3
+ /// competition in October 2010.
+ /// <p/>
+ /// Skein was designed by Niels Ferguson - Stefan Lucks - Bruce Schneier - Doug Whiting - Mihir
+ /// Bellare - Tadayoshi Kohno - Jon Callas - Jesse Walker.
+ /// <p/>
+ /// This implementation is the basis for <see cref="Org.BouncyCastle.Crypto.Digests.SkeinDigest"/> and <see cref="Org.BouncyCastle.Crypto.Macs.SkeinMac"/>, implementing the
+ /// parameter based configuration system that allows Skein to be adapted to multiple applications. <br/>
+ /// Initialising the engine with <see cref="Org.BouncyCastle.Crypto.Parameters.SkeinParameters"/> allows standard and arbitrary parameters to
+ /// be applied during the Skein hash function.
+ /// <p/>
+ /// Implemented:
+ /// <ul>
+ /// <li>256, 512 and 1024 bit internal states.</li>
+ /// <li>Full 96 bit input length.</li>
+ /// <li>Parameters defined in the Skein specification, and arbitrary other pre and post message
+ /// parameters.</li>
+ /// <li>Arbitrary output size in 1 byte intervals.</li>
+ /// </ul>
+ /// <p/>
+ /// Not implemented:
+ /// <ul>
+ /// <li>Sub-byte length input (bit padding).</li>
+ /// <li>Tree hashing.</li>
+ /// </ul>
+ /// </remarks>
+ /// <seealso cref="Org.BouncyCastle.Crypto.Parameters.SkeinParameters"/>
+ public class SkeinEngine
+ : IMemoable
+ {
+ /// <summary>
+ /// 256 bit block size - Skein-256
+ /// </summary>
+ public const int SKEIN_256 = ThreefishEngine.BLOCKSIZE_256;
+ /// <summary>
+ /// 512 bit block size - Skein-512
+ /// </summary>
+ public const int SKEIN_512 = ThreefishEngine.BLOCKSIZE_512;
+ /// <summary>
+ /// 1024 bit block size - Skein-1024
+ /// </summary>
+ public const int SKEIN_1024 = ThreefishEngine.BLOCKSIZE_1024;
+
+ // Minimal at present, but more complex when tree hashing is implemented
+ private class Configuration
+ {
+ private byte[] bytes = new byte[32];
+
+ public Configuration(long outputSizeBits)
+ {
+ // 0..3 = ASCII SHA3
+ bytes[0] = (byte)'S';
+ bytes[1] = (byte)'H';
+ bytes[2] = (byte)'A';
+ bytes[3] = (byte)'3';
+
+ // 4..5 = version number in LSB order
+ bytes[4] = 1;
+ bytes[5] = 0;
+
+ // 8..15 = output length
+ ThreefishEngine.WordToBytes((ulong)outputSizeBits, bytes, 8);
+ }
+
+ public byte[] Bytes
+ {
+ get { return bytes; }
+ }
+
+ }
+
+ public class Parameter
+ {
+ private int type;
+ private byte[] value;
+
+ public Parameter(int type, byte[] value)
+ {
+ this.type = type;
+ this.value = value;
+ }
+
+ public int Type
+ {
+ get { return type; }
+ }
+
+ public byte[] Value
+ {
+ get { return value; }
+ }
+
+ }
+
+ /**
+ * The parameter type for the Skein key.
+ */
+ private const int PARAM_TYPE_KEY = 0;
+
+ /**
+ * The parameter type for the Skein configuration block.
+ */
+ private const int PARAM_TYPE_CONFIG = 4;
+
+ /**
+ * The parameter type for the message.
+ */
+ private const int PARAM_TYPE_MESSAGE = 48;
+
+ /**
+ * The parameter type for the output transformation.
+ */
+ private const int PARAM_TYPE_OUTPUT = 63;
+
+ /**
+ * Precalculated UBI(CFG) states for common state/output combinations without key or other
+ * pre-message params.
