136 lines
4.3 KiB
Java
136 lines
4.3 KiB
Java
package org.bouncycastle.crypto.macs;
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import org.bouncycastle.crypto.BlockCipher;
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import org.bouncycastle.crypto.CipherParameters;
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import org.bouncycastle.crypto.Mac;
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import org.bouncycastle.crypto.paddings.BlockCipherPadding;
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/* loaded from: classes6.dex */
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public class CFBBlockCipherMac implements Mac {
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private byte[] buf;
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private int bufOff;
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private MacCFBBlockCipher cipher;
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private byte[] mac;
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private int macSize;
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private BlockCipherPadding padding;
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@Override // org.bouncycastle.crypto.Mac
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public void update(byte[] bArr, int i, int i2) {
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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 blockSize = this.cipher.getBlockSize();
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int i3 = this.bufOff;
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int i4 = blockSize - i3;
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if (i2 > i4) {
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System.arraycopy(bArr, i, this.buf, i3, i4);
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this.cipher.processBlock(this.buf, 0, this.mac, 0);
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this.bufOff = 0;
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i2 -= i4;
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i += i4;
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while (i2 > blockSize) {
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this.cipher.processBlock(bArr, i, this.mac, 0);
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i2 -= blockSize;
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i += 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) {
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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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this.cipher.processBlock(bArr, 0, this.mac, 0);
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this.bufOff = 0;
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}
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byte[] bArr2 = this.buf;
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int i2 = this.bufOff;
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this.bufOff = i2 + 1;
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bArr2[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.cipher.reset();
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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) {
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reset();
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this.cipher.init(cipherParameters);
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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 this.cipher.getAlgorithmName();
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}
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@Override // org.bouncycastle.crypto.Mac
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public int doFinal(byte[] bArr, int i) {
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int blockSize = this.cipher.getBlockSize();
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BlockCipherPadding blockCipherPadding = this.padding;
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if (blockCipherPadding == null) {
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while (true) {
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int i2 = this.bufOff;
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if (i2 >= 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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} else {
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blockCipherPadding.addPadding(this.buf, this.bufOff);
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}
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this.cipher.processBlock(this.buf, 0, this.mac, 0);
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this.cipher.getMacBlock(this.mac);
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System.arraycopy(this.mac, 0, bArr, i, this.macSize);
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reset();
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return this.macSize;
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}
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public CFBBlockCipherMac(BlockCipher blockCipher, BlockCipherPadding blockCipherPadding) {
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this(blockCipher, 8, (blockCipher.getBlockSize() << 3) / 2, blockCipherPadding);
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}
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public CFBBlockCipherMac(BlockCipher blockCipher, int i, int i2, BlockCipherPadding blockCipherPadding) {
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this.padding = null;
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if (i2 % 8 != 0) {
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throw new IllegalArgumentException("MAC size must be multiple of 8");
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}
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this.mac = new byte[blockCipher.getBlockSize()];
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MacCFBBlockCipher macCFBBlockCipher = new MacCFBBlockCipher(blockCipher, i);
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this.cipher = macCFBBlockCipher;
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this.padding = blockCipherPadding;
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this.macSize = i2 / 8;
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this.buf = new byte[macCFBBlockCipher.getBlockSize()];
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this.bufOff = 0;
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}
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public CFBBlockCipherMac(BlockCipher blockCipher, int i, int i2) {
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this(blockCipher, i, i2, null);
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}
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public CFBBlockCipherMac(BlockCipher blockCipher) {
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this(blockCipher, 8, (blockCipher.getBlockSize() << 3) / 2, null);
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}
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}
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