AesCipher.smali

.class public Lsg/bigo/sdk/blivestat/utils/AesCipher;
.super Ljava/lang/Object;
.source "SourceFile"


# static fields
.field private static final AES_CBC_NOPADDING:Ljava/lang/String; = "AES/CBC/NoPadding"

.field private static final BLOCK_SIZE:I = 0x10

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

.field private static cipher:Ljavax/crypto/Cipher;


# instance fields
.field private final m_key:[B


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

    .line 15
    new-instance v0, Lsg/bigo/sdk/blivestat/utils/AesCipher$1;

    invoke-direct {v0}, Lsg/bigo/sdk/blivestat/utils/AesCipher$1;-><init>()V

    sput-object v0, Lsg/bigo/sdk/blivestat/utils/AesCipher;->Cipher_AES_CBC_NOPADDING:Ljava/lang/ThreadLocal;

    return-void
.end method

.method public constructor <init>([B)V
    .registers 5

    .line 26
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    if-eqz p1, :cond_23

    .line 30
    iput-object p1, p0, Lsg/bigo/sdk/blivestat/utils/AesCipher;->m_key:[B

    :try_start_7
    const-string p1, "AES/CBC/NoPadding"

    .line 32
    invoke-static {p1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object p1

    sput-object p1, Lsg/bigo/sdk/blivestat/utils/AesCipher;->cipher:Ljavax/crypto/Cipher;

    .line 33
    new-instance p1, Ljavax/crypto/spec/SecretKeySpec;

    iget-object v0, p0, Lsg/bigo/sdk/blivestat/utils/AesCipher;->m_key:[B

    const-string v1, "AES"

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

    .line 34
    sget-object v0, Lsg/bigo/sdk/blivestat/utils/AesCipher;->cipher:Ljavax/crypto/Cipher;

    const/4 v1, 0x1

    invoke-direct {p0}, Lsg/bigo/sdk/blivestat/utils/AesCipher;->createIv()Ljavax/crypto/spec/IvParameterSpec;

    move-result-object v2

    invoke-virtual {v0, v1, p1, v2}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V
    :try_end_22
    .catchall {:try_start_7 .. :try_end_22} :catchall_22

    :catchall_22
    return-void

    .line 28
    :cond_23
    new-instance p1, Ljava/lang/IllegalArgumentException;

    const-string v0, "Key is null"

    invoke-direct {p1, v0}, Ljava/lang/IllegalArgumentException;-><init>(Ljava/lang/String;)V

    throw p1
.end method

.method private createIv()Ljavax/crypto/spec/IvParameterSpec;
    .registers 5

    .line 41
    iget-object v0, p0, Lsg/bigo/sdk/blivestat/utils/AesCipher;->m_key:[B

    array-length v1, v0

    new-array v1, v1, [B

    .line 42
    array-length v2, v0

    const/4 v3, 0x0

    invoke-static {v0, v3, v1, v3, v2}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 43
    new-instance v0, Ljavax/crypto/spec/IvParameterSpec;

    invoke-direct {v0, v1}, Ljavax/crypto/spec/IvParameterSpec;-><init>([B)V

    return-object v0
.end method

.method private fillBlock([B)[B
    .registers 5

    .line 47
    array-length v0, p1

    rem-int/lit8 v0, v0, 0x10

    if-nez v0, :cond_6

    return-object p1

    .line 51
    :cond_6
    array-length v1, p1

    add-int/lit8 v1, v1, 0x10

    sub-int/2addr v1, v0

    .line 52
    new-array v0, v1, [B

    .line 53
    array-length v1, p1

    const/4 v2, 0x0

    invoke-static {p1, v2, v0, v2, v1}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    return-object v0
.end method


# virtual methods
.method public encryptByAES([B)[B
    .registers 7

    const/4 v0, 0x0

    if-nez p1, :cond_4

    return-object v0

    .line 63
    :cond_4
    :try_start_4
    sget-object v1, Lsg/bigo/sdk/blivestat/utils/AesCipher;->cipher:Ljavax/crypto/Cipher;

    if-nez v1, :cond_25

    .line 64
    sget-object v1, Lsg/bigo/sdk/blivestat/utils/AesCipher;->Cipher_AES_CBC_NOPADDING:Ljava/lang/ThreadLocal;

    invoke-virtual {v1}, Ljava/lang/ThreadLocal;->get()Ljava/lang/Object;

    move-result-object v1

    check-cast v1, Ljavax/crypto/Cipher;

    sput-object v1, Lsg/bigo/sdk/blivestat/utils/AesCipher;->cipher:Ljavax/crypto/Cipher;

    .line 65
    new-instance v1, Ljavax/crypto/spec/SecretKeySpec;

    iget-object v2, p0, Lsg/bigo/sdk/blivestat/utils/AesCipher;->m_key:[B

    const-string v3, "AES"

    invoke-direct {v1, v2, v3}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 66
    sget-object v2, Lsg/bigo/sdk/blivestat/utils/AesCipher;->cipher:Ljavax/crypto/Cipher;

    const/4 v3, 0x1

    invoke-direct {p0}, Lsg/bigo/sdk/blivestat/utils/AesCipher;->createIv()Ljavax/crypto/spec/IvParameterSpec;

    move-result-object v4

    invoke-virtual {v2, v3, v1, v4}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V

    .line 68
    :cond_25
    sget-object v1, Lsg/bigo/sdk/blivestat/utils/AesCipher;->cipher:Ljavax/crypto/Cipher;

    invoke-direct {p0, p1}, Lsg/bigo/sdk/blivestat/utils/AesCipher;->fillBlock([B)[B

    move-result-object p1

    invoke-virtual {v1, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v0
    :try_end_2f
    .catchall {:try_start_4 .. :try_end_2f} :catchall_2f

    :catchall_2f
    return-object v0
.end method