+ */
+ private static readonly IDictionary INITIAL_STATES = Platform.CreateHashtable();
+
+ static SkeinEngine()
+ {
+ // From Appendix C of the Skein 1.3 NIST submission
+ InitialState(SKEIN_256, 128, new ulong[]{
+ 0xe1111906964d7260UL,
+ 0x883daaa77c8d811cUL,
+ 0x10080df491960f7aUL,
+ 0xccf7dde5b45bc1c2UL});
+
+ InitialState(SKEIN_256, 160, new ulong[]{
+ 0x1420231472825e98UL,
+ 0x2ac4e9a25a77e590UL,
+ 0xd47a58568838d63eUL,
+ 0x2dd2e4968586ab7dUL});
+
+ InitialState(SKEIN_256, 224, new ulong[]{
+ 0xc6098a8c9ae5ea0bUL,
+ 0x876d568608c5191cUL,
+ 0x99cb88d7d7f53884UL,
+ 0x384bddb1aeddb5deUL});
+
+ InitialState(SKEIN_256, 256, new ulong[]{
+ 0xfc9da860d048b449UL,
+ 0x2fca66479fa7d833UL,
+ 0xb33bc3896656840fUL,
+ 0x6a54e920fde8da69UL});
+
+ InitialState(SKEIN_512, 128, new ulong[]{
+ 0xa8bc7bf36fbf9f52UL,
+ 0x1e9872cebd1af0aaUL,
+ 0x309b1790b32190d3UL,
+ 0xbcfbb8543f94805cUL,
+ 0x0da61bcd6e31b11bUL,
+ 0x1a18ebead46a32e3UL,
+ 0xa2cc5b18ce84aa82UL,
+ 0x6982ab289d46982dUL});
+
+ InitialState(SKEIN_512, 160, new ulong[]{
+ 0x28b81a2ae013bd91UL,
+ 0xc2f11668b5bdf78fUL,
+ 0x1760d8f3f6a56f12UL,
+ 0x4fb747588239904fUL,
+ 0x21ede07f7eaf5056UL,
+ 0xd908922e63ed70b8UL,
+ 0xb8ec76ffeccb52faUL,
+ 0x01a47bb8a3f27a6eUL});
+
+ InitialState(SKEIN_512, 224, new ulong[]{
+ 0xccd0616248677224UL,
+ 0xcba65cf3a92339efUL,
+ 0x8ccd69d652ff4b64UL,
+ 0x398aed7b3ab890b4UL,
+ 0x0f59d1b1457d2bd0UL,
+ 0x6776fe6575d4eb3dUL,
+ 0x99fbc70e997413e9UL,
+ 0x9e2cfccfe1c41ef7UL});
+
+ InitialState(SKEIN_512, 384, new ulong[]{
+ 0xa3f6c6bf3a75ef5fUL,
+ 0xb0fef9ccfd84faa4UL,
+ 0x9d77dd663d770cfeUL,
+ 0xd798cbf3b468fddaUL,
+ 0x1bc4a6668a0e4465UL,
+ 0x7ed7d434e5807407UL,
+ 0x548fc1acd4ec44d6UL,
+ 0x266e17546aa18ff8UL});
+
+ InitialState(SKEIN_512, 512, new ulong[]{
+ 0x4903adff749c51ceUL,
+ 0x0d95de399746df03UL,
+ 0x8fd1934127c79bceUL,
+ 0x9a255629ff352cb1UL,
+ 0x5db62599df6ca7b0UL,
+ 0xeabe394ca9d5c3f4UL,
+ 0x991112c71a75b523UL,
+ 0xae18a40b660fcc33UL});
+ }
+
+ private static void InitialState(int blockSize, int outputSize, ulong[] state)
+ {
+ INITIAL_STATES.Add(VariantIdentifier(blockSize / 8, outputSize / 8), state);
+ }
+
+ private static int VariantIdentifier(int blockSizeBytes, int outputSizeBytes)
+ {
+ return (outputSizeBytes << 16) | blockSizeBytes;
+ }
+
+ private class UbiTweak
+ {
+ /**
+ * Point at which position might overflow long, so switch to add with carry logic
