AESUtils.smali

.class public Lcom/alivc/rtc/device/utils/AESUtils;
.super Ljava/lang/Object;
.source "AESUtils.java"


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

    return-void
.end method

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

    .line 8
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 9
    return-void
.end method

.method private static appendHex(Ljava/lang/StringBuffer;B)V
    .registers 5
    .param p0, "sb"    # Ljava/lang/StringBuffer;
    .param p1, "b"    # B

    .line 79
    const-string v0, "0123456789ABCDEF"

    .line 80
    .local v0, "HEX":Ljava/lang/String;
    shr-int/lit8 v1, p1, 0x4

    and-int/lit8 v1, v1, 0xf

    const-string v2, "0123456789ABCDEF"

    invoke-virtual {v2, v1}, Ljava/lang/String;->charAt(I)C

    move-result v1

    invoke-virtual {p0, v1}, Ljava/lang/StringBuffer;->append(C)Ljava/lang/StringBuffer;

    and-int/lit8 v1, p1, 0xf

    invoke-virtual {v2, v1}, Ljava/lang/String;->charAt(I)C

    move-result v1

    invoke-virtual {p0, v1}, Ljava/lang/StringBuffer;->append(C)Ljava/lang/StringBuffer;

    .line 81
    return-void
.end method

.method public static decrypt(Ljava/lang/String;)Ljava/lang/String;
    .registers 5
    .param p0, "encrypted"    # Ljava/lang/String;

    .line 25
    :try_start_0
    invoke-static {}, Lcom/alivc/rtc/device/utils/AESUtils;->getRawKey()[B

    move-result-object v0

    .line 26
    .local v0, "rawKey":[B
    invoke-static {p0}, Lcom/alivc/rtc/device/utils/AESUtils;->toByte(Ljava/lang/String;)[B

    move-result-object v1

    .line 27
    .local v1, "enc":[B
    invoke-static {v0, v1}, Lcom/alivc/rtc/device/utils/AESUtils;->decrypt([B[B)[B

    move-result-object v2

    .line 28
    .local v2, "result":[B
    new-instance v3, Ljava/lang/String;

    invoke-direct {v3, v2}, Ljava/lang/String;-><init>([B)V
    :try_end_11
    .catch Ljava/lang/Exception; {:try_start_0 .. :try_end_11} :catch_12

    return-object v3

    .line 29
    .end local v0    # "rawKey":[B
    .end local v1    # "enc":[B
    .end local v2    # "result":[B
    :catch_12
    move-exception v0

    .line 30
    .local v0, "var4":Ljava/lang/Exception;
    const/4 v1, 0x0

    return-object v1
.end method

.method private static decrypt([B[B)[B
    .registers 6
    .param p0, "raw"    # [B
    .param p1, "encrypted"    # [B
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .line 47
    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 48
    .local v0, "skeySpec":Ljavax/crypto/spec/SecretKeySpec;
    const-string v1, "AES/CBC/PKCS5Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v1

    .line 49
    .local v1, "cipher":Ljavax/crypto/Cipher;
    new-instance v2, Ljavax/crypto/spec/IvParameterSpec;

    invoke-virtual {v1}, Ljavax/crypto/Cipher;->getBlockSize()I

    move-result v3

    new-array v3, v3, [B

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

    const/4 v3, 0x2

    invoke-virtual {v1, v3, v0, v2}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V

    .line 50
    invoke-virtual {v1, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v2

    return-object v2
.end method

.method public static encrypt(Ljava/lang/String;)Ljava/lang/String;
    .registers 4
    .param p0, "clearText"    # Ljava/lang/String;

