.class public Lcom/ta/utdid2/android/utils/AESUtils;
.super Ljava/lang/Object;
.source "AESUtils.java"


# static fields
.field public static final TAG:Ljava/lang/String; = "AESUtils"


# direct methods
.method public constructor <init>()V
    .registers 1

    .line 12
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method private static appendHex(Ljava/lang/StringBuffer;B)V
    .registers 4

    shr-int/lit8 v0, p1, 0x4

    and-int/lit8 v0, v0, 0xf

    .line 103
    const-string v1, "0123456789ABCDEF"

    invoke-virtual {v1, v0}, Ljava/lang/String;->charAt(I)C

    move-result v0

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

    move-result-object p0

    and-int/lit8 p1, p1, 0xf

    invoke-virtual {v1, p1}, Ljava/lang/String;->charAt(I)C

    move-result p1

    invoke-virtual {p0, p1}, Ljava/lang/StringBuffer;->append(C)Ljava/lang/StringBuffer;

    return-void
.end method

.method public static decrypt(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
    .registers 2

    .line 33
    :try_start_0
    invoke-virtual {p0}, Ljava/lang/String;->getBytes()[B

    move-result-object p0

    invoke-static {p0}, Lcom/ta/utdid2/android/utils/AESUtils;->getRawKey([B)[B

    move-result-object p0

    .line 34
    invoke-static {p1}, Lcom/ta/utdid2/android/utils/AESUtils;->toByte(Ljava/lang/String;)[B

    move-result-object p1

    .line 35
    invoke-static {p0, p1}, Lcom/ta/utdid2/android/utils/AESUtils;->decrypt([B[B)[B

    move-result-object p0

    .line 36
    new-instance p1, Ljava/lang/String;

    invoke-direct {p1, p0}, Ljava/lang/String;-><init>([B)V
    :try_end_15
    .catch Ljava/lang/Exception; {:try_start_0 .. :try_end_15} :catch_16

    return-object p1

    :catch_16
    const/4 p0, 0x0

    return-object p0
.end method

.method private static decrypt([B[B)[B
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .line 67
    new-instance v0, Ljavax/crypto/spec/SecretKeySpec;

    const-string v1, "AES"

    invoke-direct {v0, p0, v1}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 68
    const-string p0, "AES/CBC/PKCS5Padding"

    invoke-static {p0}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object p0

    .line 69
    new-instance v1, Ljavax/crypto/spec/IvParameterSpec;

    invoke-virtual {p0}, Ljavax/crypto/Cipher;->getBlockSize()I

    move-result v2

    new-array v2, v2, [B

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

    const/4 v2, 0x2

    invoke-virtual {p0, v2, v0, v1}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V

    .line 71
    invoke-virtual {p0, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object p0

    return-object p0
.end method

.method public static encrypt(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
    .registers 3

    const/4 v0, 0x0

    .line 18
    :try_start_1
    invoke-virtual {p0}, Ljava/lang/String;->getBytes()[B

    move-result-object p0

    invoke-static {p0}, Lcom/ta/utdid2/android/utils/AESUtils;->getRawKey([B)[B

    move-result-object p0

    .line 19
    invoke-virtual {p1}, Ljava/lang/String;->getBytes()[B

    move-result-object p1

    invoke-static {p0, p1}, Lcom/ta/utdid2/android/utils/AESUtils;->encrypt([B[B)[B

    move-result-object p0
    :try_end_11
    .catch Ljava/lang/Exception; {:try_start_1 .. :try_end_11} :catch_12

    goto :goto_17

    :catch_12
    move-exception p0

    .line 21
    invoke-virtual {p0}, Ljava/lang/Exception;->printStackTrace()V

    move-object p0, v0

    :goto_17
    if-eqz p0, :cond_1e

    .line 24
    invoke-static {p0}, Lcom/ta/utdid2/android/utils/AESUtils;->toHex([B)Ljava/lang/String;

    move-result-object p0

    return-object p0

    :cond_1e
    return-object v0
.end method

.method private static encrypt([B[B)[B
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .line 57
    new-instance v0, Ljavax/crypto/spec/SecretKeySpec;

    const-string v1, "AES"

    invoke-direct {v0, p0, v1}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 58
    const-string p0, "AES/CBC/PKCS5Padding"

    invoke-static {p0}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object p0

    .line 59
    new-instance v1, Ljavax/crypto/spec/IvParameterSpec;

    invoke-virtual {p0}, Ljavax/crypto/Cipher;->getBlockSize()I

    move-result v2

    new-array v2, v2, [B

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

    const/4 v2, 0x1

    invoke-virtual {p0, v2, v0, v1}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V