+ */
+ private const ulong LOW_RANGE = UInt64.MaxValue - UInt32.MaxValue;
+
+ /**
+ * Bit 127 = final
+ */
+ private const ulong T1_FINAL = 1UL << 63;
+
+ /**
+ * Bit 126 = first
+ */
+ private const ulong T1_FIRST = 1UL << 62;
+
+ /**
+ * UBI uses a 128 bit tweak
+ */
+ private ulong[] tweak = new ulong[2];
+
+ /**
+ * Whether 64 bit position exceeded
+ */
+ private bool extendedPosition;
+
+ public UbiTweak()
+ {
+ Reset();
+ }
+
+ public void Reset(UbiTweak tweak)
+ {
+ this.tweak = Arrays.Clone(tweak.tweak, this.tweak);
+ this.extendedPosition = tweak.extendedPosition;
+ }
+
+ public void Reset()
+ {
+ tweak[0] = 0;
+ tweak[1] = 0;
+ extendedPosition = false;
+ First = true;
+ }
+
+ public uint Type
+ {
+ get
+ {
+ return (uint)((tweak[1] >> 56) & 0x3FUL);
+ }
+
+ set
+ {
+ // Bits 120..125 = type
+ tweak[1] = (tweak[1] & 0xFFFFFFC000000000UL) | ((value & 0x3FUL) << 56);
+ }
+ }
+
+ public bool First
+ {
+ get
+ {
+ return ((tweak[1] & T1_FIRST) != 0);
+ }
+ set
+ {
+ if (value)
+ {
+ tweak[1] |= T1_FIRST;
+ }
+ else
+ {
+ tweak[1] &= ~T1_FIRST;
+ }
+ }
+ }
+
+ public bool Final
+ {
+ get
+ {
+ return ((tweak[1] & T1_FINAL) != 0);
+ }
+ set
+ {
+ if (value)
+ {
+ tweak[1] |= T1_FINAL;
+ }
+ else
+ {
+ tweak[1] &= ~T1_FINAL;
+ }
+ }
+ }
+
+ /**
+ * Advances the position in the tweak by the specified value.
+ */
+ public void AdvancePosition(int advance)
+ {
+ // Bits 0..95 = position
+ if (extendedPosition)
+ {
+ ulong[] parts = new ulong[3];
+ parts[0] = tweak[0] & 0xFFFFFFFFUL;
+ parts[1] = (tweak[0] >> 32) & 0xFFFFFFFFUL;
+ parts[2] = tweak[1] & 0xFFFFFFFFUL;
+
+ ulong carry = (ulong)advance;
+ for (int i = 0; i < parts.Length; i++)
+ {
+ carry += parts[i];
+ parts[i] = carry;
+ carry >>= 32;
+ }
+ tweak[0] = ((parts[1] & 0xFFFFFFFFUL) << 32) | (parts[0] & 0xFFFFFFFFUL);
+ tweak[1] = (tweak[1] & 0xFFFFFFFF00000000UL) | (parts[2] & 0xFFFFFFFFUL);
+ }
+ else
+ {
+ ulong position = tweak[0];
+ position += (uint)advance;
+ tweak[0] = position;
+ if (position > LOW_RANGE)
+ {
+ extendedPosition = true;
+ }
+ }
+ }
+
+ public ulong[] GetWords()
+ {
+ return tweak;
+ }
+
+ public override string ToString()
+ {
+ return Type + " first: " + First + ", final: " + Final;
+ }
+
+ }
+
+ /**
+ * The Unique Block Iteration chaining mode.
+ */
+ // TODO: This might be better as methods...
