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Devin Jankowski
2023-06-21 12:46:23 -04:00
commit c70248a520
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240
iTechSharp/srcbc/crypto/macs/CMac.cs Normal file
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using System;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Paddings;
namespace Org.BouncyCastle.Crypto.Macs
{
/**
* CMAC - as specified at www.nuee.nagoya-u.ac.jp/labs/tiwata/omac/omac.html
* <p>
* CMAC is analogous to OMAC1 - see also en.wikipedia.org/wiki/CMAC
* </p><p>
* CMAC is a NIST recomendation - see
* csrc.nist.gov/CryptoToolkit/modes/800-38_Series_Publications/SP800-38B.pdf
* </p><p>
* CMAC/OMAC1 is a blockcipher-based message authentication code designed and
* analyzed by Tetsu Iwata and Kaoru Kurosawa.
* </p><p>
* CMAC/OMAC1 is a simple variant of the CBC MAC (Cipher Block Chaining Message
* Authentication Code). OMAC stands for One-Key CBC MAC.
* </p><p>
* It supports 128- or 64-bits block ciphers, with any key size, and returns
* a MAC with dimension less or equal to the block size of the underlying
* cipher.
* </p>
*/
public class CMac
: IMac
{
private const byte CONSTANT_128 = (byte)0x87;
private const byte CONSTANT_64 = (byte)0x1b;
private byte[] ZEROES;
private byte[] mac;
private byte[] buf;
private int bufOff;
private IBlockCipher cipher;
private int macSize;
private byte[] L, Lu, Lu2;
/**
* create a standard MAC based on a CBC block cipher (64 or 128 bit block).
* This will produce an authentication code the length of the block size
* of the cipher.
*
* @param cipher the cipher to be used as the basis of the MAC generation.
*/
public CMac(
IBlockCipher cipher)
: this(cipher, cipher.GetBlockSize() * 8)
{
}
/**
* create a standard MAC based on a block cipher with the size of the
* MAC been given in bits.
* <p/>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
*
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8 and @lt;= 128.
*/
public CMac(
IBlockCipher cipher,
int macSizeInBits)
{
if ((macSizeInBits % 8) != 0)
throw new ArgumentException("MAC size must be multiple of 8");
if (macSizeInBits > (cipher.GetBlockSize() * 8))
{
throw new ArgumentException(
"MAC size must be less or equal to "
+ (cipher.GetBlockSize() * 8));
}
if (cipher.GetBlockSize() != 8 && cipher.GetBlockSize() != 16)
{
throw new ArgumentException(
"Block size must be either 64 or 128 bits");
}
this.cipher = new CbcBlockCipher(cipher);
this.macSize = macSizeInBits / 8;
mac = new byte[cipher.GetBlockSize()];
buf = new byte[cipher.GetBlockSize()];
ZEROES = new byte[cipher.GetBlockSize()];
bufOff = 0;
}
public string AlgorithmName
{
get { return cipher.AlgorithmName; }
}
private byte[] doubleLu(
byte[] inBytes)
{
int FirstBit = (inBytes[0] & 0xFF) >> 7;
byte[] ret = new byte[inBytes.Length];
for (int i = 0; i < inBytes.Length - 1; i++)
{
ret[i] = (byte)((inBytes[i] << 1) + ((inBytes[i + 1] & 0xFF) >> 7));
}
ret[inBytes.Length - 1] = (byte)(inBytes[inBytes.Length - 1] << 1);
if (FirstBit == 1)
{
ret[inBytes.Length - 1] ^= inBytes.Length == 16 ? CONSTANT_128 : CONSTANT_64;
}
return ret;
}
public void Init(
ICipherParameters parameters)
{
Reset();
cipher.Init(true, parameters);
//initializes the L, Lu, Lu2 numbers
L = new byte[ZEROES.Length];
cipher.ProcessBlock(ZEROES, 0, L, 0);
Lu = doubleLu(L);
Lu2 = doubleLu(Lu);
cipher.Init(true, parameters);
}
public int GetMacSize()
{
return macSize;
}
public void Update(
byte input)
{
if (bufOff == buf.Length)
{
cipher.ProcessBlock(buf, 0, mac, 0);
bufOff = 0;
}
buf[bufOff++] = input;
}
public void BlockUpdate(
byte[] inBytes,
int inOff,
int len)
{
if (len < 0)
throw new ArgumentException("Can't have a negative input length!");
int blockSize = cipher.GetBlockSize();
int gapLen = blockSize - bufOff;
if (len > gapLen)
{
Array.Copy(inBytes, inOff, buf, bufOff, gapLen);
cipher.ProcessBlock(buf, 0, mac, 0);
bufOff = 0;
len -= gapLen;
inOff += gapLen;
while (len > blockSize)
{
cipher.ProcessBlock(inBytes, inOff, mac, 0);
len -= blockSize;
inOff += blockSize;
}
}
Array.Copy(inBytes, inOff, buf, bufOff, len);
bufOff += len;
}
public int DoFinal(
byte[] outBytes,
int outOff)
{
int blockSize = cipher.GetBlockSize();
byte[] lu;
if (bufOff == blockSize)
{
lu = Lu;
}
else
{
new ISO7816d4Padding().AddPadding(buf, bufOff);
lu = Lu2;
}
for (int i = 0; i < mac.Length; i++)
{
buf[i] ^= lu[i];
}
cipher.ProcessBlock(buf, 0, mac, 0);
Array.Copy(mac, 0, outBytes, outOff, macSize);
Reset();
return macSize;
}
/**
* Reset the mac generator.
