82 lines
3.2 KiB
Java
82 lines
3.2 KiB
Java
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package org.bouncycastle.crypto.engines;
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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.OutputLengthException;
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import org.bouncycastle.crypto.params.KeyParameter;
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/* loaded from: classes6.dex */
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public class DESedeEngine extends DESEngine {
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protected static final int BLOCK_SIZE = 8;
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private boolean forEncryption;
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private int[] workingKey1 = null;
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private int[] workingKey2 = null;
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private int[] workingKey3 = null;
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@Override // org.bouncycastle.crypto.engines.DESEngine, org.bouncycastle.crypto.BlockCipher
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public int getBlockSize() {
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return 8;
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}
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@Override // org.bouncycastle.crypto.engines.DESEngine, org.bouncycastle.crypto.BlockCipher
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public void reset() {
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}
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@Override // org.bouncycastle.crypto.engines.DESEngine, org.bouncycastle.crypto.BlockCipher
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public int processBlock(byte[] bArr, int i, byte[] bArr2, int i2) {
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int[] iArr = this.workingKey1;
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if (iArr == null) {
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throw new IllegalStateException("DESede engine not initialised");
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}
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if (i + 8 > bArr.length) {
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throw new DataLengthException("input buffer too short");
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}
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if (i2 + 8 > bArr2.length) {
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throw new OutputLengthException("output buffer too short");
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}
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byte[] bArr3 = new byte[8];
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if (this.forEncryption) {
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desFunc(iArr, bArr, i, bArr3, 0);
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desFunc(this.workingKey2, bArr3, 0, bArr3, 0);
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desFunc(this.workingKey3, bArr3, 0, bArr2, i2);
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} else {
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desFunc(this.workingKey3, bArr, i, bArr3, 0);
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desFunc(this.workingKey2, bArr3, 0, bArr3, 0);
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desFunc(this.workingKey1, bArr3, 0, bArr2, i2);
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}
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return 8;
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}
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@Override // org.bouncycastle.crypto.engines.DESEngine, org.bouncycastle.crypto.BlockCipher
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public void init(boolean z, CipherParameters cipherParameters) {
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if (!(cipherParameters instanceof KeyParameter)) {
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StringBuilder sb = new StringBuilder("invalid parameter passed to DESede 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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byte[] key = ((KeyParameter) cipherParameters).getKey();
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if (key.length != 24 && key.length != 16) {
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throw new IllegalArgumentException("key size must be 16 or 24 bytes.");
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}
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this.forEncryption = z;
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byte[] bArr = new byte[8];
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System.arraycopy(key, 0, bArr, 0, 8);
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this.workingKey1 = generateWorkingKey(z, bArr);
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byte[] bArr2 = new byte[8];
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System.arraycopy(key, 8, bArr2, 0, 8);
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this.workingKey2 = generateWorkingKey(!z, bArr2);
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if (key.length != 24) {
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this.workingKey3 = this.workingKey1;
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return;
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}
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byte[] bArr3 = new byte[8];
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System.arraycopy(key, 16, bArr3, 0, 8);
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this.workingKey3 = generateWorkingKey(z, bArr3);
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}
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@Override // org.bouncycastle.crypto.engines.DESEngine, org.bouncycastle.crypto.BlockCipher
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public String getAlgorithmName() {
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return "DESede";
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}
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}
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