+ private class UBI
+ {
+ private readonly UbiTweak tweak = new UbiTweak();
+
+ private readonly SkeinEngine engine;
+
+ /**
+ * Buffer for the current block of message data
+ */
+ private byte[] currentBlock;
+
+ /**
+ * Offset into the current message block
+ */
+ private int currentOffset;
+
+ /**
+ * Buffer for message words for feedback into encrypted block
+ */
+ private ulong[] message;
+
+ public UBI(SkeinEngine engine, int blockSize)
+ {
+ this.engine = engine;
+ currentBlock = new byte[blockSize];
+ message = new ulong[currentBlock.Length / 8];
+ }
+
+ public void Reset(UBI ubi)
+ {
+ currentBlock = Arrays.Clone(ubi.currentBlock, currentBlock);
+ currentOffset = ubi.currentOffset;
+ message = Arrays.Clone(ubi.message, this.message);
+ tweak.Reset(ubi.tweak);
+ }
+
+ public void Reset(int type)
+ {
+ tweak.Reset();
+ tweak.Type = (uint)type;
+ currentOffset = 0;
+ }
+
+ public void Update(byte[] value, int offset, int len, ulong[] output)
+ {
+ /*
+ * Buffer complete blocks for the underlying Threefish cipher, only flushing when there
+ * are subsequent bytes (last block must be processed in doFinal() with final=true set).
+ */
+ int copied = 0;
+ while (len > copied)
+ {
+ if (currentOffset == currentBlock.Length)
+ {
+ ProcessBlock(output);
+ tweak.First = false;
+ currentOffset = 0;
+ }
+
+ int toCopy = System.Math.Min((len - copied), currentBlock.Length - currentOffset);
+ Array.Copy(value, offset + copied, currentBlock, currentOffset, toCopy);
+ copied += toCopy;
+ currentOffset += toCopy;
+ tweak.AdvancePosition(toCopy);
+ }
+ }
+
+ private void ProcessBlock(ulong[] output)
+ {
+ engine.threefish.Init(true, engine.chain, tweak.GetWords());
+ for (int i = 0; i < message.Length; i++)
+ {
+ message[i] = ThreefishEngine.BytesToWord(currentBlock, i * 8);
+ }
+
+ engine.threefish.ProcessBlock(message, output);
+
+ for (int i = 0; i < output.Length; i++)
+ {
+ output[i] ^= message[i];
+ }
+ }
+
+ public void DoFinal(ulong[] output)
+ {
+ // Pad remainder of current block with zeroes
+ for (int i = currentOffset; i < currentBlock.Length; i++)
+ {
+ currentBlock[i] = 0;
+ }
+
+ tweak.Final = true;
+ ProcessBlock(output);
+ }
+
+ }
+
+ /**
+ * Underlying Threefish tweakable block cipher
+ */
+ private readonly ThreefishEngine threefish;
+
+ /**
+ * Size of the digest output, in bytes
+ */
+ private readonly int outputSizeBytes;
+
+ /**
+ * The current chaining/state value
+ */
+ private ulong[] chain;
+
+ /**
+ * The initial state value
+ */
+ private ulong[] initialState;
+
+ /**
+ * The (optional) key parameter
+ */
+ private byte[] key;
+
+ /**
+ * Parameters to apply prior to the message
+ */
+ private Parameter[] preMessageParameters;
+
+ /**
+ * Parameters to apply after the message, but prior to output
+ */
+ private Parameter[] postMessageParameters;
+
+ /**
+ * The current UBI operation
+ */
+ private readonly UBI ubi;
+
+ /**
+ * Buffer for single byte update method
+ */
+ private readonly byte[] singleByte = new byte[1];
+
+ /// <summary>
+ /// Constructs a Skein digest with an internal state size and output size.
+ /// </summary>
+ /// <param name="blockSizeBits">the internal state size in bits - one of <see cref="SKEIN_256"/> <see cref="SKEIN_512"/> or
+ /// <see cref="SKEIN_1024"/>.</param>
+ /// <param name="outputSizeBits">the output/digest size to produce in bits, which must be an integral number of
+ /// bytes.</param>
+ public SkeinEngine(int blockSizeBits, int outputSizeBits)
+ {
+ if (outputSizeBits % 8 != 0)
+ {
+ throw new ArgumentException("Output size must be a multiple of 8 bits. :" + outputSizeBits);
+ }
+ // TODO: Prevent digest sizes > block size?
+ this.outputSizeBytes = outputSizeBits / 8;
+
+ this.threefish = new ThreefishEngine(blockSizeBits);
+ this.ubi = new UBI(this,threefish.GetBlockSize());
+ }
+
+ /// <summary>
+ /// Creates a SkeinEngine as an exact copy of an existing instance.