*/
public void Reset()
{
/*
* clean the buffer.
*/
Array.Clear(buf, 0, buf.Length);
bufOff = 0;
/*
* Reset the underlying cipher.
*/
cipher.Reset();
}
}
}

213
iTechSharp/srcbc/crypto/macs/CbcBlockCipherMac.cs Normal file
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using System;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Paddings;
namespace Org.BouncyCastle.Crypto.Macs
{
/**
* standard CBC Block Cipher MAC - if no padding is specified the default of
* pad of zeroes is used.
*/
public class CbcBlockCipherMac
: IMac
{
private byte[] mac;
private byte[] Buffer;
private int bufOff;
private IBlockCipher cipher;
private IBlockCipherPadding padding;
private int macSize;
/**
* create a standard MAC based on a CBC block cipher. This will produce an
* authentication code half the length of the block size of the cipher.
*
* @param cipher the cipher to be used as the basis of the MAC generation.
*/
public CbcBlockCipherMac(
IBlockCipher cipher)
: this(cipher, (cipher.GetBlockSize() * 8) / 2, null)
{
}
/**
* create a standard MAC based on a CBC block cipher. This will produce an
* authentication code half the length of the block size of the cipher.
*
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param padding the padding to be used to complete the last block.
*/
public CbcBlockCipherMac(
IBlockCipher cipher,
IBlockCipherPadding padding)
: this(cipher, (cipher.GetBlockSize() * 8) / 2, padding)
{
}
/**
* create a standard MAC based on a block cipher with the size of the
* MAC been given in bits. This class uses CBC mode as the basis for the
* MAC generation.
* <p>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
* </p>
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8.
*/
public CbcBlockCipherMac(
IBlockCipher cipher,
int macSizeInBits)
: this(cipher, macSizeInBits, null)
{
}
/**
* create a standard MAC based on a block cipher with the size of the
* MAC been given in bits. This class uses CBC mode as the basis for the
* MAC generation.
* <p>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
* </p>
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8.
* @param padding the padding to be used to complete the last block.
*/
public CbcBlockCipherMac(
IBlockCipher cipher,
int macSizeInBits,
IBlockCipherPadding padding)
{
if ((macSizeInBits % 8) != 0)
throw new ArgumentException("MAC size must be multiple of 8");
this.cipher = new CbcBlockCipher(cipher);
this.padding = padding;
this.macSize = macSizeInBits / 8;
mac = new byte[cipher.GetBlockSize()];
Buffer = new byte[cipher.GetBlockSize()];
bufOff = 0;
}
public string AlgorithmName
{
get { return cipher.AlgorithmName; }
}
public void Init(
ICipherParameters parameters)
{
Reset();
cipher.Init(true, parameters);
}
public int GetMacSize()
{
return macSize;
}
public void Update(
byte input)
{
if (bufOff == Buffer.Length)
{
cipher.ProcessBlock(Buffer, 0, mac, 0);
bufOff = 0;
}
Buffer[bufOff++] = input;
}
public void BlockUpdate(
byte[] input,
int inOff,
int len)
{
if (len < 0)
throw new ArgumentException("Can't have a negative input length!");
int blockSize = cipher.GetBlockSize();
int resultLen = 0;
int gapLen = blockSize - bufOff;
if (len > gapLen)
{
Array.Copy(input, inOff, Buffer, bufOff, gapLen);
resultLen += cipher.ProcessBlock(Buffer, 0, mac, 0);
bufOff = 0;
len -= gapLen;
inOff += gapLen;
while (len > blockSize)
{
resultLen += cipher.ProcessBlock(input, inOff, mac, 0);
len -= blockSize;
inOff += blockSize;
}
}
Array.Copy(input, inOff, Buffer, bufOff, len);
bufOff += len;
}
public int DoFinal(
byte[] output,
int outOff)
{
int blockSize = cipher.GetBlockSize();
if (padding == null)
{
// pad with zeroes
while (bufOff < blockSize)
{
Buffer[bufOff++] = 0;
}
}
else
{
if (bufOff == blockSize)
{
cipher.ProcessBlock(Buffer, 0, mac, 0);
bufOff = 0;
}
padding.AddPadding(Buffer, bufOff);
}
cipher.ProcessBlock(Buffer, 0, mac, 0);
Array.Copy(mac, 0, output, outOff, macSize);
Reset();
return macSize;
}
/**
* Reset the mac generator.
*/
public void Reset()
{
// Clear the buffer.
Array.Clear(Buffer, 0, Buffer.Length);
bufOff = 0;
// Reset the underlying cipher.
cipher.Reset();
}
}
}

368
iTechSharp/srcbc/crypto/macs/CfbBlockCipherMac.cs Normal file
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using System;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Paddings;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Crypto.Macs
{
/**
* implements a Cipher-FeedBack (CFB) mode on top of a simple cipher.
