208 lines
7.9 KiB
Java
208 lines
7.9 KiB
Java
package org.bouncycastle.crypto.macs;
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import com.google.common.base.Ascii;
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import com.google.common.primitives.UnsignedBytes;
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import org.bouncycastle.crypto.CipherParameters;
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import org.bouncycastle.crypto.DataLengthException;
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import org.bouncycastle.crypto.Mac;
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import org.bouncycastle.crypto.params.KeyParameter;
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import org.bouncycastle.crypto.params.ParametersWithSBox;
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import org.bouncycastle.crypto.tls.CipherSuite;
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/* loaded from: classes6.dex */
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public class GOST28147Mac implements Mac {
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private int blockSize = 8;
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private int macSize = 4;
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private boolean firstStep = true;
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private int[] workingKey = null;
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private byte[] S = {9, 6, 3, 2, 8, 11, 1, 7, 10, 4, 14, 15, 12, 0, 13, 5, 3, 7, 14, 9, 8, 10, 15, 0, 5, 2, 6, 12, 11, 4, 13, 1, 14, 4, 6, 2, 11, 3, 13, 8, 12, 15, 5, 10, 0, 7, 1, 9, 14, 7, 10, 12, 13, 1, 3, 9, 0, 2, 11, 4, 15, 8, 5, 6, 11, 5, 1, 9, 8, 13, 15, 0, 14, 4, 2, 3, 12, 7, 10, 6, 3, 10, 13, 12, 1, 2, 0, 11, 7, 5, 9, 4, 8, 15, 14, 6, 1, 13, 2, 9, 7, 10, 6, 0, 8, 12, 4, 5, 15, 3, 11, 14, 11, 10, 15, 5, 0, 12, 14, 8, 6, 2, 3, 9, 1, 7, 13, 4};
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private byte[] mac = new byte[8];
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private byte[] buf = new byte[8];
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private int bufOff = 0;
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@Override // org.bouncycastle.crypto.Mac
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public void update(byte[] bArr, int i, int i2) throws DataLengthException, IllegalStateException {
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if (i2 < 0) {
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throw new IllegalArgumentException("Can't have a negative input length!");
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}
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int i3 = this.blockSize;
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int i4 = this.bufOff;
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int i5 = i3 - i4;
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if (i2 > i5) {
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System.arraycopy(bArr, i, this.buf, i4, i5);
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byte[] bArr2 = this.buf;
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byte[] bArr3 = new byte[bArr2.length];
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System.arraycopy(bArr2, 0, bArr3, 0, this.mac.length);
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if (this.firstStep) {
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this.firstStep = false;
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} else {
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bArr3 = CM5func(this.buf, 0, this.mac);
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}
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gost28147MacFunc(this.workingKey, bArr3, 0, this.mac, 0);
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this.bufOff = 0;
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while (true) {
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i2 -= i5;
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i += i5;
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if (i2 <= this.blockSize) {
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break;
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}
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gost28147MacFunc(this.workingKey, CM5func(bArr, i, this.mac), 0, this.mac, 0);
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i5 = this.blockSize;
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}
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}
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System.arraycopy(bArr, i, this.buf, this.bufOff, i2);
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this.bufOff += i2;
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}
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@Override // org.bouncycastle.crypto.Mac
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public void update(byte b) throws IllegalStateException {
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int i = this.bufOff;
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byte[] bArr = this.buf;
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if (i == bArr.length) {
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byte[] bArr2 = new byte[bArr.length];
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System.arraycopy(bArr, 0, bArr2, 0, this.mac.length);
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if (this.firstStep) {
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this.firstStep = false;
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} else {
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bArr2 = CM5func(this.buf, 0, this.mac);
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}
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gost28147MacFunc(this.workingKey, bArr2, 0, this.mac, 0);
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this.bufOff = 0;
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}
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byte[] bArr3 = this.buf;
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int i2 = this.bufOff;
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this.bufOff = i2 + 1;
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bArr3[i2] = b;
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}
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@Override // org.bouncycastle.crypto.Mac
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public void reset() {
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int i = 0;
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while (true) {
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byte[] bArr = this.buf;
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if (i >= bArr.length) {
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this.bufOff = 0;
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this.firstStep = true;
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return;
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} else {
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bArr[i] = 0;
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i++;
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}
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}
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}
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@Override // org.bouncycastle.crypto.Mac
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public void init(CipherParameters cipherParameters) throws IllegalArgumentException {
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reset();
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this.buf = new byte[this.blockSize];
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if (cipherParameters instanceof ParametersWithSBox) {
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ParametersWithSBox parametersWithSBox = (ParametersWithSBox) cipherParameters;
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System.arraycopy(parametersWithSBox.getSBox(), 0, this.S, 0, parametersWithSBox.getSBox().length);
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if (parametersWithSBox.getParameters() != null) {
