95 lines
3.2 KiB
Java
95 lines
3.2 KiB
Java
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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.DataLengthException;
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import org.bouncycastle.crypto.params.ParametersWithIV;
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/* loaded from: classes6.dex */
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class MacCFBBlockCipher {
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private byte[] IV;
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private int blockSize;
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private byte[] cfbOutV;
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private byte[] cfbV;
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private BlockCipher cipher;
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public void reset() {
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byte[] bArr = this.IV;
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System.arraycopy(bArr, 0, this.cfbV, 0, bArr.length);
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this.cipher.reset();
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}
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public int processBlock(byte[] bArr, int i, byte[] bArr2, int i2) throws DataLengthException, IllegalStateException {
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int i3 = this.blockSize;
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if (i + i3 > bArr.length) {
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throw new DataLengthException("input buffer too short");
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}
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if (i3 + i2 > bArr2.length) {
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throw new DataLengthException("output buffer too short");
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}
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this.cipher.processBlock(this.cfbV, 0, this.cfbOutV, 0);
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int i4 = 0;
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while (true) {
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int i5 = this.blockSize;
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if (i4 >= i5) {
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byte[] bArr3 = this.cfbV;
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System.arraycopy(bArr3, i5, bArr3, 0, bArr3.length - i5);
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byte[] bArr4 = this.cfbV;
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int length = bArr4.length;
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int i6 = this.blockSize;
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System.arraycopy(bArr2, i2, bArr4, length - i6, i6);
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return this.blockSize;
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}
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bArr2[i2 + i4] = (byte) (this.cfbOutV[i4] ^ bArr[i + i4]);
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i4++;
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}
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}
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public void init(CipherParameters cipherParameters) throws IllegalArgumentException {
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BlockCipher blockCipher;
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if (cipherParameters instanceof ParametersWithIV) {
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ParametersWithIV parametersWithIV = (ParametersWithIV) cipherParameters;
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byte[] iv = parametersWithIV.getIV();
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int length = iv.length;
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byte[] bArr = this.IV;
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if (length < bArr.length) {
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System.arraycopy(iv, 0, bArr, bArr.length - iv.length, iv.length);
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} else {
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System.arraycopy(iv, 0, bArr, 0, bArr.length);
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}
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reset();
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blockCipher = this.cipher;
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cipherParameters = parametersWithIV.getParameters();
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} else {
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reset();
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blockCipher = this.cipher;
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}
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blockCipher.init(true, cipherParameters);
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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public void getMacBlock(byte[] bArr) {
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this.cipher.processBlock(this.cfbV, 0, bArr, 0);
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}
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public int getBlockSize() {
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return this.blockSize;
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}
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public String getAlgorithmName() {
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StringBuilder sb = new StringBuilder();
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sb.append(this.cipher.getAlgorithmName());
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sb.append("/CFB");
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sb.append(this.blockSize << 3);
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return sb.toString();
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}
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public MacCFBBlockCipher(BlockCipher blockCipher, int i) {
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this.cipher = blockCipher;
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this.blockSize = i / 8;
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this.IV = new byte[blockCipher.getBlockSize()];
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this.cfbV = new byte[blockCipher.getBlockSize()];
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this.cfbOutV = new byte[blockCipher.getBlockSize()];
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}
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}
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