*/
class MacCFBBlockCipher
: IBlockCipher
{
private byte[] IV;
private byte[] cfbV;
private byte[] cfbOutV;
private readonly int blockSize;
private readonly IBlockCipher cipher;
/**
* Basic constructor.
*
* @param cipher the block cipher to be used as the basis of the
* feedback mode.
* @param blockSize the block size in bits (note: a multiple of 8)
*/
public MacCFBBlockCipher(
IBlockCipher cipher,
int bitBlockSize)
{
this.cipher = cipher;
this.blockSize = bitBlockSize / 8;
this.IV = new byte[cipher.GetBlockSize()];
this.cfbV = new byte[cipher.GetBlockSize()];
this.cfbOutV = new byte[cipher.GetBlockSize()];
}
/**
* Initialise the cipher and, possibly, the initialisation vector (IV).
* If an IV isn't passed as part of the parameter, the IV will be all zeros.
* An IV which is too short is handled in FIPS compliant fashion.
*
* @param param the key and other data required by the cipher.
* @exception ArgumentException if the parameters argument is
* inappropriate.
*/
public void Init(
bool forEncryption,
ICipherParameters parameters)
{
if (parameters is ParametersWithIV)
{
ParametersWithIV ivParam = (ParametersWithIV)parameters;
byte[] iv = ivParam.GetIV();
if (iv.Length < IV.Length)
{
Array.Copy(iv, 0, IV, IV.Length - iv.Length, iv.Length);
}
else
{
Array.Copy(iv, 0, IV, 0, IV.Length);
}
parameters = ivParam.Parameters;
}
Reset();
cipher.Init(true, parameters);
}
/**
* return the algorithm name and mode.
*
* @return the name of the underlying algorithm followed by "/CFB"
* and the block size in bits.
*/
public string AlgorithmName
{
get { return cipher.AlgorithmName + "/CFB" + (blockSize * 8); }
}
public bool IsPartialBlockOkay
{
get { return true; }
}
/**
* return the block size we are operating at.
*
* @return the block size we are operating at (in bytes).
*/
public int GetBlockSize()
{
return blockSize;
}
/**
* Process one block of input from the array in and write it to
* the out array.
*
* @param in the array containing the input data.
* @param inOff offset into the in array the data starts at.
* @param out the array the output data will be copied into.
* @param outOff the offset into the out array the output will start at.
* @exception DataLengthException if there isn't enough data in in, or
* space in out.
* @exception InvalidOperationException if the cipher isn't initialised.
* @return the number of bytes processed and produced.
*/
public int ProcessBlock(
byte[] input,
int inOff,
byte[] outBytes,
int outOff)
{
if ((inOff + blockSize) > input.Length)
throw new DataLengthException("input buffer too short");
if ((outOff + blockSize) > outBytes.Length)
throw new DataLengthException("output buffer too short");
cipher.ProcessBlock(cfbV, 0, cfbOutV, 0);
//
// XOR the cfbV with the plaintext producing the cipher text
//
for (int i = 0; i < blockSize; i++)
{
outBytes[outOff + i] = (byte)(cfbOutV[i] ^ input[inOff + i]);
}
//
// change over the input block.
//
Array.Copy(cfbV, blockSize, cfbV, 0, cfbV.Length - blockSize);
Array.Copy(outBytes, outOff, cfbV, cfbV.Length - blockSize, blockSize);
return blockSize;
}
/**
* reset the chaining vector back to the IV and reset the underlying
* cipher.
*/
public void Reset()
{
IV.CopyTo(cfbV, 0);
cipher.Reset();
}
public void GetMacBlock(
byte[] mac)
{
cipher.ProcessBlock(cfbV, 0, mac, 0);
}
}
public class CfbBlockCipherMac
: IMac
{
private byte[] mac;
private byte[] Buffer;
private int bufOff;
private MacCFBBlockCipher cipher;
private IBlockCipherPadding padding;
private int macSize;
/**
* create a standard MAC based on a CFB block cipher. This will produce an
* authentication code half the length of the block size of the cipher, with
* the CFB mode set to 8 bits.
*
* @param cipher the cipher to be used as the basis of the MAC generation.
*/
public CfbBlockCipherMac(
IBlockCipher cipher)
: this(cipher, 8, (cipher.GetBlockSize() * 8) / 2, null)
{
}
/**
* create a standard MAC based on a CFB block cipher. This will produce an
* authentication code half the length of the block size of the cipher, with
* the CFB mode set to 8 bits.
*
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param padding the padding to be used.
*/
public CfbBlockCipherMac(
IBlockCipher cipher,
IBlockCipherPadding padding)
: this(cipher, 8, (cipher.GetBlockSize() * 8) / 2, padding)
{
}
/**
* create a standard MAC based on a block cipher with the size of the
* MAC been given in bits. This class uses CFB mode as the basis for the
* MAC generation.
* <p>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
* </p>
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param cfbBitSize the size of an output block produced by the CFB mode.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8.