+ /// </summary>
+ public SkeinEngine(SkeinEngine engine)
+ : this(engine.BlockSize * 8, engine.OutputSize * 8)
+ {
+ CopyIn(engine);
+ }
+
+ private void CopyIn(SkeinEngine engine)
+ {
+ this.ubi.Reset(engine.ubi);
+ this.chain = Arrays.Clone(engine.chain, this.chain);
+ this.initialState = Arrays.Clone(engine.initialState, this.initialState);
+ this.key = Arrays.Clone(engine.key, this.key);
+ this.preMessageParameters = Clone(engine.preMessageParameters, this.preMessageParameters);
+ this.postMessageParameters = Clone(engine.postMessageParameters, this.postMessageParameters);
+ }
+
+ private static Parameter[] Clone(Parameter[] data, Parameter[] existing)
+ {
+ if (data == null)
+ {
+ return null;
+ }
+ if ((existing == null) || (existing.Length != data.Length))
+ {
+ existing = new Parameter[data.Length];
+ }
+ Array.Copy(data, 0, existing, 0, existing.Length);
+ return existing;
+ }
+
+ public IMemoable Copy()
+ {
+ return new SkeinEngine(this);
+ }
+
+ public void Reset(IMemoable other)
+ {
+ SkeinEngine s = (SkeinEngine)other;
+ if ((BlockSize != s.BlockSize) || (outputSizeBytes != s.outputSizeBytes))
+ {
+ throw new MemoableResetException("Incompatible parameters in provided SkeinEngine.");
+ }
+ CopyIn(s);
+ }
+
+ public int OutputSize
+ {
+ get { return outputSizeBytes; }
+ }
+
+ public int BlockSize
+ {
+ get { return threefish.GetBlockSize (); }
+ }
+
+ /// <summary>
+ /// Initialises the Skein engine with the provided parameters. See <see cref="Org.BouncyCastle.Crypto.Parameters.SkeinParameters"/> for
+ /// details on the parameterisation of the Skein hash function.
+ /// </summary>
+ /// <param name="parameters">the parameters to apply to this engine, or <code>null</code> to use no parameters.</param>
+ public void Init(SkeinParameters parameters)
+ {
+ this.chain = null;
+ this.key = null;
+ this.preMessageParameters = null;
+ this.postMessageParameters = null;
+
+ if (parameters != null)
+ {
+ byte[] key = parameters.GetKey();
+ if (key.Length < 16)
+ {
+ throw new ArgumentException("Skein key must be at least 128 bits.");
+ }
+ InitParams(parameters.GetParameters());
+ }
+ CreateInitialState();
+
+ // Initialise message block
+ UbiInit(PARAM_TYPE_MESSAGE);
+ }
+
+ private void InitParams(IDictionary parameters)
+ {
+ IEnumerator keys = parameters.Keys.GetEnumerator();
+ IList pre = Platform.CreateArrayList();
+ IList post = Platform.CreateArrayList();
+
+ while (keys.MoveNext())
+ {
+ int type = (int)keys.Current;
+ byte[] value = (byte[])parameters[type];
+
+ if (type == PARAM_TYPE_KEY)
+ {
+ this.key = value;
+ }
+ else if (type < PARAM_TYPE_MESSAGE)
+ {
+ pre.Add(new Parameter(type, value));
+ }
+ else
+ {
+ post.Add(new Parameter(type, value));
+ }
+ }
+ preMessageParameters = new Parameter[pre.Count];
+ pre.CopyTo(preMessageParameters, 0);
+ Array.Sort(preMessageParameters);
+
+ postMessageParameters = new Parameter[post.Count];
+ post.CopyTo(postMessageParameters, 0);
+ Array.Sort(postMessageParameters);
+ }
+
+ /**
+ * Calculate the initial (pre message block) chaining state.
