RC4.smali

.class public Lcom/alivc/rtc/device/utils/RC4;
.super Ljava/lang/Object;
.source "RC4.java"


# annotations
.annotation system Ldalvik/annotation/MemberClasses;
    value = {
        Lcom/alivc/rtc/device/utils/RC4$RC4Key;
    }
.end annotation


# static fields
.field private static final RC4_PK:Ljava/lang/String; = "QrMgt8GGYI6T52ZY5AnhtxkLzb8egpFn3j5JELI8H6wtACbUnZ5cc3aYTsTRbmkAkRJeYbtx92LPBWm7nBO9UIl7y5i5MQNmUZNf5QENurR5tGyo7yJ2G0MBjWvy6iAtlAbacKP0SwOUeUWx5dsBdyhxa7Id1APtybSdDgicBDuNjI0mlZFUzZSS9dmN8lBD0WTVOMz0pRZbR3cysomRXOO1ghqjJdTcyDIxzpNAEszN8RMGjrzyU7Hjbmwi6YNK"


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

    return-void
.end method

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

    .line 6
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 7
    return-void
.end method

.method private static prepareKey(Ljava/lang/String;)Lcom/alivc/rtc/device/utils/RC4$RC4Key;
    .registers 10
    .param p0, "pPrivateKey"    # Ljava/lang/String;

    .line 21
    const/4 v0, 0x0

    if-nez p0, :cond_4

    .line 22
    return-object v0

    .line 24
    :cond_4
    new-instance v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;

    invoke-direct {v1, v0}, Lcom/alivc/rtc/device/utils/RC4$RC4Key;-><init>(Lcom/alivc/rtc/device/utils/RC4$1;)V

    .line 27
    .local v1, "lRC4Key":Lcom/alivc/rtc/device/utils/RC4$RC4Key;
    const/4 v2, 0x0

    .local v2, "counter":I
    :goto_a
    const/16 v3, 0x100

    if-ge v2, v3, :cond_16

    iget-object v3, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    add-int/lit8 v4, v2, 0x1

    .end local v2    # "counter":I
    .local v4, "counter":I
    aput v2, v3, v2

    move v2, v4

    goto :goto_a

    .line 30
    .end local v4    # "counter":I
    .restart local v2    # "counter":I
    :cond_16
    const/4 v4, 0x0

    iput v4, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->x:I

    .line 31
    iput v4, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->y:I

    .line 32
    const/4 v4, 0x0

    .line 33
    .local v4, "index1":I
    const/4 v5, 0x0

    .line 36
    .local v5, "index2":I
    const/4 v2, 0x0

    :goto_1e
    if-ge v2, v3, :cond_49

    .line 37
    :try_start_20
    invoke-virtual {p0, v4}, Ljava/lang/String;->charAt(I)C

    move-result v6

    iget-object v7, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v7, v7, v2

    add-int/2addr v6, v7

    add-int/2addr v6, v5

    rem-int/2addr v6, v3

    move v5, v6

    .line 38
    iget-object v6, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v6, v6, v2

    .line 39
    .local v6, "swapInt":I
    iget-object v7, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    iget-object v8, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v8, v8, v5

    aput v8, v7, v2

    .line 40
    iget-object v7, v1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aput v6, v7, v5

    .line 41
    add-int/lit8 v7, v4, 0x1

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

    move-result v8

    rem-int/2addr v7, v8
    :try_end_43
    .catch Ljava/lang/Exception; {:try_start_20 .. :try_end_43} :catch_47

    move v4, v7

    .line 36
    .end local v6    # "swapInt":I
    add-int/lit8 v2, v2, 0x1

    goto :goto_1e

    .line 45
    :catch_47
    move-exception v3

    .line 46
    .local v3, "var6":Ljava/lang/Exception;
    return-object v0

    .line 44
    .end local v3    # "var6":Ljava/lang/Exception;
    :cond_49
    return-object v1
.end method