*/
public CfbBlockCipherMac(
IBlockCipher cipher,
int cfbBitSize,
int macSizeInBits)
: this(cipher, cfbBitSize, macSizeInBits, null)
{
}
/**
* create a standard MAC based on a block cipher with the size of the
* MAC been given in bits. This class uses CFB mode as the basis for the
* MAC generation.
* <p>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
* </p>
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param cfbBitSize the size of an output block produced by the CFB mode.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8.
* @param padding a padding to be used.
*/
public CfbBlockCipherMac(
IBlockCipher cipher,
int cfbBitSize,
int macSizeInBits,
IBlockCipherPadding padding)
{
if ((macSizeInBits % 8) != 0)
throw new ArgumentException("MAC size must be multiple of 8");
mac = new byte[cipher.GetBlockSize()];
this.cipher = new MacCFBBlockCipher(cipher, cfbBitSize);
this.padding = padding;
this.macSize = macSizeInBits / 8;
Buffer = new byte[this.cipher.GetBlockSize()];
bufOff = 0;
}
public string AlgorithmName
{
get { return cipher.AlgorithmName; }
}
public void Init(
ICipherParameters parameters)
{
Reset();
cipher.Init(true, parameters);
}
public int GetMacSize()
{
return macSize;
}
public void Update(
byte input)
{
if (bufOff == Buffer.Length)
{
cipher.ProcessBlock(Buffer, 0, mac, 0);
bufOff = 0;
}
Buffer[bufOff++] = input;
}
public void BlockUpdate(
byte[] input,
int inOff,
int len)
{
if (len < 0)
throw new ArgumentException("Can't have a negative input length!");
int blockSize = cipher.GetBlockSize();
int resultLen = 0;
int gapLen = blockSize - bufOff;
if (len > gapLen)
{
Array.Copy(input, inOff, Buffer, bufOff, gapLen);
resultLen += cipher.ProcessBlock(Buffer, 0, mac, 0);
bufOff = 0;
len -= gapLen;
inOff += gapLen;
while (len > blockSize)
{
resultLen += cipher.ProcessBlock(input, inOff, mac, 0);
len -= blockSize;
inOff += blockSize;
}
}
Array.Copy(input, inOff, Buffer, bufOff, len);
bufOff += len;
}
public int DoFinal(
byte[] output,
int outOff)
{
int blockSize = cipher.GetBlockSize();
// pad with zeroes
if (this.padding == null)
{
while (bufOff < blockSize)
{
Buffer[bufOff++] = 0;
}
}
else
{
padding.AddPadding(Buffer, bufOff);
}
cipher.ProcessBlock(Buffer, 0, mac, 0);
cipher.GetMacBlock(mac);
Array.Copy(mac, 0, output, outOff, macSize);
Reset();
return macSize;
}
/**
* Reset the mac generator.
*/
public void Reset()
{
// Clear the buffer.
Array.Clear(Buffer, 0, Buffer.Length);
bufOff = 0;
// Reset the underlying cipher.
cipher.Reset();
}
}
}

296
iTechSharp/srcbc/crypto/macs/GOST28147Mac.cs Normal file
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using System;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Crypto.Macs
{
/**
* implementation of GOST 28147-89 MAC
*/
public class Gost28147Mac : IMac
{
private const int blockSize = 8;
private const int macSize = 4;
private int bufOff;
private byte[] buf;
private byte[] mac;
private bool firstStep = true;
private int[] workingKey;
//
// This is default S-box - E_A.
private byte[] S =
{
0x9,0x6,0x3,0x2,0x8,0xB,0x1,0x7,0xA,0x4,0xE,0xF,0xC,0x0,0xD,0x5,
0x3,0x7,0xE,0x9,0x8,0xA,0xF,0x0,0x5,0x2,0x6,0xC,0xB,0x4,0xD,0x1,
0xE,0x4,0x6,0x2,0xB,0x3,0xD,0x8,0xC,0xF,0x5,0xA,0x0,0x7,0x1,0x9,
0xE,0x7,0xA,0xC,0xD,0x1,0x3,0x9,0x0,0x2,0xB,0x4,0xF,0x8,0x5,0x6,
0xB,0x5,0x1,0x9,0x8,0xD,0xF,0x0,0xE,0x4,0x2,0x3,0xC,0x7,0xA,0x6,
0x3,0xA,0xD,0xC,0x1,0x2,0x0,0xB,0x7,0x5,0x9,0x4,0x8,0xF,0xE,0x6,
0x1,0xD,0x2,0x9,0x7,0xA,0x6,0x0,0x8,0xC,0x4,0x5,0xF,0x3,0xB,0xE,
0xB,0xA,0xF,0x5,0x0,0xC,0xE,0x8,0x6,0x2,0x3,0x9,0x1,0x7,0xD,0x4
};
public Gost28147Mac()
{
mac = new byte[blockSize];
buf = new byte[blockSize];
bufOff = 0;
}
private static int[] generateWorkingKey(
byte[] userKey)
{
if (userKey.Length != 32)
throw new ArgumentException("Key length invalid. Key needs to be 32 byte - 256 bit!!!");
int[] key = new int[8];
for(int i=0; i!=8; i++)
{
key[i] = bytesToint(userKey,i*4);
}
return key;
}
public void Init(
ICipherParameters parameters)
{
Reset();
buf = new byte[blockSize];
