# 解码一个input stream到Bitmap
.method private static a(Ljava/lang/String;I)Landroid/graphics/Bitmap;
.locals 11
.prologue
const/4 v3, 0x1
const/4 v9, -0x1
const/high16 v6, 0x3f800000
const/4 v8, 0x0
.line 197
.line 200
:try_start_0
# 新建一个自定义的InputStream对象
new-instance v0, Lcom/ijinshan/mPrivacy/c/j;
# 使用文件初始化InputStream
invoke-direct {v0, p0}, Lcom/ijinshan/mPrivacy/c/j;-><init>(Ljava/lang/String;)V
.line 201
invoke-virtual {v0}, Lcom/ijinshan/mPrivacy/c/j;->available()I
move-result v1
if-ne v1, v9, :cond_0
move-object v0, v8
.line 264
:goto_0
return-object v0
.line 205
:cond_0
# 新建一个BitmapFactory对象
new-instance v1, Landroid/graphics/BitmapFactory$Options;
invoke-direct {v1}, Landroid/graphics/BitmapFactory$Options;-><init>()V
.line 208
const/4 v2, 0x1
iput-boolean v2, v1, Landroid/graphics/BitmapFactory$Options;->inJustDecodeBounds:Z
.line 209
const/4 v2, 0x0
# 调用BitmapFactory的decodeStream方法，解码input stream到Bitmap
invoke-static {v0, v2, v1}, Landroid/graphics/BitmapFactory;->decodeStream(Ljava/io/InputStream;Landroid/graphics/Rect;Landroid/graphics/BitmapFactory$Options;)Landroid/graphics/Bitmap;
.method public final read([BII)I
.locals 7
.prologue
const/4 v6, 0x0
const/16 v5, 0x400
.line 61
iget-object v0, p0, Lcom/ijinshan/mPrivacy/c/j;->a:Ljava/io/FileInputStream;
# p2（byteOffset），p3（byteCount）=0x10000
invoke-virtual {v0, p1, p2, p3}, Ljava/io/FileInputStream;->read([BII)I
move-result v0
.line 63
const/4 v1, -0x1
# 判断返回值是否为-1，-1即读到文件末尾
if-ne v0, v1, :cond_0
.line 103
:goto_0
return v0
.line 70
:cond_0
# f保存了已读的字节数
iget-wide v1, p0, Lcom/ijinshan/mPrivacy/c/j;->f:J
const-wide/16 v3, 0x400
cmp-long v1, v1, v3
# 判断已读的字节数是否大于或等于0x400字节
if-gtz v1, :cond_5
# 第一次读的话，执行如下代码
.line 73
# e是个bool值，判断是否已经解密了前面的0x400字节
iget-boolean v1, p0, Lcom/ijinshan/mPrivacy/c/j;->e:Z
if-nez v1, :cond_1
# 第一次读取，未解密，执行如下代码
.line 75
iget-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->c:Lcom/ijinshan/mPrivacy/c/g;
# b是个String类型的变量，其中保存了加密后文件的路径，例如/storage/sdcard0/.ksbox/6b2c357d
iget-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->b:Ljava/lang/String;
# 调用g;->b方法，解密前面0x400字节
invoke-static {v1}, Lcom/ijinshan/mPrivacy/c/g;->b(Ljava/lang/String;)[B
move-result-object v1
# 将解密出来的字节数组保存到d变量中
iput-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
.line 76
iget-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
# 判断字节数组是否为空
if-eqz v1, :cond_1
.line 77
const/4 v1, 0x1
# 返回不为空，那么设置变量e为true，即解密成功
iput-boolean v1, p0, Lcom/ijinshan/mPrivacy/c/j;->e:Z
.line 80
:cond_1
# v0寄存器保存了实际读取到的字节数，p3是想要读取的字节数，即0x10000
if-ge v0, p3, :cond_3
move v1, v0
.line 82
:goto_1
# v2 = byteOffset + 实际读到的字节数
add-int v2, p2, v1
# 如果v2大于0x400，就跳到cond_4
if-gt v2, v5, :cond_4
.line 84
iget-object v2, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
if-eqz v2, :cond_2
.line 85
# 将前面解密的数据赋给v2寄存器
iget-object v2, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
# v2拷贝到p1，p2为srcOffset，v6是desOffset，v1为拷贝大小
invoke-static {v2, p2, p1, v6, v1}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V
.line 100
:cond_2
:goto_2
# 已经读取的字节数
iget-wide v1, p0, Lcom/ijinshan/mPrivacy/c/j;->f:J
# v0为实际读到的字节数，转成long，保存到v3
int-to-long v3, v0
add-long/2addr v1, v3
# 本次实际读到的字节数 + 以前已经读取的字节数，保存到f变量
iput-wide v1, p0, Lcom/ijinshan/mPrivacy/c/j;->f:J
goto :goto_0
:cond_3
move v1, p3
.line 80
goto :goto_1
.line 89
:cond_4
if-ge p2, v5, :cond_2
.line 91
iget-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
if-eqz v1, :cond_2
.line 92
iget-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
sub-int v2, v5, p2
# 后面的数据不用解密，直接拷贝即可
invoke-static {v1, p2, p1, v6, v2}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V
goto :goto_2
.line 98
# 如果已读的字节数大于0x400，就跳到这里执行
:cond_5
const/4 v1, 0x0
# 清空d变量
iput-object v1, p0, Lcom/ijinshan/mPrivacy/c/j;->d:[B
goto :goto_2
.end method
# 解密文件
# p0: 加密后文件的路径，例如/storage/sdcard0/.ksbox/6b2c357d
.method public static b(Ljava/lang/String;)[B
.locals 2
.prologue
const/4 v1, 0x0
.line 456
:try_start_0
# 判断是否是我们的加密文件，判断文件开头特征等等
invoke-static {p0}, Lcom/ijinshan/mPrivacy/c/g;->h(Ljava/lang/String;)[B
move-result-object v0
.line 457
if-nez v0, :cond_0
move-object v0, v1
.line 472
:goto_0
return-object v0
.line 461
:cond_0
# 调用b(Ljava/lang/String;I)[B，读取_e文件的内容
invoke-static {p0}, Lcom/ijinshan/mPrivacy/c/g;->i(Ljava/lang/String;)[B
# v0即为_e文件的内容
move-result-object v0
.line 462
if-eqz v0, :cond_1
.line 464
# 调用解密函数，解密v0
invoke-static {v0}, Lcom/ijinshan/mPrivacy/c/g;->a([B)[B
:try_end_0
.catch Ljava/io/IOException; {:try_start_0 .. :try_end_0} :catch_0
move-result-object v0
goto :goto_0
.line 467
:catch_0
move-exception v0
invoke-virtual {v0}, Ljava/io/IOException;->printStackTrace()V
:cond_1
move-object v0, v1
.line 472
goto :goto_0
.end method
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