+ */
+ private void CreateInitialState()
+ {
+ ulong[] precalc = (ulong[])INITIAL_STATES[VariantIdentifier(BlockSize, OutputSize)];
+ if ((key == null) && (precalc != null))
+ {
+ // Precalculated UBI(CFG)
+ chain = Arrays.Clone(precalc);
+ }
+ else
+ {
+ // Blank initial state
+ chain = new ulong[BlockSize / 8];
+
+ // Process key block
+ if (key != null)
+ {
+ UbiComplete(SkeinParameters.PARAM_TYPE_KEY, key);
+ }
+
+ // Process configuration block
+ UbiComplete(PARAM_TYPE_CONFIG, new Configuration(outputSizeBytes * 8).Bytes);
+ }
+
+ // Process additional pre-message parameters
+ if (preMessageParameters != null)
+ {
+ for (int i = 0; i < preMessageParameters.Length; i++)
+ {
+ Parameter param = preMessageParameters[i];
+ UbiComplete(param.Type, param.Value);
+ }
+ }
+ initialState = Arrays.Clone(chain);
+ }
+
+ /// <summary>
+ /// Reset the engine to the initial state (with the key and any pre-message parameters , ready to
+ /// accept message input.
+ /// </summary>
+ public void Reset()
+ {
+ Array.Copy(initialState, 0, chain, 0, chain.Length);
+
+ UbiInit(PARAM_TYPE_MESSAGE);
+ }
+
+ private void UbiComplete(int type, byte[] value)
+ {
+ UbiInit(type);
+ this.ubi.Update(value, 0, value.Length, chain);
+ UbiFinal();
+ }
+
+ private void UbiInit(int type)
+ {
+ this.ubi.Reset(type);
+ }
+
+ private void UbiFinal()
+ {
+ ubi.DoFinal(chain);
+ }
+
+ private void CheckInitialised()
+ {
+ if (this.ubi == null)
+ {
+ throw new ArgumentException("Skein engine is not initialised.");
+ }
+ }
+
+ public void Update(byte inByte)
+ {
+ singleByte[0] = inByte;
+ Update(singleByte, 0, 1);
+ }
+
+ public void Update(byte[] inBytes, int inOff, int len)
+ {
+ CheckInitialised();
+ ubi.Update(inBytes, inOff, len, chain);
+ }
+
+ public int DoFinal(byte[] outBytes, int outOff)
+ {
+ CheckInitialised();
+ if (outBytes.Length < (outOff + outputSizeBytes))
+ {
+ throw new DataLengthException("Output buffer is too short to hold output of " + outputSizeBytes + " bytes");
+ }
+
+ // Finalise message block
+ UbiFinal();
+
+ // Process additional post-message parameters
+ if (postMessageParameters != null)
+ {
+ for (int i = 0; i < postMessageParameters.Length; i++)
+ {
+ Parameter param = postMessageParameters[i];
+ UbiComplete(param.Type, param.Value);
+ }
+ }
+
+ // Perform the output transform
+ int blockSize = BlockSize;
+ int blocksRequired = ((outputSizeBytes + blockSize - 1) / blockSize);
+ for (int i = 0; i < blocksRequired; i++)
+ {
+ int toWrite = System.Math.Min(blockSize, outputSizeBytes - (i * blockSize));
+ Output((ulong)i, outBytes, outOff + (i * blockSize), toWrite);
+ }
+
+ Reset();
+
+ return outputSizeBytes;
+ }
+
+ private void Output(ulong outputSequence, byte[] outBytes, int outOff, int outputBytes)
+ {
+ byte[] currentBytes = new byte[8];
+ ThreefishEngine.WordToBytes(outputSequence, currentBytes, 0);
+
+ // Output is a sequence of UBI invocations all of which use and preserve the pre-output
+ // state
+ ulong[] outputWords = new ulong[chain.Length];
+ UbiInit(PARAM_TYPE_OUTPUT);
+ this.ubi.Update(currentBytes, 0, currentBytes.Length, outputWords);
+ ubi.DoFinal(outputWords);
+
+ int wordsRequired = ((outputBytes + 8 - 1) / 8);
+ for (int i = 0; i < wordsRequired; i++)
+ {
+ int toWrite = System.Math.Min(8, outputBytes - (i * 8));
+ if (toWrite == 8)
+ {
+ ThreefishEngine.WordToBytes(outputWords[i], outBytes, outOff + (i * 8));
+ }
+ else
+ {
+ ThreefishEngine.WordToBytes(outputWords[i], currentBytes, 0);
+ Array.Copy(currentBytes, 0, outBytes, outOff + (i * 8), toWrite);
+ }
+ }
+ }
+
+ }
}
diff --git a/crypto/src/crypto/engines/ThreefishEngine.cs b/crypto/src/crypto/engines/ThreefishEngine.cs
index 3d4ee8835..954470345 100644
--- a/crypto/src/crypto/engines/ThreefishEngine.cs
+++ b/crypto/src/crypto/engines/ThreefishEngine.cs
@@ -6,7 +6,6 @@ using Org.BouncyCastle.Utilities.Encoders;
namespace Org.BouncyCastle.Crypto.Engines
{
-
/// <summary>
/// Implementation of the Threefish tweakable large block cipher in 256, 512 and 1024 bit block
/// sizes.
