47 lines
1.9 KiB
Java
47 lines
1.9 KiB
Java
package org.bouncycastle.crypto.engines;
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import org.bouncycastle.util.Pack;
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/* loaded from: classes6.dex */
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public class XSalsa20Engine extends Salsa20Engine {
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@Override // org.bouncycastle.crypto.engines.Salsa20Engine
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protected int getNonceSize() {
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return 24;
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}
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/* JADX INFO: Access modifiers changed from: protected */
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@Override // org.bouncycastle.crypto.engines.Salsa20Engine
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public void setKey(byte[] bArr, byte[] bArr2) {
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if (bArr == null) {
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StringBuilder sb = new StringBuilder();
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sb.append(getAlgorithmName());
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sb.append(" doesn't support re-init with null key");
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throw new IllegalArgumentException(sb.toString());
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}
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if (bArr.length != 32) {
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StringBuilder sb2 = new StringBuilder();
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sb2.append(getAlgorithmName());
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sb2.append(" requires a 256 bit key");
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throw new IllegalArgumentException(sb2.toString());
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}
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super.setKey(bArr, bArr2);
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Pack.littleEndianToInt(bArr2, 8, this.engineState, 8, 2);
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int[] iArr = new int[this.engineState.length];
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salsaCore(20, this.engineState, iArr);
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this.engineState[1] = iArr[0] - this.engineState[0];
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this.engineState[2] = iArr[5] - this.engineState[5];
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this.engineState[3] = iArr[10] - this.engineState[10];
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this.engineState[4] = iArr[15] - this.engineState[15];
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this.engineState[11] = iArr[6] - this.engineState[6];
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this.engineState[12] = iArr[7] - this.engineState[7];
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this.engineState[13] = iArr[8] - this.engineState[8];
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this.engineState[14] = iArr[9] - this.engineState[9];
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Pack.littleEndianToInt(bArr2, 16, this.engineState, 6, 2);
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}
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@Override // org.bouncycastle.crypto.engines.Salsa20Engine, org.bouncycastle.crypto.StreamCipher
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public String getAlgorithmName() {
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return "XSalsa20";
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}
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}
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