rr3-apk/decompiled-community/sources/com/google/android/gms/internal/ads/zzgum.java

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

import java.security.GeneralSecurityException;
import java.util.Arrays;
import javax.crypto.AEADBadTagException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import kotlin.jvm.internal.ByteCompanionObject;

/* loaded from: classes3.dex */
public final class zzgum implements zzgdn {
    private static final ThreadLocal zza = new zzguk();
    private static final ThreadLocal zzb = new zzgul();
    private final byte[] zzc;
    private final byte[] zzd;
    private final byte[] zze;
    private final SecretKeySpec zzf;
    private final int zzg;

    private zzgum(byte[] bArr, int i, byte[] bArr2) throws GeneralSecurityException {
        if (!zzgks.zza(1)) {
            throw new GeneralSecurityException("Can not use AES-EAX in FIPS-mode.");
        }
        if (i != 12 && i != 16) {
            throw new IllegalArgumentException("IV size should be either 12 or 16 bytes");
        }
        this.zzg = i;
        zzgvm.zza(bArr.length);
        SecretKeySpec secretKeySpec = new SecretKeySpec(bArr, "AES");
        this.zzf = secretKeySpec;
        Cipher cipher = (Cipher) zza.get();
        cipher.init(1, secretKeySpec);
        byte[] zzd = zzd(cipher.doFinal(new byte[16]));
        this.zzc = zzd;
        this.zzd = zzd(zzd);
        this.zze = bArr2;
    }

    public static zzgdn zzb(zzgfn zzgfnVar) throws GeneralSecurityException {
        if (zzgks.zza(1)) {
            return new zzgum(zzgfnVar.zzd().zzd(zzgdw.zza()), zzgfnVar.zzb().zzb(), zzgfnVar.zzc().zzc());
        }
        throw new GeneralSecurityException("Can not use AES-EAX in FIPS-mode.");
    }

    private static void zzc(byte[] bArr, byte[] bArr2) {
        int length = bArr.length;
        for (int i = 0; i < length; i++) {
            bArr[i] = (byte) (bArr[i] ^ bArr2[i]);
        }
    }

    private static byte[] zzd(byte[] bArr) {
        byte[] bArr2 = new byte[16];
        int i = 0;
        while (i < 15) {
            byte b = bArr[i];
            int i2 = i + 1;
            bArr2[i] = (byte) (((b + b) ^ ((bArr[i2] & 255) >>> 7)) & 255);
            i = i2;
        }
        byte b2 = bArr[15];
        bArr2[15] = (byte) (((bArr[0] >> 7) & 135) ^ (b2 + b2));
        return bArr2;
    }

    private final byte[] zze(Cipher cipher, int i, byte[] bArr, int i2, int i3) throws IllegalBlockSizeException, BadPaddingException, ShortBufferException {
        int length;
        byte[] bArr2 = new byte[16];
        bArr2[15] = (byte) i;
        if (i3 == 0) {
            zzc(bArr2, this.zzc);
            return cipher.doFinal(bArr2);
        }
        byte[] bArr3 = new byte[16];
        cipher.doFinal(bArr2, 0, 16, bArr3);
        int i4 = 0;
        while (true) {
            byte[] bArr4 = bArr2;
            bArr2 = bArr3;
            bArr3 = bArr4;
            if (i3 - i4 <= 16) {
                break;
            }
            for (int i5 = 0; i5 < 16; i5++) {
                bArr2[i5] = (byte) (bArr[(i2 + i4) + i5] ^ bArr2[i5]);
            }
            cipher.doFinal(bArr2, 0, 16, bArr3);
            i4 += 16;
        }
        byte[] copyOfRange = Arrays.copyOfRange(bArr, i4 + i2, i2 + i3);
        if (copyOfRange.length == 16) {
            zzc(copyOfRange, this.zzc);
        } else {
            byte[] copyOf = Arrays.copyOf(this.zzd, 16);
            int i6 = 0;
            while (true) {
                length = copyOfRange.length;
                if (i6 >= length) {
                    break;
                }
                copyOf[i6] = (byte) (copyOf[i6] ^ copyOfRange[i6]);
                i6++;
            }
            copyOf[length] = (byte) (copyOf[length] ^ ByteCompanionObject.MIN_VALUE);
            copyOfRange = copyOf;
        }
        zzc(bArr2, copyOfRange);
        cipher.doFinal(bArr2, 0, 16, bArr3);
        return bArr3;
    }

    @Override // com.google.android.gms.internal.ads.zzgdn
    public final byte[] zza(byte[] bArr, byte[] bArr2) throws GeneralSecurityException {
        byte[] bArr3 = this.zze;
        int length = bArr.length;
        int length2 = ((length - bArr3.length) - this.zzg) - 16;
        if (length2 < 0) {
            throw new GeneralSecurityException("ciphertext too short");
        }
        if (!zzgnu.zzc(bArr3, bArr)) {
            throw new GeneralSecurityException("Decryption failed (OutputPrefix mismatch).");
        }
        Cipher cipher = (Cipher) zza.get();
        cipher.init(1, this.zzf);
        byte[] zze = zze(cipher, 0, bArr, this.zze.length, this.zzg);
        if (bArr2 == null) {
            bArr2 = new byte[0];
        }
        byte[] bArr4 = bArr2;
        byte[] zze2 = zze(cipher, 1, bArr4, 0, bArr4.length);
        byte[] zze3 = zze(cipher, 2, bArr, this.zze.length + this.zzg, length2);
        int i = length - 16;
        byte b = 0;
        for (int i2 = 0; i2 < 16; i2++) {
            b = (byte) (b | (((bArr[i + i2] ^ zze2[i2]) ^ zze[i2]) ^ zze3[i2]));
        }
        if (b != 0) {
            throw new AEADBadTagException("tag mismatch");
        }
        Cipher cipher2 = (Cipher) zzb.get();
        cipher2.init(1, this.zzf, new IvParameterSpec(zze));
        return cipher2.doFinal(bArr, this.zze.length + this.zzg, length2);
    }
}