@@ -19,7 +18,7 @@ namespace Org.BouncyCastle.Crypto.Engines
/// Bellare - Tadayoshi Kohno - Jon Callas - Jesse Walker.
/// <p/>
/// This implementation inlines all round functions, unrolls 8 rounds, and uses 1.2k of static tables
- /// to speed up key schedule injection. <br>
+ /// to speed up key schedule injection. <br/>
/// 2 x block size state is retained by each cipher instance.
/// </remarks>
public class ThreefishEngine
diff --git a/crypto/src/crypto/parameters/SkeinParameters.cs b/crypto/src/crypto/parameters/SkeinParameters.cs
index bbd25e0e0..a4e3e8e2a 100644
--- a/crypto/src/crypto/parameters/SkeinParameters.cs
+++ b/crypto/src/crypto/parameters/SkeinParameters.cs
@@ -14,7 +14,7 @@ namespace Org.BouncyCastle.Crypto.Parameters
/// Parameterised Skein can be used for:
/// <ul>
/// <li>MAC generation, by providing a <see cref="SkeinParameters.Builder.SetKey(byte[])">key</see>.</li>
- /// <li>Randomised hashing, by providing a <see cref="SkeinParameters.Builder.SetNoce(byte[])">nonce</see>.</li>
+ /// <li>Randomised hashing, by providing a <see cref="SkeinParameters.Builder.SetNonce(byte[])">nonce</see>.</li>
/// <li>A hash function for digital signatures, associating a
/// <see cref="SkeinParameters.Builder.SetPublicKey(byte[])">public key</see> with the message digest.</li>
/// <li>A key derivation function, by providing a
@@ -120,7 +120,7 @@ namespace Org.BouncyCastle.Crypto.Parameters
}
/// <summary>
- /// Obtains the value of the <see cref="PARAM_TYPE_KEY_IDENTIFIER key identifier parameter</see>, or
+ /// Obtains the value of the <see cref="PARAM_TYPE_KEY_IDENTIFIER">key identifier parameter</see>, or
/// <code>null</code> if not set.
/// </summary>
public byte[] GetKeyIdentifier()
@@ -129,7 +129,7 @@ namespace Org.BouncyCastle.Crypto.Parameters
}
/// <summary>
- /// Obtains the value of the <see cref="PARAM_TYPE_NONCE nonce parameter</see>, or <code>null</code> if
+ /// Obtains the value of the <see cref="PARAM_TYPE_NONCE">nonce parameter</see>, or <code>null</code> if
/// not set.
