.class public final Lcom/google/android/gms/internal/firebase-auth-api/zzka;
.super Ljava/lang/Object;
.source "com.google.firebase:firebase-auth@@21.0.1"

# interfaces
.implements Lcom/google/android/gms/internal/firebase-auth-api/zzag;


# static fields
.field private static final zza:Ljava/lang/ThreadLocal;
    .annotation system Ldalvik/annotation/Signature;
        value = {
            "Ljava/lang/ThreadLocal<",
            "Ljavax/crypto/Cipher;",
            ">;"
        }
    .end annotation
.end field


# instance fields
.field private final zzb:Ljavax/crypto/SecretKey;


# direct methods
.method public static constructor <clinit>()V
    .locals 1

    new-instance v0, Lcom/google/android/gms/internal/firebase-auth-api/zzjz;

    .line 1
    invoke-direct {v0}, Lcom/google/android/gms/internal/firebase-auth-api/zzjz;-><init>()V

    sput-object v0, Lcom/google/android/gms/internal/firebase-auth-api/zzka;->zza:Ljava/lang/ThreadLocal;

    return-void
.end method

.method public constructor <init>([B)V
    .locals 2
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/security/GeneralSecurityException;
        }
    .end annotation

    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 1
    array-length v0, p1

    invoke-static {v0}, Lcom/google/android/gms/internal/firebase-auth-api/zzli;->zzb(I)V

    .line 2
    new-instance v0, Ljavax/crypto/spec/SecretKeySpec;

    const-string v1, "AES"

    invoke-direct {v0, p1, v1}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    iput-object v0, p0, Lcom/google/android/gms/internal/firebase-auth-api/zzka;->zzb:Ljavax/crypto/SecretKey;

    return-void
.end method


# virtual methods
.method public final zza([B[B)[B
    .locals 7
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/security/GeneralSecurityException;
        }
    .end annotation

    .line 1
    array-length v0, p1

    const/16 v1, 0x1c

    if-lt v0, v1, :cond_2

    .line 2
    invoke-static {}, Lcom/google/android/gms/internal/firebase-auth-api/zzlh;->zzb()Z

    move-result v1

    const/4 v2, 0x0

    const/16 v3, 0xc

    if-eqz v1, :cond_0

    invoke-static {}, Lcom/google/android/gms/internal/firebase-auth-api/zzlh;->zza()I

    move-result v1

    const/16 v4, 0x13

    if-gt v1, v4, :cond_0

    .line 3
    new-instance v1, Ljavax/crypto/spec/IvParameterSpec;

    invoke-direct {v1, p1, v2, v3}, Ljavax/crypto/spec/IvParameterSpec;-><init>([BII)V

    goto :goto_0

    .line 4
    :cond_0
    new-instance v1, Ljavax/crypto/spec/GCMParameterSpec;

    const/16 v4, 0x80

    invoke-direct {v1, v4, p1, v2, v3}, Ljavax/crypto/spec/GCMParameterSpec;-><init>(I[BII)V

    .line 5
    :goto_0
    sget-object v2, Lcom/google/android/gms/internal/firebase-auth-api/zzka;->zza:Ljava/lang/ThreadLocal;

    .line 6
    invoke-virtual {v2}, Ljava/lang/ThreadLocal;->get()Ljava/lang/Object;

    move-result-object v4

    check-cast v4, Ljavax/crypto/Cipher;

    const/4 v5, 0x2

    iget-object v6, p0, Lcom/google/android/gms/internal/firebase-auth-api/zzka;->zzb:Ljavax/crypto/SecretKey;

    invoke-virtual {v4, v5, v6, v1}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V

    array-length v1, p2

    if-eqz v1, :cond_1

    .line 7
    invoke-virtual {v2}, Ljava/lang/ThreadLocal;->get()Ljava/lang/Object;

    move-result-object v1

    check-cast v1, Ljavax/crypto/Cipher;

    invoke-virtual {v1, p2}, Ljavax/crypto/Cipher;->updateAAD([B)V

    .line 8
    :cond_1
    invoke-virtual {v2}, Ljava/lang/ThreadLocal;->get()Ljava/lang/Object;

    move-result-object p2

    check-cast p2, Ljavax/crypto/Cipher;

    add-int/lit8 v0, v0, -0xc

    .line 9
    invoke-virtual {p2, p1, v3, v0}, Ljavax/crypto/Cipher;->doFinal([BII)[B

    move-result-object p1

    return-object p1

    .line 10
    :cond_2
    new-instance p1, Ljava/security/GeneralSecurityException;

    const-string p2, "ciphertext too short"

    invoke-direct {p1, p2}, Ljava/security/GeneralSecurityException;-><init>(Ljava/lang/String;)V

    throw p1
.end method

.method public final zzb([B[B)[B
    .locals 0
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/security/GeneralSecurityException;
        }
    .end annotation

    const/4 p1, 0x0

    throw p1
.end method