    .line 12
    const/4 v0, 0x0

    .line 15
    .local v0, "result":[B
    :try_start_1
    invoke-static {}, Lcom/alivc/rtc/device/utils/AESUtils;->getRawKey()[B

    move-result-object v1

    .line 16
    .local v1, "rawkey":[B
    invoke-virtual {p0}, Ljava/lang/String;->getBytes()[B

    move-result-object v2

    invoke-static {v1, v2}, Lcom/alivc/rtc/device/utils/AESUtils;->encrypt([B[B)[B

    move-result-object v2
    :try_end_d
    .catch Ljava/lang/Exception; {:try_start_1 .. :try_end_d} :catch_f

    move-object v0, v2

    .line 18
    .end local v1    # "rawkey":[B
    goto :goto_10

    .line 17
    :catch_f
    move-exception v1

    .line 20
    :goto_10
    if-eqz v0, :cond_17

    invoke-static {v0}, Lcom/alivc/rtc/device/utils/AESUtils;->toHex([B)Ljava/lang/String;

    move-result-object v1

    goto :goto_18

    :cond_17
    const/4 v1, 0x0

    :goto_18
    return-object v1
.end method

.method private static encrypt([B[B)[B
    .registers 6
    .param p0, "raw"    # [B
    .param p1, "clear"    # [B
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .line 40
    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 41
    .local v0, "skeySpec":Ljavax/crypto/spec/SecretKeySpec;
    const-string v1, "AES/CBC/PKCS5Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v1

    .line 42
    .local v1, "cipher":Ljavax/crypto/Cipher;
    new-instance v2, Ljavax/crypto/spec/IvParameterSpec;

    invoke-virtual {v1}, Ljavax/crypto/Cipher;->getBlockSize()I

    move-result v3

    new-array v3, v3, [B

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

    const/4 v3, 0x1

    invoke-virtual {v1, v3, v0, v2}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V

    .line 43
    invoke-virtual {v1, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v2

    return-object v2
.end method

.method private static getRawKey()[B
    .registers 2
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .line 35
    const/16 v0, 0x10

    new-array v0, v0, [B

    fill-array-data v0, :array_c

    .line 36
    .local v0, "key":[B
    invoke-static {v0}, Lcom/alivc/rtc/device/utils/RC4;->rc4([B)[B

    move-result-object v1

    return-object v1

    :array_c
    .array-data 1
        0x21t
        0x53t
        -0x32t
        -0x59t
        -0x54t
        -0x72t
        0x50t
        0x63t
        0xat
        0x3ft
        0x16t
        -0x41t
        -0xbt
        0x1et
        0x65t
        -0x76t
    .end array-data
.end method

.method private static toByte(Ljava/lang/String;)[B
    .registers 6
    .param p0, "hexString"    # Ljava/lang/String;

    .line 54
    invoke-virtual {p0}, Ljava/lang/String;->length()I

    move-result v0

    div-int/lit8 v0, v0, 0x2

    .line 55
    .local v0, "len":I
    new-array v1, v0, [B

    .line 57
    .local v1, "result":[B
    const/4 v2, 0x0

    .local v2, "i":I
    :goto_9
    if-ge v2, v0, :cond_24

    .line 58
    mul-int/lit8 v3, v2, 0x2

    mul-int/lit8 v4, v2, 0x2

    add-int/lit8 v4, v4, 0x2

    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

    .line 57
    add-int/lit8 v2, v2, 0x1

    goto :goto_9

    .line 61
    .end local v2    # "i":I
    :cond_24
    return-object v1
.end method

.method private static toHex([B)Ljava/lang/String;
    .registers 4
    .param p0, "buf"    # [B

    .line 65
    if-nez p0, :cond_5

    .line 66
    const-string v0, ""

    return-object v0

    .line 68
    :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

    .line 70
    .local v0, "result":Ljava/lang/StringBuffer;
    const/4 v1, 0x0

    .local v1, "i":I
    :goto_e
    array-length v2, p0

    if-ge v1, v2, :cond_19

    .line 71
    aget-byte v2, p0, v1

    invoke-static {v0, v2}, Lcom/alivc/rtc/device/utils/AESUtils;->appendHex(Ljava/lang/StringBuffer;B)V

    .line 70
    add-int/lit8 v1, v1, 0x1

    goto :goto_e

    .line 74
    .end local v1    # "i":I
    :cond_19
    invoke-virtual {v0}, Ljava/lang/StringBuffer;->toString()Ljava/lang/String;

    move-result-object v1

    return-object v1
.end method