CrackMe.apk

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

import java.security.GeneralSecurityException;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/* renamed from: com.google.android.gms.internal.firebase-auth-api.zzpj  reason: invalid package */
/* compiled from: com.google.firebase:firebase-auth@@21.1.0 */
public final class zzpj implements zzqk {
    private static final ThreadLocal zza = new zzpi();
    private final SecretKeySpec zzb;
    private final int zzc;
    private final int zzd;

    public zzpj(byte[] bArr, int i) throws GeneralSecurityException {
        if (zzdv.zza(2)) {
            zzqs.zzb(bArr.length);
            this.zzb = new SecretKeySpec(bArr, "AES");
            int blockSize = ((Cipher) zza.get()).getBlockSize();
            this.zzd = blockSize;
            if (i < 12 || i > blockSize) {
                throw new GeneralSecurityException("invalid IV size");
            }
            this.zzc = i;
            return;
        }
        throw new GeneralSecurityException("Can not use AES-CTR in FIPS-mode, as BoringCrypto module is not available.");
    }

    public final byte[] zza(byte[] bArr) throws GeneralSecurityException {
        int length = bArr.length;
        int i = this.zzc;
        if (length >= i) {
            byte[] bArr2 = new byte[i];
            System.arraycopy(bArr, 0, bArr2, 0, i);
            int i2 = this.zzc;
            int i3 = length - i2;
            byte[] bArr3 = new byte[i3];
            Cipher cipher = (Cipher) zza.get();
            byte[] bArr4 = new byte[this.zzd];
            System.arraycopy(bArr2, 0, bArr4, 0, this.zzc);
            cipher.init(2, this.zzb, new IvParameterSpec(bArr4));
            if (cipher.doFinal(bArr, i2, i3, bArr3, 0) == i3) {
                return bArr3;
            }
            throw new GeneralSecurityException("stored output's length does not match input's length");
        }
        throw new GeneralSecurityException("ciphertext too short");
    }
}
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