if (parameters is ParametersWithSBox)
{
ParametersWithSBox param = (ParametersWithSBox)parameters;
//
// Set the S-Box
//
param.GetSBox().CopyTo(this.S, 0);
//
// set key if there is one
//
if (param.Parameters != null)
{
workingKey = generateWorkingKey(((KeyParameter)param.Parameters).GetKey());
}
}
else if (parameters is KeyParameter)
{
workingKey = generateWorkingKey(((KeyParameter)parameters).GetKey());
}
else
{
throw new ArgumentException("invalid parameter passed to Gost28147 init - "
+ parameters.GetType().Name);
}
}
public string AlgorithmName
{
get { return "Gost28147Mac"; }
}
public int GetMacSize()
{
return macSize;
}
private int gost28147_mainStep(int n1, int key)
{
int cm = (key + n1); // CM1
// S-box replacing
int om = S[ 0 + ((cm >> (0 * 4)) & 0xF)] << (0 * 4);
om += S[ 16 + ((cm >> (1 * 4)) & 0xF)] << (1 * 4);
om += S[ 32 + ((cm >> (2 * 4)) & 0xF)] << (2 * 4);
om += S[ 48 + ((cm >> (3 * 4)) & 0xF)] << (3 * 4);
om += S[ 64 + ((cm >> (4 * 4)) & 0xF)] << (4 * 4);
om += S[ 80 + ((cm >> (5 * 4)) & 0xF)] << (5 * 4);
om += S[ 96 + ((cm >> (6 * 4)) & 0xF)] << (6 * 4);
om += S[112 + ((cm >> (7 * 4)) & 0xF)] << (7 * 4);
// return om << 11 | om >>> (32-11); // 11-leftshift
int omLeft = om << 11;
int omRight = (int)(((uint) om) >> (32 - 11)); // Note: Casts required to get unsigned bit rotation
return omLeft | omRight;
}
private void gost28147MacFunc(
int[] workingKey,
byte[] input,
int inOff,
byte[] output,
int outOff)
{
int N1, N2, tmp; //tmp -> for saving N1
N1 = bytesToint(input, inOff);
N2 = bytesToint(input, inOff + 4);
for (int k = 0; k < 2; k++) // 1-16 steps
{
for (int j = 0; j < 8; j++)
{
tmp = N1;
N1 = N2 ^ gost28147_mainStep(N1, workingKey[j]); // CM2
N2 = tmp;
}
}
intTobytes(N1, output, outOff);
intTobytes(N2, output, outOff + 4);
}
//array of bytes to type int
private static int bytesToint(
byte[] input,
int inOff)
{
return (int)((input[inOff + 3] << 24) & 0xff000000) + ((input[inOff + 2] << 16) & 0xff0000)
+ ((input[inOff + 1] << 8) & 0xff00) + (input[inOff] & 0xff);
}
//int to array of bytes
private static void intTobytes(
int num,
byte[] output,
int outOff)
{
output[outOff + 3] = (byte)(num >> 24);
output[outOff + 2] = (byte)(num >> 16);
output[outOff + 1] = (byte)(num >> 8);
output[outOff] = (byte)num;
}
private static byte[] CM5func(
byte[] buf,
int bufOff,
byte[] mac)
{
byte[] sum = new byte[buf.Length - bufOff];
Array.Copy(buf, bufOff, sum, 0, mac.Length);
for (int i = 0; i != mac.Length; i++)
{
sum[i] = (byte)(sum[i] ^ mac[i]);
}
return sum;
}
public void Update(
byte input)
{
if (bufOff == buf.Length)
{
byte[] sumbuf = new byte[buf.Length];
Array.Copy(buf, 0, sumbuf, 0, mac.Length);
if (firstStep)
{
firstStep = false;
}
else
{
sumbuf = CM5func(buf, 0, mac);
}
gost28147MacFunc(workingKey, sumbuf, 0, mac, 0);
bufOff = 0;
}
buf[bufOff++] = input;
}
public void BlockUpdate(
byte[] input,
int inOff,
int len)
{
if (len < 0)
throw new ArgumentException("Can't have a negative input length!");
int gapLen = blockSize - bufOff;
if (len > gapLen)
{
Array.Copy(input, inOff, buf, bufOff, gapLen);
byte[] sumbuf = new byte[buf.Length];
Array.Copy(buf, 0, sumbuf, 0, mac.Length);
if (firstStep)
{
firstStep = false;
}
else
{
sumbuf = CM5func(buf, 0, mac);
}
gost28147MacFunc(workingKey, sumbuf, 0, mac, 0);
bufOff = 0;
len -= gapLen;
inOff += gapLen;
while (len > blockSize)
{
sumbuf = CM5func(input, inOff, mac);
gost28147MacFunc(workingKey, sumbuf, 0, mac, 0);
len -= blockSize;
inOff += blockSize;
}
}
Array.Copy(input, inOff, buf, bufOff, len);
bufOff += len;
}
public int DoFinal(
byte[] output,
int outOff)
{
//padding with zero
while (bufOff < blockSize)
{
buf[bufOff++] = 0;
}
byte[] sumbuf = new byte[buf.Length];
Array.Copy(buf, 0, sumbuf, 0, mac.Length);
if (firstStep)
{
firstStep = false;
}
else
{
sumbuf = CM5func(buf, 0, mac);
}
gost28147MacFunc(workingKey, sumbuf, 0, mac, 0);
Array.Copy(mac, (mac.Length/2)-macSize, output, outOff, macSize);
Reset();
return macSize;
}
public void Reset()
{
// Clear the buffer.