/// </summary>
public byte[] GetNonce()
diff --git a/crypto/src/math/ec/ECCurve.cs b/crypto/src/math/ec/ECCurve.cs
index 0c150848a..82cf1367b 100644
--- a/crypto/src/math/ec/ECCurve.cs
+++ b/crypto/src/math/ec/ECCurve.cs
@@ -340,7 +340,7 @@ namespace Org.BouncyCastle.Math.EC
BigInteger X1 = new BigInteger(1, encoded, 1, expectedLength);
BigInteger Y1 = new BigInteger(1, encoded, 1 + expectedLength, expectedLength);
- p = CreatePoint(X1, Y1, false);
+ p = CreatePoint(X1, Y1);
break;
}
@@ -777,6 +777,7 @@ namespace Org.BouncyCastle.Math.EC
return new F2mFieldElement(this.m, this.k1, this.k2, this.k3, x);
}
+ [Obsolete("Per-point compression property will be removed")]
public override ECPoint CreatePoint(BigInteger x, BigInteger y, bool withCompression)
{
ECFieldElement X = FromBigInteger(x), Y = FromBigInteger(y);
diff --git a/crypto/src/math/ec/abc/Tnaf.cs b/crypto/src/math/ec/abc/Tnaf.cs
index 0ba414e68..9f16886f5 100644
--- a/crypto/src/math/ec/abc/Tnaf.cs
+++ b/crypto/src/math/ec/abc/Tnaf.cs
@@ -534,7 +534,7 @@ namespace Org.BouncyCastle.Math.EC.Abc
int m = curve.M;
int a = curve.A.ToBigInteger().IntValue;
sbyte mu = curve.GetMu();
- int h = curve.H.IntValue;
+ int h = curve.Cofactor.IntValue;
int index = m + 3 - a;
BigInteger[] ui = GetLucas(mu, index, false);
diff --git a/crypto/src/security/PublicKeyFactory.cs b/crypto/src/security/PublicKeyFactory.cs
index b0fc98b03..8c0be4f70 100644
--- a/crypto/src/security/PublicKeyFactory.cs
+++ b/crypto/src/security/PublicKeyFactory.cs
@@ -187,7 +187,7 @@ namespace Org.BouncyCastle.Security
if (ecP == null)
return null;
- ECPoint q = ecP.Curve.CreatePoint(new BigInteger(1, x), new BigInteger(1, y), false);
+ ECPoint q = ecP.Curve.CreatePoint(new BigInteger(1, x), new BigInteger(1, y));
return new ECPublicKeyParameters("ECGOST3410", q, gostParams.PublicKeyParamSet);
}
diff --git a/crypto/src/util/IMemoable.cs b/crypto/src/util/IMemoable.cs
index befc10fbf..cc8a2e55b 100644
--- a/crypto/src/util/IMemoable.cs
+++ b/crypto/src/util/IMemoable.cs
@@ -20,7 +20,7 @@ namespace Org.BouncyCastle.Utilities
/// Implementations of this method <em>should</em> try to avoid or minimise memory allocation to perform the reset.
/// </remarks>
/// <param name="other">an object originally {@link #copy() copied} from an object of the same type as this instance.</param>
- /// <exception cref="ClassCastException">if the provided object is not of the correct type.</exception>
+ /// <exception cref="InvalidCastException">if the provided object is not of the correct type.</exception>
/// <exception cref="MemoableResetException">if the <b>other</b> parameter is in some other way invalid.</exception>
void Reset(IMemoable other);
}
diff --git a/crypto/src/util/MemoableResetException.cs b/crypto/src/util/MemoableResetException.cs
index d9542dab2..99554f6c2 100644
--- a/crypto/src/util/MemoableResetException.cs
+++ b/crypto/src/util/MemoableResetException.cs
@@ -2,26 +2,26 @@ using System;
namespace Org.BouncyCastle.Utilities
{
- /**
- * Exception to be thrown on a failure to reset an object implementing Memoable.
- * <p>
- * The exception extends ClassCastException to enable users to have a single handling case,
- * only introducing specific handling of this one if required.
- * </p>
- */
- public class MemoableResetException
- : InvalidCastException
- {
- /**
- * Basic Constructor.
- *
- * @param msg message to be associated with this exception.
- */
- public MemoableResetException(string msg)
- : base(msg)
- {
- }
- }
+ /**
+ * Exception to be thrown on a failure to reset an object implementing Memoable.
+ * <p>
+ * The exception extends InvalidCastException to enable users to have a single handling case,
+ * only introducing specific handling of this one if required.
+ * </p>
+ */
+ public class MemoableResetException
+ : InvalidCastException
+ {
+ /**
+ * Basic Constructor.
+ *
+ * @param msg message to be associated with this exception.
+ */
+ public MemoableResetException(string msg)
+ : base(msg)
+ {
+ }
+ }
}
|
