61 lines
2.2 KiB
Java
61 lines
2.2 KiB
Java
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package com.google.android.gms.internal.p002firebaseauthapi;
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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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/* loaded from: classes2.dex */
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abstract class zzdp {
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private final zzdn zza;
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private final zzdn zzb;
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public zzdp(byte[] bArr) throws GeneralSecurityException {
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if (!zzdv.zza(1)) {
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throw new GeneralSecurityException("Can not use ChaCha20Poly1305 in FIPS-mode.");
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}
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this.zza = zza(bArr, 1);
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this.zzb = zza(bArr, 0);
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}
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abstract zzdn zza(byte[] bArr, int i) throws InvalidKeyException;
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public final byte[] zzb(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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try {
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byte[] bArr4 = new byte[32];
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this.zzb.zzc(bArr, 0).get(bArr4);
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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;
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ByteBuffer order = ByteBuffer.allocate(i2 + 16).order(ByteOrder.LITTLE_ENDIAN);
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order.put(bArr2);
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order.position(0);
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order.put(byteBuffer);
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order.position(i2);
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order.putLong(0L);
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order.putLong(remaining);
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if (zzpp.zzb(zzds.zza(bArr4, order.array()), bArr3)) {
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byteBuffer.position(position);
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return this.zza.zzd(bArr, byteBuffer);
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}
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throw new GeneralSecurityException("invalid MAC");
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} catch (GeneralSecurityException e) {
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throw new AEADBadTagException(e.toString());
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}
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}
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public final byte[] zzc(byte[] bArr, byte[] bArr2, byte[] bArr3) throws GeneralSecurityException {
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return zzb(ByteBuffer.wrap(bArr2), bArr, bArr3);
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}
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}
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