Array.Clear(buf, 0, buf.Length);
bufOff = 0;
firstStep = true;
}
}
}

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iTechSharp/srcbc/crypto/macs/HMac.cs Normal file
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using System;
using System.Collections;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Crypto.Macs
{
/**
* HMAC implementation based on RFC2104
*
* H(K XOR opad, H(K XOR ipad, text))
*/
public class HMac : IMac
{
private const byte IPAD = (byte)0x36;
private const byte OPAD = (byte)0x5C;
private readonly IDigest digest;
private readonly int digestSize;
private readonly int blockLength;
private byte[] inputPad;
private byte[] outputPad;
public HMac(
IDigest digest)
{
this.digest = digest;
digestSize = digest.GetDigestSize();
blockLength = digest.GetByteLength();
inputPad = new byte[blockLength];
outputPad = new byte[blockLength];
}
public string AlgorithmName
{
get { return digest.AlgorithmName + "/HMAC"; }
}
public IDigest GetUnderlyingDigest()
{
return digest;
}
public void Init(
ICipherParameters parameters)
{
digest.Reset();
byte[] key = ((KeyParameter)parameters).GetKey();
if (key.Length > blockLength)
{
digest.BlockUpdate(key, 0, key.Length);
digest.DoFinal(inputPad, 0);
for (int i = digestSize; i < inputPad.Length; i++)
{
inputPad[i] = 0;
}
}
else
{
Array.Copy(key, 0, inputPad, 0, key.Length);
for (int i = key.Length; i < inputPad.Length; i++)
{
inputPad[i] = 0;
}
}
outputPad = new byte[inputPad.Length];
Array.Copy(inputPad, 0, outputPad, 0, inputPad.Length);
for (int i = 0; i < inputPad.Length; i++)
{
inputPad[i] ^= IPAD;
}
for (int i = 0; i < outputPad.Length; i++)
{
outputPad[i] ^= OPAD;
}
digest.BlockUpdate(inputPad, 0, inputPad.Length);
}
public int GetMacSize()
{
return digestSize;
}
public void Update(
byte input)
{
digest.Update(input);
}
public void BlockUpdate(
byte[] input,
int inOff,
int len)
{
digest.BlockUpdate(input, inOff, len);
}
public int DoFinal(
byte[] output,
int outOff)
{
byte[] tmp = new byte[digestSize];
digest.DoFinal(tmp, 0);
digest.BlockUpdate(outputPad, 0, outputPad.Length);
digest.BlockUpdate(tmp, 0, tmp.Length);
int len = digest.DoFinal(output, outOff);
Reset();
return len;
}
/**
* Reset the mac generator.
*/
public void Reset()
{
/*
* reset the underlying digest.
*/
digest.Reset();
/*
* reinitialize the digest.
*/
digest.BlockUpdate(inputPad, 0, inputPad.Length);
}
}
}

259
iTechSharp/srcbc/crypto/macs/ISO9797Alg3Mac.cs Normal file
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using System;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Paddings;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Crypto.Macs
{
/**
* DES based CBC Block Cipher MAC according to ISO9797, algorithm 3 (ANSI X9.19 Retail MAC)
*
* This could as well be derived from CBCBlockCipherMac, but then the property mac in the base
* class must be changed to protected
*/
public class ISO9797Alg3Mac : IMac
{
private byte[] mac;
private byte[] buf;
private int bufOff;
private IBlockCipher cipher;
private IBlockCipherPadding padding;
private int macSize;
private KeyParameter lastKey2;
private KeyParameter lastKey3;
/**
* create a Retail-MAC based on a CBC block cipher. This will produce an
* authentication code of the length of the block size of the cipher.
*
* @param cipher the cipher to be used as the basis of the MAC generation. This must
* be DESEngine.
*/
public ISO9797Alg3Mac(
IBlockCipher cipher)
: this(cipher, cipher.GetBlockSize() * 8, null)
{
}
/**
* create a Retail-MAC based on a CBC block cipher. This will produce an
* authentication code of the length of the block size of the cipher.
*
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param padding the padding to be used to complete the last block.
*/
public ISO9797Alg3Mac(
IBlockCipher cipher,
IBlockCipherPadding padding)
: this(cipher, cipher.GetBlockSize() * 8, padding)
{
}
/**
* create a Retail-MAC based on a block cipher with the size of the
* MAC been given in bits. This class uses single DES CBC mode as the basis for the
* MAC generation.
* <p>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
* </p>
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8.