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this.workingKey = generateWorkingKey(((KeyParameter) parametersWithSBox.getParameters()).getKey());
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return;
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}
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return;
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}
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if (cipherParameters instanceof KeyParameter) {
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this.workingKey = generateWorkingKey(((KeyParameter) cipherParameters).getKey());
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} else {
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StringBuilder sb = new StringBuilder("invalid parameter passed to GOST28147 init - ");
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sb.append(cipherParameters.getClass().getName());
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throw new IllegalArgumentException(sb.toString());
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}
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}
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@Override // org.bouncycastle.crypto.Mac
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public int getMacSize() {
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return this.macSize;
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}
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@Override // org.bouncycastle.crypto.Mac
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public String getAlgorithmName() {
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return "GOST28147Mac";
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}
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@Override // org.bouncycastle.crypto.Mac
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public int doFinal(byte[] bArr, int i) throws DataLengthException, IllegalStateException {
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while (true) {
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int i2 = this.bufOff;
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if (i2 >= this.blockSize) {
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break;
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}
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this.buf[i2] = 0;
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this.bufOff = i2 + 1;
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}
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byte[] bArr2 = this.buf;
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byte[] bArr3 = new byte[bArr2.length];
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System.arraycopy(bArr2, 0, bArr3, 0, this.mac.length);
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if (this.firstStep) {
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this.firstStep = false;
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} else {
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bArr3 = CM5func(this.buf, 0, this.mac);
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}
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gost28147MacFunc(this.workingKey, bArr3, 0, this.mac, 0);
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byte[] bArr4 = this.mac;
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int length = bArr4.length / 2;
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int i3 = this.macSize;
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System.arraycopy(bArr4, length - i3, bArr, i, i3);
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reset();
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return this.macSize;
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}
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private void intTobytes(int i, byte[] bArr, int i2) {
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bArr[i2 + 3] = (byte) (i >>> 24);
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bArr[i2 + 2] = (byte) (i >>> 16);
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bArr[i2 + 1] = (byte) (i >>> 8);
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bArr[i2] = (byte) i;
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}
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private int gost28147_mainStep(int i, int i2) {
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int i3 = i2 + i;
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byte[] bArr = this.S;
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int i4 = bArr[i3 & 15] + (bArr[((i3 >> 4) & 15) + 16] << 4) + (bArr[((i3 >> 8) & 15) + 32] << 8) + (bArr[((i3 >> 12) & 15) + 48] << 12) + (bArr[((i3 >> 16) & 15) + 64] << 16) + (bArr[((i3 >> 20) & 15) + 80] << Ascii.DC4) + (bArr[((i3 >> 24) & 15) + 96] << Ascii.CAN) + (bArr[((i3 >> 28) & 15) + 112] << 28);
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return (i4 << 11) | (i4 >>> 21);
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}
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private void gost28147MacFunc(int[] iArr, byte[] bArr, int i, byte[] bArr2, int i2) {
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int bytesToint = bytesToint(bArr, i);
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int bytesToint2 = bytesToint(bArr, i + 4);
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for (int i3 = 0; i3 < 2; i3++) {
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int i4 = 0;
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while (i4 < 8) {
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int gost28147_mainStep = gost28147_mainStep(bytesToint, iArr[i4]);
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i4++;
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int i5 = bytesToint;
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bytesToint = bytesToint2 ^ gost28147_mainStep;
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bytesToint2 = i5;
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}
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}
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intTobytes(bytesToint, bArr2, i2);
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intTobytes(bytesToint2, bArr2, i2 + 4);
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}
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private int[] generateWorkingKey(byte[] bArr) {
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if (bArr.length != 32) {
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throw new IllegalArgumentException("Key length invalid. Key needs to be 32 byte - 256 bit!!!");
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}
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int[] iArr = new int[8];
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for (int i = 0; i != 8; i++) {
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iArr[i] = bytesToint(bArr, i << 2);
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}
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return iArr;
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}
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private int bytesToint(byte[] bArr, int i) {
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return ((bArr[i + 3] << Ascii.CAN) & (-16777216)) + ((bArr[i + 2] << 16) & 16711680) + ((bArr[i + 1] << 8) & CipherSuite.DRAFT_TLS_DHE_RSA_WITH_AES_128_OCB) + (bArr[i] & UnsignedBytes.MAX_VALUE);
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}
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private byte[] CM5func(byte[] bArr, int i, byte[] bArr2) {
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byte[] bArr3 = new byte[bArr.length - i];
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System.arraycopy(bArr, i, bArr3, 0, bArr2.length);
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for (int i2 = 0; i2 != bArr2.length; i2++) {
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bArr3[i2] = (byte) (bArr3[i2] ^ bArr2[i2]);
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}
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return bArr3;
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}
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}
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