RC4.smali

.class public Lcom/baidu/android/common/security/RC4;
.super Ljava/lang/Object;


# instance fields
.field private a:[B

.field private b:I

.field private c:I

.field private d:[B


# direct methods
.method public constructor <init>(Ljava/lang/String;)V
    .registers 4

    const/4 v1, 0x0

    const/4 v0, 0x0

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

    iput-object v1, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iput v0, p0, Lcom/baidu/android/common/security/RC4;->b:I

    iput v0, p0, Lcom/baidu/android/common/security/RC4;->c:I

    iput-object v1, p0, Lcom/baidu/android/common/security/RC4;->d:[B

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

    move-result-object v0

    iput-object v0, p0, Lcom/baidu/android/common/security/RC4;->d:[B

    return-void
.end method

.method private a()V
    .registers 2

    iget-object v0, p0, Lcom/baidu/android/common/security/RC4;->d:[B

    invoke-direct {p0, v0}, Lcom/baidu/android/common/security/RC4;->a([B)V

    return-void
.end method

.method private a([B)V
    .registers 9

    const/16 v6, 0x100

    const/4 v0, 0x0

    iput v0, p0, Lcom/baidu/android/common/security/RC4;->b:I

    iput v0, p0, Lcom/baidu/android/common/security/RC4;->c:I

    iget-object v1, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    if-nez v1, :cond_f

    new-array v1, v6, [B

    iput-object v1, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    :cond_f
    move v1, v0

    :goto_10
    if-ge v1, v6, :cond_1a

    iget-object v2, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    int-to-byte v3, v1

    aput-byte v3, v2, v1

    add-int/lit8 v1, v1, 0x1

    goto :goto_10

    :cond_1a
    move v1, v0

    move v2, v0

    :goto_1c
    if-ge v0, v6, :cond_41

    aget-byte v3, p1, v2

    and-int/lit16 v3, v3, 0xff

    iget-object v4, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    aget-byte v4, v4, v0

    add-int/2addr v3, v4

    add-int/2addr v1, v3

    and-int/lit16 v1, v1, 0xff

    iget-object v3, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    aget-byte v3, v3, v0

    iget-object v4, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget-object v5, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    aget-byte v5, v5, v1

    aput-byte v5, v4, v0

    iget-object v4, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    aput-byte v3, v4, v1

    add-int/lit8 v2, v2, 0x1

    array-length v3, p1

    rem-int/2addr v2, v3

    add-int/lit8 v0, v0, 0x1

    goto :goto_1c

    :cond_41
    return-void
.end method

.method private a([BII[BI)V
    .registers 13

    add-int v0, p2, p3

    array-length v1, p1

    if-le v0, v1, :cond_d

    new-instance v0, Ljava/lang/RuntimeException;

    const-string v1, "input buffer too short"

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

    throw v0

    :cond_d
    add-int v0, p5, p3

    array-length v1, p4

    if-le v0, v1, :cond_1a

    new-instance v0, Ljava/lang/RuntimeException;

    const-string v1, "output buffer too short"

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

    throw v0

    :cond_1a
    const/4 v0, 0x0

    :goto_1b
    if-ge v0, p3, :cond_6a

    iget v1, p0, Lcom/baidu/android/common/security/RC4;->b:I

    add-int/lit8 v1, v1, 0x1

    and-int/lit16 v1, v1, 0xff

    iput v1, p0, Lcom/baidu/android/common/security/RC4;->b:I

    iget-object v1, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v2, p0, Lcom/baidu/android/common/security/RC4;->b:I

    aget-byte v1, v1, v2

    iget v2, p0, Lcom/baidu/android/common/security/RC4;->c:I

    add-int/2addr v1, v2

    and-int/lit16 v1, v1, 0xff

    iput v1, p0, Lcom/baidu/android/common/security/RC4;->c:I

    iget-object v1, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v2, p0, Lcom/baidu/android/common/security/RC4;->b:I

    aget-byte v1, v1, v2

    iget-object v2, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v3, p0, Lcom/baidu/android/common/security/RC4;->b:I

    iget-object v4, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v5, p0, Lcom/baidu/android/common/security/RC4;->c:I

    aget-byte v4, v4, v5

    aput-byte v4, v2, v3

    iget-object v2, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v3, p0, Lcom/baidu/android/common/security/RC4;->c:I

    aput-byte v1, v2, v3

    add-int v1, v0, p5

    add-int v2, v0, p2

    aget-byte v2, p1, v2

    iget-object v3, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget-object v4, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v5, p0, Lcom/baidu/android/common/security/RC4;->b:I

    aget-byte v4, v4, v5

    iget-object v5, p0, Lcom/baidu/android/common/security/RC4;->a:[B

    iget v6, p0, Lcom/baidu/android/common/security/RC4;->c:I

    aget-byte v5, v5, v6

    add-int/2addr v4, v5

    and-int/lit16 v4, v4, 0xff

    aget-byte v3, v3, v4

    xor-int/2addr v2, v3

    int-to-byte v2, v2

    aput-byte v2, p4, v1

    add-int/lit8 v0, v0, 0x1

    goto :goto_1b

    :cond_6a
    return-void
.end method


# virtual methods
.method public decrypt([B)[B
    .registers 8

    const/4 v2, 0x0

    invoke-direct {p0}, Lcom/baidu/android/common/security/RC4;->a()V

    array-length v0, p1

    new-array v4, v0, [B

    array-length v3, p1

    move-object v0, p0

    move-object v1, p1

    move v5, v2

    invoke-direct/range {v0 .. v5}, Lcom/baidu/android/common/security/RC4;->a([BII[BI)V

    return-object v4
.end method

.method public encrypt([B)[B
    .registers 8

    const/4 v2, 0x0

    invoke-direct {p0}, Lcom/baidu/android/common/security/RC4;->a()V

    array-length v0, p1

    new-array v4, v0, [B

    array-length v3, p1

    move-object v0, p0

    move-object v1, p1

    move v5, v2

    invoke-direct/range {v0 .. v5}, Lcom/baidu/android/common/security/RC4;->a([BII[BI)V

    return-object v4
.end method