*/
public ISO9797Alg3Mac(
IBlockCipher cipher,
int macSizeInBits)
: this(cipher, macSizeInBits, null)
{
}
/**
* create a standard MAC based on a block cipher with the size of the
* MAC been given in bits. This class uses single DES CBC mode as the basis for the
* MAC generation. The final block is decrypted and then encrypted using the
* middle and right part of the key.
* <p>
* Note: the size of the MAC must be at least 24 bits (FIPS Publication 81),
* or 16 bits if being used as a data authenticator (FIPS Publication 113),
* and in general should be less than the size of the block cipher as it reduces
* the chance of an exhaustive attack (see Handbook of Applied Cryptography).
* </p>
* @param cipher the cipher to be used as the basis of the MAC generation.
* @param macSizeInBits the size of the MAC in bits, must be a multiple of 8.
* @param padding the padding to be used to complete the last block.
*/
public ISO9797Alg3Mac(
IBlockCipher cipher,
int macSizeInBits,
IBlockCipherPadding padding)
{
if ((macSizeInBits % 8) != 0)
throw new ArgumentException("MAC size must be multiple of 8");
if (!(cipher is DesEngine))
throw new ArgumentException("cipher must be instance of DesEngine");
this.cipher = new CbcBlockCipher(cipher);
this.padding = padding;
this.macSize = macSizeInBits / 8;
mac = new byte[cipher.GetBlockSize()];
buf = new byte[cipher.GetBlockSize()];
bufOff = 0;
}
public string AlgorithmName
{
get { return "ISO9797Alg3"; }
}
public void Init(
ICipherParameters parameters)
{
Reset();
if (!(parameters is KeyParameter))
throw new ArgumentException("parameters must be an instance of KeyParameter");
// KeyParameter must contain a double or triple length DES key,
// however the underlying cipher is a single DES. The middle and
// right key are used only in the final step.
KeyParameter kp = (KeyParameter)parameters;
KeyParameter key1;
byte[] keyvalue = kp.GetKey();
if (keyvalue.Length == 16)
{ // Double length DES key
key1 = new KeyParameter(keyvalue, 0, 8);
this.lastKey2 = new KeyParameter(keyvalue, 8, 8);
this.lastKey3 = key1;
}
else if (keyvalue.Length == 24)
{ // Triple length DES key
key1 = new KeyParameter(keyvalue, 0, 8);
this.lastKey2 = new KeyParameter(keyvalue, 8, 8);
this.lastKey3 = new KeyParameter(keyvalue, 16, 8);
}
else
{
throw new ArgumentException("Key must be either 112 or 168 bit long");
}
cipher.Init(true, key1);
}
public int GetMacSize()
{
return macSize;
}
public void Update(
byte input)
{
if (bufOff == buf.Length)
{
cipher.ProcessBlock(buf, 0, mac, 0);
bufOff = 0;
}
buf[bufOff++] = input;
}
public void BlockUpdate(
byte[] input,
int inOff,
int len)
{
if (len < 0)
throw new ArgumentException("Can't have a negative input length!");
int blockSize = cipher.GetBlockSize();
int resultLen = 0;
int gapLen = blockSize - bufOff;
if (len > gapLen)
{
Array.Copy(input, inOff, buf, bufOff, gapLen);
resultLen += cipher.ProcessBlock(buf, 0, mac, 0);
bufOff = 0;
len -= gapLen;
inOff += gapLen;
while (len > blockSize)
{
resultLen += cipher.ProcessBlock(input, inOff, mac, 0);
len -= blockSize;
inOff += blockSize;
}
}
Array.Copy(input, inOff, buf, bufOff, len);
bufOff += len;
}
public int DoFinal(
byte[] output,
int outOff)
{
int blockSize = cipher.GetBlockSize();
if (padding == null)
{
// pad with zeroes
while (bufOff < blockSize)
{
buf[bufOff++] = 0;
}
}
else
{
if (bufOff == blockSize)
{
cipher.ProcessBlock(buf, 0, mac, 0);
bufOff = 0;
}
padding.AddPadding(buf, bufOff);
}
cipher.ProcessBlock(buf, 0, mac, 0);
// Added to code from base class
DesEngine deseng = new DesEngine();
deseng.Init(false, this.lastKey2);
deseng.ProcessBlock(mac, 0, mac, 0);
deseng.Init(true, this.lastKey3);
deseng.ProcessBlock(mac, 0, mac, 0);
// ****
Array.Copy(mac, 0, output, outOff, macSize);
Reset();
return macSize;
}
/**
* Reset the mac generator.
