85 lines
3.1 KiB
Java
85 lines
3.1 KiB
Java
package o;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.security.GeneralSecurityException;
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import java.security.InvalidKeyException;
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import javax.crypto.AEADBadTagException;
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import o.uAf;
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/* loaded from: classes2.dex */
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abstract class BRX {
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private static uAf.RVV e = uAf.RVV.ALGORITHM_NOT_FIPS;
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private final AbstractC5396bsJ a;
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private final AbstractC5396bsJ b;
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abstract AbstractC5396bsJ d(byte[] bArr, int i) throws InvalidKeyException;
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public BRX(byte[] bArr) throws GeneralSecurityException {
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if (!e.d()) {
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throw new GeneralSecurityException("Can not use ChaCha20Poly1305 in FIPS-mode.");
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}
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this.a = d(bArr, 1);
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this.b = d(bArr, 0);
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}
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public void b(ByteBuffer byteBuffer, byte[] bArr, byte[] bArr2, byte[] bArr3) throws GeneralSecurityException {
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if (byteBuffer.remaining() < bArr2.length + 16) {
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throw new IllegalArgumentException("Given ByteBuffer output is too small");
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}
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int position = byteBuffer.position();
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this.a.e(byteBuffer, bArr, bArr2);
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byteBuffer.position(position);
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byteBuffer.limit(byteBuffer.limit() - 16);
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if (bArr3 == null) {
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bArr3 = new byte[0];
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}
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byte[] bArr4 = new byte[32];
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this.b.b(bArr, 0).get(bArr4);
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byte[] c = C5926cDf.c(bArr4, e(bArr3, byteBuffer));
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byteBuffer.limit(byteBuffer.limit() + 16);
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byteBuffer.put(c);
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}
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public byte[] a(ByteBuffer byteBuffer, byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
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if (byteBuffer.remaining() < 16) {
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throw new GeneralSecurityException("ciphertext too short");
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}
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int position = byteBuffer.position();
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byte[] bArr3 = new byte[16];
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byteBuffer.position(byteBuffer.limit() - 16);
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byteBuffer.get(bArr3);
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byteBuffer.position(position);
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byteBuffer.limit(byteBuffer.limit() - 16);
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if (bArr2 == null) {
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bArr2 = new byte[0];
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}
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try {
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byte[] bArr4 = new byte[32];
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this.b.b(bArr, 0).get(bArr4);
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if (vil.d(C5926cDf.c(bArr4, e(bArr2, byteBuffer)), bArr3)) {
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byteBuffer.position(position);
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return this.a.c(bArr, byteBuffer);
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}
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throw new GeneralSecurityException("invalid MAC");
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} catch (GeneralSecurityException e2) {
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throw new AEADBadTagException(e2.toString());
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}
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}
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private static byte[] e(byte[] bArr, ByteBuffer byteBuffer) {
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int length = bArr.length % 16 == 0 ? bArr.length : (bArr.length + 16) - (bArr.length % 16);
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int remaining = byteBuffer.remaining();
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int i = remaining % 16;
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int i2 = (i == 0 ? remaining : (remaining + 16) - i) + length;
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ByteBuffer order = ByteBuffer.allocate(i2 + 16).order(ByteOrder.LITTLE_ENDIAN);
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order.put(bArr);
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order.position(length);
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order.put(byteBuffer);
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order.position(i2);
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order.putLong(bArr.length);
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order.putLong(remaining);
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return order.array();
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}
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}
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