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-rw-r--r--bcprov/src/main/java/org/bouncycastle/crypto/macs/GOST28147Mac.java298
1 files changed, 0 insertions, 298 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/crypto/macs/GOST28147Mac.java b/bcprov/src/main/java/org/bouncycastle/crypto/macs/GOST28147Mac.java
deleted file mode 100644
index b71975b..0000000
--- a/bcprov/src/main/java/org/bouncycastle/crypto/macs/GOST28147Mac.java
+++ /dev/null
@@ -1,298 +0,0 @@
-package org.bouncycastle.crypto.macs;
-
-import org.bouncycastle.crypto.CipherParameters;
-import org.bouncycastle.crypto.DataLengthException;
-import org.bouncycastle.crypto.Mac;
-import org.bouncycastle.crypto.params.KeyParameter;
-import org.bouncycastle.crypto.params.ParametersWithSBox;
-
-/**
- * implementation of GOST 28147-89 MAC
- */
-public class GOST28147Mac
- implements Mac
-{
- private int blockSize = 8;
- private int macSize = 4;
- private int bufOff;
- private byte[] buf;
- private byte[] mac;
- private boolean firstStep = true;
- private int[] workingKey = null;
-
- //
- // 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 int[] generateWorkingKey(
- byte[] userKey)
- {
- if (userKey.length != 32)
- {
- throw new IllegalArgumentException("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(
- CipherParameters params)
- throws IllegalArgumentException
- {
- reset();
- buf = new byte[blockSize];
- if (params instanceof ParametersWithSBox)
- {
- ParametersWithSBox param = (ParametersWithSBox)params;
-
- //
- // Set the S-Box
- //
- System.arraycopy(param.getSBox(), 0, this.S, 0, param.getSBox().length);
-
- //
- // set key if there is one
- //
- if (param.getParameters() != null)
- {
- workingKey = generateWorkingKey(((KeyParameter)param.getParameters()).getKey());
- }
- }
- else if (params instanceof KeyParameter)
- {
- workingKey = generateWorkingKey(((KeyParameter)params).getKey());
- }
- else
- {
- throw new IllegalArgumentException("invalid parameter passed to GOST28147 init - " + params.getClass().getName());
- }
- }
-
- public String getAlgorithmName()
- {
- 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
- }
-
- private void gost28147MacFunc(
- int[] workingKey,
- byte[] in,
- int inOff,
- byte[] out,
- int outOff)
- {
- int N1, N2, tmp; //tmp -> for saving N1
- N1 = bytesToint(in, inOff);
- N2 = bytesToint(in, 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, out, outOff);
- intTobytes(N2, out, outOff + 4);
- }
-
- //array of bytes to type int
- private int bytesToint(
- byte[] in,
- int inOff)
- {
- return ((in[inOff + 3] << 24) & 0xff000000) + ((in[inOff + 2] << 16) & 0xff0000) +
- ((in[inOff + 1] << 8) & 0xff00) + (in[inOff] & 0xff);
- }
-
- //int to array of bytes
- private void intTobytes(
- int num,
- byte[] out,
- int outOff)
- {
- out[outOff + 3] = (byte)(num >>> 24);
- out[outOff + 2] = (byte)(num >>> 16);
- out[outOff + 1] = (byte)(num >>> 8);
- out[outOff] = (byte)num;
- }
-
- private byte[] CM5func(byte[] buf, int bufOff, byte[] mac)
- {
- byte[] sum = new byte[buf.length - bufOff];
-
- System.arraycopy(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 in)
- throws IllegalStateException
- {
- if (bufOff == buf.length)
- {
- byte[] sumbuf = new byte[buf.length];
- System.arraycopy(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++] = in;
- }
-
- public void update(byte[] in, int inOff, int len)
- throws DataLengthException, IllegalStateException
- {
- if (len < 0)
- {
- throw new IllegalArgumentException("Can't have a negative input length!");
- }
-
- int gapLen = blockSize - bufOff;
-
- if (len > gapLen)
- {
- System.arraycopy(in, inOff, buf, bufOff, gapLen);
-
- byte[] sumbuf = new byte[buf.length];
- System.arraycopy(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(in, inOff, mac);
- gost28147MacFunc(workingKey, sumbuf, 0, mac, 0);
-
- len -= blockSize;
- inOff += blockSize;
- }
- }
-
- System.arraycopy(in, inOff, buf, bufOff, len);
-
- bufOff += len;
- }
-
- public int doFinal(byte[] out, int outOff)
- throws DataLengthException, IllegalStateException
- {
- //padding with zero
- while (bufOff < blockSize)
- {
- buf[bufOff] = 0;
- bufOff++;
- }
-
- byte[] sumbuf = new byte[buf.length];
- System.arraycopy(buf, 0, sumbuf, 0, mac.length);
-
- if (firstStep)
- {
- firstStep = false;
- }
- else
- {
- sumbuf = CM5func(buf, 0, mac);
- }
-
- gost28147MacFunc(workingKey, sumbuf, 0, mac, 0);
-
- System.arraycopy(mac, (mac.length/2)-macSize, out, outOff, macSize);
-
- reset();
-
- return macSize;
- }
-
- public void reset()
- {
- /*
- * clean the buffer.
- */
- for (int i = 0; i < buf.length; i++)
- {
- buf[i] = 0;
- }
-
- bufOff = 0;
-
- firstStep = true;
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-24 16:59:03 +0000