*/
public void Reset()
{
Array.Clear(buf, 0, buf.Length);
bufOff = 0;
// reset the underlying cipher.
cipher.Reset();
}
}
}

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iTechSharp/srcbc/crypto/macs/VMPCMac.cs Normal file
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using System;
using Org.BouncyCastle.Crypto.Parameters;
namespace Org.BouncyCastle.Crypto.Macs
{
public class VmpcMac
: IMac
{
private byte g;
private byte n = 0;
private byte[] P = null;
private byte s = 0;
private byte[] T;
private byte[] workingIV;
private byte[] workingKey;
private byte x1, x2, x3, x4;
public virtual int DoFinal(byte[] output, int outOff)
{
// Execute the Post-Processing Phase
for (int r = 1; r < 25; r++)
{
s = P[(s + P[n & 0xff]) & 0xff];
x4 = P[(x4 + x3 + r) & 0xff];
x3 = P[(x3 + x2 + r) & 0xff];
x2 = P[(x2 + x1 + r) & 0xff];
x1 = P[(x1 + s + r) & 0xff];
T[g & 0x1f] = (byte) (T[g & 0x1f] ^ x1);
T[(g + 1) & 0x1f] = (byte) (T[(g + 1) & 0x1f] ^ x2);
T[(g + 2) & 0x1f] = (byte) (T[(g + 2) & 0x1f] ^ x3);
T[(g + 3) & 0x1f] = (byte) (T[(g + 3) & 0x1f] ^ x4);
g = (byte) ((g + 4) & 0x1f);
byte temp = P[n & 0xff];
P[n & 0xff] = P[s & 0xff];
P[s & 0xff] = temp;
n = (byte) ((n + 1) & 0xff);
}
// Input T to the IV-phase of the VMPC KSA
for (int m = 0; m < 768; m++)
{
s = P[(s + P[m & 0xff] + T[m & 0x1f]) & 0xff];
byte temp = P[m & 0xff];
P[m & 0xff] = P[s & 0xff];
P[s & 0xff] = temp;
}
// Store 20 new outputs of the VMPC Stream Cipher input table M
byte[] M = new byte[20];
for (int i = 0; i < 20; i++)
{
s = P[(s + P[i & 0xff]) & 0xff];
M[i] = P[(P[(P[s & 0xff]) & 0xff] + 1) & 0xff];
byte temp = P[i & 0xff];
P[i & 0xff] = P[s & 0xff];
P[s & 0xff] = temp;
}
Array.Copy(M, 0, output, outOff, M.Length);
Reset();
return M.Length;
}
public virtual string AlgorithmName
{
get { return "VMPC-MAC"; }
}
public virtual int GetMacSize()
{
return 20;
}
public virtual void Init(ICipherParameters parameters)
{
if (!(parameters is ParametersWithIV))
throw new ArgumentException("VMPC-MAC Init parameters must include an IV", "parameters");
ParametersWithIV ivParams = (ParametersWithIV) parameters;
KeyParameter key = (KeyParameter) ivParams.Parameters;
if (!(ivParams.Parameters is KeyParameter))
throw new ArgumentException("VMPC-MAC Init parameters must include a key", "parameters");
this.workingIV = ivParams.GetIV();
if (workingIV == null || workingIV.Length < 1 || workingIV.Length > 768)
throw new ArgumentException("VMPC-MAC requires 1 to 768 bytes of IV", "parameters");
this.workingKey = key.GetKey();
Reset();
}
private void initKey(byte[] keyBytes, byte[] ivBytes)
{
s = 0;
P = new byte[256];
for (int i = 0; i < 256; i++)
{
P[i] = (byte) i;
}
for (int m = 0; m < 768; m++)
{
s = P[(s + P[m & 0xff] + keyBytes[m % keyBytes.Length]) & 0xff];
byte temp = P[m & 0xff];
P[m & 0xff] = P[s & 0xff];
P[s & 0xff] = temp;
}
for (int m = 0; m < 768; m++)
{
s = P[(s + P[m & 0xff] + ivBytes[m % ivBytes.Length]) & 0xff];
byte temp = P[m & 0xff];
P[m & 0xff] = P[s & 0xff];
P[s & 0xff] = temp;
}
n = 0;
}
public virtual void Reset()
{
initKey(this.workingKey, this.workingIV);
g = x1 = x2 = x3 = x4 = n = 0;
T = new byte[32];
for (int i = 0; i < 32; i++)
{
T[i] = 0;
}
}
public virtual void Update(byte input)
{
s = P[(s + P[n & 0xff]) & 0xff];
byte c = (byte) (input ^ P[(P[(P[s & 0xff]) & 0xff] + 1) & 0xff]);
x4 = P[(x4 + x3) & 0xff];
x3 = P[(x3 + x2) & 0xff];
x2 = P[(x2 + x1) & 0xff];
x1 = P[(x1 + s + c) & 0xff];
T[g & 0x1f] = (byte) (T[g & 0x1f] ^ x1);
T[(g + 1) & 0x1f] = (byte) (T[(g + 1) & 0x1f] ^ x2);
T[(g + 2) & 0x1f] = (byte) (T[(g + 2) & 0x1f] ^ x3);
T[(g + 3) & 0x1f] = (byte) (T[(g + 3) & 0x1f] ^ x4);
g = (byte) ((g + 4) & 0x1f);
byte temp = P[n & 0xff];
P[n & 0xff] = P[s & 0xff];
P[s & 0xff] = temp;
n = (byte) ((n + 1) & 0xff);
}
public virtual void BlockUpdate(byte[] input, int inOff, int len)
{
if ((inOff + len) > input.Length)
throw new DataLengthException("input buffer too short");
for (int i = 0; i < len; i++)
{
Update(input[i]);
}
}
}
}