.method public static rc4([B)[B
    .registers 3
    .param p0, "pData"    # [B

    .line 10
    if-eqz p0, :cond_f

    .line 11
    const-string v0, "QrMgt8GGYI6T52ZY5AnhtxkLzb8egpFn3j5JELI8H6wtACbUnZ5cc3aYTsTRbmkAkRJeYbtx92LPBWm7nBO9UIl7y5i5MQNmUZNf5QENurR5tGyo7yJ2G0MBjWvy6iAtlAbacKP0SwOUeUWx5dsBdyhxa7Id1APtybSdDgicBDuNjI0mlZFUzZSS9dmN8lBD0WTVOMz0pRZbR3cysomRXOO1ghqjJdTcyDIxzpNAEszN8RMGjrzyU7Hjbmwi6YNK"

    invoke-static {v0}, Lcom/alivc/rtc/device/utils/RC4;->prepareKey(Ljava/lang/String;)Lcom/alivc/rtc/device/utils/RC4$RC4Key;

    move-result-object v0

    .line 12
    .local v0, "lRC4Key":Lcom/alivc/rtc/device/utils/RC4$RC4Key;
    if-eqz v0, :cond_f

    .line 13
    invoke-static {p0, v0}, Lcom/alivc/rtc/device/utils/RC4;->rc4([BLcom/alivc/rtc/device/utils/RC4$RC4Key;)[B

    move-result-object v1

    return-object v1

    .line 17
    .end local v0    # "lRC4Key":Lcom/alivc/rtc/device/utils/RC4$RC4Key;
    :cond_f
    const/4 v0, 0x0

    return-object v0
.end method

.method private static rc4([BLcom/alivc/rtc/device/utils/RC4$RC4Key;)[B
    .registers 9
    .param p0, "pData"    # [B
    .param p1, "pKey"    # Lcom/alivc/rtc/device/utils/RC4$RC4Key;

    .line 52
    if-eqz p0, :cond_44

    if-eqz p1, :cond_44

    .line 53
    iget v0, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->x:I

    .line 54
    .local v0, "x":I
    iget v1, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->y:I

    .line 56
    .local v1, "y":I
    const/4 v2, 0x0

    .local v2, "counter":I
    :goto_9
    array-length v3, p0

    if-ge v2, v3, :cond_3f

    .line 57
    add-int/lit8 v3, v0, 0x1

    rem-int/lit16 v0, v3, 0x100

    .line 58
    iget-object v3, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v3, v3, v0

    add-int/2addr v3, v1

    rem-int/lit16 v1, v3, 0x100

    .line 59
    iget-object v3, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v3, v3, v0

    .line 60
    .local v3, "lSwapInt":I
    iget-object v4, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    iget-object v5, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v5, v5, v1

    aput v5, v4, v0

    .line 61
    iget-object v4, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aput v3, v4, v1

    .line 62
    iget-object v4, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v4, v4, v0

    iget-object v5, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v5, v5, v1

    add-int/2addr v4, v5

    rem-int/lit16 v4, v4, 0x100

    .line 63
    .local v4, "xorIndex":I
    aget-byte v5, p0, v2

    iget-object v6, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->state:[I

    aget v6, v6, v4

    xor-int/2addr v5, v6

    int-to-byte v5, v5

    aput-byte v5, p0, v2

    .line 56
    .end local v3    # "lSwapInt":I
    .end local v4    # "xorIndex":I
    add-int/lit8 v2, v2, 0x1

    goto :goto_9

    .line 66
    .end local v2    # "counter":I
    :cond_3f
    iput v0, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->x:I

    .line 67
    iput v1, p1, Lcom/alivc/rtc/device/utils/RC4$RC4Key;->y:I

    .line 68
    return-object p0

    .line 70
    .end local v0    # "x":I
    .end local v1    # "y":I
    :cond_44
    const/4 v0, 0x0

    return-object v0
.end method