package com.google.android.gms.internal.p002firebaseauthapi;

import java.util.Arrays;

/* loaded from: classes2.dex */
public final class zziz {
    public static byte[] zza(byte[] bArr) {
        int length = bArr.length;
        if (length >= 16) {
            throw new IllegalArgumentException("x must be smaller than a block.");
        }
        byte[] copyOf = Arrays.copyOf(bArr, 16);
        copyOf[length] = Byte.MIN_VALUE;
        return copyOf;
    }

    public static byte[] zzb(byte[] bArr) {
        if (bArr.length != 16) {
            throw new IllegalArgumentException("value must be a block.");
        }
        byte[] bArr2 = new byte[16];
        for (int i = 0; i < 16; i++) {
            byte b = bArr[i];
            byte b2 = (byte) ((b + b) & 254);
            bArr2[i] = b2;
            if (i < 15) {
                bArr2[i] = (byte) (((bArr[i + 1] >> 7) & 1) | b2);
            }
        }
        bArr2[15] = (byte) (((byte) ((bArr[0] >> 7) & 135)) ^ bArr2[15]);
        return bArr2;
    }
}