.class public Lcom/zk/drivermonitor/utils/AESUtils;
.super Ljava/lang/Object;
.source "AESUtils.java"


# direct methods
.method public constructor <init>()V
    .locals 0

    .line 16
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public static a(Ljava/lang/String;)Ljava/lang/String;
    .locals 2

    .line 45
    invoke-virtual {p0}, Ljava/lang/String;->length()I

    move-result v0

    const/16 v1, 0x10

    if-le v0, v1, :cond_0

    const/4 v0, 0x0

    .line 47
    invoke-virtual {p0, v0, v1}, Ljava/lang/String;->substring(II)Ljava/lang/String;

    move-result-object p0

    goto :goto_1

    :cond_0
    :goto_0
    if-lt v0, v1, :cond_1

    :goto_1
    return-object p0

    .line 50
    :cond_1
    new-instance v0, Ljava/lang/StringBuffer;

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

    .line 51
    invoke-virtual {v0, p0}, Ljava/lang/StringBuffer;->append(Ljava/lang/String;)Ljava/lang/StringBuffer;

    const-string p0, "0"

    invoke-virtual {v0, p0}, Ljava/lang/StringBuffer;->append(Ljava/lang/String;)Ljava/lang/StringBuffer;

    .line 52
    invoke-virtual {v0}, Ljava/lang/StringBuffer;->toString()Ljava/lang/String;

    move-result-object p0

    .line 53
    invoke-virtual {p0}, Ljava/lang/String;->length()I

    move-result v0

    goto :goto_0
.end method

.method public static a([B)Ljava/lang/String;
    .locals 4

    const-string v0, "0123456789ABCDEF"

    if-nez p0, :cond_0

    const-string p0, ""

    return-object p0

    .line 172
    :cond_0
    new-instance v1, Ljava/lang/StringBuffer;

    array-length v2, p0

    mul-int/lit8 v2, v2, 0x2

    invoke-direct {v1, v2}, Ljava/lang/StringBuffer;-><init>(I)V

    const/4 v2, 0x0

    .line 173
    :goto_0
    array-length v3, p0

    if-lt v2, v3, :cond_1

    .line 177
    invoke-virtual {v1}, Ljava/lang/StringBuffer;->toString()Ljava/lang/String;

    move-result-object p0

    return-object p0

    .line 175
    :cond_1
    aget-byte v3, p0, v2

    shr-int/lit8 v3, v3, 0x4

    and-int/lit8 v3, v3, 0xf

    invoke-virtual {v0, v3}, Ljava/lang/String;->charAt(I)C

    move-result v3

    invoke-virtual {v1, v3}, Ljava/lang/StringBuffer;->append(C)Ljava/lang/StringBuffer;

    aget-byte v3, p0, v2

    and-int/lit8 v3, v3, 0xf

    invoke-virtual {v0, v3}, Ljava/lang/String;->charAt(I)C

    move-result v3

    invoke-virtual {v1, v3}, Ljava/lang/StringBuffer;->append(C)Ljava/lang/StringBuffer;

    add-int/lit8 v2, v2, 0x1

    goto :goto_0
.end method

.method public static a([B[B)[B
    .locals 2
    .annotation build Landroid/annotation/SuppressLint;
        value = {
            "TrulyRandom"
        }
    .end annotation

    .line 101
    :try_start_0
    invoke-static {p1}, Lcom/zk/drivermonitor/utils/AESUtils;->b([B)[B

    .line 103
    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

    const-string p1, "AES/ECB/PKCS5Padding"

    .line 105
    invoke-static {p1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object p1

    const/4 v1, 0x1

    .line 106
    invoke-virtual {p1, v1, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    .line 108
    invoke-virtual {p1, p0}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object p0
    :try_end_0
    .catch Ljava/lang/Exception; {:try_start_0 .. :try_end_0} :catch_0

    return-object p0

    :catch_0
    move-exception p0

    .line 111
    invoke-virtual {p0}, Ljava/lang/Exception;->printStackTrace()V

    const/4 p0, 0x0

    return-object p0
.end method

.method private static b([B)[B
    .locals 3

    :try_start_0
    const-string v0, "AES"

    .line 191
    invoke-static {v0}, Ljavax/crypto/KeyGenerator;->getInstance(Ljava/lang/String;)Ljavax/crypto/KeyGenerator;

    move-result-object v0

    .line 193
    sget v1, Landroid/os/Build$VERSION;->SDK_INT:I

    const/16 v2, 0x11

    if-lt v1, v2, :cond_0

    const-string v1, "SHA1PRNG"

    const-string v2, "Crypto"

    .line 194
    invoke-static {v1, v2}, Ljava/security/SecureRandom;->getInstance(Ljava/lang/String;Ljava/lang/String;)Ljava/security/SecureRandom;

    move-result-object v1

    goto :goto_0

    :cond_0
    const-string v1, "SHA1PRNG"

    .line 196
    invoke-static {v1}, Ljava/security/SecureRandom;->getInstance(Ljava/lang/String;)Ljava/security/SecureRandom;

    move-result-object v1

    .line 199
    :goto_0
    invoke-virtual {v1, p0}, Ljava/security/SecureRandom;->setSeed([B)V

    const/16 p0, 0x80

    .line 201
    invoke-virtual {v0, p0, v1}, Ljavax/crypto/KeyGenerator;->init(ILjava/security/SecureRandom;)V

    .line 203
    invoke-virtual {v0}, Ljavax/crypto/KeyGenerator;->generateKey()Ljavax/crypto/SecretKey;

    move-result-object p0

    .line 204
    invoke-interface {p0}, Ljavax/crypto/SecretKey;->getEncoded()[B

    move-result-object p0
    :try_end_0
    .catch Ljava/lang/Exception; {:try_start_0 .. :try_end_0} :catch_0

    return-object p0

    :catch_0
    move-exception p0

    .line 209
    invoke-virtual {p0}, Ljava/lang/Exception;->printStackTrace()V

    const/4 p0, 0x0

    return-object p0
.end method