    .line 61
    invoke-virtual {p0, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object p0

    return-object p0
.end method

.method public static fromHex(Ljava/lang/String;)Ljava/lang/String;
    .registers 2

    .line 80
    new-instance v0, Ljava/lang/String;

    invoke-static {p0}, Lcom/ta/utdid2/android/utils/AESUtils;->toByte(Ljava/lang/String;)[B

    move-result-object p0

    invoke-direct {v0, p0}, Ljava/lang/String;-><init>([B)V

    return-object v0
.end method

.method private static getRawKey([B)[B
    .registers 4
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .line 46
    const-string v0, "AES"

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

    move-result-object v0

    .line 47
    const-string v1, "SHA1PRNG"

    const-string v2, "Crypto"

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

    move-result-object v1

    .line 48
    invoke-virtual {v1, p0}, Ljava/security/SecureRandom;->setSeed([B)V

    const/16 p0, 0x80

    .line 49
    invoke-virtual {v0, p0, v1}, Ljavax/crypto/KeyGenerator;->init(ILjava/security/SecureRandom;)V

    .line 50
    invoke-virtual {v0}, Ljavax/crypto/KeyGenerator;->generateKey()Ljavax/crypto/SecretKey;

    move-result-object p0

    .line 51
    invoke-interface {p0}, Ljavax/crypto/SecretKey;->getEncoded()[B

    move-result-object p0

    return-object p0
.end method

.method public static toByte(Ljava/lang/String;)[B
    .registers 6

    .line 84
    invoke-virtual {p0}, Ljava/lang/String;->length()I

    move-result v0

    div-int/lit8 v0, v0, 0x2

    .line 85
    new-array v1, v0, [B

    const/4 v2, 0x0

    :goto_9
    if-ge v2, v0, :cond_22

    mul-int/lit8 v3, v2, 0x2

    add-int/lit8 v4, v3, 0x2

    .line 87
    invoke-virtual {p0, v3, v4}, Ljava/lang/String;->substring(II)Ljava/lang/String;

    move-result-object v3

    const/16 v4, 0x10

    invoke-static {v3, v4}, Ljava/lang/Integer;->valueOf(Ljava/lang/String;I)Ljava/lang/Integer;

    move-result-object v3

    invoke-virtual {v3}, Ljava/lang/Integer;->byteValue()B

    move-result v3

    aput-byte v3, v1, v2

    add-int/lit8 v2, v2, 0x1

    goto :goto_9

    :cond_22
    return-object v1
.end method

.method public static toHex(Ljava/lang/String;)Ljava/lang/String;
    .registers 1

    .line 76
    invoke-virtual {p0}, Ljava/lang/String;->getBytes()[B

    move-result-object p0

    invoke-static {p0}, Lcom/ta/utdid2/android/utils/AESUtils;->toHex([B)Ljava/lang/String;

    move-result-object p0

    return-object p0
.end method

.method public static toHex([B)Ljava/lang/String;
    .registers 4

    if-nez p0, :cond_5

    .line 93
    const-string p0, ""

    return-object p0

    .line 94
    :cond_5
    new-instance v0, Ljava/lang/StringBuffer;

    array-length v1, p0

    mul-int/lit8 v1, v1, 0x2

    invoke-direct {v0, v1}, Ljava/lang/StringBuffer;-><init>(I)V

    const/4 v1, 0x0

    .line 95
    :goto_e
    array-length v2, p0

    if-ge v1, v2, :cond_19

    .line 96
    aget-byte v2, p0, v1

    invoke-static {v0, v2}, Lcom/ta/utdid2/android/utils/AESUtils;->appendHex(Ljava/lang/StringBuffer;B)V

    add-int/lit8 v1, v1, 0x1

    goto :goto_e

    .line 98
    :cond_19
    invoke-virtual {v0}, Ljava/lang/StringBuffer;->toString()Ljava/lang/String;

    move-result-object p0

    return-object p0
.end method